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authorVille Syrjälä <ville.syrjala@linux.intel.com>2020-04-29 13:10:23 +0300
committerVille Syrjälä <ville.syrjala@linux.intel.com>2020-05-04 18:44:52 +0300
commit25444ca6cbb9fe375aa9bba58784a735efe2a649 (patch)
tree4ba27f01e7d37a44ef27f34cba23e0d0cf08cd25 /tools/perf/scripts/python/export-to-postgresql.py
parent9ff79708c54d34a3d4d451b15f8d6e5e042f1d36 (diff)
drm/i915/fbc: Require linear fb stride to be multiple of 512 bytes on gen9/glk
Display WA #1105 says that FBC requires PLANE_STRIDE to be a multiple of 512 bytes on gen9 and glk. This is definitely true for glk as certain tests (such as igt/kms_big_fb/linear-16bpp-rotate-0) are now failing when the display resolution results in a plane stride which is not a multiple of 512 bytes. Curiously I was not able to reproduce this on a KBL. First I suspected that our use of the FBC override stride explain this, but after trying to use the override stride on glk the test still failed. I did try both the old CHICKEN_MISC_4 way and the new FBC_STRIDE way, neither had any effect on the result. Anyways, we need this at least on glk. But let's trust the spec and apply the w/a for all gen9 as well, despite being unable to reproduce the problem. v2: s/FBC_CHICKEN/FBC_STRIDE/ in commit msg Cc: José Roberto de Souza <jose.souza@intel.com> Fixes: 691f7ba58d52 ("drm/i915/display/fbc: Make fences a nice-to-have for GEN9+") Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200429101034.8208-2-ville.syrjala@linux.intel.com Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
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