egl/wayland-drm: Only announce formats via wl_drm which the driver supports.

Check if a pixel format is supported by the Wayland servers gpu driver
before exposing it to the client via wl_drm, so we avoid reporting formats
to the client which the server gpu can't handle.

Restrict this reporting to the new color depth 30 formats for now, as the
ARGB/XRGB8888 and RGB565 formats are probably supported by every gpu under
the sun.

Atm. this is mostly useful to allow proper PRIME renderoffload for depth
30 formats on the typical Intel iGPU + NVidia dGPU "NVidia Optimus" laptop
combo.

Tested on Intel, AMD, NVidia with single-gpu setup and on a Intel + NVidia
Optimus setup.

Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
(cherry picked from commit 820dfcea43)

src/egl/drivers/dri2/egl_dri2.c

@@ -2819,7 +2819,8 @@ dri2_bind_wayland_display_wl(_EGLDriver *drv, _EGLDisplay *disp,
    const struct wayland_drm_callbacks wl_drm_callbacks = {
       .authenticate = (int(*)(void *, uint32_t)) dri2_dpy->vtbl->authenticate,
       .reference_buffer = dri2_wl_reference_buffer,
-      .release_buffer = dri2_wl_release_buffer
+      .release_buffer = dri2_wl_release_buffer,
+      .is_format_supported = dri2_wl_is_format_supported
    };
    int flags = 0;
    uint64_t cap;

src/egl/drivers/dri2/egl_dri2.h

@@ -457,6 +457,8 @@ EGLBoolean
 dri2_initialize_wayland(_EGLDriver *drv, _EGLDisplay *disp);
 void
 dri2_teardown_wayland(struct dri2_egl_display *dri2_dpy);
+bool
+dri2_wl_is_format_supported(void* user_data, uint32_t format);
 #else
 static inline EGLBoolean
 dri2_initialize_wayland(_EGLDriver *drv, _EGLDisplay *disp)

src/egl/drivers/dri2/platform_wayland.c

@@ -174,6 +174,24 @@ dri2_wl_visual_idx_from_shm_format(uint32_t shm_format)
    return -1;
 }
 
+bool
+dri2_wl_is_format_supported(void* user_data, uint32_t format)
+{
+   _EGLDisplay *disp = (_EGLDisplay *) user_data;
+   struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
+   int j = dri2_wl_visual_idx_from_fourcc(format);
+
+   if (j == -1)
+      return false;
+
+   for (int i = 0; dri2_dpy->driver_configs[i]; i++)
+      if (j == dri2_wl_visual_idx_from_config(dri2_dpy,
+                                              dri2_dpy->driver_configs[i]))
+         return true;
+
+   return false;
+}
+
 static int
 roundtrip(struct dri2_egl_display *dri2_dpy)
 {

src/egl/wayland/wayland-drm/wayland-drm.c

@@ -111,6 +111,8 @@ drm_create_buffer(struct wl_client *client, struct wl_resource *resource,
 		  uint32_t stride, uint32_t format)
 {
         switch (format) {
+        case WL_DRM_FORMAT_ABGR2101010:
+        case WL_DRM_FORMAT_XBGR2101010:
         case WL_DRM_FORMAT_ARGB2101010:
         case WL_DRM_FORMAT_XRGB2101010:
         case WL_DRM_FORMAT_ARGB8888:
@@ -210,10 +212,31 @@ bind_drm(struct wl_client *client, void *data, uint32_t version, uint32_t id)
 	wl_resource_set_implementation(resource, &drm_interface, data, NULL);
 
 	wl_resource_post_event(resource, WL_DRM_DEVICE, drm->device_name);
-	wl_resource_post_event(resource, WL_DRM_FORMAT,
-			       WL_DRM_FORMAT_ARGB2101010);
-	wl_resource_post_event(resource, WL_DRM_FORMAT,
-			       WL_DRM_FORMAT_XRGB2101010);
+
+	if (drm->callbacks.is_format_supported(drm->user_data,
+					       WL_DRM_FORMAT_ARGB2101010)) {
+		wl_resource_post_event(resource, WL_DRM_FORMAT,
+				       WL_DRM_FORMAT_ARGB2101010);
+	}
+
+	if (drm->callbacks.is_format_supported(drm->user_data,
+					       WL_DRM_FORMAT_XRGB2101010)) {
+		wl_resource_post_event(resource, WL_DRM_FORMAT,
+				       WL_DRM_FORMAT_XRGB2101010);
+	}
+
+	if (drm->callbacks.is_format_supported(drm->user_data,
+					       WL_DRM_FORMAT_ABGR2101010)) {
+		wl_resource_post_event(resource, WL_DRM_FORMAT,
+				       WL_DRM_FORMAT_ABGR2101010);
+	}
+
+	if (drm->callbacks.is_format_supported(drm->user_data,
+					       WL_DRM_FORMAT_XBGR2101010)) {
+		wl_resource_post_event(resource, WL_DRM_FORMAT,
+				       WL_DRM_FORMAT_XBGR2101010);
+	}
+
 	wl_resource_post_event(resource, WL_DRM_FORMAT,
 			       WL_DRM_FORMAT_ARGB8888);
 	wl_resource_post_event(resource, WL_DRM_FORMAT,

src/egl/wayland/wayland-drm/wayland-drm.h

@@ -14,6 +14,8 @@ struct wayland_drm_callbacks {
                                  struct wl_drm_buffer *buffer);
 
 	void (*release_buffer)(void *user_data, struct wl_drm_buffer *buffer);
+
+	bool (*is_format_supported)(void *user_data, uint32_t format);
 };