drm/msm: re-factor devfreq code
The devfreq framework requires the drivers to provide busy time estimations.
The GPU driver relies on the hardware performance counteres for the busy time
estimations, but different hardware revisions have counters which can be
sourced from different clocks. So the busy time estimation will be target
dependent. Additionally on targets where the clocks are completely controlled
by the on chip microcontroller, fetching and setting the current GPU frequency
will be different. This patch aims to embrace these differences by re-factoring
the devfreq code a bit.
Signed-off-by: Sharat Masetty <smasetty@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
diff --git a/drivers/gpu/drm/msm/msm_gpu.h b/drivers/gpu/drm/msm/msm_gpu.h
index 9122ee6..f82bac0 100644
--- a/drivers/gpu/drm/msm/msm_gpu.h
+++ b/drivers/gpu/drm/msm/msm_gpu.h
@@ -70,9 +70,11 @@ struct msm_gpu_funcs {
/* for generation specific debugfs: */
int (*debugfs_init)(struct msm_gpu *gpu, struct drm_minor *minor);
#endif
- int (*gpu_busy)(struct msm_gpu *gpu, uint64_t *value);
+ unsigned long (*gpu_busy)(struct msm_gpu *gpu);
struct msm_gpu_state *(*gpu_state_get)(struct msm_gpu *gpu);
int (*gpu_state_put)(struct msm_gpu_state *state);
+ unsigned long (*gpu_get_freq)(struct msm_gpu *gpu);
+ void (*gpu_set_freq)(struct msm_gpu *gpu, unsigned long freq);
};
struct msm_gpu {
@@ -264,6 +266,7 @@ static inline void gpu_write64(struct msm_gpu *gpu, u32 lo, u32 hi, u64 val)
int msm_gpu_pm_suspend(struct msm_gpu *gpu);
int msm_gpu_pm_resume(struct msm_gpu *gpu);
+void msm_gpu_resume_devfreq(struct msm_gpu *gpu);
int msm_gpu_hw_init(struct msm_gpu *gpu);