ASoC: SOF: amd: Enable cache for AMD Rembrandt platform

Enable DSP cache for ACP memory
Signed-off-by: V sujith kumar Reddy <Vsujithkumar.Reddy@amd.com>
Link: https://lore.kernel.org/r/20221213071640.3038853-1-Vsujithkumar.Reddy@amd.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/amd/acp-dsp-offset.h

@@ -85,4 +85,8 @@
 
 #define ACP_SCRATCH_REG_0			0x10000
 #define ACP6X_DSP_FUSION_RUNSTALL		0x0644
+
+/* Cache window registers */
+#define ACP_DSP0_CACHE_OFFSET0			0x0420
+#define ACP_DSP0_CACHE_SIZE0			0x0424
 #endif

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

@@ -151,6 +151,7 @@ static void configure_pte_for_fw_loading(int type, int num_pages, struct acp_dev
 int acp_dsp_pre_fw_run(struct snd_sof_dev *sdev)
 {
 	struct pci_dev *pci = to_pci_dev(sdev->dev);
+	const struct sof_amd_acp_desc *desc = get_chip_info(sdev->pdata);
 	struct acp_dev_data *adata;
 	unsigned int src_addr, size_fw;
 	u32 page_count, dma_size;
@@ -183,6 +184,12 @@ int acp_dsp_pre_fw_run(struct snd_sof_dev *sdev)
 	if (ret < 0)
 		dev_err(sdev->dev, "acp dma transfer status: %d\n", ret);
 
+	if (desc->rev > 3) {
+		/* Cache Window enable */
+		snd_sof_dsp_write(sdev, ACP_DSP_BAR, ACP_DSP0_CACHE_OFFSET0, desc->sram_pte_offset);
+		snd_sof_dsp_write(sdev, ACP_DSP_BAR, ACP_DSP0_CACHE_SIZE0, SRAM1_SIZE | BIT(31));
+	}
+
 	/* Free memory once DMA is complete */
 	dma_size =  (PAGE_ALIGN(sdev->basefw.fw->size) >> PAGE_SHIFT) * ACP_PAGE_SIZE;
 	dma_free_coherent(&pci->dev, dma_size, adata->bin_buf, adata->sha_dma_addr);

sound/soc/sof/amd/acp.h

@@ -72,6 +72,8 @@
 #define EXCEPT_MAX_HDR_SIZE			0x400
 #define AMD_STACK_DUMP_SIZE			32
 
+#define SRAM1_SIZE				0x13A000
+
 enum clock_source {
 	ACP_CLOCK_96M = 0,
 	ACP_CLOCK_48M,