Unverified Commit e80b8e5c authored by Charles Keepax's avatar Charles Keepax Committed by Mark Brown
Browse files

ASoC: SDCA: Add support for clock Entity properties 



Add support for parsing the Clock Source Entity properties from
DisCo/ACPI.

Signed-off-by: default avatarCharles Keepax <ckeepax@opensource.cirrus.com>
Reviewed-by: default avatarPierre-Louis Bossart <pierre-louis.bossart@linux.dev>
Link: https://patch.msgid.link/20250205113801.3699902-10-ckeepax@opensource.cirrus.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 5c93b20f

include/sound/sdca_function.h

+25 −0
Original line number Diff line number Diff line
@@ -784,6 +784,29 @@ struct sdca_entity_iot { 
	bool is_dataport;

};



/**

 * enum sdca_clock_type - SDCA Clock Types

 *

 * Indicate the synchronicity of an Clock Entity, see section 6.4.1.3

 * of the SDCA v1.0 specification.

 */

enum sdca_clock_type {

	SDCA_CLOCK_TYPE_EXTERNAL			= 0x00,

	SDCA_CLOCK_TYPE_INTERNAL_ASYNC			= 0x01,

	SDCA_CLOCK_TYPE_INTERNAL_SYNC			= 0x02,

	SDCA_CLOCK_TYPE_INTERNAL_SOURCE_SYNC		= 0x03,

};



/**

 * struct sdca_entity_cs - information specific to Clock Source Entities

 * @type: Synchronicity of the Clock Source.

 * @max_delay: The maximum delay in microseconds before the clock is stable.

 */

struct sdca_entity_cs {

	enum sdca_clock_type type;

	unsigned int max_delay;

};



/**

 * enum sdca_entity_type - SDCA Entity Type codes

 * @SDCA_ENTITY_TYPE_ENTITY_0: Entity 0, not actually from the
@@ -846,6 +869,7 @@ enum sdca_entity_type { 
 * @num_sources: Number of sources for the Entity.

 * @num_controls: Number of Controls for the Entity.

 * @iot: Input/Output Terminal specific Entity properties.

 * @cs: Clock Source specific Entity properties.

 */

struct sdca_entity {

	const char *label;
@@ -858,6 +882,7 @@ struct sdca_entity { 
	int num_controls;

	union {

		struct sdca_entity_iot iot;

		struct sdca_entity_cs cs;

	};

};

sound/soc/sdca/sdca_functions.c

+30 −0
Original line number Diff line number Diff line
@@ -881,6 +881,33 @@ static int find_sdca_entity_iot(struct device *dev, 
	return 0;

}



static int find_sdca_entity_cs(struct device *dev,

			       struct fwnode_handle *entity_node,

			       struct sdca_entity *entity)

{

	struct sdca_entity_cs *clock = &entity->cs;

	u32 tmp;

	int ret;



	ret = fwnode_property_read_u32(entity_node, "mipi-sdca-cs-type", &tmp);

	if (ret) {

		dev_err(dev, "%s: clock type missing: %d\n", entity->label, ret);

		return ret;

	}



	clock->type = tmp;



	ret = fwnode_property_read_u32(entity_node,

				       "mipi-sdca-clock-valid-max-delay", &tmp);

	if (!ret)

		clock->max_delay = tmp;



	dev_info(dev, "%s: clock type %#x delay %d\n", entity->label,

		 clock->type, clock->max_delay);



	return 0;

}



static int find_sdca_entity(struct device *dev,

			    struct fwnode_handle *function_node,

			    struct fwnode_handle *entity_node,
@@ -913,6 +940,9 @@ static int find_sdca_entity(struct device *dev, 
	case SDCA_ENTITY_TYPE_OT:

		ret = find_sdca_entity_iot(dev, entity_node, entity);

		break;

	case SDCA_ENTITY_TYPE_CS:

		ret = find_sdca_entity_cs(dev, entity_node, entity);

		break;

	default:

		break;

	}