ASoC: snd_soc_component_driver has snd_pcm_ops

Platform will be replaced into Component in the future.
snd_soc_platform_driver has snd_pcm_ops, but snd_soc_component_driver
doesn't have it. To prepare for replacing, this patch adds snd_pcm_ops
on component driver.

platform will be replaced into component, and its code will be removed.
But during replacing, both platform and component process code exists.
To keep compatibility, to avoid platform NULL access and to avoid
platform/component duplicate operation during replacing process, this
patch has such code. Some of this code will be removed when platform was
removed.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

include/sound/soc.h

@@ -826,6 +826,8 @@ struct snd_soc_component_driver {
 	int (*set_bias_level)(struct snd_soc_component *component,
 			      enum snd_soc_bias_level level);
 
+	const struct snd_pcm_ops *ops;
+
 	/* probe ordering - for components with runtime dependencies */
 	int probe_order;
 	int remove_order;

sound/soc/soc-pcm.c

@@ -459,7 +459,7 @@ static int soc_pcm_open(struct snd_pcm_substream *substream)
 	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 	struct snd_soc_dai *codec_dai;
 	const char *codec_dai_name = "multicodec";
-	int i, ret = 0;
+	int i, ret = 0, __ret;
 
 	pinctrl_pm_select_default_state(cpu_dai->dev);
 	for (i = 0; i < rtd->num_codecs; i++)
@@ -483,7 +483,7 @@ static int soc_pcm_open(struct snd_pcm_substream *substream)
 		}
 	}
 
-	if (platform->driver->ops && platform->driver->ops->open) {
+	if (platform && platform->driver->ops && platform->driver->ops->open) {
 		ret = platform->driver->ops->open(substream);
 		if (ret < 0) {
 			dev_err(platform->dev, "ASoC: can't open platform"
@@ -492,6 +492,29 @@ static int soc_pcm_open(struct snd_pcm_substream *substream)
 		}
 	}
 
+	ret = 0;
+	for_each_rtdcom(rtd, rtdcom) {
+		component = rtdcom->component;
+
+		/* ignore duplication for now */
+		if (platform && (component == &platform->component))
+			continue;
+
+		if (!component->driver->ops ||
+		    !component->driver->ops->open)
+			continue;
+
+		__ret = component->driver->ops->open(substream);
+		if (__ret < 0) {
+			dev_err(component->dev,
+				"ASoC: can't open component %s: %d\n",
+				component->name, ret);
+			ret = __ret;
+		}
+	}
+	if (ret < 0)
+		goto component_err;
+
 	for (i = 0; i < rtd->num_codecs; i++) {
 		codec_dai = rtd->codec_dais[i];
 		if (codec_dai->driver->ops->startup) {
@@ -598,7 +621,22 @@ codec_dai_err:
 			codec_dai->driver->ops->shutdown(substream, codec_dai);
 	}
 
-	if (platform->driver->ops && platform->driver->ops->close)
+component_err:
+	for_each_rtdcom(rtd, rtdcom) {
+		component = rtdcom->component;
+
+		/* ignore duplication for now */
+		if (platform && (component == &platform->component))
+			continue;
+
+		if (!component->driver->ops ||
+		    !component->driver->ops->close)
+			continue;
+
+		component->driver->ops->close(substream);
+	}
+
+	if (platform && platform->driver->ops && platform->driver->ops->close)
 		platform->driver->ops->close(substream);
 
 platform_err:
@@ -695,9 +733,23 @@ static int soc_pcm_close(struct snd_pcm_substream *substream)
 	if (rtd->dai_link->ops->shutdown)
 		rtd->dai_link->ops->shutdown(substream);
 
-	if (platform->driver->ops && platform->driver->ops->close)
+	if (platform && platform->driver->ops && platform->driver->ops->close)
 		platform->driver->ops->close(substream);
 
+	for_each_rtdcom(rtd, rtdcom) {
+		component = rtdcom->component;
+
+		/* ignore duplication for now */
+		if (platform && (component == &platform->component))
+			continue;
+
+		if (!component->driver->ops ||
+		    !component->driver->ops->close)
+			continue;
+
+		component->driver->ops->close(substream);
+	}
+
 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 		if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
 			/* powered down playback stream now */
@@ -745,6 +797,8 @@ static int soc_pcm_prepare(struct snd_pcm_substream *substream)
 {
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct snd_soc_platform *platform = rtd->platform;
+	struct snd_soc_component *component;
+	struct snd_soc_rtdcom_list *rtdcom;
 	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 	struct snd_soc_dai *codec_dai;
 	int i, ret = 0;
@@ -760,7 +814,7 @@ static int soc_pcm_prepare(struct snd_pcm_substream *substream)
 		}
 	}
 
