soundwire: intel_ace2x: move and extend clock selection

The input clock to the SoundWire IP can be
38.4 MHz (xtal clock source)
24.576 MHz (audio cardinal clock)
96 MHz (internal Audio PLL)

This patch moves the clock selection outside the mutex and add the new
choices for 24.576 and 96 MHz, but doesn't add any functionality.
Follow-up patches will add support for clock selection.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20240326092030.1062802-6-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/soundwire/intel_ace2x.c b/drivers/soundwire/intel_ace2x.c
index 8280baa3254b0ba93cb8a80dc14f29fb0af3b375..abdd651a185c280131ef26965a00ff4ba6a49332 100644 (file)
--- a/drivers/soundwire/intel_ace2x.c
+++ b/drivers/soundwire/intel_ace2x.c
@@ -74,20 +74,29 @@ static int intel_link_power_up(struct sdw_intel *sdw)
        struct sdw_master_prop *prop = &bus->prop;
        u32 *shim_mask = sdw->link_res->shim_mask;
        unsigned int link_id = sdw->instance;
+       u32 clock_source;
        u32 syncprd;
        int ret;
 
+       if (prop->mclk_freq % 6000000) {
+               if (prop->mclk_freq % 2400000) {
+                       syncprd = SDW_SHIM_SYNC_SYNCPRD_VAL_24_576;
+                       clock_source = SDW_SHIM2_MLCS_CARDINAL_CLK;
+               } else {
+                       syncprd = SDW_SHIM_SYNC_SYNCPRD_VAL_38_4;
+                       clock_source = SDW_SHIM2_MLCS_XTAL_CLK;
+               }
+       } else {
+               syncprd = SDW_SHIM_SYNC_SYNCPRD_VAL_96;
+               clock_source = SDW_SHIM2_MLCS_AUDIO_PLL_CLK;
+       }
+
        mutex_lock(sdw->link_res->shim_lock);
 
        if (!*shim_mask) {
                /* we first need to program the SyncPRD/CPU registers */
                dev_dbg(sdw->cdns.dev, "first link up, programming SYNCPRD\n");
 
-               if (prop->mclk_freq % 6000000)
-                       syncprd = SDW_SHIM_SYNC_SYNCPRD_VAL_38_4;
-               else
-                       syncprd = SDW_SHIM_SYNC_SYNCPRD_VAL_24;
-
                ret =  hdac_bus_eml_sdw_set_syncprd_unlocked(sdw->link_res->hbus, syncprd);
                if (ret < 0) {
                        dev_err(sdw->cdns.dev, "%s: hdac_bus_eml_sdw_set_syncprd failed: %d\n",