At Sat, 20 Aug 2011 22:21:10 +0900, anish singh wrote: > > adding more information and experts on alsa. > > On Fri, Aug 19, 2011 at 9:23 PM, anish singh > <anish198519851985@xxxxxxxxx> wrote: > > I need some suggestions for below situation: > > > > Headset if it is inserted before the device is powered up is > > now detected by forcefully calling the interrupt handler in > > the probe function of the headset driver. > Headset is detected in our andorid device by using a detect gpio > which is turned on when headset is inserted.If the headset > is inserted right from very beginging i.e. before device is even > turned on then we forcefully call the handler and thereby in > handler we check if gpio is turned on or not and do the rest > of things. > > > Once the handler is called then we find out if the headset > > is there or not using gpio and then normal detection happens > > > > Is it the right way to detect the device during power-up? > Does not linux have any other way of doing this which i may > be missing? How this is handled in the case of ALSA jack i.e. > the jack drivers which is using alsa framework for detection? > Android doesn't use ALSA framework for reporting JACK. Judging from the source code, the likely problem is that the driver doesn't initialize the switch-state in input device. The switch-state is updated only when GPIO IRQ comes up. Takashi _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
