Re: [PATCH 02/10] drm/sun4i: Disable YUV channel when using the frontend and set interlace

[Maxime Ripard]

On Tue, Mar 27, 2018 at 10:00:43AM +0200, Paul Kocialkowski wrote:
> Hi,
> 
> On Fri, 2018-03-23 at 10:55 +0100, Maxime Ripard wrote:
> > On Wed, Mar 21, 2018 at 04:28:56PM +0100, Paul Kocialkowski wrote:
> > > The YUV channel was only disabled in
> > > sun4i_backend_update_layer_formats,
> > > which is not called when the frontend is selected.
> > > 
> > > Thus, creating a layer with a YUV format handled by the backend and
> > > then
> > > switching to a format that requires the frontend would keep the YUV
> > > channel enabled for the layer.
> > > 
> > > This explicitly disables the YUV channel for the layer when using
> > > the
> > > frontend as well. It also sets the relevant interlace bit, which was
> > > missing in the frontend path as well.
> > 
> > This should be part of a separate patch. Usually, if you write "it
> > also does..." at the end of your commit log, it's a pretty good
> > indication that it should be another patch :)
> 
> I must say, I figured that this part was missing in the frontend path by
> chance and couldn't really test the feature, so I'm also tempted to drop
> it altogether. What do you think?

If you haven't been able to test it, then yeah, don't submit it.

> Also, is interlacing actually used on any of the video outputs we
> support? Perhaps RGB?

Composite would be a better guess :)

Maxime

-- 
Maxime Ripard, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com

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