drm/i915/mtl: Update workaround 14018575942

The WA should be extended to cover VDBOX engine. We found that
28-channels 1080p VP9 encoding may hit this issue.

v3: update the WA number and explain the reason why
    this workaround is needed
v2: add WA number
v1: initial version

Signed-off-by: Angus Chen <angus.chen@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Signed-off-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240426073638.45775-1-angus.chen@intel.com

diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
index 5a0f1b279a80db9cb78b69b289de53765132b25b..09a287c1aedd67e66eb0fbb3079ee5166143f32f 100644 (file)
--- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
@@ -1590,6 +1590,14 @@ xelpmp_gt_workarounds_init(struct intel_gt *gt, struct i915_wa_list *wal)
         */
        wa_write_or(wal, XELPMP_GSC_MOD_CTRL, FORCE_MISS_FTLB);
 
+       /*
+        * Wa_14018575942
+        *
+        * Issue is seen on media KPI test running on VDBOX engine
+        * especially VP9 encoding WLs
+        */
+       wa_write_or(wal, XELPMP_VDBX_MOD_CTRL, FORCE_MISS_FTLB);
+
        /* Wa_22016670082 */
        wa_write_or(wal, GEN12_SQCNT1, GEN12_STRICT_RAR_ENABLE);