[3/3] ALSA: ump: Export snd_ump_receive_ump_val()

Commit Message

Takashi Iwai June 21, 2023, 11:02 a.m. UTC

This is another preliminary patch for USB MIDI 2.0 gadget driver.
Export the currently local snd_ump_receive_ump_val().  It can be used
by the gadget driver for processing the UMP data.

Signed-off-by: Takashi Iwai <[e-mail]>
---
 include/sound/ump.h |  1 +
 sound/core/ump.c    | 11 ++++++++---
 2 files changed, 9 insertions(+), 3 deletions(-)

Patch

diff --git a/include/sound/ump.h b/include/sound/ump.h
index 2f6a9944c6ef..44d2c2fd021d 100644
--- a/include/sound/ump.h
+++ b/include/sound/ump.h
@@ -109,6 +109,7 @@  static inline int snd_ump_attach_legacy_rawmidi(struct snd_ump_endpoint *ump,
 }
 #endif
 
+int snd_ump_receive_ump_val(struct snd_ump_endpoint *ump, u32 val);
 int snd_ump_switch_protocol(struct snd_ump_endpoint *ump, unsigned int protocol);
 
 /*
diff --git a/sound/core/ump.c b/sound/core/ump.c
index 5e73c9cf5919..5e17351ca984 100644
--- a/sound/core/ump.c
+++ b/sound/core/ump.c
@@ -263,12 +263,16 @@  static unsigned char ump_packet_words[0x10] = {
 	1, 1, 1, 2, 2, 4, 1, 1, 2, 2, 2, 3, 3, 4, 4, 4
 };
 
-/* parse the UMP packet data;
- * the data is copied onto ump->input_buf[].
+/**
+ * snd_ump_receive_ump_val - parse the UMP packet data
+ * @ump: UMP endpoint
+ * @val: UMP packet data
+ *
+ * The data is copied onto ump->input_buf[].
  * When a full packet is completed, returns the number of words (from 1 to 4).
  * OTOH, if the packet is incomplete, returns 0.
  */
-static int snd_ump_receive_ump_val(struct snd_ump_endpoint *ump, u32 val)
+int snd_ump_receive_ump_val(struct snd_ump_endpoint *ump, u32 val)
 {
 	int words;
 
@@ -284,6 +288,7 @@  static int snd_ump_receive_ump_val(struct snd_ump_endpoint *ump, u32 val)
 	}
 	return 0;
 }
+EXPORT_SYMBOL_GPL(snd_ump_receive_ump_val);
 
 /**
  * snd_ump_receive - transfer UMP packets from the device