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ALSA: usb-audio: Add clock validity quirk for Denon MC7000/MCX8000

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It should be safe to ignore clock validity check result if the following
conditions are met:
 - only one single sample rate is supported;
 - the terminal is directly connected to the clock source;
 - the clock type is internal.

This is to deal with some Denon DJ controllers that always reports that
clock is invalid.

Tested-by: Tobias Oszlanyi <toszlanyi@yahoo.de>
Signed-off-by: Alexander Tsoy <alexander@tsoy.me>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200212235450.697348-1-alexander@tsoy.me
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Alexander Tsoy 2020-02-13 02:54:50 +03:00 committed by Takashi Iwai
parent 7dafba3762
commit 9f35a31283
3 changed files with 66 additions and 32 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

81
sound/usb/clock.c
View File

@ -151,8 +151,34 @@ static int uac_clock_selector_set_val(struct snd_usb_audio *chip, int selector_i
return ret;
}
/*
* Assume the clock is valid if clock source supports only one single sample
* rate, the terminal is connected directly to it (there is no clock selector)
* and clock type is internal. This is to deal with some Denon DJ controllers
* that always reports that clock is invalid.
*/
static bool uac_clock_source_is_valid_quirk(struct snd_usb_audio *chip,
struct audioformat *fmt,
int source_id)
{
if (fmt->protocol == UAC_VERSION_2) {
struct uac_clock_source_descriptor *cs_desc =
snd_usb_find_clock_source(chip->ctrl_intf, source_id);
if (!cs_desc)
return false;
return (fmt->nr_rates == 1 &&
(fmt->clock & 0xff) == cs_desc->bClockID &&
(cs_desc->bmAttributes & 0x3) !=
UAC_CLOCK_SOURCE_TYPE_EXT);
}
return false;
}
static bool uac_clock_source_is_valid(struct snd_usb_audio *chip,
int protocol,
struct audioformat *fmt,
int source_id)
{
int err;
@ -160,7 +186,7 @@ static bool uac_clock_source_is_valid(struct snd_usb_audio *chip,
struct usb_device *dev = chip->dev;
u32 bmControls;
if (protocol == UAC_VERSION_3) {
if (fmt->protocol == UAC_VERSION_3) {
struct uac3_clock_source_descriptor *cs_desc =
snd_usb_find_clock_source_v3(chip->ctrl_intf, source_id);
@ -194,10 +220,14 @@ static bool uac_clock_source_is_valid(struct snd_usb_audio *chip,
return false;
}
return data ? true : false;
if (data)
return true;
else
return uac_clock_source_is_valid_quirk(chip, fmt, source_id);
}
static int __uac_clock_find_source(struct snd_usb_audio *chip, int entity_id,
static int __uac_clock_find_source(struct snd_usb_audio *chip,
struct audioformat *fmt, int entity_id,
unsigned long *visited, bool validate)
{
struct uac_clock_source_descriptor *source;
@ -217,7 +247,7 @@ static int __uac_clock_find_source(struct snd_usb_audio *chip, int entity_id,
source = snd_usb_find_clock_source(chip->ctrl_intf, entity_id);
if (source) {
entity_id = source->bClockID;
if (validate && !uac_clock_source_is_valid(chip, UAC_VERSION_2,
if (validate && !uac_clock_source_is_valid(chip, fmt,
entity_id)) {
usb_audio_err(chip,
"clock source %d is not valid, cannot use\n",
@ -248,7 +278,8 @@ static int __uac_clock_find_source(struct snd_usb_audio *chip, int entity_id,
}
cur = ret;
ret = __uac_clock_find_source(chip, selector->baCSourceID[ret - 1],
ret = __uac_clock_find_source(chip, fmt,
selector->baCSourceID[ret - 1],
visited, validate);
if (!validate || ret > 0 || !chip->autoclock)
return ret;
@ -260,7 +291,8 @@ static int __uac_clock_find_source(struct snd_usb_audio *chip, int entity_id,
if (i == cur)
continue;
ret = __uac_clock_find_source(chip, selector->baCSourceID[i - 1],
ret = __uac_clock_find_source(chip, fmt,
selector->baCSourceID[i - 1],
visited, true);
if (ret < 0)
continue;
@ -281,13 +313,15 @@ static int __uac_clock_find_source(struct snd_usb_audio *chip, int entity_id,
/* FIXME: multipliers only act as pass-thru element for now */
multiplier = snd_usb_find_clock_multiplier(chip->ctrl_intf, entity_id);
if (multiplier)
return __uac_clock_find_source(chip, multiplier->bCSourceID,
return __uac_clock_find_source(chip, fmt,
multiplier->bCSourceID,
visited, validate);
return -EINVAL;
}
static int __uac3_clock_find_source(struct snd_usb_audio *chip, int entity_id,
