[Mesa-dev] [PATCH 5/9] egl/wayland: Implement DRI_PRIME support
Axel Davy
axel.davy at ens.fr
Sat May 2 03:15:53 PDT 2015
When the server gpu and requested gpu are different:
. They likely don't support the same tiling modes
. They likely do not have fast access to the same locations
Thus we do:
. render to a tiled buffer we do not share with the server
. Copy the content at every swap to a buffer with no tiling
that we share with the server.
This is similar to the glx dri3 DRI_PRIME implementation.
Signed-off-by: Axel Davy <axel.davy at ens.fr>
---
src/egl/drivers/dri2/egl_dri2.h | 3 +
src/egl/drivers/dri2/platform_wayland.c | 105 +++++++++++++++++++++++++++-----
2 files changed, 93 insertions(+), 15 deletions(-)
diff --git a/src/egl/drivers/dri2/egl_dri2.h b/src/egl/drivers/dri2/egl_dri2.h
index afa4356..89fc308 100644
--- a/src/egl/drivers/dri2/egl_dri2.h
+++ b/src/egl/drivers/dri2/egl_dri2.h
@@ -199,6 +199,7 @@ struct dri2_egl_display
int formats;
uint32_t capabilities;
int is_render_node;
+ int is_different_gpu;
#endif
};
@@ -252,6 +253,8 @@ struct dri2_egl_surface
#ifdef HAVE_WAYLAND_PLATFORM
struct wl_buffer *wl_buffer;
__DRIimage *dri_image;
+ /* for is_different_gpu case. NULL else */
+ __DRIimage *linear_copy;
#endif
#ifdef HAVE_DRM_PLATFORM
struct gbm_bo *bo;
diff --git a/src/egl/drivers/dri2/platform_wayland.c b/src/egl/drivers/dri2/platform_wayland.c
index 79989cb..84482da 100644
--- a/src/egl/drivers/dri2/platform_wayland.c
+++ b/src/egl/drivers/dri2/platform_wayland.c
@@ -240,6 +240,8 @@ dri2_wl_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
wl_buffer_destroy(dri2_surf->color_buffers[i].wl_buffer);
if (dri2_surf->color_buffers[i].dri_image)
dri2_dpy->image->destroyImage(dri2_surf->color_buffers[i].dri_image);
+ if (dri2_surf->color_buffers[i].linear_copy)
+ dri2_dpy->image->destroyImage(dri2_surf->color_buffers[i].linear_copy);
}
for (i = 0; i < __DRI_BUFFER_COUNT; i++)
@@ -274,9 +276,12 @@ dri2_wl_release_buffers(struct dri2_egl_surface *dri2_surf)
wl_buffer_destroy(dri2_surf->color_buffers[i].wl_buffer);
if (dri2_surf->color_buffers[i].dri_image)
dri2_dpy->image->destroyImage(dri2_surf->color_buffers[i].dri_image);
+ if (dri2_surf->color_buffers[i].linear_copy)
+ dri2_dpy->image->destroyImage(dri2_surf->color_buffers[i].linear_copy);
dri2_surf->color_buffers[i].wl_buffer = NULL;
dri2_surf->color_buffers[i].dri_image = NULL;
+ dri2_surf->color_buffers[i].linear_copy = NULL;
dri2_surf->color_buffers[i].locked = 0;
}
@@ -338,13 +343,29 @@ get_back_bo(struct dri2_egl_surface *dri2_surf)
if (dri2_surf->back == NULL)
return -1;
+
+ if (dri2_dpy->is_different_gpu &&
+ dri2_surf->back->linear_copy == NULL) {
+ dri2_surf->back->linear_copy =
+ dri2_dpy->image->createImage(dri2_dpy->dri_screen,
+ dri2_surf->base.Width,
+ dri2_surf->base.Height,
+ dri_image_format,
+ __DRI_IMAGE_USE_SHARE |
+ __DRI_IMAGE_USE_LINEAR,
+ NULL);
+ if (dri2_surf->back->linear_copy == NULL)
+ return -1;
+ }
+
if (dri2_surf->back->dri_image == NULL) {
dri2_surf->back->dri_image =
dri2_dpy->image->createImage(dri2_dpy->dri_screen,
dri2_surf->base.Width,
dri2_surf->base.Height,
dri_image_format,
- __DRI_IMAGE_USE_SHARE,
+ dri2_dpy->is_different_gpu ?
