weston/libweston/backend-drm/drm.c
Daniel Stone 7580b3c09e compositor-drm: Move FB handling to a separate file
Move everything to do with creation, destruction, and reference handling
of drm_fbs to a new file.

Signed-off-by: Daniel Stone <daniels@collabora.com>
2019-06-26 23:08:36 +01:00

4604 lines
125 KiB
C

/*
* Copyright © 2008-2011 Kristian Høgsberg
* Copyright © 2011 Intel Corporation
* Copyright © 2017, 2018 Collabora, Ltd.
* Copyright © 2017, 2018 General Electric Company
* Copyright (c) 2018 DisplayLink (UK) Ltd.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "config.h"
#include <errno.h>
#include <stdint.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <linux/input.h>
#include <linux/vt.h>
#include <assert.h>
#include <sys/mman.h>
#include <dlfcn.h>
#include <time.h>
#include <xf86drm.h>
#include <xf86drmMode.h>
#include <drm_fourcc.h>
#include <gbm.h>
#include <libudev.h>
#include <libweston/libweston.h>
#include <libweston/backend-drm.h>
#include <libweston/weston-debug.h>
#include "drm-internal.h"
#include "shared/helpers.h"
#include "shared/timespec-util.h"
#include "renderer-gl/gl-renderer.h"
#include "weston-egl-ext.h"
#include "pixman-renderer.h"
#include "pixel-formats.h"
#include "libbacklight.h"
#include "libinput-seat.h"
#include "launcher-util.h"
#include "vaapi-recorder.h"
#include "presentation-time-server-protocol.h"
#include "linux-dmabuf.h"
#include "linux-dmabuf-unstable-v1-server-protocol.h"
#include "linux-explicit-synchronization.h"
/**
* Mode for drm_output_state_duplicate.
*/
enum drm_output_state_duplicate_mode {
DRM_OUTPUT_STATE_CLEAR_PLANES, /**< reset all planes to off */
DRM_OUTPUT_STATE_PRESERVE_PLANES, /**< preserve plane state */
};
enum drm_output_propose_state_mode {
DRM_OUTPUT_PROPOSE_STATE_MIXED, /**< mix renderer & planes */
DRM_OUTPUT_PROPOSE_STATE_RENDERER_ONLY, /**< only assign to renderer & cursor */
DRM_OUTPUT_PROPOSE_STATE_PLANES_ONLY, /**< no renderer use, only planes */
};
static const char *const drm_output_propose_state_mode_as_string[] = {
[DRM_OUTPUT_PROPOSE_STATE_MIXED] = "mixed state",
[DRM_OUTPUT_PROPOSE_STATE_RENDERER_ONLY] = "render-only state",
[DRM_OUTPUT_PROPOSE_STATE_PLANES_ONLY] = "plane-only state"
};
static struct gl_renderer_interface *gl_renderer;
static const char default_seat[] = "seat0";
static void
wl_array_remove_uint32(struct wl_array *array, uint32_t elm)
{
uint32_t *pos, *end;
end = (uint32_t *) ((char *) array->data + array->size);
wl_array_for_each(pos, array) {
if (*pos != elm)
continue;
array->size -= sizeof(*pos);
if (pos + 1 == end)
break;
memmove(pos, pos + 1, (char *) end - (char *) (pos + 1));
break;
}
}
static int
pageflip_timeout(void *data) {
/*
* Our timer just went off, that means we're not receiving drm
* page flip events anymore for that output. Let's gracefully exit
* weston with a return value so devs can debug what's going on.
*/
struct drm_output *output = data;
struct weston_compositor *compositor = output->base.compositor;
weston_log("Pageflip timeout reached on output %s, your "
"driver is probably buggy! Exiting.\n",
output->base.name);
weston_compositor_exit_with_code(compositor, EXIT_FAILURE);
return 0;
}
/* Creates the pageflip timer. Note that it isn't armed by default */
static int
drm_output_pageflip_timer_create(struct drm_output *output)
{
struct wl_event_loop *loop = NULL;
struct weston_compositor *ec = output->base.compositor;
loop = wl_display_get_event_loop(ec->wl_display);
assert(loop);
output->pageflip_timer = wl_event_loop_add_timer(loop,
pageflip_timeout,
output);
if (output->pageflip_timer == NULL) {
weston_log("creating drm pageflip timer failed: %s\n",
strerror(errno));
return -1;
}
return 0;
}
static void
drm_output_destroy(struct weston_output *output_base);
static void
drm_virtual_output_destroy(struct weston_output *output_base);
/**
* Returns true if the plane can be used on the given output for its current
* repaint cycle.
*/
static bool
drm_plane_is_available(struct drm_plane *plane, struct drm_output *output)
{
assert(plane->state_cur);
if (output->virtual)
return false;
/* The plane still has a request not yet completed by the kernel. */
if (!plane->state_cur->complete)
return false;
/* The plane is still active on another output. */
if (plane->state_cur->output && plane->state_cur->output != output)
return false;
/* Check whether the plane can be used with this CRTC; possible_crtcs
* is a bitmask of CRTC indices (pipe), rather than CRTC object ID. */
return !!(plane->possible_crtcs & (1 << output->pipe));
}
struct drm_output *
drm_output_find_by_crtc(struct drm_backend *b, uint32_t crtc_id)
{
struct drm_output *output;
wl_list_for_each(output, &b->compositor->output_list, base.link) {
if (output->crtc_id == crtc_id)
return output;
}
return NULL;
}
struct drm_head *
drm_head_find_by_connector(struct drm_backend *backend, uint32_t connector_id)
{
struct weston_head *base;
struct drm_head *head;
wl_list_for_each(base,
&backend->compositor->head_list, compositor_link) {
head = to_drm_head(base);
if (head->connector_id == connector_id)
return head;
}
return NULL;
}
/**
* Allocate a new, empty, plane state.
*/
static struct drm_plane_state *
drm_plane_state_alloc(struct drm_output_state *state_output,
struct drm_plane *plane)
{
struct drm_plane_state *state = zalloc(sizeof(*state));
assert(state);
state->output_state = state_output;
state->plane = plane;
state->in_fence_fd = -1;
pixman_region32_init(&state->damage);
/* Here we only add the plane state to the desired link, and not
* set the member. Having an output pointer set means that the
* plane will be displayed on the output; this won't be the case
* when we go to disable a plane. In this case, it must be part of
* the commit (and thus the output state), but the member must be
* NULL, as it will not be on any output when the state takes
* effect.
*/
if (state_output)
wl_list_insert(&state_output->plane_list, &state->link);
else
wl_list_init(&state->link);
return state;
}
/**
* Free an existing plane state. As a special case, the state will not
* normally be freed if it is the current state; see drm_plane_set_state.
*/
void
drm_plane_state_free(struct drm_plane_state *state, bool force)
{
if (!state)
return;
wl_list_remove(&state->link);
wl_list_init(&state->link);
state->output_state = NULL;
state->in_fence_fd = -1;
pixman_region32_fini(&state->damage);
if (force || state != state->plane->state_cur) {
drm_fb_unref(state->fb);
free(state);
}
}
/**
* Duplicate an existing plane state into a new plane state, storing it within
* the given output state. If the output state already contains a plane state
* for the drm_plane referenced by 'src', that plane state is freed first.
*/
static struct drm_plane_state *
drm_plane_state_duplicate(struct drm_output_state *state_output,
struct drm_plane_state *src)
{
struct drm_plane_state *dst = malloc(sizeof(*dst));
struct drm_plane_state *old, *tmp;
assert(src);
assert(dst);
*dst = *src;
wl_list_init(&dst->link);
wl_list_for_each_safe(old, tmp, &state_output->plane_list, link) {
/* Duplicating a plane state into the same output state, so
* it can replace itself with an identical copy of itself,
* makes no sense. */
assert(old != src);
if (old->plane == dst->plane)
drm_plane_state_free(old, false);
}
wl_list_insert(&state_output->plane_list, &dst->link);
if (src->fb)
dst->fb = drm_fb_ref(src->fb);
dst->output_state = state_output;
pixman_region32_init(&dst->damage);
dst->complete = false;
return dst;
}
/**
* Remove a plane state from an output state; if the plane was previously
* enabled, then replace it with a disabling state. This ensures that the
* output state was untouched from it was before the plane state was
* modified by the caller of this function.
*
* This is required as drm_output_state_get_plane may either allocate a
* new plane state, in which case this function will just perform a matching
* drm_plane_state_free, or it may instead repurpose an existing disabling
* state (if the plane was previously active), in which case this function
* will reset it.
*/
static void
drm_plane_state_put_back(struct drm_plane_state *state)
{
struct drm_output_state *state_output;
struct drm_plane *plane;
if (!state)
return;
state_output = state->output_state;
plane = state->plane;
drm_plane_state_free(state, false);
/* Plane was previously disabled; no need to keep this temporary
* state around. */
if (!plane->state_cur->fb)
return;
(void) drm_plane_state_alloc(state_output, plane);
}
/**
* Given a weston_view, fill the drm_plane_state's co-ordinates to display on
* a given plane.
*/
static bool
drm_plane_state_coords_for_view(struct drm_plane_state *state,
struct weston_view *ev)
{
struct drm_output *output = state->output;
struct weston_buffer *buffer = ev->surface->buffer_ref.buffer;
pixman_region32_t dest_rect, src_rect;
pixman_box32_t *box, tbox;
float sxf1, syf1, sxf2, syf2;
if (!drm_view_transform_supported(ev, &output->base))
return false;
/* Update the base weston_plane co-ordinates. */
box = pixman_region32_extents(&ev->transform.boundingbox);
state->plane->base.x = box->x1;
state->plane->base.y = box->y1;
/* First calculate the destination co-ordinates by taking the
* area of the view which is visible on this output, performing any
* transforms to account for output rotation and scale as necessary. */
pixman_region32_init(&dest_rect);
pixman_region32_intersect(&dest_rect, &ev->transform.boundingbox,
&output->base.region);
pixman_region32_translate(&dest_rect, -output->base.x, -output->base.y);
box = pixman_region32_extents(&dest_rect);
tbox = weston_transformed_rect(output->base.width,
output->base.height,
output->base.transform,
output->base.current_scale,
*box);
state->dest_x = tbox.x1;
state->dest_y = tbox.y1;
state->dest_w = tbox.x2 - tbox.x1;
state->dest_h = tbox.y2 - tbox.y1;
pixman_region32_fini(&dest_rect);
/* Now calculate the source rectangle, by finding the extents of the
* view, and working backwards to source co-ordinates. */
pixman_region32_init(&src_rect);
pixman_region32_intersect(&src_rect, &ev->transform.boundingbox,
&output->base.region);
box = pixman_region32_extents(&src_rect);
weston_view_from_global_float(ev, box->x1, box->y1, &sxf1, &syf1);
weston_surface_to_buffer_float(ev->surface, sxf1, syf1, &sxf1, &syf1);
weston_view_from_global_float(ev, box->x2, box->y2, &sxf2, &syf2);
weston_surface_to_buffer_float(ev->surface, sxf2, syf2, &sxf2, &syf2);
pixman_region32_fini(&src_rect);
/* Buffer transforms may mean that x2 is to the left of x1, and/or that
* y2 is above y1. */
if (sxf2 < sxf1) {
double tmp = sxf1;
sxf1 = sxf2;
sxf2 = tmp;
}
if (syf2 < syf1) {
double tmp = syf1;
syf1 = syf2;
syf2 = tmp;
}
/* Shift from S23.8 wl_fixed to U16.16 KMS fixed-point encoding. */
state->src_x = wl_fixed_from_double(sxf1) << 8;
state->src_y = wl_fixed_from_double(syf1) << 8;
state->src_w = wl_fixed_from_double(sxf2 - sxf1) << 8;
state->src_h = wl_fixed_from_double(syf2 - syf1) << 8;
/* Clamp our source co-ordinates to surface bounds; it's possible
* for intermediate translations to give us slightly incorrect
* co-ordinates if we have, for example, multiple zooming
* transformations. View bounding boxes are also explicitly rounded
* greedily. */
if (state->src_x < 0)
state->src_x = 0;
if (state->src_y < 0)
state->src_y = 0;
if (state->src_w > (uint32_t) ((buffer->width << 16) - state->src_x))
state->src_w = (buffer->width << 16) - state->src_x;
if (state->src_h > (uint32_t) ((buffer->height << 16) - state->src_y))
state->src_h = (buffer->height << 16) - state->src_y;
return true;
}
/**
* Return a plane state from a drm_output_state.
*/
struct drm_plane_state *
drm_output_state_get_existing_plane(struct drm_output_state *state_output,
struct drm_plane *plane)
{
struct drm_plane_state *ps;
wl_list_for_each(ps, &state_output->plane_list, link) {
if (ps->plane == plane)
return ps;
}
return NULL;
}
/**
* Return a plane state from a drm_output_state, either existing or
* freshly allocated.
*/
static struct drm_plane_state *
drm_output_state_get_plane(struct drm_output_state *state_output,
struct drm_plane *plane)
{
struct drm_plane_state *ps;
ps = drm_output_state_get_existing_plane(state_output, plane);
if (ps)
return ps;
return drm_plane_state_alloc(state_output, plane);
}
/**
* Allocate a new, empty drm_output_state. This should not generally be used
* in the repaint cycle; see drm_output_state_duplicate.
*/
static struct drm_output_state *
drm_output_state_alloc(struct drm_output *output,
struct drm_pending_state *pending_state)
{
struct drm_output_state *state = zalloc(sizeof(*state));
assert(state);
state->output = output;
state->dpms = WESTON_DPMS_OFF;
state->pending_state = pending_state;
if (pending_state)
wl_list_insert(&pending_state->output_list, &state->link);
else
wl_list_init(&state->link);
wl_list_init(&state->plane_list);
return state;
}
/**
* Duplicate an existing drm_output_state into a new one. This is generally
* used during the repaint cycle, to capture the existing state of an output
* and modify it to create a new state to be used.
*
* The mode determines whether the output will be reset to an a blank state,
* or an exact mirror of the current state.
*/
static struct drm_output_state *
drm_output_state_duplicate(struct drm_output_state *src,
struct drm_pending_state *pending_state,
enum drm_output_state_duplicate_mode plane_mode)
{
struct drm_output_state *dst = malloc(sizeof(*dst));
struct drm_plane_state *ps;
assert(dst);
/* Copy the whole structure, then individually modify the
* pending_state, as well as the list link into our pending
* state. */
*dst = *src;
dst->pending_state = pending_state;
if (pending_state)
wl_list_insert(&pending_state->output_list, &dst->link);
else
wl_list_init(&dst->link);
wl_list_init(&dst->plane_list);
wl_list_for_each(ps, &src->plane_list, link) {
/* Don't carry planes which are now disabled; these should be
* free for other outputs to reuse. */
if (!ps->output)
continue;
if (plane_mode == DRM_OUTPUT_STATE_CLEAR_PLANES)
(void) drm_plane_state_alloc(dst, ps->plane);
else
(void) drm_plane_state_duplicate(dst, ps);
}
return dst;
}
/**
* Free an unused drm_output_state.
*/
void
drm_output_state_free(struct drm_output_state *state)
{
struct drm_plane_state *ps, *next;
if (!state)
return;
wl_list_for_each_safe(ps, next, &state->plane_list, link)
drm_plane_state_free(ps, false);
wl_list_remove(&state->link);
free(state);
}
/**
* Get output state to disable output
*
* Returns a pointer to an output_state object which can be used to disable
* an output (e.g. DPMS off).
*
* @param pending_state The pending state object owning this update
* @param output The output to disable
* @returns A drm_output_state to disable the output
*/
static struct drm_output_state *
drm_output_get_disable_state(struct drm_pending_state *pending_state,
struct drm_output *output)
{
struct drm_output_state *output_state;
output_state = drm_output_state_duplicate(output->state_cur,
pending_state,
DRM_OUTPUT_STATE_CLEAR_PLANES);
output_state->dpms = WESTON_DPMS_OFF;
return output_state;
}
/**
* Allocate a new drm_pending_state
*
* Allocate a new, empty, 'pending state' structure to be used across a
* repaint cycle or similar.
