--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-or-later
+//
+// Special handling for implicit feedback mode
+//
+
+#include <linux/init.h>
+#include <linux/usb.h>
+#include <linux/usb/audio.h>
+#include <linux/usb/audio-v2.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+
+#include "usbaudio.h"
+#include "card.h"
+#include "helper.h"
+#include "implicit.h"
+
+enum {
+ IMPLICIT_FB_NONE,
+ IMPLICIT_FB_FIXED,
+};
+
+struct snd_usb_implicit_fb_match {
+ unsigned int id;
+ unsigned int iface_class;
+ unsigned int ep_num;
+ unsigned int iface;
+ int type;
+};
+
+#define IMPLICIT_FB_FIXED_DEV(vend, prod, ep, ifnum) \
+ { .id = USB_ID(vend, prod), .type = IMPLICIT_FB_FIXED, .ep_num = (ep),\
+ .iface = (ifnum) }
+#define IMPLICIT_FB_SKIP_DEV(vend, prod) \
+ { .id = USB_ID(vend, prod), .type = IMPLICIT_FB_NONE }
+
+/* Implicit feedback quirk table for playback */
+static const struct snd_usb_implicit_fb_match playback_implicit_fb_quirks[] = {
+ /* Fixed EP */
+ IMPLICIT_FB_FIXED_DEV(0x1397, 0x0001, 0x81, 1), /* Behringer UFX1604 */
+ IMPLICIT_FB_FIXED_DEV(0x1397, 0x0002, 0x81, 1), /* Behringer UFX1204 */
+ IMPLICIT_FB_FIXED_DEV(0x0763, 0x2080, 0x81, 2), /* M-Audio FastTrack Ultra */
+ IMPLICIT_FB_FIXED_DEV(0x0763, 0x2081, 0x81, 2), /* M-Audio FastTrack Ultra */
+ IMPLICIT_FB_FIXED_DEV(0x2466, 0x8010, 0x81, 2), /* Fractal Audio Axe-Fx III */
+ IMPLICIT_FB_FIXED_DEV(0x07fd, 0x0008, 0x81, 2), /* MOTU M Series */
+ IMPLICIT_FB_FIXED_DEV(0x31e9, 0x0001, 0x81, 2), /* Solid State Logic SSL2 */
+ IMPLICIT_FB_FIXED_DEV(0x31e9, 0x0002, 0x81, 2), /* Solid State Logic SSL2+ */
+ IMPLICIT_FB_FIXED_DEV(0x0499, 0x172f, 0x81, 2), /* Steinberg UR22C */
+ IMPLICIT_FB_FIXED_DEV(0x0d9a, 0x00df, 0x81, 2), /* RTX6001 */
+ IMPLICIT_FB_FIXED_DEV(0x0763, 0x2030, 0x81, 3), /* M-Audio Fast Track C400 */
+ IMPLICIT_FB_FIXED_DEV(0x0763, 0x2031, 0x81, 3), /* M-Audio Fast Track C600 */
+ IMPLICIT_FB_FIXED_DEV(0x22f0, 0x0006, 0x81, 3), /* Allen&Heath Qu-16 */
+ IMPLICIT_FB_FIXED_DEV(0x2b73, 0x000a, 0x82, 0), /* Pioneer DJ DJM-900NXS2 */
+ IMPLICIT_FB_FIXED_DEV(0x2b73, 0x0017, 0x82, 0), /* Pioneer DJ DJM-250MK2 */
+ IMPLICIT_FB_FIXED_DEV(0x1686, 0xf029, 0x82, 2), /* Zoom UAC-2 */
+ IMPLICIT_FB_FIXED_DEV(0x2466, 0x8003, 0x86, 2), /* Fractal Audio Axe-Fx II */
+ IMPLICIT_FB_FIXED_DEV(0x0499, 0x172a, 0x86, 2), /* Yamaha MODX */
+
+ /* Special matching */
+ { .id = USB_ID(0x07fd, 0x0004), .iface_class = USB_CLASS_AUDIO,
+ .type = IMPLICIT_FB_NONE }, /* MicroBook IIc */
+ /* ep = 0x84, ifnum = 0 */
+ { .id = USB_ID(0x07fd, 0x0004), .iface_class = USB_CLASS_VENDOR_SPEC,
+ .type = IMPLICIT_FB_FIXED,
+ .ep_num = 0x84, .iface = 0 }, /* MOTU MicroBook II */
+
+ /* No quirk */
+ IMPLICIT_FB_SKIP_DEV(0x0582, 0x01d8), /* BOSS Katana */
+
+ /* No quirk for playback but with capture quirk (see below) */
+ IMPLICIT_FB_SKIP_DEV(0x0582, 0x01e5), /* BOSS GT-001 */
+
+ {} /* terminator */
+};
+
+/* Implicit feedback quirk table for capture */
+static const struct snd_usb_implicit_fb_match capture_implicit_fb_quirks[] = {
