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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound 

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda/realtek - Fix lost speaker volume controls
  ALSA: hda/realtek - Create "Bass Speaker" for two speaker pins
  ALSA: hda/realtek - Don't create extra controls with channel suffix
  ALSA: hda - Fix remaining VREF mute-LED NID check in post-3.1 changes
  ALSA: hda - Fix GPIO LED setup for IDT 92HD75 codecs
  ASoC: Provide a more complete DMA driver stub
  ASoC: Remove references to corgi and spitz from machine driver document
  ASoC: Make SND_SOC_MX27VIS_AIC32X4 depend on I2C
  ASoC: Fix dependency for SND_SOC_RAUMFELD and SND_PXA2XX_SOC_HX4700
  ASoC: uda1380: Return proper error in uda1380_modinit failure path
  ASoC: kirkwood: Make SND_KIRKWOOD_SOC_OPENRD and SND_KIRKWOOD_SOC_T5325 depend on I2C
  ASoC: Mark WM8994 ADC muxes as virtual
  ALSA: hda/realtek - Fix Oops in alc_mux_select()
  ALSA: sis7019 - give slow codecs more time to reset
This commit is contained in:
Linus Torvalds 2011-12-09 08:07:42 -08:00
Родитель 975e32c287 0a34b42b62
Коммит 3ab345fc4b
10 изменённых файлов: 173 добавлений и 66 удалений
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6
Documentation/sound/alsa/soc/machine.txt
Просмотреть файл

@ -50,8 +50,7 @@ Machine DAI Configuration
The machine DAI configuration glues all the codec and CPU DAIs together. It can
also be used to set up the DAI system clock and for any machine related DAI
initialisation e.g. the machine audio map can be connected to the codec audio
map, unconnected codec pins can be set as such. Please see corgi.c, spitz.c
for examples.
map, unconnected codec pins can be set as such.
struct snd_soc_dai_link is used to set up each DAI in your machine. e.g.
@ -83,8 +82,7 @@ Machine Power Map
The machine driver can optionally extend the codec power map and to become an
audio power map of the audio subsystem. This allows for automatic power up/down
of speaker/HP amplifiers, etc. Codec pins can be connected to the machines jack
sockets in the machine init function. See soc/pxa/spitz.c and dapm.txt for
details.
sockets in the machine init function.
Machine Controls