*
* @param backend DRM backend
* @returns Newly-allocated pending state structure
*/
static struct drm_pending_state *
drm_pending_state_alloc(struct drm_backend *backend)
{
struct drm_pending_state *ret;
ret = calloc(1, sizeof(*ret));
if (!ret)
return NULL;
ret->backend = backend;
wl_list_init(&ret->output_list);
return ret;
}
/**
* Free a drm_pending_state structure
*
* Frees a pending_state structure, as well as any output_states connected
* to this pending state.
*
* @param pending_state Pending state structure to free
*/
void
drm_pending_state_free(struct drm_pending_state *pending_state)
{
struct drm_output_state *output_state, *tmp;
if (!pending_state)
return;
wl_list_for_each_safe(output_state, tmp, &pending_state->output_list,
link) {
drm_output_state_free(output_state);
}
free(pending_state);
}
/**
* Find an output state in a pending state
*
* Given a pending_state structure, find the output_state for a particular
* output.
*
* @param pending_state Pending state structure to search
* @param output Output to find state for
* @returns Output state if present, or NULL if not
*/
static struct drm_output_state *
drm_pending_state_get_output(struct drm_pending_state *pending_state,
struct drm_output *output)
{
struct drm_output_state *output_state;
wl_list_for_each(output_state, &pending_state->output_list, link) {
if (output_state->output == output)
return output_state;
}
return NULL;
}
/**
* Mark a drm_output_state (the output's last state) as complete. This handles
* any post-completion actions such as updating the repaint timer, disabling the
* output, and finally freeing the state.
*/
void
drm_output_update_complete(struct drm_output *output, uint32_t flags,
unsigned int sec, unsigned int usec)
{
struct drm_backend *b = to_drm_backend(output->base.compositor);
struct drm_plane_state *ps;
struct timespec ts;
/* Stop the pageflip timer instead of rearming it here */
if (output->pageflip_timer)
wl_event_source_timer_update(output->pageflip_timer, 0);
wl_list_for_each(ps, &output->state_cur->plane_list, link)
ps->complete = true;
drm_output_state_free(output->state_last);
output->state_last = NULL;
if (output->destroy_pending) {
output->destroy_pending = 0;
output->disable_pending = 0;
output->dpms_off_pending = 0;
drm_output_destroy(&output->base);
return;
} else if (output->disable_pending) {
output->disable_pending = 0;
output->dpms_off_pending = 0;
weston_output_disable(&output->base);
return;
} else if (output->dpms_off_pending) {
struct drm_pending_state *pending = drm_pending_state_alloc(b);
output->dpms_off_pending = 0;
drm_output_get_disable_state(pending, output);
drm_pending_state_apply_sync(pending);
} else if (output->state_cur->dpms == WESTON_DPMS_OFF &&
output->base.repaint_status != REPAINT_AWAITING_COMPLETION) {
/* DPMS can happen to us either in the middle of a repaint
* cycle (when we have painted fresh content, only to throw it
* away for DPMS off), or at any other random point. If the
* latter is true, then we cannot go through finish_frame,
* because the repaint machinery does not expect this. */
return;
}
ts.tv_sec = sec;
ts.tv_nsec = usec * 1000;
weston_output_finish_frame(&output->base, &ts, flags);
/* We can't call this from frame_notify, because the output's
* repaint needed flag is cleared just after that */
if (output->recorder)
weston_output_schedule_repaint(&output->base);
}
static struct drm_plane_state *
drm_output_prepare_scanout_view(struct drm_output_state *output_state,
struct weston_view *ev,
enum drm_output_propose_state_mode mode)
{
struct drm_output *output = output_state->output;
struct drm_backend *b = to_drm_backend(output->base.compositor);
struct drm_plane *scanout_plane = output->scanout_plane;
struct drm_plane_state *state;
struct drm_fb *fb;
pixman_box32_t *extents;
assert(!b->sprites_are_broken);
assert(b->atomic_modeset);
assert(mode == DRM_OUTPUT_PROPOSE_STATE_PLANES_ONLY);
/* Check the view spans exactly the output size, calculated in the
* logical co-ordinate space. */
extents = pixman_region32_extents(&ev->transform.boundingbox);
if (extents->x1 != output->base.x ||
extents->y1 != output->base.y ||
extents->x2 != output->base.x + output->base.width ||
extents->y2 != output->base.y + output->base.height)
return NULL;
/* If the surface buffer has an in-fence fd, but the plane doesn't
* support fences, we can't place the buffer on this plane. */
if (ev->surface->acquire_fence_fd >= 0 &&
scanout_plane->props[WDRM_PLANE_IN_FENCE_FD].prop_id == 0)
return NULL;
fb = drm_fb_get_from_view(output_state, ev);
if (!fb) {
drm_debug(b, "\t\t\t\t[scanout] not placing view %p on scanout: "
" couldn't get fb\n", ev);
return NULL;
}
state = drm_output_state_get_plane(output_state, scanout_plane);
/* The only way we can already have a buffer in the scanout plane is
* if we are in mixed mode, or if a client buffer has already been
* placed into scanout. The former case will never call into here,
* and in the latter case, the view must have been marked as occluded,
* meaning we should never have ended up here. */
assert(!state->fb);
state->fb = fb;
state->ev = ev;
state->output = output;
if (!drm_plane_state_coords_for_view(state, ev))
goto err;
if (state->dest_x != 0 || state->dest_y != 0 ||
state->dest_w != (unsigned) output->base.current_mode->width ||
state->dest_h != (unsigned) output->base.current_mode->height)
goto err;
state->in_fence_fd = ev->surface->acquire_fence_fd;
/* In plane-only mode, we don't need to test the state now, as we
* will only test it once at the end. */
return state;
err:
drm_plane_state_put_back(state);
return NULL;
}
static struct drm_fb *
drm_output_render_gl(struct drm_output_state *state, pixman_region32_t *damage)
{
struct drm_output *output = state->output;
struct drm_backend *b = to_drm_backend(output->base.compositor);
struct gbm_bo *bo;
struct drm_fb *ret;
output->base.compositor->renderer->repaint_output(&output->base,
damage);
bo = gbm_surface_lock_front_buffer(output->gbm_surface);
if (!bo) {
weston_log("failed to lock front buffer: %s\n",
strerror(errno));
return NULL;
}
/* The renderer always produces an opaque image. */
ret = drm_fb_get_from_bo(bo, b, true, BUFFER_GBM_SURFACE);
if (!ret) {
weston_log("failed to get drm_fb for bo\n");
gbm_surface_release_buffer(output->gbm_surface, bo);
return NULL;
}
ret->gbm_surface = output->gbm_surface;
return ret;
}
static struct drm_fb *
drm_output_render_pixman(struct drm_output_state *state,
pixman_region32_t *damage)
{
struct drm_output *output = state->output;
struct weston_compositor *ec = output->base.compositor;
output->current_image ^= 1;
pixman_renderer_output_set_buffer(&output->base,
output->image[output->current_image]);
pixman_renderer_output_set_hw_extra_damage(&output->base,
&output->previous_damage);
ec->renderer->repaint_output(&output->base, damage);
pixman_region32_copy(&output->previous_damage, damage);
return drm_fb_ref(output->dumb[output->current_image]);
}
static void
drm_output_render(struct drm_output_state *state, pixman_region32_t *damage)
{
struct drm_output *output = state->output;
struct weston_compositor *c = output->base.compositor;
struct drm_plane_state *scanout_state;
struct drm_plane *scanout_plane = output->scanout_plane;
struct drm_backend *b = to_drm_backend(c);
struct drm_fb *fb;
/* If we already have a client buffer promoted to scanout, then we don't
* want to render. */
scanout_state = drm_output_state_get_plane(state,
output->scanout_plane);
if (scanout_state->fb)
return;
if (!pixman_region32_not_empty(damage) &&
scanout_plane->state_cur->fb &&
(scanout_plane->state_cur->fb->type == BUFFER_GBM_SURFACE ||
scanout_plane->state_cur->fb->type == BUFFER_PIXMAN_DUMB) &&
scanout_plane->state_cur->fb->width ==
output->base.current_mode->width &&
scanout_plane->state_cur->fb->height ==
output->base.current_mode->height) {
fb = drm_fb_ref(scanout_plane->state_cur->fb);
} else if (b->use_pixman) {
fb = drm_output_render_pixman(state, damage);
} else {
fb = drm_output_render_gl(state, damage);
}
if (!fb) {
drm_plane_state_put_back(scanout_state);
return;
}
scanout_state->fb = fb;
scanout_state->output = output;
scanout_state->src_x = 0;
scanout_state->src_y = 0;
scanout_state->src_w = output->base.current_mode->width << 16;
scanout_state->src_h = output->base.current_mode->height << 16;
scanout_state->dest_x = 0;
scanout_state->dest_y = 0;
scanout_state->dest_w = scanout_state->src_w >> 16;
scanout_state->dest_h = scanout_state->src_h >> 16;
pixman_region32_copy(&scanout_state->damage, damage);
if (output->base.zoom.active) {
weston_matrix_transform_region(&scanout_state->damage,
&output->base.matrix,
&scanout_state->damage);
} else {
pixman_region32_translate(&scanout_state->damage,
-output->base.x, -output->base.y);
weston_transformed_region(output->base.width,
output->base.height,
output->base.transform,
output->base.current_scale,
&scanout_state->damage,
&scanout_state->damage);
}
pixman_region32_subtract(&c->primary_plane.damage,
&c->primary_plane.damage, damage);
}
static int
drm_output_repaint(struct weston_output *output_base,
pixman_region32_t *damage,
void *repaint_data)
{
struct drm_pending_state *pending_state = repaint_data;
struct drm_output *output = to_drm_output(output_base);
struct drm_output_state *state = NULL;
struct drm_plane_state *scanout_state;
assert(!output->virtual);
if (output->disable_pending || output->destroy_pending)
goto err;
assert(!output->state_last);
/* If planes have been disabled in the core, we might not have
* hit assign_planes at all, so might not have valid output state
* here. */
state = drm_pending_state_get_output(pending_state, output);
if (!state)
state = drm_output_state_duplicate(output->state_cur,
pending_state,
DRM_OUTPUT_STATE_CLEAR_PLANES);
state->dpms = WESTON_DPMS_ON;
drm_output_render(state, damage);
scanout_state = drm_output_state_get_plane(state,
output->scanout_plane);
if (!scanout_state || !scanout_state->fb)
goto err;
return 0;
err:
drm_output_state_free(state);
return -1;
}
/* Determine the type of vblank synchronization to use for the output.
*
* The pipe parameter indicates which CRTC is in use. Knowing this, we
* can determine which vblank sequence type to use for it. Traditional
* cards had only two CRTCs, with CRTC 0 using no special flags, and
* CRTC 1 using DRM_VBLANK_SECONDARY. The first bit of the pipe
* parameter indicates this.
*
* Bits 1-5 of the pipe parameter are 5 bit wide pipe number between
* 0-31. If this is non-zero it indicates we're dealing with a
* multi-gpu situation and we need to calculate the vblank sync
* using DRM_BLANK_HIGH_CRTC_MASK.
*/
static unsigned int
drm_waitvblank_pipe(struct drm_output *output)
{
if (output->pipe > 1)
return (output->pipe << DRM_VBLANK_HIGH_CRTC_SHIFT) &
DRM_VBLANK_HIGH_CRTC_MASK;
else if (output->pipe > 0)
return DRM_VBLANK_SECONDARY;
else
return 0;
}
static void
drm_output_start_repaint_loop(struct weston_output *output_base)
{
struct drm_output *output = to_drm_output(output_base);
struct drm_pending_state *pending_state;
struct drm_plane *scanout_plane = output->scanout_plane;
struct drm_backend *backend =
to_drm_backend(output_base->compositor);
struct timespec ts, tnow;
struct timespec vbl2now;
int64_t refresh_nsec;
int ret;
drmVBlank vbl = {
.request.type = DRM_VBLANK_RELATIVE,
.request.sequence = 0,
.request.signal = 0,
};
if (output->disable_pending || output->destroy_pending)
return;
if (!output->scanout_plane->state_cur->fb) {
/* We can't page flip if there's no mode set */
goto finish_frame;
}
/* Need to smash all state in from scratch; current timings might not
* be what we want, page flip might not work, etc.
*/
if (backend->state_invalid)
goto finish_frame;
assert(scanout_plane->state_cur->output == output);
/* Try to get current msc and timestamp via instant query */
vbl.request.type |= drm_waitvblank_pipe(output);
ret = drmWaitVBlank(backend->drm.fd, &vbl);
/* Error ret or zero timestamp means failure to get valid timestamp */
if ((ret == 0) && (vbl.reply.tval_sec > 0 || vbl.reply.tval_usec > 0)) {
ts.tv_sec = vbl.reply.tval_sec;
ts.tv_nsec = vbl.reply.tval_usec * 1000;
/* Valid timestamp for most recent vblank - not stale?
* Stale ts could happen on Linux 3.17+, so make sure it
* is not older than 1 refresh duration since now.
*/
weston_compositor_read_presentation_clock(backend->compositor,
&tnow);
timespec_sub(&vbl2now, &tnow, &ts);
refresh_nsec =
millihz_to_nsec(output->base.current_mode->refresh);
if (timespec_to_nsec(&vbl2now) < refresh_nsec) {
drm_output_update_msc(output, vbl.reply.sequence);
weston_output_finish_frame(output_base, &ts,
WP_PRESENTATION_FEEDBACK_INVALID);
return;
}
}
/* Immediate query didn't provide valid timestamp.
* Use pageflip fallback.
*/
assert(!output->page_flip_pending);
assert(!output->state_last);
pending_state = drm_pending_state_alloc(backend);
drm_output_state_duplicate(output->state_cur, pending_state,
DRM_OUTPUT_STATE_PRESERVE_PLANES);
ret = drm_pending_state_apply(pending_state);
if (ret != 0) {
weston_log("applying repaint-start state failed: %s\n",
strerror(errno));
goto finish_frame;
}
return;
finish_frame:
/* if we cannot page-flip, immediately finish frame */
weston_output_finish_frame(output_base, NULL,
WP_PRESENTATION_FEEDBACK_INVALID);
}
/**
* Begin a new repaint cycle
*
* Called by the core compositor at the beginning of a repaint cycle. Creates
* a new pending_state structure to own any output state created by individual
* output repaint functions until the repaint is flushed or cancelled.
*/
static void *
drm_repaint_begin(struct weston_compositor *compositor)
{
struct drm_backend *b = to_drm_backend(compositor);
struct drm_pending_state *ret;
ret = drm_pending_state_alloc(b);
b->repaint_data = ret;
if (weston_log_scope_is_enabled(b->debug)) {
char *dbg = weston_compositor_print_scene_graph(compositor);
drm_debug(b, "[repaint] Beginning repaint; pending_state %p\n",
ret);
drm_debug(b, "%s", dbg);
free(dbg);
}
return ret;
}
/**
* Flush a repaint set
*
* Called by the core compositor when a repaint cycle has been completed
* and should be flushed. Frees the pending state, transitioning ownership
* of the output state from the pending state, to the update itself. When
* the update completes (see drm_output_update_complete), the output
* state will be freed.
*/
static void
drm_repaint_flush(struct weston_compositor *compositor, void *repaint_data)
{
struct drm_backend *b = to_drm_backend(compositor);
struct drm_pending_state *pending_state = repaint_data;
drm_pending_state_apply(pending_state);
drm_debug(b, "[repaint] flushed pending_state %p\n", pending_state);
b->repaint_data = NULL;
}
/**
* Cancel a repaint set
*
* Called by the core compositor when a repaint has finished, so the data
* held across the repaint cycle should be discarded.
*/
static void
drm_repaint_cancel(struct weston_compositor *compositor, void *repaint_data)
{
struct drm_backend *b = to_drm_backend(compositor);
struct drm_pending_state *pending_state = repaint_data;
drm_pending_state_free(pending_state);
drm_debug(b, "[repaint] cancel pending_state %p\n", pending_state);
b->repaint_data = NULL;
}
static struct drm_plane_state *
drm_output_prepare_overlay_view(struct drm_output_state *output_state,
struct weston_view *ev,
enum drm_output_propose_state_mode mode)
{
struct drm_output *output = output_state->output;
struct weston_compositor *ec = output->base.compositor;
struct drm_backend *b = to_drm_backend(ec);
struct drm_plane *p;
struct drm_plane_state *state = NULL;
struct drm_fb *fb;
unsigned int i;
int ret;
enum {
NO_PLANES,
NO_PLANES_WITH_FORMAT,
NO_PLANES_ACCEPTED,
PLACED_ON_PLANE,
} availability = NO_PLANES;
assert(!b->sprites_are_broken);
assert(b->atomic_modeset);
fb = drm_fb_get_from_view(output_state, ev);
if (!fb) {
drm_debug(b, "\t\t\t\t[overlay] not placing view %p on overlay: "
" couldn't get fb\n", ev);
return NULL;
}
wl_list_for_each(p, &b->plane_list, link) {
if (p->type != WDRM_PLANE_TYPE_OVERLAY)
continue;
if (!drm_plane_is_available(p, output))
continue;
state = drm_output_state_get_plane(output_state, p);
if (state->fb) {
state = NULL;
continue;
}
if (availability == NO_PLANES)
availability = NO_PLANES_WITH_FORMAT;
/* Check whether the format is supported */
for (i = 0; i < p->count_formats; i++) {
unsigned int j;
if (p->formats[i].format != fb->format->format)
continue;
if (fb->modifier == DRM_FORMAT_MOD_INVALID)
break;
for (j = 0; j < p->formats[i].count_modifiers; j++) {
if (p->formats[i].modifiers[j] == fb->modifier)
break;
}
if (j != p->formats[i].count_modifiers)
break;
}
if (i == p->count_formats) {
drm_plane_state_put_back(state);
state = NULL;
continue;
}
if (availability == NO_PLANES_WITH_FORMAT)
availability = NO_PLANES_ACCEPTED;
state->ev = ev;
state->output = output;
if (!drm_plane_state_coords_for_view(state, ev)) {
drm_debug(b, "\t\t\t\t[overlay] not placing view %p on overlay: "
"unsuitable transform\n", ev);
drm_plane_state_put_back(state);
state = NULL;
continue;
}
/* If the surface buffer has an in-fence fd, but the plane
* doesn't support fences, we can't place the buffer on this
* plane. */
if (ev->surface->acquire_fence_fd >= 0 &&
p->props[WDRM_PLANE_IN_FENCE_FD].prop_id == 0) {
drm_debug(b, "\t\t\t\t[overlay] not placing view %p on overlay: "
"no in-fence support\n", ev);
drm_plane_state_put_back(state);
state = NULL;
continue;
}
/* We hold one reference for the lifetime of this function;
* from calling drm_fb_get_from_view, to the out label where
* we unconditionally drop the reference. So, we take another
* reference here to live within the state. */
state->fb = drm_fb_ref(fb);
state->in_fence_fd = ev->surface->acquire_fence_fd;
/* In planes-only mode, we don't have an incremental state to
* test against, so we just hope it'll work. */
if (mode == DRM_OUTPUT_PROPOSE_STATE_PLANES_ONLY) {
drm_debug(b, "\t\t\t\t[overlay] provisionally placing "
"view %p on overlay %lu in planes-only mode\n",
ev, (unsigned long) p->plane_id);
availability = PLACED_ON_PLANE;
goto out;
}
ret = drm_pending_state_test(output_state->pending_state);
if (ret == 0) {
drm_debug(b, "\t\t\t\t[overlay] provisionally placing "
"view %p on overlay %d in mixed mode\n",
ev, p->plane_id);
availability = PLACED_ON_PLANE;
goto out;
}
drm_debug(b, "\t\t\t\t[overlay] not placing view %p on overlay %lu "
"in mixed mode: kernel test failed\n",
ev, (unsigned long) p->plane_id);
drm_plane_state_put_back(state);
state = NULL;
}
switch (availability) {
case NO_PLANES:
drm_debug(b, "\t\t\t\t[overlay] not placing view %p on overlay: "
"no free overlay planes\n", ev);
break;
case NO_PLANES_WITH_FORMAT:
drm_debug(b, "\t\t\t\t[overlay] not placing view %p on overlay: "
"no free overlay planes matching format %s (0x%lx) "
"modifier 0x%llx\n",
ev, fb->format->drm_format_name,
(unsigned long) fb->format,
(unsigned long long) fb->modifier);
break;
case NO_PLANES_ACCEPTED:
case PLACED_ON_PLANE:
break;
}
out:
drm_fb_unref(fb);
return state;
}
/**
* Update the image for the current cursor surface
*
* @param plane_state DRM cursor plane state
* @param ev Source view for cursor
*/
static void
cursor_bo_update(struct drm_plane_state *plane_state, struct weston_view *ev)
{
struct drm_backend *b = plane_state->plane->backend;
struct gbm_bo *bo = plane_state->fb->bo;
struct weston_buffer *buffer = ev->surface->buffer_ref.buffer;
uint32_t buf[b->cursor_width * b->cursor_height];
int32_t stride;
uint8_t *s;
int i;
assert(buffer && buffer->shm_buffer);
assert(buffer->shm_buffer == wl_shm_buffer_get(buffer->resource));
assert(buffer->width <= b->cursor_width);
assert(buffer->height <= b->cursor_height);
memset(buf, 0, sizeof buf);
stride = wl_shm_buffer_get_stride(buffer->shm_buffer);
s = wl_shm_buffer_get_data(buffer->shm_buffer);
wl_shm_buffer_begin_access(buffer->shm_buffer);
for (i = 0; i < buffer->height; i++)
memcpy(buf + i * b->cursor_width,
s + i * stride,
buffer->width * 4);
wl_shm_buffer_end_access(buffer->shm_buffer);
if (gbm_bo_write(bo, buf, sizeof buf) < 0)
weston_log("failed update cursor: %s\n", strerror(errno));
}
static struct drm_plane_state *
drm_output_prepare_cursor_view(struct drm_output_state *output_state,
struct weston_view *ev)
{
struct drm_output *output = output_state->output;
struct drm_backend *b = to_drm_backend(output->base.compositor);
struct drm_plane *plane = output->cursor_plane;
struct drm_plane_state *plane_state;
struct wl_shm_buffer *shmbuf;
bool needs_update = false;
assert(!b->cursors_are_broken);
if (!plane)
return NULL;
if (!plane->state_cur->complete)
return NULL;
if (plane->state_cur->output && plane->state_cur->output != output)
return NULL;
/* We use GBM to import SHM buffers. */
if (b->gbm == NULL)
return NULL;
if (ev->surface->buffer_ref.buffer == NULL) {
drm_debug(b, "\t\t\t\t[cursor] not assigning view %p to cursor plane "
"(no buffer available)\n", ev);
return NULL;
}
shmbuf = wl_shm_buffer_get(ev->surface->buffer_ref.buffer->resource);
if (!shmbuf) {
drm_debug(b, "\t\t\t\t[cursor] not assigning view %p to cursor plane "
"(buffer isn't SHM)\n", ev);
return NULL;
}
if (wl_shm_buffer_get_format(shmbuf) != WL_SHM_FORMAT_ARGB8888) {
drm_debug(b, "\t\t\t\t[cursor] not assigning view %p to cursor plane "
"(format 0x%lx unsuitable)\n",
ev, (unsigned long) wl_shm_buffer_get_format(shmbuf));
return NULL;
}
plane_state =
drm_output_state_get_plane(output_state, output->cursor_plane);
if (plane_state && plane_state->fb)
return NULL;
/* We can't scale with the legacy API, and we don't try to account for
* simple cropping/translation in cursor_bo_update. */
plane_state->output = output;
if (!drm_plane_state_coords_for_view(plane_state, ev))
goto err;
if (plane_state->src_x != 0 || plane_state->src_y != 0 ||
plane_state->src_w > (unsigned) b->cursor_width << 16 ||
plane_state->src_h > (unsigned) b->cursor_height << 16 ||
plane_state->src_w != plane_state->dest_w << 16 ||
plane_state->src_h != plane_state->dest_h << 16) {
drm_debug(b, "\t\t\t\t[cursor] not assigning view %p to cursor plane "
"(positioning requires cropping or scaling)\n", ev);
goto err;
}
/* Since we're setting plane state up front, we need to work out
* whether or not we need to upload a new cursor. We can't use the
* plane damage, since the planes haven't actually been calculated
* yet: instead try to figure it out directly. KMS cursor planes are
* pretty unique here, in that they lie partway between a Weston plane
* (direct scanout) and a renderer. */
if (ev != output->cursor_view ||
pixman_region32_not_empty(&ev->surface->damage)) {
output->current_cursor++;
output->current_cursor =
output->current_cursor %
ARRAY_LENGTH(output->gbm_cursor_fb);
needs_update = true;
}
output->cursor_view = ev;
plane_state->ev = ev;
plane_state->fb =
drm_fb_ref(output->gbm_cursor_fb[output->current_cursor]);
if (needs_update) {
drm_debug(b, "\t\t\t\t[cursor] copying new content to cursor BO\n");
cursor_bo_update(plane_state, ev);
}
/* The cursor API is somewhat special: in cursor_bo_update(), we upload
* a buffer which is always cursor_width x cursor_height, even if the
* surface we want to promote is actually smaller than this. Manually
* mangle the plane state to deal with this. */
plane_state->src_w = b->cursor_width << 16;
plane_state->src_h = b->cursor_height << 16;
plane_state->dest_w = b->cursor_width;
plane_state->dest_h = b->cursor_height;
drm_debug(b, "\t\t\t\t[cursor] provisionally assigned view %p to cursor\n",
ev);
return plane_state;
err:
drm_plane_state_put_back(plane_state);
return NULL;
}
static struct drm_output_state *
drm_output_propose_state(struct weston_output *output_base,
struct drm_pending_state *pending_state,
enum drm_output_propose_state_mode mode)
{
struct drm_output *output = to_drm_output(output_base);
struct drm_backend *b = to_drm_backend(output->base.compositor);
struct drm_output_state *state;
struct drm_plane_state *scanout_state = NULL;
struct weston_view *ev;
pixman_region32_t surface_overlap, renderer_region, occluded_region;
bool planes_ok = (mode != DRM_OUTPUT_PROPOSE_STATE_RENDERER_ONLY);
bool renderer_ok = (mode != DRM_OUTPUT_PROPOSE_STATE_PLANES_ONLY);
int ret;
assert(!output->state_last);
state = drm_output_state_duplicate(output->state_cur,
pending_state,
DRM_OUTPUT_STATE_CLEAR_PLANES);
/* We implement mixed mode by progressively creating and testing
* incremental states, of scanout + overlay + cursor. Since we
* walk our views top to bottom, the scanout plane is last, however
* we always need it in our scene for the test modeset to be
* meaningful. To do this, we steal a reference to the last
* renderer framebuffer we have, if we think it's basically
* compatible. If we don't have that, then we conservatively fall
* back to only using the renderer for this repaint. */
if (mode == DRM_OUTPUT_PROPOSE_STATE_MIXED) {
struct drm_plane *plane = output->scanout_plane;
struct drm_fb *scanout_fb = plane->state_cur->fb;
if (!scanout_fb ||
(scanout_fb->type != BUFFER_GBM_SURFACE &&
scanout_fb->type != BUFFER_PIXMAN_DUMB)) {
drm_debug(b, "\t\t[state] cannot propose mixed mode: "
"for output %s (%lu): no previous renderer "
"fb\n",
output->base.name,
(unsigned long) output->base.id);
drm_output_state_free(state);
return NULL;
}
if (scanout_fb->width != output_base->current_mode->width ||
scanout_fb->height != output_base->current_mode->height) {
drm_debug(b, "\t\t[state] cannot propose mixed mode "
"for output %s (%lu): previous fb has "
"different size\n",
output->base.name,
(unsigned long) output->base.id);
drm_output_state_free(state);
return NULL;
}
scanout_state = drm_plane_state_duplicate(state,
plane->state_cur);
drm_debug(b, "\t\t[state] using renderer FB ID %lu for mixed "
"mode for output %s (%lu)\n",
(unsigned long) scanout_fb->fb_id, output->base.name,
(unsigned long) output->base.id);
}
/*
* Find a surface for each sprite in the output using some heuristics:
* 1) size
* 2) frequency of update
* 3) opacity (though some hw might support alpha blending)
* 4) clipping (this can be fixed with color keys)
*
* The idea is to save on blitting since this should save power.
* If we can get a large video surface on the sprite for example,
* the main display surface may not need to update at all, and
* the client buffer can be used directly for the sprite surface
* as we do for flipping full screen surfaces.
