drm/amd/display: Add I2C escape to support query device exist.

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[How]
1. Search OEM I2C info from BIOS and compare with input parameter.
2. If BIOS doesn't record it, just try to read one byte.

Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Agustin Gutierrez <agustin.gutierrez@amd.com>
Signed-off-by: JinZe.Xu <JinZe.Xu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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JinZe.Xu 2022-03-10 17:20:34 -05:00 • committed by Alex Deucher

parent 436afdfa35

commit a0248d543b

4 changed files with 50 additions and 0 deletions

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13

drivers/gpu/drm/amd/display/dc/core/dc.c

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5

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

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26

drivers/gpu/drm/amd/display/dc/dce/dce_i2c.c

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6

drivers/gpu/drm/amd/display/dc/dce/dce_i2c.h

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