[alsa-devel] [PATCH v6 1/3] ASoC: Add initial support for multiple CPU DAIs

ASoC core supports multiple codec DAIs but supports only a CPU DAI. To support multiple cpu DAIs, add cpu_dai and num_cpu_dai in snd_soc_dai_link and snd_soc_pcm_runtime structures similar to support for codec_dai. This is intended as a preparatory patch to eventually support the unification of the Codec and CPU DAI.

Inline with multiple codec DAI approach, add support to allocate, init, bind and probe multiple cpu_dai on init if driver specifies that. Also add support to loop over multiple cpu_dai during suspend and resume.

This is intended as a preparatory patch to eventually unify the CPU and Codec DAI into DAI components.

Reviewed-by: Charles Keepax ckeepax@opensource.cirrus.com Signed-off-by: Vinod Koul vkoul@kernel.org Signed-off-by: Shreyas NC shreyas.nc@intel.com --- include/sound/soc.h | 6 ++ sound/soc/soc-core.c | 290 ++++++++++++++++++++++++++++++++++++--------------- 2 files changed, 211 insertions(+), 85 deletions(-)

diff --git a/include/sound/soc.h b/include/sound/soc.h index 1378dcd..2f46009 100644 --- a/include/sound/soc.h +++ b/include/sound/soc.h @@ -903,6 +903,9 @@ struct snd_soc_dai_link { struct snd_soc_dai_link_component *codecs; unsigned int num_codecs;

+ struct snd_soc_dai_link_component *cpu_dai; + unsigned int num_cpu_dai; + /* * You MAY specify the link's platform/PCM/DMA driver, either by * device name, or by DT/OF node, but not both. Some forms of link @@ -1125,6 +1128,9 @@ struct snd_soc_pcm_runtime { struct snd_soc_dai **codec_dais; unsigned int num_codecs;

+ struct snd_soc_dai **cpu_dais; + unsigned int num_cpu_dai; + struct delayed_work delayed_work; #ifdef CONFIG_DEBUG_FS struct dentry *debugfs_dpcm_root; diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c index 4663de3..b42a0d5 100644 --- a/sound/soc/soc-core.c +++ b/sound/soc/soc-core.c @@ -381,12 +381,21 @@ static struct snd_soc_pcm_runtime *soc_new_pcm_runtime( return NULL; }

+ rtd->cpu_dais = kzalloc(sizeof(struct snd_soc_dai *) * + dai_link->num_cpu_dai, GFP_KERNEL); + if (!rtd->cpu_dais) { + kfree(rtd->codec_dais); + kfree(rtd); + return NULL; + } + return rtd; }

static void soc_free_pcm_runtime(struct snd_soc_pcm_runtime *rtd) { kfree(rtd->codec_dais); + kfree(rtd->cpu_dais); snd_soc_rtdcom_del_all(rtd); kfree(rtd); } @@ -482,13 +491,17 @@ int snd_soc_suspend(struct device *dev) card->suspend_pre(card);

list_for_each_entry(rtd, &card->rtd_list, list) { - struct snd_soc_dai *cpu_dai = rtd->cpu_dai; + struct snd_soc_dai *cpu_dai;

if (rtd->dai_link->ignore_suspend) continue;

- if (cpu_dai->driver->suspend && !cpu_dai->driver->bus_control) - cpu_dai->driver->suspend(cpu_dai); + for (i = 0; i < rtd->num_cpu_dai; i++) { + cpu_dai = rtd->cpu_dais[i]; + if (cpu_dai->driver->suspend && + !cpu_dai->driver->bus_control) + cpu_dai->driver->suspend(cpu_dai); + } }

/* close any waiting streams */ @@ -552,16 +565,21 @@ int snd_soc_suspend(struct device *dev) }

list_for_each_entry(rtd, &card->rtd_list, list) { - struct snd_soc_dai *cpu_dai = rtd->cpu_dai; + struct snd_soc_dai *cpu_dai;

if (rtd->dai_link->ignore_suspend) continue;

