[PATCH AUTOSEL 5.2 022/171] drm/amd/display: Fill plane attrs only for valid pxl format

[Sasha Levin]

From: Roman Li <Roman.Li@xxxxxxx>

[ Upstream commit 1894478ad1f8fd7366edc5cee49ee9caea0e3d52 ]

[Why]
In fill_plane_buffer_attributes() we calculate chroma/luma
assuming that the surface_pixel_format is always valid.
If it's not the case, there's a risk of divide by zero error.

[How]
Check if format valid before calculating pixel format attributes

Signed-off-by: Roman Li <Roman.Li@xxxxxxx>
Reviewed-by: David Francis <David.Francis@xxxxxxx>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index fa268dd736f4..31530bfd002a 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -2592,7 +2592,7 @@ fill_plane_buffer_attributes(struct amdgpu_device *adev,
 		address->type = PLN_ADDR_TYPE_GRAPHICS;
 		address->grph.addr.low_part = lower_32_bits(afb->address);
 		address->grph.addr.high_part = upper_32_bits(afb->address);
-	} else {
+	} else if (format < SURFACE_PIXEL_FORMAT_INVALID) {
 		uint64_t chroma_addr = afb->address + fb->offsets[1];
 
 		plane_size->video.luma_size.x = 0;
-- 
2.20.1