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gpu: nvgpu: Use usleep_range() instead of hrtimer

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FECS trace used hrtimer for sleeping between frames. The resolution
does not need to be that high, and hrtimers are not portable, so
replace the delay with nvpgu_usleep_range().

Bug 200290850

Change-Id: I10fc56fcf6f6d407413384d557ae4bfdfa4239ef
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/1465761
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: svccoveritychecker <svccoveritychecker@nvidia.com>
Reviewed-by: Thomas Fleury <tfleury@nvidia.com>
Reviewed-by: Sachin Nikam <snikam@nvidia.com>
GVS: Gerrit_Virtual_Submit
This commit is contained in:
Terje Bergstrom
2017-04-19 09:52:41 -07:00
committed by mobile promotions
parent 0d8f5f3fdb
commit 59e2c410a1
1 changed files with 3 additions and 3 deletions
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6
drivers/gpu/nvgpu/gk20a/fecs_trace_gk20a.c
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@@ -37,7 +37,7 @@
*/
#define GK20A_FECS_TRACE_NUM_RECORDS (1 << 6)
#define GK20A_FECS_TRACE_HASH_BITS 8 /* 2^8 */
#define GK20A_FECS_TRACE_FRAME_PERIOD_NS (1000000000ULL/60ULL)
#define GK20A_FECS_TRACE_FRAME_PERIOD_US (1000000ULL/60ULL)
#define GK20A_FECS_TRACE_PTIMER_SHIFT 5
struct gk20a_fecs_trace_record {
@@ -379,13 +379,13 @@ done:
static int gk20a_fecs_trace_periodic_polling(void *arg)
{
struct gk20a *g = (struct gk20a *)arg;
struct timespec ts = ns_to_timespec(GK20A_FECS_TRACE_FRAME_PERIOD_NS);
pr_info("%s: running\n", __func__);
while (!kthread_should_stop()) {
hrtimer_nanosleep(&ts, NULL, HRTIMER_MODE_REL, CLOCK_MONOTONIC);
nvgpu_usleep_range(GK20A_FECS_TRACE_FRAME_PERIOD_US,
GK20A_FECS_TRACE_FRAME_PERIOD_US * 2);
gk20a_fecs_trace_poll(g);
}