msm: kgsl: Get GPU snapshot if wait for global timestamp timeout

If the wait for global fails due to timeout then nothing after this
point is likely to work very well. Get GPU snapshot in addition to
BUG_ON(), to analyze the GPU fault.

CRs-Fixed: 1053780
Change-Id: I29930120a72a08533c859002f646af93e67c754f
Signed-off-by: Hareesh Gundu <hareeshg@codeaurora.org>

diff --git a/drivers/gpu/msm/adreno_drawctxt.c b/drivers/gpu/msm/adreno_drawctxt.c
index fb95f61..d9ebe37 100644 (file)
--- a/drivers/gpu/msm/adreno_drawctxt.c
+++ b/drivers/gpu/msm/adreno_drawctxt.c
@@ -499,13 +499,20 @@ void adreno_drawctxt_detach(struct kgsl_context *context)
 
        /*
         * If the wait for global fails due to timeout then nothing after this
-        * point is likely to work very well - BUG_ON() so we can take advantage
-        * of the debug tools to figure out what the h - e - double hockey
-        * sticks happened. If EAGAIN error is returned then recovery will kick
-        * in and there will be no more commands in the RB pipe from this
-        * context which is waht we are waiting for, so ignore -EAGAIN error
+        * point is likely to work very well - Get GPU snapshot and BUG_ON()
+        * so we can take advantage of the debug tools to figure out what the
+        * h - e - double hockey sticks happened. If EAGAIN error is returned
+        * then recovery will kick in and there will be no more commands in the
+        * RB pipe from this context which is waht we are waiting for, so ignore
+        * -EAGAIN error
         */
-       BUG_ON(ret && ret != -EAGAIN);
+       if (ret && ret != -EAGAIN) {
+               KGSL_DRV_ERR(device, "Wait for global ts=%d type=%d error=%d\n",
+                               drawctxt->internal_timestamp,
+                               drawctxt->type, ret);
+               device->force_panic = 1;
+               kgsl_device_snapshot(device, context);
+       }
 
        kgsl_sharedmem_writel(device, &device->memstore,
                        KGSL_MEMSTORE_OFFSET(context->id, soptimestamp),