From: Daniel Baluta daniel.baluta@nxp.com

We need this to signal that DAI link supports only one direction that can only be either playback or capture. --- include/sound/simple_card_utils.h | 3 +++ sound/soc/generic/audio-graph-card2.c | 6 ++++++ sound/soc/generic/simple-card-utils.c | 19 +++++++++++++++++++ 3 files changed, 28 insertions(+)

diff --git a/include/sound/simple_card_utils.h b/include/sound/simple_card_utils.h index e5da10b4c43b..ad67957b7b48 100644 --- 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 7146611df730..04c2eac881c2 100644 --- a/sound/soc/generic/audio-graph-card2.c +++ b/sound/soc/generic/audio-graph-card2.c @@ -597,6 +597,7 @@ 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)) { @@ -635,6 +636,11 @@ 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 cfa70a56ff0f..9006ef5e95f5 100644 --- a/sound/soc/generic/simple-card-utils.c +++ b/sound/soc/generic/simple-card-utils.c @@ -1129,6 +1129,25 @@ int graph_util_parse_dai(struct device *dev, struct device_node *ep, } 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");

From: Daniel Baluta daniel.baluta@nxp.com

Document new playback-only and capture-only flags which can be used when dai link can only support just one direction: playback or capture but not both.

Signed-off-by: Daniel Baluta daniel.baluta@nxp.com --- .../devicetree/bindings/sound/audio-graph-port.yaml | 6 ++++++ 1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/audio-graph-port.yaml b/Documentation/devicetree/bindings/sound/audio-graph-port.yaml index 60b5e3fd1115..b13c08de505e 100644 --- a/Documentation/devicetree/bindings/sound/audio-graph-port.yaml +++ b/Documentation/devicetree/bindings/sound/audio-graph-port.yaml @@ -19,6 +19,12 @@ definitions: properties: mclk-fs: $ref: simple-card.yaml#/definitions/mclk-fs + playback-only: + description: port connection used only for playback + $ref: /schemas/types.yaml#/definitions/flag + capture-only: + description: port connection used only for capture + $ref: /schemas/types.yaml#/definitions/flag

endpoint-base: allOf: