@@ -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:
@@ -84,6 +84,8 @@ struct snd_platform_data {
u8 version;
u8 txnumevt;
u8 rxnumevt;
+ int tx_dma_channel;
+ int rx_dma_channel;
};
enum {
@@ -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;
@@ -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 = dat->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 = dat->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);
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 | 45 ++++++++++++++------ 3 files changed, 38 insertions(+), 14 deletions(-)