*/
pixman_region32_init(&renderer_region);
pixman_region32_init(&occluded_region);
wl_list_for_each(ev, &output_base->compositor->view_list, link) {
struct drm_plane_state *ps = NULL;
bool force_renderer = false;
pixman_region32_t clipped_view;
bool totally_occluded = false;
bool overlay_occluded = false;
drm_debug(b, "\t\t\t[view] evaluating view %p for "
"output %s (%lu)\n",
ev, output->base.name,
(unsigned long) output->base.id);
/* If this view doesn't touch our output at all, there's no
* reason to do anything with it. */
if (!(ev->output_mask & (1u << output->base.id))) {
drm_debug(b, "\t\t\t\t[view] ignoring view %p "
"(not on our output)\n", ev);
continue;
}
/* We only assign planes to views which are exclusively present
* on our output. */
if (ev->output_mask != (1u << output->base.id)) {
drm_debug(b, "\t\t\t\t[view] not assigning view %p to plane "
"(on multiple outputs)\n", ev);
force_renderer = true;
}
if (!ev->surface->buffer_ref.buffer) {
drm_debug(b, "\t\t\t\t[view] not assigning view %p to plane "
"(no buffer available)\n", ev);
force_renderer = true;
}
/* Ignore views we know to be totally occluded. */
pixman_region32_init(&clipped_view);
pixman_region32_intersect(&clipped_view,
&ev->transform.boundingbox,
&output->base.region);
pixman_region32_init(&surface_overlap);
pixman_region32_subtract(&surface_overlap, &clipped_view,
&occluded_region);
totally_occluded = !pixman_region32_not_empty(&surface_overlap);
if (totally_occluded) {
drm_debug(b, "\t\t\t\t[view] ignoring view %p "
"(occluded on our output)\n", ev);
pixman_region32_fini(&surface_overlap);
pixman_region32_fini(&clipped_view);
continue;
}
/* Since we process views from top to bottom, we know that if
* the view intersects the calculated renderer region, it must
* be part of, or occluded by, it, and cannot go on a plane. */
pixman_region32_intersect(&surface_overlap, &renderer_region,
&clipped_view);
if (pixman_region32_not_empty(&surface_overlap)) {
drm_debug(b, "\t\t\t\t[view] not assigning view %p to plane "
"(occluded by renderer views)\n", ev);
force_renderer = true;
}
/* We do not control the stacking order of overlay planes;
* the scanout plane is strictly stacked bottom and the cursor
* plane top, but the ordering of overlay planes with respect
* to each other is undefined. Make sure we do not have two
* planes overlapping each other. */
pixman_region32_intersect(&surface_overlap, &occluded_region,
&clipped_view);
if (pixman_region32_not_empty(&surface_overlap)) {
drm_debug(b, "\t\t\t\t[view] not assigning view %p to plane "
"(occluded by other overlay planes)\n", ev);
overlay_occluded = true;
}
pixman_region32_fini(&surface_overlap);
/* The cursor plane is 'special' in the sense that we can still
* place it in the legacy API, and we gate that with a separate
* cursors_are_broken flag. */
if (!force_renderer && !overlay_occluded && !b->cursors_are_broken)
ps = drm_output_prepare_cursor_view(state, ev);
/* If sprites are disabled or the view is not fully opaque, we
* must put the view into the renderer - unless it has already
* been placed in the cursor plane, which can handle alpha. */
if (!ps && !planes_ok) {
drm_debug(b, "\t\t\t\t[view] not assigning view %p to plane "
"(precluded by mode)\n", ev);
force_renderer = true;
}
if (!ps && !weston_view_is_opaque(ev, &clipped_view)) {
drm_debug(b, "\t\t\t\t[view] not assigning view %p to plane "
"(view not fully opaque)\n", ev);
force_renderer = true;
}
/* Only try to place scanout surfaces in planes-only mode; in
* mixed mode, we have already failed to place a view on the
* scanout surface, forcing usage of the renderer on the
* scanout plane. */
if (!ps && !force_renderer && !renderer_ok)
ps = drm_output_prepare_scanout_view(state, ev, mode);
if (!ps && !overlay_occluded && !force_renderer)
ps = drm_output_prepare_overlay_view(state, ev, mode);
if (ps) {
/* If we have been assigned to an overlay or scanout
* plane, add this area to the occluded region, so
* other views are known to be behind it. The cursor
* plane, however, is special, in that it blends with
* the content underneath it: the area should neither
* be added to the renderer region nor the occluded
* region. */
if (ps->plane->type != WDRM_PLANE_TYPE_CURSOR) {
pixman_region32_union(&occluded_region,
&occluded_region,
&clipped_view);
pixman_region32_fini(&clipped_view);
}
continue;
}
/* We have been assigned to the primary (renderer) plane:
* check if this is OK, and add ourselves to the renderer
* region if so. */
if (!renderer_ok) {
drm_debug(b, "\t\t[view] failing state generation: "
"placing view %p to renderer not allowed\n",
ev);
pixman_region32_fini(&clipped_view);
goto err_region;
}
pixman_region32_union(&renderer_region,
&renderer_region,
&clipped_view);
pixman_region32_fini(&clipped_view);
}
pixman_region32_fini(&renderer_region);
pixman_region32_fini(&occluded_region);
/* In renderer-only mode, we can't test the state as we don't have a
* renderer buffer yet. */
if (mode == DRM_OUTPUT_PROPOSE_STATE_RENDERER_ONLY)
return state;
/* Check to see if this state will actually work. */
ret = drm_pending_state_test(state->pending_state);
if (ret != 0) {
drm_debug(b, "\t\t[view] failing state generation: "
"atomic test not OK\n");
goto err;
}
/* Counterpart to duplicating scanout state at the top of this
* function: if we have taken a renderer framebuffer and placed it in
* the pending state in order to incrementally test overlay planes,
* remove it now. */
if (mode == DRM_OUTPUT_PROPOSE_STATE_MIXED) {
assert(scanout_state->fb->type == BUFFER_GBM_SURFACE ||
scanout_state->fb->type == BUFFER_PIXMAN_DUMB);
drm_plane_state_put_back(scanout_state);
}
return state;
err_region:
pixman_region32_fini(&renderer_region);
pixman_region32_fini(&occluded_region);
err:
drm_output_state_free(state);
return NULL;
}
static const char *
drm_propose_state_mode_to_string(enum drm_output_propose_state_mode mode)
{
if (mode < 0 || mode >= ARRAY_LENGTH(drm_output_propose_state_mode_as_string))
return " unknown compositing mode";
return drm_output_propose_state_mode_as_string[mode];
}
static void
drm_assign_planes(struct weston_output *output_base, void *repaint_data)
{
struct drm_backend *b = to_drm_backend(output_base->compositor);
struct drm_pending_state *pending_state = repaint_data;
struct drm_output *output = to_drm_output(output_base);
struct drm_output_state *state = NULL;
struct drm_plane_state *plane_state;
struct weston_view *ev;
struct weston_plane *primary = &output_base->compositor->primary_plane;
enum drm_output_propose_state_mode mode = DRM_OUTPUT_PROPOSE_STATE_PLANES_ONLY;
drm_debug(b, "\t[repaint] preparing state for output %s (%lu)\n",
output_base->name, (unsigned long) output_base->id);
if (!b->sprites_are_broken && !output->virtual) {
drm_debug(b, "\t[repaint] trying planes-only build state\n");
state = drm_output_propose_state(output_base, pending_state, mode);
if (!state) {
drm_debug(b, "\t[repaint] could not build planes-only "
"state, trying mixed\n");
mode = DRM_OUTPUT_PROPOSE_STATE_MIXED;
state = drm_output_propose_state(output_base,
pending_state,
mode);
}
if (!state) {
drm_debug(b, "\t[repaint] could not build mixed-mode "
"state, trying renderer-only\n");
}
} else {
drm_debug(b, "\t[state] no overlay plane support\n");
}
if (!state) {
mode = DRM_OUTPUT_PROPOSE_STATE_RENDERER_ONLY;
state = drm_output_propose_state(output_base, pending_state,
mode);
}
assert(state);
drm_debug(b, "\t[repaint] Using %s composition\n",
drm_propose_state_mode_to_string(mode));
wl_list_for_each(ev, &output_base->compositor->view_list, link) {
struct drm_plane *target_plane = NULL;
/* If this view doesn't touch our output at all, there's no
* reason to do anything with it. */
if (!(ev->output_mask & (1u << output->base.id)))
continue;
/* Test whether this buffer can ever go into a plane:
* non-shm, or small enough to be a cursor.
*
* Also, keep a reference when using the pixman renderer.
* That makes it possible to do a seamless switch to the GL
* renderer and since the pixman renderer keeps a reference
* to the buffer anyway, there is no side effects.
*/
if (b->use_pixman ||
(ev->surface->buffer_ref.buffer &&
(!wl_shm_buffer_get(ev->surface->buffer_ref.buffer->resource) ||
(ev->surface->width <= b->cursor_width &&
ev->surface->height <= b->cursor_height))))
ev->surface->keep_buffer = true;
else
ev->surface->keep_buffer = false;
/* This is a bit unpleasant, but lacking a temporary place to
* hang a plane off the view, we have to do a nested walk.
* Our first-order iteration has to be planes rather than
* views, because otherwise we won't reset views which were
* previously on planes to being on the primary plane. */
wl_list_for_each(plane_state, &state->plane_list, link) {
if (plane_state->ev == ev) {
plane_state->ev = NULL;
target_plane = plane_state->plane;
break;
}
}
if (target_plane) {
drm_debug(b, "\t[repaint] view %p on %s plane %lu\n",
ev, plane_type_enums[target_plane->type].name,
(unsigned long) target_plane->plane_id);
weston_view_move_to_plane(ev, &target_plane->base);
} else {
drm_debug(b, "\t[repaint] view %p using renderer "
"composition\n", ev);
weston_view_move_to_plane(ev, primary);
}
if (!target_plane ||
target_plane->type == WDRM_PLANE_TYPE_CURSOR) {
/* cursor plane & renderer involve a copy */
ev->psf_flags = 0;
} else {
/* All other planes are a direct scanout of a
* single client buffer.
*/
ev->psf_flags = WP_PRESENTATION_FEEDBACK_KIND_ZERO_COPY;
}
}
/* We rely on output->cursor_view being both an accurate reflection of
* the cursor plane's state, but also being maintained across repaints
* to avoid unnecessary damage uploads, per the comment in
* drm_output_prepare_cursor_view. In the event that we go from having
* a cursor view to not having a cursor view, we need to clear it. */
if (output->cursor_view) {
plane_state =
drm_output_state_get_existing_plane(state,
output->cursor_plane);
if (!plane_state || !plane_state->fb)
output->cursor_view = NULL;
}
}
static int
drm_output_init_egl(struct drm_output *output, struct drm_backend *b);
static void
drm_output_fini_egl(struct drm_output *output);
static int
drm_output_init_pixman(struct drm_output *output, struct drm_backend *b);
static void
drm_output_fini_pixman(struct drm_output *output);
static int
drm_output_switch_mode(struct weston_output *output_base, struct weston_mode *mode)
{
struct drm_output *output = to_drm_output(output_base);
struct drm_backend *b = to_drm_backend(output_base->compositor);
struct drm_mode *drm_mode = drm_output_choose_mode(output, mode);
if (!drm_mode) {
weston_log("%s: invalid resolution %dx%d\n",
output_base->name, mode->width, mode->height);
return -1;
}
if (&drm_mode->base == output->base.current_mode)
return 0;
output->base.current_mode->flags = 0;
output->base.current_mode = &drm_mode->base;
output->base.current_mode->flags =
WL_OUTPUT_MODE_CURRENT | WL_OUTPUT_MODE_PREFERRED;
/* XXX: This drops our current buffer too early, before we've started
* displaying it. Ideally this should be much more atomic and
* integrated with a full repaint cycle, rather than doing a
* sledgehammer modeswitch first, and only later showing new
* content.
*/
b->state_invalid = true;
if (b->use_pixman) {
drm_output_fini_pixman(output);
if (drm_output_init_pixman(output, b) < 0) {
weston_log("failed to init output pixman state with "
"new mode\n");
return -1;
}
} else {
drm_output_fini_egl(output);
if (drm_output_init_egl(output, b) < 0) {
weston_log("failed to init output egl state with "
"new mode");
return -1;
}
}
return 0;
}
static struct gbm_device *
create_gbm_device(int fd)
{
struct gbm_device *gbm;
gl_renderer = weston_load_module("gl-renderer.so",
"gl_renderer_interface");
if (!gl_renderer)
return NULL;
/* GBM will load a dri driver, but even though they need symbols from
* libglapi, in some version of Mesa they are not linked to it. Since
* only the gl-renderer module links to it, the call above won't make
* these symbols globally available, and loading the DRI driver fails.
* Workaround this by dlopen()'ing libglapi with RTLD_GLOBAL. */
dlopen("libglapi.so.0", RTLD_LAZY | RTLD_GLOBAL);
gbm = gbm_create_device(fd);
return gbm;
}
/* When initializing EGL, if the preferred buffer format isn't available
* we may be able to substitute an ARGB format for an XRGB one.
*
* This returns 0 if substitution isn't possible, but 0 might be a
* legitimate format for other EGL platforms, so the caller is
* responsible for checking for 0 before calling gl_renderer->create().
*
* This works around https://bugs.freedesktop.org/show_bug.cgi?id=89689
* but it's entirely possible we'll see this again on other implementations.
*/
static int
fallback_format_for(uint32_t format)
{
switch (format) {
case GBM_FORMAT_XRGB8888:
return GBM_FORMAT_ARGB8888;
case GBM_FORMAT_XRGB2101010:
return GBM_FORMAT_ARGB2101010;
default:
return 0;
}
}
static int
drm_backend_create_gl_renderer(struct drm_backend *b)
{
EGLint format[3] = {
b->gbm_format,
fallback_format_for(b->gbm_format),
0,
};
int n_formats = 2;
if (format[1])
n_formats = 3;
if (gl_renderer->display_create(b->compositor,
EGL_PLATFORM_GBM_KHR,
(void *)b->gbm,
NULL,
gl_renderer->opaque_attribs,
format,
n_formats) < 0) {
return -1;
}
return 0;
}
static int
init_egl(struct drm_backend *b)
{
b->gbm = create_gbm_device(b->drm.fd);
if (!b->gbm)
return -1;
if (drm_backend_create_gl_renderer(b) < 0) {
gbm_device_destroy(b->gbm);
return -1;
}
return 0;
}
static int
init_pixman(struct drm_backend *b)
{
return pixman_renderer_init(b->compositor);
}
/**
* Create a drm_plane for a hardware plane
*
* Creates one drm_plane structure for a hardware plane, and initialises its
* properties and formats.
*
* In the absence of universal plane support, where KMS does not explicitly
* expose the primary and cursor planes to userspace, this may also create
* an 'internal' plane for internal management.
*
* This function does not add the plane to the list of usable planes in Weston
* itself; the caller is responsible for this.
*
* Call drm_plane_destroy to clean up the plane.
*
* @sa drm_output_find_special_plane
* @param b DRM compositor backend
* @param kplane DRM plane to create, or NULL if creating internal plane
* @param output Output to create internal plane for, or NULL
* @param type Type to use when creating internal plane, or invalid
* @param format Format to use for internal planes, or 0
*/
static struct drm_plane *
drm_plane_create(struct drm_backend *b, const drmModePlane *kplane,
struct drm_output *output, enum wdrm_plane_type type,
uint32_t format)
{
struct drm_plane *plane;
drmModeObjectProperties *props;
uint32_t num_formats = (kplane) ? kplane->count_formats : 1;
plane = zalloc(sizeof(*plane) +
(sizeof(plane->formats[0]) * num_formats));
if (!plane) {
weston_log("%s: out of memory\n", __func__);
return NULL;
}
plane->backend = b;
plane->count_formats = num_formats;
plane->state_cur = drm_plane_state_alloc(NULL, plane);
plane->state_cur->complete = true;
if (kplane) {
plane->possible_crtcs = kplane->possible_crtcs;
plane->plane_id = kplane->plane_id;
props = drmModeObjectGetProperties(b->drm.fd, kplane->plane_id,
DRM_MODE_OBJECT_PLANE);
if (!props) {
weston_log("couldn't get plane properties\n");
goto err;
}
drm_property_info_populate(b, plane_props, plane->props,
WDRM_PLANE__COUNT, props);
plane->type =
drm_property_get_value(&plane->props[WDRM_PLANE_TYPE],
props,
WDRM_PLANE_TYPE__COUNT);
if (drm_plane_populate_formats(plane, kplane, props) < 0) {
drmModeFreeObjectProperties(props);
goto err;
}
drmModeFreeObjectProperties(props);
}
else {
plane->possible_crtcs = (1 << output->pipe);
plane->plane_id = 0;
plane->count_formats = 1;
plane->formats[0].format = format;
plane->type = type;
}
if (plane->type == WDRM_PLANE_TYPE__COUNT)
goto err_props;
/* With universal planes, everything is a DRM plane; without
* universal planes, the only DRM planes are overlay planes.
* Everything else is a fake plane. */
if (b->universal_planes) {
assert(kplane);
} else {
if (kplane)
assert(plane->type == WDRM_PLANE_TYPE_OVERLAY);
else
assert(plane->type != WDRM_PLANE_TYPE_OVERLAY &&
output);
}
weston_plane_init(&plane->base, b->compositor, 0, 0);
wl_list_insert(&b->plane_list, &plane->link);
return plane;
err_props:
drm_property_info_free(plane->props, WDRM_PLANE__COUNT);
err:
drm_plane_state_free(plane->state_cur, true);
free(plane);
return NULL;
}
/**
* Find, or create, a special-purpose plane
*
* Primary and cursor planes are a special case, in that before universal
* planes, they are driven by non-plane API calls. Without universal plane
* support, the only way to configure a primary plane is via drmModeSetCrtc,
* and the only way to configure a cursor plane is drmModeSetCursor2.
*
* Although they may actually be regular planes in the hardware, without
* universal plane support, these planes are not actually exposed to
* userspace in the regular plane list.
*
* However, for ease of internal tracking, we want to manage all planes
* through the same drm_plane structures. Therefore, when we are running
* without universal plane support, we create fake drm_plane structures
* to track these planes.
*
* @param b DRM backend
* @param output Output to use for plane
* @param type Type of plane
*/
static struct drm_plane *
drm_output_find_special_plane(struct drm_backend *b, struct drm_output *output,
enum wdrm_plane_type type)
{
struct drm_plane *plane;
if (!b->universal_planes) {
uint32_t format;
switch (type) {
case WDRM_PLANE_TYPE_CURSOR:
format = GBM_FORMAT_ARGB8888;
break;
case WDRM_PLANE_TYPE_PRIMARY:
/* We don't know what formats the primary plane supports
* before universal planes, so we just assume that the
* GBM format works; however, this isn't set until after
* the output is created. */
format = 0;
break;
default:
assert(!"invalid type in drm_output_find_special_plane");
break;
}
return drm_plane_create(b, NULL, output, type, format);
}
wl_list_for_each(plane, &b->plane_list, link) {
struct drm_output *tmp;
bool found_elsewhere = false;
if (plane->type != type)
continue;
if (!drm_plane_is_available(plane, output))
continue;
/* On some platforms, primary/cursor planes can roam
* between different CRTCs, so make sure we don't claim the
* same plane for two outputs. */
wl_list_for_each(tmp, &b->compositor->output_list,
base.link) {
if (tmp->cursor_plane == plane ||
tmp->scanout_plane == plane) {
found_elsewhere = true;
break;
}
}
if (found_elsewhere)
continue;
plane->possible_crtcs = (1 << output->pipe);
return plane;
}
return NULL;
}
/**
* Destroy one DRM plane
*
* Destroy a DRM plane, removing it from screen and releasing its retained
* buffers in the process. The counterpart to drm_plane_create.
*
* @param plane Plane to deallocate (will be freed)
*/
static void
drm_plane_destroy(struct drm_plane *plane)
{
if (plane->type == WDRM_PLANE_TYPE_OVERLAY)
drmModeSetPlane(plane->backend->drm.fd, plane->plane_id,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
drm_plane_state_free(plane->state_cur, true);
drm_property_info_free(plane->props, WDRM_PLANE__COUNT);
weston_plane_release(&plane->base);
wl_list_remove(&plane->link);
free(plane);
}
/**
* Create a drm_plane for virtual output
*
* Call drm_virtual_plane_destroy to clean up the plane.
