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[2001:14ba:a0c3:3a00:264b:feff:fe8b:be8a]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-556383bb555sm920621e87.20.2025.07.06.03.50.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 06 Jul 2025 03:50:43 -0700 (PDT) From: Dmitry Baryshkov Date: Sun, 06 Jul 2025 13:50:36 +0300 Subject: [PATCH 1/3] 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: <20250706-msm-no-iommu-v1-1-9e8274b30c33@oss.qualcomm.com> References: <20250706-msm-no-iommu-v1-0-9e8274b30c33@oss.qualcomm.com> In-Reply-To: <20250706-msm-no-iommu-v1-0-9e8274b30c33@oss.qualcomm.com> To: Rob Clark , Dmitry Baryshkov , Abhinav Kumar , Jessica Zhang , Sean Paul , Marijn Suijten , David Airlie , Simona Vetter , Antonino Maniscalco 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=1188; i=dmitry.baryshkov@oss.qualcomm.com; h=from:subject:message-id; bh=N1V1r2a+Uu111oA5aVLPWmTma/v7zxodScONBUW8ukI=; b=owEBbQGS/pANAwAKAYs8ij4CKSjVAcsmYgBoalUBQahHAv2TwvvVK6FFPuXM20VbAQOAG8788 ssuEBgbNNGJATMEAAEKAB0WIQRMcISVXLJjVvC4lX+LPIo+Aiko1QUCaGpVAQAKCRCLPIo+Aiko 1f0mB/9PUKhWISZlHBDACtU3YF/1alKgkRr5n3JHsdRqlQeuTcv7GtWeTdbBgfcxxcR1qnFRZwd +o40ttKKbXMaTPm3hfz9nSbot1W+caMuNXSLtZUzk2tDECCK0EGsPk5UrRHzVOV9RGR8fWK0Gqo GW9m7ZEIJOJqOPXtzaXSeF9DBgHtbWr4mvxSvipVlRBUgJzUCQ8rmNdkpcvdwB/LWtX+d9OSdGD XuiYccV7R44JUN6RSc6EhjfQM953FfA9QFRMvrTSqbYhpy+DrYQyOGQm+MvMJmU45x+ofhnueYa 6rrDlr4nMhqujzT8V2Zrk7tqCMpl4zFHJMRZGA/hBUIxxDMa X-Developer-Key: i=dmitry.baryshkov@oss.qualcomm.com; a=openpgp; fpr=8F88381DD5C873E4AE487DA5199BF1243632046A X-Proofpoint-ORIG-GUID: Vufs0_OWMSwaw-EHB8eVN5ZmWlgJzKjW X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNzA2MDA2NyBTYWx0ZWRfX7hx0IHU7bhr/ y/RThGclFTZI8koBcmTksExRcIVK2LGGEFII+EHHDVptjbRvvkvoxaPcm15D/J+qsJAOyKCBdim cbDQJw2Oe0N/CScDUQS3PsYhmpoH5RjbKuqhqqoXxDV79d+eyTm4mjREdC7viVADNHsXsnhCQXm 7HAIREwK87/yDuuyTC2Ub3Jg2m11f4C6uknloe6f8YGFTP8EP31RTnA+zS6ZtuxpuDYPFil3+AF opJUprtPG5TTvKWbC76aRBK/SADPbgQblR5Kdc2hYK83phqvRAvye41GvkHKiJkxmm1JFV2QnhM s10YKHAQF9A7q5QGihmlYaFPrM/D5EoQctdq3DNuLn/qArc4RZO+OmIlwZ3fptke2o8WMtPVcLV FC3aEd0sp7SErCgMQcsXtXn1NoDKAD3sfQRoaBD9KDwkg1qAourwDqORWSWUygx/LqbsyHE6 X-Proofpoint-GUID: Vufs0_OWMSwaw-EHB8eVN5ZmWlgJzKjW X-Authority-Analysis: v=2.4 cv=GtBC+l1C c=1 sm=1 tr=0 ts=686a5506 cx=c_pps a=qKBjSQ1v91RyAK45QCPf5w==:117 a=xqWC_Br6kY4A:10 a=IkcTkHD0fZMA:10 a=Wb1JkmetP80A:10 a=EUspDBNiAAAA:8 a=0pe4r8NFi1m0JDAohsgA:9 a=QEXdDO2ut3YA:10 a=NFOGd7dJGGMPyQGDc5-O:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.1.7,FMLib:17.12.80.40 definitions=2025-07-04_07,2025-07-04_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 clxscore=1015 spamscore=0 adultscore=0 phishscore=0 malwarescore=0 priorityscore=1501 lowpriorityscore=0 bulkscore=0 suspectscore=0 impostorscore=0 mlxlogscore=999 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2505280000 definitions=main-2507060067 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..88296c41d1a5eb0e16cb6ec4d04= 75000b6318c4e 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 configuration is no longer supported\n"= ); + ret =3D -ENODEV; + goto fail; } else { vm =3D msm_gem_vm_create(dev, mmu, "mdp4", 0x1000, 0x100000000 - 0x1000, --=20 2.39.5