ASoC: audio-graph-card2: Introduce playback-only/capture-only DAI link flags

We need this to support MICFIL PDM found on i.MX8MP where the DAI link
supports only capture direction.

Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>
Link: https://msgid.link/r/20231128081119.106360-2-daniel.baluta@oss.nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/include/sound/simple_card_utils.h b/include/sound/simple_card_utils.h
index e5da10b4c43b1fe23e2d44c6512b5352cd8cf37f..ad67957b7b48ccee86e89b80be4fa68e622182ea 100644 (file)
--- a/include/sound/simple_card_utils.h
+++ b/include/sound/simple_card_utils.h
@@ -195,6 +195,9 @@ int graph_util_is_ports0(struct device_node *port);
 int graph_util_parse_dai(struct device *dev, struct device_node *ep,
                         struct snd_soc_dai_link_component *dlc, int *is_single_link);
 
+int graph_util_parse_link_direction(struct device_node *np,
+                                   bool *is_playback_only, bool *is_capture_only);
+
 #ifdef DEBUG
 static inline void simple_util_debug_dai(struct simple_util_priv *priv,
                                         char *name,

diff --git a/sound/soc/generic/audio-graph-card2.c b/sound/soc/generic/audio-graph-card2.c
index 78d9679decda7f951a768db1ff5186183a6f4990..f880a7f73522345752335b9fb9f98d7b7a001e0d 100644 (file)
--- a/sound/soc/generic/audio-graph-card2.c
+++ b/sound/soc/generic/audio-graph-card2.c
@@ -760,6 +760,7 @@ static void graph_link_init(struct simple_util_priv *priv,
        struct device_node *ep;
        struct device_node *ports;
        unsigned int daifmt = 0, daiclk = 0;
+       bool playback_only = 0, capture_only = 0;
        unsigned int bit_frame = 0;
 
        if (graph_lnk_is_multi(port)) {
@@ -798,6 +799,11 @@ static void graph_link_init(struct simple_util_priv *priv,
        if (is_cpu_node)
                daiclk = snd_soc_daifmt_clock_provider_flipped(daiclk);
 
+       graph_util_parse_link_direction(port, &playback_only, &capture_only);
+
+       dai_link->playback_only = playback_only;
+       dai_link->capture_only = capture_only;
+
        dai_link->dai_fmt       = daifmt | daiclk;
        dai_link->init          = simple_util_dai_init;
        dai_link->ops           = &graph_ops;

diff --git a/sound/soc/generic/simple-card-utils.c b/sound/soc/generic/simple-card-utils.c
index cfa70a56ff0f004453cd104daac2bec2305ab440..9006ef5e95f5807c0fb19413a2a0804921f1d027 100644 (file)
--- a/sound/soc/generic/simple-card-utils.c
+++ b/sound/soc/generic/simple-card-utils.c
@@ -1129,6 +1129,25 @@ parse_dai_end:
 }
 EXPORT_SYMBOL_GPL(graph_util_parse_dai);
 
+int graph_util_parse_link_direction(struct device_node *np,
+                                   bool *playback_only, bool *capture_only)
+{
+       bool is_playback_only = false;
+       bool is_capture_only = false;
+
+       is_playback_only = of_property_read_bool(np, "playback-only");
+       is_capture_only = of_property_read_bool(np, "capture-only");
+
+       if (is_playback_only && is_capture_only)
+               return -EINVAL;
+
+       *playback_only = is_playback_only;
+       *capture_only = is_capture_only;
+
+       return 0;
+}
+EXPORT_SYMBOL_GPL(graph_util_parse_link_direction);
+
 /* Module information */
 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
 MODULE_DESCRIPTION("ALSA SoC Simple Card Utils");