linux-kernel - Re: [PATCH v5 8/8] drm/imagination: Enable PowerVR driver for RISC-V

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Message-ID: <CAMRc=MdXmtZ3EbPDSGQeVaH40oZS7yc8MSMO2TbHza+F2HnBng@mail.gmail.com>
Date: Wed, 18 Jun 2025 15:44:35 +0200
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Michal Wilczynski <m.wilczynski@...sung.com>
Cc: Drew Fustini <drew@...7.com>, 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>, 
	Philipp Zabel <p.zabel@...gutronix.de>, Frank Binns <frank.binns@...tec.com>, 
	Matt Coster <matt.coster@...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>, 
	linux-riscv@...ts.infradead.org, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org, 
	dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH v5 8/8] drm/imagination: Enable PowerVR driver for RISC-V

On Wed, Jun 18, 2025 at 12:22 PM Michal Wilczynski
<m.wilczynski@...sung.com> 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.
>
> Add a dependency on MMU to fix a build warning on RISC-V configurations
> without an MMU and enable COMPILE_TEST to improve build coverage.
>
> Reviewed-by: Ulf Hansson <ulf.hansson@...aro.org>
> Signed-off-by: Michal Wilczynski <m.wilczynski@...sung.com>
> ---
>  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 5f9fff43d6baadc42ebf48d91729bfbf27e06caa..48fd31c031628c70b1e0952271baccf7f4694810 100644
> --- a/drivers/gpu/drm/imagination/Kconfig
> +++ b/drivers/gpu/drm/imagination/Kconfig
> @@ -3,9 +3,10 @@
>
>  config DRM_POWERVR
>         tristate "Imagination Technologies PowerVR (Series 6 and later) & IMG Graphics"
> -       depends on ARM64
> +       depends on (ARM64 || RISCV) || COMPILE_TEST

Some maintainers could say that the COMPILE_TEST bit should be a
separate commit but it's typically fine with me.

>         depends on DRM
>         depends on PM
> +       depends on MMU
>         select DRM_EXEC
>         select DRM_GEM_SHMEM_HELPER
>         select DRM_SCHED
>
> --
> 2.34.1
>

Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>