*
* @param b DRM compositor backend
* @param output Output to create internal plane for
*/
static struct drm_plane *
drm_virtual_plane_create(struct drm_backend *b, struct drm_output *output)
{
struct drm_plane *plane;
/* num of formats is one */
plane = zalloc(sizeof(*plane) + sizeof(plane->formats[0]));
if (!plane) {
weston_log("%s: out of memory\n", __func__);
return NULL;
}
plane->type = WDRM_PLANE_TYPE_PRIMARY;
plane->backend = b;
plane->state_cur = drm_plane_state_alloc(NULL, plane);
plane->state_cur->complete = true;
plane->formats[0].format = output->gbm_format;
plane->count_formats = 1;
if ((output->gbm_bo_flags & GBM_BO_USE_LINEAR) && b->fb_modifiers) {
uint64_t *modifiers = zalloc(sizeof *modifiers);
if (modifiers) {
*modifiers = DRM_FORMAT_MOD_LINEAR;
plane->formats[0].modifiers = modifiers;
plane->formats[0].count_modifiers = 1;
}
}
weston_plane_init(&plane->base, b->compositor, 0, 0);
wl_list_insert(&b->plane_list, &plane->link);
return plane;
}
/**
* Destroy one DRM plane
*
* @param plane Plane to deallocate (will be freed)
*/
static void
drm_virtual_plane_destroy(struct drm_plane *plane)
{
drm_plane_state_free(plane->state_cur, true);
weston_plane_release(&plane->base);
wl_list_remove(&plane->link);
if (plane->formats[0].modifiers)
free(plane->formats[0].modifiers);
free(plane);
}
/**
* Initialise sprites (overlay planes)
*
* Walk the list of provided DRM planes, and add overlay planes.
*
* Call destroy_sprites to free these planes.
*
* @param b DRM compositor backend
*/
static void
create_sprites(struct drm_backend *b)
{
drmModePlaneRes *kplane_res;
drmModePlane *kplane;
struct drm_plane *drm_plane;
uint32_t i;
kplane_res = drmModeGetPlaneResources(b->drm.fd);
if (!kplane_res) {
weston_log("failed to get plane resources: %s\n",
strerror(errno));
return;
}
for (i = 0; i < kplane_res->count_planes; i++) {
kplane = drmModeGetPlane(b->drm.fd, kplane_res->planes[i]);
if (!kplane)
continue;
drm_plane = drm_plane_create(b, kplane, NULL,
WDRM_PLANE_TYPE__COUNT, 0);
drmModeFreePlane(kplane);
if (!drm_plane)
continue;
if (drm_plane->type == WDRM_PLANE_TYPE_OVERLAY)
weston_compositor_stack_plane(b->compositor,
&drm_plane->base,
&b->compositor->primary_plane);
}
drmModeFreePlaneResources(kplane_res);
}
/**
* Clean up sprites (overlay planes)
*
* The counterpart to create_sprites.
*
* @param b DRM compositor backend
*/
static void
destroy_sprites(struct drm_backend *b)
{
struct drm_plane *plane, *next;
wl_list_for_each_safe(plane, next, &b->plane_list, link)
drm_plane_destroy(plane);
}
/* returns a value between 0-255 range, where higher is brighter */
static uint32_t
drm_get_backlight(struct drm_head *head)
{
long brightness, max_brightness, norm;
brightness = backlight_get_brightness(head->backlight);
max_brightness = backlight_get_max_brightness(head->backlight);
/* convert it on a scale of 0 to 255 */
norm = (brightness * 255)/(max_brightness);
return (uint32_t) norm;
}
/* values accepted are between 0-255 range */
static void
drm_set_backlight(struct weston_output *output_base, uint32_t value)
{
struct drm_output *output = to_drm_output(output_base);
struct drm_head *head;
long max_brightness, new_brightness;
if (value > 255)
return;
wl_list_for_each(head, &output->base.head_list, base.output_link) {
if (!head->backlight)
return;
max_brightness = backlight_get_max_brightness(head->backlight);
/* get denormalized value */
new_brightness = (value * max_brightness) / 255;
backlight_set_brightness(head->backlight, new_brightness);
}
}
static void
drm_output_init_backlight(struct drm_output *output)
{
struct weston_head *base;
struct drm_head *head;
output->base.set_backlight = NULL;
wl_list_for_each(base, &output->base.head_list, output_link) {
head = to_drm_head(base);
if (head->backlight) {
weston_log("Initialized backlight for head '%s', device %s\n",
head->base.name, head->backlight->path);
if (!output->base.set_backlight) {
output->base.set_backlight = drm_set_backlight;
output->base.backlight_current =
drm_get_backlight(head);
}
}
}
}
/**
* Power output on or off
*
* The DPMS/power level of an output is used to switch it on or off. This
* is DRM's hook for doing so, which can called either as part of repaint,
* or independently of the repaint loop.
*
* If we are called as part of repaint, we simply set the relevant bit in
* state and return.
*
* This function is never called on a virtual output.
*/
static void
drm_set_dpms(struct weston_output *output_base, enum dpms_enum level)
{
struct drm_output *output = to_drm_output(output_base);
struct drm_backend *b = to_drm_backend(output_base->compositor);
struct drm_pending_state *pending_state = b->repaint_data;
struct drm_output_state *state;
int ret;
assert(!output->virtual);
if (output->state_cur->dpms == level)
return;
/* If we're being called during the repaint loop, then this is
* simple: discard any previously-generated state, and create a new
* state where we disable everything. When we come to flush, this
* will be applied.
*
* However, we need to be careful: we can be called whilst another
* output is in its repaint cycle (pending_state exists), but our
* output still has an incomplete state application outstanding.
* In that case, we need to wait until that completes. */
if (pending_state && !output->state_last) {
/* The repaint loop already sets DPMS on; we don't need to
* explicitly set it on here, as it will already happen
* whilst applying the repaint state. */
if (level == WESTON_DPMS_ON)
return;
state = drm_pending_state_get_output(pending_state, output);
if (state)
drm_output_state_free(state);
state = drm_output_get_disable_state(pending_state, output);
return;
}
/* As we throw everything away when disabling, just send us back through
* a repaint cycle. */
if (level == WESTON_DPMS_ON) {
if (output->dpms_off_pending)
output->dpms_off_pending = 0;
weston_output_schedule_repaint(output_base);
return;
}
/* If we've already got a request in the pipeline, then we need to
* park our DPMS request until that request has quiesced. */
if (output->state_last) {
output->dpms_off_pending = 1;
return;
}
pending_state = drm_pending_state_alloc(b);
drm_output_get_disable_state(pending_state, output);
ret = drm_pending_state_apply_sync(pending_state);
if (ret != 0)
weston_log("drm_set_dpms: couldn't disable output?\n");
}
static const char * const connector_type_names[] = {
[DRM_MODE_CONNECTOR_Unknown] = "Unknown",
[DRM_MODE_CONNECTOR_VGA] = "VGA",
[DRM_MODE_CONNECTOR_DVII] = "DVI-I",
[DRM_MODE_CONNECTOR_DVID] = "DVI-D",
[DRM_MODE_CONNECTOR_DVIA] = "DVI-A",
[DRM_MODE_CONNECTOR_Composite] = "Composite",
[DRM_MODE_CONNECTOR_SVIDEO] = "SVIDEO",
[DRM_MODE_CONNECTOR_LVDS] = "LVDS",
[DRM_MODE_CONNECTOR_Component] = "Component",
[DRM_MODE_CONNECTOR_9PinDIN] = "DIN",
[DRM_MODE_CONNECTOR_DisplayPort] = "DP",
[DRM_MODE_CONNECTOR_HDMIA] = "HDMI-A",
[DRM_MODE_CONNECTOR_HDMIB] = "HDMI-B",
[DRM_MODE_CONNECTOR_TV] = "TV",
[DRM_MODE_CONNECTOR_eDP] = "eDP",
#ifdef DRM_MODE_CONNECTOR_DSI
[DRM_MODE_CONNECTOR_VIRTUAL] = "Virtual",
[DRM_MODE_CONNECTOR_DSI] = "DSI",
#endif
#ifdef DRM_MODE_CONNECTOR_DPI
[DRM_MODE_CONNECTOR_DPI] = "DPI",
#endif
};
/** Create a name given a DRM connector
*
* \param con The DRM connector whose type and id form the name.
* \return A newly allocate string, or NULL on error. Must be free()'d
* after use.
*
* The name does not identify the DRM display device.
*/
static char *
make_connector_name(const drmModeConnector *con)
{
char *name;
const char *type_name = NULL;
int ret;
if (con->connector_type < ARRAY_LENGTH(connector_type_names))
type_name = connector_type_names[con->connector_type];
if (!type_name)
type_name = "UNNAMED";
ret = asprintf(&name, "%s-%d", type_name, con->connector_type_id);
if (ret < 0)
return NULL;
return name;
}
static void drm_output_fini_cursor_egl(struct drm_output *output)
{
unsigned int i;
for (i = 0; i < ARRAY_LENGTH(output->gbm_cursor_fb); i++) {
drm_fb_unref(output->gbm_cursor_fb[i]);
output->gbm_cursor_fb[i] = NULL;
}
}
static int
drm_output_init_cursor_egl(struct drm_output *output, struct drm_backend *b)
{
unsigned int i;
/* No point creating cursors if we don't have a plane for them. */
if (!output->cursor_plane)
return 0;
for (i = 0; i < ARRAY_LENGTH(output->gbm_cursor_fb); i++) {
struct gbm_bo *bo;
bo = gbm_bo_create(b->gbm, b->cursor_width, b->cursor_height,
GBM_FORMAT_ARGB8888,
GBM_BO_USE_CURSOR | GBM_BO_USE_WRITE);
if (!bo)
goto err;
output->gbm_cursor_fb[i] =
drm_fb_get_from_bo(bo, b, false, BUFFER_CURSOR);
if (!output->gbm_cursor_fb[i]) {
gbm_bo_destroy(bo);
goto err;
}
}
return 0;
err:
weston_log("cursor buffers unavailable, using gl cursors\n");
b->cursors_are_broken = 1;
drm_output_fini_cursor_egl(output);
return -1;
}
/* Init output state that depends on gl or gbm */
static int
drm_output_init_egl(struct drm_output *output, struct drm_backend *b)
{
EGLint format[2] = {
output->gbm_format,
fallback_format_for(output->gbm_format),
};
int n_formats = 1;
struct weston_mode *mode = output->base.current_mode;
struct drm_plane *plane = output->scanout_plane;
unsigned int i;
assert(output->gbm_surface == NULL);
for (i = 0; i < plane->count_formats; i++) {
if (plane->formats[i].format == output->gbm_format)
break;
}
if (i == plane->count_formats) {
weston_log("format 0x%x not supported by output %s\n",
output->gbm_format, output->base.name);
return -1;
}
#ifdef HAVE_GBM_MODIFIERS
if (plane->formats[i].count_modifiers > 0) {
output->gbm_surface =
gbm_surface_create_with_modifiers(b->gbm,
mode->width,
mode->height,
output->gbm_format,
plane->formats[i].modifiers,
plane->formats[i].count_modifiers);
}
/* If allocating with modifiers fails, try again without. This can
* happen when the KMS display device supports modifiers but the
* GBM driver does not, e.g. the old i915 Mesa driver. */
if (!output->gbm_surface)
#endif
{
output->gbm_surface =
gbm_surface_create(b->gbm, mode->width, mode->height,
output->gbm_format,
output->gbm_bo_flags);
}
if (!output->gbm_surface) {
weston_log("failed to create gbm surface\n");
return -1;
}
if (format[1])
n_formats = 2;
if (gl_renderer->output_window_create(&output->base,
(EGLNativeWindowType)output->gbm_surface,
output->gbm_surface,
gl_renderer->opaque_attribs,
format,
n_formats) < 0) {
weston_log("failed to create gl renderer output state\n");
gbm_surface_destroy(output->gbm_surface);
output->gbm_surface = NULL;
return -1;
}
drm_output_init_cursor_egl(output, b);
return 0;
}
static void
drm_output_fini_egl(struct drm_output *output)
{
struct drm_backend *b = to_drm_backend(output->base.compositor);
/* Destroying the GBM surface will destroy all our GBM buffers,
* regardless of refcount. Ensure we destroy them here. */
if (!b->shutting_down &&
output->scanout_plane->state_cur->fb &&
output->scanout_plane->state_cur->fb->type == BUFFER_GBM_SURFACE) {
drm_plane_state_free(output->scanout_plane->state_cur, true);
output->scanout_plane->state_cur =
drm_plane_state_alloc(NULL, output->scanout_plane);
output->scanout_plane->state_cur->complete = true;
}
gl_renderer->output_destroy(&output->base);
gbm_surface_destroy(output->gbm_surface);
output->gbm_surface = NULL;
drm_output_fini_cursor_egl(output);
}
static int
drm_output_init_pixman(struct drm_output *output, struct drm_backend *b)
{
int w = output->base.current_mode->width;
int h = output->base.current_mode->height;
uint32_t format = output->gbm_format;
uint32_t pixman_format;
unsigned int i;
uint32_t flags = 0;
switch (format) {
case GBM_FORMAT_XRGB8888:
pixman_format = PIXMAN_x8r8g8b8;
break;
case GBM_FORMAT_RGB565:
pixman_format = PIXMAN_r5g6b5;
break;
default:
weston_log("Unsupported pixman format 0x%x\n", format);
return -1;
}
/* FIXME error checking */
for (i = 0; i < ARRAY_LENGTH(output->dumb); i++) {
output->dumb[i] = drm_fb_create_dumb(b, w, h, format);
if (!output->dumb[i])
goto err;
output->image[i] =
pixman_image_create_bits(pixman_format, w, h,
output->dumb[i]->map,
output->dumb[i]->strides[0]);
if (!output->image[i])
goto err;
}
if (b->use_pixman_shadow)
flags |= PIXMAN_RENDERER_OUTPUT_USE_SHADOW;
if (pixman_renderer_output_create(&output->base, flags) < 0)
goto err;
weston_log("DRM: output %s %s shadow framebuffer.\n", output->base.name,
b->use_pixman_shadow ? "uses" : "does not use");
pixman_region32_init_rect(&output->previous_damage,
output->base.x, output->base.y, output->base.width, output->base.height);
return 0;
err:
for (i = 0; i < ARRAY_LENGTH(output->dumb); i++) {
if (output->dumb[i])
drm_fb_unref(output->dumb[i]);
if (output->image[i])
pixman_image_unref(output->image[i]);
output->dumb[i] = NULL;
output->image[i] = NULL;
}
return -1;
}
static void
drm_output_fini_pixman(struct drm_output *output)
{
struct drm_backend *b = to_drm_backend(output->base.compositor);
unsigned int i;
/* Destroying the Pixman surface will destroy all our buffers,
* regardless of refcount. Ensure we destroy them here. */
if (!b->shutting_down &&
output->scanout_plane->state_cur->fb &&
output->scanout_plane->state_cur->fb->type == BUFFER_PIXMAN_DUMB) {
drm_plane_state_free(output->scanout_plane->state_cur, true);
output->scanout_plane->state_cur =
drm_plane_state_alloc(NULL, output->scanout_plane);
output->scanout_plane->state_cur->complete = true;
}
pixman_renderer_output_destroy(&output->base);
pixman_region32_fini(&output->previous_damage);
for (i = 0; i < ARRAY_LENGTH(output->dumb); i++) {
pixman_image_unref(output->image[i]);
drm_fb_unref(output->dumb[i]);
output->dumb[i] = NULL;
output->image[i] = NULL;
}
}
static void
setup_output_seat_constraint(struct drm_backend *b,
struct weston_output *output,
const char *s)
{
if (strcmp(s, "") != 0) {
struct weston_pointer *pointer;
struct udev_seat *seat;
seat = udev_seat_get_named(&b->input, s);
if (!seat)
return;
seat->base.output = output;
pointer = weston_seat_get_pointer(&seat->base);
if (pointer)
weston_pointer_clamp(pointer,
&pointer->x,
&pointer->y);
}
}
static int
drm_output_attach_head(struct weston_output *output_base,
struct weston_head *head_base)
{
struct drm_backend *b = to_drm_backend(output_base->compositor);
if (wl_list_length(&output_base->head_list) >= MAX_CLONED_CONNECTORS)
return -1;
if (!output_base->enabled)
return 0;
/* XXX: ensure the configuration will work.
