[PATCH 1/2] drm/radeon: check that we have a clock before PLL setup

[Christian König]

From: Christian K?nig <christian.koe...@amd.com>

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

Signed-off-by: Christian K?nig <christian.koenig at amd.com>
---
 drivers/gpu/drm/radeon/atombios_crtc.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c 
b/drivers/gpu/drm/radeon/atombios_crtc.c
index 6da10d2..c31c12b 100644
--- a/drivers/gpu/drm/radeon/atombios_crtc.c
+++ b/drivers/gpu/drm/radeon/atombios_crtc.c
@@ -1902,6 +1902,9 @@ 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))
-- 
1.9.1