From: Kuninori Morimoto kuninori.morimoto.gx@renesas.com
If CPU/Platform side driver probes successfully, and if it is supporting both previous normal sound card style and graph style DT, it can call asoc_simple_card_try_to_probe_graph_card(). It checks graph style DT, and do nothing if it was non graph style DT, or register new simple-graph-card driver if graph style DT.
Signed-off-by: Kuninori Morimoto kuninori.morimoto.gx@renesas.com --- include/sound/simple_card_utils.h | 8 +++++++ sound/soc/generic/simple-card-utils.c | 45 +++++++++++++++++++++++++++++++++++ 2 files changed, 53 insertions(+)
diff --git a/include/sound/simple_card_utils.h b/include/sound/simple_card_utils.h index 4b58954..7006150 100644 --- a/include/sound/simple_card_utils.h +++ b/include/sound/simple_card_utils.h @@ -22,6 +22,10 @@ struct asoc_simple_dai { struct clk *clk; };
+struct asoc_simple_graph_card_info { + int endpoint_num; /* sound endpoint number */ +}; + int asoc_simple_card_parse_daifmt(struct device *dev, struct device_node *node, struct device_node *codec, @@ -78,4 +82,8 @@ void asoc_simple_card_canonicalize_cpu(struct snd_soc_dai_link *dai_link,
int asoc_simple_card_clean_reference(struct snd_soc_card *card);
+void asoc_simple_card_try_to_probe_graph_card(struct device *dev, + struct asoc_simple_graph_card_info *info); + + #endif /* __SIMPLE_CARD_CORE_H */ diff --git a/sound/soc/generic/simple-card-utils.c b/sound/soc/generic/simple-card-utils.c index 373ada3..85120f5 100644 --- a/sound/soc/generic/simple-card-utils.c +++ b/sound/soc/generic/simple-card-utils.c @@ -8,6 +8,7 @@ * published by the Free Software Foundation. */ #include <linux/clk.h> +#include <linux/dma-mapping.h> #include <linux/module.h> #include <linux/of.h> #include <linux/of_graph.h> @@ -285,6 +286,50 @@ int asoc_simple_card_clean_reference(struct snd_soc_card *card) } EXPORT_SYMBOL_GPL(asoc_simple_card_clean_reference);
+void asoc_simple_card_try_to_probe_graph_card(struct device *dev, + struct asoc_simple_graph_card_info *info) +{ + struct platform_device_info pdevinfo; + struct device_node *node; + const char *compatible; + int ret; + + node = of_graph_get_top_port(dev); + if (!node || !info) + /* + * It doesn't have graph base sound DT, or its infomation. + * Do nothing here, It assumes that system has + * normal sound card. + */ + return; + + ret = of_property_read_string(node, "compatible", &compatible); + if (ret < 0) + goto probe_err; + + /* + * FIXME + * + * It should use of_platform_xxx() instead of + * platform_device_register_full() ? but there is no solution. + * see also + * linux/sound/soc/generic/simple-graph-card.c :: asoc_simple_card_probe + */ + + memset(&pdevinfo, 0, sizeof(pdevinfo)); + pdevinfo.parent = dev; + pdevinfo.id = PLATFORM_DEVID_AUTO; + pdevinfo.name = compatible; + pdevinfo.dma_mask = DMA_BIT_MASK(32); + pdevinfo.data = info; + pdevinfo.size_data = sizeof(*info); + platform_device_register_full(&pdevinfo); + +probe_err: + of_node_put(node); +} +EXPORT_SYMBOL_GPL(asoc_simple_card_try_to_probe_graph_card); + /* Module information */ MODULE_AUTHOR("Kuninori Morimoto kuninori.morimoto.gx@renesas.com"); MODULE_DESCRIPTION("ALSA SoC Simple Card Utils");