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drm/amd/display: Move verify link cap after read edid

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DP link layer test 400.1.1 fails intermittently.
The test device will pull hpd low immediately
after verify link cap.
Driver reads edid when hpd low that causes the test to fail.

Move read edid before verify link cap, so driver will
read edid before starting link training

Signed-off-by: Wenjing Liu <Wenjing.Liu@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Wenjing Liu
2017-08-03 13:57:05 -04:00
committed by Alex Deucher
parent d66cf5f501
commit f334073ae3
2 changed files with 16 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/gpu/drm/amd/display/dc/core/dc_link.c
View File

@@ -666,6 +666,22 @@ bool dc_link_detect(struct dc_link *link, bool boot)
break;
}
if (link->connector_signal == SIGNAL_TYPE_DISPLAY_PORT &&
sink_caps.transaction_type ==
DDC_TRANSACTION_TYPE_I2C_OVER_AUX) {
/*
* TODO debug why Dell 2413 doesn't like
* two link trainings
*/
if (is_mst_supported(link)) {
link->verified_link_cap =
link->reported_link_cap;
} else {
dp_hbr_verify_link_cap(link,
&link->reported_link_cap);
}
}
/* HDMI-DVI Dongle */
if (sink->sink_signal == SIGNAL_TYPE_HDMI_TYPE_A &&
!sink->edid_caps.edid_hdmi)

7
drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
View File

@@ -2283,13 +2283,6 @@ void detect_dp_sink_caps(struct dc_link *link)
* DP, hw_init may need check signal or power up
* encoder here.
*/
if (is_mst_supported(link)) {
link->verified_link_cap = link->reported_link_cap;
} else {
dp_hbr_verify_link_cap(link,
&link->reported_link_cap);
}
/* TODO save sink caps in link->sink */
}