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weston/libweston/backend-drm/drm.c
Jeffy Chen 9406664a54 backend-drm: Cleanup output's disable head list when destroying it 
Avoid memory use-after-free when the trying to remove entries from an
already freed list later.

Also add missing removal in drm_output_detach_head() and drm_head_destroy().

Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
2024-02-21 11:14:23 +00:00

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/*
* 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 <time.h>
#include <poll.h>
#include <xf86drm.h>
#include <xf86drmMode.h>
#include <libudev.h>
#include <libweston/libweston.h>
#include <libweston/backend-drm.h>
#include <libweston/weston-log.h>
#include "drm-internal.h"
#include "shared/hash.h"
#include "shared/helpers.h"
#include "shared/timespec-util.h"
#include "shared/string-helpers.h"
#include "shared/weston-drm-fourcc.h"
#include "output-capture.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"
static const char default_seat[] = "seat0";
static void
drm_backend_create_faked_zpos(struct drm_device *device)
{
struct drm_backend *b = device->backend;
struct drm_plane *plane, *tmp;
struct wl_list tmp_list;
uint64_t zpos = 0ULL;
uint64_t zpos_min_primary;
uint64_t zpos_min_overlay;
uint64_t zpos_min_cursor;
/* if the property is there, bail out sooner */
wl_list_for_each(plane, &device->plane_list, link) {
if (plane->props[WDRM_PLANE_ZPOS].prop_id != 0)
return;
}
drm_debug(b, "[drm-backend] zpos property not found. "
"Using invented immutable zpos values:\n");
wl_list_init(&tmp_list);
wl_list_insert_list(&tmp_list, &device->plane_list);
wl_list_init(&device->plane_list);
zpos_min_primary = zpos;
wl_list_for_each_safe(plane, tmp, &tmp_list, link) {
if (plane->type != WDRM_PLANE_TYPE_PRIMARY)
continue;
plane->zpos_min = zpos_min_primary;
plane->zpos_max = zpos_min_primary;
wl_list_remove(&plane->link);
wl_list_insert(&device->plane_list, &plane->link);
zpos++;
drm_debug(b, "\t[plane] %s plane %d, zpos_min %"PRIu64", "
"zpos_max %"PRIu64"\n",
drm_output_get_plane_type_name(plane),
plane->plane_id, plane->zpos_min, plane->zpos_max);
}
zpos_min_overlay = zpos;
wl_list_for_each_safe(plane, tmp, &tmp_list, link) {
if (plane->type != WDRM_PLANE_TYPE_OVERLAY)
continue;
plane->zpos_min = zpos_min_overlay;
plane->zpos_max = zpos_min_overlay;
wl_list_remove(&plane->link);
wl_list_insert(&device->plane_list, &plane->link);
zpos++;
drm_debug(b, "\t[plane] %s plane %d, zpos_min %"PRIu64", "
"zpos_max %"PRIu64"\n",
drm_output_get_plane_type_name(plane),
plane->plane_id, plane->zpos_min, plane->zpos_max);
}
zpos_min_cursor = zpos;
wl_list_for_each_safe(plane, tmp, &tmp_list, link) {
if (plane->type != WDRM_PLANE_TYPE_CURSOR)
continue;
plane->zpos_min = zpos_min_cursor;
plane->zpos_max = zpos_min_cursor;
wl_list_remove(&plane->link);
wl_list_insert(&device->plane_list, &plane->link);
zpos++;
drm_debug(b, "\t[plane] %s plane %d, zpos_min %"PRIu64", "
"zpos_max %"PRIu64"\n",
drm_output_get_plane_type_name(plane),
plane->plane_id, plane->zpos_min, plane->zpos_max);
}
assert(wl_list_empty(&tmp_list));
}
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;
}
/**
* Returns true if the plane can be used on the given output for its current
* repaint cycle.
*/
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->crtc->pipe));
}
struct drm_crtc *
drm_crtc_find(struct drm_device *device, uint32_t crtc_id)
{
struct drm_crtc *crtc;
wl_list_for_each(crtc, &device->crtc_list, link) {
if (crtc->crtc_id == crtc_id)
return crtc;
}
return NULL;
}
struct drm_head *
drm_head_find_by_connector(struct drm_backend *backend, struct drm_device *device, 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)
continue;
if (head->connector.device != device)
continue;
if (head->connector.connector_id != connector_id)
continue;
return head;
}
return NULL;
}
static struct drm_writeback *
drm_writeback_find_by_connector(struct drm_device *device, uint32_t connector_id)
{
struct drm_writeback *writeback;
wl_list_for_each(writeback, &device->writeback_connector_list, link) {
if (writeback->connector.connector_id == connector_id)
return writeback;
}
return NULL;
}
/**
* 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;
output_state->protection = WESTON_HDCP_DISABLE;
return output_state;
}
static int
drm_output_apply_mode(struct drm_output *output);
/**
* 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_device *device = output->device;
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 = false;
output->disable_pending = false;
output->dpms_off_pending = false;
output->mode_switch_pending = false;
drm_output_destroy(&output->base);
return;
} else if (output->disable_pending) {
output->disable_pending = false;
output->dpms_off_pending = false;
output->mode_switch_pending = false;
weston_output_disable(&output->base);
return;
} else if (output->dpms_off_pending) {
struct drm_pending_state *pending = drm_pending_state_alloc(device);
output->dpms_off_pending = false;
output->mode_switch_pending = false;
drm_output_get_disable_state(pending, output);
drm_pending_state_apply_sync(pending);
} else if (output->mode_switch_pending) {
output->mode_switch_pending = false;
drm_output_apply_mode(output);
}
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;
}
if (output->state_cur->tear)
flags |= WESTON_FINISH_FRAME_TEARING;
ts.tv_sec = sec;
ts.tv_nsec = usec * 1000;
if (output->state_cur->dpms != WESTON_DPMS_OFF)
weston_output_finish_frame(&output->base, &ts, flags);
else
weston_output_finish_frame(&output->base, NULL,
WP_PRESENTATION_FEEDBACK_INVALID);
/* 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_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;
ec->renderer->repaint_output(&output->base, damage,
output->renderbuffer[output->current_image]);
return drm_fb_ref(output->dumb[output->current_image]);
}
void
drm_output_render(struct drm_output_state *state)
{
struct drm_output *output = state->output;
struct drm_device *device = output->device;
struct weston_compositor *c = output->base.compositor;
struct drm_plane_state *scanout_state;
struct drm_plane *scanout_plane = output->scanout_plane;
struct drm_property_info *damage_info =
&scanout_plane->props[WDRM_PLANE_FB_DAMAGE_CLIPS];
struct drm_fb *fb;
pixman_region32_t damage, scanout_damage;
pixman_box32_t *rects;
int n_rects;
/* 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, scanout_plane);
if (scanout_state->fb)
return;
pixman_region32_init(&damage);
weston_output_flush_damage_for_primary_plane(&output->base, &damage);
/*
* If we don't have any damage on the primary plane, and we already
* have a renderer buffer active, we can reuse it; else we pass
* the damaged region into the renderer to re-render the affected
* area. But, we still have to call the renderer anyway if any screen
* capture is pending, otherwise the capture will not complete.
*/
if (!pixman_region32_not_empty(&damage) &&
wl_list_empty(&output->base.frame_signal.listener_list) &&
!weston_output_has_renderer_capture_tasks(&output->base) &&
scanout_plane->state_cur->fb &&
(scanout_plane->state_cur->fb->type == BUFFER_GBM_SURFACE ||
scanout_plane->state_cur->fb->type == BUFFER_PIXMAN_DUMB)) {
fb = drm_fb_ref(scanout_plane->state_cur->fb);
} else if (c->renderer->type == WESTON_RENDERER_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);
goto out;
}
scanout_state->fb = fb;
scanout_state->output = output;
scanout_state->src_x = 0;
scanout_state->src_y = 0;
scanout_state->src_w = fb->width << 16;
scanout_state->src_h = fb->height << 16;
scanout_state->dest_x = 0;
scanout_state->dest_y = 0;
scanout_state->dest_w = output->base.current_mode->width;
scanout_state->dest_h = output->base.current_mode->height;
scanout_state->zpos = scanout_plane->zpos_min;
/* Don't bother calculating plane damage if the plane doesn't support it */
if (damage_info->prop_id == 0)
goto out;
pixman_region32_init(&scanout_damage);
weston_region_global_to_output(&scanout_damage,
&output->base,
&damage);
assert(scanout_state->damage_blob_id == 0);
rects = pixman_region32_rectangles(&scanout_damage, &n_rects);
/*
* If this function fails, the blob id should still be 0.
* This tells the kernel there is no damage information, which means
* that it will consider the whole plane damaged. While this may
* affect efficiency, it should still produce correct results.
