gpu: nvgpu: Bump semaphore timeout

Semaphore acquire timeout is configured to half of watchdog timeout.
This is too short, so bump it to 80% of watchdog timeout.

Bug 200261389

Change-Id: Ie906ea3d3520c2e3f547cff7ffbb1e37459e6d2f
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/1283623
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/channel_gk20a.c b/drivers/gpu/nvgpu/gk20a/channel_gk20a.c
index 793c97c3..1ee9b59a 100644
--- a/drivers/gpu/nvgpu/gk20a/channel_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/channel_gk20a.c
@@ -247,7 +247,8 @@ u32 channel_gk20a_pbdma_acquire_val(struct channel_gk20a *c)
                 return val;
 
         timeout = gk20a_get_channel_watchdog_timeout(c);
-        do_div(timeout, 2); /* set acquire timeout to half of channel wdt */
+        timeout *= 80UL;
+        do_div(timeout, 100); /* set acquire timeout to 80% of channel wdt */
         timeout *= 1000000UL; /* ms -> ns */
         do_div(timeout, 1024); /* in unit of 1024ns */
         val_len = fls(timeout >> 32) + 32;