[alsa-devel] [PATCH 1/2] ASoC: core: Add snd_soc_card_get_kcontrol()

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Dimitris Papastamos

29 Jul 2013 29 Jul '13

3:51 p.m.

This is useful for drivers who want to grab a pointer to snd_kcontrol outside of the kcontrol callbacks.

Signed-off-by: Dimitris Papastamos dp@opensource.wolfsonmicro.com --- include/sound/soc.h | 2 ++ sound/soc/soc-core.c | 16 ++++++++++++++++ 2 files changed, 18 insertions(+)

diff --git a/include/sound/soc.h b/include/sound/soc.h index 6eabee7..b33d1de 100644 --- a/include/sound/soc.h +++ b/include/sound/soc.h @@ -475,6 +475,8 @@ int snd_soc_set_ac97_ops(struct snd_ac97_bus_ops *ops); struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template, void *data, const char *long_name, const char *prefix); +struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card, + const char *name); int snd_soc_add_codec_controls(struct snd_soc_codec *codec, const struct snd_kcontrol_new *controls, int num_controls); int snd_soc_add_platform_controls(struct snd_soc_platform *platform, diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c index d82ee38..d68a486 100644 --- a/sound/soc/soc-core.c +++ b/sound/soc/soc-core.c @@ -2299,6 +2299,22 @@ static int snd_soc_add_controls(struct snd_card *card, struct device *dev, return 0; }

+struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card, + const char *name) +{ + struct snd_card *card = soc_card->snd_card; + struct snd_kcontrol *kctl; + + if (unlikely(!name)) + return NULL; + + list_for_each_entry(kctl, &card->controls, list) + if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) + return kctl; + return NULL; +} +EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol); + /** * snd_soc_add_codec_controls - add an array of controls to a codec. * Convenience function to add a list of controls. Many codecs were

-- 1.8.3.4

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Dimitris Papastamos

29 Jul 29 Jul

3:51 p.m.

New subject: [alsa-devel] [PATCH 2/2] ASoC: wm_adsp: Simplify kcontrol handling

Get rid off the wm_coeff struct and the wm_coeff_add_kcontrol() function. We are now using the snd_soc_card_kcontrol() function to get the kcontrol pointers. No need to call into ALSA code to register the kcontrols.

Signed-off-by: Dimitris Papastamos dp@opensource.wolfsonmicro.com --- sound/soc/codecs/wm_adsp.c | 103 ++++++++++++++------------------------------- sound/soc/codecs/wm_adsp.h | 2 +- 2 files changed, 32 insertions(+), 73 deletions(-)

diff --git a/sound/soc/codecs/wm_adsp.c b/sound/soc/codecs/wm_adsp.c index 05252ac..3168224 100644 --- a/sound/soc/codecs/wm_adsp.c +++ b/sound/soc/codecs/wm_adsp.c @@ -225,15 +225,9 @@ struct wm_coeff_ctl_ops { struct snd_ctl_elem_info *uinfo); };

-struct wm_coeff { - struct device *dev; - struct list_head ctl_list; - struct regmap *regmap; -}; - struct wm_coeff_ctl { const char *name; - struct snd_card *card; + struct snd_soc_card *card; struct wm_adsp_alg_region region; struct wm_coeff_ctl_ops ops; struct wm_adsp *adsp; @@ -378,7 +372,6 @@ static int wm_coeff_info(struct snd_kcontrol *kcontrol, static int wm_coeff_write_control(struct snd_kcontrol *kcontrol, const void *buf, size_t len) { - struct wm_coeff *wm_coeff= snd_kcontrol_chip(kcontrol); struct wm_coeff_ctl *ctl = (struct wm_coeff_ctl *)kcontrol->private_value; struct wm_adsp_alg_region *region = &ctl->region; const struct wm_adsp_region *mem; @@ -401,7 +394,7 @@ static int wm_coeff_write_control(struct snd_kcontrol *kcontrol, if (!scratch) return -ENOMEM;

- ret = regmap_raw_write(wm_coeff->regmap, reg, scratch, + ret = regmap_raw_write(adsp->regmap, reg, scratch, ctl->len); if (ret) { adsp_err(adsp, "Failed to write %zu bytes to %x\n", @@ -434,7 +427,6 @@ static int wm_coeff_put(struct snd_kcontrol *kcontrol, static int wm_coeff_read_control(struct snd_kcontrol *kcontrol, void *buf, size_t len) { - struct wm_coeff *wm_coeff= snd_kcontrol_chip(kcontrol); struct wm_coeff_ctl *ctl = (struct wm_coeff_ctl *)kcontrol->private_value; struct wm_adsp_alg_region *region = &ctl->region; const struct wm_adsp_region *mem; @@ -457,7 +449,7 @@ static int wm_coeff_read_control(struct snd_kcontrol *kcontrol, if (!scratch) return -ENOMEM;

