drm/amd/display: get refclk from MICROSECOND_TIME_BASE_DIV HW register

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[why]
recent VBIOS dce_infotable reference clock change caused a I2c regression.
instead of relying on vbios, let's get it from HW directly.

Signed-off-by: Charlene Liu <Charlene.Liu@amd.com>
Reviewed-by: Chris Park <Chris.Park@amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Bindu Ramamurthy <bindu.r@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

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Charlene Liu 2021-05-25 14:06:37 -04:00 • committed by Alex Deucher

parent 1a365683d6

commit 452c76dfd2

2 changed files with 13 additions and 3 deletions

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13

drivers/gpu/drm/amd/display/dc/dce/dce_i2c_hw.c

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3

drivers/gpu/drm/amd/display/dc/dce/dce_i2c_hw.h

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