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authorMartin Koegler <martin.koegler@chello.at>2016-03-02 19:26:28 +0100
committerTakashi Iwai <tiwai@suse.de>2016-03-08 10:52:52 +0100
commita1ce94d03bfdfaa1ef31c1a84383105888ac5f3b (patch)
treedcd0595298350887b43b59d79dcc05779e26a458 /include/uapi/sound/asequencer.h
parent56d94d70398f0fbb1863a03a145db1a86f009a71 (diff)
ALSA: seq: Provide card number / PID via sequencer client info
rawmidi devices expose the card number via IOCTLs, which allows to find the corresponding device in sysfs. The sequencer provides no identifing data. Chromium works around this issue by scanning rawmidi as well as sequencer devices and matching them by using assumtions, how the kernel register sequencer devices. This changes adds support for exposing the card number for kernel clients as well as the PID for user client. The minor of the API version is changed to distinguish between the zero initialised reserved field and card number 0. [minor coding style fixes by tiwai] Signed-off-by: Martin Koegler <martin.koegler@chello.at> Acked-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'include/uapi/sound/asequencer.h')
-rw-r--r--include/uapi/sound/asequencer.h6
1 files changed, 4 insertions, 2 deletions
diff --git a/include/uapi/sound/asequencer.h b/include/uapi/sound/asequencer.h
index af96f2044f91..7b7659a79ac4 100644
--- a/include/uapi/sound/asequencer.h
+++ b/include/uapi/sound/asequencer.h
@@ -25,7 +25,7 @@
#include <sound/asound.h>
/** version of the sequencer */
-#define SNDRV_SEQ_VERSION SNDRV_PROTOCOL_VERSION (1, 0, 1)
+#define SNDRV_SEQ_VERSION SNDRV_PROTOCOL_VERSION(1, 0, 2)
/**
* definition of sequencer event types
@@ -357,7 +357,9 @@ struct snd_seq_client_info {
unsigned char event_filter[32]; /* event filter bitmap */
int num_ports; /* RO: number of ports */
int event_lost; /* number of lost events */
- char reserved[64]; /* for future use */
+ int card; /* RO: card number[kernel] */
+ int pid; /* RO: pid[user] */
+ char reserved[56]; /* for future use */
};

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