diff options
Diffstat (limited to 'target/linux/omap/patches-3.12/403-ASoC-davinci-mcasp-Extract-DMA-channels-directly-fro.patch')
| -rw-r--r-- | target/linux/omap/patches-3.12/403-ASoC-davinci-mcasp-Extract-DMA-channels-directly-fro.patch | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/target/linux/omap/patches-3.12/403-ASoC-davinci-mcasp-Extract-DMA-channels-directly-fro.patch b/target/linux/omap/patches-3.12/403-ASoC-davinci-mcasp-Extract-DMA-channels-directly-fro.patch new file mode 100644 index 0000000..5fc2f13 --- /dev/null +++ b/target/linux/omap/patches-3.12/403-ASoC-davinci-mcasp-Extract-DMA-channels-directly-fro.patch @@ -0,0 +1,137 @@ +From ad5d3e5a1218a599ec02c81a3bd599acedeea00f Mon Sep 17 00:00:00 2001 +From: Jyri Sarha <jsarha@ti.com> +Date: Tue, 17 Sep 2013 12:09:30 +0300 +Subject: [PATCH 214/752] ASoC: davinci-mcasp: Extract DMA channels directly + from DT + +Extract DMA channels directly from DT as they can not be found from +platform resources anymore. This is a work-around until davinci audio +driver is updated to use dmaengine. + +Signed-off-by: Jyri Sarha <jsarha@ti.com> +--- + .../bindings/sound/davinci-mcasp-audio.txt | 5 +++ + include/linux/platform_data/davinci_asp.h | 2 + + sound/soc/davinci/davinci-mcasp.c | 47 +++++++++++++------- + 3 files changed, 39 insertions(+), 15 deletions(-) + +diff --git a/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt b/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt +index 63b67ae..68e0f47 100644 +--- a/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt ++++ b/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt +@@ -18,6 +18,11 @@ Required properties: + - serial-dir : A list of serializer pin mode. The list number should be equal + to "num-serializer" parameter. Each entry is a number indication + serializer pin direction. (0 - INACTIVE, 1 - TX, 2 - RX) ++- dmas: two element list of DMA controller phandles and DMA request line ++ ordered pairs. ++- dma-names: identifier string for each DMA request line in the dmas property. ++ These strings correspond 1:1 with the ordered pairs in dmas. The dma ++ identifiers must be "rx" and "tx". + + Optional properties: + +diff --git a/include/linux/platform_data/davinci_asp.h b/include/linux/platform_data/davinci_asp.h +index 8db5ae0..689a856 100644 +--- a/include/linux/platform_data/davinci_asp.h ++++ b/include/linux/platform_data/davinci_asp.h +@@ -84,6 +84,8 @@ struct snd_platform_data { + u8 version; + u8 txnumevt; + u8 rxnumevt; ++ int tx_dma_channel; ++ int rx_dma_channel; + }; + + enum { +diff --git a/sound/soc/davinci/davinci-mcasp.c b/sound/soc/davinci/davinci-mcasp.c +index a056fc5..acbf5f8 100644 +--- a/sound/soc/davinci/davinci-mcasp.c ++++ b/sound/soc/davinci/davinci-mcasp.c +@@ -1047,6 +1047,7 @@ static struct snd_platform_data *davinci_mcasp_set_pdata_from_of( + struct snd_platform_data *pdata = NULL; + const struct of_device_id *match = + of_match_device(mcasp_dt_ids, &pdev->dev); ++ struct of_phandle_args dma_spec; + + const u32 *of_serial_dir32; + u8 *of_serial_dir; +@@ -1109,6 +1110,28 @@ static struct snd_platform_data *davinci_mcasp_set_pdata_from_of( + pdata->serial_dir = of_serial_dir; + } + ++ ret = of_property_match_string(np, "dma-names", "tx"); ++ if (ret < 0) ++ goto nodata; ++ ++ ret = of_parse_phandle_with_args(np, "dmas", "#dma-cells", ret, ++ &dma_spec); ++ if (ret < 0) ++ goto nodata; ++ ++ pdata->tx_dma_channel = dma_spec.args[0]; ++ ++ ret = of_property_match_string(np, "dma-names", "rx"); ++ if (ret < 0) ++ goto nodata; ++ ++ ret = of_parse_phandle_with_args(np, "dmas", "#dma-cells", ret, ++ &dma_spec); ++ if (ret < 0) ++ goto nodata; ++ ++ pdata->rx_dma_channel = dma_spec.args[0]; ++ + ret = of_property_read_u32(np, "tx-num-evt", &val); + if (ret >= 0) + pdata->txnumevt = val; +@@ -1139,7 +1162,7 @@ nodata: + static int davinci_mcasp_probe(struct platform_device *pdev) + { + struct davinci_pcm_dma_params *dma_data; +- struct resource *mem, *ioarea, *res; ++ struct resource *mem, *ioarea, *res, *dma; + struct snd_platform_data *pdata; + struct davinci_audio_dev *dev; + int ret; +@@ -1213,15 +1236,11 @@ static int davinci_mcasp_probe(struct platform_device *pdev) + dma_data->sram_size = pdata->sram_size_playback; + dma_data->dma_addr = dma->start + pdata->tx_dma_offset; + +- /* first TX, then RX */ + res = platform_get_resource(pdev, IORESOURCE_DMA, 0); +- if (!res) { +- dev_err(&pdev->dev, "no DMA resource\n"); +- ret = -ENODEV; +- goto err_release_clk; +- } +- +- dma_data->channel = res->start; ++ if (res) ++ dma_data->channel = res->start; ++ else ++ dma_data->channel = pdata->tx_dma_channel; + + dma_data = &dev->dma_params[SNDRV_PCM_STREAM_CAPTURE]; + dma_data->asp_chan_q = pdata->asp_chan_q; +@@ -1231,13 +1250,11 @@ static int davinci_mcasp_probe(struct platform_device *pdev) + dma_data->dma_addr = dma->start + pdata->rx_dma_offset; + + res = platform_get_resource(pdev, IORESOURCE_DMA, 1); +- if (!res) { +- dev_err(&pdev->dev, "no DMA resource\n"); +- ret = -ENODEV; +- goto err_release_clk; +- } ++ if (res) ++ dma_data->channel = res->start; ++ else ++ dma_data->channel = pdata->rx_dma_channel; + +- dma_data->channel = res->start; + dev_set_drvdata(&pdev->dev, dev); + ret = snd_soc_register_component(&pdev->dev, &davinci_mcasp_component, + &davinci_mcasp_dai[pdata->op_mode], 1); +-- +1.7.10.4 + |