Unverified Commit aff9d088 authored by Vijendar Mukunda's avatar Vijendar Mukunda Committed by Mark Brown
Browse files

soundwire: amd: implement function to extract slave information 



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: default avatarVijendar Mukunda <Vijendar.Mukunda@amd.com>
Acked-by: default avatarVinod Koul <vkoul@kernel.org>
Link: https://msgid.link/r/20240129055147.1493853-5-Vijendar.Mukunda@amd.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent ed5e8741

drivers/soundwire/amd_init.c

+43 −0
Original line number Diff line number Diff line
@@ -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");

include/linux/soundwire/sdw_amd.h

+2 −0
Original line number Diff line number Diff line
@@ -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