From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
There's some kind of weird corner cases in FBC which requires
FBC segments to be separated by at least one extra cacheline.
Make sure that is present.
v2: Respin to fit in with skl_fbc_min_cfb_stride()
v3: Make it build
Reviewed-by: Juha-Pekka Heikkila <juhapekka.heikkila@xxxxxxxxx> #v1
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_fbc.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
index ff05eb83e204..2df6a4e115a1 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -84,7 +84,8 @@ static unsigned int _intel_fbc_cfb_stride(const struct intel_fbc_state_cache *ca
}
/* minimum acceptable cfb stride in bytes, assuming 1:1 compression limit */
-static unsigned int skl_fbc_min_cfb_stride(const struct intel_fbc_state_cache *cache)
+static unsigned int skl_fbc_min_cfb_stride(struct drm_i915_private *i915,
+ const struct intel_fbc_state_cache *cache)
{
unsigned int limit = 4; /* 1:4 compression limit is the worst case */
unsigned int cpp = 4; /* FBC always 4 bytes per pixel */
@@ -94,6 +95,13 @@ static unsigned int skl_fbc_min_cfb_stride(const struct intel_fbc_state_cache *c
/* minimum segment stride we can use */
stride = cache->plane.src_w * cpp * height / limit;
+ /*
+ * Wa_16011863758: icl+
+ * Avoid some hardware segment address miscalculation.
+ */
+ if (DISPLAY_VER(i915) >= 11)
+ stride += 64;
+
/*
* At least some of the platforms require each 4 line segment to
* be 512 byte aligned. Just do it always for simplicity.
@@ -116,7 +124,7 @@ static unsigned int intel_fbc_cfb_stride(struct drm_i915_private *i915,
* that regardless of the compression limit we choose later.
*/
if (DISPLAY_VER(i915) >= 9)
- return max(ALIGN(stride, 512), skl_fbc_min_cfb_stride(cache));
+ return max(ALIGN(stride, 512), skl_fbc_min_cfb_stride(i915, cache));
else
return stride;
}
--
2.32.0
