In order to get UAC1 working with my Ubuntu 12.04 LTS host, I have to make a
few changes to driver/usb/gadget/f_uac1.c
what changes ? care to send a patch ? Why do you need such change ? Are
you fixing a bug ?
Felipe,
Thanks. I have to apply below patch to fix the "-22" issue.
From: Xuebing Wang <xbing6@xxxxxxxxx>
Date: Wed, 20 Aug 2014 12:36:54 +0800
Subject: [PATCH 1/2] UAC1: enable USB gadget Audio Class revision 1.0
Fix below error message issue:
g_audio gadget: ep1out queue req: err = -22
This issue was observed on Freescale i.MX6SL EVK, kernel version 3.10.17
Signed-off-by: Xuebing Wang <xbing6@xxxxxxxxx>
---
arch/arm/configs/imx_v7_defconfig | 2 ++
drivers/usb/gadget/f_uac1.c | 2 ++
2 files changed, 4 insertions(+)
diff --git a/arch/arm/configs/imx_v7_defconfig
b/arch/arm/configs/imx_v7_defconfig
index b8d6ceb..30020d3 100644
--- a/arch/arm/configs/imx_v7_defconfig
+++ b/arch/arm/configs/imx_v7_defconfig
@@ -249,6 +249,8 @@ CONFIG_USB_PHY=y
CONFIG_NOP_USB_XCEIV=y
CONFIG_USB_MXS_PHY=y
CONFIG_USB_GADGET=y
+CONFIG_GADGET_UAC1=y
+CONFIG_USB_AUDIO=m
CONFIG_USB_ZERO=m
CONFIG_USB_ETH=m
CONFIG_USB_MASS_STORAGE=m
diff --git a/drivers/usb/gadget/f_uac1.c b/drivers/usb/gadget/f_uac1.c
index fa8ea4e..055961a 100644
--- a/drivers/usb/gadget/f_uac1.c
+++ b/drivers/usb/gadget/f_uac1.c
@@ -544,6 +544,7 @@ static int f_audio_set_alt(struct usb_function *f,
unsigned intf, unsigned alt)
{
struct f_audio *audio = func_to_audio(f);
struct usb_composite_dev *cdev = f->config->cdev;
+ struct usb_gadget *gadget = cdev->gadget;
struct usb_ep *out_ep = audio->out_ep;
struct usb_request *req;
int i = 0, err = 0;
@@ -552,6 +553,7 @@ static int f_audio_set_alt(struct usb_function *f,
unsigned intf, unsigned alt)
if (intf == 1) {
if (alt == 1) {
+ config_ep_by_speed(gadget, f, out_ep);
usb_ep_enable(out_ep);
out_ep->driver_data = audio;
audio->copy_buf = f_audio_buffer_alloc(audio_buf_size);
--
2.0.1
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