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drm/amd: flush any delayed gfxoff on suspend entry 

DCN 3.1.4 is reported to hang on s2idle entry if graphics activity
is happening during entry.  This is because GFXOFF was scheduled as
delayed but RLC gets disabled in s2idle entry sequence which will
hang GFX IP if not already in GFXOFF.

To help this problem, flush any delayed work for GFXOFF early in
s2idle entry sequence to ensure that it's off when RLC is changed.

commit 4b31b92b14 ("drm/amdgpu: complete gfxoff allow signal during
suspend without delay") modified power gating flow so that if called
in s0ix that it ensured that GFXOFF wasn't put in work queue but
instead processed immediately.

This is dead code due to commit 10cb67eb8a ("drm/amdgpu: skip
CG/PG for gfx during S0ix") because GFXOFF will now not be explicitly
called as part of the suspend entry code.  Remove that dead code.

Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Tim Huang <tim.huang@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Mario Limonciello 2023-05-18 11:52:51 -05:00 committed by Alex Deucher
parent f1740b1ab2
commit a7b7d9e8ae
2 changed files with 2 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
View File

@ -4394,6 +4394,7 @@ int amdgpu_device_suspend(struct drm_device *dev, bool fbcon)
drm_fb_helper_set_suspend_unlocked(adev_to_drm(adev)->fb_helper, true);
cancel_delayed_work_sync(&adev->delayed_init_work);
flush_delayed_work(&adev->gfx.gfx_off_delay_work);
amdgpu_ras_suspend(adev);

9
drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
View File

@ -692,15 +692,8 @@ void amdgpu_gfx_off_ctrl(struct amdgpu_device *adev, bool enable)
if (adev->gfx.gfx_off_req_count == 0 &&
!adev->gfx.gfx_off_state) {
/* If going to s2idle, no need to wait */
if (adev->in_s0ix) {
if (!amdgpu_dpm_set_powergating_by_smu(adev,
AMD_IP_BLOCK_TYPE_GFX, true))
adev->gfx.gfx_off_state = true;
} else {
schedule_delayed_work(&adev->gfx.gfx_off_delay_work,
schedule_delayed_work(&adev->gfx.gfx_off_delay_work,
delay);
}
}
} else {
if (adev->gfx.gfx_off_req_count == 0) {