linux-kernel - Re: [PATCH v12 4/4] drm/imagination: Enable PowerVR driver for RISC-V

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Message-ID: <b70ec62f-e842-4f70-a4fd-b11afcfe46a8@imgtec.com>
Date: Thu, 21 Aug 2025 09:06:01 +0000
From: Matt Coster <Matt.Coster@...tec.com>
To: Michal Wilczynski <m.wilczynski@...sung.com>
CC: Guo Ren <guoren@...nel.org>, Fu Wei <wefu@...hat.com>,
        Rob Herring
	<robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
	<conor+dt@...nel.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Philipp Zabel
	<p.zabel@...gutronix.de>,
        Frank Binns <Frank.Binns@...tec.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>,
        Paul Walmsley
	<paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou
	<aou@...s.berkeley.edu>, Alexandre Ghiti <alex@...ti.fr>,
        Ulf Hansson
	<ulf.hansson@...aro.org>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Drew
 Fustini <fustini@...nel.org>,
        Bartosz Golaszewski
	<bartosz.golaszewski@...aro.org>,
        "linux-riscv@...ts.infradead.org"
	<linux-riscv@...ts.infradead.org>,
        "devicetree@...r.kernel.org"
	<devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>,
        "linux-pm@...r.kernel.org"
	<linux-pm@...r.kernel.org>,
        "dri-devel@...ts.freedesktop.org"
	<dri-devel@...ts.freedesktop.org>
Subject: Re: [PATCH v12 4/4] drm/imagination: Enable PowerVR driver for RISC-V

On 20/08/2025 09:55, Michal Wilczynski wrote:
> Several RISC-V boards feature Imagination GPUs that are compatible with
> the PowerVR driver. An example is the IMG BXM-4-64 GPU on the Lichee Pi
> 4A board. This commit adjusts the driver's Kconfig dependencies to allow
> the PowerVR driver to be compiled on the RISC-V architecture.
> 
> By enabling compilation on RISC-V, we expand support for these GPUs,
> providing graphics acceleration capabilities and enhancing hardware
> compatibility on RISC-V platforms.
> 
> The RISC-V support is restricted to 64-bit systems (RISCV && 64BIT) as
> the driver currently has an implicit dependency on a 64-bit platform.
> 
> Add a dependency on MMU to fix a build warning on RISC-V configurations
> without an MMU.
> 
> Reviewed-by: Ulf Hansson <ulf.hansson@...aro.org>
> Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> Signed-off-by: Michal Wilczynski <m.wilczynski@...sung.com>

Reviewed-by: Matt Coster <matt.coster@...tec.com>

Cheers,
Matt

> ---
>  drivers/gpu/drm/imagination/Kconfig | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/imagination/Kconfig b/drivers/gpu/drm/imagination/Kconfig
> index 3bfa2ac212dccb73c53bdc2bc259bcba636e7cfc..682dd2633d0c012df18d0f7144d029b67a14d241 100644
> --- a/drivers/gpu/drm/imagination/Kconfig
> +++ b/drivers/gpu/drm/imagination/Kconfig
> @@ -3,8 +3,9 @@
>  
>  config DRM_POWERVR
>  	tristate "Imagination Technologies PowerVR (Series 6 and later) & IMG Graphics"
> -	depends on ARM64
> +	depends on (ARM64 || RISCV && 64BIT)
>  	depends on DRM
> +	depends on MMU
>  	depends on PM
>  	select DRM_EXEC
>  	select DRM_GEM_SHMEM_HELPER
> 


-- 
Matt Coster
E: matt.coster@...tec.com


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