*/
drmModeCreatePropertyBlob(device->drm.fd, rects,
sizeof(*rects) * n_rects,
&scanout_state->damage_blob_id);
pixman_region32_fini(&scanout_damage);
out:
pixman_region32_fini(&damage);
}
static uint32_t
drm_connector_get_possible_crtcs_mask(struct drm_connector *connector)
{
struct drm_device *device = connector->device;
uint32_t possible_crtcs = 0;
drmModeConnector *conn = connector->conn;
drmModeEncoder *encoder;
int i;
for (i = 0; i < conn->count_encoders; i++) {
encoder = drmModeGetEncoder(device->drm.fd,
conn->encoders[i]);
if (!encoder)
continue;
possible_crtcs |= encoder->possible_crtcs;
drmModeFreeEncoder(encoder);
}
return possible_crtcs;
}
static struct drm_writeback *
drm_output_find_compatible_writeback(struct drm_output *output)
{
struct drm_crtc *crtc;
struct drm_writeback *wb;
bool in_use;
uint32_t possible_crtcs;
wl_list_for_each(wb, &output->device->writeback_connector_list, link) {
/* Another output may be using the writeback connector. */
in_use = false;
wl_list_for_each(crtc, &output->device->crtc_list, link) {
if (crtc->output && crtc->output->wb_state &&
crtc->output->wb_state->wb == wb) {
in_use = true;
break;
}
}
if (in_use)
continue;
/* Is the writeback connector compatible with the CRTC? */
possible_crtcs =
drm_connector_get_possible_crtcs_mask(&wb->connector);
if (!(possible_crtcs & (1 << output->crtc->pipe)))
continue;
/* Does the writeback connector support the output gbm format? */
if (!weston_drm_format_array_find_format(&wb->formats,
output->format->format))
continue;
return wb;
}
return NULL;
}
static struct drm_writeback_state *
drm_writeback_state_alloc(void)
{
struct drm_writeback_state *state;
state = zalloc(sizeof *state);
if (!state)
return NULL;
state->state = DRM_OUTPUT_WB_SCREENSHOT_OFF;
state->out_fence_fd = -1;
wl_array_init(&state->referenced_fbs);
return state;
}
static void
drm_writeback_state_free(struct drm_writeback_state *state)
{
struct drm_fb **fb;
if (state->out_fence_fd >= 0)
close(state->out_fence_fd);
/* Unref framebuffer that was given to save the content of the writeback */
if (state->fb)
drm_fb_unref(state->fb);
/* Unref framebuffers that were in use in the same commit of the one with
* the writeback setup */
wl_array_for_each(fb, &state->referenced_fbs)
drm_fb_unref(*fb);
wl_array_release(&state->referenced_fbs);
free(state);
}
static void
drm_output_pick_writeback_capture_task(struct drm_output *output)
{
struct weston_capture_task *ct;
struct weston_buffer *buffer;
struct drm_writeback *wb;
const char *msg;
int32_t width = output->base.current_mode->width;
int32_t height = output->base.current_mode->height;
uint32_t format = output->format->format;
assert(output->device->atomic_modeset);
ct = weston_output_pull_capture_task(&output->base,
WESTON_OUTPUT_CAPTURE_SOURCE_WRITEBACK,
width, height, pixel_format_get_info(format));
if (!ct)
return;
if (output->base.disable_planes > 0) {
msg = "drm: KMS planes usage is disabled for now, so " \
"writeback capture tasks are rejected";
goto err;
}
wb = drm_output_find_compatible_writeback(output);
if (!wb) {
msg = "drm: could not find writeback connector for output";
goto err;
}
buffer = weston_capture_task_get_buffer(ct);
assert(buffer->width == width);
assert(buffer->height == height);
assert(buffer->pixel_format->format == output->format->format);
output->wb_state = drm_writeback_state_alloc();
if (!output->wb_state) {
msg = "drm: failed to allocate memory for writeback state";
goto err;
}
output->wb_state->fb = drm_fb_create_dumb(output->device, width, height, format);
if (!output->wb_state->fb) {
msg = "drm: failed to create dumb buffer for writeback state";
goto err_fb;
}
output->wb_state->output = output;
output->wb_state->wb = wb;
output->wb_state->state = DRM_OUTPUT_WB_SCREENSHOT_PREPARE_COMMIT;
output->wb_state->ct = ct;
return;
err_fb:
drm_writeback_state_free(output->wb_state);
output->wb_state = NULL;
err:
weston_capture_task_retire_failed(ct, msg);
}
#ifdef BUILD_DRM_GBM
/**
* 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_output *output, struct weston_view *ev)
{
struct drm_device *device = output->device;
struct gbm_bo *bo = output->gbm_cursor_fb[output->current_cursor]->bo;
struct weston_buffer *buffer = ev->surface->buffer_ref.buffer;
uint32_t buf[device->cursor_width * device->cursor_height];
int32_t stride;
uint8_t *s;
int i;
assert(buffer && buffer->shm_buffer);
assert(buffer->width <= device->cursor_width);
assert(buffer->height <= device->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 * device->cursor_width,
s + i * stride,
buffer->width * 4);
wl_shm_buffer_end_access(buffer->shm_buffer);
if (bo) {
if (gbm_bo_write(bo, buf, sizeof buf) < 0)
weston_log("failed update cursor: %s\n", strerror(errno));
} else {
memcpy(output->gbm_cursor_fb[output->current_cursor]->map,
buf, sizeof buf);
}
}
#else
static void
cursor_bo_update(struct drm_output *output, struct weston_view *ev)
{
}
#endif
static int
drm_output_repaint(struct weston_output *output_base)
{
struct drm_output *output = to_drm_output(output_base);
struct drm_output_state *state = NULL;
struct drm_plane_state *scanout_state;
struct drm_plane_state *cursor_state;
struct drm_pending_state *pending_state;
struct drm_device *device;
assert(output);
assert(!output->virtual);
device = output->device;
pending_state = device->repaint_data;
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;
cursor_state = drm_output_state_get_existing_plane(state,
output->cursor_plane);
if (cursor_state && cursor_state->fb) {
pixman_region32_t damage;
assert(cursor_state->plane == output->cursor_plane);
assert(cursor_state->fb == output->gbm_cursor_fb[0]);
pixman_region32_init(&damage);
weston_output_flush_damage_for_plane(&output->base,
&output->cursor_plane->base,
&damage);
if (pixman_region32_not_empty(&damage)) {
output->current_cursor++;
output->current_cursor =
output->current_cursor %
ARRAY_LENGTH(output->gbm_cursor_fb);
cursor_bo_update(output, output->cursor_view);
}
pixman_region32_fini(&damage);
cursor_state->fb = drm_fb_ref(output->gbm_cursor_fb[output->current_cursor]);
drm_fb_unref(output->gbm_cursor_fb[0]);
}
if (output_base->allow_protection)
state->protection = output_base->desired_protection;
else
state->protection = WESTON_HDCP_DISABLE;
if (drm_output_ensure_hdr_output_metadata_blob(output) < 0)
goto err;
if (device->atomic_modeset)
drm_output_pick_writeback_capture_task(output);
drm_output_render(state);
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_crtc *crtc)
{
if (crtc->pipe > 1)
return (crtc->pipe << DRM_VBLANK_HIGH_CRTC_SHIFT) &
DRM_VBLANK_HIGH_CRTC_MASK;
else if (crtc->pipe > 0)
return DRM_VBLANK_SECONDARY;
else
return 0;
}
static int
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_device *device = output->device;
struct drm_backend *backend = device->backend;
struct weston_compositor *compositor = backend->compositor;
struct timespec ts, tnow;
struct timespec vbl2now;
int64_t refresh_nsec;
uint32_t flags = WP_PRESENTATION_FEEDBACK_INVALID;
int ret;
drmVBlank vbl = {
.request.type = DRM_VBLANK_RELATIVE,
.request.sequence = 0,
.request.signal = 0,
};
if (output->disable_pending || output->destroy_pending)
return 0;
if (!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 (device->state_invalid)
goto finish_frame;
assert(scanout_plane->state_cur->output == output);
/* If we're tearing, we've been generating timestamps from the
* presentation clock that don't line up with the msc timestamps,
* and could be more recent than the latest msc, which would cause
* an assert() later.
*/
if (output->state_cur->tear) {
flags |= WESTON_FINISH_FRAME_TEARING;
goto finish_frame;
}
/* Try to get current msc and timestamp via instant query */
vbl.request.type |= drm_waitvblank_pipe(output->crtc);
ret = drmWaitVBlank(device->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(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, flags);
return 0;
}
}
/* 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(device);
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));
if (ret == -EACCES || ret == -EBUSY)
return ret;
goto finish_frame;
}
return 0;
finish_frame:
/* if we cannot page-flip, immediately finish frame */
weston_output_finish_frame(output_base, NULL, flags);
return 0;
}
/**
* 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_backend *backend)
{
struct drm_backend *b = container_of(backend, struct drm_backend, base);
struct drm_device *device;
struct drm_pending_state *pending_state;
device = b->drm;
pending_state = drm_pending_state_alloc(device);
device->repaint_data = pending_state;
if (weston_log_scope_is_enabled(b->debug)) {
char *dbg = weston_compositor_print_scene_graph(b->compositor);
drm_debug(b, "[repaint] Beginning repaint; pending_state %p\n",
device->repaint_data);
drm_debug(b, "%s", dbg);
free(dbg);
}
wl_list_for_each(device, &b->kms_list, link) {
pending_state = drm_pending_state_alloc(device);
device->repaint_data = pending_state;
if (weston_log_scope_is_enabled(b->debug)) {
char *dbg = weston_compositor_print_scene_graph(b->compositor);
drm_debug(b, "[repaint] Beginning repaint; pending_state %p\n",
pending_state);
drm_debug(b, "%s", dbg);
free(dbg);
}
}
}
/**
* 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 int
drm_repaint_flush(struct weston_backend *backend)
{
struct drm_backend *b = container_of(backend, struct drm_backend, base);
struct drm_device *device;
struct drm_pending_state *pending_state;
int ret;
device = b->drm;
pending_state = device->repaint_data;
ret = drm_pending_state_apply(pending_state);
if (ret != 0)
weston_log("repaint-flush failed: %s\n", strerror(errno));
drm_debug(b, "[repaint] flushed pending_state %p\n", pending_state);
device->repaint_data = NULL;
wl_list_for_each(device, &b->kms_list, link) {
pending_state = device->repaint_data;
ret = drm_pending_state_apply(pending_state);
if (ret != 0)
weston_log("repaint-flush failed: %s\n", strerror(errno));
drm_debug(b, "[repaint] flushed pending_state %p\n", pending_state);
device->repaint_data = NULL;
}
return (ret == -EACCES || ret == -EBUSY) ? ret : 0;
}
/**
* 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_backend *backend)
{
struct drm_backend *b = container_of(backend, struct drm_backend, base);
struct drm_device *device;
struct drm_pending_state *pending_state;
device = b->drm;
pending_state = device->repaint_data;
drm_pending_state_free(pending_state);
drm_debug(b, "[repaint] cancel pending_state %p\n", pending_state);
device->repaint_data = NULL;
wl_list_for_each(device, &b->kms_list, link) {
pending_state = device->repaint_data;
drm_pending_state_free(pending_state);
drm_debug(b, "[repaint] cancel pending_state %p\n", pending_state);
device->repaint_data = NULL;
}
}
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_mode *drm_mode;
assert(output);
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;
if (output->page_flip_pending || output->atomic_complete_pending) {
output->mode_switch_pending = true;
return 0;
}
return drm_output_apply_mode(output);
}
static int
drm_output_apply_mode(struct drm_output *output)
{
struct drm_device *device = output->device;
struct drm_backend *b = device->backend;
struct weston_size fb_size;
/* 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.
*/
device->state_invalid = true;
fb_size.width = output->base.current_mode->width;
fb_size.height = output->base.current_mode->height;
weston_renderer_resize_output(&output->base, &fb_size, NULL);
if (b->compositor->renderer->type == WESTON_RENDERER_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;
}
}
if (device->atomic_modeset)
weston_output_update_capture_info(&output->base,
WESTON_OUTPUT_CAPTURE_SOURCE_WRITEBACK,
output->base.current_mode->width,
output->base.current_mode->height,
pixel_format_get_info(output->format->format));
return 0;
}
static int
init_pixman(struct drm_backend *b)
{
return weston_compositor_init_renderer(b->compositor,
WESTON_RENDERER_PIXMAN, NULL);
}
/**
* Create a drm_plane for a hardware plane
*
* Creates one drm_plane structure for a hardware plane, and initialises its
* properties and formats.