65
sound/pci/hda/patch_realtek.c
Просмотреть файл

@ -297,6 +297,8 @@ static int alc_mux_select(struct hda_codec *codec, unsigned int adc_idx,
imux = &spec->input_mux[mux_idx];
if (!imux->num_items && mux_idx > 0)
imux = &spec->input_mux[0];
if (!imux->num_items)
return 0;
if (idx >= imux->num_items)
idx = imux->num_items - 1;
@ -2629,6 +2631,8 @@ static const char *alc_get_line_out_pfx(struct alc_spec *spec, int ch,
case AUTO_PIN_SPEAKER_OUT:
if (cfg->line_outs == 1)
return "Speaker";
if (cfg->line_outs == 2)
return ch ? "Bass Speaker" : "Speaker";
break;
case AUTO_PIN_HP_OUT:
/* for multi-io case, only the primary out */
@ -2902,7 +2906,7 @@ static hda_nid_t alc_auto_look_for_dac(struct hda_codec *codec, hda_nid_t pin)
if (!nid)
continue;
if (found_in_nid_list(nid, spec->multiout.dac_nids,
spec->multiout.num_dacs))
ARRAY_SIZE(spec->private_dac_nids)))
continue;
if (found_in_nid_list(nid, spec->multiout.hp_out_nid,
ARRAY_SIZE(spec->multiout.hp_out_nid)))
@ -2923,6 +2927,7 @@ static hda_nid_t get_dac_if_single(struct hda_codec *codec, hda_nid_t pin)
return 0;
}
/* return 0 if no possible DAC is found, 1 if one or more found */
static int alc_auto_fill_extra_dacs(struct hda_codec *codec, int num_outs,
const hda_nid_t *pins, hda_nid_t *dacs)
{
@ -2940,7 +2945,7 @@ static int alc_auto_fill_extra_dacs(struct hda_codec *codec, int num_outs,
if (!dacs[i])
dacs[i] = alc_auto_look_for_dac(codec, pins[i]);
}
return 0;
return 1;
}
static int alc_auto_fill_multi_ios(struct hda_codec *codec,
@ -2950,7 +2955,7 @@ static int alc_auto_fill_multi_ios(struct hda_codec *codec,
static int alc_auto_fill_dac_nids(struct hda_codec *codec)
{
struct alc_spec *spec = codec->spec;
const struct auto_pin_cfg *cfg = &spec->autocfg;
struct auto_pin_cfg *cfg = &spec->autocfg;
bool redone = false;
int i;
@ -2961,6 +2966,7 @@ static int alc_auto_fill_dac_nids(struct hda_codec *codec)
spec->multiout.extra_out_nid[0] = 0;
memset(spec->private_dac_nids, 0, sizeof(spec->private_dac_nids));
spec->multiout.dac_nids = spec->private_dac_nids;
spec->multi_ios = 0;
/* fill hard-wired DACs first */
if (!redone) {
@ -2994,10 +3000,12 @@ static int alc_auto_fill_dac_nids(struct hda_codec *codec)
for (i = 0; i < cfg->line_outs; i++) {
if (spec->private_dac_nids[i])
spec->multiout.num_dacs++;
else
else {
memmove(spec->private_dac_nids + i,
spec->private_dac_nids + i + 1,
sizeof(hda_nid_t) * (cfg->line_outs - i - 1));
spec->private_dac_nids[cfg->line_outs - 1] = 0;
}
}
if (cfg->line_outs == 1 && cfg->line_out_type != AUTO_PIN_SPEAKER_OUT) {
@ -3019,9 +3027,28 @@ static int alc_auto_fill_dac_nids(struct hda_codec *codec)
if (cfg->line_out_type != AUTO_PIN_HP_OUT)
alc_auto_fill_extra_dacs(codec, cfg->hp_outs, cfg->hp_pins,
spec->multiout.hp_out_nid);
if (cfg->line_out_type != AUTO_PIN_SPEAKER_OUT)
alc_auto_fill_extra_dacs(codec, cfg->speaker_outs, cfg->speaker_pins,
spec->multiout.extra_out_nid);
if (cfg->line_out_type != AUTO_PIN_SPEAKER_OUT) {
int err = alc_auto_fill_extra_dacs(codec, cfg->speaker_outs,
cfg->speaker_pins,
spec->multiout.extra_out_nid);
/* if no speaker volume is assigned, try again as the primary
* output
*/
if (!err && cfg->speaker_outs > 0 &&
cfg->line_out_type == AUTO_PIN_HP_OUT) {
cfg->hp_outs = cfg->line_outs;
memcpy(cfg->hp_pins, cfg->line_out_pins,
sizeof(cfg->hp_pins));
cfg->line_outs = cfg->speaker_outs;
memcpy(cfg->line_out_pins, cfg->speaker_pins,
sizeof(cfg->speaker_pins));
cfg->speaker_outs = 0;
memset(cfg->speaker_pins, 0, sizeof(cfg->speaker_pins));
cfg->line_out_type = AUTO_PIN_SPEAKER_OUT;
redone = false;
goto again;
}
}
return 0;
}
@ -3171,7 +3198,8 @@ static int alc_auto_create_multi_out_ctls(struct hda_codec *codec,
}
static int alc_auto_create_extra_out(struct hda_codec *codec, hda_nid_t pin,
hda_nid_t dac, const char *pfx)
hda_nid_t dac, const char *pfx,
int cidx)
{
struct alc_spec *spec = codec->spec;
hda_nid_t sw, vol;
@ -3187,15 +3215,15 @@ static int alc_auto_create_extra_out(struct hda_codec *codec, hda_nid_t pin,
if (is_ctl_used(spec->sw_ctls, val))
return 0; /* already created */
mark_ctl_usage(spec->sw_ctls, val);
return add_pb_sw_ctrl(spec, ALC_CTL_WIDGET_MUTE, pfx, val);
return __add_pb_sw_ctrl(spec, ALC_CTL_WIDGET_MUTE, pfx, cidx, val);
}
sw = alc_look_for_out_mute_nid(codec, pin, dac);
vol = alc_look_for_out_vol_nid(codec, pin, dac);
err = alc_auto_add_stereo_vol(codec, pfx, 0, vol);
err = alc_auto_add_stereo_vol(codec, pfx, cidx, vol);
if (err < 0)
return err;
err = alc_auto_add_stereo_sw(codec, pfx, 0, sw);
err = alc_auto_add_stereo_sw(codec, pfx, cidx, sw);
if (err < 0)
return err;
return 0;
@ -3236,16 +3264,21 @@ static int alc_auto_create_extra_outs(struct hda_codec *codec, int num_pins,
hda_nid_t dac = *dacs;
if (!dac)
dac = spec->multiout.dac_nids[0];
return alc_auto_create_extra_out(codec, *pins, dac, pfx);
return alc_auto_create_extra_out(codec, *pins, dac, pfx, 0);
}
if (dacs[num_pins - 1]) {
/* OK, we have a multi-output system with individual volumes */
for (i = 0; i < num_pins; i++) {
snprintf(name, sizeof(name), "%s %s",
pfx, channel_name[i]);
err = alc_auto_create_extra_out(codec, pins[i], dacs[i],
name);
if (num_pins >= 3) {
snprintf(name, sizeof(name), "%s %s",
pfx, channel_name[i]);
err = alc_auto_create_extra_out(codec, pins[i], dacs[i],
name, 0);
} else {
err = alc_auto_create_extra_out(codec, pins[i], dacs[i],
pfx, i);
}
if (err < 0)
return err;
}

