drm/amd/display: Add control mechanism for FPU

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DC invokes DC_FPU_START/END in multiple parts of the code; this can
create a situation where we invoke this FPU operation in a nested way or
exit too early. For avoiding this situation, this commit adds a
mechanism where dc_fpu_begin/end manages the access to
kernel_fpu_begin/end.

Change since V3:
- Christian: Move PPC64 code to dc_fpu_begin/end.

Change since V2:
- Christian: Do not use this_cpu_* between get/put_cpu_ptr().

Change since V1:
- Use a better variable names
- Use get_cpu_ptr and put_cpu_ptr to better balance preemption enable
and disable

Cc: Harry Wentland <harry.wentland@amd.com>
Cc: Anson Jacob <Anson.Jacob@amd.com>
Cc: Christian König <christian.koenig@amd.com>
Cc: Hersen Wu <hersenxs.wu@amd.com>
Cc: Aric Cyr <aric.cyr@amd.com>
Cc: Jun Lei <jun.lei@amd.com>
Cc: Dmytro Laktyushkin <dmytro.laktyushkin@amd.com>
Cc: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Rodrigo Siqueira 2021-07-26 20:52:46 -04:00 • committed by Alex Deucher

parent c8b3538d05

commit 96ee63730f

6 changed files with 160 additions and 32 deletions

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4

drivers/gpu/drm/amd/display/amdgpu_dm/Makefile

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21

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_trace.h

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96

drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c

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33

drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.h

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3

drivers/gpu/drm/amd/display/dc/dc_trace.h

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35

drivers/gpu/drm/amd/display/dc/os_types.h

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