From d9abdd7dcd8f65d7f63f3ed42d5d0b500c1e1293 Mon Sep 17 00:00:00 2001
From: Sung Joon Kim <sungjoon.kim@amd.com>
Date: Thu, 24 Feb 2022 14:58:52 -0500
Subject: drm/amd/display: disable HPD SW timer for passive dongle type 1 only
Git-commit: 4a897de1d607c15ebb9aa11a424ec3f3243304a3
Patch-mainline: v5.18-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225
[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>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/amd/display/dc/core/dc_link.c | 1 +
drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c | 2 ++
drivers/gpu/drm/amd/display/dc/dc.h | 1 +
drivers/gpu/drm/amd/display/include/ddc_service_types.h | 1 +
4 files changed, 5 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
index 1951a92e3417..b3ca3307d39d 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
@@ -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;
}
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c
index f1bbd918de35..1d4863763df9 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c
@@ -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;
diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h
index 333f4a49cacb..a57ac086f2bd 100644
--- a/drivers/gpu/drm/amd/display/dc/dc.h
+++ b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -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. */
diff --git a/drivers/gpu/drm/amd/display/include/ddc_service_types.h b/drivers/gpu/drm/amd/display/include/ddc_service_types.h
index f561e213bf98..f883d87791fe 100644
--- a/drivers/gpu/drm/amd/display/include/ddc_service_types.h
+++ b/drivers/gpu/drm/amd/display/include/ddc_service_types.h
@@ -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)
--
2.38.1