[Bug 98214] drm/i915: WARN_ON_ONCE(!crtc_clock || cdclk < crtc_clock)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98214

--- Comment #18 from Daniel Rowe <daniel.rowe at fathom13.com> ---
Also seeing this issue on a intel NUC 6th gen on Fedora 24 which has just
updated to 4.8.*.

Also see screen flicker and see this in dmesg:

intel_display.c:14178 skl_max_scale.part.120+0x75/0x80 [i915]
[drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many full
retries, give up

------------[ cut here ]------------
[ 1317.038438] WARNING: CPU: 0 PID: 1410 at
drivers/gpu/drm/i915/intel_display.c:14178 skl_max_scale.part.120+0x75/0x80
[i915]
[ 1317.038439] WARN_ON_ONCE(!crtc_clock || cdclk < crtc_clock)
[ 1317.038440] Modules linked in:
[ 1317.038442]  rfcomm fuse xt_CHECKSUM ipt_MASQUERADE nf_nat_masquerade_ipv4
tun rpcsec_gss_krb5 nfsv4 dns_resolver nfs fscache nf_conntrack_netbios_ns
nf_conntrack_broadcast ip6t_REJECT nf_reject_ipv6 ip6t_rpfilter xt_conntrack
ip_set nfnetlink ebtable_nat ebtable_broute bridge ip6table_nat
nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_raw ip6table_mangle
ip6table_security iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4
nf_nat nf_conntrack iptable_raw iptable_mangle iptable_security ebtable_filter
ebtables ip6table_filter ip6_tables cmac bnep vfat fat arc4 intel_rapl
x86_pkg_temp_thermal intel_powerclamp snd_hda_codec_hdmi coretemp kvm_intel
snd_soc_skl kvm snd_soc_skl_ipc snd_soc_sst_ipc snd_soc_sst_dsp
snd_hda_ext_core snd_hda_codec_realtek snd_soc_sst_match snd_hda_codec_generic
[ 1317.038491]  snd_soc_core snd_compress snd_pcm_dmaengine iwlmvm ac97_bus
snd_hda_intel snd_hda_codec mac80211 iTCO_wdt snd_hda_core iTCO_vendor_support
snd_hwdep irqbypass snd_seq crct10dif_pclmul crc32_pclmul snd_seq_device
ghash_clmulni_intel intel_cstate snd_pcm intel_uncore hci_uart iwlwifi btusb
btqca btrtl intel_rapl_perf joydev btbcm cfg80211 btintel bluetooth snd_timer
mei_me mei snd idma64 soundcore i2c_i801 ir_lirc_codec lirc_dev intel_lpss_pci
shpchp i2c_smbus intel_pch_thermal rfkill rc_rc6_mce ite_cir
pinctrl_sunrisepoint rc_core intel_lpss_acpi pinctrl_intel intel_lpss acpi_pad
acpi_als kfifo_buf industrialio tpm_tis tpm_tis_core tpm nfsd auth_rpcgss
nfs_acl lockd grace sunrpc 8021q garp stp llc mrp btrfs xor raid6_pq i915
i2c_algo_bit e1000e drm_kms_helper crc32c_intel drm sdhci_pci
[ 1317.038575]  ptp sdhci pps_core mmc_core nvme nvme_core video i2c_hid fjes
[ 1317.038588] CPU: 0 PID: 1410 Comm: Xorg Not tainted 4.8.4-200.fc24.x86_64 #1
[ 1317.038590] Hardware name:                  /NUC6i5SYB, BIOS
SYSKLi35.86A.0052.2016.0910.1456 09/10/2016
[ 1317.038593]  0000000000000286 0000000039322c5c ffff8fd4a9c0b910
ffffffffb33e5d0d
[ 1317.038598]  ffff8fd4a9c0b960 0000000000000000 ffff8fd4a9c0b950
ffffffffb30a0e4b
[ 1317.038601]  00003762000000b0 ffff8fd49caed240 ffff8fd4a7fcc000
ffff8fd4a8836000
[ 1317.038604] Call Trace:
[ 1317.038618]  [<ffffffffb33e5d0d>] dump_stack+0x63/0x86
[ 1317.038624]  [<ffffffffb30a0e4b>] __warn+0xcb/0xf0
[ 1317.038627]  [<ffffffffb30a0ecf>] warn_slowpath_fmt+0x5f/0x80
[ 1317.038632]  [<ffffffffb33f52a7>] ? sort+0x147/0x220
[ 1317.038651]  [<ffffffffc01b4754>] ?
drm_atomic_helper_normalize_zpos+0x264/0x300 [drm_kms_helper]
[ 1317.038701]  [<ffffffffc0290375>] skl_max_scale.part.120+0x75/0x80 [i915]
[ 1317.038749]  [<ffffffffc0290446>] intel_check_primary_plane+0xc6/0xe0 [i915]
[ 1317.038766]  [<ffffffffc01b4754>] ?
drm_atomic_helper_normalize_zpos+0x264/0x300 [drm_kms_helper]
[ 1317.038821]  [<ffffffffc0281662>] intel_plane_atomic_check+0x132/0x1f0
[i915]
[ 1317.038837]  [<ffffffffc01b1524>] drm_atomic_helper_check_planes+0x84/0x200
[drm_kms_helper]
[ 1317.038887]  [<ffffffffc029bf87>] intel_atomic_check+0x9a7/0x11a0 [i915]
[ 1317.038894]  [<ffffffffb3229d0b>] ? __kmalloc_track_caller+0x16b/0x210
[ 1317.038919]  [<ffffffffc014c0d7>] drm_atomic_check_only+0x187/0x610 [drm]
[ 1317.038939]  [<ffffffffc014b898>] ? drm_atomic_get_crtc_state+0x88/0x100
[drm]
[ 1317.038962]  [<ffffffffc014c577>] drm_atomic_commit+0x17/0x60 [drm]
[ 1317.038977]  [<ffffffffc01b090c>] drm_atomic_helper_update_plane+0xec/0x130
[drm_kms_helper]
[ 1317.039001]  [<ffffffffc013b21b>] __setplane_internal+0x22b/0x270 [drm]
[ 1317.039023]  [<ffffffffc013b399>] drm_mode_cursor_universal+0x139/0x240
[drm]
[ 1317.039048]  [<ffffffffc013b51e>] drm_mode_cursor_common+0x7e/0x180 [drm]
[ 1317.039073]  [<ffffffffc013fabe>] drm_mode_cursor2_ioctl+0xe/0x10 [drm]
[ 1317.039095]  [<ffffffffc0131fa0>] drm_ioctl+0x200/0x4f0 [drm]
[ 1317.039126]  [<ffffffffc013fab0>] ? drm_mode_cursor_ioctl+0x70/0x70 [drm]
[ 1317.039137]  [<ffffffffb311178d>] ? enqueue_hrtimer+0x3d/0x80
[ 1317.039141]  [<ffffffffb3264cf3>] do_vfs_ioctl+0xa3/0x5f0
[ 1317.039145]  [<ffffffffb36bd191>] ? __sys_recvmsg+0x51/0x90
[ 1317.039148]  [<ffffffffb32652b9>] SyS_ioctl+0x79/0x90
[ 1317.039154]  [<ffffffffb3802572>] entry_SYSCALL_64_fastpath+0x1a/0xa4
[ 1317.039226] ---[ end trace d9c8cd460822922a ]---

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