[PATCH 4.2 147/258] drm/amdgpu: Restore LCD backlight level on resume

From	Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Newsgroups	linux.kernel
Subject	[PATCH 4.2 147/258] drm/amdgpu: Restore LCD backlight level on resume
Date	2015-10-18 06:40 +0200
Message-ID	<qkNVf-2KP-7@gated-at.bofh.it> (permalink)
References	<qkLJM-7Yc-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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4.2-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Alex Deucher <alexander.deucher@amd.com>

commit 74b3112e95073b351e3b0b9799795bc76f8415fa upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/gpu/drm/amd/amdgpu/atombios_encoders.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- 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
 			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 {


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[PATCH 4.2 147/258] drm/amdgpu:  Restore LCD backlight level on resume Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2015-10-18 06:40 +0200

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