>> I get the error "aplay: set_params:1022: Unable to install hw params:" >> I have traced the problem to a failing ioctl call >> (snd_pcm_playback_ioctl) the error occurs in snd_pcm_hw_refine when >> refining the mask for the SNDRV_PCM_HW_PARAM_ACCESS mask, all the bit >> fields in my runtime->hw_constraints are zero for this field, but the >You should set these up with snd_soc_set_runtime_hwparams() with the >flags in the info field. >> requested params have the value 7, Im not sure what this means, the >> SNDRV_PCM_ACCESS_xxx defines in asound.h only go upto 4 ? >It's a bitmask at this point, treat those values as shifts. Cheers, I wasn't setting the 'SNDRV_PCM_INFO_MMAP' in my snd_pcm_hardware description, because I didn't have MMAP support, I have now added MMAP support to my driver to resolve this issue, although I thought ALSA/aplay supported drivers without MMAP support ? - This message is subject to Imagination Technologies' e-mail terms: http://www.imgtec.com/e-mail.htm Imagination Technologies Ltd is a limited company registered in England No: 1306335 Registered Office: Imagination House, Home Park Estate, Kings Langley, Hertfordshire, WD4 8LZ. Email to and from the company may be monitored for compliance and other administrative purposes. - _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
