linux-kernel - [PATCH 0/6] drm/imagination: Introduce hardware support check

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Message-ID: <20260113-device-support-info-v1-0-91e5db7f7294@imgtec.com>
Date: Tue, 13 Jan 2026 10:16:38 +0000
From: Matt Coster <matt.coster@...tec.com>
To: 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>
CC: Frank Binns <frank.binns@...tec.com>,
        Brajesh Gupta
	<brajesh.gupta@...tec.com>,
        Alessio Belle <alessio.belle@...tec.com>,
        Alexandru Dadu <alexandru.dadu@...tec.com>,
        Matt Coster
	<matt.coster@...tec.com>,
        <dri-devel@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH 0/6] drm/imagination: Introduce hardware support check

We're seeing an influx of contributions to add support for lots of
different hardware containing Imagination GPUs, and for that we're
incredibly grateful.

Out of an abundance of caution, let's mark anything with intial support
that isn't yet reasonably widely tested as "experimental".

This serves two goals:
 - Don't accidentally declare that hardware with early support is usable
   without sufficient testing.
 - Allow for future breaking changes that would normally not be allowed
   (limited to this experimental hardware).

Here's a quick breakdown of the series:
 - P1-3: General cleanup & other parameter/debugfs-related enhancements.
 - P4: Introduce a module parameter to override the detected gpuid,
       which is useful for testing.
 - P5: Add KUnit infrastructure to the driver for the first time, to
       validate the error-prone task of parsing a gpuid from a string.
 - P6: Introduce the titular check.

Many of the earlier changes could go in on their own, but are not
critical fixes and would all land in the -next tree anyway so it seems
pointless to separate them from the context of the later changes.

Signed-off-by: Matt Coster <matt.coster@...tec.com>
---
Alexandru Dadu (1):
      drm/imagination: Add gpuid module parameter

Matt Coster (5):
      drm/imagination: Simplify module parameters
      drm/imagination: Validate fw trace group_mask
      drm/imagination: Load FW trace config at init
      drm/imagination: KUnit test for pvr_gpuid_decode_string()
      drm/imagination: Warn or error on unsupported hardware

 drivers/gpu/drm/imagination/Kconfig        |  12 ++
 drivers/gpu/drm/imagination/Makefile       |   3 +-
 drivers/gpu/drm/imagination/pvr_debugfs.c  |   2 -
 drivers/gpu/drm/imagination/pvr_device.c   | 200 ++++++++++++++++++++++++++---
 drivers/gpu/drm/imagination/pvr_device.h   |  24 ++--
 drivers/gpu/drm/imagination/pvr_fw_trace.c | 125 +++++++++++++++---
 drivers/gpu/drm/imagination/pvr_fw_trace.h |   3 -
 drivers/gpu/drm/imagination/pvr_params.c   | 147 ---------------------
 drivers/gpu/drm/imagination/pvr_params.h   |  72 -----------
 drivers/gpu/drm/imagination/pvr_test.c     |  73 +++++++++++
 10 files changed, 389 insertions(+), 272 deletions(-)
---
base-commit: 4a768c544f64eaa2fc7cfa91e46f43aa4aad0c40
change-id: 20260107-device-support-info-f16d81b672d5