drm/amdgpu/cgs: always set reference clock in mode_info

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
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c
index 8b8eda7d1703dd2e2955a34e2df12c43f2052dfd..c0a806280257c80954930c3744d7cd65e6b6de5f 100644 (file)
--- 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,