Fix drm suspend and resume issue - jason-jh.lin

From: jason-jh.lin <jason-jh.lin@mediatek.com>
To: Chun-Kuang Hu <chunkuang.hu@kernel.org>,
	Philipp Zabel <p.zabel@pengutronix.de>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	"Jassi Brar" <jassisinghbrar@gmail.com>
Cc: David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
	<dri-devel@lists.freedesktop.org>,
	<linux-mediatek@lists.infradead.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-kernel@vger.kernel.org>, <hsinyi@chromium.org>,
	<fshao@chromium.org>, <tzungbi@google.com>,
	<nancy.lin@mediatek.com>, <singo.chang@mediatek.com>,
	jason-jh.lin <jason-jh.lin@mediatek.com>
Subject: Fix drm suspend and resume issue
Date: Wed, 17 Nov 2021 14:41:55 +0800	[thread overview]
Message-ID: <20211117064158.27451-1-jason-jh.lin@mediatek.com> (raw)

Subject: [PATCH 0/3] Fix drm suspend and resume issue

1. When the hardwire components on crtc is using GCE to configure their
   register, cmdq_suspend may be called.
   So add cmdq_mbox_flush to clear all tasks and release GCE clocks
   before cmdq_suspend.

2. The suspend and resume order of components on crtc can be guaranteed
   by the same power-domain, but cmdq can not.
   So add devlink to cmdq dev make sure the order of suspend and resume:
   cmdq_suspend is latter than drm_suspend and
   cmdq_resume is earlier than drm_resume.

jason-jh.lin (3):
  mialbox: move cmdq suspend,resume and remove after cmdq_mbox_flush
  mailbox: add cmdq_mbox_flush to clear all task before suspend
  drm/mediatek: add devlink to cmdq dev

 drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 13 ++++
 drivers/mailbox/mtk-cmdq-mailbox.c      | 81 ++++++++++++-------------
 2 files changed, 52 insertions(+), 42 deletions(-)

-- 
2.18.0

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