-	if (platform->driver->ops && platform->driver->ops->prepare) {
+	if (platform && platform->driver->ops && platform->driver->ops->prepare) {
 		ret = platform->driver->ops->prepare(substream);
 		if (ret < 0) {
 			dev_err(platform->dev, "ASoC: platform prepare error:"
@@ -769,6 +823,25 @@ static int soc_pcm_prepare(struct snd_pcm_substream *substream)
 		}
 	}
 
+	for_each_rtdcom(rtd, rtdcom) {
+		component = rtdcom->component;
+
+		/* ignore duplication for now */
+		if (platform && (component == &platform->component))
+			continue;
+
+		if (!component->driver->ops ||
+		    !component->driver->ops->prepare)
+			continue;
+
+		ret = component->driver->ops->prepare(substream);
+		if (ret < 0) {
+			dev_err(component->dev,
+				"ASoC: platform prepare error: %d\n", ret);
+			goto out;
+		}
+	}
+
 	for (i = 0; i < rtd->num_codecs; i++) {
 		codec_dai = rtd->codec_dais[i];
 		if (codec_dai->driver->ops->prepare) {
@@ -851,8 +924,10 @@ static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
 {
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct snd_soc_platform *platform = rtd->platform;
+	struct snd_soc_component *component;
+	struct snd_soc_rtdcom_list *rtdcom;
 	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
-	int i, ret = 0;
+	int i, ret = 0, __ret;
 
 	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 	if (rtd->dai_link->ops->hw_params) {
@@ -910,7 +985,7 @@ static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
 	if (ret < 0)
 		goto interface_err;
 
-	if (platform->driver->ops && platform->driver->ops->hw_params) {
+	if (platform && platform->driver->ops && platform->driver->ops->hw_params) {
 		ret = platform->driver->ops->hw_params(substream, params);
 		if (ret < 0) {
 			dev_err(platform->dev, "ASoC: %s hw params failed: %d\n",
@@ -919,20 +994,60 @@ static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
 		}
 	}
 
+	ret = 0;
+	for_each_rtdcom(rtd, rtdcom) {
+		component = rtdcom->component;
+
+		/* ignore duplication for now */
+		if (platform && (component == &platform->component))
+			continue;
+
+		if (!component->driver->ops ||
+		    !component->driver->ops->hw_params)
+			continue;
+
+		__ret = component->driver->ops->hw_params(substream, params);
+		if (__ret < 0) {
+			dev_err(component->dev,
+				"ASoC: %s hw params failed: %d\n",
+				component->name, ret);
+			ret = __ret;
+		}
+	}
+	if (ret < 0)
+		goto component_err;
+
 	/* store the parameters for each DAIs */
 	cpu_dai->rate = params_rate(params);
 	cpu_dai->channels = params_channels(params);
 	cpu_dai->sample_bits =
 		snd_pcm_format_physical_width(params_format(params));
 
-
 	ret = soc_pcm_params_symmetry(substream, params);
         if (ret)
-                goto platform_err;
+		goto component_err;
 out:
 	mutex_unlock(&rtd->pcm_mutex);
 	return ret;
 
+component_err:
+	for_each_rtdcom(rtd, rtdcom) {
+		component = rtdcom->component;
+
+		/* ignore duplication */
+		if (platform && (component == &platform->component))
+			continue;
+
+		if (!component->driver->ops ||
+		    !component->driver->ops->hw_free)
+			continue;
+
+		component->driver->ops->hw_free(substream);
+	}
+
+	if (platform && platform->driver->ops && platform->driver->ops->hw_free)
+		platform->driver->ops->hw_free(substream);
+
 platform_err:
 	if (cpu_dai->driver->ops->hw_free)
 		cpu_dai->driver->ops->hw_free(substream, cpu_dai);
@@ -962,6 +1077,8 @@ static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
 {
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct snd_soc_platform *platform = rtd->platform;
+	struct snd_soc_component *component;
+	struct snd_soc_rtdcom_list *rtdcom;
 	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 	struct snd_soc_dai *codec_dai;
 	bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
@@ -998,9 +1115,24 @@ static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
 		rtd->dai_link->ops->hw_free(substream);
 
 	/* free any DMA resources */
-	if (platform->driver->ops && platform->driver->ops->hw_free)
+	if (platform && platform->driver->ops && platform->driver->ops->hw_free)
 		platform->driver->ops->hw_free(substream);
 
