From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 0168930EF9B; Mon, 13 Oct 2025 15:34:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760369669; cv=none; b=oNu8HfqVGHGEDIExoefRE3OYrF4pd7FHYFXtWDf2oqMCqjgpHqx0nc3+QLMm71S7BWg7z+qK+l6BrHAS0Nqx4pCDTaabLsxWqq+FCCeFZlsmnWh0Yl37QcOKKdxICxuj7zLSUzVZgisc9gcUBaA0yk1llJA57kYCn/bY939vfms= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760369669; c=relaxed/simple; bh=4Mmd0n/8k09Yup6TStkwKgQbKwu9n/7cYGKJNHd/Eow=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=OQ9nLWjEjGd7QdW22N6/Q+EG7XvLFLRVkUTCIB6nN0dRSNAjRyRTG+1uIsXqxqUuLjTSxvzJT5NZiunkKEtnRDMs741qbBe22yJfPeY/UTQxwePeJrqTxv5LcwIkmpa9mHrM5C8KWNDz+w9zSvE4ifCGuZ5k0u5FJyo3PQlOWB4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=r4zjBFdZ; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="r4zjBFdZ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7BFE9C4CEFE; Mon, 13 Oct 2025 15:34:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1760369668; bh=4Mmd0n/8k09Yup6TStkwKgQbKwu9n/7cYGKJNHd/Eow=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=r4zjBFdZ1l2iitirDKNSzixwq2/AQpUuyYKqX92WenR+Mv/I4kmX9bFa8mg7wFZmY WZx0S/V5+Xzg3uVoLhQhRQ//8S06EPvd304f+WgIi+Yk0p/Soz6BcxXRGnoX4vSJdK vkYWVybbfVpauBd2ec8E7tcpStCenYWT9P1JvC0k= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Dmitry Baryshkov , Rob Clark , Sasha Levin Subject: [PATCH 6.17 327/563] drm/msm/mdp4: stop supporting no-IOMMU configuration Date: Mon, 13 Oct 2025 16:43:08 +0200 Message-ID: <20251013144423.108559617@linuxfoundation.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251013144411.274874080@linuxfoundation.org> References: <20251013144411.274874080@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.17-stable review patch. If anyone has any objections, please let me know. ------------------ From: Dmitry Baryshkov [ Upstream commit cc64568b522b64fb8f8c607da9eb4e2d9f72d0cf ] With the switch to GPUVM the msm driver no longer supports the no-IOMMU configurations (even without the actual GPU). Return an error in case we face the lack of the IOMMU for an MDP4 device. Fixes: 111fdd2198e6 ("drm/msm: drm_gpuvm conversion") Signed-off-by: Dmitry Baryshkov Patchwork: https://patchwork.freedesktop.org/patch/672557/ Signed-off-by: Rob Clark Signed-off-by: Sasha Levin --- drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c b/drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c index 0952c7f18abdc..4d1ea9b261917 100644 --- a/drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c +++ b/drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c @@ -463,9 +463,9 @@ static int mdp4_kms_init(struct drm_device *dev) ret = PTR_ERR(mmu); goto fail; } else if (!mmu) { - DRM_DEV_INFO(dev->dev, "no iommu, fallback to phys " - "contig buffers for scanout\n"); - vm = NULL; + DRM_DEV_INFO(dev->dev, "no IOMMU, bailing out\n"); + ret = -ENODEV; + goto fail; } else { vm = msm_gem_vm_create(dev, mmu, "mdp4", 0x1000, 0x100000000 - 0x1000, -- 2.51.0