diff options
| author | Fabien Parent <fabien.parent@linaro.org> | 2022-10-27 13:19:23 +0200 |
|---|---|---|
| committer | Fabien Parent <fabien.parent@linaro.org> | 2022-10-30 12:13:08 +0100 |
| commit | 76dff2a7f7978a585e2f02c413bd76efbb2d754e (patch) | |
| tree | 00dd743dafaf1d4488e631ddaf1fd5d998703434 | |
| parent | 9d6e43c6919b7f386d25e503032f07a8b6f65586 (diff) | |
drm/msm/a4xx: implement gpu_busy to get devfreq support
The .gpu_busy callback needs to be implemented in order for devfreq to
be supported and registered.
void msm_devfreq_init(struct msm_gpu *gpu)
{
/* We need target support to do devfreq */
if (!gpu->funcs->gpu_busy)
return;
This commit implement the gpu_busy callback. This allows to save power
by not running at the highest OPP all the time when the GPU is on.
Signed-off-by: Fabien Parent <fabien.parent@linaro.org>
| -rw-r--r-- | drivers/gpu/drm/msm/adreno/a4xx_gpu.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/adreno/a4xx_gpu.c b/drivers/gpu/drm/msm/adreno/a4xx_gpu.c index 7cb8d9849c07..ec35ec3fd490 100644 --- a/drivers/gpu/drm/msm/adreno/a4xx_gpu.c +++ b/drivers/gpu/drm/msm/adreno/a4xx_gpu.c @@ -612,6 +612,17 @@ static int a4xx_get_timestamp(struct msm_gpu *gpu, uint64_t *value) return 0; } +static u64 a4xx_gpu_busy(struct msm_gpu *gpu, unsigned long *out_sample_rate) +{ + u64 busy_cycles; + + busy_cycles = gpu_read64(gpu, REG_A4XX_RBBM_PERFCTR_PWR_1_LO, + REG_A4XX_RBBM_PERFCTR_PWR_1_HI); + *out_sample_rate = clk_get_rate(gpu->core_clk); + + return busy_cycles; +} + static u32 a4xx_get_rptr(struct msm_gpu *gpu, struct msm_ringbuffer *ring) { ring->memptrs->rptr = gpu_read(gpu, REG_A4XX_CP_RB_RPTR); @@ -633,6 +644,7 @@ static const struct adreno_gpu_funcs funcs = { #if defined(CONFIG_DEBUG_FS) || defined(CONFIG_DEV_COREDUMP) .show = adreno_show, #endif + .gpu_busy = a4xx_gpu_busy, .gpu_state_get = a4xx_gpu_state_get, .gpu_state_put = adreno_gpu_state_put, .create_address_space = adreno_iommu_create_address_space, |