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weston/src/compositor-drm.c

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/*
* Copyright © 2008-2011 Kristian Høgsberg
* Copyright © 2011 Intel Corporation
*
* Permission to use, copy, modify, distribute, and sell this software and
* its documentation for any purpose is hereby granted without fee, provided
* that the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of the copyright holders not be used in
* advertising or publicity pertaining to distribution of the software
* without specific, written prior permission. The copyright holders make
* no representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
* CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#define _GNU_SOURCE
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <xf86drm.h>
#include <xf86drmMode.h>
#include <drm_fourcc.h>
#include <gbm.h>
#include <libbacklight.h>
#include "compositor.h"
#include "evdev.h"
struct drm_compositor {
struct weston_compositor base;
struct udev *udev;
struct wl_event_source *drm_source;
struct udev_monitor *udev_monitor;
struct wl_event_source *udev_drm_source;
struct {
int fd;
} drm;
struct gbm_device *gbm;
uint32_t *crtcs;
int num_crtcs;
uint32_t crtc_allocator;
uint32_t connector_allocator;
struct tty *tty;
struct wl_list sprite_list;
uint32_t prev_state;
};
struct drm_mode {
struct weston_mode base;
drmModeModeInfo mode_info;
};
struct drm_output {
struct weston_output base;
uint32_t crtc_id;
uint32_t connector_id;
drmModeCrtcPtr original_crtc;
GLuint rbo[2];
uint32_t fb_id[2];
EGLImageKHR image[2];
struct gbm_bo *bo[2];
uint32_t current;
uint32_t fs_surf_fb_id;
uint32_t pending_fs_surf_fb_id;
struct wl_buffer *scanout_buffer;
struct wl_listener scanout_buffer_destroy_listener;
struct wl_buffer *pending_scanout_buffer;
struct wl_listener pending_scanout_buffer_destroy_listener;
struct backlight *backlight;
};
/*
* An output has a primary display plane plus zero or more sprites for
* blending display contents.
*/
struct drm_sprite {
struct wl_list link;
uint32_t fb_id;
uint32_t pending_fb_id;
struct weston_surface *surface;
struct weston_surface *pending_surface;
struct drm_compositor *compositor;
struct wl_listener destroy_listener;
struct wl_listener pending_destroy_listener;
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 int
surface_is_primary(struct weston_compositor *ec, struct weston_surface *es)
{
struct weston_surface *primary;
primary = container_of(ec->surface_list.next, struct weston_surface,
link);
if (es == primary)
return -1;
return 0;
}
static int
drm_sprite_crtc_supported(struct weston_output *output_base, uint32_t supported)
{
struct weston_compositor *ec = output_base->compositor;
struct drm_compositor *c =(struct drm_compositor *) ec;
struct drm_output *output = (struct drm_output *) output_base;
int crtc;
for (crtc = 0; crtc < c->num_crtcs; crtc++) {
if (c->crtcs[crtc] != output->crtc_id)
continue;
if (supported & (1 << crtc))
return -1;
}
return 0;
}
static int
drm_output_prepare_scanout_surface(struct drm_output *output)
{
struct drm_compositor *c =
(struct drm_compositor *) output->base.compositor;
struct weston_surface *es;
EGLint handle, stride;
int ret;
uint32_t fb_id = 0;
struct gbm_bo *bo;
es = container_of(c->base.surface_list.next,
struct weston_surface, link);
/* Need to verify output->region contained in surface opaque
* region. Or maybe just that format doesn't have alpha. */
return -1;
if (es->geometry.x != output->base.x ||
es->geometry.y != output->base.y ||
es->geometry.width != output->base.current->width ||
es->geometry.height != output->base.current->height ||
es->transform.enabled ||
es->image == EGL_NO_IMAGE_KHR)
return -1;
bo = gbm_bo_create_from_egl_image(c->gbm,
c->base.display, es->image,
es->geometry.width,
es->geometry.height,
GBM_BO_USE_SCANOUT);
handle = gbm_bo_get_handle(bo).s32;
stride = gbm_bo_get_pitch(bo);
gbm_bo_destroy(bo);
if (handle == 0)
return -1;
ret = drmModeAddFB(c->drm.fd,
output->base.current->width,
output->base.current->height,
24, 32, stride, handle, &fb_id);
if (ret)
return -1;
output->pending_fs_surf_fb_id = fb_id;
/* assert output->pending_scanout_buffer == NULL */
output->pending_scanout_buffer = es->buffer;
output->pending_scanout_buffer->busy_count++;
wl_list_insert(output->pending_scanout_buffer->resource.destroy_listener_list.prev,
&output->pending_scanout_buffer_destroy_listener.link);
pixman_region32_fini(&es->damage);
pixman_region32_init(&es->damage);
return 0;
}
static void
drm_output_repaint(struct weston_output *output_base,
pixman_region32_t *damage)
{