*
* 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 device DRM device
* @param kplane DRM plane to create
*/
static struct drm_plane *
drm_plane_create(struct drm_device *device, const drmModePlane *kplane)
{
struct drm_backend *b = device->backend;
struct weston_compositor *compositor = b->compositor;
struct drm_plane *plane, *tmp;
drmModeObjectProperties *props;
uint64_t *zpos_range_values;
uint64_t *alpha_range_values;
plane = zalloc(sizeof(*plane));
if (!plane) {
weston_log("%s: out of memory\n", __func__);
return NULL;
}
plane->device = device;
plane->state_cur = drm_plane_state_alloc(NULL, plane);
plane->state_cur->complete = true;
plane->possible_crtcs = kplane->possible_crtcs;
plane->plane_id = kplane->plane_id;
plane->crtc_id = kplane->crtc_id;
weston_drm_format_array_init(&plane->formats);
props = drmModeObjectGetProperties(device->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(device, plane_props, plane->props,
WDRM_PLANE__COUNT, props);
plane->type =
drm_property_get_value(&plane->props[WDRM_PLANE_TYPE],
props,
WDRM_PLANE_TYPE__COUNT);
zpos_range_values =
drm_property_get_range_values(&plane->props[WDRM_PLANE_ZPOS],
props);
if (zpos_range_values) {
plane->zpos_min = zpos_range_values[0];
plane->zpos_max = zpos_range_values[1];
} else {
plane->zpos_min = DRM_PLANE_ZPOS_INVALID_PLANE;
plane->zpos_max = DRM_PLANE_ZPOS_INVALID_PLANE;
}
alpha_range_values =
drm_property_get_range_values(&plane->props[WDRM_PLANE_ALPHA],
props);
if (alpha_range_values) {
plane->alpha_min = (uint16_t) alpha_range_values[0];
plane->alpha_max = (uint16_t) alpha_range_values[1];
} else {
plane->alpha_min = DRM_PLANE_ALPHA_OPAQUE;
plane->alpha_max = DRM_PLANE_ALPHA_OPAQUE;
}
if (drm_plane_populate_formats(plane, kplane, props,
device->fb_modifiers) < 0) {
drmModeFreeObjectProperties(props);
goto err;
}
drmModeFreeObjectProperties(props);
if (plane->type == WDRM_PLANE_TYPE__COUNT)
goto err_props;
weston_plane_init(&plane->base, compositor);
wl_list_for_each(tmp, &device->plane_list, link) {
if (tmp->zpos_max < plane->zpos_max) {
wl_list_insert(tmp->link.prev, &plane->link);
break;
}
}
if (plane->link.next == NULL)
wl_list_insert(device->plane_list.prev, &plane->link);
return plane;
err_props:
drm_property_info_free(plane->props, WDRM_PLANE__COUNT);
err:
weston_drm_format_array_fini(&plane->formats);
drm_plane_state_free(plane->state_cur, true);
free(plane);
return NULL;
}
/**
* Find, or create, a special-purpose plane
*
* @param device DRM device
* @param output Output to use for plane
* @param type Type of plane
*/
static struct drm_plane *
drm_output_find_special_plane(struct drm_device *device,
struct drm_output *output,
enum wdrm_plane_type type)
{
struct drm_backend *b = device->backend;
struct drm_plane *plane;
wl_list_for_each(plane, &device->plane_list, link) {
struct weston_output *base;
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(base, &b->compositor->output_list, link) {
struct drm_output *tmp = to_drm_output(base);
if (!tmp)
continue;
if (tmp->cursor_plane == plane ||
tmp->scanout_plane == plane) {
found_elsewhere = true;
break;
}
}
if (found_elsewhere)
continue;
/* If a plane already has a CRTC selected and it is not our
* output's CRTC, then do not select this plane. We cannot
* switch away a plane from a CTRC when active. */
if ((type == WDRM_PLANE_TYPE_PRIMARY) &&
(plane->crtc_id != 0) &&
(plane->crtc_id != output->crtc->crtc_id))
continue;
plane->possible_crtcs = (1 << output->crtc->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)
{
struct drm_device *device = plane->device;
if (plane->type == WDRM_PLANE_TYPE_OVERLAY)
drmModeSetPlane(device->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);
weston_drm_format_array_fini(&plane->formats);
wl_list_remove(&plane->link);
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 device DRM device
*/
static void
create_sprites(struct drm_device *device)
{
struct drm_backend *b = device->backend;
drmModePlaneRes *kplane_res;
drmModePlane *kplane;
struct drm_plane *drm_plane;
uint32_t i;
uint32_t next_plane_idx = 0;
kplane_res = drmModeGetPlaneResources(device->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(device->drm.fd, kplane_res->planes[i]);
if (!kplane)
continue;
drm_plane = drm_plane_create(device, kplane);
drmModeFreePlane(kplane);
if (!drm_plane)
continue;
if (drm_plane->type == WDRM_PLANE_TYPE_OVERLAY)
weston_compositor_stack_plane(b->compositor,
&drm_plane->base,
NULL);
}
wl_list_for_each (drm_plane, &device->plane_list, link)
drm_plane->plane_idx = next_plane_idx++;
drmModeFreePlaneResources(kplane_res);
}
/**
* Clean up sprites (overlay planes)
*
* The counterpart to create_sprites.
*
* @param device DRM device
*/
static void
destroy_sprites(struct drm_device *device)
{
struct drm_plane *plane, *next;
wl_list_for_each_safe(plane, next, &device->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_device *device = output->device;
struct drm_pending_state *pending_state = device->repaint_data;
struct drm_output_state *state;
int ret;
assert(output);
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 = false;
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 = true;
return;
}
pending_state = drm_pending_state_alloc(device);
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",
[DRM_MODE_CONNECTOR_VIRTUAL] = "Virtual",
[DRM_MODE_CONNECTOR_DSI] = "DSI",
[DRM_MODE_CONNECTOR_DPI] = "DPI",
};
/** 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 int
drm_output_init_pixman(struct drm_output *output, struct drm_backend *b)
{
struct weston_renderer *renderer = output->base.compositor->renderer;
const struct pixman_renderer_interface *pixman = renderer->pixman;
struct drm_device *device = output->device;
int w = output->base.current_mode->width;
int h = output->base.current_mode->height;
unsigned int i;
const struct pixman_renderer_output_options options = {
.use_shadow = b->use_pixman_shadow,
.fb_size = { .width = w, .height = h },
.format = output->format
};
assert(options.format);
if (!options.format->pixman_format) {
weston_log("Unsupported pixel format %s\n",
options.format->drm_format_name);
return -1;
}
if (pixman->output_create(&output->base, &options) < 0)
goto err;
/* FIXME error checking */
for (i = 0; i < ARRAY_LENGTH(output->dumb); i++) {
output->dumb[i] = drm_fb_create_dumb(device, w, h,
options.format->format);
if (!output->dumb[i])
goto err;
output->renderbuffer[i] =
pixman->create_image_from_ptr(&output->base,
options.format, w, h,
output->dumb[i]->map,
output->dumb[i]->strides[0]);
if (!output->renderbuffer[i])
goto err;
pixman_region32_init_rect(&output->renderbuffer[i]->damage,
output->base.pos.c.x,
output->base.pos.c.y,
output->base.width,
output->base.height);
}
weston_log("DRM: output %s %s shadow framebuffer.\n", output->base.name,
b->use_pixman_shadow ? "uses" : "does not use");
return 0;
err:
for (i = 0; i < ARRAY_LENGTH(output->dumb); i++) {
if (output->dumb[i])
drm_fb_unref(output->dumb[i]);
if (output->renderbuffer[i])
weston_renderbuffer_unref(output->renderbuffer[i]);
output->dumb[i] = NULL;
output->renderbuffer[i] = NULL;
}
pixman->output_destroy(&output->base);
return -1;
}
static void
drm_output_fini_pixman(struct drm_output *output)
{
struct weston_renderer *renderer = output->base.compositor->renderer;
struct drm_backend *b = output->backend;
unsigned int i;
/* Destroying the Pixman surface will destroy all our buffers,
* regardless of refcount. Ensure we destroy them here. */
if (!b->compositor->shutting_down &&
output->scanout_plane->state_cur->fb &&
output->scanout_plane->state_cur->fb->type == BUFFER_PIXMAN_DUMB) {
drm_plane_reset_state(output->scanout_plane);
}
for (i = 0; i < ARRAY_LENGTH(output->dumb); i++) {
weston_renderbuffer_unref(output->renderbuffer[i]);
drm_fb_unref(output->dumb[i]);
output->dumb[i] = NULL;
output->renderbuffer[i] = NULL;
}
renderer->pixman->output_destroy(&output->base);
}
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)
pointer->pos = weston_pointer_clamp(pointer,
pointer->pos);
}
}
static int
drm_output_attach_head(struct weston_output *output_base,
struct weston_head *head_base)
{
struct drm_output *output = to_drm_output(output_base);
struct drm_backend *b = output->backend;
struct drm_device *device = b->drm;
struct drm_head *head = to_drm_head(head_base);
if (wl_list_length(&output_base->head_list) >= MAX_CLONED_CONNECTORS)
return -1;
wl_list_remove(&head->disable_head_link);
wl_list_init(&head->disable_head_link);
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?
