[PATCH v2 2/2] drm: fsl-dcu: enable PIXCLK on LS1021A

[Dmitry Baryshkov]

On Thu, Oct 17, 2024 at 08:50:43AM +0200, Alexander Stein wrote:
> Hi everyone,
> 
> Am Freitag, 27. September 2024, 01:13:57 CEST schrieb Dmitry Baryshkov:
> > On Thu, Sep 26, 2024 at 04:09:03PM GMT, Alexander Stein wrote:
> > > Hi Dmitry,
> > > 
> > > Am Donnerstag, 26. September 2024, 08:05:56 CEST schrieb Dmitry Baryshkov:
> > > > On Thu, Sep 26, 2024 at 07:55:51AM GMT, Alexander Stein wrote:
> > > > > From: Matthias Schiffer <matthias.schiffer at tq-group.com>
> > > > > 
> > > > > The PIXCLK needs to be enabled in SCFG before accessing certain DCU
> > > > > registers, or the access will hang. For simplicity, the PIXCLK is enabled
> > > > > unconditionally, resulting in increased power consumption.
> > > > 
> > > > By this description it looks like a fix. What is the first broken
> > > > commit? It needs to be mentioned in the Fixes: tag. Or is it hat
> > > > existing devices have been enabling SCFG in some other way?
> > > 
> > > We discussed this internally and it seems this never worked, unless PIXCLK
> > > was already enabled in SCFG by a different way, e.g. firmware, etc.
> > 
> > My bet was on the firmware, but I never touched Layerscape platforms.
> > Anyway,
> > 
> > Fixes: 109eee2f2a18 ("drm/layerscape: Add Freescale DCU DRM driver")
> > Acked-by: Dmitry Baryshkov <dmitry.baryshkov at linaro.org>
> 
> Any additional feedback?

No response from Stefan and Alison for nearly a month...

-- 
With best wishes
Dmitry