struct drm_output *output = (struct drm_output *) output_base;
struct drm_compositor *compositor =
(struct drm_compositor *) output->base.compositor;
struct weston_surface *surface;
struct drm_sprite *s;
uint32_t fb_id = 0;
int ret = 0;
glFramebufferRenderbuffer(GL_FRAMEBUFFER,
GL_COLOR_ATTACHMENT0,
GL_RENDERBUFFER,
output->rbo[output->current]);
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
return;
drm_output_prepare_scanout_surface(output);
wl_list_for_each_reverse(surface, &compositor->base.surface_list, link)
weston_surface_draw(surface, &output->base, damage);
glFlush();
output->current ^= 1;
if (output->pending_fs_surf_fb_id != 0) {
fb_id = output->pending_fs_surf_fb_id;
} else {
fb_id = output->fb_id[output->current ^ 1];
}
if (drmModePageFlip(compositor->drm.fd, output->crtc_id,
fb_id,
DRM_MODE_PAGE_FLIP_EVENT, output) < 0) {
fprintf(stderr, "queueing pageflip failed: %m\n");
return;
}
/*
* Now, update all the sprite surfaces
*/
wl_list_for_each(s, &compositor->sprite_list, link) {
uint32_t flags = 0;
drmVBlank vbl = {
.request.type = DRM_VBLANK_RELATIVE | DRM_VBLANK_EVENT,
.request.sequence = 1,
};
if (!drm_sprite_crtc_supported(output_base, s->possible_crtcs))
continue;
ret = drmModeSetPlane(compositor->drm.fd, s->plane_id,
output->crtc_id, s->pending_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)
fprintf(stderr, "setplane failed: %d: %s\n",
ret, strerror(errno));
/*
* 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(compositor->drm.fd, &vbl);
if (ret) {
fprintf(stderr, "vblank event request failed: %d: %s\n",
ret, strerror(errno));
}
}
return;
}
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_compositor *c = s->compositor;
if (s->surface) {
weston_buffer_post_release(s->surface->buffer);
wl_list_remove(&s->destroy_listener.link);
s->surface = NULL;
drmModeRmFB(c->drm.fd, s->fb_id);
s->fb_id = 0;
}
if (s->pending_surface) {
wl_list_remove(&s->pending_destroy_listener.link);
wl_list_insert(s->pending_surface->buffer->resource.destroy_listener_list.prev,
&s->destroy_listener.link);
s->surface = s->pending_surface;
s->pending_surface = NULL;
s->fb_id = s->pending_fb_id;
s->pending_fb_id = 0;
}
}
static void
page_flip_handler(int fd, unsigned int frame,
unsigned int sec, unsigned int usec, void *data)
{
struct drm_output *output = (struct drm_output *) data;
struct drm_compositor *c =
(struct drm_compositor *) output->base.compositor;
uint32_t msecs;
if (output->scanout_buffer) {
weston_buffer_post_release(output->scanout_buffer);
wl_list_remove(&output->scanout_buffer_destroy_listener.link);
output->scanout_buffer = NULL;
drmModeRmFB(c->drm.fd, output->fs_surf_fb_id);
output->fs_surf_fb_id = 0;
}
if (output->pending_scanout_buffer) {
output->scanout_buffer = output->pending_scanout_buffer;
wl_list_remove(&output->pending_scanout_buffer_destroy_listener.link);
wl_list_insert(output->scanout_buffer->resource.destroy_listener_list.prev,
&output->scanout_buffer_destroy_listener.link);
output->pending_scanout_buffer = NULL;
output->fs_surf_fb_id = output->pending_fs_surf_fb_id;
output->pending_fs_surf_fb_id = 0;
}
msecs = sec * 1000 + usec / 1000;
weston_output_finish_frame(&output->base, msecs);
}
static int
drm_surface_format_supported(struct drm_sprite *s, uint32_t format)
{
int i;
for (i = 0; i < s->count_formats; i++)
if (s->formats[i] == format)
return 1;
return 0;
}
static int
drm_surface_transform_supported(struct weston_surface *es)
{
if (es->transform.enabled)
return 0;
return 1;
}
static int
drm_surface_overlap_supported(struct weston_output *output_base,
pixman_region32_t *overlap)
{
/* We could potentially use a color key here if the surface left
* to display has rectangular regions
*/
if (pixman_region32_not_empty(overlap))
return 0;
return 1;
}
static void
drm_disable_unused_sprites(struct weston_output *output_base)
{
struct weston_compositor *ec = output_base->compositor;
struct drm_compositor *c =(struct drm_compositor *) ec;
struct drm_output *output = (struct drm_output *) output_base;
struct drm_sprite *s;
int ret;
wl_list_for_each(s, &c->sprite_list, link) {
if (s->pending_fb_id)
continue;
ret = drmModeSetPlane(c->drm.fd, s->plane_id,
output->crtc_id, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0);
if (ret)
fprintf(stderr,
"failed to disable plane: %d: %s\n",
ret, strerror(errno));
drmModeRmFB(c->drm.fd, s->fb_id);
s->surface = NULL;
s->pending_surface = NULL;
s->fb_id = 0;
s->pending_fb_id = 0;
}
}
/*
* This function must take care to damage any previously assigned surface
* if the sprite ends up binding to a different surface than in the
* previous frame.
