From: Krishna Manikandan mkrishn@codeaurora.org

[ Upstream commit 9d5cbf5fe46e350715389d89d0c350d83289a102 ]

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 Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/msm/msm_drv.c | 8 ++++++++ 1 file changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c index 6f81de85fb860..7f45486b6650b 100644 --- a/drivers/gpu/drm/msm/msm_drv.c +++ b/drivers/gpu/drm/msm/msm_drv.c @@ -1358,6 +1358,13 @@ 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 }, @@ -1369,6 +1376,7 @@ 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,