[alsa-devel] [PATCH v7 05/11] ASoC: topology: ABI - Update physical DAI link configuration for version 5

[mengdong.lin at linux.intel.com]

From: Mengdong Lin <mengdong.lin at linux.intel.com>

The following fields are added to physical link configuration struct
(snd_soc_tplg_link_config) in ABI v5:

- name and stream name
  Topology will use them to find an existing physical link and configure
  it.

- HW configurations
  Define the types and ABI struct for runtime supported hardware configs
  of physical DAI links, e.g. audio hardware formats. The default HW
  config ID will help topology to find the DAI format to set on init.
  Topology provides this as a fallback if such HW settings are not
  available in ACPI or device tree, to avoid hard code in drivers. It's
  only for config items that can be programmed by SW or FW, not for
  physical things like link connections or GPIO used for HP etc.

- flags and private data
  The flags will be used to configure an existing physical DAI link.
  The private data is reserved for future extension.

NOTE: Current kernel has no support for physical links. A later patch
will add support for configuring physical links and make the support
backward compatible for ABI v4.

Signed-off-by: Mengdong Lin <mengdong.lin at linux.intel.com>

diff --git a/include/uapi/sound/asoc.h b/include/uapi/sound/asoc.h
index aeb4082..ed28ebc 100644
--- a/include/uapi/sound/asoc.h
+++ b/include/uapi/sound/asoc.h
@@ -39,6 +39,11 @@
  */
 #define SND_SOC_TPLG_STREAM_CONFIG_MAX  8
 
+/*
+ * Maximum number of physical link's hardware configs
+ */
+#define SND_SOC_TPLG_HW_CONFIG_MAX	8
+
 /* individual kcontrol info types - can be mixed with other types */
 #define SND_SOC_TPLG_CTL_VOLSW		1
 #define SND_SOC_TPLG_CTL_VOLSW_SX	2
@@ -294,6 +299,35 @@ struct snd_soc_tplg_stream {
 	__le32 channels;	/* channels */
 } __attribute__((packed));
 
+
+/*
+ * Describes a physical link's runtime supported hardware config,
+ * i.e. hardware audio formats.
+ */
+struct snd_soc_tplg_hw_config {
+	__le32 size;            /* in bytes of this structure */
+	__le32 id;		/* unique ID - - used to match */
+	__le32 fmt;		/* SND_SOC_DAI_FORMAT_ format value */
+	__u8 clock_gated;	/* 1 if clock can be gated to save power */
+	__u8 invert_bclk;	/* 1 for inverted BCLK, 0 for normal */
+	__u8 invert_fsync;	/* 1 for inverted frame clock, 0 for normal */
+	__u8 bclk_master;	/* 1 for master of BCLK, 0 for slave */
+	__u8 fsync_master;	/* 1 for master of FSYNC, 0 for slave */
+	__u8 mclk_direction;    /* 0 for input, 1 for output */
+	__le16 reserved;	/* for 32bit alignment */
+	__le32 mclk_rate;	/* MCLK or SYSCLK freqency in Hz */
+	__le32 bclk_rate;	/* BCLK freqency in Hz */
+	__le32 fsync_rate;	/* frame clock in Hz */
+	__le32 tdm_slots;	/* number of TDM slots in use */
+	__le32 tdm_slot_width;	/* width in bits for each slot */
+	__le32 tx_slots;	/* bit mask for active Tx slots */
+	__le32 rx_slots;	/* bit mask for active Rx slots */
+	__le32 tx_channels;	/* number of Tx channels */
+	__le32 tx_chanmap[SND_SOC_TPLG_MAX_CHAN]; /* array of slot number */
+	__le32 rx_channels;	/* number of Rx channels */
+	__le32 rx_chanmap[SND_SOC_TPLG_MAX_CHAN]; /* array of slot number */
+} __attribute__((packed));
+
 /*
  * Manifest. List totals for each payload type. Not used in parsing, but will
  * be passed to the component driver before any other objects in order for any
@@ -468,9 +502,9 @@ struct snd_soc_tplg_pcm {
 
 
 /*
- * Describes the BE or CC link runtime supported configs or params
+ * Describes the physical link runtime supported configs or params
  *
- * File block representation for BE/CC link config :-
+ * File block representation for physical link config :-
  * +-----------------------------------+-----+
  * | struct snd_soc_tplg_hdr           |  1  |
  * +-----------------------------------+-----+
@@ -480,8 +514,16 @@ struct snd_soc_tplg_pcm {
 struct snd_soc_tplg_link_config {
 	__le32 size;            /* in bytes of this structure */
 	__le32 id;              /* unique ID - used to match */
+	char name[SNDRV_CTL_ELEM_ID_NAME_MAXLEN]; /* name - used to match */
+	char stream_name[SNDRV_CTL_ELEM_ID_NAME_MAXLEN]; /* stream name - used to match */
 	struct snd_soc_tplg_stream stream[SND_SOC_TPLG_STREAM_CONFIG_MAX]; /* supported configs playback and captrure */
 	__le32 num_streams;     /* number of streams */
+	struct snd_soc_tplg_hw_config hw_config[SND_SOC_TPLG_HW_CONFIG_MAX]; /* hw configs */
+	__le32 num_hw_configs;         /* number of hw configs */
+	__le32 default_hw_config_id;   /* default hw config ID for init */
+	__le32 flag_mask;       /* bitmask of flags to configure */
+	__le32 flags;           /* SND_SOC_TPLG_LNK_FLGBIT_* flag value */
+	struct snd_soc_tplg_private priv;
 } __attribute__((packed));
 
 /*
-- 
2.7.4