MIRRORS/linux-yocto
1
0
Fork 0
mirror of git://git.yoctoproject.org/linux-yocto.git synced 2025-07-19 12:50:21 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity

drm/amdgpu: improve wait logic at fence polling

Browse Source 
Accomplish this by reading the seq number right away instead of sleep
for 5us. There are certain cases where the fence is ready almost
immediately. Sleep number granularity was also reduced as the majority
of the kiq tlb flush takes between 2us to 6us.

Signed-off-by: Alex Sierra <alex.sierra@amd.com>
Acked-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Sierra 2023-04-24 14:27:26 -05:00 committed by Alex Deucher
parent 17d62410ae
commit 6e87c42295
1 changed files with 4 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
View File

@ -376,14 +376,11 @@ signed long amdgpu_fence_wait_polling(struct amdgpu_ring *ring,
uint32_t wait_seq,
signed long timeout)
{
uint32_t seq;
do {
seq = amdgpu_fence_read(ring);
udelay(5);
timeout -= 5;
} while ((int32_t)(wait_seq - seq) > 0 && timeout > 0);
while ((int32_t)(wait_seq - amdgpu_fence_read(ring)) > 0 && timeout > 0) {
udelay(2);
timeout -= 2;
}
return timeout > 0 ? timeout : 0;
}
/**