*/
device->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_output *output = to_drm_output(output_base);
struct drm_head *head = to_drm_head(head_base);
if (!output_base->enabled)
return;
/* Drop connectors that should no longer be driven on next repaint. */
wl_list_remove(&head->disable_head_link);
wl_list_insert(&output->disable_head, &head->disable_head_link);
}
int
parse_gbm_format(const char *s, const struct pixel_format_info *default_format,
const struct pixel_format_info **format)
{
if (s == NULL) {
*format = default_format;
return 0;
}
/* GBM formats and DRM formats are identical. */
*format = pixel_format_get_info_by_drm_name(s);
if (!*format) {
weston_log("fatal: unrecognized pixel format: %s\n", s);
return -1;
}
return 0;
}
static int
drm_head_read_current_setup(struct drm_head *head, struct drm_device *device)
{
int drm_fd = device->drm.fd;
drmModeConnector *conn = head->connector.conn;
drmModeEncoder *encoder;
drmModeCrtc *crtc;
/* Get the current mode on the crtc that's currently driving
* this connector. */
encoder = drmModeGetEncoder(drm_fd, conn->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);
}
/* Get the current max_bpc that's currently configured to
* this connector. */
head->inherited_max_bpc = drm_property_get_value(
&head->connector.props[WDRM_CONNECTOR_MAX_BPC],
head->connector.props_drm, 0);
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);
if (parse_gbm_format(gbm_format, NULL, &output->format) == -1)
output->format = NULL;
}
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 = output->backend;
setup_output_seat_constraint(b, &output->base,
seat ? seat : "");
}
static void
drm_output_set_max_bpc(struct weston_output *base, unsigned max_bpc)
{
struct drm_output *output = to_drm_output(base);
assert(output);
assert(!output->base.enabled);
output->max_bpc = max_bpc;
}
static const struct { const char *name; uint32_t token; } content_types[] = {
{ "no data", WDRM_CONTENT_TYPE_NO_DATA },
{ "graphics", WDRM_CONTENT_TYPE_GRAPHICS },
{ "photo", WDRM_CONTENT_TYPE_PHOTO },
{ "cinema", WDRM_CONTENT_TYPE_CINEMA },
{ "game", WDRM_CONTENT_TYPE_GAME },
};
static int
drm_output_set_content_type(struct weston_output *base,
const char *content_type)
{
unsigned int i;
struct drm_output *output = to_drm_output(base);
if (content_type == NULL) {
output->content_type = WDRM_CONTENT_TYPE_NO_DATA;
return 0;
}
for (i = 0; i < ARRAY_LENGTH(content_types); i++)
if (strcmp(content_types[i].name, content_type) == 0) {
output->content_type = content_types[i].token;
return 0;
}
weston_log("Error: unknown content-type for output %s: \"%s\"\n",
base->name, content_type);
output->content_type = WDRM_CONTENT_TYPE_NO_DATA;
return -1;
}
static int
drm_output_init_gamma_size(struct drm_output *output)
{
struct drm_device *device = output->device;
drmModeCrtc *crtc;
assert(output->base.compositor);
assert(output->crtc);
crtc = drmModeGetCrtc(device->drm.fd, output->crtc->crtc_id);
if (!crtc)
return -1;
output->base.gamma_size = crtc->gamma_size;
drmModeFreeCrtc(crtc);
return 0;
}
enum writeback_screenshot_state
drm_output_get_writeback_state(struct drm_output *output)
{
if (!output->wb_state)
return DRM_OUTPUT_WB_SCREENSHOT_OFF;
return output->wb_state->state;
}
/** Pick a CRTC that might be able to drive all attached connectors
*
* @param output The output whose attached heads to include.
* @return CRTC object to pick, or NULL on failure or not found.
*/
static struct drm_crtc *
drm_output_pick_crtc(struct drm_output *output)
{
struct drm_device *device = output->device;
struct drm_backend *backend = device->backend;
struct weston_compositor *compositor = backend->compositor;
struct weston_head *base;
struct drm_head *head;
struct drm_crtc *crtc;
struct drm_crtc *best_crtc = NULL;
struct drm_crtc *fallback_crtc = NULL;
struct drm_crtc *existing_crtc[32];
uint32_t possible_crtcs = 0xffffffff;
unsigned n = 0;
uint32_t crtc_id;
unsigned int i;
bool match;
/* 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_connector_get_possible_crtcs_mask(&head->connector);
crtc_id = head->inherited_crtc_id;
if (crtc_id > 0 && n < ARRAY_LENGTH(existing_crtc))
existing_crtc[n++] = drm_crtc_find(device, crtc_id);
}
/* Find a crtc that could drive each connector individually at least,
* and prefer existing routings. */
wl_list_for_each(crtc, &device->crtc_list, link) {
/* Could the crtc not drive each connector? */
if (!(possible_crtcs & (1 << crtc->pipe)))
continue;
/* Is the crtc already in use? */
if (crtc->output)
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 (i = 0; i < n; i++) {
if (existing_crtc[i] == crtc)
return crtc;
}
/* 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, &compositor->head_list, compositor_link) {
head = to_drm_head(base);
if (!head)
continue;
if (head->base.output == &output->base)
continue;
if (weston_head_is_enabled(&head->base))
continue;
if (head->inherited_crtc_id == crtc->crtc_id) {
match = true;
break;
}
}
if (!match)
best_crtc = crtc;
fallback_crtc = crtc;
}
if (best_crtc)
return best_crtc;
if (fallback_crtc)
return fallback_crtc;
/* 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 (i = 0; i < n; i++) {
crtc = existing_crtc[i];
if (!crtc->output)
return crtc;
}
/* Otherwise pick any available crtc. */
wl_list_for_each(crtc, &device->crtc_list, link) {
if (!crtc->output)
return crtc;
}
return NULL;
}
/** Create an "empty" drm_crtc. It will only set its ID, pipe and props. After
* all, it adds the object to the DRM-backend CRTC list.
*/
static struct drm_crtc *
drm_crtc_create(struct drm_device *device, uint32_t crtc_id, uint32_t pipe)
{
struct drm_crtc *crtc;
drmModeObjectPropertiesPtr props;
props = drmModeObjectGetProperties(device->drm.fd, crtc_id,
DRM_MODE_OBJECT_CRTC);
if (!props) {
weston_log("failed to get CRTC properties\n");
return NULL;
}
crtc = zalloc(sizeof(*crtc));
if (!crtc)
goto ret;
drm_property_info_populate(device, crtc_props, crtc->props_crtc,
WDRM_CRTC__COUNT, props);
crtc->device = device;
crtc->crtc_id = crtc_id;
crtc->pipe = pipe;
crtc->output = NULL;
/* Add it to the last position of the DRM-backend CRTC list */
wl_list_insert(device->crtc_list.prev, &crtc->link);
ret:
drmModeFreeObjectProperties(props);
return crtc;
}
/** Destroy a drm_crtc object that was created with drm_crtc_create(). It will
* also remove it from the DRM-backend CRTC list.
*/
static void
drm_crtc_destroy(struct drm_crtc *crtc)
{
assert(!crtc->output);
wl_list_remove(&crtc->link);
drm_property_info_free(crtc->props_crtc, WDRM_CRTC__COUNT);
free(crtc);
}
/** Find all CRTCs of the fd and create drm_crtc objects for them.
*
* The CRTCs are saved in a list of the drm_backend and will keep there until
* the fd gets closed.
*
* @param device The DRM device structure.
* @param resources The DRM resources, it is taken with drmModeGetResources
* @return 0 on success (at least one CRTC in the list), -1 on failure.
*/
static int
drm_backend_create_crtc_list(struct drm_device *device, drmModeRes *resources)
{
struct drm_crtc *crtc, *crtc_tmp;
int i;
/* Iterate through all CRTCs */
for (i = 0; i < resources->count_crtcs; i++) {
/* Let's create an object for the CRTC and add it to the list */
crtc = drm_crtc_create(device, resources->crtcs[i], i);
if (!crtc)
goto err;
}
return 0;
err:
wl_list_for_each_safe(crtc, crtc_tmp, &device->crtc_list, link)
drm_crtc_destroy(crtc);
return -1;
}
/** Populates scanout and cursor planes for the output. Also sets the topology
* of the planes by adding them to the plane stacking list.
*/
static int
drm_output_init_planes(struct drm_output *output)
{
struct drm_backend *b = output->backend;
struct drm_device *device = output->device;
output->scanout_plane =
drm_output_find_special_plane(device, output,
WDRM_PLANE_TYPE_PRIMARY);
if (!output->scanout_plane) {
weston_log("Failed to find primary plane for output %s\n",
output->base.name);
return -1;
}
weston_compositor_stack_plane(b->compositor,
&output->scanout_plane->base,
&output->base.primary_plane);
/* 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(device, output,
WDRM_PLANE_TYPE_CURSOR);
if (output->cursor_plane)
weston_compositor_stack_plane(b->compositor,
&output->cursor_plane->base,
NULL);
else
device->cursors_are_broken = true;
return 0;
}
/** The opposite of drm_output_init_planes(). First of all it removes the planes
* from the plane stacking list. After all it sets the planes of the output as NULL.
*/
static void
drm_output_deinit_planes(struct drm_output *output)
{
struct drm_backend *b = output->backend;
struct drm_device *device = output->device;
/* If the compositor is already shutting down, the planes have already
* been destroyed. */
if (!b->compositor->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(device->drm.fd, output->crtc->crtc_id, 0, 0, 0);
}
/* With universal planes, the 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.
*/
if (output->cursor_plane)
drm_plane_reset_state(output->cursor_plane);
if (output->scanout_plane)
drm_plane_reset_state(output->scanout_plane);
}
output->cursor_plane = NULL;
output->scanout_plane = NULL;
}
static struct weston_drm_format_array *
get_scanout_formats(struct drm_device *device)
{
struct weston_compositor *ec = device->backend->compositor;
const struct weston_drm_format_array *renderer_formats;
struct weston_drm_format_array *scanout_formats, union_planes_formats;
struct drm_plane *plane;
int ret;
/* If we got here it means that dma-buf feedback is supported and that
* the renderer has formats/modifiers to expose. */
assert(ec->renderer->get_supported_formats != NULL);
renderer_formats = ec->renderer->get_supported_formats(ec);
scanout_formats = zalloc(sizeof(*scanout_formats));
if (!scanout_formats) {
weston_log("%s: out of memory\n", __func__);
return NULL;
}
weston_drm_format_array_init(&union_planes_formats);
weston_drm_format_array_init(scanout_formats);
/* Compute the union of the format/modifiers of the KMS planes */
wl_list_for_each(plane, &device->plane_list, link) {
/* The scanout formats are used by the dma-buf feedback. But for
* now cursor planes do not support dma-buf buffers, only wl_shm
* buffers. So we skip cursor planes here. */
if (plane->type == WDRM_PLANE_TYPE_CURSOR)
continue;
ret = weston_drm_format_array_join(&union_planes_formats,
&plane->formats);
if (ret < 0)
goto err;
}
/* Compute the intersection between the union of format/modifiers of KMS
* planes and the formats supported by the renderer */
ret = weston_drm_format_array_replace(scanout_formats,
renderer_formats);
if (ret < 0)
goto err;
ret = weston_drm_format_array_intersect(scanout_formats,
&union_planes_formats);
if (ret < 0)
goto err;
weston_drm_format_array_fini(&union_planes_formats);
return scanout_formats;
err:
weston_drm_format_array_fini(&union_planes_formats);
weston_drm_format_array_fini(scanout_formats);
free(scanout_formats);
return NULL;
}
/** Pick a CRTC and reserve it for the output.
*
* On failure, the output remains without a CRTC.
*
* @param output The output with no CRTC associated.
* @return 0 on success, -1 on failure.
*/
static int
drm_output_attach_crtc(struct drm_output *output)
{
output->crtc = drm_output_pick_crtc(output);
if (!output->crtc) {
weston_log("Output '%s': No available CRTCs.\n",
output->base.name);
return -1;
}
/* Reserve the CRTC for the output */
output->crtc->output = output;
return 0;
}
/** Release reservation of the CRTC.
*
* Make the CRTC free to be reserved and used by another output.
*
* @param output The output that will release its CRTC.
