drm/amd/display: add i2c speed arbitration for dc_i2c and hdcp_i2c

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[why]
HDCP 1.4 failed on SL8800 SW w/a test driver use.

[how]
slower down the HW i2c speed when used by HW i2c.
this request: each acquired_i2c_engine setup the i2c speed needed.
and set the I2c engine for HDCP use at release_engine.

this covers SW using HW I2c engine and HDCP using HW I2c engine. for
dmcu using HW I2c engine, needs add similar logic in dmcufw.

Signed-off-by: Charlene Liu <Charlene.Liu@amd.com>
Reviewed-by: Chris Park <Chris.Park@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Charlene Liu 2020-09-21 14:24:09 -04:00 • committed by Alex Deucher

parent a2a8857cee

commit e97978e812

2 changed files with 2 additions and 0 deletions

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1

drivers/gpu/drm/amd/display/dc/dcn301/dcn301_resource.c

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1

drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c

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