[PATCH 1/2] drm/amdgpu: correct the S3 abort check condition

[Prike Liang]

In the normal S3 entry, the TOS cycle counter is not
reset during BIOS execution the _S3 method, so it doesn't
determine whether the _S3 method is executed exactly.
Howerver, the PM core performs the S3 suspend will set the
PM_SUSPEND_FLAG_FW_RESUME bit if all the devices suspend
successfully. Therefore, drivers can check the
pm_suspend_global_flags bit(1) to detect the S3 suspend
abort event.

Fixes: 4d58c599df75 ("drm/amdgpu: update suspend status
for aborting from deeper suspend")
Signed-off-by: Prike Liang <Prike.Liang at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/soc15.c | 26 +++++++++++++++++---------
 1 file changed, 17 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/soc15.c b/drivers/gpu/drm/amd/amdgpu/soc15.c
index 619933f252aa..d07cf8137bd7 100644
--- a/drivers/gpu/drm/amd/amdgpu/soc15.c
+++ b/drivers/gpu/drm/amd/amdgpu/soc15.c
@@ -578,16 +578,18 @@ soc15_asic_reset_method(struct amdgpu_device *adev)
 
 static bool soc15_need_reset_on_resume(struct amdgpu_device *adev)
 {
-	u32 sol_reg;
-
-	sol_reg = RREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_81);
+	bool suspend_complete;
 
 	/* Will reset for the following suspend abort cases.
-	 * 1) Only reset limit on APU side, dGPU hasn't checked yet.
-	 * 2) S3 suspend abort and TOS already launched.
+	 * 1) Only reset on APU side, dGPU hasn't checked yet.
+	 * 2) S3 suspend aborted in the normal S3 suspend or
+	 *    performing pm core test.
 	 */
+	suspend_complete = !!(pm_suspend_global_flags &
+				PM_SUSPEND_FLAG_FW_RESUME);
+
 	if (adev->flags & AMD_IS_APU && adev->in_s3 &&
-			sol_reg) {
+			!suspend_complete) {
 		adev->suspend_complete = false;
 		return true;
 	} else {
@@ -603,11 +605,17 @@ static int soc15_asic_reset(struct amdgpu_device *adev)
 	 * successfully. So now, temporarily enable it for the
 	 * S3 suspend abort case.
 	 */
-	if (((adev->apu_flags & AMD_APU_IS_RAVEN) ||
-	    (adev->apu_flags & AMD_APU_IS_RAVEN2)) &&
-		!soc15_need_reset_on_resume(adev))
+
+	if ((adev->apu_flags & AMD_APU_IS_PICASSO ||
+			!(adev->apu_flags & AMD_APU_IS_RAVEN)) &&
+			soc15_need_reset_on_resume(adev))
+		goto asic_reset;
+
+	if ((adev->apu_flags & AMD_APU_IS_RAVEN) ||
+			(adev->apu_flags & AMD_APU_IS_RAVEN2))
 		return 0;
 
+asic_reset:
 	switch (soc15_asic_reset_method(adev)) {
 	case AMD_RESET_METHOD_PCI:
 		dev_info(adev->dev, "PCI reset\n");
-- 
2.34.1