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weston/libweston/compositor-drm.c
Daniel Stone 906488790b compositor-drm: Make scanout view preparation more stringent 
Don't import buffers which span multiple outputs, short-cut any attempt
to import SHM buffers, and ignore buffers with a global alpha set.

I'm not convinced all of these conditions entirely make sense, but this
at least makes them equally nonsensical.

Differential Revision: https://phabricator.freedesktop.org/D1414

Signed-off-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Derek Foreman <derekf@osg.samsung.com>
2017-02-27 21:39:13 +00:00

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/*
* Copyright © 2008-2011 Kristian Høgsberg
* Copyright © 2011 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "config.h"
#include <errno.h>
#include <stdint.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <linux/input.h>
#include <linux/vt.h>
#include <assert.h>
#include <sys/mman.h>
#include <dlfcn.h>
#include <time.h>
#include <xf86drm.h>
#include <xf86drmMode.h>
#include <drm_fourcc.h>
#include <gbm.h>
#include <libudev.h>
#include "compositor.h"
#include "compositor-drm.h"
#include "shared/helpers.h"
#include "shared/timespec-util.h"
#include "gl-renderer.h"
#include "weston-egl-ext.h"
#include "pixman-renderer.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"
#ifndef DRM_CAP_TIMESTAMP_MONOTONIC
#define DRM_CAP_TIMESTAMP_MONOTONIC 0x6
#endif
#ifndef DRM_CAP_CURSOR_WIDTH
#define DRM_CAP_CURSOR_WIDTH 0x8
#endif
#ifndef DRM_CAP_CURSOR_HEIGHT
#define DRM_CAP_CURSOR_HEIGHT 0x9
#endif
#ifndef GBM_BO_USE_CURSOR
#define GBM_BO_USE_CURSOR GBM_BO_USE_CURSOR_64X64
#endif
struct drm_backend {
struct weston_backend base;
struct weston_compositor *compositor;
struct udev *udev;
struct wl_event_source *drm_source;
struct udev_monitor *udev_monitor;
struct wl_event_source *udev_drm_source;
struct {
int id;
int fd;
char *filename;
} drm;
struct gbm_device *gbm;
struct wl_listener session_listener;
uint32_t gbm_format;
/* we need these parameters in order to not fail drmModeAddFB2()
* due to out of bounds dimensions, and then mistakenly set
* sprites_are_broken:
*/
int min_width, max_width;
int min_height, max_height;
int no_addfb2;
struct wl_list sprite_list;
int sprites_are_broken;
int sprites_hidden;
int cursors_are_broken;
int use_pixman;
struct udev_input input;
int32_t cursor_width;
int32_t cursor_height;
uint32_t connector;
};
struct drm_mode {
struct weston_mode base;
drmModeModeInfo mode_info;
};
struct drm_fb {
uint32_t fb_id, stride, handle, size;
int width, height;
int fd;
int is_client_buffer;
struct weston_buffer_reference buffer_ref;
/* Used by gbm fbs */
struct gbm_bo *bo;
/* Used by dumb fbs */
void *map;
};
struct drm_edid {
char eisa_id[13];
char monitor_name[13];
char pnp_id[5];
char serial_number[13];
};
struct drm_output {
struct weston_output base;
drmModeConnector *connector;
uint32_t crtc_id; /* object ID to pass to DRM functions */
int pipe; /* index of CRTC in resource array / bitmasks */
uint32_t connector_id;
drmModeCrtcPtr original_crtc;
struct drm_edid edid;
drmModePropertyPtr dpms_prop;
uint32_t gbm_format;
enum dpms_enum dpms;
int vblank_pending;
int page_flip_pending;
int destroy_pending;
int disable_pending;
struct gbm_surface *gbm_surface;
struct gbm_bo *gbm_cursor_bo[2];
struct weston_plane cursor_plane;
struct weston_plane fb_plane;
struct weston_view *cursor_view;
int current_cursor;
struct drm_fb *current, *next;
struct backlight *backlight;
struct drm_fb *dumb[2];
pixman_image_t *image[2];
int current_image;
pixman_region32_t previous_damage;
struct vaapi_recorder *recorder;
struct wl_listener recorder_frame_listener;
};
/*
* An output has a primary display plane plus zero or more sprites for
* blending display contents.
*/
struct drm_sprite {
struct wl_list link;
struct weston_plane plane;
struct drm_fb *current, *next;
struct drm_output *output;
struct drm_backend *backend;
uint32_t possible_crtcs;
uint32_t plane_id;
uint32_t count_formats;
int32_t src_x, src_y;
uint32_t src_w, src_h;
uint32_t dest_x, dest_y;
uint32_t dest_w, dest_h;
uint32_t formats[];
};
static struct gl_renderer_interface *gl_renderer;
static const char default_seat[] = "seat0";
static inline struct drm_output *
to_drm_output(struct weston_output *base)
{
return container_of(base, struct drm_output, base);
}
static inline struct drm_backend *
to_drm_backend(struct weston_compositor *base)
{
return container_of(base->backend, struct drm_backend, base);
}
static void
drm_output_set_cursor(struct drm_output *output);
static void
drm_output_update_msc(struct drm_output *output, unsigned int seq);
static int
drm_sprite_crtc_supported(struct drm_output *output, struct drm_sprite *sprite)
{
return !!(sprite->possible_crtcs & (1 << output->pipe));
}
static struct drm_output *
drm_output_find_by_crtc(struct drm_backend *b, uint32_t crtc_id)
{
struct drm_output *output;
wl_list_for_each(output, &b->compositor->output_list, base.link) {
if (output->crtc_id == crtc_id)
return output;
}
wl_list_for_each(output, &b->compositor->pending_output_list,
base.link) {
if (output->crtc_id == crtc_id)
return output;
}
return NULL;
}
static struct drm_output *
drm_output_find_by_connector(struct drm_backend *b, uint32_t connector_id)
{
struct drm_output *output;
wl_list_for_each(output, &b->compositor->output_list, base.link) {
if (output->connector_id == connector_id)
return output;
}
wl_list_for_each(output, &b->compositor->pending_output_list,
base.link) {
if (output->connector_id == connector_id)
return output;
}
return NULL;
}
static void
drm_fb_destroy_callback(struct gbm_bo *bo, void *data)
{
struct drm_fb *fb = data;
if (fb->fb_id)
drmModeRmFB(fb->fd, fb->fb_id);
weston_buffer_reference(&fb->buffer_ref, NULL);
free(data);
}
static struct drm_fb *
drm_fb_create_dumb(struct drm_backend *b, int width, int height,
uint32_t format)
{
struct drm_fb *fb;
int ret;
uint32_t bpp, depth;
struct drm_mode_create_dumb create_arg;
struct drm_mode_destroy_dumb destroy_arg;
struct drm_mode_map_dumb map_arg;
fb = zalloc(sizeof *fb);
if (!fb)
return NULL;
switch (format) {
case GBM_FORMAT_XRGB8888:
bpp = 32;
depth = 24;
break;
case GBM_FORMAT_RGB565:
bpp = depth = 16;
break;
default:
return NULL;
}
memset(&create_arg, 0, sizeof create_arg);
create_arg.bpp = bpp;
create_arg.width = width;
create_arg.height = height;
ret = drmIoctl(b->drm.fd, DRM_IOCTL_MODE_CREATE_DUMB, &create_arg);
if (ret)
goto err_fb;
fb->handle = create_arg.handle;
fb->stride = create_arg.pitch;
fb->size = create_arg.size;
fb->width = width;
fb->height = height;
fb->fd = b->drm.fd;
ret = -1;
if (!b->no_addfb2) {
uint32_t handles[4] = { 0 }, pitches[4] = { 0 }, offsets[4] = { 0 };
handles[0] = fb->handle;
pitches[0] = fb->stride;
offsets[0] = 0;
ret = drmModeAddFB2(b->drm.fd, width, height,
format, handles, pitches, offsets,
&fb->fb_id, 0);
if (ret) {
weston_log("addfb2 failed: %m\n");
b->no_addfb2 = 1;
}
}
if (ret) {
ret = drmModeAddFB(b->drm.fd, width, height, depth, bpp,
fb->stride, fb->handle, &fb->fb_id);
}
if (ret)
goto err_bo;
memset(&map_arg, 0, sizeof map_arg);
map_arg.handle = fb->handle;
ret = drmIoctl(fb->fd, DRM_IOCTL_MODE_MAP_DUMB, &map_arg);
if (ret)
goto err_add_fb;
fb->map = mmap(NULL, fb->size, PROT_WRITE,
MAP_SHARED, b->drm.fd, map_arg.offset);
if (fb->map == MAP_FAILED)
goto err_add_fb;
return fb;
err_add_fb:
drmModeRmFB(b->drm.fd, fb->fb_id);
err_bo:
memset(&destroy_arg, 0, sizeof(destroy_arg));
destroy_arg.handle = create_arg.handle;
drmIoctl(b->drm.fd, DRM_IOCTL_MODE_DESTROY_DUMB, &destroy_arg);
err_fb:
free(fb);
return NULL;
}
static void
drm_fb_destroy_dumb(struct drm_fb *fb)
{
struct drm_mode_destroy_dumb destroy_arg;
if (!fb->map)
return;
if (fb->fb_id)
drmModeRmFB(fb->fd, fb->fb_id);
weston_buffer_reference(&fb->buffer_ref, NULL);
munmap(fb->map, fb->size);
memset(&destroy_arg, 0, sizeof(destroy_arg));
destroy_arg.handle = fb->handle;
drmIoctl(fb->fd, DRM_IOCTL_MODE_DESTROY_DUMB, &destroy_arg);
free(fb);
}
static struct drm_fb *
drm_fb_get_from_bo(struct gbm_bo *bo,
struct drm_backend *backend, uint32_t format)
{
struct drm_fb *fb = gbm_bo_get_user_data(bo);
uint32_t handles[4] = { 0 }, pitches[4] = { 0 }, offsets[4] = { 0 };
int ret;
if (fb)
return fb;
fb = zalloc(sizeof *fb);
if (fb == NULL)
return NULL;
fb->bo = bo;
fb->width = gbm_bo_get_width(bo);
fb->height = gbm_bo_get_height(bo);
fb->stride = gbm_bo_get_stride(bo);
fb->handle = gbm_bo_get_handle(bo).u32;
fb->size = fb->stride * fb->height;
fb->fd = backend->drm.fd;
if (backend->min_width > fb->width ||
fb->width > backend->max_width ||
backend->min_height > fb->height ||
fb->height > backend->max_height) {
weston_log("bo geometry out of bounds\n");
goto err_free;
}
ret = -1;
if (format && !backend->no_addfb2) {
handles[0] = fb->handle;
pitches[0] = fb->stride;
offsets[0] = 0;
ret = drmModeAddFB2(backend->drm.fd, fb->width, fb->height,
format, handles, pitches, offsets,
&fb->fb_id, 0);
if (ret) {
weston_log("addfb2 failed: %m\n");
backend->no_addfb2 = 1;
backend->sprites_are_broken = 1;
}
}
if (ret)
ret = drmModeAddFB(backend->drm.fd, fb->width, fb->height,
24, 32, fb->stride, fb->handle, &fb->fb_id);
if (ret) {
weston_log("failed to create kms fb: %m\n");
goto err_free;
}
gbm_bo_set_user_data(bo, fb, drm_fb_destroy_callback);
return fb;
err_free:
free(fb);
return NULL;
}
static void
drm_fb_set_buffer(struct drm_fb *fb, struct weston_buffer *buffer)
{
assert(fb->buffer_ref.buffer == NULL);
fb->is_client_buffer = 1;
weston_buffer_reference(&fb->buffer_ref, buffer);
}
static void
