@@ -1297,7 +1297,6 @@ static int f_audio_bind(struct usb_configuration *c, struct usb_function *f)
audio->out_ep_maxpsize = le16_to_cpu(as_out_ep_desc.wMaxPacketSize);
audio->in_ep_maxpsize = le16_to_cpu(as_in_ep_desc.wMaxPacketSize);
audio->params.c_chmask = audio_opts->c_chmask;
- audio->params.c_srate = audio_opts->c_srate;
audio->params.c_srates[0] = audio_opts->c_srate;
audio->params.c_ssize = audio_opts->c_ssize;
if (FUIN_EN(audio_opts)) {
@@ -1310,7 +1309,6 @@ static int f_audio_bind(struct usb_configuration *c, struct usb_function *f)
audio->params.p_fu.volume_res = audio_opts->p_volume_res;
}
audio->params.p_chmask = audio_opts->p_chmask;
- audio->params.p_srate = audio_opts->p_srate;
audio->params.p_srates[0] = audio_opts->p_srate;
audio->params.p_ssize = audio_opts->p_ssize;
if (FUOUT_EN(audio_opts)) {
@@ -1209,7 +1209,6 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn)
agdev->gadget = gadget;
agdev->params.p_chmask = uac2_opts->p_chmask;
- agdev->params.p_srate = uac2_opts->p_srate;
agdev->params.p_srates[0] = uac2_opts->p_srate;
agdev->params.p_ssize = uac2_opts->p_ssize;
if (FUIN_EN(uac2_opts)) {
@@ -1221,7 +1220,6 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn)
agdev->params.p_fu.volume_res = uac2_opts->p_volume_res;
}
agdev->params.c_chmask = uac2_opts->c_chmask;
- agdev->params.c_srate = uac2_opts->c_srate;
agdev->params.c_srates[0] = uac2_opts->c_srate;
agdev->params.c_ssize = uac2_opts->c_ssize;
if (FUOUT_EN(uac2_opts)) {
@@ -64,6 +64,7 @@ struct uac_rtd_params {
int mute;
struct snd_kcontrol *snd_kctl_rate; /* read-only current rate */
+ int srate; /* selected samplerate */
spinlock_t lock; /* lock for control transfers */
@@ -153,8 +154,6 @@ static void u_audio_iso_complete(struct usb_ep *ep, struct usb_request *req)
struct snd_pcm_runtime *runtime;
struct uac_rtd_params *prm = req->context;
struct snd_uac_chip *uac = prm->uac;
- struct g_audio *audio_dev = uac->audio_dev;
- struct uac_params *params = &audio_dev->params;
unsigned int frames, p_pktsize;
unsigned long long pitched_rate_mil, p_pktsize_residue_mil,
residue_frames_mil, div_result;
@@ -199,15 +198,14 @@ static void u_audio_iso_complete(struct usb_ep *ep, struct usb_request *req)
*/
unsigned long long p_interval_mil = uac->p_interval * 1000000ULL;
- pitched_rate_mil = (unsigned long long)
- params->p_srate * prm->pitch;
+ pitched_rate_mil = (unsigned long long) prm->srate * prm->pitch;
div_result = pitched_rate_mil;
do_div(div_result, uac->p_interval);
do_div(div_result, 1000000);
frames = (unsigned int) div_result;
pr_debug("p_srate %d, pitch %d, interval_mil %llu, frames %d\n",
- params->p_srate, prm->pitch, p_interval_mil, frames);
+ prm->srate, prm->pitch, p_interval_mil, frames);
p_pktsize = min_t(unsigned int,
uac->p_framesize * frames,
@@ -284,7 +282,6 @@ static void u_audio_iso_fback_complete(struct usb_ep *ep,
struct uac_rtd_params *prm = req->context;
struct snd_uac_chip *uac = prm->uac;
struct g_audio *audio_dev = uac->audio_dev;
- struct uac_params *params = &audio_dev->params;
int status = req->status;
/* i/f shutting down */
@@ -306,7 +303,7 @@ static void u_audio_iso_fback_complete(struct usb_ep *ep,
__func__, status, req->actual, req->length);
u_audio_set_fback_frequency(audio_dev->gadget->speed, audio_dev->out_ep,
- params->c_srate, prm->pitch,
