linux-kernel - Re: Problem with gpu: ipu-v3: Fix imx-ipuv3-crtc module autoloading

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Message-ID: <1466669559.2278.4.camel@pengutronix.de>
Date:	Thu, 23 Jun 2016 10:12:39 +0200
From:	Philipp Zabel <p.zabel@...gutronix.de>
To:	Stanislav Meduna <stano@...una.org>
Cc:	linux-kernel@...r.kernel.org, Dennis Gilmore <dennis@...il.us>
Subject: Re: Problem with gpu: ipu-v3: Fix imx-ipuv3-crtc module autoloading

Hi Stanislav,

Am Mittwoch, den 22.06.2016, 19:43 +0200 schrieb Stanislav Meduna:
> Hi,
> 
> the c04e6e9 patch
> 
> gpu: ipu-v3: Fix imx-ipuv3-crtc module autoloading
> 
> broke display connected to a TQMa53 i.MX53 board. The lines
> 
> imx-drm display-subsystem: bound imx-ipuv3-crtc.0 (ops ipu_crtc_ops)
> imx-drm display-subsystem: bound imx-ipuv3-crtc.1 (ops ipu_crtc_ops)
> 
> are not present anymore and the display shows random lines.
> 
> I am using the 4.4.12-rt19+ kernel with some local changes, but
>
> the area of this patch is not touched by either.
> 
> I am not sure whether my device tree is at fault (I am not
> an expert here nor did I created the file from scratch) or the patch
> does not take some special case into account. In any case
> reverting the patch solves the problem for me.

It's not your fault. Please update to 4.4.13 or apply commit
310944d148e3 ("drm/imx: Match imx-ipuv3-crtc components using device
node in platform data"). That should fix this issue. See the patch
description for more details.

regards
Philipp