drm/i915/display: Add Wa_16023981245

Disable the support for odd panning in x direction.

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]

v6: Replace -EINVAL with hsub [Suraj]
    Remove src_w check as not required

v7: Remove check for NV12.
    Add check for PTL as well [Matt]

v8: Alignment fix

Continuing discussions from:
https://patchwork.freedesktop.org/series/136416/

Signed-off-by: Nemesa Garg <nemesa.garg@intel.com>
Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>
Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241028044153.1605209-1-nemesa.garg@intel.com

diff --git a/drivers/gpu/drm/i915/display/intel_atomic_plane.c b/drivers/gpu/drm/i915/display/intel_atomic_plane.c
index b7e4620..73fe36f 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_atomic_plane.c
+++ b/drivers/gpu/drm/i915/display/intel_atomic_plane.c
@@ -1024,6 +1024,12 @@ int intel_plane_check_src_coordinates(struct intel_plane_state *plane_state)
                 */
                hsub = 1;
                vsub = 1;
+
+               /* Wa_16023981245 */
+               if ((DISPLAY_VER_FULL(i915) == IP_VER(20, 0) ||
+                    DISPLAY_VER_FULL(i915) == IP_VER(30, 0)) &&
+                    src_x % 2 != 0)
+                       hsub = 2;
        } else {
                hsub = fb->format->hsub;
                vsub = fb->format->vsub;