drm_output_release_fb(struct drm_output *output, struct drm_fb *fb)
{
if (!fb)
return;
if (fb->map &&
(fb != output->dumb[0] && fb != output->dumb[1])) {
drm_fb_destroy_dumb(fb);
} else if (fb->bo) {
if (fb->is_client_buffer)
gbm_bo_destroy(fb->bo);
else
gbm_surface_release_buffer(output->gbm_surface,
fb->bo);
}
}
static int
drm_view_transform_supported(struct weston_view *ev)
{
return !ev->transform.enabled ||
(ev->transform.matrix.type < WESTON_MATRIX_TRANSFORM_ROTATE);
}
static uint32_t
drm_output_check_scanout_format(struct drm_output *output,
struct weston_surface *es, struct gbm_bo *bo)
{
uint32_t format;
pixman_region32_t r;
format = gbm_bo_get_format(bo);
if (format == GBM_FORMAT_ARGB8888) {
/* We can scanout an ARGB buffer if the surface's
* opaque region covers the whole output, but we have
* to use XRGB as the KMS format code. */
pixman_region32_init_rect(&r, 0, 0,
output->base.width,
output->base.height);
pixman_region32_subtract(&r, &r, &es->opaque);
if (!pixman_region32_not_empty(&r))
format = GBM_FORMAT_XRGB8888;
pixman_region32_fini(&r);
}
if (output->gbm_format == format)
return format;
return 0;
}
static struct weston_plane *
drm_output_prepare_scanout_view(struct drm_output *output,
struct weston_view *ev)
{
struct drm_backend *b = to_drm_backend(output->base.compositor);
struct weston_buffer *buffer = ev->surface->buffer_ref.buffer;
struct weston_buffer_viewport *viewport = &ev->surface->buffer_viewport;
struct gbm_bo *bo;
uint32_t format;
/* Don't import buffers which span multiple outputs. */
if (ev->output_mask != (1u << output->base.id))
return NULL;
/* We use GBM to import buffers. */
if (b->gbm == NULL)
return NULL;
if (buffer == NULL)
return NULL;
if (wl_shm_buffer_get(buffer->resource))
return NULL;
/* Make sure our view is exactly compatible with the output. */
if (ev->geometry.x != output->base.x ||
ev->geometry.y != output->base.y)
return NULL;
if (buffer->width != output->base.current_mode->width ||
buffer->height != output->base.current_mode->height)
return NULL;
if (ev->transform.enabled)
return NULL;
if (ev->geometry.scissor_enabled)
return NULL;
if (viewport->buffer.transform != output->base.transform)
return NULL;
if (viewport->buffer.scale != output->base.current_scale)
return NULL;
if (!drm_view_transform_supported(ev))
return NULL;
if (ev->alpha != 1.0f)
return NULL;
bo = gbm_bo_import(b->gbm, GBM_BO_IMPORT_WL_BUFFER,
buffer->resource, GBM_BO_USE_SCANOUT);
/* Unable to use the buffer for scanout */
if (!bo)
return NULL;
format = drm_output_check_scanout_format(output, ev->surface, bo);
if (format == 0) {
gbm_bo_destroy(bo);
return NULL;
}
output->next = drm_fb_get_from_bo(bo, b, format);
if (!output->next) {
gbm_bo_destroy(bo);
return NULL;
}
drm_fb_set_buffer(output->next, buffer);
return &output->fb_plane;
}
static void
drm_output_render_gl(struct drm_output *output, pixman_region32_t *damage)
{
struct drm_backend *b = to_drm_backend(output->base.compositor);
struct gbm_bo *bo;
output->base.compositor->renderer->repaint_output(&output->base,
damage);
bo = gbm_surface_lock_front_buffer(output->gbm_surface);
if (!bo) {
weston_log("failed to lock front buffer: %m\n");
return;
}
output->next = drm_fb_get_from_bo(bo, b, output->gbm_format);
if (!output->next) {
weston_log("failed to get drm_fb for bo\n");
gbm_surface_release_buffer(output->gbm_surface, bo);
return;
}
}
static void
drm_output_render_pixman(struct drm_output *output, pixman_region32_t *damage)
{
struct weston_compositor *ec = output->base.compositor;
pixman_region32_t total_damage, previous_damage;
pixman_region32_init(&total_damage);
pixman_region32_init(&previous_damage);
pixman_region32_copy(&previous_damage, damage);
pixman_region32_union(&total_damage, damage, &output->previous_damage);
pixman_region32_copy(&output->previous_damage, &previous_damage);
output->current_image ^= 1;
output->next = output->dumb[output->current_image];
pixman_renderer_output_set_buffer(&output->base,
output->image[output->current_image]);
ec->renderer->repaint_output(&output->base, &total_damage);
pixman_region32_fini(&total_damage);
pixman_region32_fini(&previous_damage);
}
static void
drm_output_render(struct drm_output *output, pixman_region32_t *damage)
{
struct weston_compositor *c = output->base.compositor;
struct drm_backend *b = to_drm_backend(c);
if (b->use_pixman)
drm_output_render_pixman(output, damage);
else
drm_output_render_gl(output, damage);
pixman_region32_subtract(&c->primary_plane.damage,
&c->primary_plane.damage, damage);
}
static void
drm_output_set_gamma(struct weston_output *output_base,
uint16_t size, uint16_t *r, uint16_t *g, uint16_t *b)
{
int rc;
struct drm_output *output = to_drm_output(output_base);
struct drm_backend *backend =
to_drm_backend(output->base.compositor);
/* check */
if (output_base->gamma_size != size)
return;
if (!output->original_crtc)
return;
rc = drmModeCrtcSetGamma(backend->drm.fd,
output->crtc_id,
size, r, g, b);
if (rc)
weston_log("set gamma failed: %m\n");
}
/* Determine the type of vblank synchronization to use for the output.
*
* The pipe parameter indicates which CRTC is in use. Knowing this, we
* can determine which vblank sequence type to use for it. Traditional
* cards had only two CRTCs, with CRTC 0 using no special flags, and
* CRTC 1 using DRM_VBLANK_SECONDARY. The first bit of the pipe
* parameter indicates this.
*
* Bits 1-5 of the pipe parameter are 5 bit wide pipe number between
* 0-31. If this is non-zero it indicates we're dealing with a
* multi-gpu situation and we need to calculate the vblank sync
* using DRM_BLANK_HIGH_CRTC_MASK.
*/
static unsigned int
drm_waitvblank_pipe(struct drm_output *output)
{
if (output->pipe > 1)
return (output->pipe << DRM_VBLANK_HIGH_CRTC_SHIFT) &
DRM_VBLANK_HIGH_CRTC_MASK;
else if (output->pipe > 0)
return DRM_VBLANK_SECONDARY;
else
return 0;
}
static int
drm_output_repaint(struct weston_output *output_base,
pixman_region32_t *damage)
{
struct drm_output *output = to_drm_output(output_base);
struct drm_backend *backend =
to_drm_backend(output->base.compositor);
struct drm_sprite *s;
struct drm_mode *mode;
int ret = 0;
if (output->disable_pending || output->destroy_pending)
return -1;
if (!output->next)
drm_output_render(output, damage);
if (!output->next)
return -1;
mode = container_of(output->base.current_mode, struct drm_mode, base);
if (!output->current ||
output->current->stride != output->next->stride) {
ret = drmModeSetCrtc(backend->drm.fd, output->crtc_id,
output->next->fb_id, 0, 0,
&output->connector_id, 1,
&mode->mode_info);
if (ret) {
weston_log("set mode failed: %m\n");
goto err_pageflip;
}
output_base->set_dpms(output_base, WESTON_DPMS_ON);
}
if (drmModePageFlip(backend->drm.fd, output->crtc_id,
output->next->fb_id,
DRM_MODE_PAGE_FLIP_EVENT, output) < 0) {
weston_log("queueing pageflip failed: %m\n");
goto err_pageflip;
}
output->page_flip_pending = 1;
drm_output_set_cursor(output);
/*
* Now, update all the sprite surfaces
*/
wl_list_for_each(s, &backend->sprite_list, link) {
uint32_t flags = 0, fb_id = 0;
drmVBlank vbl = {
.request.type = DRM_VBLANK_RELATIVE | DRM_VBLANK_EVENT,
.request.sequence = 1,
};
if ((!s->current && !s->next) ||
!drm_sprite_crtc_supported(output, s))
continue;
if (s->next && !backend->sprites_hidden)
fb_id = s->next->fb_id;
ret = drmModeSetPlane(backend->drm.fd, s->plane_id,
output->crtc_id, fb_id, flags,
s->dest_x, s->dest_y,
s->dest_w, s->dest_h,
s->src_x, s->src_y,
s->src_w, s->src_h);
if (ret)
weston_log("setplane failed: %d: %s\n",
ret, strerror(errno));
vbl.request.type |= drm_waitvblank_pipe(output);
/*
* Queue a vblank signal so we know when the surface
* becomes active on the display or has been replaced.
*/
vbl.request.signal = (unsigned long)s;
ret = drmWaitVBlank(backend->drm.fd, &vbl);
if (ret) {
weston_log("vblank event request failed: %d: %s\n",
ret, strerror(errno));
}
s->output = output;
output->vblank_pending = 1;
}
return 0;
err_pageflip:
output->cursor_view = NULL;
if (output->next) {
drm_output_release_fb(output, output->next);
output->next = NULL;
}
return -1;
}
static void
drm_output_start_repaint_loop(struct weston_output *output_base)
{
struct drm_output *output = to_drm_output(output_base);
struct drm_backend *backend =
to_drm_backend(output_base->compositor);
uint32_t fb_id;
struct timespec ts, tnow;
struct timespec vbl2now;
int64_t refresh_nsec;
int ret;
drmVBlank vbl = {
.request.type = DRM_VBLANK_RELATIVE,
.request.sequence = 0,
.request.signal = 0,
};
if (output->disable_pending || output->destroy_pending)
return;
if (!output->current) {
/* We can't page flip if there's no mode set */
goto finish_frame;
}
/* Try to get current msc and timestamp via instant query */
vbl.request.type |= drm_waitvblank_pipe(output);
ret = drmWaitVBlank(backend->drm.fd, &vbl);
/* Error ret or zero timestamp means failure to get valid timestamp */
if ((ret == 0) && (vbl.reply.tval_sec > 0 || vbl.reply.tval_usec > 0)) {
ts.tv_sec = vbl.reply.tval_sec;
ts.tv_nsec = vbl.reply.tval_usec * 1000;
/* Valid timestamp for most recent vblank - not stale?
* Stale ts could happen on Linux 3.17+, so make sure it
* is not older than 1 refresh duration since now.
*/
weston_compositor_read_presentation_clock(backend->compositor,
&tnow);
timespec_sub(&vbl2now, &tnow, &ts);
refresh_nsec =
millihz_to_nsec(output->base.current_mode->refresh);
if (timespec_to_nsec(&vbl2now) < refresh_nsec) {
drm_output_update_msc(output, vbl.reply.sequence);
weston_output_finish_frame(output_base, &ts,
WP_PRESENTATION_FEEDBACK_INVALID);
return;
}
}
/* Immediate query didn't provide valid timestamp.
* Use pageflip fallback.
