drm/radeon: check that we have a clock before PLL setup

Partially fixes: https://bugzilla.kernel.org/show_bug.cgi?id=75211

Signed-off-by: Christian König <christian.koenig@amd.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c
index 229be38cc6ca..b7983aaee445 100644
--- a/drivers/gpu/drm/radeon/atombios_crtc.c
+++ b/drivers/gpu/drm/radeon/atombios_crtc.c
@@ -1901,6 +1901,9 @@ int atombios_crtc_mode_set(struct drm_crtc *crtc,
             (ATOM_DEVICE_TV_SUPPORT | ATOM_DEVICE_CV_SUPPORT))
                 is_tvcv = true;
 
+        if (!radeon_crtc->adjusted_clock)
+                return -EINVAL;
+
         atombios_crtc_set_pll(crtc, adjusted_mode);
 
         if (ASIC_IS_DCE4(rdev))