[PATCH v5 10/11] drm/amd: Avoid evicting resources at S5

[Mario Limonciello (AMD)]

Normally resources are evicted on dGPUs at suspend or hibernate and
on APUs at hibernate.  These steps are unnecessary when using the S4
callbacks to put the system into S5.

Cc: AceLan Kao <acelan.kao at canonical.com>
Cc: Kai-Heng Feng <kaihengf at nvidia.com>
Cc: Mark Pearson <mpearson-lenovo at squebb.ca>
Cc: Denis Benato <benato.denis96 at gmail.com>
Cc: Merthan Karakaş <m3rthn.k at gmail.com>
Tested-by: Eric Naim <dnaim at cachyos.org>
Acked-by: Alex Deucher <alexander.deucher at amd.com>
Signed-off-by: Mario Limonciello (AMD) <superm1 at kernel.org>
---
v5:
 * No changes
v4:
 * Add A-b tag for Alex
 * https://lore.kernel.org/linux-pci/20250616175019.3471583-1-superm1@kernel.org/
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index f9b4c4321f67c..4e4b7a63cc61e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -5017,6 +5017,10 @@ static int amdgpu_device_evict_resources(struct amdgpu_device *adev)
 	if (!adev->in_s4 && (adev->flags & AMD_IS_APU))
 		return 0;
 
+	/* No need to evict when going to S5 through S4 callbacks */
+	if (system_state == SYSTEM_HALT || system_state == SYSTEM_POWER_OFF)
+		return 0;
+
 	ret = amdgpu_ttm_evict_resources(adev, TTM_PL_VRAM);
 	if (ret) {
 		dev_warn(adev->dev, "evicting device resources failed\n");
-- 
2.43.0