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drm/amdgpu/vcn: fix race condition issue for dpg unpause mode switch

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Couldn't only rely on enc fence to decide switching to dpg unpaude mode.
Since a enc thread may not schedule a fence in time during multiple
threads running situation.

v3: 1. Rename enc_submission_cnt to dpg_enc_submission_cnt
    2. Add dpg_enc_submission_cnt check in idle_work_handler

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

Signed-off-by: James Zhu <James.Zhu@amd.com>
Reviewed-by: Leo Liu <leo.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
James Zhu
2020-02-10 12:52:16 -05:00
committed by Alex Deucher
parent bd718638b8
commit e3b41d82da
2 changed files with 23 additions and 12 deletions
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1
drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.h
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@@ -183,6 +183,7 @@ struct amdgpu_vcn_inst {
void *dpg_sram_cpu_addr;
uint64_t dpg_sram_gpu_addr;
uint32_t *dpg_sram_curr_addr;
atomic_t dpg_enc_submission_cnt;
};
struct amdgpu_vcn {