linux-kernel - [PATCH v2 15/26] soundwire: intel_ace2x: add sync_arm/sync

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Message-Id: <20230515071042.2038-16-yung-chuan.liao@linux.intel.com>
Date:   Mon, 15 May 2023 15:10:31 +0800
From:   Bard Liao <yung-chuan.liao@...ux.intel.com>
To:     alsa-devel@...a-project.org, vkoul@...nel.org, broonie@...nel.org,
        tiwai@...e.de
Cc:     linux-kernel@...r.kernel.org, vinod.koul@...aro.org,
        pierre-louis.bossart@...ux.intel.com, bard.liao@...el.com
Subject: [PATCH v2 15/26] soundwire: intel_ace2x: add sync_arm/sync_go helpers

From: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>

Same functionality as before, but with the registers moved to the
HDaudio multi-link area.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Reviewed-by: Rander Wang <rander.wang@...el.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@...ux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@...ux.intel.com>
---
 drivers/soundwire/intel_ace2x.c | 39 +++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)

diff --git a/drivers/soundwire/intel_ace2x.c b/drivers/soundwire/intel_ace2x.c
index d6d5e6e070f4..20b8806f7de6 100644
--- a/drivers/soundwire/intel_ace2x.c
+++ b/drivers/soundwire/intel_ace2x.c
@@ -116,6 +116,41 @@ static int intel_link_power_down(struct sdw_intel *sdw)
 	return ret;
 }
 
+static void intel_sync_arm(struct sdw_intel *sdw)
+{
+	unsigned int link_id = sdw->instance;
+
+	mutex_lock(sdw->link_res->shim_lock);
+
+	hdac_bus_eml_sdw_sync_arm_unlocked(sdw->link_res->hbus, link_id);
+
+	mutex_unlock(sdw->link_res->shim_lock);
+}
+
+static int intel_sync_go_unlocked(struct sdw_intel *sdw)
+{
+	int ret;
+
+	ret = hdac_bus_eml_sdw_sync_go_unlocked(sdw->link_res->hbus);
+	if (ret < 0)
+		dev_err(sdw->cdns.dev, "%s: SyncGO clear failed: %d\n", __func__, ret);
+
+	return ret;
+}
+
+static int intel_sync_go(struct sdw_intel *sdw)
+{
+	int ret;
+
+	mutex_lock(sdw->link_res->shim_lock);
+
+	ret = intel_sync_go_unlocked(sdw);
+
+	mutex_unlock(sdw->link_res->shim_lock);
+
+	return ret;
+}
+
 /*
  * DAI operations
  */
@@ -283,6 +318,10 @@ const struct sdw_intel_hw_ops sdw_intel_lnl_hw_ops = {
 
 	.link_power_up = intel_link_power_up,
 	.link_power_down = intel_link_power_down,
+
+	.sync_arm = intel_sync_arm,
+	.sync_go_unlocked = intel_sync_go_unlocked,
+	.sync_go = intel_sync_go,
 };
 EXPORT_SYMBOL_NS(sdw_intel_lnl_hw_ops, SOUNDWIRE_INTEL);
 
-- 
2.25.1