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[217.229.27.143]) by smtp.gmail.com with ESMTPSA id g4-v6sm12296732wrq.32.2018.07.09.01.32.41 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Mon, 09 Jul 2018 01:32:41 -0700 (PDT) Date: Mon, 9 Jul 2018 10:32:41 +0200 From: Thierry Reding To: Dmitry Osipenko Cc: Mikko Perttunen , linux-tegra@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v1] gpu: host1x: Skip IOMMU initialization if firewall is enabled Message-ID: <20180709083241.GB13963@ulmo> References: <20180519010710.11693-1-digetx@gmail.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="Bn2rw/3z4jIqBvZU" Content-Disposition: inline In-Reply-To: <20180519010710.11693-1-digetx@gmail.com> 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 --Bn2rw/3z4jIqBvZU Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sat, May 19, 2018 at 04:07:10AM +0300, Dmitry Osipenko wrote: > Host1x's CDMA can't access the command buffers if IOMMU and Host1x > firewall are enabled in the kernels config because firewall doesn't map > the copied buffer into IOVA space. Fix this by skipping IOMMU > initialization if firewall is enabled as firewall merges sparse cmdbufs > into a single contiguous buffer and hence IOMMU isn't needed in this case. >=20 > Signed-off-by: Dmitry Osipenko > --- > drivers/gpu/host1x/dev.c | 3 +++ > 1 file changed, 3 insertions(+) Applied to drm/tegra/fixes, thanks. 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