msm: kgsl: Don't use 'wait_timeout' in the idle functions
There are two distinct parts of the code that may need to loop waiting
for the GPU to complete a task: waiting for a timestamp and waiting
for the entire core to go idle. Waiting for a timestamp technically
doesn't need a timeout since the only downside is a process that sleeps
forever with an interruptible timeout. Waiting for the core to go idle
is more problematic because it is a busy wait and it is the last point
we can safely detect a GPU hang.
Beacuse we can (and will) not use a timeout in wait for timestamp, we
need to institute a new timeout value to be used in idle. Nowhere the
idle function is called uses a custom value for the timeout, so remove
that parameter from the calls and use a static timeout value in the
core specific functions.
Change-Id: Ic0dedbad9ecd2044c34e4cec551dc7f53b253f3d
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
diff --git a/drivers/gpu/msm/adreno_ringbuffer.c b/drivers/gpu/msm/adreno_ringbuffer.c
index ca9e335..e0ef1fd 100644
--- a/drivers/gpu/msm/adreno_ringbuffer.c
+++ b/drivers/gpu/msm/adreno_ringbuffer.c
@@ -393,7 +393,7 @@
adreno_dev->gpudev->rb_init(adreno_dev, rb);
/* idle device to validate ME INIT */
- status = adreno_idle(device, KGSL_TIMEOUT_DEFAULT);
+ status = adreno_idle(device);
if (status == 0)
rb->flags |= KGSL_FLAGS_STARTED;
@@ -961,7 +961,7 @@
* this is conservative but works reliably and is ok
* even for performance simulations
*/
- adreno_idle(device, KGSL_TIMEOUT_DEFAULT);
+ adreno_idle(device);
#endif
/* If context hung and recovered then return error so that the
* application may handle it */