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drm/msm: Add support for GPU cooling

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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>
Tested-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
This commit is contained in:
Akhil P Oommen 2020-10-30 16:17:10 +05:30 committed by Rob Clark
parent cf11c1f89d
commit ec793cf01d
2 changed files with 14 additions and 0 deletions
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12
drivers/gpu/drm/msm/msm_gpu.c
View File

@ -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);
}

2
drivers/gpu/drm/msm/msm_gpu.h
View File

@ -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)