drm/i915/display/psr: Lock and unlock PSR around pipe updates

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Frontbuffer rendering and page flips can race with each other
and this can potentialy cause issues with PSR2 selective fetch.

And because pipe/crtc updates are time sentive we can't grab the
PSR lock after intel_pipe_update_start() and before
intel_pipe_update_end().

So here adding the lock and unlock functions and calls, the
proper PSR2 selective fetch handling will come in a separated patch.

v2:
- fixed new functions documentation

Reviewed-by: Jouni Högander <jouni.hogander@intel.com>
Cc: Jouni Högander <jouni.hogander@intel.com>
Cc: Mika Kahola <mika.kahola@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220405155344.47219-2-jose.souza@intel.com

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This commit is contained in:

José Roberto de Souza 2022-04-05 08:53:43 -07:00

parent aa94bf3089

commit 3b6f409547

3 changed files with 70 additions and 10 deletions

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6

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

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69

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

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5

drivers/gpu/drm/i915/display/intel_psr.h

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