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drm/amdgpu/vcn: fix race condition issue for vcn start

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Fix race condition issue when multiple vcn starts are called.

v2: Removed checking the return value of cancel_delayed_work_sync()
to prevent possible races here.

v3: Add total_submission_cnt to avoid gate power unexpectedly.

v4: Remove extra counter check, and reduce counter before idle
work schedule

Signed-off-by: James Zhu <James.Zhu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
James Zhu
2020-02-10 12:41:41 -05:00
committed by Alex Deucher
parent 17e137f27c
commit bd718638b8
2 changed files with 16 additions and 7 deletions
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2
drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.h
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@@ -200,6 +200,8 @@ struct amdgpu_vcn {
struct drm_gpu_scheduler *vcn_dec_sched[AMDGPU_MAX_VCN_INSTANCES];
uint32_t num_vcn_enc_sched;
uint32_t num_vcn_dec_sched;
struct mutex vcn_pg_lock;
atomic_t total_submission_cnt;
unsigned harvest_config;
int (*pause_dpg_mode)(struct amdgpu_device *adev,