- if (cpu_dai->driver->suspend && cpu_dai->driver->bus_control) - cpu_dai->driver->suspend(cpu_dai); + for (i = 0; i < rtd->num_cpu_dai; i++) { + cpu_dai = rtd->cpu_dais[i];

- /* deactivate pins to sleep state */ - pinctrl_pm_select_sleep_state(cpu_dai->dev); + if (cpu_dai->driver->suspend && + cpu_dai->driver->bus_control) + cpu_dai->driver->suspend(cpu_dai); + + /* deactivate pins to sleep state */ + pinctrl_pm_select_sleep_state(cpu_dai->dev); + } }

if (card->suspend_post) @@ -596,13 +614,18 @@ static void soc_resume_deferred(struct work_struct *work)

/* resume control bus DAIs */ list_for_each_entry(rtd, &card->rtd_list, list) { - struct snd_soc_dai *cpu_dai = rtd->cpu_dai; + struct snd_soc_dai *cpu_dai;

if (rtd->dai_link->ignore_suspend) continue;

- if (cpu_dai->driver->resume && cpu_dai->driver->bus_control) - cpu_dai->driver->resume(cpu_dai); + for (i = 0; i < rtd->num_cpu_dai; i++) { + cpu_dai = rtd->cpu_dais[i]; + + if (cpu_dai->driver->resume && + cpu_dai->driver->bus_control) + cpu_dai->driver->resume(cpu_dai); + } }

list_for_each_entry(component, &card->component_dev_list, card_list) { @@ -648,8 +671,13 @@ static void soc_resume_deferred(struct work_struct *work) if (rtd->dai_link->ignore_suspend) continue;

- if (cpu_dai->driver->resume && !cpu_dai->driver->bus_control) - cpu_dai->driver->resume(cpu_dai); + for (i = 0; i < rtd->num_cpu_dai; i++) { + cpu_dai = rtd->cpu_dais[i]; + + if (cpu_dai->driver->resume && + !cpu_dai->driver->bus_control) + cpu_dai->driver->resume(cpu_dai); + } }

if (card->resume_post) @@ -671,6 +699,7 @@ int snd_soc_resume(struct device *dev) struct snd_soc_card *card = dev_get_drvdata(dev); bool bus_control = false; struct snd_soc_pcm_runtime *rtd; + int i;

/* If the card is not initialized yet there is nothing to do */ if (!card->instantiated) @@ -679,11 +708,16 @@ int snd_soc_resume(struct device *dev) /* activate pins from sleep state */ list_for_each_entry(rtd, &card->rtd_list, list) { struct snd_soc_dai **codec_dais = rtd->codec_dais; - struct snd_soc_dai *cpu_dai = rtd->cpu_dai; + struct snd_soc_dai **cpu_dais = rtd->cpu_dais; + struct snd_soc_dai *cpu_dai; int j;

- if (cpu_dai->active) - pinctrl_pm_select_default_state(cpu_dai->dev); + for (j = 0; j < rtd->num_cpu_dai; j++) { + cpu_dai = cpu_dais[j]; + + if (cpu_dai->active) + pinctrl_pm_select_default_state(cpu_dai->dev); + }

for (j = 0; j < rtd->num_codecs; j++) { struct snd_soc_dai *codec_dai = codec_dais[j]; @@ -699,8 +733,11 @@ int snd_soc_resume(struct device *dev) * due to I/O costs and anti-pop so handle them out of line. */ list_for_each_entry(rtd, &card->rtd_list, list) { - struct snd_soc_dai *cpu_dai = rtd->cpu_dai; - bus_control |= cpu_dai->driver->bus_control; + for (i = 0; i < rtd->num_cpu_dai; i++) { + struct snd_soc_dai *cpu_dai = rtd->cpu_dais[i]; + + bus_control |= cpu_dai->driver->bus_control; + } } if (bus_control) { dev_dbg(dev, "ASoC: Resuming control bus master immediately\n"); @@ -845,35 +882,47 @@ static int soc_bind_dai_link(struct snd_soc_card *card, { struct snd_soc_pcm_runtime *rtd; struct snd_soc_dai_link_component *codecs = dai_link->codecs; - struct snd_soc_dai_link_component cpu_dai_component; + struct snd_soc_dai_link_component *cpu_dai_component; struct snd_soc_component *component; - struct snd_soc_dai **codec_dais; + struct snd_soc_dai **codec_dais, **cpu_dais; struct device_node *platform_of_node; const char *platform_name; int i;

dev_dbg(card->dev, "ASoC: binding %s\n", dai_link->name);

+ cpu_dai_component = dai_link->cpu_dai; + if (soc_is_dai_link_bound(card, dai_link)) { dev_dbg(card->dev, "ASoC: dai link %s already bound\n", dai_link->name); return 0; }

+ if (dai_link->dynamic && dai_link->num_cpu_dai > 1) { + dev_err(card->dev, "ASoC: Multi CPU DAI not supported for FE"); + return -EINVAL; + } + rtd = soc_new_pcm_runtime(card, dai_link); if (!rtd) return -ENOMEM;

- cpu_dai_component.name = dai_link->cpu_name; - cpu_dai_component.of_node = dai_link->cpu_of_node; - cpu_dai_component.dai_name = dai_link->cpu_dai_name; - rtd->cpu_dai = snd_soc_find_dai(&cpu_dai_component); - if (!rtd->cpu_dai) { - dev_info(card->dev, "ASoC: CPU DAI %s not registered\n", - dai_link->cpu_dai_name); - goto _err_defer; + rtd->num_cpu_dai = dai_link->num_cpu_dai; + + cpu_dais = rtd->cpu_dais; + for (i = 0; i < rtd->num_cpu_dai; i++) { + cpu_dais[i] = snd_soc_find_dai(&cpu_dai_component[i]); + if (!cpu_dais[i]) { + dev_err(card->dev, "ASoC: CPU DAI %s not registered\n", + cpu_dai_component[i].dai_name); + goto _err_defer; + } + snd_soc_rtdcom_add(rtd, cpu_dais[i]->component); } - snd_soc_rtdcom_add(rtd, rtd->cpu_dai->component); + + /* Fill cpu_dai in the runtime data */ + rtd->cpu_dai = cpu_dais[0];

rtd->num_codecs = dai_link->num_codecs;

@@ -971,7 +1020,8 @@ static void soc_remove_link_dais(struct snd_soc_card *card, for (i = 0; i < rtd->num_codecs; i++) soc_remove_dai(rtd->codec_dais[i], order);

- soc_remove_dai(rtd->cpu_dai, order); + for (i = 0; i < rtd->num_cpu_dai; i++) + soc_remove_dai(rtd->cpu_dais[i], order); }

static void soc_remove_link_components(struct snd_soc_card *card, @@ -1043,6 +1093,30 @@ static int snd_soc_init_multicodec(struct snd_soc_card *card, return 0; }

+static int snd_soc_init_single_cpu_dai(struct snd_soc_card *card, + struct snd_soc_dai_link *dai_link) +{ + if (dai_link->cpu_name || dai_link->cpu_of_node || + dai_link->cpu_dai_name) { + dai_link->num_cpu_dai = 1; + dai_link->cpu_dai = devm_kzalloc(card->dev, + sizeof(struct snd_soc_dai_link_component), + GFP_KERNEL); + + if (!dai_link->cpu_dai) + return -ENOMEM; + + dai_link->cpu_dai[0].name = dai_link->cpu_name; + dai_link->cpu_dai[0].of_node = dai_link->cpu_of_node; + dai_link->cpu_dai[0].dai_name = dai_link->cpu_dai_name; + } else if (!dai_link->cpu_dai) { + dev_err(card->dev, "ASoC: DAI link has no DAIs\n"); + return -EINVAL; + } + + return 0; +} + static int soc_init_dai_link(struct snd_soc_card *card, struct snd_soc_dai_link *link) { @@ -1054,6 +1128,12 @@ static int soc_init_dai_link(struct snd_soc_card *card, return ret; }

+ ret = snd_soc_init_single_cpu_dai(card, link); + if (ret) { + dev_err(card->dev, "ASoC: failed to init cpu\n"); + return ret; + } + for (i = 0; i < link->num_codecs; i++) { /* * Codec must be specified by 1 of name or OF node, @@ -1089,24 +1169,28 @@ static int soc_init_dai_link(struct snd_soc_card *card, * can be left unspecified, and will be matched based on DAI * name alone.. */ - if (link->cpu_name && link->cpu_of_node) { - dev_err(card->dev, - "ASoC: Neither/both cpu name/of_node are set for %s\n", - link->name); - return -EINVAL; - } - /* - * At least one of CPU DAI name or CPU device name/node must be - * specified - */ - if (!link->cpu_dai_name && - !(link->cpu_name || link->cpu_of_node)) { - dev_err(card->dev, - "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n", - link->name); - return -EINVAL; - }

+ for (i = 0; i < link->num_cpu_dai; i++) { + if (link->cpu_dai[i].name && + link->cpu_dai[i].of_node) { + dev_err(card->dev, + "ASoC: Neither/both cpu name/of_node are set for %s\n", + link->cpu_dai[i].name); + return -EINVAL; + } + + /* + * At least one of CPU DAI name or CPU device name/node must be + * specified + */ + if (!link->cpu_dai[i].dai_name && + !(link->cpu_dai[i].name || link->cpu_dai[i].of_node)) { + dev_err(card->dev, + "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n", + link->name); + return -EINVAL; + } + } return 0; }

@@ -1426,6 +1510,9 @@ static int soc_link_dai_widgets(struct snd_soc_card *card, if (rtd->num_codecs > 1) dev_warn(card->dev, "ASoC: Multiple codecs not supported yet\n");

+ if (rtd->num_cpu_dai > 1) + dev_warn(card->dev, "ASoC: Multiple CPU DAIs not supported yet\n"); + /* link the DAI widgets */ sink = codec_dai->playback_widget; source = cpu_dai->capture_widget; @@ -1456,12 +1543,24 @@ static int soc_link_dai_widgets(struct snd_soc_card *card, return 0; }

+static bool soc_check_compress_dais(struct snd_soc_pcm_runtime *rtd) +{ + int i; + + for (i = 0; i < rtd->num_cpu_dai; i++) { + if (!rtd->cpu_dais[i]->driver->compress_new) + return false; + } + + return true; +} + static int soc_probe_link_dais(struct snd_soc_card *card, struct snd_soc_pcm_runtime *rtd, int order) { struct snd_soc_dai_link *dai_link = rtd->dai_link; - struct snd_soc_dai *cpu_dai = rtd->cpu_dai; int i, ret; + bool is_compress;

dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n", card->name, rtd->num, order); @@ -1469,9 +1568,11 @@ static int soc_probe_link_dais(struct snd_soc_card *card, /* set default power off timeout */ rtd->pmdown_time = pmdown_time;

- ret = soc_probe_dai(cpu_dai, order); - if (ret) - return ret; + for (i = 0; i < rtd->num_cpu_dai; i++) { + ret = soc_probe_dai(rtd->cpu_dais[i], order); + if (ret) + return ret; + }

/* probe the CODEC DAI */ for (i = 0; i < rtd->num_codecs; i++) { @@ -1507,9 +1608,14 @@ static int soc_probe_link_dais(struct snd_soc_card *card, soc_dpcm_debugfs_add(rtd); #endif

- if (cpu_dai->driver->compress_new) { + is_compress = soc_check_compress_dais(rtd); + if (is_compress) { + if (rtd->num_cpu_dai > 1) + dev_warn(card->dev, + "ASoC: multi-cpu compress dais not supported"); + /*create compress_device"*/ - ret = cpu_dai->driver->compress_new(rtd, rtd->num); + ret = rtd->cpu_dais[0]->driver->compress_new(rtd, rtd->num); if (ret < 0) { dev_err(card->dev, "ASoC: can't create compress %s\n", dai_link->stream_name); @@ -1525,7 +1631,8 @@ static int soc_probe_link_dais(struct snd_soc_card *card, dai_link->stream_name, ret); return ret; } - ret = soc_link_dai_pcm_new(&cpu_dai, 1, rtd); + ret = soc_link_dai_pcm_new(rtd->cpu_dais, + rtd->num_cpu_dai, rtd); if (ret < 0) return ret; ret = soc_link_dai_pcm_new(rtd->codec_dais, @@ -1644,7 +1751,7 @@ int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd, unsigned int dai_fmt) { struct snd_soc_dai **codec_dais = rtd->codec_dais; - struct snd_soc_dai *cpu_dai = rtd->cpu_dai; + struct snd_soc_dai **cpu_dais = rtd->cpu_dais; unsigned int i; int ret;

@@ -1659,35 +1766,44 @@ int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd, } }

- /* Flip the polarity for the "CPU" end of a CODEC<->CODEC link */ /* the component which has non_legacy_dai_naming is Codec */ - if (cpu_dai->component->driver->non_legacy_dai_naming) { - unsigned int inv_dai_fmt; + for (i = 0; i < rtd->num_cpu_dai; i++) { + struct snd_soc_dai *cpu_dai = cpu_dais[i]; + unsigned int inv_dai_fmt, temp_dai_fmt;

- inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK; - switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) { - case SND_SOC_DAIFMT_CBM_CFM: - inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS; - break; - case SND_SOC_DAIFMT_CBM_CFS: - inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM; - break; - case SND_SOC_DAIFMT_CBS_CFM: - inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS; - break; - case SND_SOC_DAIFMT_CBS_CFS: - inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM; - break; - } + temp_dai_fmt = dai_fmt; + if (cpu_dai->component->driver->non_legacy_dai_naming) {

- dai_fmt = inv_dai_fmt; - } + inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK;

- ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt); - if (ret != 0 && ret != -ENOTSUPP) { - dev_warn(cpu_dai->dev, - "ASoC: Failed to set DAI format: %d\n", ret); - return ret; + switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) { + case SND_SOC_DAIFMT_CBM_CFM: + inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS; + break; + + case SND_SOC_DAIFMT_CBM_CFS: + inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM; + break; + + case SND_SOC_DAIFMT_CBS_CFM: + inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS; + break; + + case SND_SOC_DAIFMT_CBS_CFS: + inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM; + break; + + } + + temp_dai_fmt = inv_dai_fmt; + } + + ret = snd_soc_dai_set_fmt(cpu_dai, temp_dai_fmt); + if (ret != 0 && ret != -ENOTSUPP) { + dev_warn(cpu_dai->dev, + "ASoC: Failed to set DAI format: %d\n", ret); + return ret; + } }

return 0; @@ -2121,10 +2237,11 @@ int snd_soc_poweroff(struct device *dev)

/* deactivate pins to sleep state */ list_for_each_entry(rtd, &card->rtd_list, list) { - struct snd_soc_dai *cpu_dai = rtd->cpu_dai; int i;

- pinctrl_pm_select_sleep_state(cpu_dai->dev); + for (i = 0; i < rtd->num_cpu_dai; i++) + pinctrl_pm_select_sleep_state(rtd->cpu_dais[i]->dev); + for (i = 0; i < rtd->num_codecs; i++) { struct snd_soc_dai *codec_dai = rtd->codec_dais[i]; pinctrl_pm_select_sleep_state(codec_dai->dev); @@ -2609,7 +2726,7 @@ int snd_soc_register_card(struct snd_soc_card *card)

/* deactivate pins to sleep state */ list_for_each_entry(rtd, &card->rtd_list, list) { - struct snd_soc_dai *cpu_dai = rtd->cpu_dai; + struct snd_soc_dai *cpu_dai; int j;

for (j = 0; j < rtd->num_codecs; j++) { @@ -2618,8 +2735,11 @@ int snd_soc_register_card(struct snd_soc_card *card) pinctrl_pm_select_sleep_state(codec_dai->dev); }

- if (!cpu_dai->active) - pinctrl_pm_select_sleep_state(cpu_dai->dev); + for (j = 0; j < rtd->num_cpu_dai; j++) { + cpu_dai = rtd->cpu_dais[j]; + if (!cpu_dai->active) + pinctrl_pm_select_sleep_state(cpu_dai->dev); + } }

return ret;