Add support for gpu_busy on a4xx, which is required for devfreq
support.
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Signed-off-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx>
---
drivers/gpu/drm/msm/adreno/a4xx_gpu.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/gpu/drm/msm/adreno/a4xx_gpu.c b/drivers/gpu/drm/msm/adreno/a4xx_gpu.c
index 3e09d3a7a0ac..715436cb3996 100644
--- a/drivers/gpu/drm/msm/adreno/a4xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a4xx_gpu.c
@@ -611,6 +611,16 @@ 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_RBBM_1_LO);
+ *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);
@@ -632,6 +642,7 @@ 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_create_address_space,
--
2.39.2