+ IMPLICIT_FB_FIXED_DEV(0x0582, 0x01e5, 0x0d, 0x01), /* BOSS GT-001 */
+
+ {} /* terminator */
+};
+
+/* set up sync EP information on the audioformat */
+static int add_implicit_fb_sync_ep(struct snd_usb_audio *chip,
+ struct audioformat *fmt,
+ int ep, int ifnum,
+ const struct usb_host_interface *alts)
+{
+ struct usb_interface *iface;
+
+ if (!alts) {
+ iface = usb_ifnum_to_if(chip->dev, ifnum);
+ if (!iface || iface->num_altsetting < 2)
+ return 0;
+ alts = &iface->altsetting[1];
+ }
+
+ fmt->sync_ep = ep;
+ fmt->sync_iface = ifnum;
+ fmt->sync_altsetting = alts->desc.bAlternateSetting;
+ fmt->sync_ep_idx = 0;
+ fmt->implicit_fb = 1;
+ usb_audio_dbg(chip,
+ "%d:%d: added %s implicit_fb sync_ep %x, iface %d:%d\n",
+ fmt->iface, fmt->altsetting,
+ (ep & USB_DIR_IN) ? "playback" : "capture",
+ fmt->sync_ep, fmt->sync_iface, fmt->sync_altsetting);
+ return 1;
+}
+
+/* Check whether the given UAC2 iface:altset points to an implicit fb source */
+static int add_generic_uac2_implicit_fb(struct snd_usb_audio *chip,
+ struct audioformat *fmt,
+ unsigned int ifnum,
+ unsigned int altsetting)
+{
+ struct usb_host_interface *alts;
+ struct usb_endpoint_descriptor *epd;
+
+ alts = snd_usb_get_host_interface(chip, ifnum, altsetting);
+ if (!alts)
+ return 0;
+ if (alts->desc.bInterfaceClass != USB_CLASS_AUDIO ||
+ alts->desc.bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING ||
+ alts->desc.bInterfaceProtocol != UAC_VERSION_2 ||
+ alts->desc.bNumEndpoints < 1)
+ return 0;
+ epd = get_endpoint(alts, 0);
+ if (!usb_endpoint_is_isoc_in(epd) ||
+ (epd->bmAttributes & USB_ENDPOINT_USAGE_MASK) !=
+ USB_ENDPOINT_USAGE_IMPLICIT_FB)
+ return 0;
+ return add_implicit_fb_sync_ep(chip, fmt, epd->bEndpointAddress,
+ ifnum, alts);
+}
+
+/* Like the function above, but specific to Roland with vendor class and hack */
+static int add_roland_implicit_fb(struct snd_usb_audio *chip,
+ struct audioformat *fmt,
+ unsigned int ifnum,
+ unsigned int altsetting)
+{
+ struct usb_host_interface *alts;
+ struct usb_endpoint_descriptor *epd;
+
+ alts = snd_usb_get_host_interface(chip, ifnum, altsetting);
+ if (!alts)
+ return 0;
+ if (alts->desc.bInterfaceClass != USB_CLASS_VENDOR_SPEC ||
+ (alts->desc.bInterfaceSubClass != 2 &&
+ alts->desc.bInterfaceProtocol != 2) ||
+ alts->desc.bNumEndpoints < 1)
+ return 0;
+ epd = get_endpoint(alts, 0);
+ if (!usb_endpoint_is_isoc_in(epd) ||
+ (epd->bmAttributes & USB_ENDPOINT_USAGE_MASK) !=
+ USB_ENDPOINT_USAGE_IMPLICIT_FB)
+ return 0;
+ return add_implicit_fb_sync_ep(chip, fmt, epd->bEndpointAddress,
+ ifnum, alts);
+}
+
+static const struct snd_usb_implicit_fb_match *
+find_implicit_fb_entry(struct snd_usb_audio *chip,
+ const struct snd_usb_implicit_fb_match *match,
+ const struct usb_host_interface *alts)
+{
+ for (; match->id; match++)
+ if (match->id == chip->usb_id &&
+ (!match->iface_class ||
+ (alts->desc.bInterfaceClass == match->iface_class)))
+ return match;
+
+ return NULL;
+}
+
+/* Setup an implicit feedback endpoint from a quirk. Returns 0 if no quirk
+ * applies. Returns 1 if a quirk was found.
