Commit ec793cf0 authored by Akhil P Oommen's avatar Akhil P Oommen Committed by Rob Clark
Browse files

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: default avatarAkhil P Oommen <akhilpo@codeaurora.org>
Tested-by: default avatarMatthias Kaehlcke <mka@chromium.org>
Signed-off-by: default avatarRob Clark <robdclark@chromium.org>
parent cf11c1f8

drivers/gpu/drm/msm/msm_gpu.c

+12 −0
Original line number Diff line number Diff line
@@ -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)
@@ -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);

}

drivers/gpu/drm/msm/msm_gpu.h

+2 −0
Original line number Diff line number Diff line
@@ -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)

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