linux-kernel - [PATCH v3 0/3] drm/panfrost: Fix poweroff and sync IRQs for suspend

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Message-ID: <20231201104027.35273-1-angelogioacchino.delregno@collabora.com>
Date:   Fri,  1 Dec 2023 11:40:24 +0100
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     boris.brezillon@...labora.com
Cc:     robh@...nel.org, steven.price@....com,
        maarten.lankhorst@...ux.intel.com, mripard@...nel.org,
        tzimmermann@...e.de, airlied@...il.com, daniel@...ll.ch,
        angelogioacchino.delregno@...labora.com,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        kernel@...labora.com, m.szyprowski@...sung.com,
        krzysztof.kozlowski@...aro.org
Subject: [PATCH v3 0/3] drm/panfrost: Fix poweroff and sync IRQs for suspend

Changes in v3:
 - Removed useless GPU_INT_CLEAR write in suspend path
 - Changed to clear suspend bits in job/mmu reset path

This series contains a fast fix for the basic GPU poweroff functionality
and goes further by implementing interrupt masking and synchronization
before suspend.

For more information, please look at the conversation at [1], which
explains the regression seen with the poweroff commit and the initial
approaches taken to solve that.

Cheers!

[1]: https://lore.kernel.org/all/20231123095320.41433-1-angelogioacchino.delregno@collabora.com/

AngeloGioacchino Del Regno (3):
  drm/panfrost: Ignore core_mask for poweroff and disable PWRTRANS irq
  drm/panfrost: Add gpu_irq, mmu_irq to struct panfrost_device
  drm/panfrost: Synchronize and disable interrupts before powering off

 drivers/gpu/drm/panfrost/panfrost_device.c |  3 +++
 drivers/gpu/drm/panfrost/panfrost_device.h |  9 +++++++
 drivers/gpu/drm/panfrost/panfrost_gpu.c    | 28 ++++++++++++++-------
 drivers/gpu/drm/panfrost/panfrost_gpu.h    |  1 +
 drivers/gpu/drm/panfrost/panfrost_job.c    | 20 ++++++++++++---
 drivers/gpu/drm/panfrost/panfrost_job.h    |  1 +
 drivers/gpu/drm/panfrost/panfrost_mmu.c    | 29 ++++++++++++++++------
 drivers/gpu/drm/panfrost/panfrost_mmu.h    |  1 +
 8 files changed, 72 insertions(+), 20 deletions(-)

-- 
2.43.0