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

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Date:	Wed, 11 Nov 2015 15:43:21 +0000
From:	Luis Henriques <luis.henriques@...onical.com>
To:	Michel Dänzer <michel@...nzer.net>
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 Mon, Nov 02, 2015 at 04:52:06PM +0900, Michel Dänzer wrote:
> On 28.10.2015 19:45, Luis Henriques wrote:
> > On Tue, Oct 27, 2015 at 11:10:29AM +0900, Michel Dänzer wrote:
> >> 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.
> > 
> > Thanks, I'll drop this patch for this 3.16 release, and will wait for a
> > fix to be available.
> 
> The regression is fixed in commits
> 4cee6a9057d5e13911f0cb6e143d11dc1a3245dd and
> ae93580ee59c02395c1711d3e6b90546b8137b86 . Please only backport
> 4281f46ef839050d2ef60348f661eb463c21cc2e together with those two.
> 

Thanks (and sorry for the delay in my reply!).

I'll queue all these 3 commits for the 3.16 kernel.  Commit 4cee6a9057d5
("drm/radeon: move bl encoder assignment into bl init") required a bit of
backporting which I would appreciate if you could review it (you'll
received the email with the patch soon).

Cheers,
--
Luís
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