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ASoC: SDCA: Add support for clock Entity properties

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

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.dev>
Link: https://patch.msgid.link/20250205113801.3699902-10-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Charles Keepax
2025-02-05 11:38:00 +00:00
committed by Mark Brown
parent 5c93b20f6d
commit e80b8e5c53
2 changed files with 55 additions and 0 deletions
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25
include/sound/sdca_function.h
View File

@@ -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;
};
};

30
sound/soc/sdca/sdca_functions.c
View File

@@ -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;
}