static int __uac3_clock_find_source(struct snd_usb_audio *chip,
struct audioformat *fmt, int entity_id,
unsigned long *visited, bool validate)
{
struct uac3_clock_source_descriptor *source;
@ -307,7 +341,7 @@ static int __uac3_clock_find_source(struct snd_usb_audio *chip, int entity_id,
source = snd_usb_find_clock_source_v3(chip->ctrl_intf, entity_id);
if (source) {
entity_id = source->bClockID;
if (validate && !uac_clock_source_is_valid(chip, UAC_VERSION_3,
if (validate && !uac_clock_source_is_valid(chip, fmt,
entity_id)) {
usb_audio_err(chip,
"clock source %d is not valid, cannot use\n",
@ -338,7 +372,8 @@ static int __uac3_clock_find_source(struct snd_usb_audio *chip, int entity_id,
}
cur = ret;
ret = __uac3_clock_find_source(chip, selector->baCSourceID[ret - 1],
ret = __uac3_clock_find_source(chip, fmt,
selector->baCSourceID[ret - 1],
visited, validate);
if (!validate || ret > 0 || !chip->autoclock)
return ret;
@ -350,7 +385,8 @@ static int __uac3_clock_find_source(struct snd_usb_audio *chip, int entity_id,
if (i == cur)
continue;
ret = __uac3_clock_find_source(chip, selector->baCSourceID[i - 1],
ret = __uac3_clock_find_source(chip, fmt,
selector->baCSourceID[i - 1],
visited, true);
if (ret < 0)
continue;
@ -372,7 +408,8 @@ static int __uac3_clock_find_source(struct snd_usb_audio *chip, int entity_id,
multiplier = snd_usb_find_clock_multiplier_v3(chip->ctrl_intf,
entity_id);
if (multiplier)
return __uac3_clock_find_source(chip, multiplier->bCSourceID,
return __uac3_clock_find_source(chip, fmt,
multiplier->bCSourceID,
visited, validate);
return -EINVAL;
@ -389,18 +426,18 @@ static int __uac3_clock_find_source(struct snd_usb_audio *chip, int entity_id,
*
* Returns the clock source UnitID (>=0) on success, or an error.
*/
int snd_usb_clock_find_source(struct snd_usb_audio *chip, int protocol,
int entity_id, bool validate)
int snd_usb_clock_find_source(struct snd_usb_audio *chip,
struct audioformat *fmt, bool validate)
{
DECLARE_BITMAP(visited, 256);
memset(visited, 0, sizeof(visited));
switch (protocol) {
switch (fmt->protocol) {
case UAC_VERSION_2:
return __uac_clock_find_source(chip, entity_id, visited,
return __uac_clock_find_source(chip, fmt, fmt->clock, visited,
validate);
case UAC_VERSION_3:
return __uac3_clock_find_source(chip, entity_id, visited,
return __uac3_clock_find_source(chip, fmt, fmt->clock, visited,
validate);
default:
return -EINVAL;
@ -501,8 +538,7 @@ static int set_sample_rate_v2v3(struct snd_usb_audio *chip, int iface,
* automatic clock selection if the current clock is not
* valid.
*/
clock = snd_usb_clock_find_source(chip, fmt->protocol,
fmt->clock, true);
clock = snd_usb_clock_find_source(chip, fmt, true);
if (clock < 0) {
/* We did not find a valid clock, but that might be
* because the current sample rate does not match an
@ -510,8 +546,7 @@ static int set_sample_rate_v2v3(struct snd_usb_audio *chip, int iface,
* and we will do another validation after setting the
* rate.
*/
clock = snd_usb_clock_find_source(chip, fmt->protocol,
fmt->clock, false);
clock = snd_usb_clock_find_source(chip, fmt, false);
if (clock < 0)
return clock;
}
@ -577,7 +612,7 @@ static int set_sample_rate_v2v3(struct snd_usb_audio *chip, int iface,
validation:
/* validate clock after rate change */
if (!uac_clock_source_is_valid(chip, fmt->protocol, clock))
if (!uac_clock_source_is_valid(chip, fmt, clock))
return -ENXIO;
return 0;
}

4
sound/usb/clock.h
View File

@ -6,7 +6,7 @@ int snd_usb_init_sample_rate(struct snd_usb_audio *chip, int iface,
struct usb_host_interface *alts,
struct audioformat *fmt, int rate);
int snd_usb_clock_find_source(struct snd_usb_audio *chip, int protocol,
int entity_id, bool validate);
int snd_usb_clock_find_source(struct snd_usb_audio *chip,
struct audioformat *fmt, bool validate);
#endif /* __USBAUDIO_CLOCK_H */

3
sound/usb/format.c
View File

@ -336,8 +336,7 @@ static int parse_audio_format_rates_v2v3(struct snd_usb_audio *chip,
struct usb_device *dev = chip->dev;
unsigned char tmp[2], *data;
int nr_triplets, data_size, ret = 0, ret_l6;
int clock = snd_usb_clock_find_source(chip, fp->protocol,
fp->clock, false);
int clock = snd_usb_clock_find_source(chip, fp, false);
if (clock < 0) {
dev_err(&dev->dev,