* This is actually impossible without major infrastructure
* work. */
/* Need to go through modeset to add connectors. */
/* XXX: Ideally we'd do this per-output, not globally. */
/* XXX: Doing it globally, what guarantees another output's update
* will not clear the flag before this output is updated?
*/
b->state_invalid = true;
weston_output_schedule_repaint(output_base);
return 0;
}
static void
drm_output_detach_head(struct weston_output *output_base,
struct weston_head *head_base)
{
struct drm_backend *b = to_drm_backend(output_base->compositor);
if (!output_base->enabled)
return;
/* Need to go through modeset to drop connectors that should no longer
* be driven. */
/* XXX: Ideally we'd do this per-output, not globally. */
b->state_invalid = true;
weston_output_schedule_repaint(output_base);
}
static int
parse_gbm_format(const char *s, uint32_t default_value, uint32_t *gbm_format)
{
const struct pixel_format_info *pinfo;
if (s == NULL) {
*gbm_format = default_value;
return 0;
}
pinfo = pixel_format_get_info_by_drm_name(s);
if (!pinfo) {
weston_log("fatal: unrecognized pixel format: %s\n", s);
return -1;
}
/* GBM formats and DRM formats are identical. */
*gbm_format = pinfo->format;
return 0;
}
static int
drm_head_read_current_setup(struct drm_head *head, struct drm_backend *backend)
{
int drm_fd = backend->drm.fd;
drmModeEncoder *encoder;
drmModeCrtc *crtc;
/* Get the current mode on the crtc that's currently driving
* this connector. */
encoder = drmModeGetEncoder(drm_fd, head->connector->encoder_id);
if (encoder != NULL) {
head->inherited_crtc_id = encoder->crtc_id;
crtc = drmModeGetCrtc(drm_fd, encoder->crtc_id);
drmModeFreeEncoder(encoder);
if (crtc == NULL)
return -1;
if (crtc->mode_valid)
head->inherited_mode = crtc->mode;
drmModeFreeCrtc(crtc);
}
return 0;
}
static void
drm_output_set_gbm_format(struct weston_output *base,
const char *gbm_format)
{
struct drm_output *output = to_drm_output(base);
struct drm_backend *b = to_drm_backend(base->compositor);
if (parse_gbm_format(gbm_format, b->gbm_format, &output->gbm_format) == -1)
output->gbm_format = b->gbm_format;
/* Without universal planes, we can't discover which formats are
* supported by the primary plane; we just hope that the GBM format
* works. */
if (!b->universal_planes)
output->scanout_plane->formats[0].format = output->gbm_format;
}
static void
drm_output_set_seat(struct weston_output *base,
const char *seat)
{
struct drm_output *output = to_drm_output(base);
struct drm_backend *b = to_drm_backend(base->compositor);
setup_output_seat_constraint(b, &output->base,
seat ? seat : "");
}
static int
drm_output_init_gamma_size(struct drm_output *output)
{
struct drm_backend *backend = to_drm_backend(output->base.compositor);
drmModeCrtc *crtc;
assert(output->base.compositor);
assert(output->crtc_id != 0);
crtc = drmModeGetCrtc(backend->drm.fd, output->crtc_id);
if (!crtc)
return -1;
output->base.gamma_size = crtc->gamma_size;
drmModeFreeCrtc(crtc);
return 0;
}
static uint32_t
drm_head_get_possible_crtcs_mask(struct drm_head *head)
{
uint32_t possible_crtcs = 0;
drmModeEncoder *encoder;
int i;
for (i = 0; i < head->connector->count_encoders; i++) {
encoder = drmModeGetEncoder(head->backend->drm.fd,
head->connector->encoders[i]);
if (!encoder)
continue;
possible_crtcs |= encoder->possible_crtcs;
drmModeFreeEncoder(encoder);
}
return possible_crtcs;
}
static int
drm_crtc_get_index(drmModeRes *resources, uint32_t crtc_id)
{
int i;
for (i = 0; i < resources->count_crtcs; i++) {
if (resources->crtcs[i] == crtc_id)
return i;
}
assert(0 && "unknown crtc id");
return -1;
}
/** Pick a CRTC that might be able to drive all attached connectors
*
* @param output The output whose attached heads to include.
* @param resources The DRM KMS resources.
* @return CRTC index, or -1 on failure or not found.
*/
static int
drm_output_pick_crtc(struct drm_output *output, drmModeRes *resources)
{
struct drm_backend *backend;
struct weston_head *base;
struct drm_head *head;
uint32_t possible_crtcs = 0xffffffff;
int existing_crtc[32];
unsigned j, n = 0;
uint32_t crtc_id;
int best_crtc_index = -1;
int fallback_crtc_index = -1;
int i;
bool match;
backend = to_drm_backend(output->base.compositor);
/* This algorithm ignores drmModeEncoder::possible_clones restriction,
* because it is more often set wrong than not in the kernel. */
/* Accumulate a mask of possible crtcs and find existing routings. */
wl_list_for_each(base, &output->base.head_list, output_link) {
head = to_drm_head(base);
possible_crtcs &= drm_head_get_possible_crtcs_mask(head);
crtc_id = head->inherited_crtc_id;
if (crtc_id > 0 && n < ARRAY_LENGTH(existing_crtc))
existing_crtc[n++] = drm_crtc_get_index(resources,
crtc_id);
}
/* Find a crtc that could drive each connector individually at least,
* and prefer existing routings. */
for (i = 0; i < resources->count_crtcs; i++) {
crtc_id = resources->crtcs[i];
/* Could the crtc not drive each connector? */
if (!(possible_crtcs & (1 << i)))
continue;
/* Is the crtc already in use? */
if (drm_output_find_by_crtc(backend, crtc_id))
continue;
/* Try to preserve the existing CRTC -> connector routing;
* it makes initialisation faster, and also since we have a
* very dumb picking algorithm, may preserve a better
* choice. */
for (j = 0; j < n; j++) {
if (existing_crtc[j] == i)
return i;
}
/* Check if any other head had existing routing to this CRTC.
* If they did, this is not the best CRTC as it might be needed
* for another output we haven't enabled yet. */
match = false;
wl_list_for_each(base, &backend->compositor->head_list,
compositor_link) {
head = to_drm_head(base);
if (head->base.output == &output->base)
continue;
if (weston_head_is_enabled(&head->base))
continue;
if (head->inherited_crtc_id == crtc_id) {
match = true;
break;
}
}
if (!match)
best_crtc_index = i;
fallback_crtc_index = i;
}
if (best_crtc_index != -1)
return best_crtc_index;
if (fallback_crtc_index != -1)
return fallback_crtc_index;
/* Likely possible_crtcs was empty due to asking for clones,
* but since the DRM documentation says the kernel lies, let's
* pick one crtc anyway. Trial and error is the only way to
* be sure if something doesn't work. */
/* First pick any existing assignment. */
for (j = 0; j < n; j++) {
crtc_id = resources->crtcs[existing_crtc[j]];
if (!drm_output_find_by_crtc(backend, crtc_id))
return existing_crtc[j];
}
/* Otherwise pick any available crtc. */
for (i = 0; i < resources->count_crtcs; i++) {
crtc_id = resources->crtcs[i];
if (!drm_output_find_by_crtc(backend, crtc_id))
return i;
}
return -1;
}
/** Allocate a CRTC for the output
*
* @param output The output with no allocated CRTC.
* @param resources DRM KMS resources.
* @return 0 on success, -1 on failure.
*
* Finds a free CRTC that might drive the attached connectors, reserves the CRTC
* for the output, and loads the CRTC properties.
*
* Populates the cursor and scanout planes.
*
* On failure, the output remains without a CRTC.
*/
static int
drm_output_init_crtc(struct drm_output *output, drmModeRes *resources)
{
struct drm_backend *b = to_drm_backend(output->base.compositor);
drmModeObjectPropertiesPtr props;
int i;
assert(output->crtc_id == 0);
i = drm_output_pick_crtc(output, resources);
if (i < 0) {
weston_log("Output '%s': No available CRTCs.\n",
output->base.name);
return -1;
}
output->crtc_id = resources->crtcs[i];
output->pipe = i;
props = drmModeObjectGetProperties(b->drm.fd, output->crtc_id,
DRM_MODE_OBJECT_CRTC);
if (!props) {
weston_log("failed to get CRTC properties\n");
goto err_crtc;
}
drm_property_info_populate(b, crtc_props, output->props_crtc,
WDRM_CRTC__COUNT, props);
drmModeFreeObjectProperties(props);
output->scanout_plane =
drm_output_find_special_plane(b, output,
WDRM_PLANE_TYPE_PRIMARY);
if (!output->scanout_plane) {
weston_log("Failed to find primary plane for output %s\n",
output->base.name);
goto err_crtc;
}
/* Failing to find a cursor plane is not fatal, as we'll fall back
* to software cursor. */
output->cursor_plane =
drm_output_find_special_plane(b, output,
WDRM_PLANE_TYPE_CURSOR);
wl_array_remove_uint32(&b->unused_crtcs, output->crtc_id);
return 0;
err_crtc:
output->crtc_id = 0;
output->pipe = 0;
return -1;
}
/** Free the CRTC from the output
*
* @param output The output whose CRTC to deallocate.
*
* The CRTC reserved for the given output becomes free to use again.
*/
static void
drm_output_fini_crtc(struct drm_output *output)
{
struct drm_backend *b = to_drm_backend(output->base.compositor);
uint32_t *unused;
if (!b->universal_planes && !b->shutting_down) {
/* With universal planes, the 'special' planes are allocated at
* startup, freed at shutdown, and live on the plane list in
* between. We want the planes to continue to exist and be freed
* up for other outputs.
*
* Without universal planes, our special planes are
* pseudo-planes allocated at output creation, freed at output
* destruction, and not usable by other outputs.
*
* On the other hand, if the compositor is already shutting down,
* the plane has already been destroyed.
*/
if (output->cursor_plane)
drm_plane_destroy(output->cursor_plane);
if (output->scanout_plane)
drm_plane_destroy(output->scanout_plane);
}
drm_property_info_free(output->props_crtc, WDRM_CRTC__COUNT);
assert(output->crtc_id != 0);
unused = wl_array_add(&b->unused_crtcs, sizeof(*unused));
*unused = output->crtc_id;
/* Force resetting unused CRTCs */
b->state_invalid = true;
output->crtc_id = 0;
output->cursor_plane = NULL;
output->scanout_plane = NULL;
}
static int
drm_output_enable(struct weston_output *base)
{
struct drm_output *output = to_drm_output(base);
struct drm_backend *b = to_drm_backend(base->compositor);
drmModeRes *resources;
int ret;
assert(!output->virtual);
resources = drmModeGetResources(b->drm.fd);
if (!resources) {
weston_log("drmModeGetResources failed\n");
return -1;
}
ret = drm_output_init_crtc(output, resources);
drmModeFreeResources(resources);
if (ret < 0)
return -1;
if (drm_output_init_gamma_size(output) < 0)
goto err;
if (b->pageflip_timeout)
drm_output_pageflip_timer_create(output);
if (b->use_pixman) {
if (drm_output_init_pixman(output, b) < 0) {
weston_log("Failed to init output pixman state\n");
goto err;
}
} else if (drm_output_init_egl(output, b) < 0) {
weston_log("Failed to init output gl state\n");
goto err;
}
drm_output_init_backlight(output);
output->base.start_repaint_loop = drm_output_start_repaint_loop;
output->base.repaint = drm_output_repaint;
output->base.assign_planes = drm_assign_planes;
output->base.set_dpms = drm_set_dpms;
output->base.switch_mode = drm_output_switch_mode;
output->base.set_gamma = drm_output_set_gamma;
if (output->cursor_plane)
weston_compositor_stack_plane(b->compositor,
&output->cursor_plane->base,
NULL);
else
b->cursors_are_broken = 1;
weston_compositor_stack_plane(b->compositor,
&output->scanout_plane->base,
&b->compositor->primary_plane);
weston_log("Output %s (crtc %d) video modes:\n",
output->base.name, output->crtc_id);
drm_output_print_modes(output);
return 0;
err:
drm_output_fini_crtc(output);
return -1;
}
static void
drm_output_deinit(struct weston_output *base)
{
struct drm_output *output = to_drm_output(base);
struct drm_backend *b = to_drm_backend(base->compositor);
if (b->use_pixman)
drm_output_fini_pixman(output);
else
drm_output_fini_egl(output);
/* Since our planes are no longer in use anywhere, remove their base
* weston_plane's link from the plane stacking list, unless we're
* shutting down, in which case the plane has already been
* destroyed. */
if (!b->shutting_down) {
wl_list_remove(&output->scanout_plane->base.link);
wl_list_init(&output->scanout_plane->base.link);
if (output->cursor_plane) {
wl_list_remove(&output->cursor_plane->base.link);
wl_list_init(&output->cursor_plane->base.link);
/* Turn off hardware cursor */
drmModeSetCursor(b->drm.fd, output->crtc_id, 0, 0, 0);
}
}
drm_output_fini_crtc(output);
}
static void
drm_head_destroy(struct drm_head *head);
static void
drm_output_destroy(struct weston_output *base)
{
struct drm_output *output = to_drm_output(base);
struct drm_backend *b = to_drm_backend(base->compositor);
assert(!output->virtual);
if (output->page_flip_pending || output->atomic_complete_pending) {
output->destroy_pending = 1;
weston_log("destroy output while page flip pending\n");
return;
}
if (output->base.enabled)
drm_output_deinit(&output->base);
drm_mode_list_destroy(b, &output->base.mode_list);
if (output->pageflip_timer)
wl_event_source_remove(output->pageflip_timer);
weston_output_release(&output->base);
assert(!output->state_last);
drm_output_state_free(output->state_cur);
free(output);
}
static int
drm_output_disable(struct weston_output *base)
{
struct drm_output *output = to_drm_output(base);
assert(!output->virtual);
if (output->page_flip_pending || output->atomic_complete_pending) {
output->disable_pending = 1;
return -1;
}
weston_log("Disabling output %s\n", output->base.name);
if (output->base.enabled)
drm_output_deinit(&output->base);
output->disable_pending = 0;
return 0;
}
/**
* Update the list of unused connectors and CRTCs
*
* This keeps the unused_crtc arrays up to date.
*
* @param b Weston backend structure
* @param resources DRM resources for this device
*/
static void
drm_backend_update_unused_outputs(struct drm_backend *b, drmModeRes *resources)
{
int i;
wl_array_release(&b->unused_crtcs);
wl_array_init(&b->unused_crtcs);
for (i = 0; i < resources->count_crtcs; i++) {
struct drm_output *output;
uint32_t *crtc_id;
output = drm_output_find_by_crtc(b, resources->crtcs[i]);
if (output && output->base.enabled)
continue;
crtc_id = wl_array_add(&b->unused_crtcs, sizeof(*crtc_id));
*crtc_id = resources->crtcs[i];
}
}
/** Replace connector data and monitor information
*
* @param head The head to update.
* @param connector The connector data to be owned by the head, must match
* the head's connector ID.
* @return 0 on success, -1 on failure.
*
* Takes ownership of @c connector on success, not on failure.
*
* May schedule a heads changed call.
*/
static int
drm_head_assign_connector_info(struct drm_head *head,
drmModeConnector *connector)
{
drmModeObjectProperties *props;
assert(connector);
assert(head->connector_id == connector->connector_id);
props = drmModeObjectGetProperties(head->backend->drm.fd,
head->connector_id,
DRM_MODE_OBJECT_CONNECTOR);
if (!props) {
weston_log("Error: failed to get connector '%s' properties\n",
head->base.name);
return -1;
}
if (head->connector)
drmModeFreeConnector(head->connector);
head->connector = connector;
drm_property_info_populate(head->backend, connector_props,
head->props_conn,
WDRM_CONNECTOR__COUNT, props);
update_head_from_connector(head, props);
drmModeFreeObjectProperties(props);
return 0;
}
static void
drm_head_log_info(struct drm_head *head, const char *msg)
{
if (head->base.connected) {
weston_log("DRM: head '%s' %s, connector %d is connected, "
"EDID make '%s', model '%s', serial '%s'\n",
head->base.name, msg, head->connector_id,
head->base.make, head->base.model,
head->base.serial_number ?: "");
} else {
weston_log("DRM: head '%s' %s, connector %d is disconnected.\n",
head->base.name, msg, head->connector_id);
}
}
/** Update connector and monitor information
*
* @param head The head to update.
