linux-kernel - [PATCH 06/19] ASoC: amd: ps: add support for soundwire interrupts in acp pci driver

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Message-ID: <20230111090222.2016499-7-Vijendar.Mukunda@amd.com>
Date:   Wed, 11 Jan 2023 14:32:09 +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>,
        Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Syed Saba Kareem <Syed.SabaKareem@....com>,
        Nathan Chancellor <nathan@...nel.org>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        open list <linux-kernel@...r.kernel.org>
Subject: [PATCH 06/19] ASoC: amd: ps: add support for soundwire interrupts in acp pci driver

Handle soundwire controller related interrupts in ACP PCI driver irq
handler and schedule controller work queue for further processing.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@....com>
---
 sound/soc/amd/ps/acp63.h  |  4 ++++
 sound/soc/amd/ps/pci-ps.c | 40 ++++++++++++++++++++++++++++++++++-----
 2 files changed, 39 insertions(+), 5 deletions(-)

diff --git a/sound/soc/amd/ps/acp63.h b/sound/soc/amd/ps/acp63.h
index ed979e6d0c1d..0bd9dc363461 100644
--- a/sound/soc/amd/ps/acp63.h
+++ b/sound/soc/amd/ps/acp63.h
@@ -64,6 +64,10 @@
 #define ACP63_SDW_ADDR			5
 #define AMD_SDW_MAX_CONTROLLERS		2
 
+#define ACP_SDW0_IRQ_MASK	21
+#define ACP_SDW1_IRQ_MASK	2
+#define ACP_ERROR_IRQ_MASK      29
+
 enum acp_config {
 	ACP_CONFIG_0 = 0,
 	ACP_CONFIG_1,
diff --git a/sound/soc/amd/ps/pci-ps.c b/sound/soc/amd/ps/pci-ps.c
index 85154cf0b2a2..0fbe5e27f3fb 100644
--- a/sound/soc/amd/ps/pci-ps.c
+++ b/sound/soc/amd/ps/pci-ps.c
@@ -67,6 +67,7 @@ static int acp63_reset(void __iomem *acp_base)
 static void acp63_enable_interrupts(void __iomem *acp_base)
 {
 	acp63_writel(1, acp_base + ACP_EXTERNAL_INTR_ENB);
+	acp63_writel(BIT(ACP_ERROR_IRQ_MASK), acp_base + ACP_EXTERNAL_INTR_CNTL);
 }
 
 static void acp63_disable_interrupts(void __iomem *acp_base)
@@ -116,23 +117,52 @@ static irqreturn_t acp63_irq_handler(int irq, void *dev_id)
 {
 	struct acp63_dev_data *adata;
 	struct pdm_dev_data *ps_pdm_data;
-	u32 val;
+	struct amd_sdwc_ctrl *ctrl;
+	u32 ext_intr_stat, ext_intr_stat1;
+	u16 irq_flag = 0;
 	u16 pdev_index;
 
 	adata = dev_id;
 	if (!adata)
 		return IRQ_NONE;
+	ext_intr_stat = acp63_readl(adata->acp63_base + ACP_EXTERNAL_INTR_STAT);
+	if (ext_intr_stat & BIT(ACP_SDW0_IRQ_MASK)) {
+		pdev_index = adata->sdw0_dev_index;
+		ctrl = dev_get_drvdata(&adata->pdev[pdev_index]->dev);
+		acp63_writel(BIT(ACP_SDW0_IRQ_MASK), adata->acp63_base + ACP_EXTERNAL_INTR_STAT);
+		schedule_work(&ctrl->amd_sdw_irq_thread);
+		irq_flag = 1;
+	}
 
-	val = acp63_readl(adata->acp63_base + ACP_EXTERNAL_INTR_STAT);
-	if (val & BIT(PDM_DMA_STAT)) {
+	ext_intr_stat1 = acp63_readl(adata->acp63_base + ACP_EXTERNAL_INTR_STAT1);
+	if (ext_intr_stat1 & BIT(ACP_SDW1_IRQ_MASK)) {
+		pdev_index = adata->sdw1_dev_index;
+		ctrl = dev_get_drvdata(&adata->pdev[pdev_index]->dev);
+		acp63_writel(BIT(ACP_SDW1_IRQ_MASK), adata->acp63_base + ACP_EXTERNAL_INTR_STAT1);
+		schedule_work(&ctrl->amd_sdw_irq_thread);
+		irq_flag = 1;
+	}
+
+	if (ext_intr_stat & BIT(ACP_ERROR_IRQ_MASK)) {
+		acp63_writel(BIT(ACP_ERROR_IRQ_MASK), adata->acp63_base + ACP_EXTERNAL_INTR_STAT);
+		acp63_writel(0, adata->acp63_base + ACP_SW_I2S_ERROR_REASON);
+		acp63_writel(0, adata->acp63_base + ACP_P1_SW_I2S_ERROR_REASON);
+		acp63_writel(0, adata->acp63_base + ACP_ERROR_STATUS);
+		irq_flag = 1;
+	}
+
+	if (ext_intr_stat & BIT(PDM_DMA_STAT)) {
 		pdev_index = adata->pdm_dev_index;
 		ps_pdm_data = dev_get_drvdata(&adata->pdev[pdev_index]->dev);
 		acp63_writel(BIT(PDM_DMA_STAT), adata->acp63_base + ACP_EXTERNAL_INTR_STAT);
 		if (ps_pdm_data->capture_stream)
 			snd_pcm_period_elapsed(ps_pdm_data->capture_stream);
-		return IRQ_HANDLED;
+		irq_flag = 1;
 	}
-	return IRQ_NONE;
+	if (irq_flag)
+		return IRQ_HANDLED;
+	else
+		return IRQ_NONE;
 }
 
 static int sdw_amd_scan_controller(struct device *dev)
-- 
2.34.1