diff options
| author | Wen Yi <wyi@nvidia.com> | 2011-05-17 13:49:28 -0700 |
|---|---|---|
| committer | Niket Sirsi <nsirsi@nvidia.com> | 2011-07-22 16:29:31 -0700 |
| commit | 00aa9d18ae1e3c5cb26cc036467e93cfbd04d72a (patch) | |
| tree | a0c0f302ba749067bca412e0250479a6f4b132cc | |
| parent | 742bb4012fae6396b10dc5be13d7ee384a14c501 (diff) | |
video: tegra: host: change acm timeout to 40 ms
The cursor in Android application flashes about 1 hz and
the duty cycle for this kind of 3D activity should be far
smaller than 1 second. To save power set acm timeout to 25 ms.
40 ms (4 in jiffies) is selected to prevent jitter of 30 fps
video capture.
BUG 824299
(cherry picked from http://git-master/r/31905)
Change-Id: Ibab9949d18c464119886ecefa016fbb963eeb2b7
Reviewed-on: http://git-master/r/37279
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Sun Kyu Choi <sunkyuc@nvidia.com>
Reviewed-by: Joshua Cha <joshuac@nvidia.com>
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>
| -rw-r--r-- | drivers/video/tegra/host/nvhost_acm.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/video/tegra/host/nvhost_acm.c b/drivers/video/tegra/host/nvhost_acm.c index c2152287506f..bde5a7f9ffc8 100644 --- a/drivers/video/tegra/host/nvhost_acm.c +++ b/drivers/video/tegra/host/nvhost_acm.c @@ -30,7 +30,7 @@ #include "dev.h" -#define ACM_TIMEOUT 1*HZ +#define ACM_TIMEOUT_MSEC 40 #define DISABLE_3D_POWERGATING #define DISABLE_MPE_POWERGATING @@ -88,7 +88,8 @@ void nvhost_module_idle_mult(struct nvhost_module *mod, int refs) mutex_lock(&mod->lock); if (atomic_sub_return(refs, &mod->refcount) == 0) { BUG_ON(!mod->powered); - schedule_delayed_work(&mod->powerdown, ACM_TIMEOUT); + schedule_delayed_work(&mod->powerdown, + msecs_to_jiffies(ACM_TIMEOUT_MSEC)); kick = true; } mutex_unlock(&mod->lock); @@ -226,7 +227,7 @@ void nvhost_module_suspend(struct nvhost_module *mod, bool system_suspend) debug_not_idle(mod); ret = wait_event_timeout(mod->idle, is_module_idle(mod), - ACM_TIMEOUT + msecs_to_jiffies(500)); + msecs_to_jiffies(ACM_TIMEOUT_MSEC+500)); if (ret == 0) nvhost_debug_dump(); |