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soundwire: amd: implement function to extract slave information

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Implement function to extract slaves information connected on the bus.
This information is required during machine select logic.
This function will be called from machine select logic code.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Acked-by: Vinod Koul <vkoul@kernel.org>
Link: https://msgid.link/r/20240129055147.1493853-5-Vijendar.Mukunda@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Vijendar Mukunda 2024-01-29 11:21:38 +05:30 committed by Mark Brown
parent ed5e8741b8
commit aff9d088a3
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
2 changed files with 45 additions and 0 deletions
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43
drivers/soundwire/amd_init.c
View File

@ -142,6 +142,49 @@ void sdw_amd_exit(struct sdw_amd_ctx *ctx)
}
EXPORT_SYMBOL_NS(sdw_amd_exit, SOUNDWIRE_AMD_INIT);
int sdw_amd_get_slave_info(struct sdw_amd_ctx *ctx)
{
struct amd_sdw_manager *amd_manager;
struct sdw_bus *bus;
struct sdw_slave *slave;
struct list_head *node;
int index;
int i = 0;
int num_slaves = 0;
for (index = 0; index < ctx->count; index++) {
if (!(ctx->link_mask & BIT(index)))
continue;
amd_manager = dev_get_drvdata(&ctx->pdev[index]->dev);
if (!amd_manager)
return -ENODEV;
bus = &amd_manager->bus;
/* Calculate number of slaves */
list_for_each(node, &bus->slaves)
num_slaves++;
}
ctx->ids = kcalloc(num_slaves, sizeof(*ctx->ids), GFP_KERNEL);
if (!ctx->ids)
return -ENOMEM;
ctx->num_slaves = num_slaves;
for (index = 0; index < ctx->count; index++) {
if (!(ctx->link_mask & BIT(index)))
continue;
amd_manager = dev_get_drvdata(&ctx->pdev[index]->dev);
if (amd_manager) {
bus = &amd_manager->bus;
list_for_each_entry(slave, &bus->slaves, node) {
ctx->ids[i].id = slave->id;
ctx->ids[i].link_id = bus->link_id;
i++;
}
}
}
return 0;
}
EXPORT_SYMBOL_NS(sdw_amd_get_slave_info, SOUNDWIRE_AMD_INIT);
MODULE_AUTHOR("Vijendar.Mukunda@amd.com");
MODULE_DESCRIPTION("AMD SoundWire Init Library");
MODULE_LICENSE("Dual BSD/GPL");

2
include/linux/soundwire/sdw_amd.h
View File

@ -170,5 +170,7 @@ int sdw_amd_probe(struct sdw_amd_res *res, struct sdw_amd_ctx **ctx);
void sdw_amd_exit(struct sdw_amd_ctx *ctx);
int sdw_amd_get_slave_info(struct sdw_amd_ctx *ctx);
int amd_sdw_scan_controller(struct sdw_amd_acpi_info *info);
#endif