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From 74b3112e95073b351e3b0b9799795bc76f8415fa Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@amd.com>
Date: Tue, 29 Sep 2015 13:53:30 -0400
Subject: [PATCH 0566/1050] drm/amdgpu: Restore LCD backlight level on resume
Instead of only enabling the backlight (which seems to set it to max
brightness), just re-set the current backlight level, which also takes
care of enabling the backlight if necessary.
Port of radeon commit:
drm/radeon: Restore LCD backlight level on resume (>= R5xx)
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
---
drivers/gpu/drm/amd/amdgpu/atombios_encoders.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/atombios_encoders.c b/drivers/gpu/drm/amd/amdgpu/atombios_encoders.c
index cd6edc4..1e0bba2 100644
--- a/drivers/gpu/drm/amd/amdgpu/atombios_encoders.c
+++ b/drivers/gpu/drm/amd/amdgpu/atombios_encoders.c
@@ -1279,8 +1279,7 @@ amdgpu_atombios_encoder_setup_dig(struct drm_encoder *encoder, int action)
amdgpu_atombios_encoder_setup_dig_encoder(encoder, ATOM_ENCODER_CMD_DP_VIDEO_ON, 0);
}
if (amdgpu_encoder->devices & (ATOM_DEVICE_LCD_SUPPORT))
- amdgpu_atombios_encoder_setup_dig_transmitter(encoder,
- ATOM_TRANSMITTER_ACTION_LCD_BLON, 0, 0);
+ amdgpu_atombios_encoder_set_backlight_level(amdgpu_encoder, dig->backlight_level);
if (ext_encoder)
amdgpu_atombios_encoder_setup_external_encoder(encoder, ext_encoder, ATOM_ENABLE);
} else {
--
1.9.1
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