linux-kernel - [PATCH v2 1/4] ASoC: dmaengine_pcm: Allow passing component name via config

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Message-Id: <20240319-xilinx-dp-audio-v2-1-92d6d3a7ca7e@ideasonboard.com>
Date: Tue, 19 Mar 2024 10:22:36 +0200
From: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
To: Lars-Peter Clausen <lars@...afoo.de>, Jaroslav Kysela <perex@...ex.cz>, 
 Takashi Iwai <tiwai@...e.com>, Liam Girdwood <lgirdwood@...il.com>, 
 Mark Brown <broonie@...nel.org>, 
 Laurent Pinchart <laurent.pinchart@...asonboard.com>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
 David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>, 
 Rob Herring <robh+dt@...nel.org>, 
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, 
 Conor Dooley <conor+dt@...nel.org>, Michal Simek <michal.simek@....com>
Cc: linux-sound@...r.kernel.org, linux-kernel@...r.kernel.org, 
 dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, Vishal Sagar <vishal.sagar@....com>, 
 Anatoliy Klymenko <anatoliy.klymenko@....com>, 
 Péter Ujfalusi <peter.ujfalusi@...il.com>, 
 Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
Subject: [PATCH v2 1/4] ASoC: dmaengine_pcm: Allow passing component name
 via config

At the moment we cannot instantiate two dmaengine_pcms with the same
parent device, as the components will be named the same, leading to
conflicts.

Add 'name' field to the snd_dmaengine_pcm_config, and use that (if
defined) as the component name instead of deriving the component name
from the device.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
---
 include/sound/dmaengine_pcm.h         | 2 ++
 sound/soc/soc-core.c                  | 8 +++++---
 sound/soc/soc-generic-dmaengine-pcm.c | 3 +++
 3 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/include/sound/dmaengine_pcm.h b/include/sound/dmaengine_pcm.h
index d70c55f17df7..c11aaf8079fb 100644
--- a/include/sound/dmaengine_pcm.h
+++ b/include/sound/dmaengine_pcm.h
@@ -118,6 +118,7 @@ int snd_dmaengine_pcm_refine_runtime_hwparams(
  *   which do not use devicetree.
  * @process: Callback used to apply processing on samples transferred from/to
  *   user space.
+ * @name: Component name. If null, dev_name will be used.
  * @compat_filter_fn: Will be used as the filter function when requesting a
  *  channel for platforms which do not use devicetree. The filter parameter
  *  will be the DAI's DMA data.
@@ -143,6 +144,7 @@ struct snd_dmaengine_pcm_config {
 	int (*process)(struct snd_pcm_substream *substream,
 		       int channel, unsigned long hwoff,
 		       unsigned long bytes);
+	const char *name;
 	dma_filter_fn compat_filter_fn;
 	struct device *dma_dev;
 	const char *chan_names[SNDRV_PCM_STREAM_LAST + 1];
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 516350533e73..772d67065611 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -2792,10 +2792,12 @@ int snd_soc_component_initialize(struct snd_soc_component *component,
 	INIT_LIST_HEAD(&component->list);
 	mutex_init(&component->io_mutex);
 
-	component->name = fmt_single_name(dev, &component->id);
 	if (!component->name) {
-		dev_err(dev, "ASoC: Failed to allocate name\n");
-		return -ENOMEM;
+		component->name = fmt_single_name(dev, &component->id);
+		if (!component->name) {
+			dev_err(dev, "ASoC: Failed to allocate name\n");
+			return -ENOMEM;
+		}
 	}
 
 	component->dev		= dev;
diff --git a/sound/soc/soc-generic-dmaengine-pcm.c b/sound/soc/soc-generic-dmaengine-pcm.c
index 092ca09f3631..83db1a83d8ba 100644
--- a/sound/soc/soc-generic-dmaengine-pcm.c
+++ b/sound/soc/soc-generic-dmaengine-pcm.c
@@ -441,6 +441,9 @@ int snd_dmaengine_pcm_register(struct device *dev,
 	pcm->config = config;
 	pcm->flags = flags;
 
+	if (config->name)
+		pcm->component.name = config->name;
+
 	ret = dmaengine_pcm_request_chan_of(pcm, dev, config);
 	if (ret)
 		goto err_free_dma;

-- 
2.34.1