Re: [PATCH v4 5/9] spi: spi-mem: Mark dummy transfers by setting dummy_data bit

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Subject: Re: [PATCH v4 5/9] spi: spi-mem: Mark dummy transfers by setting dummy_data bit
From: Mark Brown <broonie@xxxxxxxxxx>
Date: Mon, 21 Dec 2020 16:50:53 +0000
Cc: Pratyush Yadav <p.yadav@xxxxxx>, Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx>, thierry.reding@xxxxxxxxx, jonathanh@xxxxxxxxxx, robh+dt@xxxxxxxxxx, lukas@xxxxxxxxx, bbrezillon@xxxxxxxxxx, tudor.ambarus@xxxxxxxxxxxxx, linux-spi@xxxxxxxxxxxxxxx, linux-tegra@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, devicetree@xxxxxxxxxxxxxxx
In-reply-to: <c9343475-44b2-c9c4-1790-f6b50ec9c1bd@nvidia.com>
User-agent: Mutt/1.10.1 (2018-07-13)

On Fri, Dec 18, 2020 at 02:01:56PM -0800, Sowjanya Komatineni wrote:

> From quick check, I see HW dummy cycles transfer of 128KB shows 18 Mb/s
> while SW transfer of bytes shows 17.3 MB/s on average.

OK, it's not going to revolutionize the world or anything but that's
definitely a speedup.

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References:
- [PATCH v4 0/9] Add Tegra Quad SPI driver
  - From: Sowjanya Komatineni
- [PATCH v4 5/9] spi: spi-mem: Mark dummy transfers by setting dummy_data bit
  - From: Sowjanya Komatineni
- Re: [PATCH v4 5/9] spi: spi-mem: Mark dummy transfers by setting dummy_data bit
  - From: Pratyush Yadav
- Re: [PATCH v4 5/9] spi: spi-mem: Mark dummy transfers by setting dummy_data bit
  - From: Boris Brezillon
- Re: [PATCH v4 5/9] spi: spi-mem: Mark dummy transfers by setting dummy_data bit
  - From: Sowjanya Komatineni
- Re: [PATCH v4 5/9] spi: spi-mem: Mark dummy transfers by setting dummy_data bit
  - From: Pratyush Yadav
- Re: [PATCH v4 5/9] spi: spi-mem: Mark dummy transfers by setting dummy_data bit
  - From: Mark Brown
- Re: [PATCH v4 5/9] spi: spi-mem: Mark dummy transfers by setting dummy_data bit
  - From: Mark Brown
- Re: [PATCH v4 5/9] spi: spi-mem: Mark dummy transfers by setting dummy_data bit
  - From: Sowjanya Komatineni

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