*/
fb_id = output->current->fb_id;
if (drmModePageFlip(backend->drm.fd, output->crtc_id, fb_id,
DRM_MODE_PAGE_FLIP_EVENT, output) < 0) {
weston_log("queueing pageflip failed: %m\n");
goto finish_frame;
}
return;
finish_frame:
/* if we cannot page-flip, immediately finish frame */
weston_compositor_read_presentation_clock(output_base->compositor, &ts);
weston_output_finish_frame(output_base, &ts,
WP_PRESENTATION_FEEDBACK_INVALID);
}
static void
drm_output_update_msc(struct drm_output *output, unsigned int seq)
{
uint64_t msc_hi = output->base.msc >> 32;
if (seq < (output->base.msc & 0xffffffff))
msc_hi++;
output->base.msc = (msc_hi << 32) + seq;
}
static void
vblank_handler(int fd, unsigned int frame, unsigned int sec, unsigned int usec,
void *data)
{
struct drm_sprite *s = (struct drm_sprite *)data;
struct drm_output *output = s->output;
struct timespec ts;
uint32_t flags = WP_PRESENTATION_FEEDBACK_KIND_HW_COMPLETION |
WP_PRESENTATION_FEEDBACK_KIND_HW_CLOCK;
drm_output_update_msc(output, frame);
output->vblank_pending = 0;
drm_output_release_fb(output, s->current);
s->current = s->next;
s->next = NULL;
if (!output->page_flip_pending) {
ts.tv_sec = sec;
ts.tv_nsec = usec * 1000;
weston_output_finish_frame(&output->base, &ts, flags);
}
}
static void
drm_output_destroy(struct weston_output *base);
static void
page_flip_handler(int fd, unsigned int frame,
unsigned int sec, unsigned int usec, void *data)
{
struct drm_output *output = data;
struct timespec ts;
uint32_t flags = WP_PRESENTATION_FEEDBACK_KIND_VSYNC |
WP_PRESENTATION_FEEDBACK_KIND_HW_COMPLETION |
WP_PRESENTATION_FEEDBACK_KIND_HW_CLOCK;
drm_output_update_msc(output, frame);
/* We don't set page_flip_pending on start_repaint_loop, in that case
* we just want to page flip to the current buffer to get an accurate
* timestamp */
if (output->page_flip_pending) {
drm_output_release_fb(output, output->current);
output->current = output->next;
output->next = NULL;
}
output->page_flip_pending = 0;
if (output->destroy_pending)
drm_output_destroy(&output->base);
else if (output->disable_pending)
weston_output_disable(&output->base);
else if (!output->vblank_pending) {
ts.tv_sec = sec;
ts.tv_nsec = usec * 1000;
weston_output_finish_frame(&output->base, &ts, flags);
/* We can't call this from frame_notify, because the output's
* repaint needed flag is cleared just after that */
if (output->recorder)
weston_output_schedule_repaint(&output->base);
}
}
static uint32_t
drm_output_check_sprite_format(struct drm_sprite *s,
struct weston_view *ev, struct gbm_bo *bo)
{
uint32_t i, format;
format = gbm_bo_get_format(bo);
if (format == GBM_FORMAT_ARGB8888) {
pixman_region32_t r;
pixman_region32_init_rect(&r, 0, 0,
ev->surface->width,
ev->surface->height);
pixman_region32_subtract(&r, &r, &ev->surface->opaque);
if (!pixman_region32_not_empty(&r))
format = GBM_FORMAT_XRGB8888;
pixman_region32_fini(&r);
}
for (i = 0; i < s->count_formats; i++)
if (s->formats[i] == format)
return format;
return 0;
}
static struct weston_plane *
drm_output_prepare_overlay_view(struct drm_output *output,
struct weston_view *ev)
{
struct weston_compositor *ec = output->base.compositor;
struct drm_backend *b = to_drm_backend(ec);
struct weston_buffer_viewport *viewport = &ev->surface->buffer_viewport;
struct wl_resource *buffer_resource;
struct drm_sprite *s;
struct linux_dmabuf_buffer *dmabuf;
int found = 0;
struct gbm_bo *bo;
pixman_region32_t dest_rect, src_rect;
pixman_box32_t *box, tbox;
uint32_t format;
wl_fixed_t sx1, sy1, sx2, sy2;
if (b->sprites_are_broken)
return NULL;
/* Don't import buffers which span multiple outputs. */
if (ev->output_mask != (1u << output->base.id))
return NULL;
/* We can only import GBM buffers. */
if (b->gbm == NULL)
return NULL;
if (ev->surface->buffer_ref.buffer == NULL)
return NULL;
buffer_resource = ev->surface->buffer_ref.buffer->resource;
if (wl_shm_buffer_get(buffer_resource))
return NULL;
if (viewport->buffer.transform != output->base.transform)
return NULL;
if (viewport->buffer.scale != output->base.current_scale)
return NULL;
if (!drm_view_transform_supported(ev))
return NULL;
if (ev->alpha != 1.0f)
return NULL;
wl_list_for_each(s, &b->sprite_list, link) {
if (!drm_sprite_crtc_supported(output, s))
continue;
if (!s->next) {
found = 1;
break;
}
}
/* No sprites available */
if (!found)
return NULL;
if ((dmabuf = linux_dmabuf_buffer_get(buffer_resource))) {
#ifdef HAVE_GBM_FD_IMPORT
/* XXX: TODO:
*
* Use AddFB2 directly, do not go via GBM.
* Add support for multiplanar formats.
* Both require refactoring in the DRM-backend to
* support a mix of gbm_bos and drmfbs.
*/
struct gbm_import_fd_data gbm_dmabuf = {
.fd = dmabuf->attributes.fd[0],
.width = dmabuf->attributes.width,
.height = dmabuf->attributes.height,
.stride = dmabuf->attributes.stride[0],
.format = dmabuf->attributes.format
};
/* XXX: TODO:
*
* Currently the buffer is rejected if any dmabuf attribute
* flag is set. This keeps us from passing an inverted /
* interlaced / bottom-first buffer (or any other type that may
* be added in the future) through to an overlay. Ultimately,
* these types of buffers should be handled through buffer
* transforms and not as spot-checks requiring specific
* knowledge. */
if (dmabuf->attributes.n_planes != 1 ||
dmabuf->attributes.offset[0] != 0 ||
dmabuf->attributes.flags)
return NULL;
bo = gbm_bo_import(b->gbm, GBM_BO_IMPORT_FD, &gbm_dmabuf,
GBM_BO_USE_SCANOUT);
#else
return NULL;
#endif
} else {
bo = gbm_bo_import(b->gbm, GBM_BO_IMPORT_WL_BUFFER,
buffer_resource, GBM_BO_USE_SCANOUT);
}
if (!bo)
return NULL;
format = drm_output_check_sprite_format(s, ev, bo);
if (format == 0) {
gbm_bo_destroy(bo);
return NULL;
}
s->next = drm_fb_get_from_bo(bo, b, format);
if (!s->next) {
gbm_bo_destroy(bo);
return NULL;
}
drm_fb_set_buffer(s->next, ev->surface->buffer_ref.buffer);
box = pixman_region32_extents(&ev->transform.boundingbox);
s->plane.x = box->x1;
s->plane.y = box->y1;
/*
* Calculate the source & dest rects properly based on actual
* position (note the caller has called weston_view_update_transform()
* for us already).
*/
pixman_region32_init(&dest_rect);
pixman_region32_intersect(&dest_rect, &ev->transform.boundingbox,
&output->base.region);
pixman_region32_translate(&dest_rect, -output->base.x, -output->base.y);
box = pixman_region32_extents(&dest_rect);
tbox = weston_transformed_rect(output->base.width,
output->base.height,
output->base.transform,
output->base.current_scale,
*box);
s->dest_x = tbox.x1;
s->dest_y = tbox.y1;
s->dest_w = tbox.x2 - tbox.x1;
s->dest_h = tbox.y2 - tbox.y1;
pixman_region32_fini(&dest_rect);
pixman_region32_init(&src_rect);
pixman_region32_intersect(&src_rect, &ev->transform.boundingbox,
&output->base.region);
box = pixman_region32_extents(&src_rect);
weston_view_from_global_fixed(ev,
wl_fixed_from_int(box->x1),
wl_fixed_from_int(box->y1),
&sx1, &sy1);
weston_view_from_global_fixed(ev,
wl_fixed_from_int(box->x2),
wl_fixed_from_int(box->y2),
&sx2, &sy2);
if (sx1 < 0)
sx1 = 0;
if (sy1 < 0)
sy1 = 0;
if (sx2 > wl_fixed_from_int(ev->surface->width))
sx2 = wl_fixed_from_int(ev->surface->width);
if (sy2 > wl_fixed_from_int(ev->surface->height))
sy2 = wl_fixed_from_int(ev->surface->height);
tbox.x1 = sx1;
tbox.y1 = sy1;
tbox.x2 = sx2;
tbox.y2 = sy2;
tbox = weston_transformed_rect(wl_fixed_from_int(ev->surface->width),
wl_fixed_from_int(ev->surface->height),
viewport->buffer.transform,
viewport->buffer.scale,
tbox);
s->src_x = tbox.x1 << 8;
s->src_y = tbox.y1 << 8;
s->src_w = (tbox.x2 - tbox.x1) << 8;
s->src_h = (tbox.y2 - tbox.y1) << 8;
pixman_region32_fini(&src_rect);
return &s->plane;
}
static struct weston_plane *
drm_output_prepare_cursor_view(struct drm_output *output,
struct weston_view *ev)
{
struct drm_backend *b = to_drm_backend(output->base.compositor);
struct weston_buffer_viewport *viewport = &ev->surface->buffer_viewport;
struct wl_shm_buffer *shmbuf;
if (b->cursors_are_broken)
return NULL;
if (output->cursor_view)
return NULL;
/* Don't import buffers which span multiple outputs. */
if (ev->output_mask != (1u << output->base.id))
return NULL;
/* We use GBM to import SHM buffers. */
if (b->gbm == NULL)
return NULL;
if (ev->surface->buffer_ref.buffer == NULL)
return NULL;
shmbuf = wl_shm_buffer_get(ev->surface->buffer_ref.buffer->resource);
if (!shmbuf)
return NULL;
if (wl_shm_buffer_get_format(shmbuf) != WL_SHM_FORMAT_ARGB8888)
return NULL;
if (output->base.transform != WL_OUTPUT_TRANSFORM_NORMAL)
return NULL;
if (ev->transform.enabled &&
(ev->transform.matrix.type > WESTON_MATRIX_TRANSFORM_TRANSLATE))
return NULL;
if (viewport->buffer.scale != output->base.current_scale)
return NULL;
if (ev->geometry.scissor_enabled)
return NULL;
if (ev->surface->width > b->cursor_width ||
ev->surface->height > b->cursor_height)
return NULL;
output->cursor_view = ev;
return &output->cursor_plane;
}
/**
* Update the image for the current cursor surface
*
* @param b DRM backend structure
* @param bo GBM buffer object to write into
* @param ev View to use for cursor image
*/
static void
cursor_bo_update(struct drm_backend *b, struct gbm_bo *bo,
struct weston_view *ev)
{
struct weston_buffer *buffer = ev->surface->buffer_ref.buffer;
uint32_t buf[b->cursor_width * b->cursor_height];
int32_t stride;
uint8_t *s;
int i;
assert(buffer && buffer->shm_buffer);
assert(buffer->shm_buffer == wl_shm_buffer_get(buffer->resource));
assert(ev->surface->width <= b->cursor_width);
assert(ev->surface->height <= b->cursor_height);
memset(buf, 0, sizeof buf);
stride = wl_shm_buffer_get_stride(buffer->shm_buffer);
s = wl_shm_buffer_get_data(buffer->shm_buffer);
wl_shm_buffer_begin_access(buffer->shm_buffer);
for (i = 0; i < ev->surface->height; i++)
memcpy(buf + i * b->cursor_width,
s + i * stride,
ev->surface->width * 4);
wl_shm_buffer_end_access(buffer->shm_buffer);
if (gbm_bo_write(bo, buf, sizeof buf) < 0)
weston_log("failed update cursor: %m\n");
}
static void
drm_output_set_cursor(struct drm_output *output)
{
struct weston_view *ev = output->cursor_view;
struct weston_buffer *buffer;
struct drm_backend *b = to_drm_backend(output->base.compositor);
EGLint handle;
struct gbm_bo *bo;
float x, y;
output->cursor_view = NULL;
if (ev == NULL) {
drmModeSetCursor(b->drm.fd, output->crtc_id, 0, 0, 0);
output->cursor_plane.x = INT32_MIN;
output->cursor_plane.y = INT32_MIN;
return;
}
buffer = ev->surface->buffer_ref.buffer;
if (buffer &&
pixman_region32_not_empty(&output->cursor_plane.damage)) {
pixman_region32_fini(&output->cursor_plane.damage);
pixman_region32_init(&output->cursor_plane.damage);
output->current_cursor ^= 1;
bo = output->gbm_cursor_bo[output->current_cursor];
cursor_bo_update(b, bo, ev);
handle = gbm_bo_get_handle(bo).s32;
if (drmModeSetCursor(b->drm.fd, output->crtc_id, handle,
b->cursor_width, b->cursor_height)) {
weston_log("failed to set cursor: %m\n");
b->cursors_are_broken = 1;
}
}
weston_view_to_global_float(ev, 0, 0, &x, &y);
/* From global to output space, output transform is guaranteed to be
* NORMAL by drm_output_prepare_cursor_view().
