Asoc: SOF: Intel: hda: check SoundWire wakeen interrupt in irq thread

If pci device is in D0, wakeen interrupt will be
aggregated at cAVS level as interrupt. This commit
check the wakeen status and process it in irq thread

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Rander Wang <rander.wang@intel.com>
Link: https://lore.kernel.org/r/20200325215027.28716-11-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/intel/hda.c

@@ -241,6 +241,19 @@ static irqreturn_t hda_dsp_sdw_thread(int irq, void *context)
 	return sdw_intel_thread(irq, context);
 }
 
+static bool hda_sdw_check_wakeen_irq(struct snd_sof_dev *sdev)
+{
+	struct sof_intel_hda_dev *hdev;
+
+	hdev = sdev->pdata->hw_pdata;
+	if (hdev->sdw &&
+	    snd_sof_dsp_read(sdev, HDA_DSP_BAR,
+			     HDA_DSP_REG_SNDW_WAKE_STS))
+		return true;
+
+	return false;
+}
+
 void hda_sdw_process_wakeen(struct snd_sof_dev *sdev)
 {
 	struct sof_intel_hda_dev *hdev;
@@ -684,6 +697,9 @@ static irqreturn_t hda_dsp_interrupt_thread(int irq, void *context)
 	if (hda_dsp_check_sdw_irq(sdev))
 		hda_dsp_sdw_thread(irq, hdev->sdw);
 
+	if (hda_sdw_check_wakeen_irq(sdev))
+		hda_sdw_process_wakeen(sdev);
+
 	/* enable GIE interrupt */
 	snd_sof_dsp_update_bits(sdev, HDA_DSP_HDA_BAR,
 				SOF_HDA_INTCTL,

sound/soc/sof/intel/hda.h

@@ -233,6 +233,7 @@
 #define HDA_DSP_REG_ADSPIS2		(HDA_DSP_GEN_BASE + 0x14)
 
 #define HDA_DSP_REG_ADSPIS2_SNDW	BIT(5)
+#define HDA_DSP_REG_SNDW_WAKE_STS      0x2C192
 
 /* Intel HD Audio Inter-Processor Communication Registers */
 #define HDA_DSP_IPC_BASE		0x40
@@ -709,6 +710,11 @@ static inline irqreturn_t hda_dsp_sdw_thread(int irq, void *context)
 	return IRQ_HANDLED;
 }
 
+static inline bool hda_sdw_check_wakeen_irq(struct snd_sof_dev *sdev)
+{
+	return false;
+}
+
 static inline void hda_sdw_process_wakeen(struct snd_sof_dev *sdev)
 {
 }