*
* Re-reads the DRM property lists for the connector and updates monitor
* information and connection status. This may schedule a heads changed call
* to the user.
*/
static void
drm_head_update_info(struct drm_head *head)
{
drmModeConnector *connector;
connector = drmModeGetConnector(head->backend->drm.fd,
head->connector_id);
if (!connector) {
weston_log("DRM: getting connector info for '%s' failed.\n",
head->base.name);
return;
}
if (drm_head_assign_connector_info(head, connector) < 0)
drmModeFreeConnector(connector);
if (head->base.device_changed)
drm_head_log_info(head, "updated");
}
/**
* Create a Weston head for a connector
*
* Given a DRM connector, create a matching drm_head structure and add it
* to Weston's head list.
*
* @param backend Weston backend structure
* @param connector_id DRM connector ID for the head
* @param drm_device udev device pointer
* @returns The new head, or NULL on failure.
*/
static struct drm_head *
drm_head_create(struct drm_backend *backend, uint32_t connector_id,
struct udev_device *drm_device)
{
struct drm_head *head;
drmModeConnector *connector;
char *name;
head = zalloc(sizeof *head);
if (!head)
return NULL;
connector = drmModeGetConnector(backend->drm.fd, connector_id);
if (!connector)
goto err_alloc;
name = make_connector_name(connector);
if (!name)
goto err_alloc;
weston_head_init(&head->base, name);
free(name);
head->connector_id = connector_id;
head->backend = backend;
head->backlight = backlight_init(drm_device, connector->connector_type);
if (drm_head_assign_connector_info(head, connector) < 0)
goto err_init;
if (head->connector->connector_type == DRM_MODE_CONNECTOR_LVDS ||
head->connector->connector_type == DRM_MODE_CONNECTOR_eDP)
weston_head_set_internal(&head->base);
if (drm_head_read_current_setup(head, backend) < 0) {
weston_log("Failed to retrieve current mode from connector %d.\n",
head->connector_id);
/* Not fatal. */
}
weston_compositor_add_head(backend->compositor, &head->base);
drm_head_log_info(head, "found");
return head;
err_init:
weston_head_release(&head->base);
err_alloc:
if (connector)
drmModeFreeConnector(connector);
free(head);
return NULL;
}
static void
drm_head_destroy(struct drm_head *head)
{
weston_head_release(&head->base);
drm_property_info_free(head->props_conn, WDRM_CONNECTOR__COUNT);
drmModeFreeConnector(head->connector);
if (head->backlight)
backlight_destroy(head->backlight);
free(head);
}
/**
* Create a Weston output structure
*
* Create an "empty" drm_output. This is the implementation of
* weston_backend::create_output.
*
* Creating an output is usually followed by drm_output_attach_head()
* and drm_output_enable() to make use of it.
*
* @param compositor The compositor instance.
* @param name Name for the new output.
* @returns The output, or NULL on failure.
*/
static struct weston_output *
drm_output_create(struct weston_compositor *compositor, const char *name)
{
struct drm_backend *b = to_drm_backend(compositor);
struct drm_output *output;
output = zalloc(sizeof *output);
if (output == NULL)
return NULL;
output->backend = b;
output->gbm_bo_flags = GBM_BO_USE_SCANOUT | GBM_BO_USE_RENDERING;
weston_output_init(&output->base, compositor, name);
output->base.enable = drm_output_enable;
output->base.destroy = drm_output_destroy;
output->base.disable = drm_output_disable;
output->base.attach_head = drm_output_attach_head;
output->base.detach_head = drm_output_detach_head;
output->destroy_pending = 0;
output->disable_pending = 0;
output->state_cur = drm_output_state_alloc(output, NULL);
weston_compositor_add_pending_output(&output->base, b->compositor);
return &output->base;
}
static int
drm_backend_create_heads(struct drm_backend *b, struct udev_device *drm_device)
{
struct drm_head *head;
drmModeRes *resources;
int i;
resources = drmModeGetResources(b->drm.fd);
if (!resources) {
weston_log("drmModeGetResources failed\n");
return -1;
}
b->min_width = resources->min_width;
b->max_width = resources->max_width;
b->min_height = resources->min_height;
b->max_height = resources->max_height;
for (i = 0; i < resources->count_connectors; i++) {
uint32_t connector_id = resources->connectors[i];
head = drm_head_create(b, connector_id, drm_device);
if (!head) {
weston_log("DRM: failed to create head for connector %d.\n",
connector_id);
}
}
drm_backend_update_unused_outputs(b, resources);
drmModeFreeResources(resources);
return 0;
}
static void
drm_backend_update_heads(struct drm_backend *b, struct udev_device *drm_device)
{
drmModeRes *resources;
struct weston_head *base, *next;
struct drm_head *head;
int i;
resources = drmModeGetResources(b->drm.fd);
if (!resources) {
weston_log("drmModeGetResources failed\n");
return;
}
/* collect new connectors that have appeared, e.g. MST */
for (i = 0; i < resources->count_connectors; i++) {
uint32_t connector_id = resources->connectors[i];
head = drm_head_find_by_connector(b, connector_id);
if (head) {
drm_head_update_info(head);
} else {
head = drm_head_create(b, connector_id, drm_device);
if (!head)
weston_log("DRM: failed to create head for hot-added connector %d.\n",
connector_id);
}
}
/* Remove connectors that have disappeared. */
wl_list_for_each_safe(base, next,
&b->compositor->head_list, compositor_link) {
bool removed = true;
head = to_drm_head(base);
for (i = 0; i < resources->count_connectors; i++) {
if (resources->connectors[i] == head->connector_id) {
removed = false;
break;
}
}
if (!removed)
continue;
weston_log("DRM: head '%s' (connector %d) disappeared.\n",
head->base.name, head->connector_id);
drm_head_destroy(head);
}
drm_backend_update_unused_outputs(b, resources);
drmModeFreeResources(resources);
}
static int
udev_event_is_hotplug(struct drm_backend *b, struct udev_device *device)
{
const char *sysnum;
const char *val;
sysnum = udev_device_get_sysnum(device);
if (!sysnum || atoi(sysnum) != b->drm.id)
return 0;
val = udev_device_get_property_value(device, "HOTPLUG");
if (!val)
return 0;
return strcmp(val, "1") == 0;
}
static int
udev_drm_event(int fd, uint32_t mask, void *data)
{
struct drm_backend *b = data;
struct udev_device *event;
event = udev_monitor_receive_device(b->udev_monitor);
if (udev_event_is_hotplug(b, event))
drm_backend_update_heads(b, event);
udev_device_unref(event);
return 1;
}
static void
drm_destroy(struct weston_compositor *ec)
{
struct drm_backend *b = to_drm_backend(ec);
struct weston_head *base, *next;
udev_input_destroy(&b->input);
wl_event_source_remove(b->udev_drm_source);
wl_event_source_remove(b->drm_source);
b->shutting_down = true;
destroy_sprites(b);
weston_compositor_log_scope_destroy(b->debug);
b->debug = NULL;
weston_compositor_shutdown(ec);
wl_list_for_each_safe(base, next, &ec->head_list, compositor_link)
drm_head_destroy(to_drm_head(base));
if (b->gbm)
gbm_device_destroy(b->gbm);
udev_monitor_unref(b->udev_monitor);
udev_unref(b->udev);
weston_launcher_destroy(ec->launcher);
wl_array_release(&b->unused_crtcs);
close(b->drm.fd);
free(b->drm.filename);
free(b);
}
static void
session_notify(struct wl_listener *listener, void *data)
{
struct weston_compositor *compositor = data;
struct drm_backend *b = to_drm_backend(compositor);
struct drm_plane *plane;
struct drm_output *output;
if (compositor->session_active) {
weston_log("activating session\n");
weston_compositor_wake(compositor);
weston_compositor_damage_all(compositor);
b->state_invalid = true;
udev_input_enable(&b->input);
} else {
weston_log("deactivating session\n");
udev_input_disable(&b->input);
weston_compositor_offscreen(compositor);
/* If we have a repaint scheduled (either from a
* pending pageflip or the idle handler), make sure we
* cancel that so we don't try to pageflip when we're
* vt switched away. The OFFSCREEN state will prevent
* further attempts at repainting. When we switch
* back, we schedule a repaint, which will process
* pending frame callbacks. */
wl_list_for_each(output, &compositor->output_list, base.link) {
output->base.repaint_needed = false;
if (output->cursor_plane)
drmModeSetCursor(b->drm.fd, output->crtc_id,
0, 0, 0);
}
output = container_of(compositor->output_list.next,
struct drm_output, base.link);
wl_list_for_each(plane, &b->plane_list, link) {
if (plane->type != WDRM_PLANE_TYPE_OVERLAY)
continue;
drmModeSetPlane(b->drm.fd,
plane->plane_id,
output->crtc_id, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0);
}
}
}
/**
* Handle KMS GPU being added/removed
*
* If the device being added/removed is the KMS device, we activate/deactivate
* the compositor session.
*
* @param compositor The compositor instance.
* @param device The device being added/removed.
* @param added Whether the device is being added (or removed)
*/
static void
drm_device_changed(struct weston_compositor *compositor,
dev_t device, bool added)
{
struct drm_backend *b = to_drm_backend(compositor);
if (b->drm.fd < 0 || b->drm.devnum != device)
return;
compositor->session_active = added;
wl_signal_emit(&compositor->session_signal, compositor);
}
/**
* Determines whether or not a device is capable of modesetting. If successful,
* sets b->drm.fd and b->drm.filename to the opened device.
*/
static bool
drm_device_is_kms(struct drm_backend *b, struct udev_device *device)
{
const char *filename = udev_device_get_devnode(device);
const char *sysnum = udev_device_get_sysnum(device);
dev_t devnum = udev_device_get_devnum(device);
drmModeRes *res;
int id = -1, fd;
if (!filename)
return false;
fd = weston_launcher_open(b->compositor->launcher, filename, O_RDWR);
if (fd < 0)
return false;
res = drmModeGetResources(fd);
if (!res)
goto out_fd;
if (res->count_crtcs <= 0 || res->count_connectors <= 0 ||
res->count_encoders <= 0)
goto out_res;
if (sysnum)
id = atoi(sysnum);
if (!sysnum || id < 0) {
weston_log("couldn't get sysnum for device %s\n", filename);
goto out_res;
}
/* We can be called successfully on multiple devices; if we have,
* clean up old entries. */
if (b->drm.fd >= 0)
weston_launcher_close(b->compositor->launcher, b->drm.fd);
free(b->drm.filename);
b->drm.fd = fd;
b->drm.id = id;
b->drm.filename = strdup(filename);
b->drm.devnum = devnum;
drmModeFreeResources(res);
return true;
out_res:
drmModeFreeResources(res);
out_fd:
weston_launcher_close(b->compositor->launcher, fd);
return false;
}
/*
* Find primary GPU
* Some systems may have multiple DRM devices attached to a single seat. This
* function loops over all devices and tries to find a PCI device with the
* boot_vga sysfs attribute set to 1.
* If no such device is found, the first DRM device reported by udev is used.
* Devices are also vetted to make sure they are are capable of modesetting,
* rather than pure render nodes (GPU with no display), or pure
* memory-allocation devices (VGEM).
*/
static struct udev_device*
find_primary_gpu(struct drm_backend *b, const char *seat)
{
struct udev_enumerate *e;
struct udev_list_entry *entry;
const char *path, *device_seat, *id;
struct udev_device *device, *drm_device, *pci;
e = udev_enumerate_new(b->udev);
udev_enumerate_add_match_subsystem(e, "drm");
udev_enumerate_add_match_sysname(e, "card[0-9]*");
udev_enumerate_scan_devices(e);
drm_device = NULL;
udev_list_entry_foreach(entry, udev_enumerate_get_list_entry(e)) {
bool is_boot_vga = false;
path = udev_list_entry_get_name(entry);
device = udev_device_new_from_syspath(b->udev, path);
if (!device)
continue;
device_seat = udev_device_get_property_value(device, "ID_SEAT");
if (!device_seat)
device_seat = default_seat;
if (strcmp(device_seat, seat)) {
udev_device_unref(device);
continue;
}
pci = udev_device_get_parent_with_subsystem_devtype(device,
"pci", NULL);
if (pci) {
id = udev_device_get_sysattr_value(pci, "boot_vga");
if (id && !strcmp(id, "1"))
is_boot_vga = true;
}
/* If we already have a modesetting-capable device, and this
* device isn't our boot-VGA device, we aren't going to use
* it. */
if (!is_boot_vga && drm_device) {
udev_device_unref(device);
continue;
}
/* Make sure this device is actually capable of modesetting;
* if this call succeeds, b->drm.{fd,filename} will be set,
* and any old values freed. */
if (!drm_device_is_kms(b, device)) {
udev_device_unref(device);
continue;
}
/* There can only be one boot_vga device, and we try to use it
* at all costs. */
if (is_boot_vga) {
if (drm_device)
udev_device_unref(drm_device);
drm_device = device;
break;
}
/* Per the (!is_boot_vga && drm_device) test above, we only
* trump existing saved devices with boot-VGA devices, so if
* we end up here, this must be the first device we've seen. */
assert(!drm_device);
drm_device = device;
}
/* If we're returning a device to use, we must have an open FD for
* it. */
assert(!!drm_device == (b->drm.fd >= 0));
udev_enumerate_unref(e);
return drm_device;
}
static struct udev_device *
open_specific_drm_device(struct drm_backend *b, const char *name)
{
struct udev_device *device;
device = udev_device_new_from_subsystem_sysname(b->udev, "drm", name);
if (!device) {
weston_log("ERROR: could not open DRM device '%s'\n", name);
return NULL;
}
if (!drm_device_is_kms(b, device)) {
udev_device_unref(device);
weston_log("ERROR: DRM device '%s' is not a KMS device.\n", name);
return NULL;
}
/* If we're returning a device to use, we must have an open FD for
* it. */
assert(b->drm.fd >= 0);
return device;
}
static void
planes_binding(struct weston_keyboard *keyboard, const struct timespec *time,
uint32_t key, void *data)
{
struct drm_backend *b = data;
switch (key) {
case KEY_C:
b->cursors_are_broken ^= 1;
break;
case KEY_V:
/* We don't support overlay-plane usage with legacy KMS. */
if (b->atomic_modeset)
b->sprites_are_broken ^= 1;
break;
case KEY_O:
b->sprites_hidden ^= 1;
break;
default:
break;
}
}
#ifdef BUILD_VAAPI_RECORDER
static void
recorder_destroy(struct drm_output *output)
{
vaapi_recorder_destroy(output->recorder);
output->recorder = NULL;
output->base.disable_planes--;
wl_list_remove(&output->recorder_frame_listener.link);
weston_log("[libva recorder] done\n");
}
static void
recorder_frame_notify(struct wl_listener *listener, void *data)
{
struct drm_output *output;
struct drm_backend *b;
int fd, ret;
output = container_of(listener, struct drm_output,
recorder_frame_listener);
b = to_drm_backend(output->base.compositor);
if (!output->recorder)
return;
ret = drmPrimeHandleToFD(b->drm.fd,
output->scanout_plane->state_cur->fb->handles[0],
DRM_CLOEXEC, &fd);
if (ret) {
weston_log("[libva recorder] "
"failed to create prime fd for front buffer\n");
return;
}
ret = vaapi_recorder_frame(output->recorder, fd,
output->scanout_plane->state_cur->fb->strides[0]);
if (ret < 0) {
weston_log("[libva recorder] aborted: %s\n", strerror(errno));
recorder_destroy(output);
}
}
static void *
create_recorder(struct drm_backend *b, int width, int height,
const char *filename)
{
int fd;
drm_magic_t magic;
fd = open(b->drm.filename, O_RDWR | O_CLOEXEC);
if (fd < 0)
return NULL;
drmGetMagic(fd, &magic);
drmAuthMagic(b->drm.fd, magic);
return vaapi_recorder_create(fd, width, height, filename);
}
static void