+ */
+static int audioformat_implicit_fb_quirk(struct snd_usb_audio *chip,
+ struct audioformat *fmt,
+ struct usb_host_interface *alts)
+{
+ const struct snd_usb_implicit_fb_match *p;
+ unsigned int attr = fmt->ep_attr & USB_ENDPOINT_SYNCTYPE;
+
+ p = find_implicit_fb_entry(chip, playback_implicit_fb_quirks, alts);
+ if (p) {
+ switch (p->type) {
+ case IMPLICIT_FB_NONE:
+ return 0; /* No quirk */
+ case IMPLICIT_FB_FIXED:
+ return add_implicit_fb_sync_ep(chip, fmt, p->ep_num,
+ p->iface, NULL);
+ }
+ }
+
+ /* Generic UAC2 implicit feedback */
+ if (attr == USB_ENDPOINT_SYNC_ASYNC &&
+ alts->desc.bInterfaceClass == USB_CLASS_AUDIO &&
+ alts->desc.bInterfaceProtocol == UAC_VERSION_2 &&
+ alts->desc.bNumEndpoints == 1) {
+ if (add_generic_uac2_implicit_fb(chip, fmt,
+ alts->desc.bInterfaceNumber + 1,
+ alts->desc.bAlternateSetting))
+ return 1;
+ }
+
+ /* Roland/BOSS implicit feedback with vendor spec class */
+ if (attr == USB_ENDPOINT_SYNC_ASYNC &&
+ alts->desc.bInterfaceClass == USB_CLASS_VENDOR_SPEC &&
+ alts->desc.bInterfaceProtocol == 2 &&
+ alts->desc.bNumEndpoints == 1 &&
+ USB_ID_VENDOR(chip->usb_id) == 0x0582 /* Roland */) {
+ if (add_roland_implicit_fb(chip, fmt,
+ alts->desc.bInterfaceNumber + 1,
+ alts->desc.bAlternateSetting))
+ return 1;
+ }
+
+ /* No quirk */
+ return 0;
+}
+
+/* same for capture, but only handling FIXED entry */
+static int audioformat_capture_quirk(struct snd_usb_audio *chip,
+ struct audioformat *fmt,
+ struct usb_host_interface *alts)
+{
+ const struct snd_usb_implicit_fb_match *p;
+
+ p = find_implicit_fb_entry(chip, capture_implicit_fb_quirks, alts);
+ if (p && p->type == IMPLICIT_FB_FIXED)
+ return add_implicit_fb_sync_ep(chip, fmt, p->ep_num, p->iface,
+ NULL);
+ return 0;
+}
+
+/*
+ * Parse altset and set up implicit feedback endpoint on the audioformat
+ */
+int snd_usb_parse_implicit_fb_quirk(struct snd_usb_audio *chip,
+ struct audioformat *fmt,
+ struct usb_host_interface *alts)
+{
+ if (fmt->endpoint & USB_DIR_IN)
+ return audioformat_capture_quirk(chip, fmt, alts);
+ else
+ return audioformat_implicit_fb_quirk(chip, fmt, alts);
+}
+
+/*
+ * Return the score of matching two audioformats.
