It's relevent regardless of whether there are displays
enabled.  Fixes garbage values for ref clock in powerplay
leading to incorrect fan speed reporting when displays
are disabled.

bug: https://bugs.freedesktop.org/show_bug.cgi?id=101653
Signed-off-by: Alex Deucher <[email protected]>
Cc: [email protected]
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c
index 8b8eda7..c0a8062 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c
@@ -838,9 +838,12 @@ static int amdgpu_cgs_get_active_displays_info(struct 
cgs_device *cgs_device,
                return -EINVAL;
 
        mode_info = info->mode_info;
-       if (mode_info)
+       if (mode_info) {
                /* if the displays are off, vblank time is max */
                mode_info->vblank_time_us = 0xffffffff;
+               /* always set the reference clock */
+               mode_info->ref_clock = adev->clock.spll.reference_freq;
+       }
 
        if (adev->mode_info.num_crtc && 
adev->mode_info.mode_config_initialized) {
                list_for_each_entry(crtc,
-- 
2.5.5

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