linux-kernel - [PATCH v5 00/12] Panfrost: Improve and add MediaTek SoCs support

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Message-Id: <20230316102041.210269-1-angelogioacchino.delregno@collabora.com>
Date:   Thu, 16 Mar 2023 11:20:29 +0100
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     airlied@...il.com
Cc:     daniel@...ll.ch, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, steven.price@....com,
        alyssa.rosenzweig@...labora.com, matthias.bgg@...il.com,
        robh@...nel.org, dri-devel@...ts.freedesktop.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, wenst@...omium.org,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Subject: [PATCH v5 00/12] Panfrost: Improve and add MediaTek SoCs support

Changes in v5:
 - Changed minItems for power-domain-names in base schema as
   suggested by Rob

Changes in v4:
 - Refactored power-domains and power-domain-names exclusions as
   suggested by Krzysztof
 - Small changes in MT8192 bindings addition

Changes in v3:
 - Changed MT8186 bindings to declare only two power domains
 - Added a commit introducing MT8186 specific platform data to
   panfrost_drv

Changes in v2:
 - Add power-domain-names commit from Chen-Yu to the series
 - Kept sram-supply in base schema, overridden for non-MediaTek
 - Added Reviewed-by tags from Steven Price to the driver commits
   (as released in reply to v1's cover letter - thanks!)

This series adds support for new MediaTek SoCs (MT8186/MT8192/MT8195)
and improves MT8183 support: since the mtk-regulator-coupler driver
was picked, it is now useless for Panfrost to look for, and manage,
two regulators (GPU Vcore and GPU SRAM) on MediaTek;

The aforementioned driver will take care of keeping the voltage
relation (/constraints) of the two regulators on its own when a
voltage change request is sent to the Vcore, solving the old time
issue with not working DVFS on Panfrost+MediaTek (due to devfreq
supporting only single regulator).

In the specific case of MT8183, in order to not break the ABI, it
was necessary to add a new compatible for enabling DVFS.

Alyssa Rosenzweig (3):
  drm/panfrost: Increase MAX_PM_DOMAINS to 5
  drm/panfrost: Add the MT8192 GPU ID
  drm/panfrost: Add mediatek,mt8192-mali compatible

AngeloGioacchino Del Regno (9):
  dt-bindings: gpu: mali-bifrost: Split out MediaTek power-domains
    variation
  dt-bindings: gpu: mali-bifrost: Set power-domains maxItems to 5
  dt-bindings: gpu: mali-bifrost: Fix power-domain-names validation
  dt-bindings: gpu: mali-bifrost: Add sub-schema for MT8192's power
    domains
  dt-bindings: gpu: mali-bifrost: Add new MT8183 compatible
  dt-bindings: gpu: mali-bifrost: Add support for MediaTek MT8186
  dt-bindings: gpu: mali-bifrost: Add compatible for MT8195 SoC
  drm/panfrost: Add new compatible for Mali on the MT8183 SoC
  drm/panfrost: Add support for Mali on the MT8186 SoC

 .../bindings/gpu/arm,mali-bifrost.yaml        | 80 ++++++++++++++++++-
 drivers/gpu/drm/panfrost/panfrost_device.h    |  2 +-
 drivers/gpu/drm/panfrost/panfrost_drv.c       | 37 +++++++++
 drivers/gpu/drm/panfrost/panfrost_gpu.c       |  8 ++
 4 files changed, 123 insertions(+), 4 deletions(-)

-- 
2.39.2