Revert "drm/amd/display: Restore 5s vbl offdelay for NV3x+ DGPUs"

Now that proper fixes have been found, let's revert this workaround.

This reverts commit a1fc7bf.

Tested-by: Mario Limonciello (AMD) <superm1@kernel.org>
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Signed-off-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit f64a9be)
Cc: stable@vger.kernel.org # 8382cd2: drm/amd/display: consolidate DCN vblank/flip handling onto vupdate_no_lock
Cc: stable@vger.kernel.org # 48ab863: drm/amd/display: check GRPH_FLIP status before sending event
Cc: stable@vger.kernel.org

Author: leo-sunli1

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

@@ -9675,21 +9675,9 @@ static void manage_dm_interrupts(struct amdgpu_device *adev,
 	if (acrtc_state) {
 		timing = &acrtc_state->stream->timing;
 
-		if (amdgpu_ip_version(adev, DCE_HWIP, 0) >=
-		      IP_VERSION(3, 2, 0) &&
-		      !(adev->flags & AMD_IS_APU)) {
-			/*
-			 * DGPUs NV3x and newer that support idle optimizations
-			 * experience intermittent flip-done timeouts on cursor
-			 * updates. Restore 5s offdelay behavior for now.
-			 *
-			 * Discussion on the issue:
-			 * https://lore.kernel.org/amd-gfx/20260217191632.1243826-1-sysdadmin@m1k.cloud/
-			 */
-			config.offdelay_ms = 5000;
-			config.disable_immediate = false;
-		} else if (amdgpu_ip_version(adev, DCE_HWIP, 0) <
-			     IP_VERSION(3, 5, 0)) {
+		if (amdgpu_ip_version(adev, DCE_HWIP, 0) <
+			   IP_VERSION(3, 5, 0) ||
+			   !(adev->flags & AMD_IS_APU)) {
 			/*
 			 * Older HW and DGPU have issues with instant off;
 			 * use a 2 frame offdelay.