From ec793cf01d1fe7f2d3eef30a0accfb3ca880abe4 Mon Sep 17 00:00:00 2001 From: Akhil P Oommen Date: Fri, 30 Oct 2020 16:17:10 +0530 Subject: [PATCH] drm/msm: Add support for GPU cooling Register GPU as a devfreq cooling device so that it can be passively cooled by the thermal framework. Signed-off-by: Akhil P Oommen Tested-by: Matthias Kaehlcke Signed-off-by: Rob Clark --- drivers/gpu/drm/msm/msm_gpu.c | 12 ++++++++++++ drivers/gpu/drm/msm/msm_gpu.h | 2 ++ 2 files changed, 14 insertions(+) diff --git a/drivers/gpu/drm/msm/msm_gpu.c b/drivers/gpu/drm/msm/msm_gpu.c index dbb8400..dfa3b5a 100644 --- a/drivers/gpu/drm/msm/msm_gpu.c +++ b/drivers/gpu/drm/msm/msm_gpu.c @@ -14,6 +14,7 @@ #include #include #include +#include #include #include @@ -107,9 +108,18 @@ static void msm_devfreq_init(struct msm_gpu *gpu) if (IS_ERR(gpu->devfreq.devfreq)) { DRM_DEV_ERROR(&gpu->pdev->dev, "Couldn't initialize GPU devfreq\n"); gpu->devfreq.devfreq = NULL; + return; } devfreq_suspend_device(gpu->devfreq.devfreq); + + gpu->cooling = of_devfreq_cooling_register(gpu->pdev->dev.of_node, + gpu->devfreq.devfreq); + if (IS_ERR(gpu->cooling)) { + DRM_DEV_ERROR(&gpu->pdev->dev, + "Couldn't register GPU cooling device\n"); + gpu->cooling = NULL; + } } static int enable_pwrrail(struct msm_gpu *gpu) @@ -1044,4 +1054,6 @@ void msm_gpu_cleanup(struct msm_gpu *gpu) if (gpu->worker) { kthread_destroy_worker(gpu->worker); } + + devfreq_cooling_unregister(gpu->cooling); } diff --git a/drivers/gpu/drm/msm/msm_gpu.h b/drivers/gpu/drm/msm/msm_gpu.h index 09938ae..786cfc2 100644 --- a/drivers/gpu/drm/msm/msm_gpu.h +++ b/drivers/gpu/drm/msm/msm_gpu.h @@ -155,6 +155,8 @@ struct msm_gpu { struct msm_gpu_state *crashstate; /* True if the hardware supports expanded apriv (a650 and newer) */ bool hw_apriv; + + struct thermal_cooling_device *cooling; }; static inline struct msm_gpu *dev_to_gpu(struct device *dev) -- 2.7.4