* Janusz Krzysztofik <jkrzyszt@xxxxxxxxxxxx> [090618 14:52]: > Tony Lindgren wrote: >> * Peter Ujfalusi <peter.ujfalusi@xxxxxxxxx> [090618 12:03]: >>> On Wednesday 17 June 2009 17:12:38 ext Janusz Krzysztofik wrote: >>>> Janusz Krzysztofik wrote: >>>>> After all, it is more and more likely that the problem is not dma, but >>>>> mcbsp just not shifting any data for some mysterious reason. >>>> I finally did what I should have already done before: learned about >>>> dynamic debugging, turned it on and probably got the answer from >>>> omap_msbsp_dump_reg(): all mcbsp1 register read operations returned >>>> 0xffff. So it looks like I simply get no acccess to mcbsp1 at all. Now I >>>> wonder if I can close this thread with a conclusion that mcbsp1 on >>>> opam15xx is simply not yet supported by the mainline kernel that I have >>>> based my work on. >>> Hmmm, this is quite unexpected. >>> Can you access to mcbsp2 or 3 registers, or only the mcbsp1 registers >>> are not accessible? >>> One thing that I have noticed is that the McBSP1 (and 3) is under the >>> DSP Public Peripherals, while McBSP2 is under MPU Public Peripherals >>> (in OMAP1510). >>> I have to check it further what this actually means... >> >> Hmmm, do you have the DSP code compiled (and loaded)? >> >> On omap1, DSP needs to be powered and idled before some mcbsp clocks can >> be used. Or at least needs to be powered up. > > AFAICS there is no DSP code in mainline at all, so the answer is no, DSP > was likely not powered up at all. For several weeks I was trying to do > what was impossible :/. But fortunatelly, I have learned a lot ;). We at least used to have code to power and idle the DSP even without the dspgateway compiled in.. Sorry I don't remember the details. But most likely you need to have the dspgateway patch enabled. Tony -- To unsubscribe from this list: send the line "unsubscribe alsa-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