*/
static void
drm_output_detach_crtc(struct drm_output *output)
{
struct drm_crtc *crtc = output->crtc;
crtc->output = NULL;
output->crtc = NULL;
}
static bool
should_wait_drm_events(struct drm_device *device)
{
struct weston_output *base;
struct drm_output *output;
wl_list_for_each(base, &device->backend->compositor->output_list, link) {
/* We only care about outputs related to the DRM backend. */
output = to_drm_output(base);
if (!output)
continue;
/* We only care about the outputs on our device. */
if (output->device != device)
continue;
if (output->destroy_pending || output->disable_pending)
return true;
}
return false;
}
static int
drm_output_enable(struct weston_output *base)
{
struct drm_output *output = to_drm_output(base);
struct drm_device *device = output->device;
struct drm_backend *b = device->backend;
int ret;
assert(output);
assert(!output->virtual);
/* TODO: drop this hack when we rework the output configuration API. For
* now we need this because the frontend may call
* weston_output_destroy() or weston_output_disable() but it may have a
* pending page flip. In such case the destruction is delayed, but the
* frontend can't tell that. Until the flip completes, the DRM objects
* of the card (CRTC, planes, etc) won't be available, as they will
* still be attached to the output marked to be destroyed/disabled. So
* if the frontend calls weston_output_enable() for an output right
* after weston_output_destroy() or weston_output_disable(), it might
* not find DRM objects available and fail. So we spin here until the
* flip completes and the output gets destroyed/disabled and release the
* DRM objects. */
while (should_wait_drm_events(device))
on_drm_input(device->drm.fd, 0 /* unused mask */, device);
if (!output->format) {
if (output->base.eotf_mode != WESTON_EOTF_MODE_SDR)
output->format =
pixel_format_get_info(DRM_FORMAT_XRGB2101010);
else
output->format = b->format;
}
ret = drm_output_attach_crtc(output);
if (ret < 0)
return -1;
ret = drm_output_init_planes(output);
if (ret < 0)
goto err_crtc;
if (drm_output_init_gamma_size(output) < 0)
goto err_planes;
if (b->pageflip_timeout)
drm_output_pageflip_timer_create(output);
if (b->compositor->renderer->type == WESTON_RENDERER_PIXMAN) {
if (drm_output_init_pixman(output, b) < 0) {
weston_log("Failed to init output pixman state\n");
goto err_planes;
}
} else if (drm_output_init_egl(output, b) < 0) {
weston_log("Failed to init output gl state\n");
goto err_planes;
}
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 (device->atomic_modeset)
weston_output_update_capture_info(base, WESTON_OUTPUT_CAPTURE_SOURCE_WRITEBACK,
base->current_mode->width,
base->current_mode->height,
pixel_format_get_info(output->format->format));
weston_log("Output %s (crtc %d) video modes:\n",
output->base.name, output->crtc->crtc_id);
drm_output_print_modes(output);
return 0;
err_planes:
drm_output_deinit_planes(output);
err_crtc:
drm_output_detach_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 = output->backend;
struct drm_device *device = output->device;
struct drm_pending_state *pending;
if (!b->compositor->shutting_down) {
pending = drm_pending_state_alloc(device);
drm_output_get_disable_state(pending, output);
drm_pending_state_apply_sync(pending);
}
if (b->compositor->renderer->type == WESTON_RENDERER_PIXMAN)
drm_output_fini_pixman(output);
else
drm_output_fini_egl(output);
drm_output_deinit_planes(output);
drm_output_detach_crtc(output);
if (output->hdr_output_metadata_blob_id) {
drmModeDestroyPropertyBlob(device->drm.fd,
output->hdr_output_metadata_blob_id);
output->hdr_output_metadata_blob_id = 0;
}
}
void
drm_output_destroy(struct weston_output *base)
{
struct drm_output *output = to_drm_output(base);
struct drm_device *device = output->device;
assert(output);
assert(!output->virtual);
if (output->page_flip_pending || output->atomic_complete_pending) {
if (!base->compositor->shutting_down) {
/* We are not shutting down, so we can wait for flip
* completion. */
output->destroy_pending = true;
weston_log("delaying output destruction because of a " \
"pending flip, wait until it completes\n");
return;
} else {
weston_log("destroying output %s (id %u) with a pending " \
"flip, but as we are shutting down we can't " \
"wait to destroy it when the flip completes... " \
"destroying it now\n", base->name, base->id);
}
}
drm_output_set_cursor_view(output, NULL);
if (output->base.enabled)
drm_output_deinit(&output->base);
drm_mode_list_destroy(device, &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);
assert(output->hdr_output_metadata_blob_id == 0);
wl_list_remove(&output->disable_head);
free(output);
}
static int
drm_output_disable(struct weston_output *base)
{
struct drm_output *output = to_drm_output(base);
assert(output);
assert(!output->virtual);
if (output->page_flip_pending || output->atomic_complete_pending) {
output->disable_pending = true;
return -1;
}
weston_log("Disabling output %s\n", output->base.name);
if (output->base.enabled)
drm_output_deinit(&output->base);
output->disable_pending = false;
return 0;
}
/*
* This function converts the protection status from drm values to
* weston_hdcp_protection status. The drm values as read from the connector
* properties "Content Protection" and "HDCP Content Type" need to be converted
* to appropriate weston values, that can be sent to a client application.
*/
static int
get_weston_protection_from_drm(enum wdrm_content_protection_state protection,
enum wdrm_hdcp_content_type type,
enum weston_hdcp_protection *weston_protection)
{
if (protection >= WDRM_CONTENT_PROTECTION__COUNT)
return -1;
if (protection == WDRM_CONTENT_PROTECTION_DESIRED ||
protection == WDRM_CONTENT_PROTECTION_UNDESIRED) {
*weston_protection = WESTON_HDCP_DISABLE;
return 0;
}
if (type >= WDRM_HDCP_CONTENT_TYPE__COUNT)
return -1;
if (type == WDRM_HDCP_CONTENT_TYPE0) {
*weston_protection = WESTON_HDCP_ENABLE_TYPE_0;
return 0;
}
if (type == WDRM_HDCP_CONTENT_TYPE1) {
*weston_protection = WESTON_HDCP_ENABLE_TYPE_1;
return 0;
}
return -1;
}
/**
* Get current content-protection status for a given head.
*
* @param head drm_head, whose protection is to be retrieved
* @return protection status in case of success, -1 otherwise
*/
static enum weston_hdcp_protection
drm_head_get_current_protection(struct drm_head *head)
{
drmModeObjectProperties *props = head->connector.props_drm;
struct drm_property_info *info;
enum wdrm_content_protection_state protection;
enum wdrm_hdcp_content_type type;
enum weston_hdcp_protection weston_hdcp = WESTON_HDCP_DISABLE;
info = &head->connector.props[WDRM_CONNECTOR_CONTENT_PROTECTION];
protection = drm_property_get_value(info, props,
WDRM_CONTENT_PROTECTION__COUNT);
if (protection == WDRM_CONTENT_PROTECTION__COUNT)
return WESTON_HDCP_DISABLE;
info = &head->connector.props[WDRM_CONNECTOR_HDCP_CONTENT_TYPE];
type = drm_property_get_value(info, props,
WDRM_HDCP_CONTENT_TYPE__COUNT);
/*
* In case of platforms supporting HDCP1.4, only property
* 'Content Protection' is exposed and not the 'HDCP Content Type'
* for such cases HDCP Type 0 should be considered as the content-type.
*/
if (type == WDRM_HDCP_CONTENT_TYPE__COUNT)
type = WDRM_HDCP_CONTENT_TYPE0;
if (get_weston_protection_from_drm(protection, type,
&weston_hdcp) == -1) {
weston_log("Invalid drm protection:%d type:%d, for head:%s connector-id:%d\n",
protection, type, head->base.name,
head->connector.connector_id);
return WESTON_HDCP_DISABLE;
}
return weston_hdcp;
}
static int
drm_connector_update_properties(struct drm_connector *connector)
{
struct drm_device *device = connector->device;
drmModeObjectProperties *props;
props = drmModeObjectGetProperties(device->drm.fd,
connector->connector_id,
DRM_MODE_OBJECT_CONNECTOR);
if (!props) {
weston_log("Error: failed to get connector properties\n");
return -1;
}
if (connector->props_drm)
drmModeFreeObjectProperties(connector->props_drm);
connector->props_drm = props;
return 0;
}
/** Replace connector data and monitor information
*
* @param connector The drm_connector object to be updated.
* @param conn The connector data to be owned by the drm_connector, must match
* the current drm_connector ID.
* @return 0 on success, -1 on failure.
*
* Takes ownership of @c connector on success, not on failure.
*/
static int
drm_connector_assign_connector_info(struct drm_connector *connector,
drmModeConnector *conn)
{
struct drm_device *device = connector->device;
assert(connector->conn != conn);
assert(connector->connector_id == conn->connector_id);
if (drm_connector_update_properties(connector) < 0)
return -1;
if (connector->conn)
drmModeFreeConnector(connector->conn);
connector->conn = conn;
drm_property_info_free(connector->props, WDRM_CONNECTOR__COUNT);
drm_property_info_populate(device, connector_props, connector->props,
WDRM_CONNECTOR__COUNT, connector->props_drm);
return 0;
}
static void
drm_connector_init(struct drm_device *device, struct drm_connector *connector,
uint32_t connector_id)
{
connector->device = device;
connector->connector_id = connector_id;
connector->conn = NULL;
connector->props_drm = NULL;
}
static void
drm_connector_fini(struct drm_connector *connector)
{
drmModeFreeConnector(connector->conn);
drmModeFreeObjectProperties(connector->props_drm);
drm_property_info_free(connector->props, WDRM_CONNECTOR__COUNT);
}
static void
drm_head_log_info(struct drm_head *head, const char *msg)
{
char *str;
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.connector_id,
head->base.make, head->base.model,
head->base.serial_number ?: "");
str = weston_eotf_mask_to_str(head->base.supported_eotf_mask);
if (str) {
weston_log_continue(STAMP_SPACE
"Supported EOTF modes: %s\n",
str);
}
free(str);
} else {
weston_log("DRM: head '%s' %s, connector %d is disconnected.\n",
head->base.name, msg, head->connector.connector_id);
}
}
/** Update connector and monitor information
*
* @param head The head to update.
* @param conn The DRM connector object.
* @returns 0 on success, -1 on failure.
*
* Updates monitor information and connection status. This may schedule a
* heads changed call to the user.
*
* Takes ownership of @c connector on success, not on failure.
*/
static int
drm_head_update_info(struct drm_head *head, drmModeConnector *conn)
{
int ret;
ret = drm_connector_assign_connector_info(&head->connector, conn);
update_head_from_connector(head);
weston_head_set_content_protection_status(&head->base,
drm_head_get_current_protection(head));
return ret;
}
/** Update writeback connector
*
* @param writeback The writeback to update.
* @param conn DRM connector object.
* @returns 0 on success, -1 on failure.
*
* Takes ownership of @c connector on success, not on failure.
