diff options
| author | Arto Merilainen <amerilainen@nvidia.com> | 2014-01-27 15:35:02 +0200 |
|---|---|---|
| committer | Terje Bergstrom <tbergstrom@nvidia.com> | 2014-01-29 03:35:13 -0800 |
| commit | 26a801dc5fd89df910c0b03c094c5d17d1e9866f (patch) | |
| tree | 0f3f6191465841d3a44680172162b97d2b4f469a /drivers/video/tegra/host/nvhost_acm.c | |
| parent | bf09d3dfdbb185850d023179f352d34d3f852178 (diff) | |
video: tegra: host: Module suspend informs EDP
GPU scaling informs the current GPU load to EDP each time we change
the GPU frequency. Usually the load vanishes and hence this approach
has proven to work well. However, occassionally the GPU load is high
on the last time we estimate the frequency (before suspending) and this
leads EDP to think that GPU is busy even though it is already turned
off.
This patch adds a path to inform EDP about zero load when we are
suspending the GPU EDP device.
Change-Id: Idfe72ad6afbf2aa01cc30408b7f0890c76a89f62
Signed-off-by: Arto Merilainen <amerilainen@nvidia.com>
Reviewed-on: http://git-master/r/360431
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Diffstat (limited to 'drivers/video/tegra/host/nvhost_acm.c')
| -rw-r--r-- | drivers/video/tegra/host/nvhost_acm.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/video/tegra/host/nvhost_acm.c b/drivers/video/tegra/host/nvhost_acm.c index d1f81ea2211f..319c1e73be4e 100644 --- a/drivers/video/tegra/host/nvhost_acm.c +++ b/drivers/video/tegra/host/nvhost_acm.c @@ -33,6 +33,7 @@ #include <linux/tegra-powergate.h> #include <linux/tegra-soc.h> #include <trace/events/nvhost.h> +#include <linux/platform_data/tegra_edp.h> #include <mach/mc.h> #include <mach/pm_domains.h> @@ -598,6 +599,10 @@ int nvhost_module_suspend(struct device *dev) if (pdata->suspend_ndev) pdata->suspend_ndev(dev); + /* inform edp governor that there is no load any more */ + if (pdata->gpu_edp_device) + tegra_edp_notify_gpu_load(0); + return 0; } EXPORT_SYMBOL(nvhost_module_suspend); |