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Commit d35aafe6 authored by Harshdeep Dhatt's avatar Harshdeep Dhatt Committed by Jordan Crouse
Browse files

msm: kgsl: log debug info to help detect syncpoint deadlock 



Dump sync fence info of a fence for which a KGSL context is waiting
for more than 5 seconds. This info will help detect if there is
a possible gpu syncpoint deadlock.

Change-Id: I53282ce08e716cfdb44ca448f880e84816dc4ded
Signed-off-by: default avatarHarshdeep Dhatt <hdhatt@codeaurora.org>
parent f290ff66

drivers/gpu/msm/kgsl.c

+25 −1
Original line number Diff line number Diff line
@@ -1541,6 +1541,7 @@ static void _kgsl_cmdbatch_timer(unsigned long data) 
{

	struct kgsl_device *device;

	struct kgsl_cmdbatch *cmdbatch = (struct kgsl_cmdbatch *) data;

	struct kgsl_cmdbatch_sync_event *event;



	if (cmdbatch == NULL || cmdbatch->context == NULL)

		return;
@@ -1556,7 +1557,30 @@ static void _kgsl_cmdbatch_timer(unsigned long data) 
		cmdbatch->context->id, cmdbatch->timestamp);

	dev_err(device->dev, " Active sync points:\n");



	kgsl_dump_syncpoints(device, cmdbatch);

	/* Print all the pending sync objects */

	list_for_each_entry(event, &cmdbatch->synclist, node) {

		switch (event->type) {

		case KGSL_CMD_SYNCPOINT_TYPE_TIMESTAMP: {

			unsigned int retired;



			kgsl_readtimestamp(event->device,

				event->context, KGSL_TIMESTAMP_RETIRED,

					&retired);



			dev_err(device->dev,

				"  [timestamp] context %d timestamp %d (retired %d)\n",

				event->context->id, event->timestamp, retired);

			break;

		}

		case KGSL_CMD_SYNCPOINT_TYPE_FENCE:

			if (event->handle && event->handle->fence)

				sync_fence_log(event->handle->fence);

			else

				dev_err(device->dev, "  fence: invalid\n");

			break;

		}

	}



done:

	spin_unlock(&cmdbatch->lock);

}