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Sun, 05 Jul 2026 12:14:18 -0700 (PDT) From: Anna Maniscalco Date: Sun, 05 Jul 2026 21:13:37 +0200 Subject: [PATCH RFC 03/13] drm/msm: look for lpac from dts 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: 7bit Message-Id: <20260705-descriptive-name-lpac-upstream-v1-3-01d50c3e0c99@gmail.com> References: <20260705-descriptive-name-lpac-upstream-v1-0-01d50c3e0c99@gmail.com> In-Reply-To: <20260705-descriptive-name-lpac-upstream-v1-0-01d50c3e0c99@gmail.com> To: Rob Clark , Will Deacon , Robin Murphy , Joerg Roedel , Sean Paul , Konrad Dybcio , Akhil P Oommen , Dmitry Baryshkov , Abhinav Kumar , Jessica Zhang , Marijn Suijten , David Airlie , Simona Vetter , Bjorn Andersson , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann Cc: iommu@lists.linux.dev, linux-arm-msm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, devicetree@vger.kernel.org, Anna Maniscalco X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1783278851; l=3023; i=anna.maniscalco2000@gmail.com; s=20240815; h=from:subject:message-id; bh=bbKLUcBLFub1tb5TatUPZPAkNtWF5490OkNoXJdO3Uk=; b=7V8X3RcC17AsLp4EvKV8VBh99CxZsYWbT6DX1+PJ1oeSqvZHrZHxSjd1CzKlfExV5zUSLhrW1 hjyiu/P/E73CA/bsNLALt50GwglEelh/PKZjB7H/Z0Rc38c39U6bUFN X-Developer-Key: i=anna.maniscalco2000@gmail.com; a=ed25519; pk=0zicFb38tVla+iHRo4kWpOMsmtUrpGBEa7LkFF81lyY= In order to associate the SID used by LPAC to it's own domain and context bank we need a separate node on the DTS. Add the code to look up that node on initialization. Signed-off-by: Anna Maniscalco --- drivers/gpu/drm/msm/adreno/adreno_gpu.c | 21 ++++++++++++++++++++- drivers/gpu/drm/msm/msm_gpu.h | 1 + 2 files changed, 21 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c index f3fc7032fadc..71ce4cbbf27a 100644 --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c @@ -11,6 +11,8 @@ #include #include #include +#include +#include #include #include #include @@ -201,7 +203,9 @@ adreno_iommu_create_vm(struct msm_gpu *gpu, struct drm_gpuvm *vm; u64 start, size; - mmu = msm_iommu_gpu_new(&pdev->dev, NULL, gpu, quirks); + mmu = msm_iommu_gpu_new(&pdev->dev, + gpu->lpac_pdev ? &gpu->lpac_pdev->dev : NULL, + gpu, quirks); if (IS_ERR(mmu)) return ERR_CAST(mmu); @@ -1187,6 +1191,7 @@ int adreno_gpu_init(struct drm_device *drm, struct platform_device *pdev, const struct adreno_gpu_funcs *funcs, int nr_rings) { struct device *dev = &pdev->dev; + struct device_node *lpac_node; struct adreno_platform_config *config = dev->platform_data; struct msm_gpu_config adreno_gpu_config = { 0 }; struct msm_gpu *gpu = &adreno_gpu->base; @@ -1200,6 +1205,20 @@ int adreno_gpu_init(struct drm_device *drm, struct platform_device *pdev, gpu->allow_relocs = config->info->family < ADRENO_6XX_GEN1; gpu->pdev = pdev; + lpac_node = of_parse_phandle(pdev->dev.of_node, "qcom,lpac", 0); + if (lpac_node) + gpu->lpac_pdev = of_find_device_by_node(lpac_node); + if (gpu->lpac_pdev) { + of_dma_configure(&gpu->lpac_pdev->dev, lpac_node, true); + platform_set_drvdata(gpu->lpac_pdev, &gpu->lpac_adreno_smmu); + if (!device_link_add(&pdev->dev, &gpu->lpac_pdev->dev, + DL_FLAG_PM_RUNTIME | DL_FLAG_AUTOREMOVE_CONSUMER)) + dev_err(&gpu->lpac_pdev->dev, "failed to link to gpu device\n"); + pm_runtime_enable(&gpu->lpac_pdev->dev); + } + if (lpac_node) + of_node_put(lpac_node); + /* Only handle the core clock when GMU is not in use (or is absent). */ if (adreno_has_gmu_wrapper(adreno_gpu) || adreno_has_rgmu(adreno_gpu) || diff --git a/drivers/gpu/drm/msm/msm_gpu.h b/drivers/gpu/drm/msm/msm_gpu.h index e2291dfe3ca8..271956e7f870 100644 --- a/drivers/gpu/drm/msm/msm_gpu.h +++ b/drivers/gpu/drm/msm/msm_gpu.h @@ -172,6 +172,7 @@ struct msm_gpu { const char *name; struct drm_device *dev; struct platform_device *pdev; + struct platform_device *lpac_pdev; const struct msm_gpu_funcs *funcs; struct adreno_smmu_priv adreno_smmu; -- 2.54.0