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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
View file

@ -1759,6 +1759,7 @@ static bool dcn301_resource_construct(
pool->base.mpcc_count = pool->base.res_cap->num_timing_generator;
dc->caps.max_downscale_ratio = 600;
dc->caps.i2c_speed_in_khz = 100;
dc->caps.i2c_speed_in_khz_hdcp = 5; /*1.4 w/a enabled by default*/
dc->caps.max_cursor_size = 256;
dc->caps.dmdata_alloc_size = 2048;
dc->caps.max_slave_planes = 1;

1
drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c
View file

@ -1307,6 +1307,7 @@ static bool dcn302_resource_construct(
pool->mpcc_count = pool->res_cap->num_timing_generator;
dc->caps.max_downscale_ratio = 600;
dc->caps.i2c_speed_in_khz = 100;
dc->caps.i2c_speed_in_khz_hdcp = 5; /*1.4 w/a applied by derfault*/
dc->caps.max_cursor_size = 256;
dc->caps.dmdata_alloc_size = 2048;