+ prm->srate, prm->pitch,
req->buf);
if (usb_ep_queue(ep, req, GFP_ATOMIC))
@@ -390,16 +387,14 @@ static int uac_pcm_open(struct snd_pcm_substream *substream)
struct snd_pcm_runtime *runtime = substream->runtime;
struct g_audio *audio_dev;
struct uac_params *params;
+ struct uac_rtd_params *prm;
int p_ssize, c_ssize;
- int p_srate, c_srate;
int p_chmask, c_chmask;
audio_dev = uac->audio_dev;
params = &audio_dev->params;
p_ssize = params->p_ssize;
c_ssize = params->c_ssize;
- p_srate = params->p_srate;
- c_srate = params->c_srate;
p_chmask = params->p_chmask;
c_chmask = params->c_chmask;
uac->p_residue_mil = 0;
@@ -407,19 +402,18 @@ static int uac_pcm_open(struct snd_pcm_substream *substream)
runtime->hw = uac_pcm_hardware;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
- runtime->hw.rate_min = p_srate;
runtime->hw.formats = uac_ssize_to_fmt(p_ssize);
runtime->hw.channels_min = num_channels(p_chmask);
- runtime->hw.period_bytes_min = 2 * uac->p_prm.max_psize
- / runtime->hw.periods_min;
+ prm = &uac->p_prm;
} else {
- runtime->hw.rate_min = c_srate;
runtime->hw.formats = uac_ssize_to_fmt(c_ssize);
runtime->hw.channels_min = num_channels(c_chmask);
- runtime->hw.period_bytes_min = 2 * uac->c_prm.max_psize
- / runtime->hw.periods_min;
+ prm = &uac->c_prm;
}
+ runtime->hw.period_bytes_min = 2 * prm->max_psize
+ / runtime->hw.periods_min;
+ runtime->hw.rate_min = prm->srate;
runtime->hw.rate_max = runtime->hw.rate_min;
runtime->hw.channels_max = runtime->hw.channels_min;
@@ -499,12 +493,18 @@ static inline void free_ep_fback(struct uac_rtd_params *prm, struct usb_ep *ep)
int u_audio_set_capture_srate(struct g_audio *audio_dev, int srate)
{
struct uac_params *params = &audio_dev->params;
+ struct snd_uac_chip *uac = audio_dev->uac;
+ struct uac_rtd_params *prm;
int i;
+ unsigned long flags;
dev_dbg(&audio_dev->gadget->dev, "%s: srate %d\n", __func__, srate);
+ prm = &uac->c_prm;
for (i = 0; i < UAC_MAX_RATES; i++) {
if (params->c_srates[i] == srate) {
- params->c_srate = srate;
+ spin_lock_irqsave(&prm->lock, flags);
+ prm->srate = srate;
+ spin_unlock_irqrestore(&prm->lock, flags);
return 0;
}
if (params->c_srates[i] == 0)
@@ -518,12 +518,18 @@ EXPORT_SYMBOL_GPL(u_audio_set_capture_srate);
int u_audio_set_playback_srate(struct g_audio *audio_dev, int srate)
{
struct uac_params *params = &audio_dev->params;
+ struct snd_uac_chip *uac = audio_dev->uac;
+ struct uac_rtd_params *prm;
int i;
+ unsigned long flags;
dev_dbg(&audio_dev->gadget->dev, "%s: srate %d\n", __func__, srate);
+ prm = &uac->p_prm;
for (i = 0; i < UAC_MAX_RATES; i++) {
if (params->p_srates[i] == srate) {
- params->p_srate = srate;
+ spin_lock_irqsave(&prm->lock, flags);
+ prm->srate = srate;
+ spin_unlock_irqrestore(&prm->lock, flags);
return 0;
}
if (params->p_srates[i] == 0)
@@ -545,9 +551,9 @@ int u_audio_start_capture(struct g_audio *audio_dev)
struct uac_params *params = &audio_dev->params;
int req_len, i;
- dev_dbg(dev, "start capture with rate %d\n", params->c_srate);
- ep = audio_dev->out_ep;
prm = &uac->c_prm;
+ dev_dbg(dev, "start capture with rate %d\n", prm->srate);
+ ep = audio_dev->out_ep;
config_ep_by_speed(gadget, &audio_dev->func, ep);
req_len = ep->maxpacket;
@@ -604,7 +610,7 @@ int u_audio_start_capture(struct g_audio *audio_dev)
*/
prm->pitch = 1000000;
