From 171e445ecfbd9ae94b6012a6197b309cf9afdd59 Mon Sep 17 00:00:00 2001
From: Meenakshikumar Somasundaram <meenakshikumar.somasundaram@amd.com>
Date: Mon, 11 Jul 2022 18:37:41 -0400
Subject: drm/amd/display: Fix TDR eDP and USB4 display light up issue
Git-commit: 30456ffa65469d1d2e5e1da05017e6728d24c11c
Patch-mainline: v6.0-rc2
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 jsc#PED-2849
[Why]
After TDR recovery, eDP and USB4 display does not light up. Because
dmub outbox notifications are not enabled after dmub reload and link
encoder assignments for the streams are not cleared before dc state
reset.
[How]
- Dmub outbox notification is enabled after tdr recovery by issuing
inbox command to dmub.
- Link encoders for the streams are unassigned before dc state reset.
Reviewed-by: Jimmy Kizito <Jimmy.Kizito@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Tom Chung <chiahsuan.chung@amd.com>
Signed-off-by: Meenakshikumar Somasundaram <meenakshikumar.somasundaram@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.c | 1 +
drivers/gpu/drm/amd/display/dc/dc_link.h | 1 +
2 files changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index ce8910ad2783..663be10b292b 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -4337,6 +4337,7 @@ void dc_enable_dmub_outbox(struct dc *dc)
struct dc_context *dc_ctx = dc->ctx;
dmub_enable_outbox_notification(dc_ctx->dmub_srv);
+ DC_LOG_DC("%s: dmub outbox notifications enabled\n", __func__);
}
/**
diff --git a/drivers/gpu/drm/amd/display/dc/dc_link.h b/drivers/gpu/drm/amd/display/dc/dc_link.h
index a0af0f6afeef..9544abf75e84 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_link.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_link.h
@@ -344,6 +344,7 @@ enum dc_detect_reason {
DETECT_REASON_HPDRX,
DETECT_REASON_FALLBACK,
DETECT_REASON_RETRAIN,
+ DETECT_REASON_TDR,
};
bool dc_link_detect(struct dc_link *dc_link, enum dc_detect_reason reason);
--
2.38.1