diff options
Diffstat (limited to 'arch/arm/mach-tegra/tegra_i2s_audio.c')
| -rw-r--r-- | arch/arm/mach-tegra/tegra_i2s_audio.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/tegra_i2s_audio.c b/arch/arm/mach-tegra/tegra_i2s_audio.c index 40653570f87a..47626e103e8d 100644 --- a/arch/arm/mach-tegra/tegra_i2s_audio.c +++ b/arch/arm/mach-tegra/tegra_i2s_audio.c @@ -1262,6 +1262,26 @@ static long tegra_audio_out_ioctl(struct file *file, if (!rc) aos->errors = 0; break; + case TEGRA_AUDIO_OUT_PRELOAD_FIFO: { + struct tegra_audio_out_preload preload; + if (copy_from_user(&preload, (void __user *)arg, + sizeof(preload))) { + rc = -EFAULT; + break; + } + rc = kfifo_from_user(&ads->out.fifo, + (void __user *)preload.data, preload.len, + &preload.len_written); + if (rc < 0) { + pr_err("%s: error copying from user\n", __func__); + break; + } + if (copy_to_user((void __user *)arg, &preload, sizeof(preload))) + rc = -EFAULT; + pr_info("%s: preloaded output fifo with %d bytes\n", __func__, + preload.len_written); + } + break; default: rc = -EINVAL; } |