+ * Veto the audioformat if:
+ * - It has no channels for some reason.
+ * - Requested PCM format is not supported.
+ * - Requested sample rate is not supported.
+ */
+static int match_endpoint_audioformats(struct snd_usb_substream *subs,
+ const struct audioformat *fp,
+ int rate, int channels,
+ snd_pcm_format_t pcm_format)
+{
+ int i, score;
+
+ if (fp->channels < 1)
+ return 0;
+
+ if (!(fp->formats & pcm_format_to_bits(pcm_format)))
+ return 0;
+
+ if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) {
+ if (rate < fp->rate_min || rate > fp->rate_max)
+ return 0;
+ } else {
+ for (i = 0; i < fp->nr_rates; i++) {
+ if (fp->rate_table[i] == rate)
+ break;
+ }
+ if (i >= fp->nr_rates)
+ return 0;
+ }
+
+ score = 1;
+ if (fp->channels == channels)
+ score++;
+
+ return score;
+}
+
+static struct snd_usb_substream *
+find_matching_substream(struct snd_usb_audio *chip, int stream, int ep_num,
+ int fmt_type)
+{
+ struct snd_usb_stream *as;
+ struct snd_usb_substream *subs;
+
+ list_for_each_entry(as, &chip->pcm_list, list) {
+ subs = &as->substream[stream];
+ if (as->fmt_type == fmt_type && subs->ep_num == ep_num)
+ return subs;
+ }
+
+ return NULL;
+}
+
+/*
+ * Return the audioformat that is suitable for the implicit fb
+ */
+const struct audioformat *
+snd_usb_find_implicit_fb_sync_format(struct snd_usb_audio *chip,
+ const struct audioformat *target,
+ const struct snd_pcm_hw_params *params,
+ int stream)
+{
+ struct snd_usb_substream *subs;
+ const struct audioformat *fp, *sync_fmt;
+ int score, high_score;
+
+ /* When sharing the same altset, use the original audioformat */
+ if (target->iface == target->sync_iface &&
+ target->altsetting == target->sync_altsetting)
+ return target;
+
+ subs = find_matching_substream(chip, stream, target->sync_ep,
+ target->fmt_type);
+ if (!subs)
+ return NULL;
+
+ sync_fmt = NULL;
+ high_score = 0;
+ list_for_each_entry(fp, &subs->fmt_list, list) {
+ score = match_endpoint_audioformats(subs, fp,
+ params_rate(params),
+ params_channels(params),
+ params_format(params));
+ if (score > high_score) {
+ sync_fmt = fp;
+ high_score = score;
+ }
+ }
+
+ return sync_fmt;
+}
+
#include "clock.h"
#include "power.h"
#include "media.h"
+#include "implicit.h"
#define SUBSTREAM_FLAG_DATA_EP_STARTED 0
#define SUBSTREAM_FLAG_SYNC_EP_STARTED 1
return 0;
}
-/* Check whether the given iface:altsetting points to an implicit fb source */
-static bool search_generic_implicit_fb(struct snd_usb_audio *chip, int ifnum,
- unsigned int altsetting,
- struct usb_host_interface **altsp,
- unsigned int *ep)
-{
- struct usb_host_interface *alts;
- struct usb_interface_descriptor *altsd;
- struct usb_endpoint_descriptor *epd;
-
- alts = snd_usb_get_host_interface(chip, ifnum, altsetting);
- if (!alts)
- return false;
- altsd = get_iface_desc(alts);
- if (altsd->bInterfaceClass != USB_CLASS_AUDIO ||
- altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING ||
- altsd->bInterfaceProtocol != UAC_VERSION_2 ||
- altsd->bNumEndpoints < 1)
- return false;
- epd = get_endpoint(alts, 0);
- if (!usb_endpoint_is_isoc_in(epd) ||
- (epd->bmAttributes & USB_ENDPOINT_USAGE_MASK) !=
- USB_ENDPOINT_USAGE_IMPLICIT_FB)
