linux-kernel - Re: [PATCH 2/2] drm/panfrost: add h616 compatible string

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Message-ID: <20250331115729.33e54615@donnerap.manchester.arm.com>
Date: Mon, 31 Mar 2025 11:57:29 +0100
From: Andre Przywara <andre.przywara@....com>
To: Steven Price <steven.price@....com>
Cc: Philippe Simons <simons.philippe@...il.com>, Boris Brezillon
 <boris.brezillon@...labora.com>, Rob Herring <robh@...nel.org>, Maarten
 Lankhorst <maarten.lankhorst@...ux.intel.com>, Maxime Ripard
 <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, David Airlie
 <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, Philipp Zabel
 <p.zabel@...gutronix.de>, <dri-devel@...ts.freedesktop.org>,
 <linux-kernel@...r.kernel.org>, <linux-sunxi@...ts.linux.dev>, Jernej
 Škrabec <jernej.skrabec@...il.com>
Subject: Re: [PATCH 2/2] drm/panfrost: add h616 compatible string

On Mon, 31 Mar 2025 11:32:58 +0100
Steven Price <steven.price@....com> wrote:

Hi Steven,

thanks for having a look!

> On 12/03/2025 23:23, Philippe Simons wrote:
> > Tie the Allwinner compatible string to the two features bits that will
> > toggle the clocks and the reset line whenever the power domain is changing
> > state.  
> 
> This looks fine, but we need the new compatible string to be documented
> in the bindings:
> 
> Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml
> 
> I'm not sure what the situation is for the device tree for this
> platform, but it would be good to get that all sorted before we merge
> the compatible into panfrost.

The binding addition was sent earlier, as part of my power-domain driver
series:
https://lore.kernel.org/linux-sunxi/20250221005802.11001-1-andre.przywara@arm.com/T/#m083df99cf34ddfd06a6a4b8fbb49636a51b05112

Rob took that one already, and it landed in Linus' tree last week, so
that would be covered.

Cheers,
Andre

> 
> Thanks,
> Steve
> 
> > Signed-off-by: Philippe Simons <simons.philippe@...il.com>
> > ---
> >  drivers/gpu/drm/panfrost/panfrost_drv.c | 8 ++++++++
> >  1 file changed, 8 insertions(+)
> > 
> > diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c
> > index 0f3935556ac7..f13743fe6bad 100644
> > --- a/drivers/gpu/drm/panfrost/panfrost_drv.c
> > +++ b/drivers/gpu/drm/panfrost/panfrost_drv.c
> > @@ -776,6 +776,13 @@ static const struct panfrost_compatible default_data = {
> >  	.pm_domain_names = NULL,
> >  };
> >  
> > +static const struct panfrost_compatible allwinner_h616_data = {
> > +	.num_supplies = ARRAY_SIZE(default_supplies) - 1,
> > +	.supply_names = default_supplies,
> > +	.num_pm_domains = 1,
> > +	.pm_features = BIT(GPU_PM_RT_CLK_DIS) | BIT(GPU_PM_RT_RST_ASRT),
> > +};
> > +
> >  static const struct panfrost_compatible amlogic_data = {
> >  	.num_supplies = ARRAY_SIZE(default_supplies) - 1,
> >  	.supply_names = default_supplies,
> > @@ -859,6 +866,7 @@ static const struct of_device_id dt_match[] = {
> >  	{ .compatible = "mediatek,mt8186-mali", .data = &mediatek_mt8186_data },
> >  	{ .compatible = "mediatek,mt8188-mali", .data = &mediatek_mt8188_data },
> >  	{ .compatible = "mediatek,mt8192-mali", .data = &mediatek_mt8192_data },
> > +	{ .compatible = "allwinner,sun50i-h616-mali", .data = &allwinner_h616_data },
> >  	{}
> >  };
> >  MODULE_DEVICE_TABLE(of, dt_match);  
>