Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Date:   Mon, 21 Dec 2020 16:50:53 +0000
From:   Mark Brown <broonie@kernel.org>
To:     Sowjanya Komatineni <skomatineni@nvidia.com>
Cc:     Pratyush Yadav <p.yadav@ti.com>,
        Boris Brezillon <boris.brezillon@collabora.com>,
        thierry.reding@gmail.com, jonathanh@nvidia.com, robh+dt@kernel.org,
        lukas@wunner.de, bbrezillon@kernel.org,
        tudor.ambarus@microchip.com, linux-spi@vger.kernel.org,
        linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org,
        devicetree@vger.kernel.org
Subject: Re: [PATCH v4 5/9] spi: spi-mem: Mark dummy transfers by setting
 dummy_data bit
Message-ID: <20201221165053.GA4521@sirena.org.uk>
References: <1608236927-28701-1-git-send-email-skomatineni@nvidia.com>
 <1608236927-28701-6-git-send-email-skomatineni@nvidia.com>
 <20201218092106.skwej2g6bk3oksbb@ti.com>
 <20201218105759.43789ccf@collabora.com>
 <31c395ee-d7a6-edc5-a790-89fad91a0a27@nvidia.com>
 <20201218191936.hb6sq7zr3zdirar7@ti.com>
 <20201218204102.GF5333@sirena.org.uk>
 <20201218204414.GG5333@sirena.org.uk>
 <c9343475-44b2-c9c4-1790-f6b50ec9c1bd@nvidia.com>
MIME-Version: 1.0
Content-Type: multipart/signed; micalg=pgp-sha512;
        protocol="application/pgp-signature"; boundary="tThc/1wpZn/ma/RB"
Content-Disposition: inline
In-Reply-To: <c9343475-44b2-c9c4-1790-f6b50ec9c1bd@nvidia.com>
User-Agent: Mutt/1.10.1 (2018-07-13)
Precedence: bulk


--tThc/1wpZn/ma/RB
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline

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.

--tThc/1wpZn/ma/RB
Content-Type: application/pgp-signature; name="signature.asc"

-----BEGIN PGP SIGNATURE-----

iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAl/g0mkACgkQJNaLcl1U
h9D/FggAgryOP3kQjSN2Lz4KeSPSrsKO6HHCcgeCbfox61nIVRcJVOBKpJX0nuU+
dbPP8gBvK3GNt/9J/WKP3k+LYD5NUfyq1lARlDe+WpU7P8VkE9TNpjctDFS2PiyO
6asDGI7iPahkE0iBmGAPqWyiUngS3X7PdN2/uuv4uSf7Fs45+f98se+GLKGa+ryK
UUTJg3DPwqmMrFqArDETTmVj7/urqREQo/gYUHtQgc7H8KCOOquuXeeOYa5dres2
GEiFGR08bDJNX2nJ3xAHtLYRJw6DZnD421m5O+FG6pxNh8AfsHQTDnvEIq2TyA0O
3D+sPY0zkYYNDEnjixQtJ8ycT5Qgdw==
=a44r
-----END PGP SIGNATURE-----

--tThc/1wpZn/ma/RB--