recorder_binding(struct weston_keyboard *keyboard, const struct timespec *time,
uint32_t key, void *data)
{
struct drm_backend *b = data;
struct drm_output *output;
int width, height;
output = container_of(b->compositor->output_list.next,
struct drm_output, base.link);
if (!output->recorder) {
if (output->gbm_format != GBM_FORMAT_XRGB8888) {
weston_log("failed to start vaapi recorder: "
"output format not supported\n");
return;
}
width = output->base.current_mode->width;
height = output->base.current_mode->height;
output->recorder =
create_recorder(b, width, height, "capture.h264");
if (!output->recorder) {
weston_log("failed to create vaapi recorder\n");
return;
}
output->base.disable_planes++;
output->recorder_frame_listener.notify = recorder_frame_notify;
wl_signal_add(&output->base.frame_signal,
&output->recorder_frame_listener);
weston_output_schedule_repaint(&output->base);
weston_log("[libva recorder] initialized\n");
} else {
recorder_destroy(output);
}
}
#else
static void
recorder_binding(struct weston_keyboard *keyboard, const struct timespec *time,
uint32_t key, void *data)
{
weston_log("Compiled without libva support\n");
}
#endif
static void
switch_to_gl_renderer(struct drm_backend *b)
{
struct drm_output *output;
bool dmabuf_support_inited;
bool linux_explicit_sync_inited;
if (!b->use_pixman)
return;
dmabuf_support_inited = !!b->compositor->renderer->import_dmabuf;
linux_explicit_sync_inited =
b->compositor->capabilities & WESTON_CAP_EXPLICIT_SYNC;
weston_log("Switching to GL renderer\n");
b->gbm = create_gbm_device(b->drm.fd);
if (!b->gbm) {
weston_log("Failed to create gbm device. "
"Aborting renderer switch\n");
return;
}
wl_list_for_each(output, &b->compositor->output_list, base.link)
pixman_renderer_output_destroy(&output->base);
b->compositor->renderer->destroy(b->compositor);
if (drm_backend_create_gl_renderer(b) < 0) {
gbm_device_destroy(b->gbm);
weston_log("Failed to create GL renderer. Quitting.\n");
/* FIXME: we need a function to shutdown cleanly */
assert(0);
}
wl_list_for_each(output, &b->compositor->output_list, base.link)
drm_output_init_egl(output, b);
b->use_pixman = 0;
if (!dmabuf_support_inited && b->compositor->renderer->import_dmabuf) {
if (linux_dmabuf_setup(b->compositor) < 0)
weston_log("Error: initializing dmabuf "
"support failed.\n");
}
if (!linux_explicit_sync_inited &&
(b->compositor->capabilities & WESTON_CAP_EXPLICIT_SYNC)) {
if (linux_explicit_synchronization_setup(b->compositor) < 0)
weston_log("Error: initializing explicit "
" synchronization support failed.\n");
}
}
static void
renderer_switch_binding(struct weston_keyboard *keyboard,
const struct timespec *time, uint32_t key, void *data)
{
struct drm_backend *b =
to_drm_backend(keyboard->seat->compositor);
switch_to_gl_renderer(b);
}
static void
drm_virtual_output_start_repaint_loop(struct weston_output *output_base)
{
weston_output_finish_frame(output_base, NULL,
WP_PRESENTATION_FEEDBACK_INVALID);
}
static int
drm_virtual_output_submit_frame(struct drm_output *output,
struct drm_fb *fb)
{
struct drm_backend *b = to_drm_backend(output->base.compositor);
int fd, ret;
assert(fb->num_planes == 1);
ret = drmPrimeHandleToFD(b->drm.fd, fb->handles[0], DRM_CLOEXEC, &fd);
if (ret) {
weston_log("drmPrimeHandleFD failed, errno=%d\n", errno);
return -1;
}
drm_fb_ref(fb);
ret = output->virtual_submit_frame(&output->base, fd, fb->strides[0],
fb);
if (ret < 0) {
drm_fb_unref(fb);
close(fd);
}
return ret;
}
static int
drm_virtual_output_repaint(struct weston_output *output_base,
pixman_region32_t *damage,
void *repaint_data)
{
struct drm_pending_state *pending_state = repaint_data;
struct drm_output_state *state = NULL;
struct drm_output *output = to_drm_output(output_base);
struct drm_plane *scanout_plane = output->scanout_plane;
struct drm_plane_state *scanout_state;
assert(output->virtual);
if (output->disable_pending || output->destroy_pending)
goto err;
/* Drop frame if there isn't free buffers */
if (!gbm_surface_has_free_buffers(output->gbm_surface)) {
weston_log("%s: Drop frame!!\n", __func__);
return -1;
}
assert(!output->state_last);
/* If planes have been disabled in the core, we might not have
* hit assign_planes at all, so might not have valid output state
* here. */
state = drm_pending_state_get_output(pending_state, output);
if (!state)
state = drm_output_state_duplicate(output->state_cur,
pending_state,
DRM_OUTPUT_STATE_CLEAR_PLANES);
drm_output_render(state, damage);
scanout_state = drm_output_state_get_plane(state, scanout_plane);
if (!scanout_state || !scanout_state->fb)
goto err;
if (drm_virtual_output_submit_frame(output, scanout_state->fb) < 0)
goto err;
return 0;
err:
drm_output_state_free(state);
return -1;
}
static void
drm_virtual_output_deinit(struct weston_output *base)
{
struct drm_output *output = to_drm_output(base);
drm_output_fini_egl(output);
drm_virtual_plane_destroy(output->scanout_plane);
}
static void
drm_virtual_output_destroy(struct weston_output *base)
{
struct drm_output *output = to_drm_output(base);
assert(output->virtual);
if (output->base.enabled)
drm_virtual_output_deinit(&output->base);
weston_output_release(&output->base);
drm_output_state_free(output->state_cur);
free(output);
}
static int
drm_virtual_output_enable(struct weston_output *output_base)
{
struct drm_output *output = to_drm_output(output_base);
struct drm_backend *b = to_drm_backend(output_base->compositor);
assert(output->virtual);
if (b->use_pixman) {
weston_log("Not support pixman renderer on Virtual output\n");
goto err;
}
if (!output->virtual_submit_frame) {
weston_log("The virtual_submit_frame hook is not set\n");
goto err;
}
output->scanout_plane = drm_virtual_plane_create(b, output);
if (!output->scanout_plane) {
weston_log("Failed to find primary plane for output %s\n",
output->base.name);
return -1;
}
if (drm_output_init_egl(output, b) < 0) {
weston_log("Failed to init output gl state\n");
goto err;
}
output->base.start_repaint_loop = drm_virtual_output_start_repaint_loop;
output->base.repaint = drm_virtual_output_repaint;
output->base.assign_planes = drm_assign_planes;
output->base.set_dpms = NULL;
output->base.switch_mode = NULL;
output->base.gamma_size = 0;
output->base.set_gamma = NULL;
weston_compositor_stack_plane(b->compositor,
&output->scanout_plane->base,
&b->compositor->primary_plane);
return 0;
err:
return -1;
}
static int
drm_virtual_output_disable(struct weston_output *base)
{
struct drm_output *output = to_drm_output(base);
assert(output->virtual);
if (output->base.enabled)
drm_virtual_output_deinit(&output->base);
return 0;
}
static struct weston_output *
drm_virtual_output_create(struct weston_compositor *c, char *name)
{
struct drm_output *output;
output = zalloc(sizeof *output);
if (!output)
return NULL;
output->virtual = true;
output->gbm_bo_flags = GBM_BO_USE_LINEAR | GBM_BO_USE_RENDERING;
weston_output_init(&output->base, c, name);
output->base.enable = drm_virtual_output_enable;
output->base.destroy = drm_virtual_output_destroy;
output->base.disable = drm_virtual_output_disable;
output->base.attach_head = NULL;
output->state_cur = drm_output_state_alloc(output, NULL);
weston_compositor_add_pending_output(&output->base, c);
return &output->base;
}
static uint32_t
drm_virtual_output_set_gbm_format(struct weston_output *base,
const char *gbm_format)
{
struct drm_output *output = to_drm_output(base);
struct drm_backend *b = to_drm_backend(base->compositor);
if (parse_gbm_format(gbm_format, b->gbm_format, &output->gbm_format) == -1)
output->gbm_format = b->gbm_format;
return output->gbm_format;
}
static void
drm_virtual_output_set_submit_frame_cb(struct weston_output *output_base,
submit_frame_cb cb)
{
struct drm_output *output = to_drm_output(output_base);
output->virtual_submit_frame = cb;
}
static int
drm_virtual_output_get_fence_fd(struct weston_output *output_base)
{
return gl_renderer->create_fence_fd(output_base);
}
static void
drm_virtual_output_buffer_released(struct drm_fb *fb)
{
drm_fb_unref(fb);
}
static void
drm_virtual_output_finish_frame(struct weston_output *output_base,
struct timespec *stamp,
uint32_t presented_flags)
{
struct drm_output *output = to_drm_output(output_base);
struct drm_plane_state *ps;
wl_list_for_each(ps, &output->state_cur->plane_list, link)
ps->complete = true;
drm_output_state_free(output->state_last);
output->state_last = NULL;
weston_output_finish_frame(&output->base, stamp, presented_flags);
/* We can't call this from frame_notify, because the output's
* repaint needed flag is cleared just after that */
if (output->recorder)
weston_output_schedule_repaint(&output->base);
}
static const struct weston_drm_output_api api = {
drm_output_set_mode,
drm_output_set_gbm_format,
drm_output_set_seat,
};
static const struct weston_drm_virtual_output_api virt_api = {
drm_virtual_output_create,
drm_virtual_output_set_gbm_format,
drm_virtual_output_set_submit_frame_cb,
drm_virtual_output_get_fence_fd,
drm_virtual_output_buffer_released,
drm_virtual_output_finish_frame
};
static struct drm_backend *
drm_backend_create(struct weston_compositor *compositor,
struct weston_drm_backend_config *config)
{
struct drm_backend *b;
struct udev_device *drm_device;
struct wl_event_loop *loop;
const char *seat_id = default_seat;
const char *session_seat;
int ret;
session_seat = getenv("XDG_SEAT");
if (session_seat)
seat_id = session_seat;
if (config->seat_id)
seat_id = config->seat_id;
weston_log("initializing drm backend\n");
b = zalloc(sizeof *b);
if (b == NULL)
return NULL;
b->state_invalid = true;
b->drm.fd = -1;
wl_array_init(&b->unused_crtcs);
b->compositor = compositor;
b->use_pixman = config->use_pixman;
b->pageflip_timeout = config->pageflip_timeout;
b->use_pixman_shadow = config->use_pixman_shadow;
b->debug = weston_compositor_add_log_scope(compositor->weston_log_ctx,
"drm-backend",
"Debug messages from DRM/KMS backend\n",
NULL, NULL);
compositor->backend = &b->base;
if (parse_gbm_format(config->gbm_format, GBM_FORMAT_XRGB8888, &b->gbm_format) < 0)
goto err_compositor;
/* Check if we run drm-backend using weston-launch */
compositor->launcher = weston_launcher_connect(compositor, config->tty,
seat_id, true);
if (compositor->launcher == NULL) {
weston_log("fatal: drm backend should be run using "
"weston-launch binary, or your system should "
"provide the logind D-Bus API.\n");
goto err_compositor;
}
b->udev = udev_new();
if (b->udev == NULL) {
weston_log("failed to initialize udev context\n");
goto err_launcher;
}
b->session_listener.notify = session_notify;
wl_signal_add(&compositor->session_signal, &b->session_listener);
if (config->specific_device)
drm_device = open_specific_drm_device(b, config->specific_device);
else
drm_device = find_primary_gpu(b, seat_id);
if (drm_device == NULL) {
weston_log("no drm device found\n");
goto err_udev;
}
if (init_kms_caps(b) < 0) {
weston_log("failed to initialize kms\n");
goto err_udev_dev;
}
if (b->use_pixman) {
if (init_pixman(b) < 0) {
weston_log("failed to initialize pixman renderer\n");
goto err_udev_dev;
}
} else {
if (init_egl(b) < 0) {
weston_log("failed to initialize egl\n");
goto err_udev_dev;
}
}
b->base.destroy = drm_destroy;
b->base.repaint_begin = drm_repaint_begin;
b->base.repaint_flush = drm_repaint_flush;
b->base.repaint_cancel = drm_repaint_cancel;
b->base.create_output = drm_output_create;
b->base.device_changed = drm_device_changed;
weston_setup_vt_switch_bindings(compositor);
wl_list_init(&b->plane_list);
create_sprites(b);
if (udev_input_init(&b->input,
compositor, b->udev, seat_id,
config->configure_device) < 0) {
weston_log("failed to create input devices\n");
goto err_sprite;
}
if (drm_backend_create_heads(b, drm_device) < 0) {
weston_log("Failed to create heads for %s\n", b->drm.filename);
goto err_udev_input;
}
/* A this point we have some idea of whether or not we have a working
* cursor plane. */
if (!b->cursors_are_broken)
compositor->capabilities |= WESTON_CAP_CURSOR_PLANE;
loop = wl_display_get_event_loop(compositor->wl_display);
b->drm_source =
wl_event_loop_add_fd(loop, b->drm.fd,
WL_EVENT_READABLE, on_drm_input, b);
b->udev_monitor = udev_monitor_new_from_netlink(b->udev, "udev");
if (b->udev_monitor == NULL) {
weston_log("failed to initialize udev monitor\n");
goto err_drm_source;
}
udev_monitor_filter_add_match_subsystem_devtype(b->udev_monitor,
"drm", NULL);
b->udev_drm_source =
wl_event_loop_add_fd(loop,
udev_monitor_get_fd(b->udev_monitor),
WL_EVENT_READABLE, udev_drm_event, b);
if (udev_monitor_enable_receiving(b->udev_monitor) < 0) {
weston_log("failed to enable udev-monitor receiving\n");
goto err_udev_monitor;
}
udev_device_unref(drm_device);
weston_compositor_add_debug_binding(compositor, KEY_O,
planes_binding, b);
weston_compositor_add_debug_binding(compositor, KEY_C,
planes_binding, b);
weston_compositor_add_debug_binding(compositor, KEY_V,
planes_binding, b);
weston_compositor_add_debug_binding(compositor, KEY_Q,
recorder_binding, b);
weston_compositor_add_debug_binding(compositor, KEY_W,
renderer_switch_binding, b);
if (compositor->renderer->import_dmabuf) {
if (linux_dmabuf_setup(compositor) < 0)
weston_log("Error: initializing dmabuf "
"support failed.\n");
}
if (compositor->capabilities & WESTON_CAP_EXPLICIT_SYNC) {
if (linux_explicit_synchronization_setup(compositor) < 0)
weston_log("Error: initializing explicit "
" synchronization support failed.\n");
}
ret = weston_plugin_api_register(compositor, WESTON_DRM_OUTPUT_API_NAME,
&api, sizeof(api));
if (ret < 0) {
weston_log("Failed to register output API.\n");
goto err_udev_monitor;
}
ret = weston_plugin_api_register(compositor,
WESTON_DRM_VIRTUAL_OUTPUT_API_NAME,
&virt_api, sizeof(virt_api));
if (ret < 0) {
weston_log("Failed to register virtual output API.\n");
goto err_udev_monitor;
}
return b;
err_udev_monitor:
wl_event_source_remove(b->udev_drm_source);
udev_monitor_unref(b->udev_monitor);
err_drm_source:
wl_event_source_remove(b->drm_source);
err_udev_input:
udev_input_destroy(&b->input);
err_sprite:
if (b->gbm)
gbm_device_destroy(b->gbm);
destroy_sprites(b);
err_udev_dev:
udev_device_unref(drm_device);
err_launcher:
weston_launcher_destroy(compositor->launcher);
err_udev:
udev_unref(b->udev);
err_compositor:
weston_compositor_shutdown(compositor);
free(b);
return NULL;
}
static void
config_init_to_defaults(struct weston_drm_backend_config *config)
{
config->use_pixman_shadow = true;
}
WL_EXPORT int
weston_backend_init(struct weston_compositor *compositor,
struct weston_backend_config *config_base)
{
struct drm_backend *b;
struct weston_drm_backend_config config = {{ 0, }};
if (config_base == NULL ||
config_base->struct_version != WESTON_DRM_BACKEND_CONFIG_VERSION ||
config_base->struct_size > sizeof(struct weston_drm_backend_config)) {
weston_log("drm backend config structure is invalid\n");
return -1;
}
config_init_to_defaults(&config);
memcpy(&config, config_base, config_base->struct_size);
b = drm_backend_create(compositor, &config);
if (b == NULL)
return -1;
return 0;
}