linux-kernel - [PATCH 0/3] drm/msm: drm

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Message-Id: <20250706-msm-no-iommu-v1-0-9e8274b30c33@oss.qualcomm.com>
Date: Sun, 06 Jul 2025 13:50:35 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Rob Clark <robin.clark@....qualcomm.com>,
        Dmitry Baryshkov <lumag@...nel.org>,
        Abhinav Kumar <abhinav.kumar@...ux.dev>,
        Jessica Zhang <jessica.zhang@....qualcomm.com>,
        Sean Paul <sean@...rly.run>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
        Antonino Maniscalco <antomani103@...il.com>
Cc: linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: [PATCH 0/3] drm/msm: drm_gpuvm leftovers

After switching to drm_gpuvm, the IOMMU becomes a requirement even for
KMS-only devices (e.g. allocating a buffer for DSI commands now also
requires the IOMMU / GPUVM). Disallow non-IOMMU configurations.

Note: MDP4 patches were compile-tested only.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
---
Dmitry Baryshkov (3):
      drm/msm/mdp4: stop supporting no-IOMMU configuration
      drm/msm: stop supporting no-IOMMU configuration
      drm/msm/mdp4: use msm_kms_init_vm() instead of duplicating it

 drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c | 27 +++++----------------------
 drivers/gpu/drm/msm/msm_kms.c            |  4 ++--
 2 files changed, 7 insertions(+), 24 deletions(-)
---
base-commit: 8290d37ad2b087bbcfe65fa5bcaf260e184b250a
change-id: 20250706-msm-no-iommu-c15212a0e7ac

Best regards,
-- 
With best wishes
Dmitry