*/
static int
drm_output_prepare_overlay_surface(struct weston_output *output_base,
struct weston_surface *es,
pixman_region32_t *overlap)
{
struct weston_compositor *ec = output_base->compositor;
struct drm_compositor *c =(struct drm_compositor *) ec;
struct drm_sprite *s;
int found = 0;
EGLint handle, stride;
struct gbm_bo *bo;
uint32_t fb_id = 0;
uint32_t handles[4], pitches[4], offsets[4];
int ret = 0;
pixman_region32_t dest_rect, src_rect;
pixman_box32_t *box;
uint32_t format;
if (surface_is_primary(ec, es))
return -1;
if (!es->buffer)
return -1;
if (!drm_surface_transform_supported(es))
return -1;
if (!drm_surface_overlap_supported(output_base, overlap))
return -1;
wl_list_for_each(s, &c->sprite_list, link) {
if (!drm_sprite_crtc_supported(output_base, s->possible_crtcs))
continue;
if (!s->pending_fb_id) {
found = 1;
break;
}
}
/* No sprites available */
if (!found)
return -1;
bo = gbm_bo_create_from_egl_image(c->gbm, c->base.display, es->image,
es->geometry.width, es->geometry.height,
GBM_BO_USE_SCANOUT);
format = gbm_bo_get_format(bo);
handle = gbm_bo_get_handle(bo).s32;
stride = gbm_bo_get_pitch(bo);
gbm_bo_destroy(bo);
if (!drm_surface_format_supported(s, format))
return -1;
if (!handle)
return -1;
handles[0] = handle;
pitches[0] = stride;
offsets[0] = 0;
ret = drmModeAddFB2(c->drm.fd, es->geometry.width, es->geometry.height,
format, handles, pitches, offsets,
&fb_id, 0);
if (ret) {
fprintf(stderr, "addfb2 failed: %d\n", ret);
return -1;
}
if (s->surface && s->surface != es) {
struct weston_surface *old_surf = s->surface;
pixman_region32_fini(&old_surf->damage);
pixman_region32_init_rect(&old_surf->damage,
old_surf->geometry.x, old_surf->geometry.y,
old_surf->geometry.width, old_surf->geometry.height);
}
s->pending_fb_id = fb_id;
s->pending_surface = es;
es->buffer->busy_count++;
/*
* Calculate the source & dest rects properly based on actual
* postion (note the caller has called weston_surface_update_transform()
* for us already).
*/
pixman_region32_init(&dest_rect);
pixman_region32_intersect(&dest_rect, &es->transform.boundingbox,
&output_base->region);
pixman_region32_translate(&dest_rect, -output_base->x, -output_base->y);
box = pixman_region32_extents(&dest_rect);
s->dest_x = box->x1;
s->dest_y = box->y1;
s->dest_w = box->x2 - box->x1;
s->dest_h = box->y2 - box->y1;
pixman_region32_fini(&dest_rect);
pixman_region32_init(&src_rect);
pixman_region32_intersect(&src_rect, &es->transform.boundingbox,
&output_base->region);
pixman_region32_translate(&src_rect, -es->geometry.x, -es->geometry.y);
box = pixman_region32_extents(&src_rect);
s->src_x = box->x1;
s->src_y = box->y1;
s->src_w = box->x2 - box->x1;
s->src_h = box->y2 - box->y1;
pixman_region32_fini(&src_rect);
wl_list_insert(es->buffer->resource.destroy_listener_list.prev,
&s->pending_destroy_listener.link);
return 0;
}
static int
drm_output_set_cursor(struct weston_output *output_base,
struct weston_input_device *eid);
static void
weston_output_set_cursor(struct weston_output *output,
struct weston_input_device *device,
pixman_region32_t *overlap)
{
pixman_region32_t cursor_region;
int prior_was_hardware;
if (device->sprite == NULL)
return;
pixman_region32_init(&cursor_region);
pixman_region32_intersect(&cursor_region,
&device->sprite->transform.boundingbox,
&output->region);
if (!pixman_region32_not_empty(&cursor_region)) {
drm_output_set_cursor(output, NULL);
goto out;
}
prior_was_hardware = device->hw_cursor;
if (pixman_region32_not_empty(overlap) ||
drm_output_set_cursor(output, device) < 0) {
if (prior_was_hardware) {
weston_surface_damage(device->sprite);
drm_output_set_cursor(output, NULL);
}
device->hw_cursor = 0;
} else {
if (!prior_was_hardware)
weston_surface_damage_below(device->sprite);
pixman_region32_fini(&device->sprite->damage);
pixman_region32_init(&device->sprite->damage);
device->hw_cursor = 1;
}
out:
pixman_region32_fini(&cursor_region);
}
static void
drm_assign_planes(struct weston_output *output)
{
struct weston_compositor *ec = output->compositor;
struct weston_surface *es;
pixman_region32_t overlap, surface_overlap;
struct weston_input_device *device;
/*
* 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);
wl_list_for_each(es, &ec->surface_list, link) {
/*
* FIXME: try to assign hw cursors here too, they're just
* special overlays
*/
pixman_region32_init(&surface_overlap);
pixman_region32_intersect(&surface_overlap, &overlap,
&es->transform.boundingbox);
device = (struct weston_input_device *) ec->input_device;
if (es == device->sprite) {
weston_output_set_cursor(output, device,
&surface_overlap);
if (!device->hw_cursor)
