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drm/amd/display: Set number of pipes to 1 if the second pipe was disabled

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[why]
Some ODM-related register settings are inconsistently updated by VBIOS, causing
the state in DC to be invalid, which would then end up crashing in certain
use-cases (such as disable/enable device).

[how]
Check the enabled status of the second pipe when determining the number of
OPTC sources. If the second pipe is disabled, set the number of sources to 1
regardless of other settings (that may not be updated correctly).

Signed-off-by: Nikola Cornij <nikola.cornij@amd.com>
Reviewed-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Nikola Cornij 2019-08-28 18:30:43 -04:00 committed by Alex Deucher
parent 2ad0cdf9e2
commit 2fef0faa1c
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/amd/display/dc/dcn20/dcn20_optc.c
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@ -287,6 +287,10 @@ void optc2_get_optc_source(struct timing_generator *optc,
*num_of_src_opp = 2;
else
*num_of_src_opp = 1;
/* Work around VBIOS not updating OPTC_NUM_OF_INPUT_SEGMENT */
if (*src_opp_id_1 == 0xf)
*num_of_src_opp = 1;
}
void optc2_set_dwb_source(struct timing_generator *optc,