- ret = regmap_raw_read(wm_coeff->regmap, reg, scratch, ctl->len); + ret = regmap_raw_read(adsp->regmap, reg, scratch, ctl->len); if (ret) { adsp_err(adsp, "Failed to read %zu bytes from %x\n", ctl->len, reg); @@ -481,37 +473,18 @@ static int wm_coeff_get(struct snd_kcontrol *kcontrol, return 0; }

-static int wm_coeff_add_kcontrol(struct wm_coeff *wm_coeff, - struct wm_coeff_ctl *ctl, - const struct snd_kcontrol_new *kctl) -{ - int ret; - struct snd_kcontrol *kcontrol; - - kcontrol = snd_ctl_new1(kctl, wm_coeff); - ret = snd_ctl_add(ctl->card, kcontrol); - if (ret < 0) { - dev_err(wm_coeff->dev, "Failed to add %s: %d\n", - kctl->name, ret); - return ret; - } - ctl->kcontrol = kcontrol; - return 0; -} - struct wmfw_ctl_work { - struct wm_coeff *wm_coeff; + struct wm_adsp *adsp; struct wm_coeff_ctl *ctl; struct work_struct work; };

-static int wmfw_add_ctl(struct wm_coeff *wm_coeff, - struct wm_coeff_ctl *ctl) +static int wmfw_add_ctl(struct wm_adsp *adsp, struct wm_coeff_ctl *ctl) { struct snd_kcontrol_new *kcontrol; int ret;

- if (!wm_coeff || !ctl || !ctl->name || !ctl->card) + if (!ctl || !ctl->name || !ctl->card) return -EINVAL;

kcontrol = kzalloc(sizeof(*kcontrol), GFP_KERNEL); @@ -525,14 +498,17 @@ static int wmfw_add_ctl(struct wm_coeff *wm_coeff, kcontrol->put = wm_coeff_put; kcontrol->private_value = (unsigned long)ctl;

- ret = wm_coeff_add_kcontrol(wm_coeff, - ctl, kcontrol); + ret = snd_soc_add_card_controls(ctl->card, + kcontrol, 1); if (ret < 0) goto err_kcontrol;

kfree(kcontrol);

- list_add(&ctl->list, &wm_coeff->ctl_list); + ctl->kcontrol = snd_soc_card_get_kcontrol(ctl->card, + ctl->name); + + list_add(&ctl->list, &adsp->ctl_list); return 0;

err_kcontrol: @@ -753,13 +729,12 @@ out: return ret; }

-static int wm_coeff_init_control_caches(struct wm_coeff *wm_coeff) +static int wm_coeff_init_control_caches(struct wm_adsp *adsp) { struct wm_coeff_ctl *ctl; int ret;

- list_for_each_entry(ctl, &wm_coeff->ctl_list, - list) { + list_for_each_entry(ctl, &adsp->ctl_list, list) { if (!ctl->enabled || ctl->set) continue; ret = wm_coeff_read_control(ctl->kcontrol, @@ -772,13 +747,12 @@ static int wm_coeff_init_control_caches(struct wm_coeff *wm_coeff) return 0; }

-static int wm_coeff_sync_controls(struct wm_coeff *wm_coeff) +static int wm_coeff_sync_controls(struct wm_adsp *adsp) { struct wm_coeff_ctl *ctl; int ret;

- list_for_each_entry(ctl, &wm_coeff->ctl_list, - list) { + list_for_each_entry(ctl, &adsp->ctl_list, list) { if (!ctl->enabled) continue; if (ctl->set) { @@ -799,7 +773,7 @@ static void wm_adsp_ctl_work(struct work_struct *work) struct wmfw_ctl_work, work);

- wmfw_add_ctl(ctl_work->wm_coeff, ctl_work->ctl); + wmfw_add_ctl(ctl_work->adsp, ctl_work->ctl); kfree(ctl_work); }

@@ -842,7 +816,7 @@ static int wm_adsp_create_control(struct snd_soc_codec *codec, snprintf(name, PAGE_SIZE, "DSP%d %s %x", dsp->num, region_name, region->alg);

- list_for_each_entry(ctl, &dsp->wm_coeff->ctl_list, + list_for_each_entry(ctl, &dsp->ctl_list, list) { if (!strcmp(ctl->name, name)) { if (!ctl->enabled) @@ -866,7 +840,7 @@ static int wm_adsp_create_control(struct snd_soc_codec *codec, ctl->set = 0; ctl->ops.xget = wm_coeff_get; ctl->ops.xput = wm_coeff_put; - ctl->card = codec->card->snd_card; + ctl->card = codec->card; ctl->adsp = dsp;

ctl->len = region->len; @@ -882,7 +856,7 @@ static int wm_adsp_create_control(struct snd_soc_codec *codec, goto err_ctl_cache; }

- ctl_work->wm_coeff = dsp->wm_coeff; + ctl_work->adsp = dsp; ctl_work->ctl = ctl; INIT_WORK(&ctl_work->work, wm_adsp_ctl_work); schedule_work(&ctl_work->work); @@ -1434,12 +1408,12 @@ int wm_adsp1_event(struct snd_soc_dapm_widget *w, goto err;

/* Initialize caches for enabled and unset controls */ - ret = wm_coeff_init_control_caches(dsp->wm_coeff); + ret = wm_coeff_init_control_caches(dsp); if (ret != 0) goto err;

/* Sync set controls */ - ret = wm_coeff_sync_controls(dsp->wm_coeff); + ret = wm_coeff_sync_controls(dsp); if (ret != 0) goto err;

@@ -1460,10 +1434,8 @@ int wm_adsp1_event(struct snd_soc_dapm_widget *w, regmap_update_bits(dsp->regmap, dsp->base + ADSP1_CONTROL_30, ADSP1_SYS_ENA, 0);

- list_for_each_entry(ctl, &dsp->wm_coeff->ctl_list, - list) { + list_for_each_entry(ctl, &dsp->ctl_list, list) ctl->enabled = 0; - } break;

default: @@ -1591,12 +1563,12 @@ int wm_adsp2_event(struct snd_soc_dapm_widget *w, goto err;

/* Initialize caches for enabled and unset controls */ - ret = wm_coeff_init_control_caches(dsp->wm_coeff); + ret = wm_coeff_init_control_caches(dsp); if (ret != 0) goto err;

/* Sync set controls */ - ret = wm_coeff_sync_controls(dsp->wm_coeff); + ret = wm_coeff_sync_controls(dsp); if (ret != 0) goto err;

@@ -1637,10 +1609,8 @@ int wm_adsp2_event(struct snd_soc_dapm_widget *w, ret); }

- list_for_each_entry(ctl, &dsp->wm_coeff->ctl_list, - list) { + list_for_each_entry(ctl, &dsp->ctl_list, list) ctl->enabled = 0; - }

while (!list_empty(&dsp->alg_regions)) { alg_region = list_first_entry(&dsp->alg_regions, @@ -1679,49 +1649,38 @@ int wm_adsp2_init(struct wm_adsp *adsp, bool dvfs) }

INIT_LIST_HEAD(&adsp->alg_regions); - - adsp->wm_coeff = kzalloc(sizeof(*adsp->wm_coeff), - GFP_KERNEL); - if (!adsp->wm_coeff) - return -ENOMEM; - adsp->wm_coeff->regmap = adsp->regmap; - adsp->wm_coeff->dev = adsp->dev; - INIT_LIST_HEAD(&adsp->wm_coeff->ctl_list); + INIT_LIST_HEAD(&adsp->ctl_list);

if (dvfs) { adsp->dvfs = devm_regulator_get(adsp->dev, "DCVDD"); if (IS_ERR(adsp->dvfs)) { ret = PTR_ERR(adsp->dvfs); dev_err(adsp->dev, "Failed to get DCVDD: %d\n", ret); - goto out_coeff; + return ret; }

ret = regulator_enable(adsp->dvfs); if (ret != 0) { dev_err(adsp->dev, "Failed to enable DCVDD: %d\n", ret); - goto out_coeff; + return ret; }

ret = regulator_set_voltage(adsp->dvfs, 1200000, 1800000); if (ret != 0) { dev_err(adsp->dev, "Failed to initialise DVFS: %d\n", ret); - goto out_coeff; + return ret; }

ret = regulator_disable(adsp->dvfs); if (ret != 0) { dev_err(adsp->dev, "Failed to disable DCVDD: %d\n", ret); - goto out_coeff; + return ret; } }

return 0; - -out_coeff: - kfree(adsp->wm_coeff); - return ret; } EXPORT_SYMBOL_GPL(wm_adsp2_init); diff --git a/sound/soc/codecs/wm_adsp.h b/sound/soc/codecs/wm_adsp.h index 9f922c8..64087fb 100644 --- a/sound/soc/codecs/wm_adsp.h +++ b/sound/soc/codecs/wm_adsp.h @@ -57,7 +57,7 @@ struct wm_adsp {

struct regulator *dvfs;

- struct wm_coeff *wm_coeff; + struct list_head ctl_list; };

#define WM_ADSP1(wname, num) \

-- 1.8.3.4