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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>
This commit is contained in:
Christian König 2014-05-02 14:27:42 +02:00
parent aa4c8b36e5
commit cde10122dc
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/radeon/atombios_crtc.c
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@ -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))