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From 5303c26b207b6f3c5aad5757cfd6b4efdc714d33 Mon Sep 17 00:00:00 2001
From: Yongqiang Sun <yongqiang.sun@amd.com>
Date: Tue, 27 Mar 2018 10:05:10 -0400
Subject: [PATCH 4009/4131] drm/amd/display: Change disable backlight ramp
change threshold from 0 to maximum value.
Instead of user set brightness with range of percentage,
HLK test set brightness level with range of normal, this will result in
HLK test case set brightness from 0 to 255, DC set brightness with ramp is 0,
and disabled ramp change which will fail the HLK test.
Fix:
In case of unblank stream and turn on edp, change brightness level in
stream to 0xFFFFFFFF(actural maximum level is 0xFF), use that value as
a flag to recogonize this the case of resume from S3.
Signed-off-by: Yongqiang Sun <yongqiang.sun@amd.com>
Reviewed-by: Eric Yang <eric.yang2@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
---
drivers/gpu/drm/amd/display/dc/core/dc_link.c | 2 +-
drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c | 2 +-
drivers/gpu/drm/amd/display/dc/inc/hw_sequencer.h | 2 ++
3 files changed, 4 insertions(+), 2 deletions(-)
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 d9efdd9..0cd286f 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
@@ -1982,7 +1982,7 @@ bool dc_link_set_backlight_level(const struct dc_link *link, uint32_t level,
return false;
if (stream) {
- if (stream->bl_pwm_level == 0)
+ if (stream->bl_pwm_level == EDP_BACKLIGHT_RAMP_DISABLE_LEVEL)
frame_ramp = 0;
((struct dc_stream_state *)stream)->bl_pwm_level = level;
diff --git a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
index 432bed6..99d1922 100644
--- a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
@@ -1036,7 +1036,7 @@ void dce110_unblank_stream(struct pipe_ctx *pipe_ctx,
if (link->local_sink && link->local_sink->sink_signal == SIGNAL_TYPE_EDP) {
link->dc->hwss.edp_backlight_control(link, true);
- stream->bl_pwm_level = 0;
+ stream->bl_pwm_level = EDP_BACKLIGHT_RAMP_DISABLE_LEVEL;
}
}
void dce110_blank_stream(struct pipe_ctx *pipe_ctx)
diff --git a/drivers/gpu/drm/amd/display/dc/inc/hw_sequencer.h b/drivers/gpu/drm/amd/display/dc/inc/hw_sequencer.h
index e764cba..f54d478 100644
--- a/drivers/gpu/drm/amd/display/dc/inc/hw_sequencer.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/hw_sequencer.h
@@ -32,6 +32,8 @@
#include "inc/hw/link_encoder.h"
#include "core_status.h"
+#define EDP_BACKLIGHT_RAMP_DISABLE_LEVEL 0xFFFFFFFF
+
enum pipe_gating_control {
PIPE_GATING_CONTROL_DISABLE = 0,
PIPE_GATING_CONTROL_ENABLE,
--
2.7.4
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