From patchwork Sun Nov 14 22:47:30 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 12618477 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 40FCDC433FE for ; Sun, 14 Nov 2021 22:48:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1C76A60C4A for ; Sun, 14 Nov 2021 22:48:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234172AbhKNWvg (ORCPT ); Sun, 14 Nov 2021 17:51:36 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43376 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231496AbhKNWvX (ORCPT ); Sun, 14 Nov 2021 17:51:23 -0500 Received: from mail-lj1-x233.google.com (mail-lj1-x233.google.com [IPv6:2a00:1450:4864:20::233]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E4CC8C061766; Sun, 14 Nov 2021 14:48:28 -0800 (PST) Received: by mail-lj1-x233.google.com with SMTP id 207so31318060ljf.10; Sun, 14 Nov 2021 14:48:28 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=yHGzOys1VwrqOWwxAdMDnBSuseyJ+I3mvne9462m4Wc=; b=kunQ9WI6b4U60DFOUoFQm2z+CNUQPIsJBRzfE+5MBBVv43wFGCe5vzTNvPGMMWAk4S KdxujxEhV8fQHEn0ruMUx/IctNiE7DkPmHIB2tEBycJCGXXd88j2gl5XjMGYtEcMRxBV oL3PkcmX+GLY3JaebUwaRyDRMxFty6E8QkhyTXVg30r7DViM2DSh+rPwM+2L166gwweX 4um7k+IIYZGrbrXfa8awb2RwHAu+VPZGRwBPmrd8NKUUceQTDvC/KWGRHuwbGKtH5U+M JAhEvp4/fHAV94KEjKxWmbmKdUo0EMnR6gwCI94de0jDfkwwWqszWTlb45oVSA/DPlvR ASGA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=yHGzOys1VwrqOWwxAdMDnBSuseyJ+I3mvne9462m4Wc=; b=hQvPz5mVyG+Wrru26heDFiHGhozn00woZfSr43CJdCuOn7KmHuzPCzJ/TEY4e6Km7f 0TcvQbrHtpEoSv9mrl8ntJ3/tzhZigmVSK8fgia0/Sxm4dg1QxL2wKNO8J4Muqa02niK A7H/aq+xRUEWPVsGgRynLij2FkFMVjbYP71yMCygwl0Ex3W6drr0I2QXMOBUNAJH7da0 0SLOHwwLDQ7Xbl1RBTJYu6dvwbjkjdoolYxr9UJZ29F4Pxt8PGMnEn9pfIjNH4lN2C00 eyDp4770nkKeY50kklwbLVWxOwZ5Q04y1HkxnR9Zp5mXc+cdQza+fvd6C+p8+Mb0CHAu Nn0g== X-Gm-Message-State: AOAM530WuxAYuj1zbIxib2x7xQlkIXGLPmg9qD+jOqJQ5cyn+auZDE8I xqPB0GkIgTMMfDEE+6RSGHU= X-Google-Smtp-Source: ABdhPJwPrQW6OU37D3o3Ayti5f11fIVA/8tY1OuPhnjTwnQq0M7CxX8/SJpeEJeMLaw/9xNNbTUiyQ== X-Received: by 2002:a2e:a706:: with SMTP id s6mr34237631lje.370.1636930107272; Sun, 14 Nov 2021 14:48:27 -0800 (PST) Received: from localhost.localdomain (46-138-46-211.dynamic.spd-mgts.ru. [46.138.46.211]) by smtp.gmail.com with ESMTPSA id h1sm1228591lfu.277.2021.11.14.14.48.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 14 Nov 2021 14:48:27 -0800 (PST) From: Dmitry Osipenko To: Thierry Reding , Jonathan Hunter , Mauro Carvalho Chehab , Greg Kroah-Hartman , Anton Bambura , Hans Verkuil Cc: linux-media@vger.kernel.org, linux-staging@lists.linux.dev, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 1/3] media: staging: tegra-vde: Support reference picture marking Date: Mon, 15 Nov 2021 01:47:30 +0300 Message-Id: <20211114224732.11550-2-digetx@gmail.com> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211114224732.11550-1-digetx@gmail.com> References: <20211114224732.11550-1-digetx@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org From: Thierry Reding Tegra114 and Tegra124 support reference picture marking, which will cause BSEV to write picture marking data to SDRAM. Make sure there is a valid destination address for that data to avoid error