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docs/v3d: update v3d documentation

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In order to include a reference to the Raspberry Pi 5, and that the
support for 3.3 and 4.1 got dropped.

Acked-by: Emma Anholt <emma@anholt.net>
Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25851>
This commit is contained in:
Alejandro Piñeiro 2023-10-31 23:36:48 +01:00
parent 87a673cac4
commit b509446c2c
1 changed files with 10 additions and 7 deletions
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docs/drivers/v3d.rst
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@ -5,22 +5,25 @@ Mesa's V3D graphics driver stack includes a `conformant GLES3.1
driver
<https://www.khronos.org/conformance/adopters/conformant-products/opengles#submission_882>`__
called V3D and a Vulkan graphics driver called V3DV, notably
used on the Raspberry Pi 4.
used on the Raspberry Pi 4 and Raspberry Pi 5.
The V3D Mesa drivers communicate directly with the `V3D
<https://www.kernel.org/doc/html/latest/gpu/v3d.html>`__ kernel DRM
driver for scheduling GPU commands. Additionally, on the Raspberry Pi
4, the kernel uses the VC4 DRM driver for display support, so Mesa
4 and 5, the kernel uses the VC4 DRM driver for display support, so Mesa
exposes a ``vc4_dri.so`` using the kmsro helpers to do
behind-the-scenes buffer management between the two kernel drivers,
while executing rendering on the V3D kernel module.
Initial development work was done on the Broadcom 7268 (V3D 3.3) and
7278 (V3D 4.1). Development since then has been on V3D 4.2, and
though the 3.3 and 4.1 support continues to remain in tree, it is not
tested any more. Broadcom's reference software platforms do not make
use of the open source V3D stack, but porting a particular hardware
implementation to use it would still be possible.
7278 (V3D 4.1). Development since then has been on V3D 4.2 (Raspberry
Pi 4), and V3D 7.1 (Raspberry Pi 5). When the support for V3D 7.1
landed, the support for 3.3 and 4.1 was dropped as it was not tested
anymore (see `MR#25851
<https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25851>`__)
Broadcom's reference software platforms do not make use of the open
source V3D stack, but porting a particular hardware implementation to
use it would still be possible.
Hardware Documentation
----------------------