gpu: nvgpu: add flag for CAR reset in do_idle()

Add "force_reset" flag to __gk20a_do_idle()

For real world use cases like VPR resizing, we cannot wait
for railgate_delay (which is 500 mS). Hence use CAR reset
for this use case. (this is done via gk20a_do_idle() API
with force_reset = true)

Some of the test cases make use of sysfs "force_idle" and
they expect GPU to be into really railgated state and
not in CAR reset.
Hence when called from sysfs, set force_reset = false.

When global flag "force_reset_in_do_idle" is set, it will
override local flags and force CAR reset case.
This is desired in cases where railgating is not enabled

Also, set force_reset_in_do_idle = false for GM20B since
railgating has been enabled for GM20B

Bug 1592997

Change-Id: I6c5af2977c7211ef82551a86a7c1eb51b8ccee60
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/711615
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gk20a.h b/drivers/gpu/nvgpu/gk20a/gk20a.h
index ba7c7e97..acee2e48 100644
--- a/drivers/gpu/nvgpu/gk20a/gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/gk20a.h
@@ -776,7 +776,7 @@ void gk20a_idle(struct platform_device *pdev);
 void gk20a_disable(struct gk20a *g, u32 units);
 void gk20a_enable(struct gk20a *g, u32 units);
 void gk20a_reset(struct gk20a *g, u32 units);
-int __gk20a_do_idle(struct platform_device *pdev);
+int __gk20a_do_idle(struct platform_device *pdev, bool force_reset);
 int __gk20a_do_unidle(struct platform_device *pdev);
 
 const struct firmware *