Re: [PATCH] dma: add new DMA control commands

From: Marek Vasut
Date: Thu Oct 18 2012 - 06:51:20 EST

Dear Huang Shijie,

> ä 2012å10æ18æ 16:49, Marek Vasut åé:
> > Dear Huang Shijie,
> >
> >> ä 2012å10æ18æ 16:16, Marek Vasut åé:
> >>> So we can't stream data from the chip? About time to adjust the MTD
> >>> framework to allow that. Maybe implement a command queue?
> >>
> >> IMHO, it's not possible. Because the READ-PAGE(00h-30h) command needs to
> >> check the busy status
> >> which means we have to stop in the middle, so we can not chain the all
> >> the read-pages DMA commands.
> >
> > Can the DMA not branch?
> it's too complicated to the MTD layer, as well as the gpmi driver.

Can you please elaborate ?

Best regards,
Marek Vasut
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at