linux-kernel - Re: [PATCH 3.16.y-ckt 072/104] drm/radeon: Restore LCD backlight level on resume (>= R5xx)

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Message-ID: <562EDD15.8030205@daenzer.net>
Date:	Tue, 27 Oct 2015 11:10:29 +0900
From:	Michel Dänzer <michel@...nzer.net>
To:	Luis Henriques <luis.henriques@...onical.com>
Cc:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com,
	Alex Deucher <alexander.deucher@....com>
Subject: Re: [PATCH 3.16.y-ckt 072/104] drm/radeon: Restore LCD backlight
 level on resume (>= R5xx)

On 26.10.2015 22:42, Luis Henriques wrote:
> 3.16.7-ckt19 -stable review patch.  If anyone has any objections, please let me know.
> 
> ------------------
> 
> From: =TF-8?q?Michel Dänzer?= <michel.daenzer@....com>
> 
> 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@....com>
> Signed-off-by: Alex Deucher <alexander.deucher@....com>
> Signed-off-by: Luis Henriques <luis.henriques@...onical.com>

We're currently investigating a regression which was bisected to this
change. Please hold off on backporting this change until we have a
solution for that.


-- 
Earthling Michel Dänzer               |               http://www.amd.com
Libre software enthusiast             |             Mesa and X developer
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