47
sound/pci/hda/patch_sigmatel.c
Просмотреть файл

@ -215,6 +215,7 @@ struct sigmatel_spec {
unsigned int gpio_mute;
unsigned int gpio_led;
unsigned int gpio_led_polarity;
unsigned int vref_mute_led_nid; /* pin NID for mute-LED vref control */
unsigned int vref_led;
/* stream */
@ -4318,12 +4319,10 @@ static void stac_store_hints(struct hda_codec *codec)
spec->eapd_switch = val;
get_int_hint(codec, "gpio_led_polarity", &spec->gpio_led_polarity);
if (get_int_hint(codec, "gpio_led", &spec->gpio_led)) {
if (spec->gpio_led <= 8) {
spec->gpio_mask |= spec->gpio_led;
spec->gpio_dir |= spec->gpio_led;
if (spec->gpio_led_polarity)
spec->gpio_data |= spec->gpio_led;
}
spec->gpio_mask |= spec->gpio_led;
spec->gpio_dir |= spec->gpio_led;
if (spec->gpio_led_polarity)
spec->gpio_data |= spec->gpio_led;
}
}
@ -4443,7 +4442,7 @@ static int stac92xx_init(struct hda_codec *codec)
/* power on when no jack detection is available */
/* or when the VREF is used for controlling LED */
if (!spec->hp_detect ||
(spec->gpio_led > 8 && spec->gpio_led == nid)) {
spec->vref_mute_led_nid == nid) {
stac_toggle_power_map(codec, nid, 1);
continue;
}
@ -4915,8 +4914,14 @@ static int find_mute_led_gpio(struct hda_codec *codec, int default_polarity)
if (sscanf(dev->name, "HP_Mute_LED_%d_%x",
&spec->gpio_led_polarity,
&spec->gpio_led) == 2) {
if (spec->gpio_led < 4)
unsigned int max_gpio;
max_gpio = snd_hda_param_read(codec, codec->afg,
AC_PAR_GPIO_CAP);
max_gpio &= AC_GPIO_IO_COUNT;
if (spec->gpio_led < max_gpio)
spec->gpio_led = 1 << spec->gpio_led;
else
spec->vref_mute_led_nid = spec->gpio_led;
return 1;
}
if (sscanf(dev->name, "HP_Mute_LED_%d",
@ -5045,15 +5050,12 @@ static int stac92xx_pre_resume(struct hda_codec *codec)
struct sigmatel_spec *spec = codec->spec;
/* sync mute LED */
if (spec->gpio_led) {
if (spec->gpio_led <= 8) {
stac_gpio_set(codec, spec->gpio_mask,
spec->gpio_dir, spec->gpio_data);
} else {
stac_vrefout_set(codec,
spec->gpio_led, spec->vref_led);
}
}
if (spec->vref_mute_led_nid)
stac_vrefout_set(codec, spec->vref_mute_led_nid,
spec->vref_led);
else if (spec->gpio_led)
stac_gpio_set(codec, spec->gpio_mask,
spec->gpio_dir, spec->gpio_data);
return 0;
}
@ -5064,7 +5066,7 @@ static void stac92xx_set_power_state(struct hda_codec *codec, hda_nid_t fg,
struct sigmatel_spec *spec = codec->spec;
if (power_state == AC_PWRST_D3) {
if (spec->gpio_led > 8) {
if (spec->vref_mute_led_nid) {
/* with vref-out pin used for mute led control
* codec AFG is prevented from D3 state
*/
@ -5117,7 +5119,7 @@ static int stac92xx_update_led_status(struct hda_codec *codec)
}
}
/*polarity defines *not* muted state level*/
if (spec->gpio_led <= 8) {
if (!spec->vref_mute_led_nid) {
if (muted)
spec->gpio_data &= ~spec->gpio_led; /* orange */
else
@ -5135,7 +5137,8 @@ static int stac92xx_update_led_status(struct hda_codec *codec)
muted_lvl = spec->gpio_led_polarity ?
AC_PINCTL_VREF_GRD : AC_PINCTL_VREF_HIZ;
spec->vref_led = muted ? muted_lvl : notmtd_lvl;
stac_vrefout_set(codec, spec->gpio_led, spec->vref_led);
stac_vrefout_set(codec, spec->vref_mute_led_nid,
spec->vref_led);
}
return 0;
}
@ -5649,7 +5652,7 @@ again:
#ifdef CONFIG_SND_HDA_POWER_SAVE
if (spec->gpio_led) {
if (spec->gpio_led <= 8) {
if (!spec->vref_mute_led_nid) {
spec->gpio_mask |= spec->gpio_led;
spec->gpio_dir |= spec->gpio_led;
spec->gpio_data |= spec->gpio_led;
@ -5962,7 +5965,7 @@ again:
#ifdef CONFIG_SND_HDA_POWER_SAVE
if (spec->gpio_led) {
if (spec->gpio_led <= 8) {
if (!spec->vref_mute_led_nid) {
spec->gpio_mask |= spec->gpio_led;
spec->gpio_dir |= spec->gpio_led;
spec->gpio_data |= spec->gpio_led;

