linux-kernel - [PATCH V8 7/8] soundwire: amd: handle SoundWire wake enable interrupt

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Date:   Tue, 21 Mar 2023 10:39:00 +0530
From:   Vijendar Mukunda <Vijendar.Mukunda@....com>
To:     <vkoul@...nel.org>
CC:     <vinod.koul@...aro.org>, <alsa-devel@...a-project.org>,
        <pierre-louis.bossart@...ux.intel.com>,
        <Basavaraj.Hiregoudar@....com>, <Sunil-kumar.Dommati@....com>,
        <Mario.Limonciello@....com>, <amadeuszx.slawinski@...ux.intel.com>,
        <Mastan.Katragadda@....com>, <Arungopal.kondaveeti@....com>,
        <claudiu.beznea@...rochip.com>,
        "Vijendar Mukunda" <Vijendar.Mukunda@....com>,
        Bard Liao <yung-chuan.liao@...ux.intel.com>,
        Sanyog Kale <sanyog.r.kale@...el.com>,
        open list <linux-kernel@...r.kernel.org>
Subject: [PATCH V8 7/8] soundwire: amd: handle SoundWire wake enable interrupt

Add wake enable interrupt support for both the SoundWire manager
instances.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@....com>
Signed-off-by: Mastan Katragadda <Mastan.Katragadda@....com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Link: https://lore.kernel.org/lkml/20230227154801.50319-8-Vijendar.Mukunda@amd.com
---
 drivers/soundwire/amd_manager.c | 10 ++++++++++
 drivers/soundwire/amd_manager.h |  1 +
 2 files changed, 11 insertions(+)

diff --git a/drivers/soundwire/amd_manager.c b/drivers/soundwire/amd_manager.c
index 6172b3cb84d4..d55706e87d83 100644
--- a/drivers/soundwire/amd_manager.c
+++ b/drivers/soundwire/amd_manager.c
@@ -831,6 +831,13 @@ static void amd_sdw_update_slave_status(u32 status_change_0to7, u32 status_chang
 	}
 }
 
+static void amd_sdw_process_wake_event(struct amd_sdw_manager *amd_manager)
+{
+	pm_request_resume(amd_manager->dev);
+	writel(0x00, amd_manager->acp_mmio + ACP_SW_WAKE_EN(amd_manager->instance));
+	writel(0x00, amd_manager->mmio + ACP_SW_STATE_CHANGE_STATUS_8TO11);
+}
+
 static void amd_sdw_irq_thread(struct work_struct *work)
 {
 	struct amd_sdw_manager *amd_manager =
@@ -842,6 +849,9 @@ static void amd_sdw_irq_thread(struct work_struct *work)
 	status_change_0to7 = readl(amd_manager->mmio + ACP_SW_STATE_CHANGE_STATUS_0TO7);
 	dev_dbg(amd_manager->dev, "[SDW%d] SDW INT: 0to7=0x%x, 8to11=0x%x\n",
 		amd_manager->instance, status_change_0to7, status_change_8to11);
+	if (status_change_8to11 & AMD_SDW_WAKE_STAT_MASK)
+		return amd_sdw_process_wake_event(amd_manager);
+
 	if (status_change_8to11 & AMD_SDW_PREQ_INTR_STAT) {
 		amd_sdw_read_and_process_ping_status(amd_manager);
 	} else {
diff --git a/drivers/soundwire/amd_manager.h b/drivers/soundwire/amd_manager.h
index b101f4536230..5f040151a259 100644
--- a/drivers/soundwire/amd_manager.h
+++ b/drivers/soundwire/amd_manager.h
@@ -189,6 +189,7 @@
 #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)
 
 static u32 amd_sdw_freq_tbl[AMD_SDW_MAX_FREQ_NUM] = {
 	AMD_SDW_DEFAULT_CLK_FREQ,
-- 
2.34.1