drm/i915/gt: Fix CCS id's calculation for CCS mode setting
[ Upstream commit ee01b6a3 ] The whole point of the previous fixes has been to change the CCS hardware configuration to generate only one stream available to the compute users. We did this by changing the info.engine_mask that is set during device probe, reset during the detection of the fused engines, and finally reset again when choosing the CCS mode. We can't use the engine_mask variable anymore, as with the current configuration, it imposes only one CCS no matter what the hardware configuration is. Before changing the engine_mask for the third time, save it and use it for calculating the CCS mode. After the previous changes, the user reported a performance drop to around 1/4. We have tested that the compute operations, with the current patch, have improved by the same factor. Fixes: 6db31251 ("drm/i915/gt: Enable only one CCS for compute workload") Signed-off-by:Andi Shyti <andi.shyti@linux.intel.com> Cc: Chris Wilson <chris.p.wilson@linux.intel.com> Cc: Gnattu OC <gnattuoc@me.com> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Matt Roper <matthew.d.roper@intel.com> Tested-by:
Jian Ye <jian.ye@intel.com> Reviewed-by:
Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com> Tested-by:
Gnattu OC <gnattuoc@me.com> Link: https://patchwork.freedesktop.org/patch/msgid/20240517090616.242529-1-andi.shyti@linux.intel.com (cherry picked from commit a09d2327 ) Signed-off-by:
Jani Nikula <jani.nikula@intel.com> Signed-off-by:
Sasha Levin <sashal@kernel.org>
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