This is a note to let you know that I've just added the patch titled
drm/radeon: Restore LCD backlight level on resume (>= R5xx)
to the 4.2-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-radeon-restore-lcd-backlight-level-on-resume-r5xx.patch
and it can be found in the queue-4.2 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 4281f46ef839050d2ef60348f661eb463c21cc2e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Michel=20D=C3=A4nzer?= <michel.daenzer@xxxxxxx>
Date: Mon, 28 Sep 2015 18:16:31 +0900
Subject: drm/radeon: Restore LCD backlight level on resume (>= R5xx)
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From: =?UTF-8?q?Michel=20D=C3=A4nzer?= <michel.daenzer@xxxxxxx>
commit 4281f46ef839050d2ef60348f661eb463c21cc2e 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.
Only the radeon_atom_encoder_dpms_dig part tested on a Kaveri laptop,
the radeon_atom_encoder_dpms_avivo part is only compile tested.
Signed-off-by: Michel Dänzer <michel.daenzer@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/radeon/atombios_encoders.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
--- a/drivers/gpu/drm/radeon/atombios_encoders.c
+++ b/drivers/gpu/drm/radeon/atombios_encoders.c
@@ -1624,8 +1624,9 @@ radeon_atom_encoder_dpms_avivo(struct dr
} else
atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
if (radeon_encoder->devices & (ATOM_DEVICE_LCD_SUPPORT)) {
- args.ucAction = ATOM_LCD_BLON;
- atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
+ struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
+
+ atombios_set_backlight_level(radeon_encoder, dig->backlight_level);
}
break;
case DRM_MODE_DPMS_STANDBY:
@@ -1706,8 +1707,7 @@ radeon_atom_encoder_dpms_dig(struct drm_
atombios_dig_encoder_setup(encoder, ATOM_ENCODER_CMD_DP_VIDEO_ON, 0);
}
if (radeon_encoder->devices & (ATOM_DEVICE_LCD_SUPPORT))
- atombios_dig_transmitter_setup(encoder,
- ATOM_TRANSMITTER_ACTION_LCD_BLON, 0, 0);
+ atombios_set_backlight_level(radeon_encoder, dig->backlight_level);
if (ext_encoder)
atombios_external_encoder_setup(encoder, ext_encoder, ATOM_ENABLE);
break;
Patches currently in stable-queue which might be from michel.daenzer@xxxxxxx are
queue-4.2/drm-radeon-restore-lcd-backlight-level-on-resume-r5xx.patch
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