linux-kernel - Re: [PATCH v9 00/20] Imagination Technologies PowerVR DRM driver

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Date:   Wed, 22 Nov 2023 20:34:25 +0100
From:   Maxime Ripard <mripard@...nel.org>
To:     Donald Robson <donald.robson@...tec.com>
Cc:     dri-devel@...ts.freedesktop.org, frank.binns@...tec.com,
        matt.coster@...tec.com, boris.brezillon@...labora.com,
        faith.ekstrand@...labora.com, airlied@...il.com, daniel@...ll.ch,
        maarten.lankhorst@...ux.intel.com, tzimmermann@...e.de, afd@...com,
        hns@...delico.com, matthew.brost@...el.com,
        christian.koenig@....com, luben.tuikov@....com, dakr@...hat.com,
        linux-kernel@...r.kernel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
        devicetree@...r.kernel.org, corbet@....net,
        linux-doc@...r.kernel.org
Subject: Re: [PATCH v9 00/20] Imagination Technologies PowerVR DRM driver

Hi,

On Wed, Nov 22, 2023 at 04:34:21PM +0000, Donald Robson wrote:
> This patch series adds the initial DRM driver for Imagination Technologies PowerVR
> GPUs, starting with those based on our Rogue architecture. It's worth pointing
> out that this is a new driver, written from the ground up, rather than a
> refactored version of our existing downstream driver (pvrsrvkm).
> 
> This new DRM driver supports:
> - GEM shmem allocations
> - dma-buf / PRIME
> - Per-context userspace managed virtual address space
> - DRM sync objects (binary and timeline)
> - Power management suspend / resume
> - GPU job submission (geometry, fragment, compute, transfer)
> - META firmware processor
> - MIPS firmware processor
> - GPU hang detection and recovery
> 
> Currently our main focus is on the AXE-1-16M GPU. Testing so far has been done
> using a TI SK-AM62 board (AXE-1-16M GPU). The driver has also been confirmed to
> work on the BeaglePlay board. Firmware for the AXE-1-16M can be found here:
> https://gitlab.freedesktop.org/frankbinns/linux-firmware/-/tree/powervr
> 
> A Vulkan driver that works with our downstream kernel driver has already been
> merged into Mesa [1][2]. Support for this new DRM driver is being maintained in
> a merge request [3], with the branch located here:
> https://gitlab.freedesktop.org/frankbinns/mesa/-/tree/powervr-winsys
> 
> Vulkan driver links referred to above:
> [1] https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/15243
> [2] https://gitlab.freedesktop.org/mesa/mesa/-/tree/main/src/imagination/vulkan
> [3] https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/15507
> 
> Job stream formats are documented at:
> https://gitlab.freedesktop.org/mesa/mesa/-/blob/f8d2b42ae65c2f16f36a43e0ae39d288431e4263/src/imagination/csbgen/rogue_kmd_stream.xml
> 
> The Vulkan driver is progressing towards Vulkan 1.0. The current combination of this
> kernel driver with the Mesa Vulkan driver (powervr-mesa-next branch) successfully
> completes Vulkan CTS 1.3.4.1 in our local runs. The driver is expected to pass the
> Khronos Conformance Process once the submission is made.
> 
> The code in this patch series, along with the needed dts changes can be found here:
> https://gitlab.freedesktop.org/frankbinns/powervr/-/tree/dev/v9_dts
> The full development history can be found here:
> https://gitlab.freedesktop.org/frankbinns/powervr/-/tree/powervr-next

I just merged all the patches to drm-misc-next.

Congrats :)

Maxime

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