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From bc1dbae20a4b3d122fc94fb14a2d0e316f677d03 Mon Sep 17 00:00:00 2001
From: Xiaodong Yan <Xiaodong.Yan@amd.com>
Date: Thu, 17 Jan 2019 00:18:01 +0800
Subject: [PATCH 1202/2940] drm/amd/display: Add monitor patch for backlight
off
[Why]
Different panel need different time from backlight disable to end of valid video data,
if the time is too short, panel will flash when dpms off
[How]
Add monitor patch to control the time from backlight disable to end of valid video data,
Change-Id: Iac651aa22197bce98b1c7c8537333891b87d474e
Signed-off-by: Xiaodong Yan <Xiaodong.Yan@amd.com>
Reviewed-by: Wenjing Liu <Wenjing.Liu@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
---
drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c | 4 ++++
drivers/gpu/drm/amd/display/dc/dc_types.h | 1 +
2 files changed, 5 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c
index 16d441d3af8a..f7f7515f65f4 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c
@@ -119,6 +119,10 @@ bool edp_receiver_ready_T9(struct dc_link *link)
break;
udelay(100); //MAx T9
} while (++tries < 50);
+
+ if (link->local_sink->edid_caps.panel_patch.extra_delay_backlight_off > 0)
+ udelay(link->local_sink->edid_caps.panel_patch.extra_delay_backlight_off * 1000);
+
return result;
}
bool edp_receiver_ready_T7(struct dc_link *link)
diff --git a/drivers/gpu/drm/amd/display/dc/dc_types.h b/drivers/gpu/drm/amd/display/dc/dc_types.h
index 56e7f3dab15a..da2009a108cf 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_types.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_types.h
@@ -201,6 +201,7 @@ union display_content_support {
struct dc_panel_patch {
unsigned int dppowerup_delay;
unsigned int extra_t12_ms;
+ unsigned int extra_delay_backlight_off;
};
struct dc_edid_caps {
--
2.17.1
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