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drm/msm: add shutdown support for display platform_driver

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Define shutdown callback for display drm driver,
so as to disable all the CRTCS when shutdown
notification is received by the driver.

This change will turn off the timing engine so
that no display transactions are requested
while mmu translations are getting disabled
during reboot sequence.

Signed-off-by: Krishna Manikandan <mkrishn@codeaurora.org>

Changes in v2:
	- Remove NULL check from msm_pdev_shutdown (Stephen Boyd)
	- Change commit text to reflect when this issue
	  was uncovered (Sai Prakash Ranjan)

Signed-off-by: Rob Clark <robdclark@chromium.org>
This commit is contained in:
Krishna Manikandan 2020-06-01 16:33:22 +05:30 committed by Rob Clark
parent 20925fe844
commit 9d5cbf5fe4
1 changed files with 8 additions and 0 deletions
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8
drivers/gpu/drm/msm/msm_drv.c
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@ -1320,6 +1320,13 @@ static int msm_pdev_remove(struct platform_device *pdev)
return 0;
}
static void msm_pdev_shutdown(struct platform_device *pdev)
{
struct drm_device *drm = platform_get_drvdata(pdev);
drm_atomic_helper_shutdown(drm);
}
static const struct of_device_id dt_match[] = {
{ .compatible = "qcom,mdp4", .data = (void *)KMS_MDP4 },
{ .compatible = "qcom,mdss", .data = (void *)KMS_MDP5 },
@ -1332,6 +1339,7 @@ MODULE_DEVICE_TABLE(of, dt_match);
static struct platform_driver msm_platform_driver = {
.probe = msm_pdev_probe,
.remove = msm_pdev_remove,
.shutdown = msm_pdev_shutdown,
.driver = {
.name = "msm",
.of_match_table = dt_match,