pixman_region32_union(&overlap, &overlap,
&es->transform.boundingbox);
} else if (!drm_output_prepare_overlay_surface(output, es,
&surface_overlap)) {
pixman_region32_fini(&es->damage);
pixman_region32_init(&es->damage);
} else {
pixman_region32_union(&overlap, &overlap,
&es->transform.boundingbox);
}
pixman_region32_fini(&surface_overlap);
}
pixman_region32_fini(&overlap);
drm_disable_unused_sprites(output);
}
static int
drm_output_set_cursor(struct weston_output *output_base,
struct weston_input_device *eid)
{
struct drm_output *output = (struct drm_output *) output_base;
struct drm_compositor *c =
(struct drm_compositor *) output->base.compositor;
EGLint handle, stride;
int ret = -1;
struct gbm_bo *bo;
if (eid == NULL) {
drmModeSetCursor(c->drm.fd, output->crtc_id, 0, 0, 0);
return 0;
}
if (eid->sprite->image == EGL_NO_IMAGE_KHR)
goto out;
if (eid->sprite->geometry.width > 64 ||
eid->sprite->geometry.height > 64)
goto out;
bo = gbm_bo_create_from_egl_image(c->gbm,
c->base.display,
eid->sprite->image, 64, 64,
GBM_BO_USE_CURSOR_64X64);
/* Not suitable for hw cursor, fall back */
if (bo == NULL)
goto out;
handle = gbm_bo_get_handle(bo).s32;
stride = gbm_bo_get_pitch(bo);
gbm_bo_destroy(bo);
/* gbm_bo_create_from_egl_image() didn't always validate the usage
* flags, and in that case we might end up with a bad stride. */
if (stride != 64 * 4)
goto out;
ret = drmModeSetCursor(c->drm.fd, output->crtc_id, handle, 64, 64);
if (ret) {
fprintf(stderr, "failed to set cursor: %s\n", strerror(-ret));
goto out;
}
ret = drmModeMoveCursor(c->drm.fd, output->crtc_id,
eid->sprite->geometry.x - output->base.x,
eid->sprite->geometry.y - output->base.y);
if (ret) {
fprintf(stderr, "failed to move cursor: %s\n", strerror(-ret));
goto out;
}
out:
if (ret)
drmModeSetCursor(c->drm.fd, output->crtc_id, 0, 0, 0);
return ret;
}
static void
drm_output_destroy(struct weston_output *output_base)
{
struct drm_output *output = (struct drm_output *) output_base;
struct drm_compositor *c =
(struct drm_compositor *) output->base.compositor;
drmModeCrtcPtr origcrtc = output->original_crtc;
int i;
if (output->backlight)
backlight_destroy(output->backlight);
/* Turn off hardware cursor */
drm_output_set_cursor(&output->base, NULL);
/* Restore original CRTC state */
drmModeSetCrtc(c->drm.fd, origcrtc->crtc_id, origcrtc->buffer_id,
origcrtc->x, origcrtc->y,
&output->connector_id, 1, &origcrtc->mode);
drmModeFreeCrtc(origcrtc);
glFramebufferRenderbuffer(GL_FRAMEBUFFER,
GL_COLOR_ATTACHMENT0,
GL_RENDERBUFFER,
0);
glBindRenderbuffer(GL_RENDERBUFFER, 0);
glDeleteRenderbuffers(2, output->rbo);
/* Destroy output buffers */
for (i = 0; i < 2; i++) {
drmModeRmFB(c->drm.fd, output->fb_id[i]);
c->base.destroy_image(c->base.display, output->image[i]);
gbm_bo_destroy(output->bo[i]);
}
c->crtc_allocator &= ~(1 << output->crtc_id);
c->connector_allocator &= ~(1 << output->connector_id);
weston_output_destroy(&output->base);
wl_list_remove(&output->base.link);
free(output);
}
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_egl(struct drm_compositor *ec, struct udev_device *device)
{
EGLint major, minor;
const char *extensions, *filename;
int fd;
static const EGLint context_attribs[] = {
EGL_CONTEXT_CLIENT_VERSION, 2,
EGL_NONE
};
filename = udev_device_get_devnode(device);
fd = open(filename, O_RDWR | O_CLOEXEC);
if (fd < 0) {
/* Probably permissions error */
fprintf(stderr, "couldn't open %s, skipping\n",
udev_device_get_devnode(device));
return -1;
}
ec->drm.fd = fd;
ec->gbm = gbm_create_device(ec->drm.fd);
ec->base.display = eglGetDisplay(ec->gbm);
if (ec->base.display == NULL) {
fprintf(stderr, "failed to create display\n");
return -1;
}
if (!eglInitialize(ec->base.display, &major, &minor)) {
fprintf(stderr, "failed to initialize display\n");
return -1;
}
extensions = eglQueryString(ec->base.display, EGL_EXTENSIONS);
if (!strstr(extensions, "EGL_KHR_surfaceless_gles2")) {
fprintf(stderr, "EGL_KHR_surfaceless_gles2 not available\n");
return -1;
}
if (!eglBindAPI(EGL_OPENGL_ES_API)) {
fprintf(stderr, "failed to bind api EGL_OPENGL_ES_API\n");
return -1;
}
ec->base.context = eglCreateContext(ec->base.display, NULL,
EGL_NO_CONTEXT, context_attribs);
if (ec->base.context == NULL) {
fprintf(stderr, "failed to create context\n");
return -1;
}
if (!eglMakeCurrent(ec->base.display, EGL_NO_SURFACE,
EGL_NO_SURFACE, ec->base.context)) {
fprintf(stderr, "failed to make context current\n");
return -1;
}
return 0;
}
static drmModeModeInfo builtin_1024x768 = {
63500, /* clock */
1024, 1072, 1176, 1328, 0,
768, 771, 775, 798, 0,
59920,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC,
0,
"1024x768"
};
static int
