There is a SoC between dwc and DMA block (ie. PL330) that does not have a burst signal and supports only single.

So write not-support-burst property on dts, it support single DMA mode.

Signed-off-by: Myunguk Kim mwkim@gaonchips.com --- include/sound/designware_i2s.h | 1 + sound/soc/dwc/dwc-i2s.c | 12 ++++++++++-- 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/include/sound/designware_i2s.h b/include/sound/designware_i2s.h index f6803205a9fb..060e0cbcd55c 100644 --- a/include/sound/designware_i2s.h +++ b/include/sound/designware_i2s.h @@ -36,6 +36,7 @@ struct i2s_platform_data { #define DW_I2S_QUIRK_COMP_REG_OFFSET (1 << 0) #define DW_I2S_QUIRK_COMP_PARAM1 (1 << 1) #define DW_I2S_QUIRK_16BIT_IDX_OVERRIDE (1 << 2) + #define DW_I2S_QUIRK_NOT_SUPPORT_BURST (1 << 3) unsigned int quirks; unsigned int i2s_reg_comp1; unsigned int i2s_reg_comp2; diff --git a/sound/soc/dwc/dwc-i2s.c b/sound/soc/dwc/dwc-i2s.c index 5ab1b3eb2d28..c4dd8c18beba 100644 --- a/sound/soc/dwc/dwc-i2s.c +++ b/sound/soc/dwc/dwc-i2s.c @@ -713,7 +713,10 @@ static int dw_configure_dai_by_dt(struct dw_i2s_dev *dev, dev->play_dma_data.dt.addr = res->start + I2S_TXDMA; dev->play_dma_data.dt.fifo_size = fifo_depth * (fifo_width[idx2]) >> 8; - dev->play_dma_data.dt.maxburst = 16; + if (dev->quirks & DW_I2S_QUIRK_NOT_SUPPORT_BURST) + dev->play_dma_data.dt.maxburst = 1; + else + dev->play_dma_data.dt.maxburst = 16; } if (COMP1_RX_ENABLED(comp1)) { idx2 = COMP2_RX_WORDSIZE_0(comp2); @@ -722,7 +725,10 @@ static int dw_configure_dai_by_dt(struct dw_i2s_dev *dev, dev->capture_dma_data.dt.addr = res->start + I2S_RXDMA; dev->capture_dma_data.dt.fifo_size = fifo_depth * (fifo_width[idx2] >> 8); - dev->capture_dma_data.dt.maxburst = 16; + if (dev->quirks & DW_I2S_QUIRK_NOT_SUPPORT_BURST) + dev->capture_dma_data.dt.maxburst = 1; + else + dev->capture_dma_data.dt.maxburst = 16; }

return 0; @@ -979,6 +985,8 @@ static int dw_i2s_probe(struct platform_device *pdev) ret = dw_configure_dai_by_pd(dev, dw_i2s_dai, res, pdata); } else { clk_id = "i2sclk"; + if (of_get_property(pdev->dev.of_node, "not-support-burst", NULL)) + dev->quirks |= DW_I2S_QUIRK_NOT_SUPPORT_BURST; ret = dw_configure_dai_by_dt(dev, dw_i2s_dai, res); } if (ret < 0)