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usb: gadget: f_uac2: Add missing companion descriptor for feedback EP

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The f_uac2 function fails to enumerate when connected in SuperSpeed
due to the feedback endpoint missing the companion descriptor.
Add a new ss_epin_fback_desc_comp descriptor and append it behind the
ss_epin_fback_desc both in the static definition of the ss_audio_desc
structure as well as its dynamic construction in setup_headers().

Fixes: 24f779dac8 ("usb: gadget: f_uac2/u_audio: add feedback endpoint support")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Jack Pham <jackp@codeaurora.org>
Link: https://lore.kernel.org/r/20210909174811.12534-2-jackp@codeaurora.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jack Pham 2021-09-09 10:48:10 -07:00 committed by Greg Kroah-Hartman
parent dbe2518b2d
commit 595091a142
1 changed files with 15 additions and 1 deletions
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16
drivers/usb/gadget/function/f_uac2.c
View file

@ -406,6 +406,14 @@ static struct usb_endpoint_descriptor ss_epin_fback_desc = {
.bInterval = 4,
};
static struct usb_ss_ep_comp_descriptor ss_epin_fback_desc_comp = {
.bLength = sizeof(ss_epin_fback_desc_comp),
.bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
.bMaxBurst = 0,
.bmAttributes = 0,
.wBytesPerInterval = cpu_to_le16(4),
};
/* Audio Streaming IN Interface - Alt0 */
static struct usb_interface_descriptor std_as_in_if0_desc = {
@ -597,6 +605,7 @@ static struct usb_descriptor_header *ss_audio_desc[] = {
(struct usb_descriptor_header *)&ss_epout_desc_comp,
(struct usb_descriptor_header *)&as_iso_out_desc,
(struct usb_descriptor_header *)&ss_epin_fback_desc,
(struct usb_descriptor_header *)&ss_epin_fback_desc_comp,
(struct usb_descriptor_header *)&std_as_in_if0_desc,
(struct usb_descriptor_header *)&std_as_in_if1_desc,
@ -705,6 +714,7 @@ static void setup_headers(struct f_uac2_opts *opts,
{
struct usb_ss_ep_comp_descriptor *epout_desc_comp = NULL;
struct usb_ss_ep_comp_descriptor *epin_desc_comp = NULL;
struct usb_ss_ep_comp_descriptor *epin_fback_desc_comp = NULL;
struct usb_endpoint_descriptor *epout_desc;
struct usb_endpoint_descriptor *epin_desc;
struct usb_endpoint_descriptor *epin_fback_desc;
@ -730,6 +740,7 @@ static void setup_headers(struct f_uac2_opts *opts,
epout_desc_comp = &ss_epout_desc_comp;
epin_desc_comp = &ss_epin_desc_comp;
epin_fback_desc = &ss_epin_fback_desc;
epin_fback_desc_comp = &ss_epin_fback_desc_comp;
ep_int_desc = &ss_ep_int_desc;
}
@ -773,8 +784,11 @@ static void setup_headers(struct f_uac2_opts *opts,
headers[i++] = USBDHDR(&as_iso_out_desc);
if (EPOUT_FBACK_IN_EN(opts))
if (EPOUT_FBACK_IN_EN(opts)) {
headers[i++] = USBDHDR(epin_fback_desc);
if (epin_fback_desc_comp)
headers[i++] = USBDHDR(epin_fback_desc_comp);
}
}
if (EPIN_EN(opts)) {