drm/amd/display: Guard calls to hdcp_ta and dtm_ta

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[Why]
The buffer used when calling psp is a shared buffer. If we have multiple calls
at the same time we can overwrite the buffer.

[How]
Add mutex to guard the shared buffer.

Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Bhawanpreet Lakha 2020-03-30 17:44:00 -04:00 • committed by Alex Deucher

parent c0ed2ca61f

commit 8913f7ff05

3 changed files with 257 additions and 167 deletions

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2

drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c

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2

drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h

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412

drivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c

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