From e1e9c636bd5b19b538d05c8885a19e9355923e74 Mon Sep 17 00:00:00 2001 From: James Zhu Date: Thu, 13 Sep 2018 16:55:44 -0400 Subject: [PATCH 4688/5725] drm/amdgpu:No action when VCN PG state is unchanged MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit When VCN PG state is unchanged, it is unnecessary to reset power gate state Signed-off-by: James Zhu Acked-by: Alex Deucher Acked-by: Christian König --- drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.h | 1 + drivers/gpu/drm/amd/amdgpu/vcn_v1_0.c | 12 ++++++++++-- 2 files changed, 11 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.h index 0b0b863..d2219ab 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.h @@ -69,6 +69,7 @@ struct amdgpu_vcn { struct amdgpu_ring ring_jpeg; struct amdgpu_irq_src irq; unsigned num_enc_rings; + enum amd_powergating_state cur_state; }; int amdgpu_vcn_sw_init(struct amdgpu_device *adev); diff --git a/drivers/gpu/drm/amd/amdgpu/vcn_v1_0.c b/drivers/gpu/drm/amd/amdgpu/vcn_v1_0.c index d0c428f..5b219e6 100644 --- a/drivers/gpu/drm/amd/amdgpu/vcn_v1_0.c +++ b/drivers/gpu/drm/amd/amdgpu/vcn_v1_0.c @@ -1637,12 +1637,20 @@ static int vcn_v1_0_set_powergating_state(void *handle, * revisit this when there is a cleaner line between * the smc and the hw blocks */ + int ret; struct amdgpu_device *adev = (struct amdgpu_device *)handle; + if(state == adev->vcn.cur_state) + return 0; + if (state == AMD_PG_STATE_GATE) - return vcn_v1_0_stop(adev); + ret = vcn_v1_0_stop(adev); else - return vcn_v1_0_start(adev); + ret = vcn_v1_0_start(adev); + + if(!ret) + adev->vcn.cur_state = state; + return ret; } static const struct amd_ip_funcs vcn_v1_0_ip_funcs = { -- 2.7.4