ALSA: core: add support for compressed devices

Use the minor numbers 2 and 3 for audio compressed offload devices.
Also add support for these devices in core

Signed-off-by: Omair Mohammed Abdullah <omair.m.abdullah@intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
Reviewed-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

2 files changed, 4 insertions, 1 deletions

diff --git a/include/sound/core.h b/include/sound/core.h
index 3be5ab782b99..5ab255f196cc 100644
--- a/include/sound/core.h
+++ b/include/sound/core.h
@@ -62,6 +62,7 @@ typedef int __bitwise snd_device_type_t;
 #define SNDRV_DEV_BUS           ((__force snd_device_type_t) 0x1007)
 #define SNDRV_DEV_CODEC         ((__force snd_device_type_t) 0x1008)
 #define SNDRV_DEV_JACK          ((__force snd_device_type_t) 0x1009)
+#define SNDRV_DEV_COMPRESS      ((__force snd_device_type_t) 0x100A)
 #define SNDRV_DEV_LOWLEVEL      ((__force snd_device_type_t) 0x2000)
 
 typedef int __bitwise snd_device_state_t;
diff --git a/include/sound/minors.h b/include/sound/minors.h
index 8f764204a856..5978f9a8c8b2 100644
--- a/include/sound/minors.h
+++ b/include/sound/minors.h
@@ -35,7 +35,7 @@
 #define SNDRV_MINOR_TIMER               33      /* SNDRV_MINOR_GLOBAL + 1 * 32 */
 
 #ifndef CONFIG_SND_DYNAMIC_MINORS
-                                                /* 2 - 3 (reserved) */
+#define SNDRV_MINOR_COMPRESS            2       /* 2 - 3 */
 #define SNDRV_MINOR_HWDEP               4       /* 4 - 7 */
 #define SNDRV_MINOR_RAWMIDI             8       /* 8 - 15 */
 #define SNDRV_MINOR_PCM_PLAYBACK        16      /* 16 - 23 */
@@ -49,6 +49,7 @@
 #define SNDRV_DEVICE_TYPE_PCM_CAPTURE   SNDRV_MINOR_PCM_CAPTURE
 #define SNDRV_DEVICE_TYPE_SEQUENCER     SNDRV_MINOR_SEQUENCER
 #define SNDRV_DEVICE_TYPE_TIMER         SNDRV_MINOR_TIMER
+#define SNDRV_DEVICE_TYPE_COMPRESS      SNDRV_MINOR_COMPRESS
 
 #else /* CONFIG_SND_DYNAMIC_MINORS */
 
@@ -60,6 +61,7 @@ enum {
         SNDRV_DEVICE_TYPE_RAWMIDI,
         SNDRV_DEVICE_TYPE_PCM_PLAYBACK,
         SNDRV_DEVICE_TYPE_PCM_CAPTURE,
+        SNDRV_DEVICE_TYPE_COMPRESS,
 };
 
 #endif /* CONFIG_SND_DYNAMIC_MINORS */