drm_output_add_mode(struct drm_output *output, drmModeModeInfo *info)
{
struct drm_mode *mode;
mode = malloc(sizeof *mode);
if (mode == NULL)
return -1;
mode->base.flags = 0;
mode->base.width = info->hdisplay;
mode->base.height = info->vdisplay;
mode->base.refresh = info->vrefresh;
mode->mode_info = *info;
wl_list_insert(output->base.mode_list.prev, &mode->base.link);
return 0;
}
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;
}
}
static void
output_handle_scanout_buffer_destroy(struct wl_listener *listener,
struct wl_resource *resource,
uint32_t time)
{
struct drm_output *output =
container_of(listener, struct drm_output,
scanout_buffer_destroy_listener);
output->scanout_buffer = NULL;
if (!output->pending_scanout_buffer)
weston_compositor_schedule_repaint(output->base.compositor);
}
static void
output_handle_pending_scanout_buffer_destroy(struct wl_listener *listener,
struct wl_resource *resource,
uint32_t time)
{
struct drm_output *output =
container_of(listener, struct drm_output,
pending_scanout_buffer_destroy_listener);
output->pending_scanout_buffer = NULL;
weston_compositor_schedule_repaint(output->base.compositor);
}
static void
sprite_handle_buffer_destroy(struct wl_listener *listener,
struct wl_resource *resource,
uint32_t time)
{
struct drm_sprite *sprite =
container_of(listener, struct drm_sprite,
destroy_listener);
sprite->surface = NULL;
}
static void
sprite_handle_pending_buffer_destroy(struct wl_listener *listener,
struct wl_resource *resource,
uint32_t time)
{
struct drm_sprite *sprite =
container_of(listener, struct drm_sprite,
pending_destroy_listener);
sprite->pending_surface = NULL;
}
/* returns a value between 1-10 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 1 to 10 */
norm = 1 + ((brightness) * 9)/(max_brightness);
return (uint32_t) norm;
}
/* values accepted are between 1-10 range */
static void
drm_set_backlight(struct weston_output *output_base, uint32_t value)
{
struct drm_output *output = (struct drm_output *) output_base;
long max_brightness, new_brightness;
if (!output->backlight)
return;
if (value < 1 || value > 10)
return;
max_brightness = backlight_get_max_brightness(output->backlight);
/* get denormalized value */
new_brightness = ((value - 1) * (max_brightness)) / 9;
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 = (struct drm_output *) output_base;
struct weston_compositor *ec = output_base->compositor;
struct drm_compositor *c = (struct drm_compositor *) ec;
drmModeConnectorPtr connector;
drmModePropertyPtr prop;
connector = drmModeGetConnector(c->drm.fd, output->connector_id);
if (!connector)
return;
prop = drm_get_prop(c->drm.fd, connector, "DPMS");
if (!prop) {
drmModeFreeConnector(connector);
return;
}
drmModeConnectorSetProperty(c->drm.fd, connector->connector_id,
prop->prop_id, level);
drmModeFreeProperty(prop);
drmModeFreeConnector(connector);
}
static int
create_output_for_connector(struct drm_compositor *ec,
drmModeRes *resources,
drmModeConnector *connector,
int x, int y, struct udev_device *drm_device)
{
struct drm_output *output;
struct drm_mode *drm_mode, *next;
drmModeEncoder *encoder;
int i, ret;
unsigned handle, stride;
encoder = drmModeGetEncoder(ec->drm.fd, connector->encoders[0]);
if (encoder == NULL) {
fprintf(stderr, "No encoder for connector.\n");
return -1;
}
for (i = 0; i < resources->count_crtcs; i++) {
if (encoder->possible_crtcs & (1 << i) &&
!(ec->crtc_allocator & (1 << resources->crtcs[i])))
break;
}
if (i == resources->count_crtcs) {
fprintf(stderr, "No usable crtc for encoder.\n");
drmModeFreeEncoder(encoder);
return -1;
}
output = malloc(sizeof *output);
if (output == NULL) {
drmModeFreeEncoder(encoder);
return -1;
}
output->fb_id[0] = -1;
output->fb_id[1] = -1;
memset(output, 0, sizeof *output);
output->base.subpixel = drm_subpixel_to_wayland(connector->subpixel);
output->base.make = "unknown";
output->base.model = "unknown";
wl_list_init(&output->base.mode_list);
output->crtc_id = resources->crtcs[i];
ec->crtc_allocator |= (1 << output->crtc_id);
output->connector_id = connector->connector_id;
ec->connector_allocator |= (1 << output->connector_id);
output->original_crtc = drmModeGetCrtc(ec->drm.fd, output->crtc_id);
drmModeFreeEncoder(encoder);
for (i = 0; i < connector->count_modes; i++) {
ret = drm_output_add_mode(output, &connector->modes[i]);
if (ret)
goto err_free;
}
if (connector->count_modes == 0) {
ret = drm_output_add_mode(output, &builtin_1024x768);
if (ret)
goto err_free;
}
drm_mode = container_of(output->base.mode_list.next,
struct drm_mode, base.link);
output->base.current = &drm_mode->base;
drm_mode->base.flags =
