ASoC: SOF: amd: add module parameter for firmware debug

Add module parameter for firmware debug. If firmware debug
flag is enabled, clear the fusion stall bit which is required
for enabling firmware debugging through JTAG.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Link: https://lore.kernel.org/r/20230823073340.2829821-3-Vijendar.Mukunda@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: vijendarmukunda

sound/soc/sof/amd/acp-loader.c

@@ -207,6 +207,7 @@ EXPORT_SYMBOL_NS(acp_dsp_pre_fw_run, SND_SOC_SOF_AMD_COMMON);
 
 int acp_sof_dsp_run(struct snd_sof_dev *sdev)
 {
+	struct acp_dev_data *adata = sdev->pdata->hw_pdata;
 	const struct sof_amd_acp_desc *desc = get_chip_info(sdev->pdata);
 	int val;
 
@@ -215,7 +216,7 @@ int acp_sof_dsp_run(struct snd_sof_dev *sdev)
 	dev_dbg(sdev->dev, "ACP_DSP0_RUNSTALL : 0x%0x\n", val);
 
 	/* Some platforms won't support fusion DSP,keep offset zero for no support */
-	if (desc->fusion_dsp_offset) {
+	if (desc->fusion_dsp_offset && adata->enable_fw_debug) {
 		snd_sof_dsp_write(sdev, ACP_DSP_BAR, desc->fusion_dsp_offset, ACP_DSP_RUN);
 		val = snd_sof_dsp_read(sdev, ACP_DSP_BAR, desc->fusion_dsp_offset);
 		dev_dbg(sdev->dev, "ACP_DSP0_FUSION_RUNSTALL : 0x%0x\n", val);

sound/soc/sof/amd/acp.c

@@ -22,6 +22,10 @@
 
 #define SECURED_FIRMWARE 1
 
+static bool enable_fw_debug;
+module_param(enable_fw_debug, bool, 0444);
+MODULE_PARM_DESC(enable_fw_debug, "Enable Firmware debug");
+
 const struct dmi_system_id acp_sof_quirk_table[] = {
 	{
 		/* Valve Jupiter device */
@@ -558,6 +562,7 @@ int amd_sof_acp_probe(struct snd_sof_dev *sdev)
 		dev_dbg(sdev->dev, "fw_code_bin:%s, fw_data_bin:%s\n", adata->fw_code_bin,
 			adata->fw_data_bin);
 	}
+	adata->enable_fw_debug = enable_fw_debug;
 	acp_memory_init(sdev);
 
 	acp_dsp_stream_init(sdev);

sound/soc/sof/amd/acp.h

@@ -205,6 +205,7 @@ struct acp_dev_data {
 	struct acp_dsp_stream *dtrace_stream;
 	struct pci_dev *smn_dev;
 	struct acp_dsp_stream *probe_stream;
+	bool enable_fw_debug;
 };
 
 void memcpy_to_scratch(struct snd_sof_dev *sdev, u32 offset, unsigned int *src, size_t bytes);