soundwire: intel: add link power management callbacks in hw_ops

No functionality change, only add indirection for link power
management helpers.

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/20221111013135.38289-6-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

drivers/soundwire/intel.c

@@ -1434,6 +1434,9 @@ const struct sdw_intel_hw_ops sdw_intel_cnl_hw_ops = {
 	.start_bus_after_clock_stop = intel_start_bus_after_clock_stop,
 	.stop_bus = intel_stop_bus,
 
+	.link_power_up = intel_link_power_up,
+	.link_power_down = intel_link_power_down,
+
 	.pre_bank_switch = intel_pre_bank_switch,
 	.post_bank_switch = intel_post_bank_switch,
 };
@@ -1614,7 +1617,7 @@ int intel_link_startup(struct auxiliary_device *auxdev)
 	bus->multi_link = multi_link;
 
 	/* Initialize shim, controller */
-	ret = intel_link_power_up(sdw);
+	ret = sdw_intel_link_power_up(sdw);
 	if (ret)
 		goto err_init;
 
@@ -1679,7 +1682,7 @@ int intel_link_startup(struct auxiliary_device *auxdev)
 	return 0;
 
 err_power_up:
-	intel_link_power_down(sdw);
+	sdw_intel_link_power_down(sdw);
 err_init:
 	return ret;
 }
@@ -1935,7 +1938,7 @@ static int __maybe_unused intel_resume(struct device *dev)
 			pm_runtime_idle(dev);
 	}
 
-	ret = intel_link_power_up(sdw);
+	ret = sdw_intel_link_power_up(sdw);
 	if (ret) {
 		dev_err(dev, "%s failed: %d\n", __func__, ret);
 		return ret;
@@ -1950,7 +1953,7 @@ static int __maybe_unused intel_resume(struct device *dev)
 	ret = sdw_intel_start_bus(sdw);
 	if (ret < 0) {
 		dev_err(dev, "cannot start bus during resume\n");
-		intel_link_power_down(sdw);
+		sdw_intel_link_power_down(sdw);
 		return ret;
 	}
 
@@ -1989,7 +1992,7 @@ static int __maybe_unused intel_resume_runtime(struct device *dev)
 	clock_stop_quirks = sdw->link_res->clock_stop_quirks;
 
 	if (clock_stop_quirks & SDW_INTEL_CLK_STOP_TEARDOWN) {
-		ret = intel_link_power_up(sdw);
+		ret = sdw_intel_link_power_up(sdw);
 		if (ret) {
 			dev_err(dev, "%s: power_up failed after teardown: %d\n", __func__, ret);
 			return ret;
@@ -2004,13 +2007,13 @@ static int __maybe_unused intel_resume_runtime(struct device *dev)
 		ret = sdw_intel_start_bus(sdw);
 		if (ret < 0) {
 			dev_err(dev, "%s: cannot start bus after teardown: %d\n", __func__, ret);
-			intel_link_power_down(sdw);
+			sdw_intel_link_power_down(sdw);
 			return ret;
 		}
 
 
 	} else if (clock_stop_quirks & SDW_INTEL_CLK_STOP_BUS_RESET) {
-		ret = intel_link_power_up(sdw);
+		ret = sdw_intel_link_power_up(sdw);
 		if (ret) {
 			dev_err(dev, "%s: power_up failed after bus reset: %d\n", __func__, ret);
 			return ret;
@@ -2019,14 +2022,14 @@ static int __maybe_unused intel_resume_runtime(struct device *dev)
 		ret = sdw_intel_start_bus_after_reset(sdw);
 		if (ret < 0) {
 			dev_err(dev, "%s: cannot start bus after reset: %d\n", __func__, ret);
-			intel_link_power_down(sdw);
+			sdw_intel_link_power_down(sdw);
 			return ret;
 		}
 	} else if (!clock_stop_quirks) {
 
 		sdw_intel_check_clock_stop(sdw);
 
-		ret = intel_link_power_up(sdw);
+		ret = sdw_intel_link_power_up(sdw);
 		if (ret) {
 			dev_err(dev, "%s: power_up failed: %d\n", __func__, ret);
 			return ret;
@@ -2035,7 +2038,7 @@ static int __maybe_unused intel_resume_runtime(struct device *dev)
 		ret = sdw_intel_start_bus_after_clock_stop(sdw);
 		if (ret < 0) {
 			dev_err(dev, "%s: cannot start bus after clock stop: %d\n", __func__, ret);
-			intel_link_power_down(sdw);
+			sdw_intel_link_power_down(sdw);
 			return ret;
 		}
 	} else {

drivers/soundwire/intel.h

@@ -118,4 +118,18 @@ static inline int sdw_intel_stop_bus(struct sdw_intel *sdw, bool clock_stop)
 	return -ENOTSUPP;
 }
 
+static inline int sdw_intel_link_power_up(struct sdw_intel *sdw)
+{
+	if (SDW_INTEL_CHECK_OPS(sdw, link_power_up))
+		return SDW_INTEL_OPS(sdw, link_power_up)(sdw);
+	return -ENOTSUPP;
+}
+
+static inline int sdw_intel_link_power_down(struct sdw_intel *sdw)
+{
+	if (SDW_INTEL_CHECK_OPS(sdw, link_power_down))
+		return SDW_INTEL_OPS(sdw, link_power_down)(sdw);
+	return -ENOTSUPP;
+}
+
 #endif /* __SDW_INTEL_LOCAL_H */

include/linux/soundwire/sdw_intel.h

@@ -305,6 +305,8 @@ struct sdw_intel;
  * @start_bus_after_reset: start after reset
  * @start_bus_after_clock_stop: start after mode0 clock stop
  * @stop_bus: stop all bus
+ * @link_power_up: power-up using chip-specific helpers
+ * @link_power_down: power-down with chip-specific helpers
  * @pre_bank_switch: helper for bus management
  * @post_bank_switch: helper for bus management
  */
@@ -320,6 +322,9 @@ struct sdw_intel_hw_ops {
 	int (*start_bus_after_clock_stop)(struct sdw_intel *sdw);
 	int (*stop_bus)(struct sdw_intel *sdw, bool clock_stop);
 
+	int (*link_power_up)(struct sdw_intel *sdw);
+	int (*link_power_down)(struct sdw_intel *sdw);
+
 	int (*pre_bank_switch)(struct sdw_intel *sdw);
 	int (*post_bank_switch)(struct sdw_intel *sdw);
 };