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drm/amd/display: Fix DP HBR2 Eye Diagram Pattern on Carrizo 

[why] dp hbr2 eye diagram pattern for raven asic is not stabled.
workaround is to use tp4 pattern. But this should not be
applied to asic before raven.

[how] add new bool varilable in asic caps. for raven asic,
use the workaround. for carrizo, vega, do not use workaround.

Signed-off-by: Hersen Wu <hersenxs.wu@amd.com>
Reviewed-by: Harry Wentland <Harry.Wentland@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Hersen Wu 2018-07-16 11:21:12 -04:00 committed by Alex Deucher
parent 5ae6fe5729
commit 9315e2399a
3 changed files with 6 additions and 5 deletions
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8
drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
View File

@ -1784,12 +1784,10 @@ static void dp_test_send_link_training(struct dc_link *link)
dp_retrain_link_dp_test(link, &link_settings, false);
}
/* TODO hbr2 compliance eye output is unstable
/* TODO Raven hbr2 compliance eye output is unstable
* (toggling on and off) with debugger break
* This caueses intermittent PHY automation failure
* Need to look into the root cause */
static uint8_t force_tps4_for_cp2520 = 1;
static void dp_test_send_phy_test_pattern(struct dc_link *link)
{
union phy_test_pattern dpcd_test_pattern;
@ -1849,13 +1847,13 @@ static void dp_test_send_phy_test_pattern(struct dc_link *link)
break;
case PHY_TEST_PATTERN_CP2520_1:
/* CP2520 pattern is unstable, temporarily use TPS4 instead */
test_pattern = (force_tps4_for_cp2520 == 1) ?
test_pattern = (link->dc->caps.force_dp_tps4_for_cp2520 == 1) ?
DP_TEST_PATTERN_TRAINING_PATTERN4 :
DP_TEST_PATTERN_HBR2_COMPLIANCE_EYE;
break;
case PHY_TEST_PATTERN_CP2520_2:
/* CP2520 pattern is unstable, temporarily use TPS4 instead */
test_pattern = (force_tps4_for_cp2520 == 1) ?
test_pattern = (link->dc->caps.force_dp_tps4_for_cp2520 == 1) ?
DP_TEST_PATTERN_TRAINING_PATTERN4 :
DP_TEST_PATTERN_HBR2_COMPLIANCE_EYE;
break;

1
drivers/gpu/drm/amd/display/dc/dc.h
View File

@ -77,6 +77,7 @@ struct dc_caps {
bool is_apu;
bool dual_link_dvi;
bool post_blend_color_processing;
bool force_dp_tps4_for_cp2520;
};
struct dc_dcc_surface_param {

2
drivers/gpu/drm/amd/display/dc/dcn10/dcn10_resource.c
View File

@ -1127,6 +1127,8 @@ static bool construct(
dc->caps.max_slave_planes = 1;
dc->caps.is_apu = true;
dc->caps.post_blend_color_processing = false;
/* Raven DP PHY HBR2 eye diagram pattern is not stable. Use TP4 */
dc->caps.force_dp_tps4_for_cp2520 = true;
if (dc->ctx->dce_environment == DCE_ENV_PRODUCTION_DRV)
dc->debug = debug_defaults_drv;