- return false;
- *ep = epd->bEndpointAddress;
- *altsp = alts;
- return true;
-}
-
-/* Like the function above, but specific to Roland with vendor class and hack */
-static bool search_roland_implicit_fb(struct snd_usb_audio *chip, int ifnum,
- unsigned int altsetting,
- struct usb_host_interface **altsp,
- unsigned int *ep)
-{
- struct usb_host_interface *alts;
- struct usb_interface_descriptor *altsd;
- struct usb_endpoint_descriptor *epd;
-
- alts = snd_usb_get_host_interface(chip, ifnum, altsetting);
- if (!alts)
- return false;
- altsd = get_iface_desc(alts);
- if (altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC ||
- (altsd->bInterfaceSubClass != 2 &&
- altsd->bInterfaceProtocol != 2) ||
- altsd->bNumEndpoints < 1)
- return false;
- epd = get_endpoint(alts, 0);
- if (!usb_endpoint_is_isoc_in(epd) ||
- (epd->bmAttributes & USB_ENDPOINT_USAGE_MASK) !=
- USB_ENDPOINT_USAGE_IMPLICIT_FB)
- return false;
- *ep = epd->bEndpointAddress;
- *altsp = alts;
- return true;
-}
-
-/* Setup an implicit feedback endpoint from a quirk. Returns 0 if no quirk
- * applies. Returns 1 if a quirk was found.
- */
-static int audioformat_implicit_fb_quirk(struct snd_usb_audio *chip,
- struct audioformat *fmt,
- struct usb_host_interface *alts)
-{
- struct usb_device *dev = chip->dev;
- struct usb_interface_descriptor *altsd = get_iface_desc(alts);
- struct usb_interface *iface;
- unsigned int attr = fmt->ep_attr & USB_ENDPOINT_SYNCTYPE;
- unsigned int ep;
- unsigned int ifnum;
-
- switch (chip->usb_id) {
- case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */
- case USB_ID(0x0763, 0x2031): /* M-Audio Fast Track C600 */
- case USB_ID(0x22f0, 0x0006): /* Allen&Heath Qu-16 */
- ep = 0x81;
- ifnum = 3;
- goto add_sync_ep_from_ifnum;
- case USB_ID(0x0763, 0x2080): /* M-Audio FastTrack Ultra */
- case USB_ID(0x0763, 0x2081):
- ep = 0x81;
- ifnum = 2;
- goto add_sync_ep_from_ifnum;
- case USB_ID(0x2466, 0x8003): /* Fractal Audio Axe-Fx II */
- case USB_ID(0x0499, 0x172a): /* Yamaha MODX */
- ep = 0x86;
- ifnum = 2;
- goto add_sync_ep_from_ifnum;
- case USB_ID(0x2466, 0x8010): /* Fractal Audio Axe-Fx III */
- ep = 0x81;
- ifnum = 2;
- goto add_sync_ep_from_ifnum;
- case USB_ID(0x1686, 0xf029): /* Zoom UAC-2 */
- ep = 0x82;
- ifnum = 2;
- goto add_sync_ep_from_ifnum;
- case USB_ID(0x1397, 0x0001): /* Behringer UFX1604 */
- case USB_ID(0x1397, 0x0002): /* Behringer UFX1204 */
- ep = 0x81;
- ifnum = 1;
- goto add_sync_ep_from_ifnum;
- case USB_ID(0x07fd, 0x0004): /* MOTU MicroBook II/IIc */
- /* MicroBook IIc */
- if (altsd->bInterfaceClass == USB_CLASS_AUDIO)
- return 0;
-
- /* MicroBook II */
- ep = 0x84;
- ifnum = 0;
- goto add_sync_ep_from_ifnum;
- case USB_ID(0x07fd, 0x0008): /* MOTU M Series */
- case USB_ID(0x31e9, 0x0001): /* Solid State Logic SSL2 */
- case USB_ID(0x31e9, 0x0002): /* Solid State Logic SSL2+ */
- case USB_ID(0x0499, 0x172f): /* Steinberg UR22C */
- case USB_ID(0x0d9a, 0x00df): /* RTX6001 */
- ep = 0x81;
- ifnum = 2;
- goto add_sync_ep_from_ifnum;
- case USB_ID(0x2b73, 0x000a): /* Pioneer DJ DJM-900NXS2 */
- case USB_ID(0x2b73, 0x0017): /* Pioneer DJ DJM-250MK2 */
- ep = 0x82;
