drm: Pretty print pixel format in drm_fb_get_bpp_depth() and format_check()

drm_fb_get_bpp_depth() likes to complain about unsupported pixel formats
but doesn't bother telling us what the format was. Also format_check()
just returns an error when it encouters an invalid format, leaving the
user scratching his head trying to figure out why addfb failed. Make
life a bit easier by using drm_get_format_name() in both places.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index b6a8f7ffb47f..d6cf77c472e7 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -2489,6 +2489,8 @@ static int format_check(const struct drm_mode_fb_cmd2 *r)
         case DRM_FORMAT_YVU444:
                 return 0;
         default:
+                DRM_DEBUG_KMS("invalid pixel format %s\n",
+                              drm_get_format_name(r->pixel_format));
                 return -EINVAL;
         }
 }
@@ -3828,7 +3830,8 @@ void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth,
                 *bpp = 32;
                 break;
         default:
-                DRM_DEBUG_KMS("unsupported pixel format\n");
+                DRM_DEBUG_KMS("unsupported pixel format %s\n",
+                              drm_get_format_name(format));
                 *depth = 0;
                 *bpp = 0;
                 break;