Hi Akhil, On Thu, Oct 08, 2020 at 10:39:07PM +0530, Akhil P Oommen wrote: > Register GPU as a devfreq cooling device so that it can be passively > cooled by the thermal framework. > > Signed-off-by: Akhil P Oommen <akhilpo@xxxxxxxxxxxxxx> > --- > drivers/gpu/drm/msm/msm_gpu.c | 13 ++++++++++++- > drivers/gpu/drm/msm/msm_gpu.h | 2 ++ > 2 files changed, 14 insertions(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/msm/msm_gpu.c b/drivers/gpu/drm/msm/msm_gpu.c > index 55d1648..93ffd66 100644 > --- a/drivers/gpu/drm/msm/msm_gpu.c > +++ b/drivers/gpu/drm/msm/msm_gpu.c > @@ -14,6 +14,7 @@ > #include <generated/utsrelease.h> > #include <linux/string_helpers.h> > #include <linux/devfreq.h> > +#include <linux/devfreq_cooling.h> > #include <linux/devcoredump.h> > #include <linux/sched/task.h> > > @@ -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) > @@ -926,7 +936,6 @@ int msm_gpu_init(struct drm_device *drm, struct platform_device *pdev, > > msm_devfreq_init(gpu); > > - > gpu->aspace = gpu->funcs->create_address_space(gpu, pdev); > > if (gpu->aspace == NULL) > @@ -1005,4 +1014,6 @@ void msm_gpu_cleanup(struct msm_gpu *gpu) > gpu->aspace->mmu->funcs->detach(gpu->aspace->mmu); > msm_gem_address_space_put(gpu->aspace); > } > + > + devfreq_cooling_unregister(gpu->cooling); Resources should be released in reverse order, otherwise the cooling device could use resources that have already been freed. _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel