drm/i915/dsb: Avoid reads of the DSB buffer for indexed register writes

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Reading from the DSB command buffer might be somewhat expensive on
discrete GPUs because the buffer resides in GPU local memory. Avoid
such reads in the indexed register write handling by tracking the
previous instruction in intel_dsb.

TODO: actually measure this

Reviewed-by: Animesh Manna <animesh.manna@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240930170415.23841-2-ville.syrjala@linux.intel.com

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Ville Syrjälä 2024-09-30 20:04:03 +03:00

parent de0cbc7418

commit 0e94059113

1 changed files with 32 additions and 22 deletions

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drivers/gpu/drm/i915/display/intel_dsb.c

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