diff options
| author | peter mikolajczyk <pmikolajczyk@nvidia.com> | 2011-11-09 14:19:06 -0800 |
|---|---|---|
| committer | Dan Willemsen <dwillemsen@nvidia.com> | 2011-11-30 21:49:59 -0800 |
| commit | c3510d18d039e966bf8f115cc317b525abb615bf (patch) | |
| tree | be1568916d3e141916d14a8d5a5cd29f9be13398 /drivers/media/video/tegra/tegra_camera.c | |
| parent | a524f1b30b495babf871d8010ba7292e700610cb (diff) | |
media: video: tegra: Prevent sleep when cam open
Adding a check for camera open in order to prevent
driver from allowing the system to go to sleep.
Application layers must release camera before
suspend is called
bug 870768
Reviewed-on: http://git-master/r/#change,60307
(cherry picked from commit I5df86a22e46af724fd2cf4d8a0440350cbd4aba2)
Change-Id: I36e8d7c3b8b8002fc195e8f6bb0e0a228a397c2d
Reviewed-on: http://git-master/r/63384
Reviewed-by: Lokesh Pathak <lpathak@nvidia.com>
Tested-by: Lokesh Pathak <lpathak@nvidia.com>
Rebase-Id: R35ad971920f255e1427dbb87e8c76375971a9c9a
Diffstat (limited to 'drivers/media/video/tegra/tegra_camera.c')
| -rw-r--r-- | drivers/media/video/tegra/tegra_camera.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/media/video/tegra/tegra_camera.c b/drivers/media/video/tegra/tegra_camera.c index 95d477ee8cca..a21051690f84 100644 --- a/drivers/media/video/tegra/tegra_camera.c +++ b/drivers/media/video/tegra/tegra_camera.c @@ -111,6 +111,18 @@ struct tegra_camera_block tegra_camera_block[] = { #define TEGRA_CAMERA_PD2VI_CLK_SEL_VI_SENSOR_CLK (1<<25) #define TEGRA_CAMERA_PD2VI_CLK_SEL_PD2VI_CLK 0 +static bool tegra_camera_enabled() +{ + bool ret = false; + + mutex_lock(&tegra_camera_lock); + ret = tegra_camera_block[TEGRA_CAMERA_MODULE_ISP].is_enabled == true || + tegra_camera_block[TEGRA_CAMERA_MODULE_VI].is_enabled == true || + tegra_camera_block[TEGRA_CAMERA_MODULE_CSI].is_enabled == true; + mutex_unlock(&tegra_camera_lock); + return ret; +} + static int tegra_camera_clk_set_rate(struct tegra_camera_clk_info *info) { u32 offset; @@ -355,9 +367,28 @@ static int tegra_camera_remove(struct platform_device *pdev) return 0; } +static int tegra_camera_suspend(struct platform_device *pdev, pm_message_t state) +{ + int ret = 0; + + if (tegra_camera_enabled()) { + ret = -EBUSY; + pr_info("tegra_camera cannot suspend, application is holding on to camera. \n"); + } + + return ret; +} + +static int tegra_camera_resume(struct platform_device *pdev) +{ + return 0; +} + static struct platform_driver tegra_camera_driver = { .probe = tegra_camera_probe, .remove = tegra_camera_remove, + .suspend = tegra_camera_suspend, + .resume = tegra_camera_resume, .driver = { .name = TEGRA_CAMERA_NAME } }; |