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drm/amd/display: disable HPD SW timer for passive dongle type 1 only

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[why]
Need to provide this workaround
only for type 1 passive dongle

[how]
Detect if dongle is type 1 or 2.
And use it to determine if w/a is needed.

Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Alan Liu <HaoPing.Liu@amd.com>
Signed-off-by: Sung Joon Kim <sungjoon.kim@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Sung Joon Kim 2022-02-24 14:58:52 -05:00 committed by Alex Deucher
parent 76a52f36b6
commit 4a897de1d6
4 changed files with 5 additions and 0 deletions
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1
drivers/gpu/drm/amd/display/dc/core/dc_link.c
View File

@ -731,6 +731,7 @@ static bool detect_dp(struct dc_link *link,
sink_caps,
audio_support);
link->dpcd_caps.dongle_type = sink_caps->dongle_type;
link->dpcd_caps.is_dongle_type_one = sink_caps->is_dongle_type_one;
link->dpcd_caps.dpcd_rev.raw = 0;
}

2
drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c
View File

@ -493,6 +493,7 @@ void dal_ddc_service_i2c_query_dp_dual_mode_adaptor(
sink_cap->max_hdmi_pixel_clock =
max_tmds_clk * 1000;
}
sink_cap->is_dongle_type_one = false;
} else {
if (is_valid_hdmi_signature == true) {
@ -510,6 +511,7 @@ void dal_ddc_service_i2c_query_dp_dual_mode_adaptor(
"Type 1 DP-HDMI passive dongle (no signature) %dMhz: ",
sink_cap->max_hdmi_pixel_clock / 1000);
}
sink_cap->is_dongle_type_one = true;
}
return;

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

@ -1206,6 +1206,7 @@ struct dpcd_caps {
/* dongle type (DP converter, CV smart dongle) */
enum display_dongle_type dongle_type;
bool is_dongle_type_one;
/* branch device or sink device */
bool is_branch_dev;
/* Dongle's downstream count. */

1
drivers/gpu/drm/amd/display/include/ddc_service_types.h
View File

@ -64,6 +64,7 @@ enum ddc_service_type {
struct display_sink_capability {
/* dongle type (DP converter, CV smart dongle) */
enum display_dongle_type dongle_type;
bool is_dongle_type_one;
/**********************************************************
capabilities going INTO SINK DEVICE (stream capabilities)