diff options
Diffstat (limited to 'arch/arm/mach-tegra/tegra_i2s_audio.c')
| -rw-r--r-- | arch/arm/mach-tegra/tegra_i2s_audio.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/tegra_i2s_audio.c b/arch/arm/mach-tegra/tegra_i2s_audio.c index 1368d173a2ba..fc790066694a 100644 --- a/arch/arm/mach-tegra/tegra_i2s_audio.c +++ b/arch/arm/mach-tegra/tegra_i2s_audio.c @@ -44,6 +44,7 @@ #include <linux/io.h> #include <linux/ktime.h> #include <linux/sysfs.h> +#include <linux/wakelock.h> #include <linux/delay.h> #include <linux/tegra_audio.h> #include <linux/pm.h> @@ -89,6 +90,8 @@ struct audio_stream { spinlock_t dma_req_lock; struct work_struct allow_suspend_work; + struct wake_lock wake_lock; + char wake_lock_name[100]; }; /* per i2s controller */ @@ -199,6 +202,7 @@ static inline void prevent_suspend(struct audio_stream *as) { pr_debug("%s\n", __func__); cancel_work_sync(&as->allow_suspend_work); + wake_lock(&as->wake_lock); } static void allow_suspend_worker(struct work_struct *w) @@ -206,6 +210,7 @@ static void allow_suspend_worker(struct work_struct *w) struct audio_stream *as = container_of(w, struct audio_stream, allow_suspend_work); pr_debug("%s\n", __func__); + wake_unlock(&as->wake_lock); } static inline void allow_suspend(struct audio_stream *as) @@ -1822,6 +1827,12 @@ static int tegra_audio_probe(struct platform_device *pdev) INIT_WORK(&state->out.allow_suspend_work, allow_suspend_worker); + snprintf(state->out.wake_lock_name, + sizeof(state->out.wake_lock_name), + "i2s.%d-audio-out", state->pdev->id); + wake_lock_init(&state->out.wake_lock, WAKE_LOCK_SUSPEND, + state->out.wake_lock_name); + rc = setup_misc_device(&state->misc_out, &tegra_audio_out_fops, "audio%d_out", state->pdev->id); @@ -1858,6 +1869,12 @@ static int tegra_audio_probe(struct platform_device *pdev) INIT_WORK(&state->in.allow_suspend_work, allow_suspend_worker); + snprintf(state->in.wake_lock_name, + sizeof(state->in.wake_lock_name), + "i2s.%d-audio-in", state->pdev->id); + wake_lock_init(&state->in.wake_lock, WAKE_LOCK_SUSPEND, + state->in.wake_lock_name); + rc = setup_misc_device(&state->misc_in, &tegra_audio_in_fops, "audio%d_in", state->pdev->id); |