From a76c6fc95008fe0fbe5584a3e755b86d84b95b28 Mon Sep 17 00:00:00 2001 From: Deepak Nibade Date: Wed, 15 Jul 2015 16:10:47 +0530 Subject: gpu: nvgpu: prepare_poweroff() in shutdown() gk20a_pm_shutdown() is the last callback before GPU railgate will be forced by platform code Hence we need to call prepare_poweroff() before returning from shutdown() to clean up below things mainly, 1. disable interrupts to ensure that GPU is not processing any interrupts while railgating 2. disable clocks (and related flags) to ensure no h/w access from exported clock ops Note that GPU railgate will be triggered by platform code since config CONFIG_PM_GENERIC_DOMAINS_OF is enabled by default Bug 200123584 Change-Id: Ifaa0d1ba9b01d49bf5cc85d9c9a9feb3815866d8 Signed-off-by: Deepak Nibade Reviewed-on: http://git-master/r/770485 Reviewed-by: Prashant Gaikwad Reviewed-by: Sachin Nikam --- drivers/gpu/nvgpu/gk20a/gk20a.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/gpu/nvgpu') diff --git a/drivers/gpu/nvgpu/gk20a/gk20a.c b/drivers/gpu/nvgpu/gk20a/gk20a.c index badb7717..3dfc50e8 100644 --- a/drivers/gpu/nvgpu/gk20a/gk20a.c +++ b/drivers/gpu/nvgpu/gk20a/gk20a.c @@ -1148,6 +1148,9 @@ static void gk20a_pm_shutdown(struct platform_device *pdev) break; } #endif + + /* Be ready for rail-gate after this point */ + gk20a_pm_prepare_poweroff(&pdev->dev); } #ifdef CONFIG_PM -- cgit v1.2.2