drm/amd/display: Add assert that chroma pitch is non zero

Signed-off-by: Julian Parkin <jparkin@amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubp.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubp.c
index 159bebc..0cbc83e 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubp.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubp.c
@@ -146,6 +146,9 @@ void hubp1_program_size_and_rotation(
         * 444 or 420 luma
         */
        if (format >= SURFACE_PIXEL_FORMAT_VIDEO_BEGIN) {
+               ASSERT(plane_size->video.chroma_pitch != 0);
+               /* Chroma pitch zero can cause system hang! */
+
                pitch = plane_size->video.luma_pitch - 1;
                meta_pitch = dcc->video.meta_pitch_l - 1;
                pitch_c = plane_size->video.chroma_pitch - 1;