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ASoC: dwc: Drop DMA channel names assignment 

The dw_configure_dai_by_dt() function and further dev->{play,capture}
_dma_data.dt data structures seem to be used in this driver only in case
of a system using devicetree, thus chan_name assignments have no effect
since they will be ignored in dmaengine_pcm_request_chan_of() call and
will be substituted with values taken form dmaengine_pcm_dma_channel_names[]
table ("tx", "rx").

Also there is no any "TX", "RX" dma-names entries in arch/arm/boot/dts,
only lower case "tx", "rx" seem to be used.

Lastly, this driver doesn't set SND_DMAENGINE_PCM_FLAG_CUSTOM_CHANNEL_NAME
flag when registering a dmaengine PCM to indicate the chan_name should be
used.

My intention is to eventually remove the struct snd_dmaengine_dai_dma_data
chan_name field as there is also a chan_names[] field in struct
snd_dmaengine_pcm_config which can be used for same purpose.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Sylwester Nawrocki 2016-08-04 12:22:32 +02:00 committed by Mark Brown
parent 29b4817d40
commit 35397edeb1
1 changed files with 0 additions and 2 deletions
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2
sound/soc/dwc/designware_i2s.c
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@ -577,7 +577,6 @@ static int dw_configure_dai_by_dt(struct dw_i2s_dev *dev,
dev->capability |= DWC_I2S_PLAY;
dev->play_dma_data.dt.addr = res->start + I2S_TXDMA;
dev->play_dma_data.dt.addr_width = bus_widths[idx];
dev->play_dma_data.dt.chan_name = "TX";
dev->play_dma_data.dt.fifo_size = fifo_depth *
(fifo_width[idx2]) >> 8;
dev->play_dma_data.dt.maxburst = 16;
@ -588,7 +587,6 @@ static int dw_configure_dai_by_dt(struct dw_i2s_dev *dev,
dev->capability |= DWC_I2S_RECORD;
dev->capture_dma_data.dt.addr = res->start + I2S_RXDMA;
dev->capture_dma_data.dt.addr_width = bus_widths[idx];
dev->capture_dma_data.dt.chan_name = "RX";
dev->capture_dma_data.dt.fifo_size = fifo_depth *
(fifo_width[idx2] >> 8);
dev->capture_dma_data.dt.maxburst = 16;