Based on grepping through the source code this driver appears to be
missing a call to drm_atomic_helper_shutdown() at system shutdown
time. Among other things, this means that if a panel is in use that it
won't be cleanly powered off at system shutdown time.
The fact that we should call drm_atomic_helper_shutdown() in the case
of OS shutdown/restart comes straight out of the kernel doc "driver
instance overview" in drm_drv.c.
Suggested-by: Maxime Ripard <mripard@xxxxxxxxxx>
Signed-off-by: Douglas Anderson <dianders@xxxxxxxxxxxx>
---
This commit is only compile-time tested.
drivers/gpu/drm/imx/dcss/dcss-drv.c | 8 ++++++++
drivers/gpu/drm/imx/dcss/dcss-kms.c | 7 +++++++
drivers/gpu/drm/imx/dcss/dcss-kms.h | 1 +
3 files changed, 16 insertions(+)
diff --git a/drivers/gpu/drm/imx/dcss/dcss-drv.c b/drivers/gpu/drm/imx/dcss/dcss-drv.c
index c68b0d93ae9e..b61cec0cc79d 100644
--- a/drivers/gpu/drm/imx/dcss/dcss-drv.c
+++ b/drivers/gpu/drm/imx/dcss/dcss-drv.c
@@ -92,6 +92,13 @@ static int dcss_drv_platform_remove(struct platform_device *pdev)
return 0;
}
+static void dcss_drv_platform_shutdown(struct platform_device *pdev)
+{
+ struct dcss_drv *mdrv = dev_get_drvdata(&pdev->dev);
+
+ dcss_kms_shutdown(mdrv->kms);
+}
+
static struct dcss_type_data dcss_types[] = {
[DCSS_IMX8MQ] = {
.name = "DCSS_IMX8MQ",
@@ -114,6 +121,7 @@ MODULE_DEVICE_TABLE(of, dcss_of_match);
static struct platform_driver dcss_platform_driver = {
.probe = dcss_drv_platform_probe,
.remove = dcss_drv_platform_remove,
+ .shutdown = dcss_drv_platform_shutdown,
.driver = {
.name = "imx-dcss",
.of_match_table = dcss_of_match,
diff --git a/drivers/gpu/drm/imx/dcss/dcss-kms.c b/drivers/gpu/drm/imx/dcss/dcss-kms.c
index 896de946f8df..d0ea4e97cded 100644
--- a/drivers/gpu/drm/imx/dcss/dcss-kms.c
+++ b/drivers/gpu/drm/imx/dcss/dcss-kms.c
@@ -172,3 +172,10 @@ void dcss_kms_detach(struct dcss_kms_dev *kms)
dcss_crtc_deinit(&kms->crtc, drm);
drm->dev_private = NULL;
}
+
+void dcss_kms_shutdown(struct dcss_kms_dev *kms)
+{
+ struct drm_device *drm = &kms->base;
+
+ drm_atomic_helper_shutdown(drm);
+}
diff --git a/drivers/gpu/drm/imx/dcss/dcss-kms.h b/drivers/gpu/drm/imx/dcss/dcss-kms.h
index dfe5dd99eea3..62521c1fd6d2 100644
--- a/drivers/gpu/drm/imx/dcss/dcss-kms.h
+++ b/drivers/gpu/drm/imx/dcss/dcss-kms.h
@@ -34,6 +34,7 @@ struct dcss_kms_dev {
struct dcss_kms_dev *dcss_kms_attach(struct dcss_dev *dcss);
void dcss_kms_detach(struct dcss_kms_dev *kms);
+void dcss_kms_shutdown(struct dcss_kms_dev *kms);
int dcss_crtc_init(struct dcss_crtc *crtc, struct drm_device *drm);
void dcss_crtc_deinit(struct dcss_crtc *crtc, struct drm_device *drm);
struct dcss_plane *dcss_plane_init(struct drm_device *drm,
--
2.42.0.283.g2d96d420d3-goog
