ASoC: SOF: ipc4: Configure the debug box offset

The debug window for IPC4 compatible firmware is always window #2,
set the debug_box.offset accordingly.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Link: https://lore.kernel.org/r/20220909114332.31393-5-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/ipc4-priv.h

@@ -15,6 +15,7 @@
 
 /* The DSP window indices are fixed */
 #define SOF_IPC4_OUTBOX_WINDOW_IDX	1
+#define SOF_IPC4_DEBUG_WINDOW_IDX	2
 
 /**
  * struct sof_ipc4_fw_data - IPC4-specific data

sound/soc/sof/ipc4.c

@@ -545,10 +545,14 @@ static int ipc4_fw_ready(struct snd_sof_dev *sdev, struct sof_ipc4_msg *ipc4_msg
 	sdev->host_box.offset = outbox_offset;
 	sdev->host_box.size = outbox_size;
 
+	sdev->debug_box.offset = snd_sof_dsp_get_window_offset(sdev,
+							SOF_IPC4_DEBUG_WINDOW_IDX);
+
 	dev_dbg(sdev->dev, "mailbox upstream 0x%x - size 0x%x\n",
 		inbox_offset, inbox_size);
 	dev_dbg(sdev->dev, "mailbox downstream 0x%x - size 0x%x\n",
 		outbox_offset, outbox_size);
+	dev_dbg(sdev->dev, "debug box 0x%x\n", sdev->debug_box.offset);
 
 	return sof_ipc4_init_msg_memory(sdev);
 }