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[109.252.90.13]) by smtp.gmail.com with ESMTPSA id q15-v6sm411541ljg.62.2018.07.26.16.22.32 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 26 Jul 2018 16:22:32 -0700 (PDT) From: Dmitry Osipenko To: Greg Kroah-Hartman , "Rafael J. Wysocki" , Thierry Reding , Jonathan Hunter , Mikko Perttunen , Rob Herring , Frank Rowand , Ben Skeggs , Russell King , Catalin Marinas , Will Deacon , Joerg Roedel , Nicolas Chauvet Cc: devicetree@vger.kernel.org, nouveau@lists.freedesktop.org, iommu@lists.linux-foundation.org, dri-devel@lists.freedesktop.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [RFC PATCH v1 3/6] drm/tegra: Avoid implicit DMA backing with IOMMU Date: Fri, 27 Jul 2018 02:16:21 +0300 Message-Id: <20180726231624.21084-4-digetx@gmail.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20180726231624.21084-1-digetx@gmail.com> References: <20180726231624.21084-1-digetx@gmail.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Tegra DRM manages IOMMU by itself, backing DMA with IOMMU by the drivers core breaks the Tegra driver. Signed-off-by: Dmitry Osipenko --- drivers/gpu/drm/tegra/dc.c | 1 + drivers/gpu/drm/tegra/gr2d.c | 1 + drivers/gpu/drm/tegra/gr3d.c | 1 + drivers/gpu/drm/tegra/vic.c | 1 + 4 files changed, 4 insertions(+) diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c index eb9bb83f8f5d..4827770939e3 100644 --- a/drivers/gpu/drm/tegra/dc.c +++ b/drivers/gpu/drm/tegra/dc.c @@ -2675,6 +2675,7 @@ static const struct dev_pm_ops tegra_dc_pm_ops = { struct platform_driver tegra_dc_driver = { .driver = { .name = "tegra-dc", + .no_implicit_iommu = true, .of_match_table = tegra_dc_of_match, .pm = &tegra_dc_pm_ops, }, diff --git a/drivers/gpu/drm/tegra/gr2d.c b/drivers/gpu/drm/tegra/gr2d.c index 3c5503f1bf3d..e427585ef5cc 100644 --- a/drivers/gpu/drm/tegra/gr2d.c +++ b/drivers/gpu/drm/tegra/gr2d.c @@ -327,6 +327,7 @@ static int gr2d_remove(struct platform_device *pdev) struct platform_driver tegra_gr2d_driver = { .driver = { .name = "tegra-gr2d", + .no_implicit_iommu = true, .of_match_table = gr2d_match, }, .probe = gr2d_probe, diff --git a/drivers/gpu/drm/tegra/gr3d.c b/drivers/gpu/drm/tegra/gr3d.c index 651e697ccbba..f54710c36afb 100644 --- a/drivers/gpu/drm/tegra/gr3d.c +++ b/drivers/gpu/drm/tegra/gr3d.c @@ -481,6 +481,7 @@ static int gr3d_remove(struct platform_device *pdev) struct platform_driver tegra_gr3d_driver = { .driver = { .name = "tegra-gr3d", + .no_implicit_iommu = true, .of_match_table = tegra_gr3d_match, }, .probe = gr3d_probe, diff --git a/drivers/gpu/drm/tegra/vic.c b/drivers/gpu/drm/tegra/vic.c index 0e6642bb8524..4ecc466ee490 100644 --- a/drivers/gpu/drm/tegra/vic.c +++ b/drivers/gpu/drm/tegra/vic.c @@ -402,6 +402,7 @@ static const struct dev_pm_ops vic_pm_ops = { struct platform_driver tegra_vic_driver = { .driver = { .name = "tegra-vic", + .no_implicit_iommu = true, .of_match_table = vic_match, .pm = &vic_pm_ops }, -- 2.18.0