drm/amdgpu: refine get gpu clock counter method

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commit 5591a051b8 upstream.

[why]
regGOLDEN_TSC_COUNT_LOWER/regGOLDEN_TSC_COUNT_UPPER are protected and
unaccessible under sriov.
The clock counter high bit may update during reading process.

[How]
Replace regGOLDEN_TSC_COUNT_LOWER/regGOLDEN_TSC_COUNT_UPPER with
regCP_MES_MTIME_LO/regCP_MES_MTIME_HI to get gpu clock under sriov.
Refine get gpu clock counter method to make the result more precise.

Signed-off-by: Tong Liu01 <Tong.Liu01@amd.com>
Acked-by: Luben Tuikov <luben.tuikov@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Tong Liu01 2023-04-06 15:58:31 +08:00 • committed by Greg Kroah-Hartman

parent 4e2f9159f9

commit 055852074c

1 changed files with 15 additions and 2 deletions

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drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c

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