linux-kernel - [PATCH] drm/mediatek: Implement shutdown

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Message-Id: <20221128-mtk-drm-v1-0-409e7f2352e4@chromium.org>
Date:   Mon, 28 Nov 2022 11:41:47 +0100
From:   Ricardo Ribalda <ribalda@...omium.org>
To:     Philipp Zabel <p.zabel@...gutronix.de>,
        Daniel Vetter <daniel@...ll.ch>,
        Chun-Kuang Hu <chunkuang.hu@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        David Airlie <airlied@...il.com>
Cc:     linux-mediatek@...ts.infradead.org,
        dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org,
        Ricardo Ribalda <ribalda@...omium.org>,
        linux-kernel@...r.kernel.org
Subject: [PATCH] drm/mediatek: Implement shutdown

Poweroff the device properly, otherwise the device will not come back
from kexec().

Signed-off-by: Ricardo Ribalda <ribalda@...omium.org>
---
To: Chun-Kuang Hu <chunkuang.hu@...nel.org>
To: Philipp Zabel <p.zabel@...gutronix.de>
To: David Airlie <airlied@...il.com>
To: Daniel Vetter <daniel@...ll.ch>
To: Matthias Brugger <matthias.bgg@...il.com>
Cc: dri-devel@...ts.freedesktop.org
Cc: linux-mediatek@...ts.infradead.org
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-kernel@...r.kernel.org
---
 drivers/gpu/drm/mediatek/mtk_drm_drv.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
index 91f58db5915f..51dbd85796e9 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
@@ -829,6 +829,12 @@ static int mtk_drm_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static void mtk_drm_shutdown(struct platform_device *pdev)
+{
+	component_master_del(&pdev->dev, &mtk_drm_ops);
+	pm_runtime_disable(&pdev->dev);
+}
+
 static int mtk_drm_sys_prepare(struct device *dev)
 {
 	struct mtk_drm_private *private = dev_get_drvdata(dev);
@@ -856,6 +862,7 @@ static const struct dev_pm_ops mtk_drm_pm_ops = {
 static struct platform_driver mtk_drm_platform_driver = {
 	.probe	= mtk_drm_probe,
 	.remove	= mtk_drm_remove,
+	.shutdown = mtk_drm_shutdown,
 	.driver	= {
 		.name	= "mediatek-drm",
 		.pm     = &mtk_drm_pm_ops,

---
base-commit: 4312098baf37ee17a8350725e6e0d0e8590252d4
change-id: 20221128-mtk-drm-ca6c5ac6b389

Best regards,
-- 
Ricardo Ribalda <ribalda@...omium.org>