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soundwire: intel: pass link_mask information to each master 

While the hardware exposes independent bits to power-up each master,
the recommended sequence is to power all links or none. Idle links can
still use the clock stop mode while the master is powered.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20200901150556.19432-10-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
zero-sugar-mainline-defconfig
Pierre-Louis Bossart 2020-09-01 23:05:55 +08:00 committed by Vinod Koul
parent f748f34ef9
commit de763fa888
2 changed files with 3 additions and 0 deletions
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2
drivers/soundwire/intel.h
View File

@ -18,6 +18,7 @@
* @shim_lock: mutex to handle access to shared SHIM registers
* @shim_mask: global pointer to check SHIM register initialization
* @clock_stop_quirks: mask defining requested behavior on pm_suspend
* @link_mask: global mask needed for power-up/down sequences
* @cdns: Cadence master descriptor
* @list: used to walk-through all masters exposed by the same controller
*/
@ -33,6 +34,7 @@ struct sdw_intel_link_res {
struct mutex *shim_lock; /* protect shared registers */
u32 *shim_mask;
u32 clock_stop_quirks;
u32 link_mask;
struct sdw_cdns *cdns;
struct list_head list;
};

1
drivers/soundwire/intel_init.c
View File

@ -255,6 +255,7 @@ static struct sdw_intel_ctx
link->clock_stop_quirks = res->clock_stop_quirks;
link->shim_lock = &ctx->shim_lock;
link->shim_mask = &ctx->shim_mask;
link->link_mask = link_mask;
memset(&pdevinfo, 0, sizeof(pdevinfo));