linux-kernel - Re: [PATCH v4 0/8] drm/panthor: Add support for Mali-G1 GPUs

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Message-ID: <c80da36c-84e5-4a1c-a467-3cc9c46bf956@arm.com>
Date: Tue, 25 Nov 2025 13:47:55 +0000
From: Karunika Choo <karunika.choo@....com>
To: Steven Price <steven.price@....com>, dri-devel@...ts.freedesktop.org
Cc: nd@....com, Boris Brezillon <boris.brezillon@...labora.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: Re: [PATCH v4 0/8] drm/panthor: Add support for Mali-G1 GPUs

On 14/11/2025 16:33, Steven Price wrote:
> Hi Karunika,
> 
> This series doesn't seem to cleanly apply on drm-misc-next (and I can't
> figure out what base you used). Would you mind doing a rebase and resend?
> 
> Thanks,
> Steve
> 

Hi Steve,

I've rebased on top of ac364014 and sent out a v5.
Hopefully it works.

v5: https://lore.kernel.org/all/20251125125548.3282320-1-karunika.choo@arm.com/

Kind regards,
karunika Choo

> On 07/11/2025 14:24, Karunika Choo wrote:
>> 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.
>>
>> v4:
>>  * Fixed include and forward declaration issues.
>>  * Addressed code format issues.
>>  * Picked up R-bs from Steve.
>>  * Link to v3: https://lore.kernel.org/all/20251027161334.854650-1-karunika.choo@arm.com/
>> v3:
>>  * Updated include logic to enable static inline functions in
>>    panthor_hw.h for function pointers and feature checks.
>>  * Fixed missed replacement of CSF_IFACE_VERSION check with
>>    panthor_fw_has_glb_state() check.
>>  * Link to v2: https://lore.kernel.org/all/20251024202117.3241292-1-karunika.choo@arm.com/
>> 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 |  18 +-
>>  drivers/gpu/drm/panthor/panthor_device.h |   8 +
>>  drivers/gpu/drm/panthor/panthor_fw.c     | 131 +++++-
>>  drivers/gpu/drm/panthor/panthor_fw.h     |  32 +-
>>  drivers/gpu/drm/panthor/panthor_gpu.c    |  12 +-
>>  drivers/gpu/drm/panthor/panthor_gpu.h    |   1 +
>>  drivers/gpu/drm/panthor/panthor_hw.c     | 107 ++++-
>>  drivers/gpu/drm/panthor/panthor_hw.h     |  47 +-
>>  drivers/gpu/drm/panthor/panthor_pwr.c    | 549 +++++++++++++++++++++++
>>  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, 989 insertions(+), 40 deletions(-)
>>  create mode 100644 drivers/gpu/drm/panthor/panthor_pwr.c
>>  create mode 100644 drivers/gpu/drm/panthor/panthor_pwr.h
>>
>> --
>> 2.49.0
>>
>