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drm/msm/a3xx: Implement .gpu_busy 

Add support for gpu_busy on a3xx, which is required for devfreq
support.

Tested-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> #ifc6410
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/523789/
Link: https://lore.kernel.org/r/20230223-topic-opp-v3-5-5f22163cd1df@linaro.org
Signed-off-by: Rob Clark <robdclark@chromium.org>
This commit is contained in:
Konrad Dybcio 2023-02-23 11:52:01 +01:00 committed by Rob Clark
parent 9f251f9340
commit a9cf6e7fc3
1 changed files with 11 additions and 0 deletions
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11
drivers/gpu/drm/msm/adreno/a3xx_gpu.c
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@ -477,6 +477,16 @@ static struct msm_gpu_state *a3xx_gpu_state_get(struct msm_gpu *gpu)
return state;
}
static u64 a3xx_gpu_busy(struct msm_gpu *gpu, unsigned long *out_sample_rate)
{
u64 busy_cycles;
busy_cycles = gpu_read64(gpu, REG_A3XX_RBBM_PERFCTR_RBBM_1_LO);
*out_sample_rate = clk_get_rate(gpu->core_clk);
return busy_cycles;
}
static u32 a3xx_get_rptr(struct msm_gpu *gpu, struct msm_ringbuffer *ring)
{
ring->memptrs->rptr = gpu_read(gpu, REG_AXXX_CP_RB_RPTR);
@ -498,6 +508,7 @@ static const struct adreno_gpu_funcs funcs = {
#if defined(CONFIG_DEBUG_FS) || defined(CONFIG_DEV_COREDUMP)
.show = adreno_show,
#endif
.gpu_busy = a3xx_gpu_busy,
.gpu_state_get = a3xx_gpu_state_get,
.gpu_state_put = adreno_gpu_state_put,
.create_address_space = adreno_create_address_space,