WL_OUTPUT_MODE_CURRENT | WL_OUTPUT_MODE_PREFERRED;
glGenRenderbuffers(2, output->rbo);
for (i = 0; i < 2; i++) {
glBindRenderbuffer(GL_RENDERBUFFER, output->rbo[i]);
output->bo[i] =
gbm_bo_create(ec->gbm,
output->base.current->width,
output->base.current->height,
GBM_BO_FORMAT_XRGB8888,
GBM_BO_USE_SCANOUT |
GBM_BO_USE_RENDERING);
if (!output->bo[i])
goto err_bufs;
output->image[i] = ec->base.create_image(ec->base.display,
NULL,
EGL_NATIVE_PIXMAP_KHR,
output->bo[i], NULL);
if (!output->image[i])
goto err_bufs;
ec->base.image_target_renderbuffer_storage(GL_RENDERBUFFER,
output->image[i]);
stride = gbm_bo_get_pitch(output->bo[i]);
handle = gbm_bo_get_handle(output->bo[i]).u32;
ret = drmModeAddFB(ec->drm.fd,
output->base.current->width,
output->base.current->height,
24, 32, stride, handle, &output->fb_id[i]);
if (ret) {
fprintf(stderr, "failed to add fb %d: %m\n", i);
goto err_bufs;
}
}
output->current = 0;
glFramebufferRenderbuffer(GL_FRAMEBUFFER,
GL_COLOR_ATTACHMENT0,
GL_RENDERBUFFER,
output->rbo[output->current]);
ret = drmModeSetCrtc(ec->drm.fd, output->crtc_id,
output->fb_id[output->current ^ 1], 0, 0,
&output->connector_id, 1,
&drm_mode->mode_info);
if (ret) {
fprintf(stderr, "failed to set mode: %m\n");
goto err_fb;
}
output->backlight = backlight_init(drm_device,
connector->connector_type);
if (output->backlight) {
output->base.set_backlight = drm_set_backlight;
output->base.backlight_current = drm_get_backlight(output);
}
weston_output_init(&output->base, &ec->base, x, y,
connector->mmWidth, connector->mmHeight, 0);
wl_list_insert(ec->base.output_list.prev, &output->base.link);
output->scanout_buffer_destroy_listener.func =
output_handle_scanout_buffer_destroy;
output->pending_scanout_buffer_destroy_listener.func =
output_handle_pending_scanout_buffer_destroy;
output->pending_fs_surf_fb_id = 0;
output->base.repaint = drm_output_repaint;
output->base.destroy = drm_output_destroy;
output->base.assign_planes = drm_assign_planes;
output->base.set_dpms = drm_set_dpms;
return 0;
err_fb:
glFramebufferRenderbuffer(GL_FRAMEBUFFER,
GL_COLOR_ATTACHMENT0,
GL_RENDERBUFFER,
0);
err_bufs:
for (i = 0; i < 2; i++) {
if (output->fb_id[i] != -1)
drmModeRmFB(ec->drm.fd, output->fb_id[i]);
if (output->image[i])
ec->base.destroy_image(ec->base.display,
output->image[i]);
if (output->bo[i])
gbm_bo_destroy(output->bo[i]);
}
glBindRenderbuffer(GL_RENDERBUFFER, 0);
glDeleteRenderbuffers(2, output->rbo);
err_free:
wl_list_for_each_safe(drm_mode, next, &output->base.mode_list,
base.link) {
wl_list_remove(&drm_mode->base.link);
free(drm_mode);
}
drmModeFreeCrtc(output->original_crtc);
ec->crtc_allocator &= ~(1 << output->crtc_id);
ec->connector_allocator &= ~(1 << output->connector_id);
free(output);
return -1;
}
static void
create_sprites(struct drm_compositor *ec)
{
struct drm_sprite *sprite;
drmModePlaneRes *plane_res;
drmModePlane *plane;
int i;
plane_res = drmModeGetPlaneResources(ec->drm.fd);
if (!plane_res) {
fprintf(stderr, "failed to get plane resources: %s\n",
strerror(errno));
return;
}
for (i = 0; i < plane_res->count_planes; i++) {
plane = drmModeGetPlane(ec->drm.fd, plane_res->planes[i]);
if (!plane)
continue;
sprite = malloc(sizeof(*sprite) + ((sizeof(uint32_t)) *
plane->count_formats));
if (!sprite) {
fprintf(stderr, "%s: out of memory\n",
__func__);
free(plane);
continue;
}
memset(sprite, 0, sizeof *sprite);
sprite->possible_crtcs = plane->possible_crtcs;
sprite->plane_id = plane->plane_id;
sprite->surface = NULL;
sprite->pending_surface = NULL;
sprite->fb_id = 0;
sprite->pending_fb_id = 0;
sprite->destroy_listener.func = sprite_handle_buffer_destroy;
sprite->pending_destroy_listener.func =
sprite_handle_pending_buffer_destroy;
sprite->compositor = ec;
sprite->count_formats = plane->count_formats;
memcpy(sprite->formats, plane->formats,
plane->count_formats);
drmModeFreePlane(plane);
wl_list_insert(&ec->sprite_list, &sprite->link);
}
free(plane_res->planes);
free(plane_res);
}
static void
destroy_sprites(struct drm_compositor *compositor)
{
struct drm_sprite *sprite, *next;
struct drm_output *output;
output = container_of(compositor->base.output_list.next,
struct drm_output, base.link);
wl_list_for_each_safe(sprite, next, &compositor->sprite_list, link) {
drmModeSetPlane(compositor->drm.fd,
sprite->plane_id,
output->crtc_id, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0);
drmModeRmFB(compositor->drm.fd, sprite->fb_id);
free(sprite);
}
}
static int
create_outputs(struct drm_compositor *ec, int option_connector,
struct udev_device *drm_device)
{
drmModeConnector *connector;
drmModeRes *resources;
int i;
int x = 0, y = 0;
resources = drmModeGetResources(ec->drm.fd);