u_audio_set_fback_frequency(audio_dev->gadget->speed, ep,
- params->c_srate, prm->pitch,
+ prm->srate, prm->pitch,
req_fback->buf);
if (usb_ep_queue(ep_fback, req_fback, GFP_ATOMIC))
@@ -638,9 +644,9 @@ int u_audio_start_playback(struct g_audio *audio_dev)
int req_len, i;
unsigned int p_pktsize;
- dev_dbg(dev, "start playback with rate %d\n", params->p_srate);
- ep = audio_dev->in_ep;
prm = &uac->p_prm;
+ dev_dbg(dev, "start playback with rate %d\n", prm->srate);
+ ep = audio_dev->in_ep;
config_ep_by_speed(gadget, &audio_dev->func, ep);
ep_desc = ep->desc;
@@ -661,7 +667,7 @@ int u_audio_start_playback(struct g_audio *audio_dev)
uac->p_interval = factor / (1 << (ep_desc->bInterval - 1));
p_pktsize = min_t(unsigned int,
uac->p_framesize *
- (params->p_srate / uac->p_interval),
+ (prm->srate / uac->p_interval),
ep->maxpacket);
req_len = p_pktsize;
@@ -1037,15 +1043,11 @@ static int u_audio_rate_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct uac_rtd_params *prm = snd_kcontrol_chip(kcontrol);
- struct snd_uac_chip *uac = prm->uac;
- struct g_audio *audio_dev = uac->audio_dev;
- struct uac_params *params = &audio_dev->params;
-
- if (prm == &uac->c_prm)
- ucontrol->value.integer.value[0] = params->c_srate;
- else
- ucontrol->value.integer.value[0] = params->p_srate;
+ unsigned long flags;
+ spin_lock_irqsave(&prm->lock, flags);
+ ucontrol->value.integer.value[0] = prm->srate;
+ spin_unlock_irqrestore(&prm->lock, flags);
return 0;
}
@@ -1117,6 +1119,7 @@ int g_audio_setup(struct g_audio *g_audio, const char *pcm_name,
spin_lock_init(&prm->lock);
uac->c_prm.uac = uac;
prm->max_psize = g_audio->out_ep_maxpsize;
+ prm->srate = params->c_srates[0];
prm->reqs = kcalloc(params->req_number,
sizeof(struct usb_request *),
@@ -1141,6 +1144,7 @@ int g_audio_setup(struct g_audio *g_audio, const char *pcm_name,
spin_lock_init(&prm->lock);
uac->p_prm.uac = uac;
prm->max_psize = g_audio->in_ep_maxpsize;
+ prm->srate = params->p_srates[0];
prm->reqs = kcalloc(params->req_number,
sizeof(struct usb_request *),
@@ -42,17 +42,17 @@ struct uac_params {
/* playback */
int p_chmask; /* channel mask */
int p_srates[UAC_MAX_RATES]; /* available rates in Hz (0 terminated list) */
- int p_srate; /* selected rate in Hz */
int p_ssize; /* sample size */
struct uac_fu_params p_fu; /* Feature Unit parameters */
/* capture */
int c_chmask; /* channel mask */
int c_srates[UAC_MAX_RATES]; /* available rates in Hz (0 terminated list) */
- int c_srate; /* selected rate in Hz */
int c_ssize; /* sample size */
struct uac_fu_params c_fu; /* Feature Unit parameters */
+ /* rates are dynamic, in uac_rtd_params */
+
int req_number; /* number of preallocated requests */
int fb_max; /* upper frequency drift feedback limit per-mil */
};
Parameters uac_params.p_srate/c_srate are dynamic now and are not part of parametric configuration anymore. Move them to the runtime struct uac_rtd_params for each stream. Signed-off-by: Pavel Hofman <pavel.hofman@ivitera.com> Suggested-by: John Keeping <john@metanate.com> --- v3: new patch v4: added Suggested-by to commit msg --- drivers/usb/gadget/function/f_uac1.c | 2 - drivers/usb/gadget/function/f_uac2.c | 2 - drivers/usb/gadget/function/u_audio.c | 68 ++++++++++++++------------- drivers/usb/gadget/function/u_audio.h | 4 +- 4 files changed, 38 insertions(+), 38 deletions(-)