*/
x = (x - output->base.x) * output->base.current_scale;
y = (y - output->base.y) * output->base.current_scale;
if (output->cursor_plane.x != x || output->cursor_plane.y != y) {
if (drmModeMoveCursor(b->drm.fd, output->crtc_id, x, y)) {
weston_log("failed to move cursor: %m\n");
b->cursors_are_broken = 1;
}
output->cursor_plane.x = x;
output->cursor_plane.y = y;
}
}
static void
drm_assign_planes(struct weston_output *output_base)
{
struct drm_backend *b = to_drm_backend(output_base->compositor);
struct drm_output *output = to_drm_output(output_base);
struct weston_view *ev, *next;
pixman_region32_t overlap, surface_overlap;
struct weston_plane *primary, *next_plane;
/*
* Find a surface for each sprite in the output using some heuristics:
* 1) size
* 2) frequency of update
* 3) opacity (though some hw might support alpha blending)
* 4) clipping (this can be fixed with color keys)
*
* The idea is to save on blitting since this should save power.
* If we can get a large video surface on the sprite for example,
* the main display surface may not need to update at all, and
* the client buffer can be used directly for the sprite surface
* as we do for flipping full screen surfaces.
*/
pixman_region32_init(&overlap);
primary = &output_base->compositor->primary_plane;
wl_list_for_each_safe(ev, next, &output_base->compositor->view_list, link) {
struct weston_surface *es = ev->surface;
/* Test whether this buffer can ever go into a plane:
* non-shm, or small enough to be a cursor.
*
* Also, keep a reference when using the pixman renderer.
* That makes it possible to do a seamless switch to the GL
* renderer and since the pixman renderer keeps a reference
* to the buffer anyway, there is no side effects.
*/
if (b->use_pixman ||
(es->buffer_ref.buffer &&
(!wl_shm_buffer_get(es->buffer_ref.buffer->resource) ||
(ev->surface->width <= b->cursor_width &&
ev->surface->height <= b->cursor_height))))
es->keep_buffer = true;
else
es->keep_buffer = false;
pixman_region32_init(&surface_overlap);
pixman_region32_intersect(&surface_overlap, &overlap,
&ev->transform.boundingbox);
next_plane = NULL;
if (pixman_region32_not_empty(&surface_overlap))
next_plane = primary;
if (next_plane == NULL)
next_plane = drm_output_prepare_cursor_view(output, ev);
if (next_plane == NULL)
next_plane = drm_output_prepare_scanout_view(output, ev);
if (next_plane == NULL)
next_plane = drm_output_prepare_overlay_view(output, ev);
if (next_plane == NULL)
next_plane = primary;
weston_view_move_to_plane(ev, next_plane);
if (next_plane == primary)
pixman_region32_union(&overlap, &overlap,
&ev->transform.boundingbox);
if (next_plane == primary ||
next_plane == &output->cursor_plane) {
/* cursor plane involves a copy */
ev->psf_flags = 0;
} else {
/* All other planes are a direct scanout of a
* single client buffer.
*/
ev->psf_flags = WP_PRESENTATION_FEEDBACK_KIND_ZERO_COPY;
}
pixman_region32_fini(&surface_overlap);
}
pixman_region32_fini(&overlap);
}
/**
* Find the closest-matching mode for a given target
*
* Given a target mode, find the most suitable mode amongst the output's
* current mode list to use, preferring the current mode if possible, to
* avoid an expensive mode switch.
*
* @param output DRM output
* @param target_mode Mode to attempt to match
* @returns Pointer to a mode from the output's mode list
*/
static struct drm_mode *
choose_mode (struct drm_output *output, struct weston_mode *target_mode)
{
struct drm_mode *tmp_mode = NULL, *mode;
if (output->base.current_mode->width == target_mode->width &&
output->base.current_mode->height == target_mode->height &&
(output->base.current_mode->refresh == target_mode->refresh ||
target_mode->refresh == 0))
return (struct drm_mode *)output->base.current_mode;
wl_list_for_each(mode, &output->base.mode_list, base.link) {
if (mode->mode_info.hdisplay == target_mode->width &&
mode->mode_info.vdisplay == target_mode->height) {
if (mode->base.refresh == target_mode->refresh ||
target_mode->refresh == 0) {
return mode;
} else if (!tmp_mode)
tmp_mode = mode;
}
}
return tmp_mode;
}
static int
drm_output_init_egl(struct drm_output *output, struct drm_backend *b);
static void
drm_output_fini_egl(struct drm_output *output);
static int
drm_output_init_pixman(struct drm_output *output, struct drm_backend *b);
static void
drm_output_fini_pixman(struct drm_output *output);
static int
drm_output_switch_mode(struct weston_output *output_base, struct weston_mode *mode)
{
struct drm_output *output;
struct drm_mode *drm_mode;
struct drm_backend *b;
if (output_base == NULL) {
weston_log("output is NULL.\n");
return -1;
}
if (mode == NULL) {
weston_log("mode is NULL.\n");
return -1;
}
b = to_drm_backend(output_base->compositor);
output = to_drm_output(output_base);
drm_mode = choose_mode (output, mode);
if (!drm_mode) {
weston_log("%s, invalid resolution:%dx%d\n", __func__, 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;
/* reset rendering stuff. */
drm_output_release_fb(output, output->current);
drm_output_release_fb(output, output->next);
output->current = output->next = NULL;
if (b->use_pixman) {
drm_output_fini_pixman(output);
if (drm_output_init_pixman(output, b) < 0) {
weston_log("failed to init output pixman state with "
"new mode\n");
return -1;
}
} else {
drm_output_fini_egl(output);
if (drm_output_init_egl(output, b) < 0) {
weston_log("failed to init output egl state with "
"new mode");
return -1;
}
}
return 0;
}
static int
on_drm_input(int fd, uint32_t mask, void *data)
{
drmEventContext evctx;
memset(&evctx, 0, sizeof evctx);
evctx.version = DRM_EVENT_CONTEXT_VERSION;
evctx.page_flip_handler = page_flip_handler;
evctx.vblank_handler = vblank_handler;
drmHandleEvent(fd, &evctx);
return 1;
}
static int
init_kms_caps(struct drm_backend *b)
{
uint64_t cap;
int ret;
clockid_t clk_id;
weston_log("using %s\n", b->drm.filename);
ret = drmGetCap(b->drm.fd, DRM_CAP_TIMESTAMP_MONOTONIC, &cap);
if (ret == 0 && cap == 1)
clk_id = CLOCK_MONOTONIC;
else
clk_id = CLOCK_REALTIME;
if (weston_compositor_set_presentation_clock(b->compositor, clk_id) < 0) {
weston_log("Error: failed to set presentation clock %d.\n",
clk_id);
return -1;
}
ret = drmGetCap(b->drm.fd, DRM_CAP_CURSOR_WIDTH, &cap);
if (ret == 0)
b->cursor_width = cap;
else
b->cursor_width = 64;
ret = drmGetCap(b->drm.fd, DRM_CAP_CURSOR_HEIGHT, &cap);
if (ret == 0)
b->cursor_height = cap;
else
b->cursor_height = 64;
return 0;
}
static struct gbm_device *
create_gbm_device(int fd)
{
struct gbm_device *gbm;
gl_renderer = weston_load_module("gl-renderer.so",
"gl_renderer_interface");
if (!gl_renderer)
return NULL;
/* GBM will load a dri driver, but even though they need symbols from
* libglapi, in some version of Mesa they are not linked to it. Since
* only the gl-renderer module links to it, the call above won't make
* these symbols globally available, and loading the DRI driver fails.
* Workaround this by dlopen()'ing libglapi with RTLD_GLOBAL. */
dlopen("libglapi.so.0", RTLD_LAZY | RTLD_GLOBAL);
gbm = gbm_create_device(fd);
return gbm;
}
/* When initializing EGL, if the preferred buffer format isn't available
* we may be able to substitute an ARGB format for an XRGB one.
*
* This returns 0 if substitution isn't possible, but 0 might be a
* legitimate format for other EGL platforms, so the caller is
* responsible for checking for 0 before calling gl_renderer->create().
*
* This works around https://bugs.freedesktop.org/show_bug.cgi?id=89689
* but it's entirely possible we'll see this again on other implementations.
*/
static int
fallback_format_for(uint32_t format)
{
switch (format) {
case GBM_FORMAT_XRGB8888:
return GBM_FORMAT_ARGB8888;
case GBM_FORMAT_XRGB2101010:
return GBM_FORMAT_ARGB2101010;
default:
return 0;
}
}
static int
drm_backend_create_gl_renderer(struct drm_backend *b)
{
EGLint format[3] = {
b->gbm_format,
fallback_format_for(b->gbm_format),
0,
};
int n_formats = 2;
if (format[1])
n_formats = 3;
if (gl_renderer->display_create(b->compositor,
EGL_PLATFORM_GBM_KHR,
(void *)b->gbm,
NULL,
gl_renderer->opaque_attribs,
format,
n_formats) < 0) {
return -1;
}
return 0;
}
static int
init_egl(struct drm_backend *b)
{
b->gbm = create_gbm_device(b->drm.fd);
if (!b->gbm)
return -1;
if (drm_backend_create_gl_renderer(b) < 0) {
gbm_device_destroy(b->gbm);
return -1;
}
return 0;
}
static int
init_pixman(struct drm_backend *b)
{
return pixman_renderer_init(b->compositor);
}
/**
* Add a mode to output's mode list
*
* Copy the supplied DRM mode into a Weston mode structure, and add it to the
* output's mode list.