*/
static int
drm_writeback_update_info(struct drm_writeback *writeback, drmModeConnector *conn)
{
int ret;
ret = drm_connector_assign_connector_info(&writeback->connector, conn);
return ret;
}
/**
* 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 device DRM device structure
* @param conn DRM connector object
* @param drm_device udev device pointer
* @returns 0 on success, -1 on failure
*
* Takes ownership of @c connector on success, not on failure.
*/
static int
drm_head_create(struct drm_device *device, drmModeConnector *conn,
struct udev_device *drm_device)
{
struct drm_backend *backend = device->backend;
struct drm_head *head;
char *name;
int ret;
head = zalloc(sizeof *head);
if (!head)
return -1;
drm_connector_init(device, &head->connector, conn->connector_id);
name = make_connector_name(conn);
if (!name)
goto err;
weston_head_init(&head->base, name);
free(name);
head->base.backend = &backend->base;
wl_list_init(&head->disable_head_link);
ret = drm_head_update_info(head, conn);
if (ret < 0)
goto err_update;
head->backlight = backlight_init(drm_device, conn->connector_type);
if (conn->connector_type == DRM_MODE_CONNECTOR_LVDS ||
conn->connector_type == DRM_MODE_CONNECTOR_eDP)
weston_head_set_internal(&head->base);
if (drm_head_read_current_setup(head, device) < 0) {
weston_log("Failed to retrieve current mode from connector %d.\n",
head->connector.connector_id);
/* Not fatal. */
}
weston_compositor_add_head(backend->compositor, &head->base);
drm_head_log_info(head, "found");
return 0;
err_update:
weston_head_release(&head->base);
err:
drm_connector_fini(&head->connector);
free(head);
return -1;
}
static void
drm_head_destroy(struct weston_head *base)
{
struct drm_head *head = to_drm_head(base);
assert(head);
weston_head_release(&head->base);
drm_connector_fini(&head->connector);
if (head->backlight)
backlight_destroy(head->backlight);
wl_list_remove(&head->disable_head_link);
free(head->display_data);
free(head);
}
static struct drm_device *
drm_device_find_by_output(struct weston_compositor *compositor, const char *name)
{
struct drm_device *device = NULL;
struct weston_head *base = NULL;
struct drm_head *head;
const char *tmp;
while ((base = weston_compositor_iterate_heads(compositor, base))) {
tmp = weston_head_get_name(base);
if (strcmp(name, tmp) != 0)
continue;
head = to_drm_head(base);
device = head->connector.device;
break;
}
return device;
}
/**
* 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 backend The backend instance.
* @param name Name for the new output.
* @returns The output, or NULL on failure.
*/
static struct weston_output *
drm_output_create(struct weston_backend *backend, const char *name)
{
struct drm_backend *b = container_of(backend, struct drm_backend, base);
struct drm_device *device;
struct drm_output *output;
device = drm_device_find_by_output(b->compositor, name);
if (!device)
return NULL;
output = zalloc(sizeof *output);
if (output == NULL)
return NULL;
output->device = device;
output->crtc = NULL;
wl_list_init(&output->disable_head);
output->max_bpc = 16;
#ifdef BUILD_DRM_GBM
output->gbm_bo_flags = GBM_BO_USE_SCANOUT | GBM_BO_USE_RENDERING;
#endif
weston_output_init(&output->base, b->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->backend = b;
output->destroy_pending = false;
output->disable_pending = false;
output->state_cur = drm_output_state_alloc(output, NULL);
weston_compositor_add_pending_output(&output->base, b->compositor);
return &output->base;
}
static void
pixman_copy_screenshot(uint32_t *dst, uint32_t *src, int dst_stride,
int src_stride, int pixman_format, int width, int height)
{
pixman_image_t *pixman_dst;
pixman_image_t *pixman_src;
pixman_src = pixman_image_create_bits(pixman_format,
width, height,
src, src_stride);
pixman_dst = pixman_image_create_bits(pixman_format,
width, height,
dst, dst_stride);
assert(pixman_src);
assert(pixman_dst);
pixman_image_composite32(PIXMAN_OP_SRC,
pixman_src, /* src */
NULL, /* mask */
pixman_dst, /* dst */
0, 0, /* src_x, src_y */
0, 0, /* mask_x, mask_y */
0, 0, /* dst_x, dst_y */
width, height); /* width, height */
pixman_image_unref(pixman_src);
pixman_image_unref(pixman_dst);
}
static void
drm_writeback_success_screenshot(struct drm_writeback_state *state)
{
struct drm_output *output = state->output;
struct weston_buffer *buffer =
weston_capture_task_get_buffer(state->ct);
int width, height;
int dst_stride, src_stride;
uint32_t *src, *dst;
src = state->fb->map;
src_stride = state->fb->strides[0];
dst = wl_shm_buffer_get_data(buffer->shm_buffer);
dst_stride = wl_shm_buffer_get_stride(buffer->shm_buffer);
width = state->fb->width;
height = state->fb->height;
wl_shm_buffer_begin_access(buffer->shm_buffer);
pixman_copy_screenshot(dst, src, dst_stride, src_stride,
buffer->pixel_format->pixman_format,
width, height);
wl_shm_buffer_end_access(buffer->shm_buffer);
weston_capture_task_retire_complete(state->ct);
drm_writeback_state_free(state);
output->wb_state = NULL;
}
void
drm_writeback_fail_screenshot(struct drm_writeback_state *state,
const char *err_msg)
{
struct drm_output *output = state->output;
weston_capture_task_retire_failed(state->ct, err_msg);
drm_writeback_state_free(state);
output->wb_state = NULL;
}
static int
drm_writeback_save_callback(int fd, uint32_t mask, void *data)
{
struct drm_writeback_state *state = data;
wl_event_source_remove(state->wb_source);
close(fd);
drm_writeback_success_screenshot(state);
return 0;
}
static bool
drm_writeback_has_finished(struct drm_writeback_state *state)
{
struct pollfd pollfd;
int ret;
pollfd.fd = state->out_fence_fd;
pollfd.events = POLLIN;
while ((ret = poll(&pollfd, 1, 0)) == -1 && errno == EINTR)
continue;
if (ret < 0) {
drm_writeback_fail_screenshot(state, "drm: polling wb fence failed");
return true;
} else if (ret > 0) {
/* fence already signaled, simply save the screenshot */
drm_writeback_success_screenshot(state);
return true;
}
/* poll() returned 0, what means that out fence was not signalled yet */
return false;
}
bool
drm_writeback_should_wait_completion(struct drm_writeback_state *state)
{
struct weston_compositor *ec = state->output->base.compositor;
struct wl_event_loop *event_loop;
if (state->state == DRM_OUTPUT_WB_SCREENSHOT_WAITING_SIGNAL)
return true;
if (state->state == DRM_OUTPUT_WB_SCREENSHOT_CHECK_FENCE) {
if (drm_writeback_has_finished(state))
return false;
/* The writeback has not finished yet. So add callback that gets
* called when the sync fd of the writeback job gets signalled.
* We need to wait for that to resume the repaint loop. */
event_loop = wl_display_get_event_loop(ec->wl_display);
state->wb_source =
wl_event_loop_add_fd(event_loop, state->out_fence_fd,
WL_EVENT_READABLE,
drm_writeback_save_callback, state);
if (!state->wb_source) {
drm_writeback_fail_screenshot(state, "drm: out of memory");
return false;
}
state->state = DRM_OUTPUT_WB_SCREENSHOT_WAITING_SIGNAL;
return true;
}
return false;
}
void
drm_writeback_reference_planes(struct drm_writeback_state *state,
struct wl_list *plane_state_list)
{
struct drm_plane_state *plane_state;
struct drm_fb **fb;
wl_list_for_each(plane_state, plane_state_list, link) {
if (!plane_state->fb)
continue;
fb = wl_array_add(&state->referenced_fbs, sizeof(*fb));
*fb = drm_fb_ref(plane_state->fb);
}
}
static int
drm_writeback_populate_formats(struct drm_writeback *wb)
{
struct drm_property_info *info = wb->connector.props;
drmModeObjectProperties *props = wb->connector.props_drm;
uint64_t blob_id;
drmModePropertyBlobPtr blob;
uint32_t *blob_formats;
unsigned int i;
int ret = 0;
blob_id = drm_property_get_value(&info[WDRM_CONNECTOR_WRITEBACK_PIXEL_FORMATS],
props, 0);
if (blob_id == 0)
return -1;
blob = drmModeGetPropertyBlob(wb->device->drm.fd, blob_id);
if (!blob)
return -1;
blob_formats = blob->data;
for (i = 0; i < blob->length / sizeof(uint32_t); i++) {
if (!weston_drm_format_array_add_format(&wb->formats,
blob_formats[i])) {
ret = -1;
break;
}
}
drmModeFreePropertyBlob(blob);
return ret;
}
/**
* Create a Weston writeback for a writeback connector
*
* Given a DRM connector of type writeback, create a matching drm_writeback
* structure and add it to Weston's writeback list.
*
* @param device DRM device structure
* @param conn DRM connector object of type writeback
* @returns 0 on success, -1 on failure
*
* Takes ownership of @c connector on success, not on failure.
*/
static int
drm_writeback_create(struct drm_device *device, drmModeConnector *conn)
{
struct drm_writeback *writeback;
int ret;
writeback = zalloc(sizeof *writeback);
assert(writeback);
writeback->device = device;
drm_connector_init(device, &writeback->connector, conn->connector_id);
ret = drm_writeback_update_info(writeback, conn);
if (ret < 0)
goto err;
weston_drm_format_array_init(&writeback->formats);
ret = drm_writeback_populate_formats(writeback);
if (ret < 0)
goto err_formats;
wl_list_insert(&device->writeback_connector_list, &writeback->link);
return 0;
err_formats:
weston_drm_format_array_fini(&writeback->formats);
err:
drm_connector_fini(&writeback->connector);
free(writeback);
return -1;
}
static void
drm_writeback_destroy(struct drm_writeback *writeback)
{
drm_connector_fini(&writeback->connector);
weston_drm_format_array_fini(&writeback->formats);
wl_list_remove(&writeback->link);
free(writeback);
}
/** Given the DRM connector object of a connector, create drm_head or
* drm_writeback object (depending on the type of connector) for it.
*
* The object is then added to the DRM-backend list of heads or writebacks.
*
* @param device The DRM device structure
* @param conn The DRM connector object
* @param drm_device udev device pointer
* @return 0 on success, -1 on failure
*/
static int
drm_backend_add_connector(struct drm_device *device, drmModeConnector *conn,
struct udev_device *drm_device)
{
int ret;
if (conn->connector_type == DRM_MODE_CONNECTOR_WRITEBACK) {
ret = drm_writeback_create(device, conn);
if (ret < 0)
weston_log("DRM: failed to create writeback for connector %d.\n",
conn->connector_id);
} else {
ret = drm_head_create(device, conn, drm_device);
if (ret < 0)
weston_log("DRM: failed to create head for connector %d.\n",
conn->connector_id);
}
return ret;
}
/** Find all connectors of the fd and create drm_head or drm_writeback objects
* (depending on the type of connector they are) for each of them
*
* These objects are added to the DRM-backend lists of heads and writebacks.
*
* @param device The DRM device structure
* @param drm_device udev device pointer
* @param resources The DRM resources, it is taken with drmModeGetResources
* @return 0 on success, -1 on failure
*/
static int
drm_backend_discover_connectors(struct drm_device *device,
struct udev_device *drm_device,
drmModeRes *resources)
{
drmModeConnector *conn;
int i, ret;
device->min_width = resources->min_width;
device->max_width = resources->max_width;
device->min_height = resources->min_height;
device->max_height = resources->max_height;
for (i = 0; i < resources->count_connectors; i++) {
uint32_t connector_id = resources->connectors[i];
conn = drmModeGetConnector(device->drm.fd, connector_id);
if (!conn)
continue;
ret = drm_backend_add_connector(device, conn, drm_device);
if (ret < 0)
drmModeFreeConnector(conn);
}
return 0;
}
static bool
resources_has_connector(drmModeRes *resources, uint32_t connector_id)
{
for (int i = 0; i < resources->count_connectors; i++) {
if (resources->connectors[i] == connector_id)
return true;
}
return false;
}
static void
drm_backend_update_connectors(struct drm_device *device,
struct udev_device *drm_device)
{
struct drm_backend *b = device->backend;
drmModeRes *resources;
drmModeConnector *conn;
struct weston_head *base, *base_next;
struct drm_head *head;
struct drm_writeback *writeback, *writeback_next;
uint32_t connector_id;
int i, ret;
resources = drmModeGetResources(device->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++) {
connector_id = resources->connectors[i];
conn = drmModeGetConnector(device->drm.fd, connector_id);
if (!conn)
continue;
head = drm_head_find_by_connector(b, device, connector_id);
writeback = drm_writeback_find_by_connector(device, connector_id);
/* Connector can't be owned by both a head and a writeback, so
* one of the searches must fail. */
assert(head == NULL || writeback == NULL);
if (head) {
ret = drm_head_update_info(head, conn);
if (head->base.device_changed)
drm_head_log_info(head, "updated");
} else if (writeback) {
ret = drm_writeback_update_info(writeback, conn);
} else {
ret = drm_backend_add_connector(device, conn, drm_device);
}
if (ret < 0)
drmModeFreeConnector(conn);
}
/* Destroy head objects of connectors (except writeback connectors) that
* have disappeared. */
wl_list_for_each_safe(base, base_next,
&b->compositor->head_list, compositor_link) {
head = to_drm_head(base);
if (!head)
continue;
connector_id = head->connector.connector_id;
if (head->connector.device != device)
continue;
if (resources_has_connector(resources, connector_id))
continue;
weston_log("DRM: head '%s' (connector %d) disappeared.\n",
head->base.name, connector_id);
drm_head_destroy(base);
}
/* Destroy writeback objects of writeback connectors that have
* disappeared. */
wl_list_for_each_safe(writeback, writeback_next,
&b->drm->writeback_connector_list, link) {
connector_id = writeback->connector.connector_id;
if (resources_has_connector(resources, connector_id))
continue;
weston_log("DRM: writeback connector (connector %d) disappeared.\n",
connector_id);
drm_writeback_destroy(writeback);
}
drmModeFreeResources(resources);
}
static enum wdrm_connector_property
drm_connector_find_property_by_id(struct drm_connector *connector,
uint32_t property_id)
{
int i;
enum wdrm_connector_property prop = WDRM_CONNECTOR__COUNT;
if (!connector || !property_id)
return WDRM_CONNECTOR__COUNT;
for (i = 0; i < WDRM_CONNECTOR__COUNT; i++)
if (connector->props[i].prop_id == property_id) {
prop = (enum wdrm_connector_property) i;
break;
}
return prop;
}
static void
drm_backend_update_conn_props(struct drm_backend *b,
struct drm_device *device,
uint32_t connector_id,
uint32_t property_id)
{
struct drm_head *head;
enum wdrm_connector_property conn_prop;
head = drm_head_find_by_connector(b, device, connector_id);
if (!head) {
weston_log("DRM: failed to find head for connector id: %d.\n",
connector_id);
return;
}
conn_prop = drm_connector_find_property_by_id(&head->connector, property_id);
if (conn_prop >= WDRM_CONNECTOR__COUNT)
return;
if (drm_connector_update_properties(&head->connector) < 0)
return;
if (conn_prop == WDRM_CONNECTOR_CONTENT_PROTECTION) {
weston_head_set_content_protection_status(&head->base,
drm_head_get_current_protection(head));
}
}
static int
udev_event_is_hotplug(struct drm_device *device, struct udev_device *udev_device)
{
const char *sysnum;
const char *val;
sysnum = udev_device_get_sysnum(udev_device);
if (!sysnum || atoi(sysnum) != device->drm.id)
return 0;
val = udev_device_get_property_value(udev_device, "HOTPLUG");
if (!val)
return 0;
return strcmp(val, "1") == 0;
}
static int
udev_event_is_conn_prop_change(struct drm_backend *b,
struct udev_device *udev_device,
uint32_t *connector_id,
uint32_t *property_id)
{
const char *val;
int id;
val = udev_device_get_property_value(udev_device, "CONNECTOR");
if (!val || !safe_strtoint(val, &id))
return 0;
else
*connector_id = id;
val = udev_device_get_property_value(udev_device, "PROPERTY");
if (!val || !safe_strtoint(val, &id))
return 0;
else
*property_id = id;
return 1;
}
static int
udev_drm_event(int fd, uint32_t mask, void *data)
{
struct drm_backend *b = data;
struct udev_device *event;
uint32_t conn_id, prop_id;
struct drm_device *device;
event = udev_monitor_receive_device(b->udev_monitor);
if (udev_event_is_hotplug(b->drm, event)) {
if (udev_event_is_conn_prop_change(b, event, &conn_id, &prop_id))
drm_backend_update_conn_props(b, b->drm, conn_id, prop_id);
else
drm_backend_update_connectors(b->drm, event);
}
wl_list_for_each(device, &b->kms_list, link) {
if (udev_event_is_hotplug(device, event)) {
if (udev_event_is_conn_prop_change(b, event, &conn_id, &prop_id))
drm_backend_update_conn_props(b, device, conn_id, prop_id);
else
drm_backend_update_connectors(device, event);
}
}
udev_device_unref(event);
return 1;
}
static void
drm_shutdown(struct weston_backend *backend)
{
struct drm_backend *b = container_of(backend, struct drm_backend, base);
struct weston_compositor *ec = b->compositor;
struct weston_output *output_base;
struct drm_output *output;
udev_input_destroy(&b->input);
wl_event_source_remove(b->udev_drm_source);
wl_event_source_remove(b->drm_source);
/* We are shutting down. This function destroy the planes with
* destroy_sprites() and then calls weston_compositor_shutdown(), which
* will lead to calls to drm_output_destroy(). We are destroying the
* plane and its state_cur in drm_plane_destroy(), and that removes
* state_cur from the output->state_cur list, but not from the
* state_last list.
*
* This was not an issue because we'd leak the drm_output (and so
* output->last_state) during shutdown with a pending page flip. And if
* we were no shutting down, we'd always wait until flip completion
* before destroying an output (meaning that
* drm_output_update_complete() would be called and output->state_last
* would be freed and set to NULL).
*
* But now we don't leak the drm_output during shutdown with a pending
* flip anymore. So we must destroy output->state_last for every output
* before destroying the planes with destroy_sprites(), otherwise we'd
* leave output->state_last referring to a freed plane, leading to
* issues when trying to free it at a later point.
*/
wl_list_for_each(output_base, &ec->output_list, link) {
output = to_drm_output(output_base);
if (output && (output->page_flip_pending || output->atomic_complete_pending)) {
drm_output_state_free(output->state_last);
output->state_last = NULL;
}
}
destroy_sprites(b->drm);
weston_log_scope_destroy(b->debug);
b->debug = NULL;
}
void
drm_destroy(struct weston_backend *backend)
{
struct drm_backend *b = container_of(backend, struct drm_backend, base);
struct weston_compositor *ec = b->compositor;
struct drm_device *device = b->drm;
struct weston_head *base, *next;
struct drm_crtc *crtc, *crtc_tmp;
struct drm_writeback *writeback, *writeback_tmp;
wl_list_remove(&b->base.link);
wl_list_for_each_safe(crtc, crtc_tmp, &b->drm->crtc_list, link)
drm_crtc_destroy(crtc);
wl_list_for_each_safe(base, next, &ec->head_list, compositor_link) {
if (to_drm_head(base))
drm_head_destroy(base);
}
wl_list_for_each_safe(writeback, writeback_tmp,
&b->drm->writeback_connector_list, link)
drm_writeback_destroy(writeback);
#ifdef BUILD_DRM_GBM
if (b->gbm)
gbm_device_destroy(b->gbm);
#endif
udev_monitor_unref(b->udev_monitor);
udev_unref(b->udev);
weston_launcher_close(ec->launcher, device->drm.fd);
weston_launcher_destroy(ec->launcher);
free(device->drm.filename);
free(device);
free(b);
}
static void
session_notify(struct wl_listener *listener, void *data)
{
struct weston_compositor *compositor = data;
struct drm_backend *b =
container_of(listener, struct drm_backend, session_listener);
struct drm_device *device = b->drm;
struct weston_output *output;
if (compositor->session_active) {
weston_log("activating session\n");
weston_compositor_wake(compositor);
weston_compositor_damage_all(compositor);
device->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, link)
if (to_drm_output(output))
output->repaint_needed = false;
}
}
/**
* Handle KMS GPU being added/removed
*
* If the device being added/removed is the KMS device, we activate/deactivate
* the compositor session.
*
* @param backend The DRM backend instance.
* @param devnum The device being added/removed.
