[PATCH 3/6] davinci: edma: clear events in edma_start()
stanley.miao
stanley.miao at windriver.com
Tue May 25 06:05:52 EDT 2010
Kevin Hilman wrote:
> <snip>
>>>
>>>
>> This patch causes that the sound can not work normally on OMAP_L138.
>>
>>
>
> Can you describe "can not work normally"? Does that mean simply does
> not work, or works with pops & clicks etc.?
>
> Just to clarify... how did you isolate it to this patch.
>
> If you revert just this patch on current davinci git, do you have
> working sound as you expect again?
>
Below is the test result:
$/root> aplay audiodump.wav
Playing WAVE 'audiodump.wav' : Signed 16 bit Little Endian, Rate 44100
Hz, Stereo
aplay: pcm_write:1269: write error: Input/output error
$/root>
After revert it, the audio works fine.
Hi, Brian,
For the SPI issue, try this patch:
----------------------------------------
--- a/drivers/spi/davinci_spi.c
+++ b/drivers/spi/davinci_spi.c
@@ -359,8 +359,10 @@ static void davinci_spi_dma_rx_callback(unsigned
lch, u16 ch_status, void *data)
if (ch_status == DMA_COMPLETE)
edma_stop(davinci_spi_dma->dma_rx_channel);
- else
+ else {
+ edma_stop(davinci_spi_dma->dma_rx_channel);
edma_clean_channel(davinci_spi_dma->dma_rx_channel);
+ }
complete(&davinci_spi_dma->dma_rx_completion);
/* We must disable the DMA RX request */
@@ -380,8 +382,10 @@ static void davinci_spi_dma_tx_callback(unsigned
lch, u16 ch_status, void *data)
if (ch_status == DMA_COMPLETE)
edma_stop(davinci_spi_dma->dma_tx_channel);
- else
+ else {
+ edma_stop(davinci_spi_dma->dma_tx_channel);
edma_clean_channel(davinci_spi_dma->dma_tx_channel);
+ }
complete(&davinci_spi_dma->dma_tx_completion);
-------------------------------------------------
Stanley.
> Kevin
>
>
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