+ 0 : __DRI_IMAGE_USE_SHARE,
NULL);
dri2_surf->back->age = 0;
}
@@ -432,8 +453,11 @@ update_buffers(struct dri2_egl_surface *dri2_surf)
dri2_surf->color_buffers[i].wl_buffer) {
wl_buffer_destroy(dri2_surf->color_buffers[i].wl_buffer);
dri2_dpy->image->destroyImage(dri2_surf->color_buffers[i].dri_image);
+ if (dri2_dpy->is_different_gpu)
+ dri2_dpy->image->destroyImage(dri2_surf->color_buffers[i].linear_copy);
dri2_surf->color_buffers[i].wl_buffer = NULL;
dri2_surf->color_buffers[i].dri_image = NULL;
+ dri2_surf->color_buffers[i].linear_copy = NULL;
}
}
@@ -578,16 +602,20 @@ create_wl_buffer(struct dri2_egl_surface *dri2_surf)
{
struct dri2_egl_display *dri2_dpy =
dri2_egl_display(dri2_surf->base.Resource.Display);
+ __DRIimage *image;
int fd, stride, name;
if (dri2_surf->current->wl_buffer != NULL)
return;
+ if (dri2_dpy->is_different_gpu) {
+ image = dri2_surf->current->linear_copy;
+ } else {
+ image = dri2_surf->current->dri_image;
+ }
if (dri2_dpy->capabilities & WL_DRM_CAPABILITY_PRIME) {
- dri2_dpy->image->queryImage(dri2_surf->current->dri_image,
- __DRI_IMAGE_ATTRIB_FD, &fd);
- dri2_dpy->image->queryImage(dri2_surf->current->dri_image,
- __DRI_IMAGE_ATTRIB_STRIDE, &stride);
+ dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_FD, &fd);
+ dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_STRIDE, &stride);
dri2_surf->current->wl_buffer =
wl_drm_create_prime_buffer(dri2_dpy->wl_drm,
@@ -600,10 +628,8 @@ create_wl_buffer(struct dri2_egl_surface *dri2_surf)
0, 0);
close(fd);
} else {
- dri2_dpy->image->queryImage(dri2_surf->current->dri_image,
- __DRI_IMAGE_ATTRIB_NAME, &name);
- dri2_dpy->image->queryImage(dri2_surf->current->dri_image,
- __DRI_IMAGE_ATTRIB_STRIDE, &stride);
+ dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_NAME, &name);
+ dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_STRIDE, &stride);
dri2_surf->current->wl_buffer =
wl_drm_create_buffer(dri2_dpy->wl_drm,
@@ -632,6 +658,8 @@ dri2_wl_swap_buffers_with_damage(_EGLDriver *drv,
{
struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
+ struct dri2_egl_context *dri2_ctx;
+ _EGLContext *ctx;
int i;
for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++)
@@ -683,6 +711,18 @@ dri2_wl_swap_buffers_with_damage(_EGLDriver *drv,
}
}
+ if (dri2_dpy->is_different_gpu) {
+ ctx = _eglGetCurrentContext();
+ dri2_ctx = dri2_egl_context(ctx);
+ dri2_dpy->image->blitImage(dri2_ctx->dri_context,
+ dri2_surf->current->linear_copy,
+ dri2_surf->current->dri_image,
+ 0, 0, dri2_surf->base.Width,
+ dri2_surf->base.Height,
+ 0, 0, dri2_surf->base.Width,
+ dri2_surf->base.Height, 0);
+ }
+
dri2_flush_drawable_for_swapbuffers(disp, draw);
(*dri2_dpy->flush->invalidate)(dri2_surf->dri_drawable);
@@ -869,7 +909,6 @@ drm_handle_device(void *data, struct wl_drm *drm, const char *device)
}
if (is_fd_render_node(dri2_dpy->fd)) {
- dri2_dpy->is_render_node = 1;
dri2_dpy->authenticated = 1;
} else {
drmGetMagic(dri2_dpy->fd, &magic);
@@ -1084,6 +1123,24 @@ dri2_initialize_wayland(_EGLDriver *drv, _EGLDisplay *disp)