66
sound/pci/sis7019.c
Просмотреть файл

@ -41,6 +41,7 @@ MODULE_SUPPORTED_DEVICE("{{SiS,SiS7019 Audio Accelerator}}");
static int index = SNDRV_DEFAULT_IDX1; /* Index 0-MAX */
static char *id = SNDRV_DEFAULT_STR1; /* ID for this card */
static int enable = 1;
static int codecs = 1;
module_param(index, int, 0444);
MODULE_PARM_DESC(index, "Index value for SiS7019 Audio Accelerator.");
@ -48,6 +49,8 @@ module_param(id, charp, 0444);
MODULE_PARM_DESC(id, "ID string for SiS7019 Audio Accelerator.");
module_param(enable, bool, 0444);
MODULE_PARM_DESC(enable, "Enable SiS7019 Audio Accelerator.");
module_param(codecs, int, 0444);
MODULE_PARM_DESC(codecs, "Set bit to indicate that codec number is expected to be present (default 1)");
static DEFINE_PCI_DEVICE_TABLE(snd_sis7019_ids) = {
{ PCI_DEVICE(PCI_VENDOR_ID_SI, 0x7019) },
@ -140,6 +143,9 @@ struct sis7019 {
dma_addr_t silence_dma_addr;
};
/* These values are also used by the module param 'codecs' to indicate
* which codecs should be present.
*/
#define SIS_PRIMARY_CODEC_PRESENT 0x0001
#define SIS_SECONDARY_CODEC_PRESENT 0x0002
#define SIS_TERTIARY_CODEC_PRESENT 0x0004
@ -1078,6 +1084,7 @@ static int sis_chip_init(struct sis7019 *sis)
{
unsigned long io = sis->ioport;
void __iomem *ioaddr = sis->ioaddr;
unsigned long timeout;
u16 status;
int count;
int i;
@ -1104,22 +1111,46 @@ static int sis_chip_init(struct sis7019 *sis)
while ((inw(io + SIS_AC97_STATUS) & SIS_AC97_STATUS_BUSY) && --count)
udelay(1);
/* Now that we've finished the reset, find out what's attached.
*/
status = inl(io + SIS_AC97_STATUS);
if (status & SIS_AC97_STATUS_CODEC_READY)
sis->codecs_present |= SIS_PRIMARY_CODEC_PRESENT;
if (status & SIS_AC97_STATUS_CODEC2_READY)
sis->codecs_present |= SIS_SECONDARY_CODEC_PRESENT;
if (status & SIS_AC97_STATUS_CODEC3_READY)
sis->codecs_present |= SIS_TERTIARY_CODEC_PRESENT;
/* All done, let go of the semaphore, and check for errors
/* Command complete, we can let go of the semaphore now.
*/
outl(SIS_AC97_SEMA_RELEASE, io + SIS_AC97_SEMA);
if (!sis->codecs_present || !count)
if (!count)
return -EIO;
/* Now that we've finished the reset, find out what's attached.
* There are some codec/board combinations that take an extremely
* long time to come up. 350+ ms has been observed in the field,
* so we'll give them up to 500ms.
*/
sis->codecs_present = 0;
timeout = msecs_to_jiffies(500) + jiffies;
while (time_before_eq(jiffies, timeout)) {
status = inl(io + SIS_AC97_STATUS);
if (status & SIS_AC97_STATUS_CODEC_READY)
sis->codecs_present |= SIS_PRIMARY_CODEC_PRESENT;
if (status & SIS_AC97_STATUS_CODEC2_READY)
sis->codecs_present |= SIS_SECONDARY_CODEC_PRESENT;
if (status & SIS_AC97_STATUS_CODEC3_READY)
