Commit f40bb244 authored by Pierre-Louis Bossart's avatar Pierre-Louis Bossart Committed by Vinod Koul
Browse files

soundwire: intel_ace2x: configure link PHY 



Unlike previous hardware generations, the glue-to-master transition is
not managed by software, instead the transitions are managed as part
of the power-up/down sequences controlled by SPA/CPA bits.

The only thing that's required is to configure the link PHY for
'normal' operation instead of the PHY test mode.

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/20230515071042.2038-14-yung-chuan.liao@linux.intel.com


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent d3565643

drivers/soundwire/intel_ace2x.c

+19 −0
Original line number Diff line number Diff line
@@ -15,6 +15,22 @@ 
#include "bus.h"

#include "intel.h"



/*

 * shim vendor-specific (vs) ops

 */



static void intel_shim_vs_init(struct sdw_intel *sdw)

{

	void __iomem *shim_vs = sdw->link_res->shim_vs;

	u16 act = 0;



	u16p_replace_bits(&act, 0x1, SDW_SHIM2_INTEL_VS_ACTMCTL_DOAIS);

	act |= SDW_SHIM2_INTEL_VS_ACTMCTL_DACTQE;

	act |=  SDW_SHIM2_INTEL_VS_ACTMCTL_DODS;

	intel_writew(shim_vs, SDW_SHIM2_INTEL_VS_ACTMCTL, act);

	usleep_range(10, 15);

}



static int intel_link_power_up(struct sdw_intel *sdw)

{

	struct sdw_bus *bus = &sdw->cdns.bus;
@@ -63,6 +79,9 @@ static int intel_link_power_up(struct sdw_intel *sdw) 
	*shim_mask |= BIT(link_id);



	sdw->cdns.link_up = true;



	intel_shim_vs_init(sdw);



out:

	mutex_unlock(sdw->link_res->shim_lock);