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[2001:14ba:a0c3:3a00:264b:feff:fe8b:be8a]) by smtp.gmail.com with ESMTPSA id 38308e7fff4ca-337f5032df6sm9373431fa.39.2025.09.03.03.51.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 03 Sep 2025 03:51:52 -0700 (PDT) From: Dmitry Baryshkov Date: Wed, 03 Sep 2025 13:51:49 +0300 Subject: [PATCH v2 1/4] drm/msm/mdp4: stop supporting no-IOMMU configuration Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250903-msm-no-iommu-v2-1-993016250104@oss.qualcomm.com> References: <20250903-msm-no-iommu-v2-0-993016250104@oss.qualcomm.com> In-Reply-To: <20250903-msm-no-iommu-v2-0-993016250104@oss.qualcomm.com> To: Rob Clark , Dmitry Baryshkov , Abhinav Kumar , Jessica Zhang , Sean Paul , Marijn Suijten , David Airlie , Simona Vetter , Antonino Maniscalco , Konrad Dybcio Cc: linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1164; i=dmitry.baryshkov@oss.qualcomm.com; h=from:subject:message-id; bh=DOxzGa5ln47R7OKiLfYSQ6PXX1PmidXuqgERtNEvWGQ=; b=owEBbQGS/pANAwAKAYs8ij4CKSjVAcsmYgBouB3GCYkst6B7Vxs59unZZ9OWKVDoBqiuhqLC0 Ad4ZcOrmJSJATMEAAEKAB0WIQRMcISVXLJjVvC4lX+LPIo+Aiko1QUCaLgdxgAKCRCLPIo+Aiko 1ZcgB/wIRfe3wD4L2wCQMTy+OxGPZlV6SmutRvWdRPLCSQp30ykvoaG1Ed+6wQruZao1GvSijCJ orcOb6USxUZZxw63Mfp1G+ybUU9Tj3tfzkG6fKuQSGwc6GyAwW8583XlCql0de54kaT3+Z+oYN0 okuAymJbOPK6yEBncCgmM5y6SOrv9LsQyd2VcJYYZLAXt9cv3ojsX8+Y1SZ8BKMp6Vcaauelz7M EW1dHqy73TPNShxN5UdgVrL2iH6FND7OHToV5llWfafKG+xzR/L8NsgiyfSK+lL7JIQ/YlQM5xr ys3pID7GzsNL4GX6q0nLPx9t5Unu9DrwctpnWmwyAzpLutPL X-Developer-Key: i=dmitry.baryshkov@oss.qualcomm.com; a=openpgp; fpr=8F88381DD5C873E4AE487DA5199BF1243632046A X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwODMwMDAxOSBTYWx0ZWRfX06x71+79Q3TJ qoHyjSunX4PxIP+xtjd1vSXXdCZemmm1CN7GTlv3MfTF+VSRoHFiSr0Wde2OkZZnFC0ruicXyRj +Vbs13VeJm4VXWQOyUliKbFD5ZXytUpklsLarS52wVelBNFuwJG1vt9Hc4Jlodd1KMVlFYExF6p 77k2iyNvZx1naEn06m+8YxtyAwa83jkkqDVgQ9u85WvPVsSfQ+oME9/VB6fKMpRy2ge5zkIJOGQ rSCTOP/XiUFQc57iamNSbUNiwDupVW7IzWCSCKKE5xRIozr9wyGJdfA6H/sz1PrKgGWYueVHXmc D8uKcYF7S7VQZlyPkKrK7ULQgBF1dX3YOIbN2xpCzqmyiD/5B51lJDsB/vcn2S0+X+NZnEqq2cp 0jHNKe88 X-Proofpoint-GUID: 3BYqIZgK8esmSnQs61dkgVsvBIZbjVbe X-Proofpoint-ORIG-GUID: 3BYqIZgK8esmSnQs61dkgVsvBIZbjVbe X-Authority-Analysis: v=2.4 cv=PNkP+eqC c=1 sm=1 tr=0 ts=68b81dcc cx=c_pps a=oc9J++0uMp73DTRD5QyR2A==:117 a=xqWC_Br6kY4A:10 a=IkcTkHD0fZMA:10 a=yJojWOMRYYMA:10 a=EUspDBNiAAAA:8 a=5Zp61nms7guAxvsrN5oA:9 a=QEXdDO2ut3YA:10 a=iYH6xdkBrDN1Jqds4HTS:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1117,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-09-03_06,2025-08-28_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 bulkscore=0 priorityscore=1501 impostorscore=0 clxscore=1015 suspectscore=0 adultscore=0 phishscore=0 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2507300000 definitions=main-2508300019 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 --- 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 0952c7f18abdca4a7e24e5af8a7132456bfec129..4d1ea9b2619170335ab4d2a2ee4= 6f31e785b2c02 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 =3D PTR_ERR(mmu); goto fail; } else if (!mmu) { - DRM_DEV_INFO(dev->dev, "no iommu, fallback to phys " - "contig buffers for scanout\n"); - vm =3D NULL; + DRM_DEV_INFO(dev->dev, "no IOMMU, bailing out\n"); + ret =3D -ENODEV; + goto fail; } else { vm =3D msm_gem_vm_create(dev, mmu, "mdp4", 0x1000, 0x100000000 - 0x1000, --=20 2.47.2