messages from the memory controller. [digetx@gmail.com: added BO support and moved secure BO allocation to kernel] Tested-by: Anton Bambura # T114 ASUS TF701T Signed-off-by: Thierry Reding Co-developed-by: Dmitry Osipenko Signed-off-by: Dmitry Osipenko --- drivers/staging/media/tegra-vde/vde.c | 124 +++++++++++++++++++++++++- drivers/staging/media/tegra-vde/vde.h | 18 ++++ 2 files changed, 141 insertions(+), 1 deletion(-) diff --git a/drivers/staging/media/tegra-vde/vde.c b/drivers/staging/media/tegra-vde/vde.c index 859f60a70904..81f3e9e7e4d6 100644 --- a/drivers/staging/media/tegra-vde/vde.c +++ b/drivers/staging/media/tegra-vde/vde.c @@ -85,6 +85,96 @@ static int tegra_vde_wait_mbe(struct tegra_vde *vde) (tmp >= 0x10), 1, 100); } +static int tegra_vde_alloc_bo(struct tegra_vde *vde, + struct tegra_vde_bo **ret_bo, + enum dma_data_direction dma_dir, + size_t size) +{ + struct device *dev = vde->miscdev.parent; + struct tegra_vde_bo *bo; + int err; + + bo = kzalloc(sizeof(*bo), GFP_KERNEL); + if (!bo) + return -ENOMEM; + + bo->vde = vde; + bo->size = size; + bo->dma_dir = dma_dir; + bo->dma_attrs = DMA_ATTR_WRITE_COMBINE | + DMA_ATTR_NO_KERNEL_MAPPING; + + if (!vde->domain) + bo->dma_attrs |= DMA_ATTR_FORCE_CONTIGUOUS; + + bo->dma_cookie = dma_alloc_attrs(dev, bo->size, &bo->dma_handle, + GFP_KERNEL, bo->dma_attrs); + if (!bo->dma_cookie) { + dev_err(dev, "Failed to allocate DMA buffer of size: %zu\n", + bo->size); + err = -ENOMEM; + goto free_bo; + } + + err = dma_get_sgtable_attrs(dev, &bo->sgt, bo->dma_cookie, + bo->dma_handle, bo->size, bo->dma_attrs); + if (err) { + dev_err(dev, "Failed to get DMA buffer SG table: %d\n", err); + goto free_attrs; + } + + err = dma_map_sgtable(dev, &bo->sgt, bo->dma_dir, bo->dma_attrs); + if (err) { + dev_err(dev, "Failed to map DMA buffer SG table: %d\n", err); + goto free_table; + } + + if (vde->domain) { + err = tegra_vde_iommu_map(vde, &bo->sgt, &bo->iova, bo->size); + if (err) { + dev_err(dev, "Failed to map DMA buffer IOVA: %d\n", err); + goto unmap_sgtable; + } + + bo->dma_addr = iova_dma_addr(&vde->iova, bo->iova); + } else { + bo->dma_addr = sg_dma_address(bo->sgt.sgl); + } + + *ret_bo = bo; + + return 0; + +unmap_sgtable: + dma_unmap_sgtable(dev, &bo->sgt, bo->dma_dir, bo->dma_attrs); +free_table: + sg_free_table(&bo->sgt); +free_attrs: + dma_free_attrs(dev, bo->size, bo->dma_cookie, bo->dma_handle, + bo->dma_attrs); +free_bo: + kfree(bo); + + return err; +} + +static void tegra_vde_free_bo(struct tegra_vde_bo *bo) +{ + struct tegra_vde *vde = bo->vde; + struct device *dev = vde->miscdev.parent; + + if (vde->domain) + tegra_vde_iommu_unmap(vde, bo->iova); + + dma_unmap_sgtable(dev, &bo->sgt, bo->dma_dir, bo->dma_attrs); + + sg_free_table(&bo->sgt); + + dma_free_attrs(dev, bo->size, bo->dma_cookie, bo->dma_handle, + bo->dma_attrs); + kfree(bo); +} + static int tegra_vde_setup_mbe_frame_idx(struct tegra_vde *vde, unsigned int refs_nb, bool setup_refs) @@ -425,6 +515,9 @@ static int tegra_vde_setup_hw_context(struct tegra_vde *vde, tegra_vde_writel(vde, bitstream_data_addr, vde->sxe, 0x6C); + if (vde->soc->supports_ref_pic_marking) + tegra_vde_writel(vde, vde->secure_bo->dma_addr, vde->sxe, 