I forget to add one more observation that is i have a older omap2 and twl4030 asoc codec driver and driver/ssi mcbsp support in a 2.6.24 kernel. when i try to use this in my coustum board the audio is working fine all the ways. On Wed, Oct 22, 2008 at 6:40 PM, Mark Brown <broonie@xxxxxxxxxxxxx> wrote: > On Wed, Oct 22, 2008 at 06:17:39PM +0530, naveen krishna ch wrote: > > > I am working on omap3430 and twl4030 combination for audio. > > CCing in several people who've been working on these drivers recently. I am new so i dont have much information of the other who is working on similar things. > > > > I am wokring on 2.6.26 whre the support was not there for omap3 mcbsp. > > so i ported some stuff from the 2.6.27 latest git tree and now audio is > > working on omap3 evm. > > with the very same kernel when i try with my custom board. I am unable to > > hear audoi. > > > I get audio when i boot out of MMC (x-load and u-boot in mmc and fiel > system > > is nfs). > > But, when i usse nand(x-load and u-boot in nand and file system is on > nfs) i > > dont get audio out > > meams aplay and arecord seems working but i dont hear any audio. > > With the same software in all cases? > I used the same x-loader, u-boot and kernel and the hardware too in all the cases > > > I probe and checked the Bit clock and Word clock of the I2S which seems > are > > comming when > > i try a aplay and arecord.. > > Is there any data at all on the data pin? Have you checked that the > clock rates for the two clocks are correct (if not enough bit clocks are > generated per frame clock then the DAC will not get enough data to > produce a full sample as output)? > yeah there is data seems coming all the times i have probed the clocks and data pins. the data seems comming out of OMAP3 but i have no point here to probe in the twl4030. i used a 22050hz wav format file and the i noticed approx18Khz. I probed with the same x-load and u-boot and 2.6.24 kernel image setup also. then also the bit clock and word clock are the same as what i am getting with 2.6.26 kernel image > > I am sure that hardware has no problem. > > Can any one tell me what might be the issue and where i have to start > > debugging the issue. > > > If this is not the right palce to put my question can any one tell me the > > correct mailing list. > > This should be a good place to ask. > Can anyone refer me towards the ones who worked on this kind of audio codec driver. -- Thanks, Neyo _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
