Hello Stefan, On Mon, Dec 16, 2019 at 07:28:04PM +0100, Stefan Wahren wrote: > Hi Ondrej, > > sorry, i don't have access to a Orange Pi 3. > > I looked at a AP6256 datasheet [1], but i couldn't find any helpful > information about flow control during power up. > > Are you able to analyze this issue more further before we revert this patch? I'd like to, but I'll not be able to attach logic probe to the AP6256 module. It's too fine pitch for soldering. I may try setting CTS/RTS to gpio/input mode and grab the capture of the GPIO port states in time to see what's happening during probe of bt_bcm module. I don't really understand what effect your patch is supposed to have on the CTS/RTS lines during power up from the commit description. Can you please explain it more concretely? I'll be able to get to playing with this after the holidays. > I would like to know if this is some kind of timing issue, since in > patch "bluetooth: hci_bcm: Give more time to come out of reset" you > introduced a huge power on delay. I wouldn't mind if we could get rid of that. > Meanwhile i will play with modifications of original patch on the > Raspberry Pi 4 and come back to you. thank you, o. > Thanks > Stefan > > [1] - > http://www.sparklan.com/p2-products-detail.php?PKey=4984FVukjcpylzifQiM-TGFE-IKXD--BCwf4P15KfrU&AP6256 >
