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[217.229.28.128]) by smtp.gmail.com with ESMTPSA id q188-v6sm14412242wmd.36.2018.08.09.06.47.54 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 09 Aug 2018 06:47:55 -0700 (PDT) Date: Thu, 9 Aug 2018 15:47:54 +0200 From: Thierry Reding To: Aapo Vienamo Cc: Ulf Hansson , Rob Herring , Mark Rutland , Jonathan Hunter , Adrian Hunter , Mikko Perttunen , linux-mmc@vger.kernel.org, devicetree@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 3/8] mmc: tegra: Implement HS400 enhanced strobe Message-ID: <20180809134754.GE21639@ulmo> References: <1533650404-18125-1-git-send-email-avienamo@nvidia.com> <1533650404-18125-4-git-send-email-avienamo@nvidia.com> <20180809114345.GL21639@ulmo> <20180809152254.03b97af0@dhcp-10-21-25-168> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="SqEuGDw53xMPnx3c" Content-Disposition: inline In-Reply-To: <20180809152254.03b97af0@dhcp-10-21-25-168> User-Agent: Mutt/1.10.0 (2018-05-17) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --SqEuGDw53xMPnx3c Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Aug 09, 2018 at 03:22:54PM +0300, Aapo Vienamo wrote: > On Thu, 9 Aug 2018 13:43:45 +0200 > Thierry Reding wrote: >=20 > > On Tue, Aug 07, 2018 at 04:59:59PM +0300, Aapo Vienamo wrote: > > > Implement HS400 enhanced strobe. =20 > >=20 > > Can you provide a little more information about what the impact is of > > this? Does this increase throughput? How much? >=20 > The eMMC enhanced strobe is a mechanism that can be used instead of the > HS400 tuning procedure. Note that the delay line calibration implemented > later on in this series is Tegra specific and has to be performed > regardless of which type of HS400 tuning mechanism is used. Sounds like a variation of that would be good material for the commit message. 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