[PATCH 4/5] ASoC: SOF: mediatek: mt8195 modify dram type as non-cache

[Pierre-Louis Bossart]

From: YC Hung <yc.hung at mediatek.com>

Modify dram as non-cache memory type to avoid wrong access between
host and dsp side and get the size of shared dma from device tree.

Reviewed-by: Curtis Malainey <cujomalainey at chromium.org>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan at linux.intel.com>
Signed-off-by: YC Hung <yc.hung at mediatek.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>
---
 sound/soc/sof/mediatek/mt8195/mt8195.c | 37 +++++++++++++++-----------
 1 file changed, 21 insertions(+), 16 deletions(-)

diff --git a/sound/soc/sof/mediatek/mt8195/mt8195.c b/sound/soc/sof/mediatek/mt8195/mt8195.c
index 30111ab23bf5e..64d1b5a4e31b1 100644
--- a/sound/soc/sof/mediatek/mt8195/mt8195.c
+++ b/sound/soc/sof/mediatek/mt8195/mt8195.c
@@ -145,6 +145,14 @@ static int platform_parse_resource(struct platform_device *pdev, void *data)
 
 	dev_dbg(dev, "DMA %pR\n", &res);
 
+	adsp->pa_shared_dram = (phys_addr_t)res.start;
+	adsp->shared_size = resource_size(&res);
+	if (adsp->pa_shared_dram & DRAM_REMAP_MASK) {
+		dev_err(dev, "adsp shared dma memory(%#x) is not 4K-aligned\n",
+			(u32)adsp->pa_shared_dram);
+		return -EINVAL;
+	}
+
 	ret = of_reserved_mem_device_init(dev);
 	if (ret) {
 		dev_err(dev, "of_reserved_mem_device_init failed\n");
@@ -273,23 +281,18 @@ static int adsp_shared_base_ioremap(struct platform_device *pdev, void *data)
 {
 	struct device *dev = &pdev->dev;
 	struct mtk_adsp_chip_info *adsp = data;
-	u32 shared_size;
 
 	/* remap shared-dram base to be non-cachable */
-	shared_size = TOTAL_SIZE_SHARED_DRAM_FROM_TAIL;
-	adsp->pa_shared_dram = adsp->pa_dram + adsp->dramsize - shared_size;
-	if (adsp->va_dram) {
-		adsp->shared_dram = adsp->va_dram + DSP_DRAM_SIZE - shared_size;
-	} else {
-		adsp->shared_dram = devm_ioremap(dev, adsp->pa_shared_dram,
-						 shared_size);
-		if (!adsp->shared_dram) {
-			dev_err(dev, "ioremap failed for shared DRAM\n");
-			return -ENOMEM;
-		}
+	adsp->shared_dram = devm_ioremap(dev, adsp->pa_shared_dram,
+					 adsp->shared_size);
+	if (!adsp->shared_dram) {
+		dev_err(dev, "failed to ioremap base %pa size %#x\n",
+			adsp->shared_dram, adsp->shared_size);
+		return -ENOMEM;
 	}
+
 	dev_dbg(dev, "shared-dram vbase=%p, phy addr :%pa,  size=%#x\n",
-		adsp->shared_dram, &adsp->pa_shared_dram, shared_size);
+		adsp->shared_dram, &adsp->pa_shared_dram, adsp->shared_size);
 
 	return 0;
 }
@@ -361,9 +364,11 @@ static int mt8195_dsp_probe(struct snd_sof_dev *sdev)
 		goto err_adsp_sram_power_off;
 	}
 
-	sdev->bar[SOF_FW_BLK_TYPE_SRAM] = devm_ioremap_wc(sdev->dev,
-							  priv->adsp->pa_dram,
-							  priv->adsp->dramsize);
+	priv->adsp->va_sram = sdev->bar[SOF_FW_BLK_TYPE_IRAM];
+
+	sdev->bar[SOF_FW_BLK_TYPE_SRAM] = devm_ioremap(sdev->dev,
+						       priv->adsp->pa_dram,
+						       priv->adsp->dramsize);
 	if (!sdev->bar[SOF_FW_BLK_TYPE_SRAM]) {
 		dev_err(sdev->dev, "failed to ioremap base %pa size %#x\n",
 			&priv->adsp->pa_dram, priv->adsp->dramsize);
-- 
2.34.1