[PATCH] drm/amd/pm: keep the BACO feature enabled for suspend

[Chen, Guchun]

[Public]

Reviewed-by: Guchun Chen <guchun.chen at amd.com>

Regards,
Guchun

-----Original Message-----
From: Quan, Evan <Evan.Quan at amd.com> 
Sent: Thursday, December 30, 2021 6:01 PM
To: amd-gfx at lists.freedesktop.org
Cc: Deucher, Alexander <Alexander.Deucher at amd.com>; Chen, Guchun <Guchun.Chen at amd.com>; Quan, Evan <Evan.Quan at amd.com>
Subject: [PATCH] drm/amd/pm: keep the BACO feature enabled for suspend

To pair with the workaround which always reset the ASIC in suspend.
Otherwise, the reset which relies on BACO will fail.

Fixes: 50583690930d ("drm/amdgpu: always reset the asic in suspend (v2)")

Signed-off-by: Evan Quan <evan.quan at amd.com>
Change-Id: I39ed072af16e34ef1e1c16b50ace6d46fbc388b9
---
 drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
index 4d867778a65c..7628be2f2301 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
@@ -1308,10 +1308,16 @@ static int smu_disable_dpms(struct smu_context *smu)  {
 	struct amdgpu_device *adev = smu->adev;
 	int ret = 0;
+	/*
+	 * TODO: (adev->in_suspend && !adev->in_s0ix) is added to pair
+	 * the workaround which always reset the asic in suspend.
+	 * It's likely that workaround will be dropped in the future.
+	 * Then the change here should be dropped together.
+	 */
 	bool use_baco = !smu->is_apu &&
 		((amdgpu_in_reset(adev) &&
 		  (amdgpu_asic_reset_method(adev) == AMD_RESET_METHOD_BACO)) ||
-		 ((adev->in_runpm || adev->in_s4) && amdgpu_asic_supports_baco(adev)));
+		 ((adev->in_runpm || adev->in_s4 || (adev->in_suspend && 
+!adev->in_s0ix)) && amdgpu_asic_supports_baco(adev)));
 
 	/*
 	 * For custom pptable uploading, skip the DPM features
--
2.29.0