On 01/04/2014 05:52, zhenjun_...@icloudaegis.com wrote:
> Hi, I have a RT5350 module with wm8978 codec and try to driver
> sound under openwrt. The relevant driver in openwrt trunk as
> follows: sound/soc/ralink/mt7620-i2s.c
> sound/soc/ralink/mt7620-wm8960.c drivers/dma/ralink-gdma.c
>
> The i2s integrated by RT5350 is same as the one of MT7620. So I use
> the file "mt7620-i2s.c" directly and write a file "rt5350-wm8978.c"
> as alsa machine driver. After modifying several configs, I build
> the image and flash it into module. The kernel have found sound
> card on booting, initialized it successfully. But when I play a
> wave file, the codec work badly. The wave file should sound
> "rear..left", I heard "left...left". I guess that there are
> something wrong in data transmission. Now I want to check the
> mt7620-i2s and ralink-gdma drivers. Does anyone have used these
> drivers? Or does anyone run mt7620-wm8960 group? Any response will
> be very appreciated!
Hi,
nice to see that you have some sound. i have the mt7620a evb and i am
having problems to bring up the wm8960 codec
the gdma is only tested as far as .. "i can see traffic on the bus
with my logic analyser", but as the codec fails to come up, i am not
able to debug further as i have o sound.
that is that current state of the driver ... once i figured out why
the code does not playback any sound i can figure out why the sent pcm
data is corrupt.
John
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