linux-kernel - [PATCH v2 0/8] drm/panthor: Add support for Mali-G1 GPUs

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Message-ID: <20251024202117.3241292-1-karunika.choo@arm.com>
Date: Fri, 24 Oct 2025 21:21:09 +0100
From: Karunika Choo <karunika.choo@....com>
To: dri-devel@...ts.freedesktop.org
Cc: nd@....com,
	Boris Brezillon <boris.brezillon@...labora.com>,
	Steven Price <steven.price@....com>,
	Liviu Dudau <liviu.dudau@....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>,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2 0/8] drm/panthor: Add support for Mali-G1 GPUs

This patch series extends the Panthor driver with basic support for
Mali-G1 GPUs.

The v14 architecture introduces several hardware and register-level
changes compared to prior GPUs. This series adds the necessary
architecture-specific support infrastructure, power control and reset
handling for Mali-G1 GPUs.

Patch Breakdown:
[Patch 1-2]:  Refactor panthor_hw to introduce architecture-specific
              hooks and abstractions to support the v14 architecture.
              These patches introduce architecture-specific HW binding
              for function pointers.
[Patch 3-5]:  Adds basic L2 power on/off and soft reset support for the
              PWR_CONTROL block introduced in v14.
[Patch 6]:    Update MCU halt and warm boot operations to reflect the
              GLB_REQ.STATE changes in v14. This ensures that the MCU is
              properly halted and the correct operations are performed
              on warm boot depending on the FW version.
[Patch 7]:    Align endpoint_req with changes introduced in v14, where
              the register is widened to 64-bit and shifed down by
              4-bytes. This patch adds the necessary infrastructure to
              discern the correct endpoint_req register to use.
[Patch 8]:    Enables Mali-G1 support on Panthor by adding HW bindings
              for v14 architecture, product names and path to FW binary.

v2:
 * Merged GPU_ID refactoring patch with the arch-specific panthor_hw
   binding patch (formerly PATCH 01/10 and PATCH 02/10).
 * Dropped panthor_hw feature bitmap patch in favor of functions that
   performs the relevant architecture version checks.
 * Fixed kernel test bot warnings.
 * Replaced function pointer accessor MACROs with static inline
   functions.
 * Refined power control logic, removed unnecessary checks and redundant
   stubs.
 * Replaced explicit CSG_IFACE_VERSION checks with functions describing
   the feature being checked for.
 * General readability improvements, more consistent error handling,
   behaviour clarifications, and formatting fixes.
 * Link to v1: https://lore.kernel.org/all/20251014094337.1009601-1-karunika.choo@arm.com/

Karunika Choo (8):
  drm/panthor: Add arch-specific panthor_hw binding
  drm/panthor: Add architecture-specific function operations
  drm/panthor: Introduce panthor_pwr API and power control framework
  drm/panthor: Implement L2 power on/off via PWR_CONTROL
  drm/panthor: Implement soft reset via PWR_CONTROL
  drm/panthor: Support GLB_REQ.STATE field for Mali-G1 GPUs
  drm/panthor: Support 64-bit endpoint_req register for Mali-G1
  drm/panthor: Add support for Mali-G1 GPUs

 drivers/gpu/drm/panthor/Makefile         |   1 +
 drivers/gpu/drm/panthor/panthor_device.c |  19 +-
 drivers/gpu/drm/panthor/panthor_device.h |  24 +
 drivers/gpu/drm/panthor/panthor_fw.c     | 130 +++++-
 drivers/gpu/drm/panthor/panthor_fw.h     |  32 +-
 drivers/gpu/drm/panthor/panthor_gpu.c    |  11 +-
 drivers/gpu/drm/panthor/panthor_gpu.h    |   1 +
 drivers/gpu/drm/panthor/panthor_hw.c     | 113 ++++-
 drivers/gpu/drm/panthor/panthor_hw.h     |  26 ++
 drivers/gpu/drm/panthor/panthor_pwr.c    | 548 +++++++++++++++++++++++
 drivers/gpu/drm/panthor/panthor_pwr.h    |  23 +
 drivers/gpu/drm/panthor/panthor_regs.h   |  79 ++++
 drivers/gpu/drm/panthor/panthor_sched.c  |  21 +-
 13 files changed, 987 insertions(+), 41 deletions(-)
 create mode 100644 drivers/gpu/drm/panthor/panthor_pwr.c
 create mode 100644 drivers/gpu/drm/panthor/panthor_pwr.h

--
2.49.0