Commit 806f5abd authored by Pierre-Louis Bossart's avatar Pierre-Louis Bossart Committed by Vinod Koul
Browse files

soundwire: intel_ace2x: add link power-up/down helpers 



only power-up/down for now, the frequency is not set.

Signed-off-by: default avatarPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: default avatarRander Wang <rander.wang@intel.com>
Reviewed-by: default avatarPéter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: default avatarRanjani Sridharan <ranjani.sridharan@linux.intel.com>
Signed-off-by: default avatarBard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20230515071042.2038-12-yung-chuan.liao@linux.intel.com


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent 312316d5

drivers/soundwire/intel_ace2x.c

+50 −0
Original line number Diff line number Diff line
@@ -10,12 +10,62 @@ 
#include <linux/soundwire/sdw_registers.h>

#include <linux/soundwire/sdw.h>

#include <linux/soundwire/sdw_intel.h>

#include <sound/hda-mlink.h>

#include "cadence_master.h"

#include "bus.h"

#include "intel.h"



static int intel_link_power_up(struct sdw_intel *sdw)

{

	int ret;



	mutex_lock(sdw->link_res->shim_lock);



	ret = hdac_bus_eml_sdw_power_up_unlocked(sdw->link_res->hbus, sdw->instance);

	if (ret < 0) {

		dev_err(sdw->cdns.dev, "%s: hdac_bus_eml_sdw_power_up failed: %d\n",

			__func__, ret);

		goto out;

	}



	sdw->cdns.link_up = true;

out:

	mutex_unlock(sdw->link_res->shim_lock);



	return ret;

}



static int intel_link_power_down(struct sdw_intel *sdw)

{

	int ret;



	mutex_lock(sdw->link_res->shim_lock);



	sdw->cdns.link_up = false;



	ret = hdac_bus_eml_sdw_power_down_unlocked(sdw->link_res->hbus, sdw->instance);

	if (ret < 0) {

		dev_err(sdw->cdns.dev, "%s: hdac_bus_eml_sdw_power_down failed: %d\n",

			__func__, ret);



		/*

		 * we leave the sdw->cdns.link_up flag as false since we've disabled

		 * the link at this point and cannot handle interrupts any longer.

		 */

	}



	mutex_unlock(sdw->link_res->shim_lock);



	return ret;

}



const struct sdw_intel_hw_ops sdw_intel_lnl_hw_ops = {

	.debugfs_init = intel_ace2x_debugfs_init,

	.debugfs_exit = intel_ace2x_debugfs_exit,



	.link_power_up = intel_link_power_up,

	.link_power_down = intel_link_power_down,

};

EXPORT_SYMBOL_NS(sdw_intel_lnl_hw_ops, SOUNDWIRE_INTEL);



MODULE_IMPORT_NS(SND_SOC_SOF_HDA_MLINK);