*
* @param output DRM output to add mode to
* @param info DRM mode structure to add
* @returns Newly-allocated Weston/DRM mode structure
*/
static struct drm_mode *
drm_output_add_mode(struct drm_output *output, const drmModeModeInfo *info)
{
struct drm_mode *mode;
uint64_t refresh;
mode = malloc(sizeof *mode);
if (mode == NULL)
return NULL;
mode->base.flags = 0;
mode->base.width = info->hdisplay;
mode->base.height = info->vdisplay;
/* Calculate higher precision (mHz) refresh rate */
refresh = (info->clock * 1000000LL / info->htotal +
info->vtotal / 2) / info->vtotal;
if (info->flags & DRM_MODE_FLAG_INTERLACE)
refresh *= 2;
if (info->flags & DRM_MODE_FLAG_DBLSCAN)
refresh /= 2;
if (info->vscan > 1)
refresh /= info->vscan;
mode->base.refresh = refresh;
mode->mode_info = *info;
if (info->type & DRM_MODE_TYPE_PREFERRED)
mode->base.flags |= WL_OUTPUT_MODE_PREFERRED;
wl_list_insert(output->base.mode_list.prev, &mode->base.link);
return mode;
}
static int
drm_subpixel_to_wayland(int drm_value)
{
switch (drm_value) {
default:
case DRM_MODE_SUBPIXEL_UNKNOWN:
return WL_OUTPUT_SUBPIXEL_UNKNOWN;
case DRM_MODE_SUBPIXEL_NONE:
return WL_OUTPUT_SUBPIXEL_NONE;
case DRM_MODE_SUBPIXEL_HORIZONTAL_RGB:
return WL_OUTPUT_SUBPIXEL_HORIZONTAL_RGB;
case DRM_MODE_SUBPIXEL_HORIZONTAL_BGR:
return WL_OUTPUT_SUBPIXEL_HORIZONTAL_BGR;
case DRM_MODE_SUBPIXEL_VERTICAL_RGB:
return WL_OUTPUT_SUBPIXEL_VERTICAL_RGB;
case DRM_MODE_SUBPIXEL_VERTICAL_BGR:
return WL_OUTPUT_SUBPIXEL_VERTICAL_BGR;
}
}
/* returns a value between 0-255 range, where higher is brighter */
static uint32_t
drm_get_backlight(struct drm_output *output)
{
long brightness, max_brightness, norm;
brightness = backlight_get_brightness(output->backlight);
max_brightness = backlight_get_max_brightness(output->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);
long max_brightness, new_brightness;
if (!output->backlight)
return;
if (value > 255)
return;
max_brightness = backlight_get_max_brightness(output->backlight);
/* get denormalized value */
new_brightness = (value * max_brightness) / 255;
backlight_set_brightness(output->backlight, new_brightness);
}
static drmModePropertyPtr
drm_get_prop(int fd, drmModeConnectorPtr connector, const char *name)
{
drmModePropertyPtr props;
int i;
for (i = 0; i < connector->count_props; i++) {
props = drmModeGetProperty(fd, connector->props[i]);
if (!props)
continue;
if (!strcmp(props->name, name))
return props;
drmModeFreeProperty(props);
}
return NULL;
}
static void
drm_set_dpms(struct weston_output *output_base, enum dpms_enum level)
{
struct drm_output *output = to_drm_output(output_base);
struct weston_compositor *ec = output_base->compositor;
struct drm_backend *b = to_drm_backend(ec);
int ret;
if (!output->dpms_prop)
return;
ret = drmModeConnectorSetProperty(b->drm.fd, output->connector_id,
output->dpms_prop->prop_id, level);
if (ret) {
weston_log("DRM: DPMS: failed property set for %s\n",
output->base.name);
return;
}
output->dpms = level;
}
static const char * const connector_type_names[] = {
[DRM_MODE_CONNECTOR_Unknown] = "Unknown",
[DRM_MODE_CONNECTOR_VGA] = "VGA",
[DRM_MODE_CONNECTOR_DVII] = "DVI-I",
[DRM_MODE_CONNECTOR_DVID] = "DVI-D",
[DRM_MODE_CONNECTOR_DVIA] = "DVI-A",
[DRM_MODE_CONNECTOR_Composite] = "Composite",
[DRM_MODE_CONNECTOR_SVIDEO] = "SVIDEO",
[DRM_MODE_CONNECTOR_LVDS] = "LVDS",
[DRM_MODE_CONNECTOR_Component] = "Component",
[DRM_MODE_CONNECTOR_9PinDIN] = "DIN",
[DRM_MODE_CONNECTOR_DisplayPort] = "DP",
[DRM_MODE_CONNECTOR_HDMIA] = "HDMI-A",
[DRM_MODE_CONNECTOR_HDMIB] = "HDMI-B",
[DRM_MODE_CONNECTOR_TV] = "TV",
[DRM_MODE_CONNECTOR_eDP] = "eDP",
#ifdef DRM_MODE_CONNECTOR_DSI
[DRM_MODE_CONNECTOR_VIRTUAL] = "Virtual",
[DRM_MODE_CONNECTOR_DSI] = "DSI",
#endif
};
static char *
make_connector_name(const drmModeConnector *con)
{
char name[32];
const char *type_name = NULL;
if (con->connector_type < ARRAY_LENGTH(connector_type_names))
type_name = connector_type_names[con->connector_type];
if (!type_name)
type_name = "UNNAMED";
snprintf(name, sizeof name, "%s-%d", type_name, con->connector_type_id);
return strdup(name);
}
static int
find_crtc_for_connector(struct drm_backend *b,
drmModeRes *resources, drmModeConnector *connector)
{
drmModeEncoder *encoder;
int i, j;
int ret = -1;
for (j = 0; j < connector->count_encoders; j++) {
uint32_t possible_crtcs, encoder_id, crtc_id;
encoder = drmModeGetEncoder(b->drm.fd, connector->encoders[j]);
if (encoder == NULL) {
weston_log("Failed to get encoder.\n");
continue;
}
encoder_id = encoder->encoder_id;
possible_crtcs = encoder->possible_crtcs;
crtc_id = encoder->crtc_id;
drmModeFreeEncoder(encoder);
for (i = 0; i < resources->count_crtcs; i++) {
if (!(possible_crtcs & (1 << i)))
continue;
if (drm_output_find_by_crtc(b, resources->crtcs[i]))
continue;
/* Try to preserve the existing
* CRTC -> encoder -> connector routing; it makes
* initialisation faster, and also since we have a
* very dumb picking algorithm, may preserve a better
* choice. */
if (!connector->encoder_id ||
(encoder_id == connector->encoder_id &&
crtc_id == resources->crtcs[i]))
return i;
ret = i;
}
}
return ret;
}
/* Init output state that depends on gl or gbm */
static int
drm_output_init_egl(struct drm_output *output, struct drm_backend *b)
{
EGLint format[2] = {
output->gbm_format,
fallback_format_for(output->gbm_format),
};
int i, flags, n_formats = 1;
output->gbm_surface = gbm_surface_create(b->gbm,
output->base.current_mode->width,
output->base.current_mode->height,
format[0],
GBM_BO_USE_SCANOUT |
GBM_BO_USE_RENDERING);
if (!output->gbm_surface) {
weston_log("failed to create gbm surface\n");
return -1;
}
if (format[1])
n_formats = 2;
if (gl_renderer->output_window_create(&output->base,
(EGLNativeWindowType)output->gbm_surface,
output->gbm_surface,
gl_renderer->opaque_attribs,
format,
n_formats) < 0) {
weston_log("failed to create gl renderer output state\n");
gbm_surface_destroy(output->gbm_surface);
return -1;
}
flags = GBM_BO_USE_CURSOR | GBM_BO_USE_WRITE;
for (i = 0; i < 2; i++) {
if (output->gbm_cursor_bo[i])
continue;
output->gbm_cursor_bo[i] =
gbm_bo_create(b->gbm, b->cursor_width, b->cursor_height,
GBM_FORMAT_ARGB8888, flags);
}
if (output->gbm_cursor_bo[0] == NULL || output->gbm_cursor_bo[1] == NULL) {
weston_log("cursor buffers unavailable, using gl cursors\n");
b->cursors_are_broken = 1;
}
return 0;
}
static void
drm_output_fini_egl(struct drm_output *output)
{
gl_renderer->output_destroy(&output->base);
gbm_surface_destroy(output->gbm_surface);
}
static int
drm_output_init_pixman(struct drm_output *output, struct drm_backend *b)
{
int w = output->base.current_mode->width;
int h = output->base.current_mode->height;
uint32_t format = output->gbm_format;
uint32_t pixman_format;
unsigned int i;
switch (format) {
case GBM_FORMAT_XRGB8888:
pixman_format = PIXMAN_x8r8g8b8;
break;
case GBM_FORMAT_RGB565:
pixman_format = PIXMAN_r5g6b5;
break;
default:
weston_log("Unsupported pixman format 0x%x\n", format);
return -1;
}
/* FIXME error checking */
for (i = 0; i < ARRAY_LENGTH(output->dumb); i++) {
output->dumb[i] = drm_fb_create_dumb(b, w, h, format);
if (!output->dumb[i])
goto err;
output->image[i] =
pixman_image_create_bits(pixman_format, w, h,
output->dumb[i]->map,
output->dumb[i]->stride);
if (!output->image[i])
goto err;
}
if (pixman_renderer_output_create(&output->base) < 0)
goto err;
pixman_region32_init_rect(&output->previous_damage,
output->base.x, output->base.y, output->base.width, output->base.height);
return 0;
err:
for (i = 0; i < ARRAY_LENGTH(output->dumb); i++) {
if (output->dumb[i])
drm_fb_destroy_dumb(output->dumb[i]);
if (output->image[i])
pixman_image_unref(output->image[i]);
output->dumb[i] = NULL;
output->image[i] = NULL;
}
return -1;
}
static void
drm_output_fini_pixman(struct drm_output *output)
{
unsigned int i;
pixman_renderer_output_destroy(&output->base);
pixman_region32_fini(&output->previous_damage);
for (i = 0; i < ARRAY_LENGTH(output->dumb); i++) {
drm_fb_destroy_dumb(output->dumb[i]);
pixman_image_unref(output->image[i]);
output->dumb[i] = NULL;
output->image[i] = NULL;
}
}
static void
edid_parse_string(const uint8_t *data, char text[])
{
int i;
int replaced = 0;
/* this is always 12 bytes, but we can't guarantee it's null
* terminated or not junk. */
strncpy(text, (const char *) data, 12);
/* guarantee our new string is null-terminated */
text[12] = '\0';
/* remove insane chars */
for (i = 0; text[i] != '\0'; i++) {
if (text[i] == '\n' ||
text[i] == '\r') {
text[i] = '\0';
break;
}
}
/* ensure string is printable */
for (i = 0; text[i] != '\0'; i++) {
if (!isprint(text[i])) {
text[i] = '-';
replaced++;
}
}
/* if the string is random junk, ignore the string */
if (replaced > 4)
text[0] = '\0';
}
#define EDID_DESCRIPTOR_ALPHANUMERIC_DATA_STRING 0xfe
#define EDID_DESCRIPTOR_DISPLAY_PRODUCT_NAME 0xfc
#define EDID_DESCRIPTOR_DISPLAY_PRODUCT_SERIAL_NUMBER 0xff
#define EDID_OFFSET_DATA_BLOCKS 0x36
#define EDID_OFFSET_LAST_BLOCK 0x6c
#define EDID_OFFSET_PNPID 0x08
#define EDID_OFFSET_SERIAL 0x0c
static int
edid_parse(struct drm_edid *edid, const uint8_t *data, size_t length)
{
int i;
uint32_t serial_number;
/* check header */
if (length < 128)
return -1;
if (data[0] != 0x00 || data[1] != 0xff)
return -1;
/* decode the PNP ID from three 5 bit words packed into 2 bytes
* /--08--\/--09--\
* 7654321076543210
* |\---/\---/\---/
* R C1 C2 C3 */
edid->pnp_id[0] = 'A' + ((data[EDID_OFFSET_PNPID + 0] & 0x7c) / 4) - 1;
edid->pnp_id[1] = 'A' + ((data[EDID_OFFSET_PNPID + 0] & 0x3) * 8) + ((data[EDID_OFFSET_PNPID + 1] & 0xe0) / 32) - 1;
edid->pnp_id[2] = 'A' + (data[EDID_OFFSET_PNPID + 1] & 0x1f) - 1;
edid->pnp_id[3] = '\0';
/* maybe there isn't a ASCII serial number descriptor, so use this instead */
serial_number = (uint32_t) data[EDID_OFFSET_SERIAL + 0];
serial_number += (uint32_t) data[EDID_OFFSET_SERIAL + 1] * 0x100;
serial_number += (uint32_t) data[EDID_OFFSET_SERIAL + 2] * 0x10000;
serial_number += (uint32_t) data[EDID_OFFSET_SERIAL + 3] * 0x1000000;
if (serial_number > 0)
sprintf(edid->serial_number, "%lu", (unsigned long) serial_number);
/* parse EDID data */
for (i = EDID_OFFSET_DATA_BLOCKS;
i <= EDID_OFFSET_LAST_BLOCK;
i += 18) {
/* ignore pixel clock data */
if (data[i] != 0)
continue;
if (data[i+2] != 0)
continue;
/* any useful blocks? */
if (data[i+3] == EDID_DESCRIPTOR_DISPLAY_PRODUCT_NAME) {
edid_parse_string(&data[i+5],
edid->monitor_name);
} else if (data[i+3] == EDID_DESCRIPTOR_DISPLAY_PRODUCT_SERIAL_NUMBER) {
edid_parse_string(&data[i+5],
edid->serial_number);
} else if (data[i+3] == EDID_DESCRIPTOR_ALPHANUMERIC_DATA_STRING) {
edid_parse_string(&data[i+5],
edid->eisa_id);
}
}
return 0;
}
static void
find_and_parse_output_edid(struct drm_backend *b,
struct drm_output *output,
drmModeConnector *connector)
{
drmModePropertyBlobPtr edid_blob = NULL;
drmModePropertyPtr property;
int i;
int rc;
for (i = 0; i < connector->count_props && !edid_blob; i++) {
property = drmModeGetProperty(b->drm.fd, connector->props[i]);
if (!property)
continue;
