ASoC: mediatek: Enable 33bit memory address to support 4GB DRAM

If platform is embedded with memory more than 3GB, the address will
go out of the scope that 32-bit can handle with. This patch sets the
dma_mask and MSB properly to describe its address to 33-bit.

Signed-off-by: Hidalgo Huang <hidalgo.huang@mediatek.com>
Signed-off-by: PC Liao <pc.liao@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/mediatek/mtk-afe-common.h b/sound/soc/mediatek/mtk-afe-common.h
index 9b1af1a..f341f62 100644 (file)
--- a/sound/soc/mediatek/mtk-afe-common.h
+++ b/sound/soc/mediatek/mtk-afe-common.h
@@ -87,6 +87,7 @@ struct mtk_afe_memif_data {
        int irq_en_shift;
        int irq_fs_shift;
        int irq_clr_shift;
+       int msb_shift;
 };
 
 struct mtk_afe_memif {

diff --git a/sound/soc/mediatek/mtk-afe-pcm.c b/sound/soc/mediatek/mtk-afe-pcm.c
index 08af9f5..689c51f 100644 (file)
--- a/sound/soc/mediatek/mtk-afe-pcm.c
+++ b/sound/soc/mediatek/mtk-afe-pcm.c
@@ -21,6 +21,7 @@
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
+#include <linux/dma-mapping.h>
 #include <linux/pm_runtime.h>
 #include <sound/soc.h>
 #include "mtk-afe-common.h"
@@ -35,6 +36,7 @@
 #define AFE_I2S_CON1           0x0034
 #define AFE_I2S_CON2           0x0038
 #define AFE_CONN_24BIT         0x006c
+#define AFE_MEMIF_MSB          0x00cc
 
 #define AFE_CONN1              0x0024
 #define AFE_CONN2              0x0028
@@ -592,6 +594,7 @@ static int mtk_afe_dais_hw_params(struct snd_pcm_substream *substream,
        struct snd_soc_pcm_runtime *rtd = substream->private_data;
        struct mtk_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
        struct mtk_afe_memif *memif = &afe->memif[rtd->cpu_dai->id];
+       int msb_at_bit33 = 0;
        int ret;
 
        dev_dbg(afe->dev,
@@ -603,7 +606,8 @@ static int mtk_afe_dais_hw_params(struct snd_pcm_substream *substream,
        if (ret < 0)
                return ret;
 
-       memif->phys_buf_addr = substream->runtime->dma_addr;
+       msb_at_bit33 = upper_32_bits(substream->runtime->dma_addr) ? 1 : 0;
+       memif->phys_buf_addr = lower_32_bits(substream->runtime->dma_addr);
        memif->buffer_size = substream->runtime->dma_bytes;
 
        /* start */
@@ -614,6 +618,11 @@ static int mtk_afe_dais_hw_params(struct snd_pcm_substream *substream,
                     memif->data->reg_ofs_base + AFE_BASE_END_OFFSET,
                     memif->phys_buf_addr + memif->buffer_size - 1);
 
+       /* set MSB to 33-bit */
+       regmap_update_bits(afe->regmap, AFE_MEMIF_MSB,
+                          1 << memif->data->msb_shift,
+                          msb_at_bit33 << memif->data->msb_shift);
+
        /* set channel */
        if (memif->data->mono_shift >= 0) {
                unsigned int mono = (params_channels(params) == 1) ? 1 : 0;
@@ -978,6 +987,7 @@ static const struct mtk_afe_memif_data memif_data[MTK_AFE_MEMIF_NUM] = {
                .irq_en_shift = 0,
                .irq_fs_shift = 4,
                .irq_clr_shift = 0,
+               .msb_shift = 0,
        }, {
                .name = "DL2",
                .id = MTK_AFE_MEMIF_DL2,
@@ -991,6 +1001,7 @@ static const struct mtk_afe_memif_data memif_data[MTK_AFE_MEMIF_NUM] = {
                .irq_en_shift = 2,
                .irq_fs_shift = 16,
                .irq_clr_shift = 2,
+               .msb_shift = 1,
        }, {
                .name = "VUL",
                .id = MTK_AFE_MEMIF_VUL,
@@ -1004,6 +1015,7 @@ static const struct mtk_afe_memif_data memif_data[MTK_AFE_MEMIF_NUM] = {
                .irq_en_shift = 1,
                .irq_fs_shift = 8,
                .irq_clr_shift = 1,
+               .msb_shift = 6,
        }, {
                .name = "DAI",
                .id = MTK_AFE_MEMIF_DAI,
@@ -1017,6 +1029,7 @@ static const struct mtk_afe_memif_data memif_data[MTK_AFE_MEMIF_NUM] = {
                .irq_en_shift = 3,
                .irq_fs_shift = 20,
                .irq_clr_shift = 3,
+               .msb_shift = 5,
        }, {
                .name = "AWB",
                .id = MTK_AFE_MEMIF_AWB,
@@ -1030,6 +1043,7 @@ static const struct mtk_afe_memif_data memif_data[MTK_AFE_MEMIF_NUM] = {
                .irq_en_shift = 14,
                .irq_fs_shift = 24,
                .irq_clr_shift = 6,
+               .msb_shift = 3,
        }, {
                .name = "MOD_DAI",
                .id = MTK_AFE_MEMIF_MOD_DAI,
@@ -1043,6 +1057,7 @@ static const struct mtk_afe_memif_data memif_data[MTK_AFE_MEMIF_NUM] = {
                .irq_en_shift = 3,
                .irq_fs_shift = 20,
                .irq_clr_shift = 3,
+               .msb_shift = 4,
        }, {
                .name = "HDMI",
                .id = MTK_AFE_MEMIF_HDMI,
@@ -1056,6 +1071,7 @@ static const struct mtk_afe_memif_data memif_data[MTK_AFE_MEMIF_NUM] = {
                .irq_en_shift = 12,
                .irq_fs_shift = -1,
                .irq_clr_shift = 4,
+               .msb_shift = 8,
        },
 };
 
@@ -1189,6 +1205,10 @@ static int mtk_afe_pcm_dev_probe(struct platform_device *pdev)
        struct mtk_afe *afe;
        struct resource *res;
 
+       ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(33));
+       if (ret)
+               return ret;
+
        afe = devm_kzalloc(&pdev->dev, sizeof(*afe), GFP_KERNEL);
        if (!afe)
                return -ENOMEM;