ALSA: pcm: Add an ioctl to specify the supported protocol version

[mirror_ubuntu-jammy-kernel.git] / include / sound / pcm.h

diff --git a/include/sound/pcm.h b/include/sound/pcm.h
index 5a22075c5fcf91a9f3d2000e82d9d2ef5a633c61..24febf9e177c4b80547c9fd417d687537483ab5a 100644 (file)
--- a/include/sound/pcm.h
+++ b/include/sound/pcm.h
@@ -218,6 +218,7 @@ struct snd_pcm_ops {
 struct snd_pcm_file {
        struct snd_pcm_substream *substream;
        int no_compat_mmap;
+       unsigned int user_pversion;     /* supported protocol version */
 };
 
 struct snd_pcm_hw_rule;