linux-kernel - Re: [PATCH 12/17] drm/sun4i: Add CCSC property to DE2 configuration

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Message-ID: <20171128204457.gvqjskiw7kruw24v@flea.home>
Date:   Tue, 28 Nov 2017 21:44:57 +0100
From:   Maxime Ripard <maxime.ripard@...e-electrons.com>
To:     Jernej Skrabec <jernej.skrabec@...l.net>
Cc:     wens@...e.org, airlied@...ux.ie, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org, icenowy@...c.io,
        linux-sunxi@...glegroups.com
Subject: Re: [PATCH 12/17] drm/sun4i: Add CCSC property to DE2 configuration

On Mon, Nov 27, 2017 at 09:57:45PM +0100, Jernej Skrabec wrote:
> Base addresses of channel output CSC (CCSC) depends whether mixer in
> question is first or second and if it is second, if supports VEP or not.
> This new property will tell which set of base addresses to take.
> 
> 0 - first mixer or second mixer with VEP support
> 1 - second mixer without VEP support
> 
> Signed-off-by: Jernej Skrabec <jernej.skrabec@...l.net>
> ---
>  drivers/gpu/drm/sun4i/sun8i_mixer.c | 1 +
>  drivers/gpu/drm/sun4i/sun8i_mixer.h | 1 +
>  2 files changed, 2 insertions(+)
> 
> diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.c b/drivers/gpu/drm/sun4i/sun8i_mixer.c
> index 7c9c87a0535b..2276eff8798d 100644
> --- a/drivers/gpu/drm/sun4i/sun8i_mixer.c
> +++ b/drivers/gpu/drm/sun4i/sun8i_mixer.c
> @@ -622,6 +622,7 @@ static const struct sun8i_mixer_cfg sun8i_v3s_mixer_cfg = {
>  	.vi_num = 2,
>  	.ui_num = 1,
>  	.scaler_mask = 0x3,
> +	.ccsc = 0,
>  };
>  
>  static const struct of_device_id sun8i_mixer_of_table[] = {
> diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.h b/drivers/gpu/drm/sun4i/sun8i_mixer.h
> index 355a45e6cfb4..4fcf1653e345 100644
> --- a/drivers/gpu/drm/sun4i/sun8i_mixer.h
> +++ b/drivers/gpu/drm/sun4i/sun8i_mixer.h
> @@ -136,6 +136,7 @@ struct sun8i_mixer_cfg {
>  	int		vi_num;
>  	int		ui_num;
>  	int		scaler_mask;
> +	int		ccsc;

Having some documentation for that one would be great too.

Thanks!
Maxime

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

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