sis->codecs_present |= SIS_TERTIARY_CODEC_PRESENT;
if (sis->codecs_present == codecs)
break;
msleep(1);
}
/* All done, check for errors.
*/
if (!sis->codecs_present) {
printk(KERN_ERR "sis7019: could not find any codecs\n");
return -EIO;
}
if (sis->codecs_present != codecs) {
printk(KERN_WARNING "sis7019: missing codecs, found %0x, expected %0x\n",
sis->codecs_present, codecs);
}
/* Let the hardware know that the audio driver is alive,
* and enable PCM slots on the AC-link for L/R playback (3 & 4) and
* record channels. We're going to want to use Variable Rate Audio
@ -1390,6 +1421,17 @@ static int __devinit snd_sis7019_probe(struct pci_dev *pci,
if (!enable)
goto error_out;
/* The user can specify which codecs should be present so that we
* can wait for them to show up if they are slow to recover from
* the AC97 cold reset. We default to a single codec, the primary.
*
* We assume that SIS_PRIMARY_*_PRESENT matches bits 0-2.
*/
codecs &= SIS_PRIMARY_CODEC_PRESENT | SIS_SECONDARY_CODEC_PRESENT |
SIS_TERTIARY_CODEC_PRESENT;
if (!codecs)
codecs = SIS_PRIMARY_CODEC_PRESENT;
rc = snd_card_create(index, id, THIS_MODULE, sizeof(*sis), &card);
if (rc < 0)
goto error_out;

4
sound/soc/codecs/uda1380.c
Просмотреть файл

@ -863,13 +863,13 @@ static struct i2c_driver uda1380_i2c_driver = {
static int __init uda1380_modinit(void)
{
int ret;
int ret = 0;
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
ret = i2c_add_driver(&uda1380_i2c_driver);
if (ret != 0)
pr_err("Failed to register UDA1380 I2C driver: %d\n", ret);
#endif
return 0;
return ret;
}
module_init(uda1380_modinit);

12
sound/soc/codecs/wm8994.c
Просмотреть файл

@ -1325,15 +1325,15 @@ SND_SOC_DAPM_DAC("DAC1R", NULL, WM8994_POWER_MANAGEMENT_5, 0, 0),
};
static const struct snd_soc_dapm_widget wm8994_adc_revd_widgets[] = {
SND_SOC_DAPM_MUX_E("ADCL Mux", WM8994_POWER_MANAGEMENT_4, 1, 0, &adcl_mux,
adc_mux_ev, SND_SOC_DAPM_PRE_PMU),
SND_SOC_DAPM_MUX_E("ADCR Mux", WM8994_POWER_MANAGEMENT_4, 0, 0, &adcr_mux,
adc_mux_ev, SND_SOC_DAPM_PRE_PMU),
SND_SOC_DAPM_VIRT_MUX_E("ADCL Mux", WM8994_POWER_MANAGEMENT_4, 1, 0, &adcl_mux,
adc_mux_ev, SND_SOC_DAPM_PRE_PMU),
SND_SOC_DAPM_VIRT_MUX_E("ADCR Mux", WM8994_POWER_MANAGEMENT_4, 0, 0, &adcr_mux,
adc_mux_ev, SND_SOC_DAPM_PRE_PMU),
};
static const struct snd_soc_dapm_widget wm8994_adc_widgets[] = {
SND_SOC_DAPM_MUX("ADCL Mux", WM8994_POWER_MANAGEMENT_4, 1, 0, &adcl_mux),
SND_SOC_DAPM_MUX("ADCR Mux", WM8994_POWER_MANAGEMENT_4, 0, 0, &adcr_mux),
SND_SOC_DAPM_VIRT_MUX("ADCL Mux", WM8994_POWER_MANAGEMENT_4, 1, 0, &adcl_mux),
SND_SOC_DAPM_VIRT_MUX("ADCR Mux", WM8994_POWER_MANAGEMENT_4, 0, 0, &adcr_mux),
};
static const struct snd_soc_dapm_widget wm8994_dapm_widgets[] = {