if (!resources) {
fprintf(stderr, "drmModeGetResources failed\n");
return -1;
}
ec->crtcs = calloc(resources->count_crtcs, sizeof(uint32_t));
if (!ec->crtcs)
return -1;
ec->num_crtcs = resources->count_crtcs;
memcpy(ec->crtcs, resources->crtcs, sizeof(uint32_t) * ec->num_crtcs);
for (i = 0; i < resources->count_connectors; i++) {
connector = drmModeGetConnector(ec->drm.fd,
resources->connectors[i]);
if (connector == NULL)
continue;
if (connector->connection == DRM_MODE_CONNECTED &&
(option_connector == 0 ||
connector->connector_id == option_connector)) {
if (create_output_for_connector(ec, resources,
connector, x, y,
drm_device) < 0) {
drmModeFreeConnector(connector);
continue;
}
x += container_of(ec->base.output_list.prev,
struct weston_output,
link)->current->width;
}
drmModeFreeConnector(connector);
}
if (wl_list_empty(&ec->base.output_list)) {
fprintf(stderr, "No currently active connector found.\n");
return -1;
}
drmModeFreeResources(resources);
return 0;
}
static void
update_outputs(struct drm_compositor *ec, struct udev_device *drm_device)
{
drmModeConnector *connector;
drmModeRes *resources;
struct drm_output *output, *next;
int x = 0, y = 0;
int x_offset = 0, y_offset = 0;
uint32_t connected = 0, disconnects = 0;
int i;
resources = drmModeGetResources(ec->drm.fd);
if (!resources) {
fprintf(stderr, "drmModeGetResources failed\n");
return;
}
/* collect new connects */
for (i = 0; i < resources->count_connectors; i++) {
int connector_id = resources->connectors[i];
connector = drmModeGetConnector(ec->drm.fd, connector_id);
if (connector == NULL)
continue;
if (connector->connection != DRM_MODE_CONNECTED) {
drmModeFreeConnector(connector);
continue;
}
connected |= (1 << connector_id);
if (!(ec->connector_allocator & (1 << connector_id))) {
struct weston_output *last =
container_of(ec->base.output_list.prev,
struct weston_output, link);
/* XXX: not yet needed, we die with 0 outputs */
if (!wl_list_empty(&ec->base.output_list))
x = last->x + last->current->width;
else
x = 0;
y = 0;
create_output_for_connector(ec, resources,
connector, x, y,
drm_device);
printf("connector %d connected\n", connector_id);
}
drmModeFreeConnector(connector);
}
drmModeFreeResources(resources);
disconnects = ec->connector_allocator & ~connected;
if (disconnects) {
wl_list_for_each_safe(output, next, &ec->base.output_list,
base.link) {
if (x_offset != 0 || y_offset != 0) {
weston_output_move(&output->base,
output->base.x - x_offset,
output->base.y - y_offset);
}
if (disconnects & (1 << output->connector_id)) {
disconnects &= ~(1 << output->connector_id);
printf("connector %d disconnected\n",
output->connector_id);
x_offset += output->base.current->width;
drm_output_destroy(&output->base);
}
}
}
/* FIXME: handle zero outputs, without terminating */
if (ec->connector_allocator == 0)
wl_display_terminate(ec->base.wl_display);
}
static int
udev_event_is_hotplug(struct udev_device *device)
{
struct udev_list_entry *list, *hotplug_entry;
list = udev_device_get_properties_list_entry(device);
hotplug_entry = udev_list_entry_get_by_name(list, "HOTPLUG");
if (hotplug_entry == NULL)
return 0;
return strcmp(udev_list_entry_get_value(hotplug_entry), "1") == 0;
}
static int
udev_drm_event(int fd, uint32_t mask, void *data)
{
struct drm_compositor *ec = data;
struct udev_device *event;
event = udev_monitor_receive_device(ec->udev_monitor);
if (udev_event_is_hotplug(event))
update_outputs(ec, event);
udev_device_unref(event);
return 1;
}
static void
drm_destroy(struct weston_compositor *ec)
{
struct drm_compositor *d = (struct drm_compositor *) ec;
struct weston_input_device *input, *next;
weston_compositor_shutdown(ec);
gbm_device_destroy(d->gbm);
destroy_sprites(d);
drmDropMaster(d->drm.fd);
tty_destroy(d->tty);
wl_list_for_each_safe(input, next, &ec->input_device_list, link)
evdev_input_destroy(input);
free(d);
}
static void
drm_compositor_set_modes(struct drm_compositor *compositor)
{
struct drm_output *output;
struct drm_mode *drm_mode;
int ret;
wl_list_for_each(output, &compositor->base.output_list, base.link) {
drm_mode = (struct drm_mode *) output->base.current;
ret = drmModeSetCrtc(compositor->drm.fd, output->crtc_id,
output->fb_id[output->current ^ 1], 0, 0,
&output->connector_id, 1,
&drm_mode->mode_info);
if (ret < 0) {
fprintf(stderr,
"failed to set mode %dx%d for output at %d,%d: %m",
drm_mode->base.width, drm_mode->base.height,
output->base.x, output->base.y);
}
}
}
static void
vt_func(struct weston_compositor *compositor, int event)
{
struct drm_compositor *ec = (struct drm_compositor *) compositor;
struct weston_output *output;
