On Fri, Jan 04, 2013 at 05:10:33PM +0530, Supriya Karanth wrote: > From: supriya karanth <supriya.karanth@xxxxxxxxxxxxxx> > > Whenever an URB is programmed for transfer, the TXFIFO > is flushed. This results in valid packets of the > previous transfer to get flushed when double buffering > is enabled (The MUSB_TXCSR_FIFONOTEMPTY bit in TXCSR > is set indicating that a packet in the FIFO is yet to be sent) > For ex:- In Host mode Audio, noise is heard in the headset > when double buffering is enabled on the ISO endpoint. > The fifo flush is removed for double buffering case. > The fifo is now flushed only in cases of error or when > aborting a transfer. > > Also, In Host MSC case, data toggle errors are seen when double > buffering is enabled on the bulk endpoint. Whenever an URB is > programmed for transfer, the data toggle is set manually > resulting in data toggle errors on the bus. Leave the data > toggle handling upto the hardware in the double buffering case. > > Signed-off-by: supriya karanth <supriya.karanth@xxxxxxxxxxxxxx> > Signed-off-by: Praveena NADAHALLY <praveen.nadahally@xxxxxxxxxxxxxx> > Acked-by: Linus Walleij <linus.walleij@xxxxxxxxxx> how was this one tested ? -- balbi
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