2
sound/soc/imx/Kconfig
Просмотреть файл

@ -28,7 +28,7 @@ config SND_MXC_SOC_WM1133_EV1
config SND_SOC_MX27VIS_AIC32X4
tristate "SoC audio support for Visstrim M10 boards"
depends on MACH_IMX27_VISSTRIM_M10
depends on MACH_IMX27_VISSTRIM_M10 && I2C
select SND_SOC_TLV320AIC32X4
select SND_MXC_SOC_MX2
help

3
sound/soc/kirkwood/Kconfig
Просмотреть файл

@ -12,6 +12,7 @@ config SND_KIRKWOOD_SOC_I2S
config SND_KIRKWOOD_SOC_OPENRD
tristate "SoC Audio support for Kirkwood Openrd Client"
depends on SND_KIRKWOOD_SOC && (MACH_OPENRD_CLIENT || MACH_OPENRD_ULTIMATE)
depends on I2C
select SND_KIRKWOOD_SOC_I2S
select SND_SOC_CS42L51
help
@ -20,7 +21,7 @@ config SND_KIRKWOOD_SOC_OPENRD
config SND_KIRKWOOD_SOC_T5325
tristate "SoC Audio support for HP t5325"
depends on SND_KIRKWOOD_SOC && MACH_T5325
depends on SND_KIRKWOOD_SOC && MACH_T5325 && I2C
select SND_KIRKWOOD_SOC_I2S
select SND_SOC_ALC5623
help

3
sound/soc/pxa/Kconfig
Просмотреть файл

@ -151,6 +151,7 @@ config SND_SOC_ZYLONITE
config SND_SOC_RAUMFELD
tristate "SoC Audio support Raumfeld audio adapter"
depends on SND_PXA2XX_SOC && (MACH_RAUMFELD_SPEAKER || MACH_RAUMFELD_CONNECTOR)
depends on I2C && SPI_MASTER
select SND_PXA_SOC_SSP
select SND_SOC_CS4270
select SND_SOC_AK4104
@ -159,7 +160,7 @@ config SND_SOC_RAUMFELD
config SND_PXA2XX_SOC_HX4700
tristate "SoC Audio support for HP iPAQ hx4700"
depends on SND_PXA2XX_SOC && MACH_H4700
depends on SND_PXA2XX_SOC && MACH_H4700 && I2C
select SND_PXA2XX_SOC_I2S
select SND_SOC_AK4641
help

31
sound/soc/soc-utils.c
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@ -58,7 +58,36 @@ int snd_soc_params_to_bclk(struct snd_pcm_hw_params *params)
}
EXPORT_SYMBOL_GPL(snd_soc_params_to_bclk);
static struct snd_soc_platform_driver dummy_platform;
static const struct snd_pcm_hardware dummy_dma_hardware = {
.formats = 0xffffffff,
.channels_min = 1,
.channels_max = UINT_MAX,
/* Random values to keep userspace happy when checking constraints */
.info = SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER,
.buffer_bytes_max = 128*1024,
.period_bytes_min = PAGE_SIZE,
.period_bytes_max = PAGE_SIZE*2,
.periods_min = 2,
.periods_max = 128,
};
static int dummy_dma_open(struct snd_pcm_substream *substream)
{
snd_soc_set_runtime_hwparams(substream, &dummy_dma_hardware);
return 0;
}
static struct snd_pcm_ops dummy_dma_ops = {
.open = dummy_dma_open,
.ioctl = snd_pcm_lib_ioctl,
};
static struct snd_soc_platform_driver dummy_platform = {
.ops = &dummy_dma_ops,
};
static __devinit int snd_soc_dummy_probe(struct platform_device *pdev)
{