- ifnum = 0;
- goto add_sync_ep_from_ifnum;
- case USB_ID(0x0582, 0x01d8): /* BOSS Katana */
- /* BOSS Katana amplifiers do not need quirks */
- return 0;
- case USB_ID(0x0582, 0x01e5): /* BOSS GT-001 */
- /* BOSS GT-001 needs no implicit fb for playback */
- return 0;
- }
-
- /* Generic UAC2 implicit feedback */
- if (attr == USB_ENDPOINT_SYNC_ASYNC &&
- altsd->bInterfaceClass == USB_CLASS_AUDIO &&
- altsd->bInterfaceProtocol == UAC_VERSION_2 &&
- altsd->bNumEndpoints == 1) {
- ifnum = altsd->bInterfaceNumber + 1;
- if (search_generic_implicit_fb(chip, ifnum,
- altsd->bAlternateSetting,
- &alts, &ep))
- goto add_sync_ep;
- }
-
- /* Roland/BOSS implicit feedback with vendor spec class */
- if (attr == USB_ENDPOINT_SYNC_ASYNC &&
- altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC &&
- altsd->bInterfaceProtocol == 2 &&
- altsd->bNumEndpoints == 1 &&
- USB_ID_VENDOR(chip->usb_id) == 0x0582 /* Roland */) {
- ifnum = altsd->bInterfaceNumber + 1;
- if (search_roland_implicit_fb(chip, ifnum,
- altsd->bAlternateSetting,
- &alts, &ep))
- goto add_sync_ep;
- }
-
- /* No quirk */
- return 0;
-
-add_sync_ep_from_ifnum:
- iface = usb_ifnum_to_if(dev, ifnum);
-
- if (!iface || iface->num_altsetting < 2)
- return 0;
-
- alts = &iface->altsetting[1];
-
-add_sync_ep:
- fmt->sync_ep = ep;
- fmt->sync_iface = ifnum;
- fmt->sync_altsetting = alts->desc.bAlternateSetting;
- fmt->sync_ep_idx = 0;
- fmt->implicit_fb = 1;
- dev_dbg(&dev->dev, "%d:%d: found implicit_fb sync_ep=%x, iface=%d, alt=%d\n",
- fmt->iface, fmt->altsetting, fmt->sync_ep, fmt->sync_iface,
- fmt->sync_altsetting);
-
- return 1;
-}
-
-static int audioformat_capture_quirk(struct snd_usb_audio *chip,
- struct audioformat *fmt,
- struct usb_host_interface *alts)
-{
- struct usb_device *dev = chip->dev;
-
- switch (chip->usb_id) {
- case USB_ID(0x0582, 0x01e5): /* BOSS GT-001 */
- if (!snd_usb_get_host_interface(chip, 0x01, 0x01))
- return 0;
- fmt->sync_ep = 0x0d;
- fmt->sync_iface = 0x01;
- fmt->sync_altsetting = 0x01;
- fmt->sync_ep_idx = 0;
- fmt->implicit_fb = 1;
- dev_dbg(&dev->dev, "%d:%d: added fake capture sync sync_ep=%x, iface=%d, alt=%d\n",
- fmt->iface, fmt->altsetting, fmt->sync_ep, fmt->sync_iface,
- fmt->sync_altsetting);
- return 1;
- }
- return 0;
-
-}
-
+/* Set up sync endpoint */
int snd_usb_audioformat_set_sync_ep(struct snd_usb_audio *chip,
struct audioformat *fmt)
{
return 0;
altsd = get_iface_desc(alts);
- is_playback = !(get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN);
- if (is_playback) {
- err = audioformat_implicit_fb_quirk(chip, fmt, alts);
- if (err > 0)
- return 0;
- } else {
- err = audioformat_capture_quirk(chip, fmt, alts);
- if (err > 0)
- return 0;
- }
+ err = snd_usb_parse_implicit_fb_quirk(chip, fmt, alts);
+ if (err > 0)
+ return 0; /* matched */
+
+ /*
+ * Generic sync EP handling
+ */
if (altsd->bNumEndpoints < 2)
return 0;
+ is_playback = !(get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN);
attr = fmt->ep_attr & USB_ENDPOINT_SYNCTYPE;
if ((is_playback && (attr == USB_ENDPOINT_SYNC_SYNC ||
attr == USB_ENDPOINT_SYNC_ADAPTIVE)) ||
return 0;
}
-/*
- * Return the score of matching two audioformats.
