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(parent: bac6067) | patch
drm/amd/display: Add I2C escape to support query device exist.
authorJinZe.Xu <JinZe.Xu@amd.com>
Thu, 10 Mar 2022 22:20:34 +0000 (17:20 -0500)
committerAlex Deucher <alexander.deucher@amd.com>
Tue, 15 Mar 2022 18:41:03 +0000 (14:41 -0400)
commitcf243ff87d2b731a257918a23c3dd1390145b97a
tree6e3ae985515b05f3eee0ba0dc257ca5e71d96fb0tree | snapshot
parentbac606724744b639d520cd14efd8b7c178f9d711commit | diff
drm/amd/display: Add I2C escape to support query device exist.

[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>
drivers/gpu/drm/amd/display/dc/core/dc.c diff | blob | history
drivers/gpu/drm/amd/display/dc/dc_link.h diff | blob | history
drivers/gpu/drm/amd/display/dc/dce/dce_i2c.c diff | blob | history
drivers/gpu/drm/amd/display/dc/dce/dce_i2c.h diff | blob | history
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