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Re: [PATCH v1 12/12] serial: 8250_lpss: enable DMA on Intel Quark UART

From Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Newsgroups linux.kernel
Subject Re: [PATCH v1 12/12] serial: 8250_lpss: enable DMA on Intel Quark UART
Date 2016-04-13 16:50 +0200
Message-ID <rnuhc-2Hz-19@gated-at.bofh.it> (permalink)
References (4 earlier) <rn9mq-1RY-5@gated-at.bofh.it> <rn9FL-22N-1@gated-at.bofh.it> <rnr9E-rU-13@gated-at.bofh.it> <rnrMn-116-47@gated-at.bofh.it> <rnu7w-2D7-3@gated-at.bofh.it>
Organization Intel Finland Oy

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On Wed, 2016-04-13 at 15:34 +0100, Bryan O'Donoghue wrote:
> On Wed, 2016-04-13 at 15:03 +0300, Andy Shevchenko wrote:
> > 
> > Because a probability of FIFO overrun.
> > 
> > There is a big chapter ("Peripheral Burst Transaction Requests") in
> > dw_apb_dmac_db.pdf covering this.
> I thought there was flow control between the controller and the FIFO
> here ? I don't have the spec SoC spec for the UART to hand but, if
> memory serves...

Wait, you mean flow control between DMA controller and UART FIFO, or I
misread you?

-- 
Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Intel Finland Oy

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Thread

[PATCH v1 12/12] serial: 8250_lpss: enable DMA on Intel Quark UART Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2016-04-07 22:40 +0200
  Re: [PATCH v1 12/12] serial: 8250_lpss: enable DMA on Intel Quark  UART Bryan O'Donoghue <pure.logic@nexus-software.ie> - 2016-04-11 17:40 +0200
    Re: [PATCH v1 12/12] serial: 8250_lpss: enable DMA on Intel Quark UART Andy Shevchenko <andy.shevchenko@gmail.com> - 2016-04-11 18:00 +0200
      Re: [PATCH v1 12/12] serial: 8250_lpss: enable DMA on Intel Quark UART Andy Shevchenko <andy.shevchenko@gmail.com> - 2016-04-11 18:10 +0200
      Re: [PATCH v1 12/12] serial: 8250_lpss: enable DMA on Intel Quark  UART Bryan O'Donoghue <pure.logic@nexus-software.ie> - 2016-04-12 18:30 +0200
        Re: [PATCH v1 12/12] serial: 8250_lpss: enable DMA on Intel Quark  UART Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2016-04-12 18:50 +0200
          Re: [PATCH v1 12/12] serial: 8250_lpss: enable DMA on Intel Quark  UART Bryan O'Donoghue <pure.logic@nexus-software.ie> - 2016-04-13 13:30 +0200
            Re: [PATCH v1 12/12] serial: 8250_lpss: enable DMA on Intel Quark  UART Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2016-04-13 14:10 +0200
              Re: [PATCH v1 12/12] serial: 8250_lpss: enable DMA on Intel Quark  UART Bryan O'Donoghue <pure.logic@nexus-software.ie> - 2016-04-13 16:40 +0200
                Re: [PATCH v1 12/12] serial: 8250_lpss: enable DMA on Intel Quark  UART Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2016-04-13 16:50 +0200
                Re: [PATCH v1 12/12] serial: 8250_lpss: enable DMA on Intel Quark  UART Bryan O'Donoghue <pure.logic@nexus-software.ie> - 2016-04-13 17:30 +0200

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