linux-kernel - [PATCH] ASoC: SOF: amd: Enable cache for AMD Rembrandt platform

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Message-ID: <20221213071640.3038853-1-Vsujithkumar.Reddy@amd.com>
Date:   Tue, 13 Dec 2022 12:46:37 +0530
From:   V sujith kumar Reddy <Vsujithkumar.Reddy@....com>
To:     <broonie@...nel.org>, <alsa-devel@...a-project.org>
CC:     <Vijendar.Mukunda@....com>, <Basavaraj.Hiregoudar@....com>,
        <Sunil-kumar.Dommati@....com>, <venkataprasad.potturu@....com>,
        <ssabakar@....com>,
        V sujith kumar Reddy <Vsujithkumar.Reddy@....com>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Peter Ujfalusi <peter.ujfalusi@...ux.intel.com>,
        "Bard Liao" <yung-chuan.liao@...ux.intel.com>,
        Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>,
        Kai Vehmanen <kai.vehmanen@...ux.intel.com>,
        Daniel Baluta <daniel.baluta@....com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        "Ajit Kumar Pandey" <AjitKumar.Pandey@....com>,
        "moderated list:SOUND - SOUND OPEN FIRMWARE (SOF) DRIVERS" 
        <sound-open-firmware@...a-project.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: [PATCH] ASoC: SOF: amd: Enable cache for AMD Rembrandt platform

Enable DSP cache for ACP memory

Signed-off-by: V sujith kumar Reddy <Vsujithkumar.Reddy@....com>
---
 sound/soc/sof/amd/acp-dsp-offset.h | 4 ++++
 sound/soc/sof/amd/acp-loader.c     | 7 +++++++
 sound/soc/sof/amd/acp.h            | 2 ++
 3 files changed, 13 insertions(+)

diff --git a/sound/soc/sof/amd/acp-dsp-offset.h b/sound/soc/sof/amd/acp-dsp-offset.h
index de5726251dc6..920155dee819 100644
--- a/sound/soc/sof/amd/acp-dsp-offset.h
+++ b/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
diff --git a/sound/soc/sof/amd/acp-loader.c b/sound/soc/sof/amd/acp-loader.c
index 090c8b18c83c..a4bce5a3ae48 100644
--- a/sound/soc/sof/amd/acp-loader.c
+++ b/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);
diff --git a/sound/soc/sof/amd/acp.h b/sound/soc/sof/amd/acp.h
index 09e16ef8afa0..4314094a97fd 100644
--- a/sound/soc/sof/amd/acp.h
+++ b/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,
-- 
2.25.1