Implement SNDCTL_DSP_SETDUPLEX. This may fix sound apps which want to

use full duplex mode.

Approved by:	matk

3 files changed, 15 insertions, 0 deletions

diff --git a/sys/compat/linux/linux_ioctl.c b/sys/compat/linux/linux_ioctl.c
index 867a13a..0ee8e8e 100644
--- a/sys/compat/linux/linux_ioctl.c
+++ b/sys/compat/linux/linux_ioctl.c
@@ -1799,6 +1799,10 @@ linux_ioctl_sound(struct thread *td, struct linux_ioctl_args *args)
 		args->cmd = SNDCTL_DSP_GETOPTR;
 		return (ioctl(td, (struct ioctl_args *)args));
 
+	case LINUX_SNDCTL_DSP_SETDUPLEX:
+		args->cmd = SNDCTL_DSP_SETDUPLEX;
+		return (ioctl(td, (struct ioctl_args *)args));
+
 	case LINUX_SNDCTL_DSP_GETODELAY:
 		args->cmd = SNDCTL_DSP_GETODELAY;
 		return (ioctl(td, (struct ioctl_args *)args));
diff --git a/sys/compat/linux/linux_ioctl.h b/sys/compat/linux/linux_ioctl.h
index af1aac7..4d20ab9 100644
--- a/sys/compat/linux/linux_ioctl.h
+++ b/sys/compat/linux/linux_ioctl.h
@@ -254,6 +254,7 @@
 #define	LINUX_SNDCTL_DSP_SETTRIGGER	LINUX_SNDCTL_DSP_GETTRIGGER
 #define	LINUX_SNDCTL_DSP_GETIPTR	0x5011
 #define	LINUX_SNDCTL_DSP_GETOPTR	0x5012
+#define	LINUX_SNDCTL_DSP_SETDUPLEX	0x5016
 #define	LINUX_SNDCTL_DSP_GETODELAY	0x5017
 #define	LINUX_SNDCTL_SEQ_RESET		0x5100
 #define	LINUX_SNDCTL_SEQ_SYNC		0x5101
diff --git a/sys/dev/sound/pcm/dsp.c b/sys/dev/sound/pcm/dsp.c
index 29fe27f..64088f9 100644
--- a/sys/dev/sound/pcm/dsp.c
+++ b/sys/dev/sound/pcm/dsp.c
@@ -1006,6 +1006,15 @@ dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode, struct thread *
 		}
 		break;
 
+	case SNDCTL_DSP_SETDUPLEX:
+		/*
+		 * switch to full-duplex mode if card is in half-duplex
+		 * mode and is able to work in full-duplex mode
+		 */
+		if (rdch && wrch && (dsp_get_flags(i_dev) & SD_F_SIMPLEX))
+			dsp_set_flags(i_dev, dsp_get_flags(i_dev)^SD_F_SIMPLEX);
+		break;
+
     	case SNDCTL_DSP_MAPINBUF:
     	case SNDCTL_DSP_MAPOUTBUF:
     	case SNDCTL_DSP_SETSYNCRO:
@@ -1015,6 +1024,7 @@ dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode, struct thread *
     	case SOUND_PCM_WRITE_FILTER:
     	case SOUND_PCM_READ_FILTER:
 		/* dunno what these do, don't sound important */
+
     	default:
 		DEB(printf("default ioctl fn 0x%08lx fail\n", cmd));
 		ret = EINVAL;