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drm/msm: Add devfreq support for the GPU

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Add support for devfreq to dynamically control the GPU frequency.
By default try to use the 'simple_ondemand' governor which can
adjust the frequency based on GPU load.

v2: Fix __aeabi_uldivmod issue from the 0 day bot and use
devfreq_recommended_opp() as suggested by Rob.

Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
This commit is contained in:
Jordan Crouse
2018-01-10 10:41:54 -07:00
committed by Rob Clark
parent c09513cfeb
commit f91c14ab44
4 changed files with 110 additions and 1 deletions
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7
drivers/gpu/drm/msm/msm_gpu.h
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@@ -66,6 +66,7 @@ struct msm_gpu_funcs {
/* show GPU status in debugfs: */
void (*show)(struct msm_gpu *gpu, struct seq_file *m);
#endif
int (*gpu_busy)(struct msm_gpu *gpu, uint64_t *value);
};
struct msm_gpu {
@@ -120,6 +121,12 @@ struct msm_gpu {
struct work_struct recover_work;
struct drm_gem_object *memptrs_bo;
struct {
struct devfreq *devfreq;
u64 busy_cycles;
ktime_t time;
} devfreq;
};
/* It turns out that all targets use the same ringbuffer size */