From 4df3adab896f843afe5bca5960fbca6ff2cc407e Mon Sep 17 00:00:00 2001
From: Lijo Lazar <lijo.lazar@amd.com>
Date: Fri, 1 Oct 2021 16:49:07 +0800
Subject: [PATCH] drm/amdgpu: During s0ix don't wait to signal GFXOFF
Git-commit: 1d617c029fd9c960f8ba7a8d1a10699d820bd6b9
Patch-mainline: v5.15-rc5
References: stable-5.14.12

commit 1d617c029fd9c960f8ba7a8d1a10699d820bd6b9 upstream.

In the rare event when GFX IP suspend coincides with a s0ix entry, don't
schedule a delayed work, instead signal PMFW immediately to allow GFXOFF
entry. GFXOFF is a prerequisite for s0ix entry. PMFW needs to be
signaled about GFXOFF status before amd-pmc module passes OS HINT
to PMFW telling that everything is ready for a safe s0ix entry.

Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1712

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Mario Limonciello <mario.limonciell@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
index b4ced45301be..1795d448c700 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
@@ -31,6 +31,8 @@
 /* delay 0.1 second to enable gfx off feature */
 #define GFX_OFF_DELAY_ENABLE         msecs_to_jiffies(100)
 
+#define GFX_OFF_NO_DELAY 0
+
 /*
  * GPU GFX IP block helpers function.
  */
@@ -558,6 +560,8 @@ int amdgpu_gfx_enable_kcq(struct amdgpu_device *adev)
 
 void amdgpu_gfx_off_ctrl(struct amdgpu_device *adev, bool enable)
 {
+	unsigned long delay = GFX_OFF_DELAY_ENABLE;
+
 	if (!(adev->pm.pp_feature & PP_GFXOFF_MASK))
 		return;
 
@@ -573,8 +577,14 @@ void amdgpu_gfx_off_ctrl(struct amdgpu_device *adev, bool enable)
 
 		adev->gfx.gfx_off_req_count--;
 
-		if (adev->gfx.gfx_off_req_count == 0 && !adev->gfx.gfx_off_state)
-			schedule_delayed_work(&adev->gfx.gfx_off_delay_work, GFX_OFF_DELAY_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)
+				delay = GFX_OFF_NO_DELAY;
+			schedule_delayed_work(&adev->gfx.gfx_off_delay_work,
+					      delay);
+		}
 	} else {
 		if (adev->gfx.gfx_off_req_count == 0) {
 			cancel_delayed_work_sync(&adev->gfx.gfx_off_delay_work);
-- 
2.26.2