if ((property->flags & DRM_MODE_PROP_BLOB) &&
!strcmp(property->name, "EDID")) {
edid_blob = drmModeGetPropertyBlob(b->drm.fd,
connector->prop_values[i]);
}
drmModeFreeProperty(property);
}
if (!edid_blob)
return;
rc = edid_parse(&output->edid,
edid_blob->data,
edid_blob->length);
if (!rc) {
weston_log("EDID data '%s', '%s', '%s'\n",
output->edid.pnp_id,
output->edid.monitor_name,
output->edid.serial_number);
if (output->edid.pnp_id[0] != '\0')
output->base.make = output->edid.pnp_id;
if (output->edid.monitor_name[0] != '\0')
output->base.model = output->edid.monitor_name;
if (output->edid.serial_number[0] != '\0')
output->base.serial_number = output->edid.serial_number;
}
drmModeFreePropertyBlob(edid_blob);
}
static int
parse_modeline(const char *s, drmModeModeInfo *mode)
{
char hsync[16];
char vsync[16];
float fclock;
mode->type = DRM_MODE_TYPE_USERDEF;
mode->hskew = 0;
mode->vscan = 0;
mode->vrefresh = 0;
mode->flags = 0;
if (sscanf(s, "%f %hd %hd %hd %hd %hd %hd %hd %hd %15s %15s",
&fclock,
&mode->hdisplay,
&mode->hsync_start,
&mode->hsync_end,
&mode->htotal,
&mode->vdisplay,
&mode->vsync_start,
&mode->vsync_end,
&mode->vtotal, hsync, vsync) != 11)
return -1;
mode->clock = fclock * 1000;
if (strcmp(hsync, "+hsync") == 0)
mode->flags |= DRM_MODE_FLAG_PHSYNC;
else if (strcmp(hsync, "-hsync") == 0)
mode->flags |= DRM_MODE_FLAG_NHSYNC;
else
return -1;
if (strcmp(vsync, "+vsync") == 0)
mode->flags |= DRM_MODE_FLAG_PVSYNC;
else if (strcmp(vsync, "-vsync") == 0)
mode->flags |= DRM_MODE_FLAG_NVSYNC;
else
return -1;
snprintf(mode->name, sizeof mode->name, "%dx%d@%.3f",
mode->hdisplay, mode->vdisplay, fclock);
return 0;
}
static void
setup_output_seat_constraint(struct drm_backend *b,
struct weston_output *output,
const char *s)
{
if (strcmp(s, "") != 0) {
struct weston_pointer *pointer;
struct udev_seat *seat;
seat = udev_seat_get_named(&b->input, s);
if (!seat)
return;
seat->base.output = output;
pointer = weston_seat_get_pointer(&seat->base);
if (pointer)
weston_pointer_clamp(pointer,
&pointer->x,
&pointer->y);
}
}
static int
parse_gbm_format(const char *s, uint32_t default_value, uint32_t *gbm_format)
{
int ret = 0;
if (s == NULL)
*gbm_format = default_value;
else if (strcmp(s, "xrgb8888") == 0)
*gbm_format = GBM_FORMAT_XRGB8888;
else if (strcmp(s, "rgb565") == 0)
*gbm_format = GBM_FORMAT_RGB565;
else if (strcmp(s, "xrgb2101010") == 0)
*gbm_format = GBM_FORMAT_XRGB2101010;
else {
weston_log("fatal: unrecognized pixel format: %s\n", s);
ret = -1;
}
return ret;
}
/**
* Choose suitable mode for an output
*
* Find the most suitable mode to use for initial setup (or reconfiguration on
* hotplug etc) for a DRM output.
*
* @param output DRM output to choose mode for
* @param kind Strategy and preference to use when choosing mode
* @param width Desired width for this output
* @param height Desired height for this output
* @param current_mode Mode currently being displayed on this output
* @param modeline Manually-entered mode (may be NULL)
* @returns A mode from the output's mode list, or NULL if none available
*/
static struct drm_mode *
drm_output_choose_initial_mode(struct drm_backend *backend,
struct drm_output *output,
enum weston_drm_backend_output_mode mode,
const char *modeline,
const drmModeModeInfo *current_mode)
{
struct drm_mode *preferred = NULL;
struct drm_mode *current = NULL;
struct drm_mode *configured = NULL;
struct drm_mode *best = NULL;
struct drm_mode *drm_mode;
drmModeModeInfo drm_modeline;
int32_t width = 0;
int32_t height = 0;
uint32_t refresh = 0;
int n;
if (mode == WESTON_DRM_BACKEND_OUTPUT_PREFERRED && modeline) {
n = sscanf(modeline, "%dx%d@%d", &width, &height, &refresh);
if (n != 2 && n != 3) {
width = -1;
if (parse_modeline(modeline, &drm_modeline) == 0) {
configured = drm_output_add_mode(output, &drm_modeline);
if (!configured)
return NULL;
} else {
weston_log("Invalid modeline \"%s\" for output %s\n",
modeline, output->base.name);
}
}
}
wl_list_for_each_reverse(drm_mode, &output->base.mode_list, base.link) {
if (width == drm_mode->base.width &&
height == drm_mode->base.height &&
(refresh == 0 || refresh == drm_mode->mode_info.vrefresh))
configured = drm_mode;
if (memcmp(current_mode, &drm_mode->mode_info,
sizeof *current_mode) == 0)
current = drm_mode;
if (drm_mode->base.flags & WL_OUTPUT_MODE_PREFERRED)
preferred = drm_mode;
best = drm_mode;
}
if (current == NULL && current_mode->clock != 0) {
current = drm_output_add_mode(output, current_mode);
if (!current)
return NULL;
}
if (mode == WESTON_DRM_BACKEND_OUTPUT_CURRENT)
configured = current;
if (configured)
return configured;
if (preferred)
return preferred;
if (current)
return current;
if (best)
return best;
weston_log("no available modes for %s\n", output->base.name);
return NULL;
}
static int
connector_get_current_mode(drmModeConnector *connector, int drm_fd,
drmModeModeInfo *mode)
{
drmModeEncoder *encoder;
drmModeCrtc *crtc;
/* Get the current mode on the crtc that's currently driving
* this connector. */
encoder = drmModeGetEncoder(drm_fd, connector->encoder_id);
memset(mode, 0, sizeof *mode);
if (encoder != NULL) {
crtc = drmModeGetCrtc(drm_fd, encoder->crtc_id);
drmModeFreeEncoder(encoder);
if (crtc == NULL)
return -1;
if (crtc->mode_valid)
*mode = crtc->mode;
drmModeFreeCrtc(crtc);
}
return 0;
}
static int
drm_output_set_mode(struct weston_output *base,
enum weston_drm_backend_output_mode mode,
const char *modeline)
{
struct drm_output *output = to_drm_output(base);
struct drm_backend *b = to_drm_backend(base->compositor);
struct drm_mode *current;
drmModeModeInfo crtc_mode;
output->base.make = "unknown";
output->base.model = "unknown";
output->base.serial_number = "unknown";
if (connector_get_current_mode(output->connector, b->drm.fd, &crtc_mode) < 0)
return -1;
current = drm_output_choose_initial_mode(b, output, mode, modeline, &crtc_mode);
if (!current)
return -1;
output->base.current_mode = &current->base;
output->base.current_mode->flags |= WL_OUTPUT_MODE_CURRENT;
/* Set native_ fields, so weston_output_mode_switch_to_native() works */
output->base.native_mode = output->base.current_mode;
output->base.native_scale = output->base.current_scale;
output->base.mm_width = output->connector->mmWidth;
output->base.mm_height = output->connector->mmHeight;
return 0;
}
static void
drm_output_set_gbm_format(struct weston_output *base,
const char *gbm_format)
{
struct drm_output *output = to_drm_output(base);
struct drm_backend *b = to_drm_backend(base->compositor);
if (parse_gbm_format(gbm_format, b->gbm_format, &output->gbm_format) == -1)
output->gbm_format = b->gbm_format;
}
static void
drm_output_set_seat(struct weston_output *base,
const char *seat)
{
struct drm_output *output = to_drm_output(base);
struct drm_backend *b = to_drm_backend(base->compositor);
setup_output_seat_constraint(b, &output->base,
seat ? seat : "");
}
static int
drm_output_enable(struct weston_output *base)
{
struct drm_output *output = to_drm_output(base);
struct drm_backend *b = to_drm_backend(base->compositor);
struct weston_mode *m;
output->dpms_prop = drm_get_prop(b->drm.fd, output->connector, "DPMS");
if (b->use_pixman) {
if (drm_output_init_pixman(output, b) < 0) {
weston_log("Failed to init output pixman state\n");
goto err_free;
}
} else if (drm_output_init_egl(output, b) < 0) {
weston_log("Failed to init output gl state\n");
goto err_free;
}
if (output->backlight) {
weston_log("Initialized backlight, device %s\n",
output->backlight->path);
output->base.set_backlight = drm_set_backlight;
output->base.backlight_current = drm_get_backlight(output);
} else {
weston_log("Failed to initialize backlight\n");
}
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.gamma_size = output->original_crtc->gamma_size;
output->base.set_gamma = drm_output_set_gamma;
output->base.subpixel = drm_subpixel_to_wayland(output->connector->subpixel);
find_and_parse_output_edid(b, output, output->connector);
if (output->connector->connector_type == DRM_MODE_CONNECTOR_LVDS ||
output->connector->connector_type == DRM_MODE_CONNECTOR_eDP)
output->base.connection_internal = 1;
weston_plane_init(&output->cursor_plane, b->compositor,
INT32_MIN, INT32_MIN);
weston_plane_init(&output->fb_plane, b->compositor, 0, 0);
weston_compositor_stack_plane(b->compositor, &output->cursor_plane, NULL);
weston_compositor_stack_plane(b->compositor, &output->fb_plane,
&b->compositor->primary_plane);
weston_log("Output %s, (connector %d, crtc %d)\n",
output->base.name, output->connector_id, output->crtc_id);
wl_list_for_each(m, &output->base.mode_list, link)
weston_log_continue(STAMP_SPACE "mode %dx%d@%.1f%s%s%s\n",
m->width, m->height, m->refresh / 1000.0,
m->flags & WL_OUTPUT_MODE_PREFERRED ?
", preferred" : "",
m->flags & WL_OUTPUT_MODE_CURRENT ?
", current" : "",
output->connector->count_modes == 0 ?
", built-in" : "");
return 0;
err_free:
drmModeFreeProperty(output->dpms_prop);
return -1;
}
static void
drm_output_deinit(struct weston_output *base)
{
struct drm_output *output = to_drm_output(base);
struct drm_backend *b = to_drm_backend(base->compositor);
if (b->use_pixman)
drm_output_fini_pixman(output);
else
drm_output_fini_egl(output);
weston_plane_release(&output->fb_plane);
weston_plane_release(&output->cursor_plane);
drmModeFreeProperty(output->dpms_prop);
/* Turn off hardware cursor */
drmModeSetCursor(b->drm.fd, output->crtc_id, 0, 0, 0);
}
static void
drm_output_destroy(struct weston_output *base)
{
struct drm_output *output = to_drm_output(base);
struct drm_backend *b = to_drm_backend(base->compositor);
struct drm_mode *drm_mode, *next;
drmModeCrtcPtr origcrtc = output->original_crtc;
if (output->page_flip_pending) {
output->destroy_pending = 1;
weston_log("destroy output while page flip pending\n");
return;
}
if (output->base.enabled)
drm_output_deinit(&output->base);
wl_list_for_each_safe(drm_mode, next, &output->base.mode_list,
base.link) {
wl_list_remove(&drm_mode->base.link);
free(drm_mode);
}
if (origcrtc) {
/* Restore original CRTC state */
drmModeSetCrtc(b->drm.fd, origcrtc->crtc_id, origcrtc->buffer_id,
origcrtc->x, origcrtc->y,
&output->connector_id, 1, &origcrtc->mode);
drmModeFreeCrtc(origcrtc);
}
weston_output_destroy(&output->base);
drmModeFreeConnector(output->connector);
if (output->backlight)
backlight_destroy(output->backlight);
free(output);
}
static int
drm_output_disable(struct weston_output *base)
{
struct drm_output *output = to_drm_output(base);
struct drm_backend *b = to_drm_backend(base->compositor);
if (output->page_flip_pending) {
output->disable_pending = 1;
return -1;
}
if (output->base.enabled)
drm_output_deinit(&output->base);
output->disable_pending = 0;
weston_log("Disabling output %s\n", output->base.name);
drmModeSetCrtc(b->drm.fd, output->crtc_id,
0, 0, 0, 0, 0, NULL);
return 0;
}
/**
* Create a Weston output structure
*
* Given a DRM connector, create a matching drm_output structure and add it
* to Weston's output list. It also takes ownership of the connector, which
* is released when output is destroyed.
