linux-kernel - Re: [PATCH] drm/panfrost: Add GPU_PM

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Message-ID: <zdeak3e65wt2jw7n6rcskyeokmyt7cxhsrvwaeqodp2yjxw7kg@vbqza5hpnrym>
Date: Fri, 19 Dec 2025 10:01:35 +0000
From: Adrián Larumbe <adrian.larumbe@...labora.com>
To: Biju Das <biju.das.jz@...renesas.com>
Cc: "biju.das.au" <biju.das.au@...il.com>, 
	Boris Brezillon <boris.brezillon@...labora.com>, Rob Herring <robh@...nel.org>, 
	Steven Price <steven.price@....com>, 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>, 
	Geert Uytterhoeven <geert+renesas@...der.be>, "magnus.damm" <magnus.damm@...il.com>, 
	"dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, 
	"linux-renesas-soc@...r.kernel.org" <linux-renesas-soc@...r.kernel.org>, Prabhakar Mahadev Lad <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: Re: [PATCH] drm/panfrost: Add GPU_PM_RT support for RZ/G3E SoC

Hi Biju,

I'll be merging your patch. It'll be my first time as a Panfrost maintainer, so bear me with me
while I become familiar with the process.

Kind Regards,
Adrian

On 19.12.2025 09:49, Biju Das wrote:
> Hi All,
>
> > -----Original Message-----
> > From: Biju <biju.das.au@...il.com>
> > Sent: 03 December 2025 12:51
> > Subject: [PATCH] drm/panfrost: Add GPU_PM_RT support for RZ/G3E SoC
> >
> > From: Biju Das <biju.das.jz@...renesas.com>
> >
> > RZ/G3E SoC is embedded with Mali-G52 GPU system. The system hangs after STR in the following
> > condition:
> >
> > STR -> Wakeup from STR -> Unload panfrost using 'modprobe -r panfrost'.
> >
> > Fix this issue by asserting/deasserting the reset during suspend/resume.
> > Rename the variable allwinner_h616_data->default_pm_rt_data for data reuse and make it as generic GPU
> > PM runtime data.
> >
> > Signed-off-by: Biju Das <biju.das.jz@...renesas.com>
> > ---
> >  drivers/gpu/drm/panfrost/panfrost_drv.c | 5 +++--
> >  1 file changed, 3 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c
> > index 7d8c7c337606..e553f183c780 100644
> > --- a/drivers/gpu/drm/panfrost/panfrost_drv.c
> > +++ b/drivers/gpu/drm/panfrost/panfrost_drv.c
> > @@ -976,7 +976,7 @@ static const struct panfrost_compatible default_data = {
> >  	.pm_domain_names = NULL,
> >  };
> >
> > -static const struct panfrost_compatible allwinner_h616_data = {
> > +static const struct panfrost_compatible default_pm_rt_data = {
> >  	.num_supplies = ARRAY_SIZE(default_supplies) - 1,
> >  	.supply_names = default_supplies,
> >  	.num_pm_domains = 1,
> > @@ -1056,6 +1056,7 @@ static const struct of_device_id dt_match[] = {
> >  	  .data = &amlogic_data, },
> >  	{ .compatible = "amlogic,meson-g12a-mali",
> >  	  .data = &amlogic_data, },
> > +	{ .compatible = "renesas,r9a09g047-mali", .data = &default_pm_rt_data
> > +},
> >  	{ .compatible = "arm,mali-t604", .data = &default_data, },
> >  	{ .compatible = "arm,mali-t624", .data = &default_data, },
> >  	{ .compatible = "arm,mali-t628", .data = &default_data, }, @@ -1073,7 +1074,7 @@ static const
> > struct of_device_id dt_match[] = {
> >  	{ .compatible = "mediatek,mt8188-mali", .data = &mediatek_mt8188_data },
> >  	{ .compatible = "mediatek,mt8192-mali", .data = &mediatek_mt8192_data },
> >  	{ .compatible = "mediatek,mt8370-mali", .data = &mediatek_mt8370_data },
> > -	{ .compatible = "allwinner,sun50i-h616-mali", .data = &allwinner_h616_data },
> > +	{ .compatible = "allwinner,sun50i-h616-mali", .data =
> > +&default_pm_rt_data },
> >  	{}
> >  };
> >  MODULE_DEVICE_TABLE(of, dt_match);
> > --
> > 2.43.0
>
> Gentle ping.
>
> Cheers,
> Biju