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@codeaurora.org --- 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); } diff --git a/drivers/gpu/drm/msm/msm_gpu.h b/drivers/gpu/drm/msm/msm_gpu.h index 6c9e1fd..9a8f20d 100644 --- a/drivers/gpu/drm/msm/msm_gpu.h +++ b/drivers/gpu/drm/msm/msm_gpu.h @@ -147,6 +147,8 @@ 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)