+	/* free any component resources */
+	for_each_rtdcom(rtd, rtdcom) {
+		component = rtdcom->component;
+
+		/* ignore duplication for now */
+		if (platform && (component == &platform->component))
+			continue;
+
+		if (!component->driver->ops ||
+		    !component->driver->ops->hw_free)
+			continue;
+
+		component->driver->ops->hw_free(substream);
+	}
+
 	/* now free hw params for the DAIs  */
 	for (i = 0; i < rtd->num_codecs; i++) {
 		codec_dai = rtd->codec_dais[i];
@@ -1019,6 +1151,8 @@ static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 {
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct snd_soc_platform *platform = rtd->platform;
+	struct snd_soc_component *component;
+	struct snd_soc_rtdcom_list *rtdcom;
 	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 	struct snd_soc_dai *codec_dai;
 	int i, ret;
@@ -1033,12 +1167,28 @@ static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 		}
 	}
 
-	if (platform->driver->ops && platform->driver->ops->trigger) {
+	if (platform && platform->driver->ops && platform->driver->ops->trigger) {
 		ret = platform->driver->ops->trigger(substream, cmd);
 		if (ret < 0)
 			return ret;
 	}
 
+	for_each_rtdcom(rtd, rtdcom) {
+		component = rtdcom->component;
+
+		/* ignore duplication for now */
+		if (platform && (component == &platform->component))
+			continue;
+
+		if (!component->driver->ops ||
+		    !component->driver->ops->trigger)
+			continue;
+
+		ret = component->driver->ops->trigger(substream, cmd);
+		if (ret < 0)
+			return ret;
+	}
+
 	if (cpu_dai->driver->ops->trigger) {
 		ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
 		if (ret < 0)
@@ -1088,6 +1238,8 @@ static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
 {
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct snd_soc_platform *platform = rtd->platform;
+	struct snd_soc_component *component;
+	struct snd_soc_rtdcom_list *rtdcom;
 	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 	struct snd_soc_dai *codec_dai;
 	struct snd_pcm_runtime *runtime = substream->runtime;
@@ -1096,9 +1248,25 @@ static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
 	snd_pcm_sframes_t codec_delay = 0;
 	int i;
 
-	if (platform->driver->ops && platform->driver->ops->pointer)
+	if (platform && platform->driver->ops && platform->driver->ops->pointer)
 		offset = platform->driver->ops->pointer(substream);
 
+	for_each_rtdcom(rtd, rtdcom) {
+		component = rtdcom->component;
+
+		/* ignore duplication for now */
+		if (platform && (component == &platform->component))
+			continue;
+
+		if (!component->driver->ops ||
+		    !component->driver->ops->pointer)
+			continue;
+
+		/* FIXME: use 1st pointer */
+		offset = component->driver->ops->pointer(substream);
+		break;
+	}
+
 	if (cpu_dai->driver->ops->delay)
 		delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
 
@@ -2283,9 +2451,27 @@ static int soc_pcm_ioctl(struct snd_pcm_substream *substream,
 {
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct snd_soc_platform *platform = rtd->platform;
+	struct snd_soc_component *component;
+	struct snd_soc_rtdcom_list *rtdcom;
 
-	if (platform->driver->ops && platform->driver->ops->ioctl)
+	if (platform && platform->driver->ops && platform->driver->ops->ioctl)
 		return platform->driver->ops->ioctl(substream, cmd, arg);
+
+	for_each_rtdcom(rtd, rtdcom) {
+		component = rtdcom->component;
+
+		/* ignore duplication for now */
+		if (platform && (component == &platform->component))
+			continue;
+
+		if (!component->driver->ops ||
+		    !component->driver->ops->ioctl)
+			continue;
+
+		/* FIXME: use 1st ioctl */
+		return component->driver->ops->ioctl(substream, cmd, arg);
+	}
+
 	return snd_pcm_lib_ioctl(substream, cmd, arg);
 }
 
@@ -2647,6 +2833,138 @@ static void soc_pcm_private_free(struct snd_pcm *pcm)
 	}
 }
 
+static int soc_rtdcom_ack(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_rtdcom_list *rtdcom;
+	struct snd_soc_component *component;
+
+	for_each_rtdcom(rtd, rtdcom) {
+		component = rtdcom->component;
+
+		if (!component->driver->ops ||
+		    !component->driver->ops->ack)
+			continue;
+
+		/* FIXME. it returns 1st ask now */
+		return component->driver->ops->ack(substream);
+	}
+
+	return -EINVAL;
+}
+
+static int soc_rtdcom_copy_user(struct snd_pcm_substream *substream, int channel,
+				unsigned long pos, void __user *buf,
+				unsigned long bytes)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_rtdcom_list *rtdcom;
+	struct snd_soc_component *component;
+
+	for_each_rtdcom(rtd, rtdcom) {
+		component = rtdcom->component;
+
+		if (!component->driver->ops ||
+		    !component->driver->ops->copy_user)
+			continue;
+
+		/* FIXME. it returns 1st copy now */
+		return component->driver->ops->copy_user(substream, channel,
+							 pos, buf, bytes);
+	}
+
+	return -EINVAL;
+}
+
+static int soc_rtdcom_copy_kernel(struct snd_pcm_substream *substream, int channel,
+				  unsigned long pos, void *buf, unsigned long bytes)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_rtdcom_list *rtdcom;
+	struct snd_soc_component *component;
+
+	for_each_rtdcom(rtd, rtdcom) {
+		component = rtdcom->component;
+
+		if (!component->driver->ops ||
+		    !component->driver->ops->copy_kernel)
+			continue;
+
+		/* FIXME. it returns 1st copy now */
+		return component->driver->ops->copy_kernel(substream, channel,
+							   pos, buf, bytes);
+	}
+
+	return -EINVAL;
+}
+
+static int soc_rtdcom_fill_silence(struct snd_pcm_substream *substream, int channel,
+				   unsigned long pos, unsigned long bytes)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_rtdcom_list *rtdcom;
+	struct snd_soc_component *component;
+
+	for_each_rtdcom(rtd, rtdcom) {
+		component = rtdcom->component;
+
+		if (!component->driver->ops ||
+		    !component->driver->ops->fill_silence)
+			continue;
+
+		/* FIXME. it returns 1st silence now */
+		return component->driver->ops->fill_silence(substream, channel,
+							    pos, bytes);
+	}
+
+	return -EINVAL;
+}
+
+static struct page *soc_rtdcom_page(struct snd_pcm_substream *substream,
+				    unsigned long offset)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_rtdcom_list *rtdcom;
+	struct snd_soc_component *component;
+	struct page *page;
+
+	for_each_rtdcom(rtd, rtdcom) {
+		component = rtdcom->component;
+
+		if (!component->driver->ops ||
+		    !component->driver->ops->page)
+			continue;
+
+		/* FIXME. it returns 1st page now */
+		page = component->driver->ops->page(substream, offset);
+		if (page)
+			return page;
+	}
+
+	return NULL;
+}
+
+static int soc_rtdcom_mmap(struct snd_pcm_substream *substream,
+			   struct vm_area_struct *vma)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_rtdcom_list *rtdcom;
+	struct snd_soc_component *component;
+
+	for_each_rtdcom(rtd, rtdcom) {
+		component = rtdcom->component;
+
+		if (!component->driver->ops ||
+		    !component->driver->ops->mmap)
+			continue;
+
+		/* FIXME. it returns 1st mmap now */
+		return component->driver->ops->mmap(substream, vma);
+	}
+
+	return -EINVAL;
+}
+
 /* create a new pcm */
 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
 {
@@ -2749,7 +3067,28 @@ int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
 		rtd->ops.ioctl		= soc_pcm_ioctl;
 	}
 
-	if (platform->driver->ops) {
+	for_each_rtdcom(rtd, rtdcom) {
+		const struct snd_pcm_ops *ops = rtdcom->component->driver->ops;
+
+		if (!ops)
+			continue;
+
+		if (ops->ack)
+			rtd->ops.ack		= soc_rtdcom_ack;
+		if (ops->copy_user)
+			rtd->ops.copy_user	= soc_rtdcom_copy_user;
+		if (ops->copy_kernel)
+			rtd->ops.copy_kernel	= soc_rtdcom_copy_kernel;
+		if (ops->fill_silence)
+			rtd->ops.fill_silence	= soc_rtdcom_fill_silence;
+		if (ops->page)
+			rtd->ops.page		= soc_rtdcom_page;
+		if (ops->mmap)
+			rtd->ops.mmap		= soc_rtdcom_mmap;
+	}
+
+	/* overwrite */
+	if (platform && platform->driver->ops) {
 		rtd->ops.ack		= platform->driver->ops->ack;
 		rtd->ops.copy_user	= platform->driver->ops->copy_user;
 		rtd->ops.copy_kernel	= platform->driver->ops->copy_kernel;