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3 commits

Author SHA1 Message Date
JinZe.Xu
a0248d543b 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>
2022-03-15 14:41:03 -04:00
David Francis
d377ae4e37 drm/amd/display: Remove redundant i2c structs
[Why]
The i2c code contains two structs that contain the same
information as i2c_payload

[How]
Replace references to those structs with references to
i2c_payload

dce_i2c_transaction_request->status was written to but never read,
so all references to it are removed

Signed-off-by: David Francis <David.Francis@amd.com>
Reviewed-by: Jordan Lazare <Jordan.Lazare@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2018-08-27 15:20:56 -05:00
David Francis
c85e6e546e drm/amd/display: Create new i2c resource
[Why]
I2C code did not match dc resource model and was generally
unpleasant

[How]
Move code into new svelte dce_i2c files, replacing various i2c
objects with two structs: dce_i2c_sw and dce_i2c_hw.  Fully split
sw and hw code paths.  Remove all redundant declarations.  Use
address lists to distinguish between versions.  Change dce80 code
to newer register access macros.

Signed-off-by: David Francis <David.Francis@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2018-08-27 11:11:05 -05:00