0x7c); + value = 0x10000005; value |= ctx->pic_width_in_mbs << 11; value |= ctx->pic_height_in_mbs << 3; @@ -994,6 +1087,8 @@ static int tegra_vde_probe(struct platform_device *pdev) platform_set_drvdata(pdev, vde); + vde->soc = of_device_get_match_data(&pdev->dev); + vde->sxe = devm_platform_ioremap_resource_byname(pdev, "sxe"); if (IS_ERR(vde->sxe)) return PTR_ERR(vde->sxe); @@ -1119,6 +1214,12 @@ static int tegra_vde_probe(struct platform_device *pdev) pm_runtime_put(dev); + err = tegra_vde_alloc_bo(vde, &vde->secure_bo, DMA_FROM_DEVICE, 4096); + if (err) { + dev_err(dev, "Failed to allocate secure BO: %d\n", err); + goto err_pm_runtime; + } + return 0; err_pm_runtime: @@ -1142,6 +1243,8 @@ static int tegra_vde_remove(struct platform_device *pdev) struct tegra_vde *vde = platform_get_drvdata(pdev); struct device *dev = &pdev->dev; + tegra_vde_free_bo(vde->secure_bo); + /* * As it increments RPM usage_count even on errors, we don't need to * check the returned code here. @@ -1214,8 +1317,27 @@ static const struct dev_pm_ops tegra_vde_pm_ops = { tegra_vde_pm_resume) }; +static const struct tegra_vde_soc tegra124_vde_soc = { + .supports_ref_pic_marking = true, +}; + +static const struct tegra_vde_soc tegra114_vde_soc = { + .supports_ref_pic_marking = true, +}; + +static const struct tegra_vde_soc tegra30_vde_soc = { + .supports_ref_pic_marking = false, +}; + +static const struct tegra_vde_soc tegra20_vde_soc = { + .supports_ref_pic_marking = false, +}; + static const struct of_device_id tegra_vde_of_match[] = { - { .compatible = "nvidia,tegra20-vde", }, + { .compatible = "nvidia,tegra124-vde", .data = &tegra124_vde_soc }, + { .compatible = "nvidia,tegra114-vde", .data = &tegra114_vde_soc }, + { .compatible = "nvidia,tegra30-vde", .data = &tegra30_vde_soc }, + { .compatible = "nvidia,tegra20-vde", .data = &tegra20_vde_soc }, { }, }; MODULE_DEVICE_TABLE(of, tegra_vde_of_match); diff --git a/drivers/staging/media/tegra-vde/vde.h b/drivers/staging/media/tegra-vde/vde.h index 5561291b0c88..bbd42b8d9991 100644 --- a/drivers/staging/media/tegra-vde/vde.h +++ b/drivers/staging/media/tegra-vde/vde.h @@ -24,6 +24,22 @@ struct iommu_domain; struct reset_control; struct dma_buf_attachment; +struct tegra_vde_soc { + bool supports_ref_pic_marking; +}; + +struct tegra_vde_bo { + struct iova *iova; + struct sg_table sgt; + struct tegra_vde *vde; + enum dma_data_direction dma_dir; + unsigned long dma_attrs; + dma_addr_t dma_handle; + dma_addr_t dma_addr; + void *dma_cookie; + size_t size; +}; + struct tegra_vde { void __iomem *sxe; void __iomem *bsev; @@ -48,6 +64,8 @@ struct tegra_vde { struct iova_domain iova; struct iova *iova_resv_static_addresses; struct iova *iova_resv_last_page; + const struct tegra_vde_soc *soc; + struct tegra_vde_bo *secure_bo; dma_addr_t iram_lists_addr; u32 *iram; }; From patchwork Sun Nov 14 22:47:31 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 12618481 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AD798C433F5 for ; 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[46.138.46.211]) by smtp.gmail.com with ESMTPSA id h1sm1228591lfu.277.2021.11.14.14.48.