*
* @param b Weston backend structure
* @param resources DRM resources for this device
* @param connector DRM connector to use for this new output
* @param drm_device udev device pointer
* @returns 0 on success, or -1 on failure
*/
static int
create_output_for_connector(struct drm_backend *b,
drmModeRes *resources,
drmModeConnector *connector,
struct udev_device *drm_device)
{
struct drm_output *output;
struct drm_mode *drm_mode;
int i;
i = find_crtc_for_connector(b, resources, connector);
if (i < 0) {
weston_log("No usable crtc/encoder pair for connector.\n");
goto err;
}
output = zalloc(sizeof *output);
if (output == NULL)
goto err;
output->connector = connector;
output->crtc_id = resources->crtcs[i];
output->pipe = i;
output->connector_id = connector->connector_id;
output->backlight = backlight_init(drm_device,
connector->connector_type);
output->original_crtc = drmModeGetCrtc(b->drm.fd, output->crtc_id);
output->base.enable = drm_output_enable;
output->base.destroy = drm_output_destroy;
output->base.disable = drm_output_disable;
output->base.name = make_connector_name(connector);
output->destroy_pending = 0;
output->disable_pending = 0;
weston_output_init(&output->base, b->compositor);
wl_list_init(&output->base.mode_list);
for (i = 0; i < output->connector->count_modes; i++) {
drm_mode = drm_output_add_mode(output, &output->connector->modes[i]);
if (!drm_mode) {
drm_output_destroy(&output->base);
return -1;
}
}
weston_compositor_add_pending_output(&output->base, b->compositor);
return 0;
err:
drmModeFreeConnector(connector);
return -1;
}
static void
create_sprites(struct drm_backend *b)
{
struct drm_sprite *sprite;
drmModePlaneRes *plane_res;
drmModePlane *plane;
uint32_t i;
plane_res = drmModeGetPlaneResources(b->drm.fd);
if (!plane_res) {
weston_log("failed to get plane resources: %s\n",
strerror(errno));
return;
}
for (i = 0; i < plane_res->count_planes; i++) {
plane = drmModeGetPlane(b->drm.fd, plane_res->planes[i]);
if (!plane)
continue;
sprite = zalloc(sizeof(*sprite) + ((sizeof(uint32_t)) *
plane->count_formats));
if (!sprite) {
weston_log("%s: out of memory\n",
__func__);
drmModeFreePlane(plane);
continue;
}
sprite->possible_crtcs = plane->possible_crtcs;
sprite->plane_id = plane->plane_id;
sprite->current = NULL;
sprite->next = NULL;
sprite->backend = b;
sprite->count_formats = plane->count_formats;
memcpy(sprite->formats, plane->formats,
plane->count_formats * sizeof(plane->formats[0]));
drmModeFreePlane(plane);
weston_plane_init(&sprite->plane, b->compositor, 0, 0);
weston_compositor_stack_plane(b->compositor, &sprite->plane,
&b->compositor->primary_plane);
wl_list_insert(&b->sprite_list, &sprite->link);
}
drmModeFreePlaneResources(plane_res);
}
static void
destroy_sprites(struct drm_backend *backend)
{
struct drm_sprite *sprite, *next;
struct drm_output *output;
output = container_of(backend->compositor->output_list.next,
struct drm_output, base.link);
wl_list_for_each_safe(sprite, next, &backend->sprite_list, link) {
drmModeSetPlane(backend->drm.fd,
sprite->plane_id,
output->crtc_id, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0);
drm_output_release_fb(output, sprite->current);
drm_output_release_fb(output, sprite->next);
weston_plane_release(&sprite->plane);
free(sprite);
}
}
static int
create_outputs(struct drm_backend *b, struct udev_device *drm_device)
{
drmModeConnector *connector;
drmModeRes *resources;
int i;
resources = drmModeGetResources(b->drm.fd);
if (!resources) {
weston_log("drmModeGetResources failed\n");
return -1;
}
b->min_width = resources->min_width;
b->max_width = resources->max_width;
b->min_height = resources->min_height;
b->max_height = resources->max_height;
for (i = 0; i < resources->count_connectors; i++) {
connector = drmModeGetConnector(b->drm.fd,
resources->connectors[i]);
if (connector == NULL)
continue;
if (connector->connection == DRM_MODE_CONNECTED &&
(b->connector == 0 ||
connector->connector_id == b->connector)) {
if (create_output_for_connector(b, resources,
connector, drm_device) < 0)
continue;
} else {
drmModeFreeConnector(connector);
}
}
if (wl_list_empty(&b->compositor->output_list) &&
wl_list_empty(&b->compositor->pending_output_list))
weston_log("No currently active connector found.\n");
drmModeFreeResources(resources);
return 0;
}
static void
update_outputs(struct drm_backend *b, struct udev_device *drm_device)
{
drmModeConnector *connector;
drmModeRes *resources;
struct drm_output *output, *next;
uint32_t *connected;
int i;
resources = drmModeGetResources(b->drm.fd);
if (!resources) {
weston_log("drmModeGetResources failed\n");
return;
}
connected = calloc(resources->count_connectors, sizeof(uint32_t));
if (!connected) {
drmModeFreeResources(resources);
return;
}
/* collect new connects */
for (i = 0; i < resources->count_connectors; i++) {
uint32_t connector_id = resources->connectors[i];
connector = drmModeGetConnector(b->drm.fd, connector_id);
if (connector == NULL)
continue;
if (connector->connection != DRM_MODE_CONNECTED) {
drmModeFreeConnector(connector);
continue;
}
if (b->connector && (b->connector != connector_id)) {
drmModeFreeConnector(connector);
continue;
}
connected[i] = connector_id;
if (drm_output_find_by_connector(b, connector_id)) {
drmModeFreeConnector(connector);
continue;
}
create_output_for_connector(b, resources,
connector, drm_device);
weston_log("connector %d connected\n", connector_id);
}
wl_list_for_each_safe(output, next, &b->compositor->output_list,
base.link) {
bool disconnected = true;
for (i = 0; i < resources->count_connectors; i++) {
if (connected[i] == output->connector_id) {
disconnected = false;
break;
}
}
if (!disconnected)
continue;
weston_log("connector %d disconnected\n", output->connector_id);
drm_output_destroy(&output->base);
}
wl_list_for_each_safe(output, next, &b->compositor->pending_output_list,
base.link) {
bool disconnected = true;
for (i = 0; i < resources->count_connectors; i++) {
if (connected[i] == output->connector_id) {
disconnected = false;
break;
}
}
if (!disconnected)
continue;
weston_log("connector %d disconnected\n", output->connector_id);
drm_output_destroy(&output->base);
}
free(connected);
drmModeFreeResources(resources);
}
static int
udev_event_is_hotplug(struct drm_backend *b, struct udev_device *device)
{
const char *sysnum;
const char *val;
sysnum = udev_device_get_sysnum(device);
if (!sysnum || atoi(sysnum) != b->drm.id)
return 0;
val = udev_device_get_property_value(device, "HOTPLUG");
if (!val)
return 0;
return strcmp(val, "1") == 0;
}
static int
udev_drm_event(int fd, uint32_t mask, void *data)
{
struct drm_backend *b = data;
struct udev_device *event;
event = udev_monitor_receive_device(b->udev_monitor);
if (udev_event_is_hotplug(b, event))
update_outputs(b, event);
udev_device_unref(event);
return 1;
}
static void
drm_restore(struct weston_compositor *ec)
{
weston_launcher_restore(ec->launcher);
}
static void
drm_destroy(struct weston_compositor *ec)
{
struct drm_backend *b = to_drm_backend(ec);
udev_input_destroy(&b->input);
wl_event_source_remove(b->udev_drm_source);
wl_event_source_remove(b->drm_source);
destroy_sprites(b);
weston_compositor_shutdown(ec);
if (b->gbm)
gbm_device_destroy(b->gbm);
weston_launcher_destroy(ec->launcher);
close(b->drm.fd);
free(b);
}
static void
session_notify(struct wl_listener *listener, void *data)
{
struct weston_compositor *compositor = data;
struct drm_backend *b = to_drm_backend(compositor);
struct drm_sprite *sprite;
struct drm_output *output;
if (compositor->session_active) {
weston_log("activating session\n");
weston_compositor_wake(compositor);
weston_compositor_damage_all(compositor);
udev_input_enable(&b->input);
} else {
weston_log("deactivating session\n");
udev_input_disable(&b->input);
weston_compositor_offscreen(compositor);
/* If we have a repaint scheduled (either from a
* pending pageflip or the idle handler), make sure we
* cancel that so we don't try to pageflip when we're
* vt switched away. The OFFSCREEN state will prevent
* further attempts at repainting. When we switch
* back, we schedule a repaint, which will process
* pending frame callbacks. */
wl_list_for_each(output, &compositor->output_list, base.link) {
output->base.repaint_needed = 0;
drmModeSetCursor(b->drm.fd, output->crtc_id, 0, 0, 0);
}
output = container_of(compositor->output_list.next,
struct drm_output, base.link);
wl_list_for_each(sprite, &b->sprite_list, link)
drmModeSetPlane(b->drm.fd,
sprite->plane_id,
output->crtc_id, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0);
};
}
/**
* Determines whether or not a device is capable of modesetting. If successful,
* sets b->drm.fd and b->drm.filename to the opened device.
*/
static bool
drm_device_is_kms(struct drm_backend *b, struct udev_device *device)
{
const char *filename = udev_device_get_devnode(device);
const char *sysnum = udev_device_get_sysnum(device);
drmModeRes *res;
int id, fd;
if (!filename)
return false;
fd = weston_launcher_open(b->compositor->launcher, filename, O_RDWR);
if (fd < 0)
return false;
res = drmModeGetResources(fd);
if (!res)
goto out_fd;
if (res->count_crtcs <= 0 || res->count_connectors <= 0 ||
res->count_encoders <= 0)
goto out_res;
if (sysnum)
id = atoi(sysnum);
if (!sysnum || id < 0) {
weston_log("couldn't get sysnum for device %s\n", filename);
goto out_res;
}
/* We can be called successfully on multiple devices; if we have,
* clean up old entries. */
if (b->drm.fd >= 0)
weston_launcher_close(b->compositor->launcher, b->drm.fd);
free(b->drm.filename);
b->drm.fd = fd;
b->drm.id = id;
b->drm.filename = strdup(filename);
return true;
out_res:
drmModeFreeResources(res);
out_fd:
weston_launcher_close(b->compositor->launcher, fd);
return false;
}
/*
* Find primary GPU
* Some systems may have multiple DRM devices attached to a single seat. This
* function loops over all devices and tries to find a PCI device with the
* boot_vga sysfs attribute set to 1.
* If no such device is found, the first DRM device reported by udev is used.
* Devices are also vetted to make sure they are are capable of modesetting,
* rather than pure render nodes (GPU with no display), or pure
* memory-allocation devices (VGEM).
