Signed-off-by: Huang Rui <ray.hu...@amd.com>
---
Changes from V2 -> V3:
- use mutex to protect the is_powergated flag.
---
drivers/gpu/drm/amd/amdgpu/amdgpu.h | 1 +
drivers/gpu/drm/amd/amdgpu/vce_v3_0.c | 44 +++++++++++++++++++++++++++++++----
2 files changed, 41 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index afb3ded..5d31e4d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -1213,6 +1213,7 @@ struct amdgpu_vce {
struct amd_sched_entity entity;
uint32_t srbm_soft_reset;
unsigned num_rings;
+ bool is_powergated;
};
/*
diff --git a/drivers/gpu/drm/amd/amdgpu/vce_v3_0.c
b/drivers/gpu/drm/amd/amdgpu/vce_v3_0.c
index 35ff1c3..dbd8e87 100644
--- a/drivers/gpu/drm/amd/amdgpu/vce_v3_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/vce_v3_0.c
@@ -770,15 +770,50 @@ static int vce_v3_0_set_powergating_state(void *handle,
* the smc and the hw blocks
*/
struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+ int ret = 0;
if (!(adev->pg_flags & AMD_PG_SUPPORT_VCE))
return 0;
- if (state == AMD_PG_STATE_GATE)
+ mutex_lock(&adev->grbm_idx_mutex);
+
+ if (state == AMD_PG_STATE_GATE) {
+ adev->vce.is_powergated = true;
/* XXX do we need a vce_v3_0_stop()? */
- return 0;
- else
- return vce_v3_0_start(adev);
+ } else {
+ ret = vce_v3_0_start(adev);
+ if (ret)
+ goto out;
+ adev->vce.is_powergated = false;
+ }
+
+out:
+ mutex_unlock(&adev->grbm_idx_mutex);
+
+ return ret;
+}
+
+static void vce_v3_0_get_clockgating_state(void *handle, u32 *flags)
+{
+ struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+ int data;
+
+ mutex_lock(&adev->grbm_idx_mutex);
+
+ if (adev->vce.is_powergated) {
+ DRM_INFO("Cannot get clockgating state when VCE is
powergated.\n");
+ goto out;
+ }
+
+ WREG32_FIELD(GRBM_GFX_INDEX, VCE_INSTANCE, 0);
+
+ /* AMD_CG_SUPPORT_VCE_MGCG */
+ data = RREG32(mmVCE_CLOCK_GATING_A);
+ if (data & (0x04 << 4))
+ *flags |= AMD_CG_SUPPORT_VCE_MGCG;
+
+out:
+ mutex_unlock(&adev->grbm_idx_mutex);
}
static void vce_v3_0_ring_emit_ib(struct amdgpu_ring *ring,
@@ -832,6 +867,7 @@ static const struct amd_ip_funcs vce_v3_0_ip_funcs = {
.post_soft_reset = vce_v3_0_post_soft_reset,
.set_clockgating_state = vce_v3_0_set_clockgating_state,
.set_powergating_state = vce_v3_0_set_powergating_state,
+ .get_clockgating_state = vce_v3_0_get_clockgating_state,
};
static const struct amdgpu_ring_funcs vce_v3_0_ring_phys_funcs = {
--
2.7.4
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