if (roundtrip(dri2_dpy) < 0 || !dri2_dpy->authenticated)
goto cleanup_fd;
+ dri2_dpy->fd = loader_get_user_preferred_fd(dri2_dpy->fd,
+ &dri2_dpy->is_different_gpu);
+ if (dri2_dpy->is_different_gpu) {
+ free(dri2_dpy->device_name);
+ dri2_dpy->device_name = loader_get_device_name_for_fd(dri2_dpy->fd);
+ if (!dri2_dpy->device_name) {
+ _eglError(EGL_BAD_ALLOC, "wayland-egl: failed to get device name "
+ "for requested GPU");
+ goto cleanup_fd;
+ }
+ }
+
+ /* we have to do the check now, because loader_get_user_preferred_fd
+ * will return a render-node when the requested gpu is different
+ * to the server, but also if the client asks for the same gpu than
+ * the server by requesting its pci-id */
+ dri2_dpy->is_render_node = is_fd_render_node(dri2_dpy->fd);
+
dri2_dpy->driver_name = loader_get_driver_for_fd(dri2_dpy->fd, 0);
if (dri2_dpy->driver_name == NULL) {
_eglError(EGL_BAD_ALLOC, "DRI2: failed to get driver name");
@@ -1113,10 +1170,10 @@ dri2_initialize_wayland(_EGLDriver *drv, _EGLDisplay *disp)
dri2_wl_setup_swap_interval(dri2_dpy);
- /* The server shouldn't advertise WL_DRM_CAPABILITY_PRIME if the driver
- * doesn't have createImageFromFds, since we're using the same driver on
- * both sides. We don't want crash if that happens anyway, so fall back to
- * gem names if we don't have prime support. */
+ /* To use Prime, we must have _DRI_IMAGE v7 at least.
+ * createImageFromFds support indicates that Prime export/import
+ * is supported by the driver. Fall back to
+ * gem names if we don't have Prime support. */
if (dri2_dpy->image->base.version < 7 ||
dri2_dpy->image->createImageFromFds == NULL)
@@ -1127,6 +1184,15 @@ dri2_initialize_wayland(_EGLDriver *drv, _EGLDisplay *disp)
goto cleanup_screen;
}
+ if (dri2_dpy->is_different_gpu &&
+ (dri2_dpy->image->base.version < 9 ||
+ dri2_dpy->image->blitImage == NULL)) {
+ _eglLog(_EGL_WARNING, "wayland-egl: Different GPU, but image extension "
+ "version 9 or later not found, or blitImage not "
+ "implemented for this driver");
+ goto cleanup_screen;
+ }
+
types = EGL_WINDOW_BIT;
for (i = 0; dri2_dpy->driver_configs[i]; i++) {
config = dri2_dpy->driver_configs[i];
@@ -1139,7 +1205,16 @@ dri2_initialize_wayland(_EGLDriver *drv, _EGLDisplay *disp)
}
disp->Extensions.WL_bind_wayland_display = EGL_TRUE;
- disp->Extensions.WL_create_wayland_buffer_from_image = EGL_TRUE;
+ /* When cannot convert EGLImage to wl_buffer when on a different gpu,
+ * because the buffer of the EGLImage has likely a tiling mode the server
+ * gpu won't support. These is no way to check for now. Thus do not support the
+ * extension */
+ if (!dri2_dpy->is_different_gpu) {
+ disp->Extensions.WL_create_wayland_buffer_from_image = EGL_TRUE;
+ } else {
+ dri2_wl_display_vtbl.create_wayland_buffer_from_image =
+ dri2_fallback_create_wayland_buffer_from_image;
+ }
disp->Extensions.EXT_buffer_age = EGL_TRUE;
disp->Extensions.EXT_swap_buffers_with_damage = EGL_TRUE;
--
2.3.7
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