linux-kernel - Re: [PATCH] drm/sun4i: Add a few formats

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Date:   Sat, 29 Oct 2016 18:25:46 +0800
From:   Chen-Yu Tsai <wens@...e.org>
To:     Maxime Ripard <maxime.ripard@...e-electrons.com>
Cc:     Chen-Yu Tsai <wens@...e.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Daniel Vetter <daniel.vetter@...el.com>,
        David Airlie <airlied@...ux.ie>
Subject: Re: [PATCH] drm/sun4i: Add a few formats

On Thu, Oct 27, 2016 at 10:35 PM, Maxime Ripard
<maxime.ripard@...e-electrons.com> wrote:
> Hi,
>
> On Tue, Oct 25, 2016 at 08:42:26AM +0800, Chen-Yu Tsai wrote:
>> On Mon, Oct 24, 2016 at 10:40 PM, Maxime Ripard
>> <maxime.ripard@...e-electrons.com> wrote:
>> > Hi,
>> >
>> > On Fri, Oct 21, 2016 at 11:15:32AM +0800, Chen-Yu Tsai wrote:
>> >> On Tue, Oct 18, 2016 at 4:46 PM, Maxime Ripard
>> >> <maxime.ripard@...e-electrons.com> wrote:
>> >> > The planes can do more than what was previously exposed. Add support for
>> >> > them.
>> >> >
>> >> > Signed-off-by: Maxime Ripard <maxime.ripard@...e-electrons.com>
>> >> > ---
>> >> >  drivers/gpu/drm/sun4i/sun4i_backend.c | 20 ++++++++++++++++++++
>> >> >  drivers/gpu/drm/sun4i/sun4i_layer.c   |  6 ++++++
>> >> >  2 files changed, 26 insertions(+)
>> >> >
>> >> > diff --git a/drivers/gpu/drm/sun4i/sun4i_backend.c b/drivers/gpu/drm/sun4i/sun4i_backend.c
>> >> > index afb7ddf660ef..b184a476a480 100644
>> >> > --- a/drivers/gpu/drm/sun4i/sun4i_backend.c
>> >> > +++ b/drivers/gpu/drm/sun4i/sun4i_backend.c
>> >> > @@ -96,6 +96,22 @@ static int sun4i_backend_drm_format_to_layer(struct drm_plane *plane,
>> >> >                 *mode = SUN4I_BACKEND_LAY_FBFMT_ARGB8888;
>> >> >                 break;
>> >> >
>> >> > +       case DRM_FORMAT_ARGB4444:
>> >> > +               *mode = SUN4I_BACKEND_LAY_FBFMT_ARGB4444;
>> >> > +               break;
>> >> > +
>> >> > +       case DRM_FORMAT_ARGB1555:
>> >> > +               *mode = SUN4I_BACKEND_LAY_FBFMT_ARGB1555;
>> >> > +               break;
>> >> > +
>> >> > +       case DRM_FORMAT_RGBA5551:
>> >> > +               *mode = SUN4I_BACKEND_LAY_FBFMT_RGBA5551;
>> >> > +               break;
>> >> > +
>> >> > +       case DRM_FORMAT_RGBA4444:
>> >> > +               *mode = SUN4I_BACKEND_LAY_FBFMT_RGBA4444;
>> >>
>> >> The A20 manual only lists ARGB4444, not RGBA4444. There might be
>> >> some discrepancy here. We can deal with them
>> >
>> > Hmm, yes, that's weird. But I guess this would be part of porting it
>> > to the A20.
>> >
>> >> Also there are some more formats missing from the list, could you
>> >> add them as well?
>> >
>> > Which one do you refer to?
>>
>> RGB556 and RGB655.
>
> These formats are not supported by Linux yet though.

I see. Sorry for the noise.

Acked-by: Chen-Yu Tsai <wens@...e.org>

>
> Thanks,
> Maxime
>
> --
> Maxime Ripard, Free Electrons
> Embedded Linux and Kernel engineering
> http://free-electrons.com