gpu: nvgpu: scale ptimer based timeouts

bug 1603226

host based timeouts use ptimer for detecting
timeouts. on gk20a and gm20b ptimer runs 2.6x
slower. scale the fifo_eng_timeout to account
for this

Change-Id: Ie44718382953e36436ea47d6e89b9a225d5c2070
Signed-off-by: Vijayakumar <vsubbu@nvidia.com>
Reviewed-on: http://git-master/r/799983
(cherry picked from commit d1d837fd09ff0f035feff1757c67488404c23cc6)
Reviewed-on: http://git-master/r/808250
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c b/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c
index f736fe8c..ae36478e 100644
--- a/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/fifo_gk20a.c
@@ -344,6 +344,7 @@ int gk20a_init_fifo_reset_enable_hw(struct gk20a *g)
         u32 mask;
         u32 timeout;
         int i;
+        struct gk20a_platform *platform = platform_get_drvdata(g->dev);
 
         gk20a_dbg_fn("");
         /* enable pmc pfifo */
@@ -408,8 +409,9 @@ int gk20a_init_fifo_reset_enable_hw(struct gk20a *g)
         if (g->ops.fifo.apply_pb_timeout)
                 g->ops.fifo.apply_pb_timeout(g);
 
-        timeout = GRFIFO_TIMEOUT_CHECK_PERIOD_US |
-                        fifo_eng_timeout_detection_enabled_f();
+        timeout = GRFIFO_TIMEOUT_CHECK_PERIOD_US;
+        timeout = scale_ptimer(timeout, platform->ptimerscaling10x);
+        timeout |= fifo_eng_timeout_detection_enabled_f();
         gk20a_writel(g, fifo_eng_timeout_r(), timeout);
 
         gk20a_dbg_fn("done");