diff mbox series

[v3] drm: renesas: shmobile: Call drm_atomic_helper_shutdown() at shutdown time

Message ID 17c6a5a668e5975f871b77fb1fca6711a0799d9e.1718176895.git.geert+renesas@glider.be (mailing list archive)
State Mainlined
Commit 0320ca14c6fb68ad19aa72e55a1a21c061b2946b
Delegated to: Kieran Bingham
Headers show
Series [v3] drm: renesas: shmobile: Call drm_atomic_helper_shutdown() at shutdown time | expand

Commit Message

Geert Uytterhoeven June 12, 2024, 7:23 a.m. UTC 
From: Douglas Anderson <dianders@chromium.org>

Based on grepping through the source code, this driver appears to be
missing a call to drm_atomic_helper_shutdown() at system shutdown time.
This is important because drm_atomic_helper_shutdown() will cause
panels to get disabled cleanly which may be important for their power
sequencing.  Future changes will remove any custom powering off in
individual panel drivers so the DRM drivers need to start getting this
right.

The fact that we should call drm_atomic_helper_shutdown() in the case of
OS shutdown comes straight out of the kernel doc "driver instance
overview" in drm_drv.c.

Suggested-by: Maxime Ripard <mripard@kernel.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20230901164111.RFT.15.Iaf638a1d4c8b3c307a6192efabb4cbb06b195f15@changeid
[geert: s/drm_helper_force_disable_all/drm_atomic_helper_shutdown/]
[geert: shmob_drm_remove() already calls drm_atomic_helper_shutdown]
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Sui Jingfeng <sui.jingfeng@linux.dev>
---
v3:
  - Add Reviewed-by,
  - Fix remaining references to drm_helper_force_disable_all(),

v2:
  - Add Reviewed-by.

Tested on Atmark Techno Armadillo-800-EVA.
---
 drivers/gpu/drm/renesas/shmobile/shmob_drm_drv.c | 8 ++++++++
 1 file changed, 8 insertions(+)

Comments

Maxime Ripard June 12, 2024, 7:57 a.m. UTC | #1 
On Wed, 12 Jun 2024 09:23:13 +0200, Geert Uytterhoeven wrote:
> Based on grepping through the source code, this driver appears to be
> missing a call to drm_atomic_helper_shutdown() at system shutdown time.
> This is important because drm_atomic_helper_shutdown() will cause
> panels to get disabled cleanly which may be important for their power
> sequencing.  Future changes will remove any custom powering off in
> individual panel drivers so the DRM drivers need to start getting this
> right.
> 
> [...]

Applied to misc/kernel.git (drm-misc-fixes).

Thanks!
Maxime
diff mbox series

Patch

diff --git a/drivers/gpu/drm/renesas/shmobile/shmob_drm_drv.c b/drivers/gpu/drm/renesas/shmobile/shmob_drm_drv.c
index e83c3e52251dedf9..0250d5f00bf102dc 100644
--- a/drivers/gpu/drm/renesas/shmobile/shmob_drm_drv.c
+++ b/drivers/gpu/drm/renesas/shmobile/shmob_drm_drv.c
@@ -171,6 +171,13 @@  static void shmob_drm_remove(struct platform_device *pdev)
 	drm_kms_helper_poll_fini(ddev);
 }
 
+static void shmob_drm_shutdown(struct platform_device *pdev)
+{
+	struct shmob_drm_device *sdev = platform_get_drvdata(pdev);
+
+	drm_atomic_helper_shutdown(&sdev->ddev);
+}
+
 static int shmob_drm_probe(struct platform_device *pdev)
 {
 	struct shmob_drm_platform_data *pdata = pdev->dev.platform_data;
@@ -273,6 +280,7 @@  static const struct of_device_id shmob_drm_of_table[] __maybe_unused = {
 static struct platform_driver shmob_drm_platform_driver = {
 	.probe		= shmob_drm_probe,
 	.remove_new	= shmob_drm_remove,
+	.shutdown	= shmob_drm_shutdown,
 	.driver		= {
 		.name	= "shmob-drm",
 		.of_match_table = of_match_ptr(shmob_drm_of_table),