- * Veto the audioformat if:
- * - It has no channels for some reason.
- * - Requested PCM format is not supported.
- * - Requested sample rate is not supported.
- */
-static int match_endpoint_audioformats(struct snd_usb_substream *subs,
- const struct audioformat *fp,
- int rate, int channels,
- snd_pcm_format_t pcm_format)
-{
- int i, score;
-
- if (fp->channels < 1)
- return 0;
-
- if (!(fp->formats & pcm_format_to_bits(pcm_format)))
- return 0;
-
- if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) {
- if (rate < fp->rate_min || rate > fp->rate_max)
- return 0;
- } else {
- for (i = 0; i < fp->nr_rates; i++) {
- if (fp->rate_table[i] == rate)
- break;
- }
- if (i >= fp->nr_rates)
- return 0;
- }
-
- score = 1;
- if (fp->channels == channels)
- score++;
-
- return score;
-}
-
static int snd_usb_pcm_change_state(struct snd_usb_substream *subs, int state)
{
int ret;
return 0;
}
-static struct snd_usb_substream *
-find_matching_substream(struct snd_usb_audio *chip, int stream, int ep_num,
- int fmt_type)
-{
- struct snd_usb_stream *as;
- struct snd_usb_substream *subs;
-
- list_for_each_entry(as, &chip->pcm_list, list) {
- subs = &as->substream[stream];
- if (as->fmt_type == fmt_type && subs->ep_num == ep_num)
- return subs;
- }
-
- return NULL;
-}
-
-static const struct audioformat *
-find_implicit_fb_sync_format(struct snd_usb_audio *chip,
- const struct audioformat *target,
- const struct snd_pcm_hw_params *params,
- int stream)
-{
- struct snd_usb_substream *subs;
- const struct audioformat *fp, *sync_fmt;
- int score, high_score;
-
- subs = find_matching_substream(chip, stream, target->sync_ep,
- target->fmt_type);
- if (!subs)
- return NULL;
-
- sync_fmt = NULL;
- high_score = 0;
- list_for_each_entry(fp, &subs->fmt_list, list) {
- score = match_endpoint_audioformats(subs, fp,
- params_rate(params),
- params_channels(params),
- params_format(params));
- if (score > high_score) {
- sync_fmt = fp;
- high_score = score;
- }
- }
-
- return sync_fmt;
-}
-
static void close_endpoints(struct snd_usb_audio *chip,
struct snd_usb_substream *subs)
{
goto stop_pipeline;
}
- if (fmt->implicit_fb &&
- (fmt->iface != fmt->sync_iface ||
- fmt->altsetting != fmt->sync_altsetting)) {
- sync_fmt = find_implicit_fb_sync_format(chip, fmt, hw_params,
- !substream->stream);
+ if (fmt->implicit_fb) {
+ sync_fmt = snd_usb_find_implicit_fb_sync_format(chip, fmt,
+ hw_params,
+ !substream->stream);
if (!sync_fmt) {
usb_audio_dbg(chip,
"cannot find sync format: ep=0x%x, iface=%d:%d, format=%s, rate=%d, channels=%d\n",
projects / platform / kernel / linux-rpi.git / commitdiff