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Re: [PATCH linux-next v3 1/1] spi: imx: dynamic burst length adjust for PIO mode

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Hi Jiada,

On Fri, May 26, 2017 at 2:02 AM,  <jiada_wang@mentor.com> wrote:
> From: Jiada Wang <jiada_wang@mentor.com>
>
> previously burst length (BURST_LENGTH) is always set to equal
> to bits_per_word, causes a 10us gap between each word in
> transfer, which significantly affects performance.
>
> This patch uses 32 bits transfer to simulate lower bits transfer,
> and adjusts burst length runtimely to use biggeest burst length
> as possible to reduce the gaps in transfer for PIO mode.

Just curious: what is the performance gain you observe with this patch?

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[PATCH linux-next v3 1/1] spi: imx: dynamic burst length adjust for PIO mode <jiada_wang@mentor.com> - 2017-05-26 07:10 +0200
  Re: [PATCH linux-next v3 1/1] spi: imx: dynamic burst length adjust  for PIO mode Sascha Hauer <s.hauer@pengutronix.de> - 2017-05-29 12:00 +0200
    Re: [PATCH linux-next v3 1/1] spi: imx: dynamic burst length adjust  for PIO mode Jiada Wang <jiada_wang@mentor.com> - 2017-06-01 14:00 +0200
      Re: [PATCH linux-next v3 1/1] spi: imx: dynamic burst length adjust  for PIO mode Sascha Hauer <s.hauer@pengutronix.de> - 2017-06-02 07:40 +0200
  Re: [PATCH linux-next v3 1/1] spi: imx: dynamic burst length adjust  for PIO mode Fabio Estevam <festevam@gmail.com> - 2017-05-29 13:10 +0200
    Re: [PATCH linux-next v3 1/1] spi: imx: dynamic burst length adjust  for PIO mode Jiada Wang <jiada_wang@mentor.com> - 2017-06-01 10:00 +0200

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