linux-kernel - [PATCH 16/19] soundwire: amd: handle wake enable interrupt

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Date:   Wed, 11 Jan 2023 14:32:19 +0530
From:   Vijendar Mukunda <Vijendar.Mukunda@....com>
To:     <broonie@...nel.org>, <vkoul@...nel.org>,
        <alsa-devel@...a-project.org>
CC:     <Basavaraj.Hiregoudar@....com>, <Sunil-kumar.Dommati@....com>,
        <Mario.Limonciello@....com>, <Mastan.Katragadda@....com>,
        <arungopal.kondaveeti@....com>,
        Vijendar Mukunda <Vijendar.Mukunda@....com>,
        Bard Liao <yung-chuan.liao@...ux.intel.com>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Sanyog Kale <sanyog.r.kale@...el.com>,
        open list <linux-kernel@...r.kernel.org>
Subject: [PATCH 16/19] soundwire: amd: handle wake enable interrupt

Add wake enable interrupt support for both the soundwire controller
instances.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@....com>
Signed-off-by: Mastan Katragadda <Mastan.Katragadda@....com>
---
 drivers/soundwire/amd_master.c    | 9 +++++++++
 drivers/soundwire/amd_master.h    | 1 +
 include/linux/soundwire/sdw_amd.h | 1 +
 3 files changed, 11 insertions(+)

diff --git a/drivers/soundwire/amd_master.c b/drivers/soundwire/amd_master.c
index 290c59ab7760..2fd77a673c22 100644
--- a/drivers/soundwire/amd_master.c
+++ b/drivers/soundwire/amd_master.c
@@ -1219,6 +1219,13 @@ static void amd_sdwc_update_slave_status_work(struct work_struct *work)
 	u32 sw_status_change_mask_0to7_reg;
 	u32 sw_status_change_mask_8to11_reg;
 
+	if (ctrl->wake_event) {
+		pm_runtime_resume(ctrl->dev);
+		acp_reg_writel(0x00, ctrl->mmio + ACP_SW_WAKE_EN);
+		ctrl->wake_event = false;
+		return;
+	}
+
 	switch (ctrl->instance) {
 	case ACP_SDW0:
 		sw_status_change_mask_0to7_reg = SW_STATE_CHANGE_STATUS_MASK_0TO7;
@@ -1258,6 +1265,8 @@ static void amd_sdwc_update_slave_status(u32 status_change_0to7, u32 status_chan
 
 	if (status_change_0to7 == AMD_SDW_SLAVE_0_ATTACHED)
 		memset(ctrl->status, 0, sizeof(ctrl->status));
+	if (status_change_8to11 & AMD_SDW_WAKE_STAT_MASK)
+		ctrl->wake_event = true;
 	slave_stat = status_change_0to7;
 	slave_stat |= FIELD_GET(AMD_SDW_MCP_SLAVE_STATUS_8TO_11, status_change_8to11) << 32;
 	dev_dbg(ctrl->dev, "%s: status_change_0to7:0x%x status_change_8to11:0x%x\n",
diff --git a/drivers/soundwire/amd_master.h b/drivers/soundwire/amd_master.h
index cc254255512b..e32884e3a45b 100644
--- a/drivers/soundwire/amd_master.h
+++ b/drivers/soundwire/amd_master.h
@@ -240,6 +240,7 @@
 #define AMD_SDW_CLK_STOP_DONE		1
 #define AMD_SDW_CLK_RESUME_REQ		2
 #define AMD_SDW_CLK_RESUME_DONE		3
+#define AMD_SDW_WAKE_STAT_MASK		BIT(16)
 
 enum amd_sdw_channel {
 	/* SDW0 */
diff --git a/include/linux/soundwire/sdw_amd.h b/include/linux/soundwire/sdw_amd.h
index f362f195b887..e3e539b868be 100644
--- a/include/linux/soundwire/sdw_amd.h
+++ b/include/linux/soundwire/sdw_amd.h
@@ -40,6 +40,7 @@ struct amd_sdwc_ctrl {
 	int num_ports;
 	bool clk_stopped;
 	bool startup_done;
+	bool wake_event;
 	u32 power_mode_mask;
 };
 
-- 
2.34.1