linux-kernel - Re: [PATCH v3 09/15] drm/sun4i: Add A83T support

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Message-ID: <1729482.Mgh5nx8BIs@jernej-laptop>
Date:   Wed, 06 Dec 2017 17:37:47 +0100
From:   Jernej Škrabec <jernej.skrabec@...l.net>
To:     Maxime Ripard <maxime.ripard@...e-electrons.com>
Cc:     Daniel Vetter <daniel.vetter@...el.com>,
        David Airlie <airlied@...ux.ie>, Chen-Yu Tsai <wens@...e.org>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Mark Rutland <mark.rutland@....com>,
        Rob Herring <robh+dt@...nel.org>,
        linux-arm-kernel@...ts.infradead.org, plaes@...es.org,
        icenowy@...c.io,
        Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v3 09/15] drm/sun4i: Add A83T support

Hi,

Dne torek, 05. december 2017 ob 16:42:55 CET je Jernej Škrabec napisal(a):
> Hi Maxime,
> 
> Dne torek, 05. december 2017 ob 16:10:21 CET je Maxime Ripard napisal(a):
> > Add support for the A83T display pipeline.
> > 
> > Reviewed-by: Chen-Yu Tsai <wens@...e.org>
> > Signed-off-by: Maxime Ripard <maxime.ripard@...e-electrons.com>
> > ---
> > 
> >  drivers/gpu/drm/sun4i/sun4i_drv.c   |  1 +
> >  drivers/gpu/drm/sun4i/sun4i_tcon.c  |  5 +++++
> >  drivers/gpu/drm/sun4i/sun8i_mixer.c |  9 +++++++++
> >  3 files changed, 15 insertions(+)
> > 
> > diff --git a/drivers/gpu/drm/sun4i/sun4i_drv.c
> > b/drivers/gpu/drm/sun4i/sun4i_drv.c index 49215d91c853..6f5e721b545e
> > 100644
> > --- a/drivers/gpu/drm/sun4i/sun4i_drv.c
> > +++ b/drivers/gpu/drm/sun4i/sun4i_drv.c
> > @@ -347,6 +347,7 @@ static const struct of_device_id sun4i_drv_of_table[]
> > =
> > { { .compatible = "allwinner,sun6i-a31s-display-engine" },
> > 
> >  	{ .compatible = "allwinner,sun7i-a20-display-engine" },
> >  	{ .compatible = "allwinner,sun8i-a33-display-engine" },
> > 
> > +	{ .compatible = "allwinner,sun8i-a83t-display-engine" },
> > 
> >  	{ .compatible = "allwinner,sun8i-v3s-display-engine" },
> >  	{ }
> >  
> >  };
> > 
> > diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c
> > b/drivers/gpu/drm/sun4i/sun4i_tcon.c index 92f4738101e6..9b757450555f
> > 100644
> > --- a/drivers/gpu/drm/sun4i/sun4i_tcon.c
> > +++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c
> > @@ -1132,6 +1132,10 @@ static const struct sun4i_tcon_quirks
> > sun8i_a33_quirks = { .has_lvds_pll		= true,
> > 
> >  };
> > 
> > +static const struct sun4i_tcon_quirks sun8i_a83t_lcd_quirks = {
> > +	/* nothing is supported */
> > +};
> > +
> > 
> >  static const struct sun4i_tcon_quirks sun8i_v3s_quirks = {
> >  
> >  	/* nothing is supported */
> >  
> >  };
> > 
> > @@ -1144,6 +1148,7 @@ const struct of_device_id sun4i_tcon_of_table[] = {
> > 
> >  	{ .compatible = "allwinner,sun6i-a31s-tcon", .data = 
&sun6i_a31s_quirks
> >  	},
> > 
> > { .compatible = "allwinner,sun7i-a20-tcon", .data = &sun7i_a20_quirks }, {
> > .compatible = "allwinner,sun8i-a33-tcon", .data = &sun8i_a33_quirks }, +	
{
> > .compatible = "allwinner,sun8i-a83t-tcon-lcd", .data =
> > &sun8i_a83t_lcd_quirks }, { .compatible = "allwinner,sun8i-v3s-tcon",
> > .data
> > = &sun8i_v3s_quirks }, { }
> > 
> >  };
> > 
> > diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.c
> > b/drivers/gpu/drm/sun4i/sun8i_mixer.c index ff235e3228ce..6829bec4ba68
> > 100644
> > --- a/drivers/gpu/drm/sun4i/sun8i_mixer.c
> > +++ b/drivers/gpu/drm/sun4i/sun8i_mixer.c
> > @@ -477,6 +477,11 @@ static int sun8i_mixer_remove(struct platform_device
> > *pdev) return 0;
> > 
> >  }
> > 
> > +static const struct sun8i_mixer_cfg sun8i_a83t_mixer_cfg = {
> > +	.vi_num = 1,
> > +	.ui_num = 3,
> > +};
> > +
> 
> I think you should expand that structure with:
> .ccsc = 0,
> .scaler_mask = 0xf,
> .mod_rate = 150000000,

I guess you could set higher clock if CLK_SET_RATE_PARENT flag is set to de_clk 
in A83T CCU driver. BSP sets it to 500 MHz, which is a bit high...

Best regards,
Jernej

> 
> Best regards,
> Jernej
> 
> >  static const struct sun8i_mixer_cfg sun8i_v3s_mixer_cfg = {
> >  
> >  	.vi_num = 2,
> >  	.ui_num = 1,
> > 
> > @@ -487,6 +492,10 @@ static const struct sun8i_mixer_cfg
> > sun8i_v3s_mixer_cfg = {
> > 
> >  static const struct of_device_id sun8i_mixer_of_table[] = {
> >  
> >  	{
> > 
> > +		.compatible = "allwinner,sun8i-a83t-de2-mixer-0",
> > +		.data = &sun8i_a83t_mixer_cfg,
> > +	},
> > +	{
> > 
> >  		.compatible = "allwinner,sun8i-v3s-de2-mixer",
> >  		.data = &sun8i_v3s_mixer_cfg,
> >  	
> >  	},
> > 
> > --
> > git-series 0.9.1