*/
static struct udev_device*
find_primary_gpu(struct drm_backend *b, const char *seat)
{
struct udev_enumerate *e;
struct udev_list_entry *entry;
const char *path, *device_seat, *id;
struct udev_device *device, *drm_device, *pci;
e = udev_enumerate_new(b->udev);
udev_enumerate_add_match_subsystem(e, "drm");
udev_enumerate_add_match_sysname(e, "card[0-9]*");
udev_enumerate_scan_devices(e);
drm_device = NULL;
udev_list_entry_foreach(entry, udev_enumerate_get_list_entry(e)) {
bool is_boot_vga = false;
path = udev_list_entry_get_name(entry);
device = udev_device_new_from_syspath(b->udev, path);
if (!device)
continue;
device_seat = udev_device_get_property_value(device, "ID_SEAT");
if (!device_seat)
device_seat = default_seat;
if (strcmp(device_seat, seat)) {
udev_device_unref(device);
continue;
}
pci = udev_device_get_parent_with_subsystem_devtype(device,
"pci", NULL);
if (pci) {
id = udev_device_get_sysattr_value(pci, "boot_vga");
if (id && !strcmp(id, "1"))
is_boot_vga = true;
}
/* If we already have a modesetting-capable device, and this
* device isn't our boot-VGA device, we aren't going to use
* it. */
if (!is_boot_vga && drm_device) {
udev_device_unref(device);
continue;
}
/* Make sure this device is actually capable of modesetting;
* if this call succeeds, b->drm.{fd,filename} will be set,
* and any old values freed. */
if (!drm_device_is_kms(b, device)) {
udev_device_unref(device);
continue;
}
/* There can only be one boot_vga device, and we try to use it
* at all costs. */
if (is_boot_vga) {
if (drm_device)
udev_device_unref(drm_device);
drm_device = device;
break;
}
/* Per the (!is_boot_vga && drm_device) test above, we only
* trump existing saved devices with boot-VGA devices, so if
* we end up here, this must be the first device we've seen. */
assert(!drm_device);
drm_device = device;
}
/* If we're returning a device to use, we must have an open FD for
* it. */
assert(!!drm_device == (b->drm.fd >= 0));
udev_enumerate_unref(e);
return drm_device;
}
static void
planes_binding(struct weston_keyboard *keyboard, uint32_t time, uint32_t key,
void *data)
{
struct drm_backend *b = data;
switch (key) {
case KEY_C:
b->cursors_are_broken ^= 1;
break;
case KEY_V:
b->sprites_are_broken ^= 1;
break;
case KEY_O:
b->sprites_hidden ^= 1;
break;
default:
break;
}
}
#ifdef BUILD_VAAPI_RECORDER
static void
recorder_destroy(struct drm_output *output)
{
vaapi_recorder_destroy(output->recorder);
output->recorder = NULL;
output->base.disable_planes--;
wl_list_remove(&output->recorder_frame_listener.link);
weston_log("[libva recorder] done\n");
}
static void
recorder_frame_notify(struct wl_listener *listener, void *data)
{
struct drm_output *output;
struct drm_backend *b;
int fd, ret;
output = container_of(listener, struct drm_output,
recorder_frame_listener);
b = to_drm_backend(output->base.compositor);
if (!output->recorder)
return;
ret = drmPrimeHandleToFD(b->drm.fd, output->current->handle,
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->current->stride);
if (ret < 0) {
weston_log("[libva recorder] aborted: %m\n");
recorder_destroy(output);
}
}
static void *
create_recorder(struct drm_backend *b, int width, int height,
const char *filename)
{
int fd;
drm_magic_t magic;
fd = open(b->drm.filename, O_RDWR | O_CLOEXEC);
if (fd < 0)
return NULL;
drmGetMagic(fd, &magic);
drmAuthMagic(b->drm.fd, magic);
return vaapi_recorder_create(fd, width, height, filename);
}
static void
recorder_binding(struct weston_keyboard *keyboard, uint32_t time, uint32_t key,
void *data)
{
struct drm_backend *b = data;
struct drm_output *output;
int width, height;
output = container_of(b->compositor->output_list.next,
struct drm_output, base.link);
if (!output->recorder) {
if (output->gbm_format != GBM_FORMAT_XRGB8888) {
weston_log("failed to start vaapi recorder: "
"output format not supported\n");
return;
}
width = output->base.current_mode->width;
height = output->base.current_mode->height;
output->recorder =
create_recorder(b, width, height, "capture.h264");
if (!output->recorder) {
weston_log("failed to create vaapi recorder\n");
return;
}
output->base.disable_planes++;
output->recorder_frame_listener.notify = recorder_frame_notify;
wl_signal_add(&output->base.frame_signal,
&output->recorder_frame_listener);
weston_output_schedule_repaint(&output->base);
weston_log("[libva recorder] initialized\n");
} else {
recorder_destroy(output);
}
}
#else
static void
recorder_binding(struct weston_keyboard *keyboard, uint32_t time, uint32_t key,
void *data)
{
weston_log("Compiled without libva support\n");
}
#endif
static void
switch_to_gl_renderer(struct drm_backend *b)
{
struct drm_output *output;
bool dmabuf_support_inited;
if (!b->use_pixman)
return;
dmabuf_support_inited = !!b->compositor->renderer->import_dmabuf;
weston_log("Switching to GL renderer\n");
b->gbm = create_gbm_device(b->drm.fd);
if (!b->gbm) {
weston_log("Failed to create gbm device. "
"Aborting renderer switch\n");
return;
}
wl_list_for_each(output, &b->compositor->output_list, base.link)
pixman_renderer_output_destroy(&output->base);
b->compositor->renderer->destroy(b->compositor);
if (drm_backend_create_gl_renderer(b) < 0) {
gbm_device_destroy(b->gbm);
weston_log("Failed to create GL renderer. Quitting.\n");
/* FIXME: we need a function to shutdown cleanly */
assert(0);
}
wl_list_for_each(output, &b->compositor->output_list, base.link)
drm_output_init_egl(output, b);
b->use_pixman = 0;
if (!dmabuf_support_inited && b->compositor->renderer->import_dmabuf) {
if (linux_dmabuf_setup(b->compositor) < 0)
weston_log("Error: initializing dmabuf "
"support failed.\n");
}
}
static void
renderer_switch_binding(struct weston_keyboard *keyboard, uint32_t time,
uint32_t key, void *data)
{
struct drm_backend *b =
to_drm_backend(keyboard->seat->compositor);
switch_to_gl_renderer(b);
}
static const struct weston_drm_output_api api = {
drm_output_set_mode,
drm_output_set_gbm_format,
drm_output_set_seat,
};
static struct drm_backend *
drm_backend_create(struct weston_compositor *compositor,
struct weston_drm_backend_config *config)
{
struct drm_backend *b;
struct udev_device *drm_device;
struct wl_event_loop *loop;
const char *seat_id = default_seat;
int ret;
weston_log("initializing drm backend\n");
b = zalloc(sizeof *b);
if (b == NULL)
return NULL;
b->drm.fd = -1;
/*
* KMS support for hardware planes cannot properly synchronize
* without nuclear page flip. Without nuclear/atomic, hw plane
* and cursor plane updates would either tear or cause extra
* waits for vblanks which means dropping the compositor framerate
* to a fraction. For cursors, it's not so bad, so they are
* enabled.
*
* These can be enabled again when nuclear/atomic support lands.
*/
b->sprites_are_broken = 1;
b->compositor = compositor;
b->use_pixman = config->use_pixman;
if (parse_gbm_format(config->gbm_format, GBM_FORMAT_XRGB8888, &b->gbm_format) < 0)
goto err_compositor;
if (config->seat_id)
seat_id = config->seat_id;
/* Check if we run drm-backend using weston-launch */
compositor->launcher = weston_launcher_connect(compositor, config->tty,
seat_id, true);
if (compositor->launcher == NULL) {
weston_log("fatal: drm backend should be run "
"using weston-launch binary or as root\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);
drm_device = find_primary_gpu(b, seat_id);
if (drm_device == NULL) {
weston_log("no drm device found\n");
goto err_udev;
}
if (init_kms_caps(b) < 0) {
weston_log("failed to initialize kms\n");
goto err_udev_dev;
}
if (b->use_pixman) {
if (init_pixman(b) < 0) {
weston_log("failed to initialize pixman renderer\n");
goto err_udev_dev;
}
} else {
if (init_egl(b) < 0) {
weston_log("failed to initialize egl\n");
goto err_udev_dev;
}
}
b->base.destroy = drm_destroy;
b->base.restore = drm_restore;
weston_setup_vt_switch_bindings(compositor);
wl_list_init(&b->sprite_list);
create_sprites(b);
if (udev_input_init(&b->input,
compositor, b->udev, seat_id,
config->configure_device) < 0) {
weston_log("failed to create input devices\n");
goto err_sprite;
}
b->connector = config->connector;
if (create_outputs(b, drm_device) < 0) {
weston_log("failed to create output for %s\n", b->drm.filename);
goto err_udev_input;
}
/* A this point we have some idea of whether or not we have a working
* cursor plane. */
if (!b->cursors_are_broken)
compositor->capabilities |= WESTON_CAP_CURSOR_PLANE;
loop = wl_display_get_event_loop(compositor->wl_display);
b->drm_source =
wl_event_loop_add_fd(loop, b->drm.fd,
WL_EVENT_READABLE, on_drm_input, b);
b->udev_monitor = udev_monitor_new_from_netlink(b->udev, "udev");
if (b->udev_monitor == NULL) {
weston_log("failed to initialize udev monitor\n");
goto err_drm_source;
}
udev_monitor_filter_add_match_subsystem_devtype(b->udev_monitor,
"drm", NULL);
b->udev_drm_source =
wl_event_loop_add_fd(loop,
udev_monitor_get_fd(b->udev_monitor),
WL_EVENT_READABLE, udev_drm_event, b);
if (udev_monitor_enable_receiving(b->udev_monitor) < 0) {
weston_log("failed to enable udev-monitor receiving\n");
goto err_udev_monitor;
}
udev_device_unref(drm_device);
weston_compositor_add_debug_binding(compositor, KEY_O,
planes_binding, b);
weston_compositor_add_debug_binding(compositor, KEY_C,
planes_binding, b);
weston_compositor_add_debug_binding(compositor, KEY_V,
planes_binding, b);
weston_compositor_add_debug_binding(compositor, KEY_Q,
recorder_binding, b);
weston_compositor_add_debug_binding(compositor, KEY_W,
renderer_switch_binding, b);
if (compositor->renderer->import_dmabuf) {
if (linux_dmabuf_setup(compositor) < 0)
weston_log("Error: initializing dmabuf "
"support failed.\n");
}
compositor->backend = &b->base;
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;
}
return b;
err_udev_monitor:
wl_event_source_remove(b->udev_drm_source);
udev_monitor_unref(b->udev_monitor);
err_drm_source:
wl_event_source_remove(b->drm_source);
err_udev_input:
udev_input_destroy(&b->input);
err_sprite:
if (b->gbm)
gbm_device_destroy(b->gbm);
destroy_sprites(b);
err_udev_dev:
udev_device_unref(drm_device);
err_launcher:
weston_launcher_destroy(compositor->launcher);
err_udev:
udev_unref(b->udev);
err_compositor:
weston_compositor_shutdown(compositor);
free(b);
return NULL;
}
static void
config_init_to_defaults(struct weston_drm_backend_config *config)
{
}
WL_EXPORT int
weston_backend_init(struct weston_compositor *compositor,
struct weston_backend_config *config_base)
{
struct drm_backend *b;
struct weston_drm_backend_config config = {{ 0, }};
if (config_base == NULL ||
config_base->struct_version != WESTON_DRM_BACKEND_CONFIG_VERSION ||
config_base->struct_size > sizeof(struct weston_drm_backend_config)) {
weston_log("drm backend config structure is invalid\n");
return -1;
}
config_init_to_defaults(&config);
memcpy(&config, config_base, config_base->struct_size);
b = drm_backend_create(compositor, &config);
if (b == NULL)
return -1;
return 0;
}
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