Dne 21. 12. 21 v 12:35 John Keeping napsal(a):

On Mon, Dec 20, 2021 at 10:11:21PM +0100, Pavel Hofman wrote:

quoted

From: Julian Scheel <redacted>

Implement support for multiple sampling rates in u_audio part of the
audio gadget. The currently configured rates are exposed through
read-only amixer controls 'Capture Rate' and 'Playback Rate'.

Signed-off-by: Julian Scheel <redacted>
Signed-off-by: Pavel Hofman <redacted>
---

quoted

diff --git a/drivers/usb/gadget/function/uac_common.h b/drivers/usb/gadget/function/uac_common.h
new file mode 100644
index 000000000000..3ecf89d6e814
--- /dev/null
+++ b/drivers/usb/gadget/function/uac_common.h

@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ */
+
+#ifndef UAC_COMMON_H
+#define UAC_COMMON_H
+
+#define UAC_MAX_RATES 10 /* maximum number of rates configurable by f_uac1/2 */

Why a new header for this - doesn't it belong in u_audio.h?

The constant is used in subsequent patches in f_uac1.c, f_uac2.c, their 
headers u_uac1.h, u_uac2.h, and legacy/audio.c (which already includes 
u_uac1.h/u_uac2.h as needed). Since all occurences must use the same 
value, I did not know how to solve this without introducing a common 
header file, included in the existing headers u_audio.h, u_uac1.h, 
u_uac2.h. If there is a better way, I will be happy to use it, I do not 
like the extra common header file either. Thanks a lot for your help.

Pavel.