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 14 Nov 2021 14:48:27 -0800 (PST) From: Dmitry Osipenko To: Thierry Reding , Jonathan Hunter , Mauro Carvalho Chehab , Greg Kroah-Hartman , Anton Bambura , Hans Verkuil Cc: linux-media@vger.kernel.org, linux-staging@lists.linux.dev, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 2/3] media: staging: tegra-vde: Properly mark invalid entries Date: Mon, 15 Nov 2021 01:47:31 +0300 Message-Id: <20211114224732.11550-3-digetx@gmail.com> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211114224732.11550-1-digetx@gmail.com> References: <20211114224732.11550-1-digetx@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org From: Thierry Reding Entries in the reference picture list are marked as invalid by setting the frame ID to 0x3f. Signed-off-by: Thierry Reding Signed-off-by: Dmitry Osipenko --- drivers/staging/media/tegra-vde/vde.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/staging/media/tegra-vde/vde.c b/drivers/staging/media/tegra-vde/vde.c index 81f3e9e7e4d6..f4f65eb78d44 100644 --- a/drivers/staging/media/tegra-vde/vde.c +++ b/drivers/staging/media/tegra-vde/vde.c @@ -340,7 +340,7 @@ static void tegra_vde_setup_iram_tables(struct tegra_vde *vde, value |= frame->frame_num; } else { aux_addr = 0x6ADEAD00; - value = 0; + value = 0x3f; } tegra_vde_setup_iram_entry(vde, 0, i, value, aux_addr); From patchwork Sun Nov 14 22:47:32 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 12618479 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1BB89C433EF for ; Sun, 14 Nov 2021 22:49:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 00DEA61105 for ; Sun, 14 Nov 2021 22:49:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234667AbhKNWvj (ORCPT ); Sun, 14 Nov 2021 17:51:39 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43388 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231877AbhKNWvZ (ORCPT ); Sun, 14 Nov 2021 17:51:25 -0500 Received: from mail-lf1-x135.google.com (mail-lf1-x135.google.com [IPv6:2a00:1450:4864:20::135]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 477E6C0613B9; Sun, 14 Nov 2021 14:48:30 -0800 (PST) Received: by mail-lf1-x135.google.com with SMTP id b40so38353792lfv.10; Sun, 14 Nov 2021 14:48:30 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=ImcZoW2Pqa7ZRY/8PEMeXuQQ0A4lrgRe4vr/rypxpxM=; b=hDm+hWyRQI66NSlBlRF3pXrbBPomci2YplEsAU3wgIVCOYTv2uClgrNw+wbic17+kj 5xo5effVDq+wZ6ZhysDJ4vNNsPnpA/s//WRVrlMWai9sVeub2ulsYWS0r+82mR/wf388 KvbOJ9ONvzJ4n6YB0ceRQPaV3jvfUD3Ocw4qJRPwkP1acynqV+5+Wv7E3NnmLmsLCevC TPZQYwPA9HbP+cQ7zCt/iYC3GCKMhkPKYPVVIKJKjyuyegSbTnLYvneEB9cRh2L9M/eH 3uYkjZg9zKxRGabyFrFpfPd8TuH0B/usMxmweDYKvWy1I1a7Jx/US9KqH2uzGfLRSsdz a7JA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=ImcZoW2Pqa7ZRY/8PEMeXuQQ0A4lrgRe4vr/rypxpxM=; b=2mMZRTSIIyQOPz/OZNRtxBRVhS5/58wmOanyMz9mY2/khP3GFmelL7AfjG3vBaSQWb 2qpm3DHMQiuQl9fIyen0JjUcliODOnx9cGidzbLSaFKg3fiqgA3c9uslGdo/MxFOfgpM yAnENjukzrIsy/3PEKCXPWr9lsHWNF9bLEDp0cbqWDJDMSM6QjPParVP+OhXuEtP0cNq ZgntTFsNZLUhka+P1nM0LVVz7X4T4YEaQBmqD8lZih4uuCdnnx00L35Lt5SiukW/f9Lg 5Y6wpJM/eJ1QzneWii5FKI/jHRjn9WXonLwdMjwiSEN/U4AoPnUmvHWqrBe2Kqtek4t4 /J8w== X-Gm-Message-State: AOAM531xSXJwYek+7QQALn4jGaewKF1cKuZfvpgvUiUcVw58Rb7vNXPt A3DxgdT5AUSb00y9iw9Ph4k= X-Google-Smtp-Source: ABdhPJza0kexM3zW71JVQc6l5KmuNpf+eeMnHcB7U4RkNa3k2wzk30jArYTMgkgYnWxAnz+gAuXQ2w== X-Received: by 2002:ac2:4907:: with SMTP id n7mr13887808lfi.86.1636930108582; Sun, 14 Nov 2021 14:48:28 -0800 (PST) Received: from localhost.localdomain (46-138-46-211.dynamic.spd-mgts.ru. [46.138.46.211]) by smtp.gmail.com with ESMTPSA id h1sm1228591lfu.277.2021.11.14.14.48.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 14 Nov 2021 14:48:28 -0800 (PST) From: Dmitry Osipenko To: Thierry Reding , Jonathan Hunter , Mauro Carvalho Chehab , Greg Kroah-Hartman , Anton Bambura , Hans Verkuil Cc: linux-media@vger.kernel.org, linux-staging@lists.linux.dev, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 3/3] media: staging: tegra-vde: Reorder misc device registration Date: Mon, 15 Nov 2021 01:47:32 +0300 Message-Id: <20211114224732.11550-4-digetx@gmail.com> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211114224732.11550-1-digetx@gmail.com> References: <20211114224732.11550-1-digetx@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org Register misc device in the end of driver's probing since device should become visible to userspace once driver is fully prepared. Do the opposite in case of driver removal. This is a minor improvement that doesn't solve any problem, but makes code more consistent. Signed-off-by: Dmitry Osipenko --- drivers/staging/media/tegra-vde/vde.c | 21 ++++++++++----------- 1 file changed, 10 insertions(+), 11 deletions(-) diff --git a/drivers/staging/media/tegra-vde/vde.c b/drivers/staging/media/tegra-vde/vde.c index f4f65eb78d44..a8f1a024c343 100644 --- a/drivers/staging/media/tegra-vde/vde.c +++ b/drivers/staging/media/tegra-vde/vde.c @@ -1193,12 +1193,6 @@ static int tegra_vde_probe(struct platform_device *pdev) goto err_gen_free; } - err = misc_register(&vde->miscdev); - if (err) { - dev_err(dev, "Failed to register misc device: %d\n", err); - goto err_deinit_iommu; - } - pm_runtime_enable(dev); pm_runtime_use_autosuspend(dev); pm_runtime_set_autosuspend_delay(dev, 300); @@ -1220,15 +1214,20 @@ static int tegra_vde_probe(struct platform_device *pdev) goto err_pm_runtime; } + err = misc_register(&vde->miscdev); + if (err) { + dev_err(dev, "Failed to register misc device: %d\n", err); + goto err_free_secure_bo; + } + return 0; +err_free_secure_bo: + tegra_vde_free_bo(vde->secure_bo); err_pm_runtime: - misc_deregister(&vde->miscdev); - pm_runtime_dont_use_autosuspend(dev); pm_runtime_disable(dev); -err_deinit_iommu: tegra_vde_iommu_deinit(vde); err_gen_free: @@ -1243,6 +1242,8 @@ static int tegra_vde_remove(struct platform_device *pdev) struct tegra_vde *vde = platform_get_drvdata(pdev); struct device *dev = &pdev->dev; + misc_deregister(&vde->miscdev); + tegra_vde_free_bo(vde->secure_bo); /* @@ -1261,8 +1262,6 @@ static int tegra_vde_remove(struct platform_device *pdev) pm_runtime_put_noidle(dev); clk_disable_unprepare(vde->clk); - misc_deregister(&vde->miscdev); - tegra_vde_dmabuf_cache_unmap_all(vde); tegra_vde_iommu_deinit(vde);