From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thierry Reding Subject: Re: [PATCH V10 3/4] mmc: sdhci: Add ADMA3 DMA support for V4 enabled host Date: Wed, 23 Jan 2019 10:15:32 +0100 Message-ID: <20190123091532.GB24072@ulmo> References: <1548186993-6229-1-git-send-email-skomatineni@nvidia.com> <1548186993-6229-3-git-send-email-skomatineni@nvidia.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="TakKZr9L6Hm6aLOc" Return-path: Content-Disposition: inline In-Reply-To: <1548186993-6229-3-git-send-email-skomatineni@nvidia.com> Sender: linux-kernel-owner@vger.kernel.org To: Sowjanya Komatineni Cc: robh+dt@kernel.org, mark.rutland@arm.com, mperttunen@nvidia.com, chunyan.zhang@unisoc.com, jonathanh@nvidia.com, adrian.hunter@intel.com, ulf.hansson@linaro.org, anrao@nvidia.com, devicetree@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mmc@vger.kernel.org List-Id: devicetree@vger.kernel.org --TakKZr9L6Hm6aLOc Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Jan 22, 2019 at 11:56:32AM -0800, Sowjanya Komatineni wrote: > Below are the supported DMA types in Host Control1 Register > with Version 4 enable > b'00 - SDMA > b'01 - Not Used > b'10 - ADMA2 > b'11 - ADMA2 or ADMA3 >=20 > ADMA3 uses Command Descriptor to issue an SD command. > A multi-block data transfer is performed by using a pair of CMD > descriptor and ADMA2 descriptor. >=20 > ADMA3 performs multiple of multi-block data transfer by using > Integrated Descriptor which is more suitable for Command Queuing > to fetch both Command and Transfer descriptors. >=20 > Host Capabilities register indiactes the supports of ADMA3 DMA. >=20 > Signed-off-by: Sowjanya Komatineni > --- > [V10]: Changes are same as V9 except this series has SDHCI core changes > into seperate patch=20 >=20 > drivers/mmc/host/sdhci.c | 9 ++++++++- > drivers/mmc/host/sdhci.h | 2 ++ > 2 files changed, 10 insertions(+), 1 deletion(-) Reviewed-by: Thierry Reding --TakKZr9L6Hm6aLOc Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEEiOrDCAFJzPfAjcif3SOs138+s6EFAlxIMLQACgkQ3SOs138+ s6EavhAAudFsfnYNJZTEr8sMOY/ebBedQ38LJY9rBEVW8M4STWhN6P3wpbFT/nF0 6K42ZkR0sogXsKpvmX+OrLE6nEK3rm/4jQnAa1VWgDXyPFb7up0oevMQ2vQ7Z6aM D1wJ/swiIfptDmI8jOAZg79giOHsSLCJ7LA4kq91nD/PZI7RCHUNpd6DIOd4nB3a pKE7XEOT8h9/voL9kt5KZuEPSo4rTnRssQvxn/e+63ovzeU9TljYpJ4vCRxC+EPT ClUDSbHzK/0FeAIG0mTR32v3OHlssrOFUDD1To6b48hVP7o5/WHwG+olkYTR2RhS GYDooX41OFuBFF7g491fYcJpXdoiCO0XdTqrLhPW0Oooe64DpFX/BHqA6yrotvBW nQ0L7mzhfTFXSlfXo4NcnnTPDvCw7dbKmv6SaS75p5MiJ6t4vGdSj+ZGJv3LntVw cGpPJ4y6MDZ6LCrEpZm5eV514tHezPMklY2DVKRJKPOqZF03mS06RQlSuNNbtpN2 mJFdaL68fP41jY1+jUIdSLzbCIeX1uieHgLo9/VxbYHoqmWaWa0edTIhyvsUarHC cypLR6z649URlZLGgGf4lO9C14N6l5foFpPU5ucxvoxfpHpKiKXmYYvgsBy0buuW v9HLYwxiIcMzBmWbEh2cRfcsUGmATAGy0riLVcae2FL90L745q4= =FPU6 -----END PGP SIGNATURE----- --TakKZr9L6Hm6aLOc--