From nobody Sat Feb 7 05:01:34 2026 Received: from sender4-pp-f112.zoho.com (sender4-pp-f112.zoho.com [136.143.188.112]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 956E52C11C0 for ; Wed, 22 Oct 2025 16:21:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=pass smtp.client-ip=136.143.188.112 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761150093; cv=pass; b=hs+Zlz+dR463AWBIkiJWcnZWNkmgELwuwlhbdDGy4j6dpHHESUgxWx351Mw/2aEGn4VPlbXpWsNyGrITGm1CXEhwkThuT54MlLEq0O5HZSE5T1vU6RaxNfVta3X/RYLwcaAJjSTBBsLiCqZWNfg3LoqBsASHDt1fX8OKF2Fh+QQ= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761150093; c=relaxed/simple; bh=Xg/qPn711w8c2isVa6nPEL/1BZ8WZ+eksmBR7k5SC9U=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=M3vcLaEWz4QLquq7Jsok8Jalx04IPW5ukw/64tjDT0UpRcYGoGCN6h+ukJprk5lMMZv8CSKw6HD5M/5GMKq3iLFQCw+CjQIuz8W/24RjRTGydxq6kMOII0eY0kqRMgKjyot82OfgeiNDpwtqr8tncMZnCzJuGddPfyNRiBJKmYw= ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com; spf=pass smtp.mailfrom=collabora.com; dkim=pass (1024-bit key) header.d=collabora.com header.i=dmitry.osipenko@collabora.com header.b=HjoYVDdP; arc=pass smtp.client-ip=136.143.188.112 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=collabora.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=collabora.com header.i=dmitry.osipenko@collabora.com header.b="HjoYVDdP" ARC-Seal: i=1; a=rsa-sha256; t=1761150069; cv=none; d=zohomail.com; s=zohoarc; b=lGCaflefZf9vW0sZUzl5R9DP8UEulwgyXUiaW+glHfUz31zKUpTCTtzJhn7nKRV0XYHMe7hwwkqRlSa6DNzkt2GWlia9O4YhjkvqdkVVK26uawqepgwLMmFOxxCjLnYK2zAf72kvwsYU66EU6Zi/alQaHMmDkjkIijxYYPMrAGU= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1761150069; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:MIME-Version:Message-ID:Subject:Subject:To:To:Message-Id:Reply-To; bh=FdcrSneWicl1pfGMcZk6PTeqOTBE1QoowN6eLnXOcgU=; b=H/uwlob0aAvM70DEBoKO/53Mu77vNhN7nV3svwqA6OZXj1Q6xieeknEwj66tK4ofB4Xf9p4A4IdPW5bZbAQvfXfcsKcAEkxBaitzg6enV8Di4F5cfOMwui4ZPwCgKiQyceNyTS3xXWS7PC/vy2LSLVcG9efvqFg04Lf/pbR8Bfs= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=collabora.com; spf=pass smtp.mailfrom=dmitry.osipenko@collabora.com; dmarc=pass header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1761150068; s=zohomail; d=collabora.com; i=dmitry.osipenko@collabora.com; h=From:From:To:To:Cc:Cc:Subject:Subject:Date:Date:Message-ID:MIME-Version:Content-Transfer-Encoding:Message-Id:Reply-To; bh=FdcrSneWicl1pfGMcZk6PTeqOTBE1QoowN6eLnXOcgU=; b=HjoYVDdPhe2UO4MEseYlCzsf5PLSkSqmQ3FBRRpzmXJYnVSgD+EsF1o8xOmD2lBO QQW8K+SkhZYDmAJBDqyWPe+4t7rnakJ4ZJOOGeB85q9hxtMI7pc4+4efkg7d7kQPxYi 5PV1jfVkEizK87x9AmLdRXkEczkClnEiczdwOHWE= Received: by mx.zohomail.com with SMTPS id 1761150066573669.259808258432; Wed, 22 Oct 2025 09:21:06 -0700 (PDT) From: Dmitry Osipenko To: Sandy Huang , =?UTF-8?q?Heiko=20St=C3=BCbner?= , Andy Yan , Robin Murphy , Sebastian Reichel , Daniel Stone Cc: kernel@collabora.com, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org Subject: [PATCH v1] drm/rockchip: Set VOP for the DRM DMA device Date: Wed, 22 Oct 2025 19:19:48 +0300 Message-ID: <20251022161948.199731-1-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.51.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZohoMailClient: External Content-Type: text/plain; charset="utf-8" Use VOP for DMA operations performed by DRM core. Rockchip DRM driver is backed by a virtual device that isn't IOMMU-capable, while VOP is the actual display controller device backed by IOMMU. Fixes "swiotlb buffer is full" warning messages originated from GEM prime code paths. Note, that backporting is non-trivial as this depends on 143ec8d3f9396 ("drm/prime: Support dedicated DMA device for dma-buf imports"), which landed in v6.16 and 421be3ee36a4 ("drm/rockchip: Refactor IOMMU initialisation"), which landed in v5.19. Reported-by: Daniel Stone Fixes: 2048e3286f34 ("drm: rockchip: Add basic drm driver") Cc: stable@vger.kernel.org # v6.16+ Reviewed-by: Sebastian Reichel Signed-off-by: Dmitry Osipenko Tested-by: Cristian Ciocaltea --- drivers/gpu/drm/rockchip/rockchip_drm_drv.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/= rockchip/rockchip_drm_drv.c index eb77bde9f628..e693160e9b7f 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c @@ -96,6 +96,9 @@ void rockchip_drm_dma_init_device(struct drm_device *drm_= dev, private->iommu_dev =3D ERR_PTR(-ENODEV); else if (!private->iommu_dev) private->iommu_dev =3D dev; + + if (!IS_ERR(private->iommu_dev)) + drm_dev_set_dma_dev(drm_dev, private->iommu_dev); } =20 static int rockchip_drm_init_iommu(struct drm_device *drm_dev) --=20 2.51.0