[PATCH] drm: Force a full mode set if the frame buffer depth changes.

[Chris Wilson]

As the crtc will need to be reconfigured if the framebuffer depth
changes, we need to check for such a change during set_config().

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/drm_crtc_helper.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c
index 11fe9c8..1ccd77f 100644
--- a/drivers/gpu/drm/drm_crtc_helper.c
+++ b/drivers/gpu/drm/drm_crtc_helper.c
@@ -543,6 +543,9 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set)
 			mode_changed = true;
 		} else if (set->fb == NULL) {
 			mode_changed = true;
+		} else if (set->fb->depth != set->crtc->fb->depth) {
+			DRM_DEBUG_KMS("crtc is changing fb depth, full mode set\n");
+			mode_changed = true;
 		} else
 			fb_changed = true;
 	}
-- 
1.7.1