linux-kernel - Re: [PATCH 0/3] drm/panthor: Coherency related fixes

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Message-ID: <20241030164612.42835f3c@collabora.com>
Date: Wed, 30 Oct 2024 16:46:12 +0100
From: Boris Brezillon <boris.brezillon@...labora.com>
To: Akash Goel <akash.goel@....com>
Cc: liviu.dudau@....com, steven.price@....com,
 dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
 mihail.atanassov@....com, ketil.johnsen@....com, florent.tomasin@....com,
 maarten.lankhorst@...ux.intel.com, mripard@...nel.org, tzimmermann@...e.de,
 airlied@...il.com, daniel@...ll.ch, nd@....com
Subject: Re: [PATCH 0/3] drm/panthor: Coherency related fixes

On Thu, 24 Oct 2024 15:54:29 +0100
Akash Goel <akash.goel@....com> wrote:

> This patch series contains 3 cache coherency related fixes for the
> Panthor driver.
> - The first fix, regarding the Inner-shareability, is mandatory to
>   ensure things work on all platforms (including Juno FPGA) when
>   no_coherency protocol is selected.
> - The second fix regarding the coherency feature/enable register is
>   required to avoid potential misalignment on certain platforms.
> - The third fix, regarding the potential overwrite of buffer objects,
>   has been prepared speculatively & it may not be required in practice.
>   Please provide feedback on it.
> 
> Akash Goel (3):
>   drm/panthor: Update memattr programing to align with GPU spec
>   drm/panthor: Explicitly set the coherency mode
>   drm/panthor: Prevent potential overwrite of buffer objects

For some reason, our replies didn't make it to patchwork [1], meaning I
don't have the R-b tags when I apply the patch. Could you send a v2
with the R-bs added, so I can at least apply the first two patches to
drm-misc-fixes?

[1]https://patchwork.freedesktop.org/series/140498/

> 
>  drivers/gpu/drm/panthor/panthor_device.c | 22 ++++++++++++++++++-
>  drivers/gpu/drm/panthor/panthor_gem.h    | 10 +++++++++
>  drivers/gpu/drm/panthor/panthor_gpu.c    |  9 ++++++++
>  drivers/gpu/drm/panthor/panthor_mmu.c    | 28 +++++++++++++++++-------
>  4 files changed, 60 insertions(+), 9 deletions(-)
>