linux-kernel - [PATCH 0/4] Mediatek DRM driver detect CMDQ execution timeout by vblank IRQ

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Date:   Mon, 28 Sep 2020 07:04:18 +0800
From:   Chun-Kuang Hu <chunkuang.hu@...nel.org>
To:     Jassi Brar <jassisinghbrar@...il.com>,
        Matthias Brugger <matthias.bgg@...il.com>
Cc:     linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org,
        Chun-Kuang Hu <chunkuang.hu@...nel.org>
Subject: [PATCH 0/4] Mediatek DRM driver detect CMDQ execution timeout by vblank IRQ

CMDQ helper provide timer to detect execution timeout, but DRM driver
could have a better way to detect execution timeout by vblank IRQ.
For DRM, CMDQ command should execute in vblank, so if it fail to
execute in next 2 vblank, timeout happen. Even though we could
calculate time between 2 vblank and use timer to delect, this would
make things more complicated.

This introduce a series refinement for CMDQ mailbox controller and CMDQ
helper. Remove timer handler in helper function because different
client have different way to detect timeout. Use standard mailbox
callback instead of proprietary one to get the necessary data
in callback function. Remove struct cmdq_client to access client
instance data by struct mbox_client.

Chun-Kuang Hu (4):
  soc / drm: mediatek: cmdq: Remove timeout handler in helper function
  mailbox / soc / drm: mediatek: Use mailbox rx_callback instead of
    cmdq_task_cb
  mailbox / soc / drm: mediatek: Remove struct cmdq_client
  drm/mediatek: Detect CMDQ execution timeout

 drivers/gpu/drm/mediatek/mtk_drm_crtc.c  |  54 ++++++---
 drivers/mailbox/mtk-cmdq-mailbox.c       |  24 ++--
 drivers/soc/mediatek/mtk-cmdq-helper.c   | 146 ++---------------------
 include/linux/mailbox/mtk-cmdq-mailbox.h |  25 +---
 include/linux/soc/mediatek/mtk-cmdq.h    |  54 +--------
 5 files changed, 66 insertions(+), 237 deletions(-)

-- 
2.17.1