* @param added Whether the device is being added (or removed)
*/
static void
drm_device_changed(struct weston_backend *backend,
dev_t devnum, bool added)
{
struct drm_backend *b = container_of(backend, struct drm_backend, base);
struct weston_compositor *compositor = b->compositor;
struct drm_device *device = b->drm;
if (device->drm.fd < 0 || device->drm.devnum != devnum ||
compositor->session_active == added)
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 drm_device *device,
struct udev_device *udev_device)
{
struct weston_compositor *compositor = b->compositor;
const char *filename = udev_device_get_devnode(udev_device);
const char *sysnum = udev_device_get_sysnum(udev_device);
dev_t devnum = udev_device_get_devnum(udev_device);
drmModeRes *res;
int id = -1, fd;
if (!filename)
return false;
fd = weston_launcher_open(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 (device->drm.fd >= 0)
weston_launcher_close(compositor->launcher, device->drm.fd);
free(device->drm.filename);
device->drm.fd = fd;
device->drm.id = id;
device->drm.filename = strdup(filename);
device->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 drm_device *device = b->drm;
struct udev_enumerate *e;
struct udev_list_entry *entry;
const char *path, *device_seat, *id;
struct udev_device *dev, *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);
dev = udev_device_new_from_syspath(b->udev, path);
if (!dev)
continue;
device_seat = udev_device_get_property_value(dev, "ID_SEAT");
if (!device_seat)
device_seat = default_seat;
if (strcmp(device_seat, seat)) {
udev_device_unref(dev);
continue;
}
pci = udev_device_get_parent_with_subsystem_devtype(dev,
"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(dev);
continue;
}
/* Make sure this device is actually capable of modesetting;
* if this call succeeds, device->drm.{fd,filename} will be set,
* and any old values freed. */
if (!drm_device_is_kms(b, b->drm, dev)) {
udev_device_unref(dev);
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 = dev;
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 = dev;
}
/* If we're returning a device to use, we must have an open FD for
* it. */
assert(!!drm_device == (device->drm.fd >= 0));
udev_enumerate_unref(e);
return drm_device;
}
static struct udev_device *
open_specific_drm_device(struct drm_backend *b, struct drm_device *device,
const char *name)
{
struct udev_device *udev_device;
udev_device = udev_device_new_from_subsystem_sysname(b->udev, "drm", name);
if (!udev_device) {
weston_log("ERROR: could not open DRM device '%s'\n", name);
return NULL;
}
if (!drm_device_is_kms(b, device, udev_device)) {
udev_device_unref(udev_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(device->drm.fd >= 0);
return udev_device;
}
static void
planes_binding(struct weston_keyboard *keyboard, const struct timespec *time,
uint32_t key, void *data)
{
struct drm_backend *b = data;
struct drm_device *device = b->drm;
switch (key) {
case KEY_C:
device->cursors_are_broken ^= true;
break;
case KEY_V:
/* We don't support overlay-plane usage with legacy KMS. */
if (device->atomic_modeset)
device->sprites_are_broken ^= true;
break;
default:
break;
}
}
#ifdef BUILD_VAAPI_RECORDER
static void
recorder_destroy(struct drm_output *output)
{
vaapi_recorder_destroy(output->recorder);
output->recorder = NULL;
weston_output_disable_planes_decr(&output->base);
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_device *device;
int fd, ret;
output = container_of(listener, struct drm_output,
recorder_frame_listener);
device = output->device;
if (!output->recorder)
return;
ret = drmPrimeHandleToFD(device->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)
{
struct drm_device *device = b->drm;
int fd;
drm_magic_t magic;
fd = open(device->drm.filename, O_RDWR | O_CLOEXEC);
if (fd < 0)
return NULL;
drmGetMagic(fd, &magic);
drmAuthMagic(device->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 weston_output *base_output;
struct drm_output *output;
int width, height;
wl_list_for_each(base_output, &b->compositor->output_list, link) {
output = to_drm_output(base_output);
if (output)
break;
}
if (!output->recorder) {
if (!output->format ||
output->format->format != DRM_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;
}
weston_output_disable_planes_incr(&output->base);
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 struct drm_device *
drm_device_create(struct drm_backend *backend, const char *name)
{
struct weston_compositor *compositor = backend->compositor;
struct udev_device *udev_device;
struct drm_device *device;
struct wl_event_loop *loop;
drmModeRes *res;
device = zalloc(sizeof *device);
if (device == NULL)
return NULL;
device->state_invalid = true;
device->drm.fd = -1;
device->backend = backend;
device->gem_handle_refcnt = hash_table_create();
udev_device = open_specific_drm_device(backend, device, name);
if (!udev_device) {
free(device);
return NULL;
}
if (init_kms_caps(device) < 0) {
weston_log("failed to initialize kms\n");
goto err;
}
res = drmModeGetResources(device->drm.fd);
if (!res) {
weston_log("Failed to get drmModeRes\n");
goto err;
}
wl_list_init(&device->crtc_list);
if (drm_backend_create_crtc_list(device, res) == -1) {
weston_log("Failed to create CRTC list for DRM-backend\n");
goto err;
}
loop = wl_display_get_event_loop(compositor->wl_display);
wl_event_loop_add_fd(loop, device->drm.fd,
WL_EVENT_READABLE, on_drm_input, device);
wl_list_init(&device->plane_list);
create_sprites(device);
wl_list_init(&device->writeback_connector_list);
if (drm_backend_discover_connectors(device, udev_device, res) < 0) {
weston_log("Failed to create heads for %s\n", device->drm.filename);
goto err;
}
/* 'compute' faked zpos values in case HW doesn't expose any */
drm_backend_create_faked_zpos(device);
return device;
err:
return NULL;
}
static void
open_additional_devices(struct drm_backend *backend, const char *cards)
{
struct drm_device *device;
char *tokenize = strdup(cards);
char *card = strtok(tokenize, ",");
while (card) {
device = drm_device_create(backend, card);
if (!device) {
weston_log("unable to use card %s\n", card);
goto next;
}
weston_log("adding secondary device %s\n",
device->drm.filename);
wl_list_insert(&backend->kms_list, &device->link);
next:
card = strtok(NULL, ",");
}
free(tokenize);
}
static const struct weston_drm_output_api api = {
drm_output_set_mode,
drm_output_set_gbm_format,
drm_output_set_seat,
drm_output_set_max_bpc,
drm_output_set_content_type,
};
static struct drm_backend *
drm_backend_create(struct weston_compositor *compositor,
struct weston_drm_backend_config *config)
{
struct drm_backend *b;
struct drm_device *device;
struct udev_device *drm_device;
struct wl_event_loop *loop;
const char *seat_id = default_seat;
const char *session_seat;
struct weston_drm_format_array *scanout_formats;
drmModeRes *res;
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;
device = zalloc(sizeof *device);
if (device == NULL)
return NULL;
device->state_invalid = true;
device->drm.fd = -1;
device->backend = b;
b->drm = device;
wl_list_init(&b->kms_list);
b->compositor = compositor;
b->pageflip_timeout = config->pageflip_timeout;
b->use_pixman_shadow = config->use_pixman_shadow;
b->debug = weston_compositor_add_log_scope(compositor, "drm-backend",
"Debug messages from DRM/KMS backend\n",
NULL, NULL, NULL);
wl_list_insert(&compositor->backend_list, &b->base.link);
if (parse_gbm_format(config->gbm_format,
pixel_format_get_info(DRM_FORMAT_XRGB8888),
&b->format) < 0)
goto err_compositor;
/* Check if we run drm-backend using a compatible launcher */
compositor->launcher = weston_launcher_connect(compositor, seat_id, true);
if (compositor->launcher == NULL) {
weston_log("fatal: your system should either provide the "
"logind D-Bus API, or use seatd.\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, device,
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(device) < 0) {
weston_log("failed to initialize kms\n");
goto err_udev_dev;
}
if (config->additional_devices)
open_additional_devices(b, config->additional_devices);
if (config->renderer == WESTON_RENDERER_AUTO) {
#ifdef BUILD_DRM_GBM
config->renderer = WESTON_RENDERER_GL;
#else
config->renderer = WESTON_RENDERER_PIXMAN;
#endif
}
switch (config->renderer) {
case WESTON_RENDERER_PIXMAN:
if (init_pixman(b) < 0) {
weston_log("failed to initialize pixman renderer\n");
goto err_udev_dev;
}
break;
case WESTON_RENDERER_GL:
if (init_egl(b) < 0) {
weston_log("failed to initialize egl\n");
goto err_udev_dev;
}
break;
default:
weston_log("unsupported renderer for DRM backend\n");
goto err_udev_dev;
}
b->base.shutdown = drm_shutdown;
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;
b->base.can_scanout_dmabuf = drm_can_scanout_dmabuf;
weston_setup_vt_switch_bindings(compositor);
res = drmModeGetResources(b->drm->drm.fd);
if (!res) {
weston_log("Failed to get drmModeRes\n");
goto err_udev_dev;
}
wl_list_init(&b->drm->crtc_list);
if (drm_backend_create_crtc_list(b->drm, res) == -1) {
weston_log("Failed to create CRTC list for DRM-backend\n");
goto err_create_crtc_list;
}
wl_list_init(&device->plane_list);
create_sprites(b->drm);
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;
}
wl_list_init(&b->drm->writeback_connector_list);
if (drm_backend_discover_connectors(b->drm, drm_device, res) < 0) {
weston_log("Failed to create heads for %s\n", b->drm->drm.filename);
goto err_udev_input;
}
drmModeFreeResources(res);
/* 'compute' faked zpos values in case HW doesn't expose any */
drm_backend_create_faked_zpos(b->drm);
/* A this point we have some idea of whether or not we have a working
* cursor plane. */
if (!device->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->drm.fd,
WL_EVENT_READABLE, on_drm_input, b->drm);
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);
if (compositor->renderer->import_dmabuf) {
if (linux_dmabuf_setup(compositor) < 0)
weston_log("Error: initializing dmabuf "
"support failed.\n");
if (compositor->default_dmabuf_feedback) {
/* We were able to create the compositor's default
* dma-buf feedback in the renderer, that means that the
* table was already created and populated with
* renderer's format/modifier pairs. So now we must
* compute the scanout formats indices in the table */
scanout_formats = get_scanout_formats(b->drm);
if (!scanout_formats)
goto err_udev_monitor;
ret = weston_dmabuf_feedback_format_table_set_scanout_indices(compositor->dmabuf_feedback_format_table,
scanout_formats);
weston_drm_format_array_fini(scanout_formats);
free(scanout_formats);
if (ret < 0)
goto err_udev_monitor;
}
if (weston_direct_display_setup(compositor) < 0)
weston_log("Error: initializing direct-display "
"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");
}
if (device->atomic_modeset)
if (weston_compositor_enable_content_protection(compositor) < 0)
weston_log("Error: initializing content-protection "
"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 = drm_backend_init_virtual_output_api(compositor);
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:
destroy_sprites(b->drm);
err_create_crtc_list:
drmModeFreeResources(res);
err_udev_dev:
udev_device_unref(drm_device);
err_udev:
udev_unref(b->udev);
err_launcher:
weston_launcher_destroy(compositor->launcher);
err_compositor:
wl_list_remove(&b->base.link);
#ifdef BUILD_DRM_GBM
if (b->gbm)
gbm_device_destroy(b->gbm);
#endif
free(b);
return NULL;
}
static void
config_init_to_defaults(struct weston_drm_backend_config *config)
{
config->renderer = WESTON_RENDERER_AUTO;
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;
}
if (compositor->renderer) {
weston_log("drm backend must be the primary backend\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;
}
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