On Sun, Apr 14, 2013 at 10:25:49AM -0500, Timur Tabi wrote: > Markus Pargmann wrote: > >I only ported the imx-ssi ac97 driver code and tested twice using DMA > >without success. But there is a good description of the problem in > >imx-ssi: > > > >" The WM9712 with which this driver > >was developed with always sends GPIO status data in slot 12 which > >we receive in our (PCM-) data stream. The only chance we have is to > >manually skip this data in the FIQ handler." > > Ah, so this is a work-around for a bug, where the codec is > incompatible with the SoC? Mark, are you familiar with this issue? > Is there a way to reconfigure the codec so that it works better with > the SoC? It seems ridiculous to add all this code just because an > incompatible codec was chosen for some board. > > Either way, the board DTS needs to clearly state *why* we're > enabling FIQ mode when DMA mode should work. And the patch that > adds FIQ support needs to say that it's for boards with broken DMA > support.
Okay, I will add those comments to the commit message, binding documentation and add parts of the imx-ssi problem description to fsl-ssi. Regards, Markus -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ devicetree-discuss mailing list [email protected] https://lists.ozlabs.org/listinfo/devicetree-discuss
