Disable the support for odd x pan for even xsize for NV12 format as underrun
issue is seen.
WA: 16024459452
v2: Replace HSD with WA in commit message [Suraj]
Modified the condition for handling odd panning
v3: Simplified the condition for checking hsub
Using older framework for wa as rev1[Jani]
v4: Modify the condition for hsub [Sai Teja]
Initialize hsub in else path [Dan]
v5: Replace IS_LUNARLAKE with display version.
Resolve nitpicks[Jani]
Signed-off-by: Nemesa Garg <nemesa.garg@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_atomic_plane.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_atomic_plane.c b/drivers/gpu/drm/i915/display/intel_atomic_plane.c
index e979786aa5cf..e3401a4f7992 100644
--- a/drivers/gpu/drm/i915/display/intel_atomic_plane.c
+++ b/drivers/gpu/drm/i915/display/intel_atomic_plane.c
@@ -1029,6 +1029,14 @@ int intel_plane_check_src_coordinates(struct intel_plane_state *plane_state)
* This allows NV12 and P0xx formats to have odd size and/or odd
* source coordinates on DISPLAY_VER(i915) >= 20
*/
+ /*
+ * Wa_16023981245 for display version 20.
+ * Do not support odd x-panning for even xsize for NV12.
+ */
+ if (DISPLAY_VER(i915) == 20 && fb->format->format == DRM_FORMAT_NV12 &&
+ src_x % 2 != 0 && src_w % 2 == 0)
+ return -EINVAL;
+
hsub = 1;
vsub = 1;
} else {
--
2.25.1
