Description of problem:
This showed up after waking up from hibernate.

Additional info:
reporter:       libreport-2.2.3
WARNING: CPU: 5 PID: 1038 at drivers/gpu/drm/i915/intel_ddi.c:960 intel_ddi_pll_enable+0x253/0x260 [i915]()
WRPLL1 already enabled
Modules linked in: nls_utf8 isofs uas usb_storage ccm fuse ip6t_rpfilter ip6t_REJECT xt_conntrack bnep ebtable_nat ebtable_broute bridge stp llc ebtable_filter ebtables ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw ip6table_filter ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw vfat fat arc4 iwlmvm mac80211 btusb x86_pkg_temp_thermal coretemp kvm crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel snd_hda_codec_realtek snd_hda_codec_hdmi snd_hda_codec_generic snd_hda_intel snd_hda_controller snd_hda_codec iwlwifi cfg80211 bluetooth ideapad_laptop sparse_keymap rfkill snd_hwdep snd_seq snd_seq_device snd_pcm snd_timer snd rtsx_pci_ms rtsx_pci_sdmmc uvcvideo mmc_core microcode joydev memstick videobuf2_vmalloc videobuf2_memops soundcore iTCO_wdt iTCO_vendor_support hid_multitouch rtsx_pci videobuf2_core videodev media lpc_ich mfd_core mei_me i2c_i801 mei shpchp serio_raw nfsd auth_rpcgss nfs_acl lockd sunrpc i915 i2c_algo_bit drm_kms_helper drm r8169 mii i2c_core video
CPU: 5 PID: 1038 Comm: X Not tainted 3.15.10-200.fc20.x86_64 #1
Hardware name: LENOVO 20349/Lenovo Y50-70 Touch, BIOS 9ECN21WW(V1.04) 03/29/2014
 0000000000000000 000000002d4c7f85 ffff880446d17a48 ffffffff816ef9c8
 ffff880446d17a90 ffff880446d17a80 ffffffff8108931d ffff880444574000
 00000000b035061f 0000000000046040 ffffffffa0151ea5 0000000000000001
Call Trace:
 [<ffffffff816ef9c8>] dump_stack+0x45/0x56
 [<ffffffff8108931d>] warn_slowpath_common+0x7d/0xa0
 [<ffffffff8108939c>] warn_slowpath_fmt+0x5c/0x80
 [<ffffffffa0114a43>] intel_ddi_pll_enable+0x253/0x260 [i915]
 [<ffffffffa00fa748>] haswell_crtc_mode_set+0x48/0x4c0 [i915]
 [<ffffffffa00fe7bb>] __intel_set_mode+0x69b/0x1640 [i915]
 [<ffffffffa0101e16>] intel_set_mode+0x16/0x30 [i915]
 [<ffffffffa0102ced>] intel_crtc_set_config+0x8ed/0xdc0 [i915]
 [<ffffffffa00515a1>] drm_mode_set_config_internal+0x61/0xf0 [drm]
 [<ffffffffa0054b78>] drm_mode_setcrtc+0xe8/0x610 [drm]
 [<ffffffff816f5542>] ? mutex_lock+0x12/0x2f
 [<ffffffffa0045a3c>] drm_ioctl+0x1ec/0x660 [drm]
 [<ffffffff811f9ac0>] do_vfs_ioctl+0x2e0/0x4a0
 [<ffffffff8108cb01>] ? do_setitimer+0x91/0x230
 [<ffffffff811f9d01>] SyS_ioctl+0x81/0xa0
 [<ffffffff8111fc16>] ? __audit_syscall_exit+0x1f6/0x2a0
 [<ffffffff816ffae9>] system_call_fastpath+0x16/0x1b