linux-kernel - [PATCH 0/5] drm/panfrost: add Amlogic integration quirks

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Date:   Tue,  8 Sep 2020 17:18:48 +0200
From:   Neil Armstrong <narmstrong@...libre.com>
To:     robh@...nel.org, tomeu.vizoso@...labora.com, steven.price@....com,
        alyssa.rosenzweig@...labora.com
Cc:     dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-amlogic@...ts.infradead.org,
        Neil Armstrong <narmstrong@...libre.com>
Subject: [PATCH 0/5] drm/panfrost: add Amlogic integration quirks

The T820, G31 & G52 GPUs integrated by Amlogic in the respective GXM, G12A/SM1 & G12B
SoCs needs a quirk in the PWR registers at the GPU reset time.

The coherency integration of the IOMMU in the Mali-G52 found in the Amlogic G12B SoCs
is broken and leads to constant and random faults from the IOMMU.

This serie adds the necessary quirks for the Amlogic integrated GPUs only.

Neil Armstrong (5):
  iommu/io-pgtable-arm: Add BROKEN_NS quirk to disable shareability on
    ARM LPAE
  drm/panfrost: add support specifying pgtbl quirks
  drm/panfrost: add support for reset quirk
  drm/panfrost: add amlogic reset quirk callback
  drm/panfrost: add Amlogic GPU integration quirks

 drivers/gpu/drm/panfrost/panfrost_device.h |  6 ++++++
 drivers/gpu/drm/panfrost/panfrost_drv.c    | 18 ++++++++++++++++++
 drivers/gpu/drm/panfrost/panfrost_gpu.c    | 17 +++++++++++++++++
 drivers/gpu/drm/panfrost/panfrost_gpu.h    |  2 ++
 drivers/gpu/drm/panfrost/panfrost_mmu.c    |  1 +
 drivers/gpu/drm/panfrost/panfrost_regs.h   |  3 +++
 drivers/iommu/io-pgtable-arm.c             |  7 ++++---
 include/linux/io-pgtable.h                 |  4 ++++
 8 files changed, 55 insertions(+), 3 deletions(-)

-- 
2.22.0