struct weston_input_device *input;
struct drm_sprite *sprite;
struct drm_output *drm_output;
switch (event) {
case TTY_ENTER_VT:
compositor->focus = 1;
if (drmSetMaster(ec->drm.fd)) {
fprintf(stderr, "failed to set master: %m\n");
wl_display_terminate(compositor->wl_display);
}
compositor->state = ec->prev_state;
drm_compositor_set_modes(ec);
weston_compositor_damage_all(compositor);
wl_list_for_each(input, &compositor->input_device_list, link)
evdev_add_devices(ec->udev, input);
break;
case TTY_LEAVE_VT:
compositor->focus = 0;
ec->prev_state = compositor->state;
compositor->state = WESTON_COMPOSITOR_SLEEPING;
/* 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 SLEEPING state will prevent
* further attemps at repainting. When we switch
* back, we schedule a repaint, which will process
* pending frame callbacks. */
wl_list_for_each(output, &ec->base.output_list, link) {
output->repaint_needed = 0;
drm_output_set_cursor(output, NULL);
}
drm_output = container_of(ec->base.output_list.next,
struct drm_output, base.link);
wl_list_for_each(sprite, &ec->sprite_list, link)
drmModeSetPlane(ec->drm.fd,
sprite->plane_id,
drm_output->crtc_id, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0);
wl_list_for_each(input, &compositor->input_device_list, link)
evdev_remove_devices(input);
if (drmDropMaster(ec->drm.fd) < 0)
fprintf(stderr, "failed to drop master: %m\n");
break;
};
}
static const char default_seat[] = "seat0";
static struct weston_compositor *
drm_compositor_create(struct wl_display *display,
int connector, const char *seat, int tty)
{
struct drm_compositor *ec;
struct udev_enumerate *e;
struct udev_list_entry *entry;
struct udev_device *device, *drm_device;
const char *path, *device_seat;
struct wl_event_loop *loop;
ec = malloc(sizeof *ec);
if (ec == NULL)
return NULL;
memset(ec, 0, sizeof *ec);
ec->udev = udev_new();
if (ec->udev == NULL) {
fprintf(stderr, "failed to initialize udev context\n");
return NULL;
}
ec->base.wl_display = display;
ec->tty = tty_create(&ec->base, vt_func, tty);
if (!ec->tty) {
fprintf(stderr, "failed to initialize tty\n");
free(ec);
return NULL;
}
e = udev_enumerate_new(ec->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)) {
path = udev_list_entry_get_name(entry);
device = udev_device_new_from_syspath(ec->udev, path);
device_seat =
udev_device_get_property_value(device, "ID_SEAT");
if (!device_seat)
device_seat = default_seat;
if (strcmp(device_seat, seat) == 0) {
drm_device = device;
break;
}
udev_device_unref(device);
}
if (drm_device == NULL) {
fprintf(stderr, "no drm device found\n");
return NULL;
}
if (init_egl(ec, drm_device) < 0) {
fprintf(stderr, "failed to initialize egl\n");
return NULL;
}
ec->base.destroy = drm_destroy;
ec->base.focus = 1;
ec->prev_state = WESTON_COMPOSITOR_ACTIVE;
glGenFramebuffers(1, &ec->base.fbo);
glBindFramebuffer(GL_FRAMEBUFFER, ec->base.fbo);
/* Can't init base class until we have a current egl context */
if (weston_compositor_init(&ec->base, display) < 0)
return NULL;
wl_list_init(&ec->sprite_list);
create_sprites(ec);
if (create_outputs(ec, connector, drm_device) < 0) {
fprintf(stderr, "failed to create output for %s\n", path);
return NULL;
}
udev_device_unref(drm_device);
udev_enumerate_unref(e);
path = NULL;
evdev_input_create(&ec->base, ec->udev, seat);
loop = wl_display_get_event_loop(ec->base.wl_display);
ec->drm_source =
wl_event_loop_add_fd(loop, ec->drm.fd,
WL_EVENT_READABLE, on_drm_input, ec);
ec->udev_monitor = udev_monitor_new_from_netlink(ec->udev, "udev");
if (ec->udev_monitor == NULL) {
fprintf(stderr, "failed to intialize udev monitor\n");
return NULL;
}
udev_monitor_filter_add_match_subsystem_devtype(ec->udev_monitor,
"drm", NULL);
ec->udev_drm_source =
wl_event_loop_add_fd(loop,
udev_monitor_get_fd(ec->udev_monitor),
WL_EVENT_READABLE, udev_drm_event, ec);
if (udev_monitor_enable_receiving(ec->udev_monitor) < 0) {
fprintf(stderr, "failed to enable udev-monitor receiving\n");
return NULL;
}
return &ec->base;
}
struct weston_compositor *
backend_init(struct wl_display *display, char *options);
WL_EXPORT struct weston_compositor *
backend_init(struct wl_display *display, char *options)
{
int connector = 0, i;
const char *seat;
char *p, *value;
int tty = 0;
static char * const tokens[] = { "connector", "seat", "tty", NULL };
p = options;
seat = default_seat;
while (i = getsubopt(&p, tokens, &value), i != -1) {
switch (i) {
case 0:
connector = strtol(value, NULL, 0);
break;
case 1:
seat = value;
break;
case 2:
tty = strtol(value, NULL, 0);
break;
}
}
return drm_compositor_create(display, connector, seat, tty);
}
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