backend-drm: make dma-buf feedback device specific

The scanout format for the dma-buf feedback are specific to the kms device that
is used for scanout. Therefore, we have to pass the device of the output when
retrieving the scanout formats.

Signed-off-by: Michael Tretter <m.tretter@pengutronix.de>

libweston/backend-drm/drm.c

@@ -1711,10 +1711,9 @@ drm_output_deinit_planes(struct drm_output *output)
 }
 
 static struct weston_drm_format_array *
-get_scanout_formats(struct drm_backend *b)
+get_scanout_formats(struct drm_device *device)
 {
-	struct weston_compositor *ec = b->compositor;
-	struct drm_device *device = b->drm;
+	struct weston_compositor *ec = device->backend->compositor;
 	const struct weston_drm_format_array *renderer_formats;
 	struct weston_drm_format_array *scanout_formats, union_planes_formats;
 	struct drm_plane *plane;
@@ -3240,7 +3239,7 @@ drm_backend_create(struct weston_compositor *compositor,
 			 * table was already created and populated with
 			 * renderer's format/modifier pairs. So now we must
 			 * compute the scanout formats indices in the table */
-			scanout_formats = get_scanout_formats(b);
+			scanout_formats = get_scanout_formats(b->drm);
 			if (!scanout_formats)
 				goto err_udev_monitor;
 			ret = weston_dmabuf_feedback_format_table_set_scanout_indices(compositor->dmabuf_feedback_format_table,

libweston/backend-drm/state-propose.c

@@ -326,12 +326,12 @@ drm_output_check_zpos_plane_states(struct drm_output_state *state)
 }
 
 static bool
-dmabuf_feedback_maybe_update(struct drm_backend *b, struct weston_view *ev,
+dmabuf_feedback_maybe_update(struct drm_device *device, struct weston_view *ev,
 			     uint32_t try_view_on_plane_failure_reasons)
 {
 	struct weston_dmabuf_feedback *dmabuf_feedback = ev->surface->dmabuf_feedback;
 	struct weston_dmabuf_feedback_tranche *scanout_tranche;
-	struct drm_device *device = b->drm;
+	struct drm_backend *b = device->backend;
 	dev_t scanout_dev = device->drm.devnum;
 	uint32_t scanout_flags = ZWP_LINUX_DMABUF_FEEDBACK_V1_TRANCHE_FLAGS_SCANOUT;
 	uint32_t action_needed = ACTION_NEEDED_NONE;
@@ -971,7 +971,7 @@ drm_assign_planes(struct weston_output *output_base)
 
 		/* Update dmabuf-feedback if needed */
 		if (ev->surface->dmabuf_feedback)
-			dmabuf_feedback_maybe_update(b, ev,
+			dmabuf_feedback_maybe_update(device, ev,
 						     pnode->try_view_on_plane_failure_reasons);
 		pnode->try_view_on_plane_failure_reasons = FAILURE_REASONS_NONE;