joule: Gen9 warnings about device suspended during HW access

[jlaitine]

On joule 570x hardware, Gfx is printing occasionally these to log with Kernel 4.9. Bios is 1H3.

[  171.171405] ------------[ cut here ]------------
[  171.176615] WARNING: CPU: 0 PID: 1116 at /home/jlaitine/android/mig_ise-mig_os/build/tmp-glibc/work-shared/intel-5xx-64/kernel-so
urce/drivers/gpu/drm/i915/intel_drv.h:1719 gen9_decoupled_read32+0x1bb/0x1e0 [i915]
[  171.197756] Device suspended during HW access
[  171.202629] Modules linked in: intel_ipu4_isys_mod_bxtB0(O) videobuf2_v4l2 videobuf2_core intel_ipu4_psys_mod_bxtB0(O) intel_ipu4
_mmu_bxtB0(O) intel_ipu4_mod_bxtB0(O) iova intel_ipu4_acpi(O) videobuf2_dma_contig videobuf2_memops videobuf_core dw9714(O) crlmodul
e(O) v4l2_common videodev media rfcomm usb_f_mtp usb_f_ecm u_ether usb_f_acm u_serial snd_hda_codec_hdmi snd_hda_intel 8021q bnep li
bcomposite configfs iptable_nat nf_nat_ipv4 nf_nat iptable_mangle mei_spd gpio_keys intel_rapl x86_pkg_temp_thermal intel_powerclamp
 coretemp efivars clk_wcove typec_wcove gpio_wcove arc4 pwm_lpss_pci pwm_lpss iwlmvm(O) cdc_ether usbnet mac80211(O) btusb btrtl btb
cm iwlwifi(O) snd_soc_skl snd_soc_skl_ipc snd_soc_sst_ipc spi_pxa2xx_platform snd_soc_sst_dsp snd_hda_ext_core snd_soc_sst_match snd
_soc_core snd_compress ac97_bus cfg80211(O) snd_hda_codec snd_hda_core i915 snd_pcm compat(O) mei_me snd_timer mei processor_thermal
_device intel_soc_dts_iosf i2c_designware_platform i2c_designware_core dwc3_pci fdp_i2c fdp nci at24 nfc bq25890_charger nvmem_core 
hci_uart btintel video int3403_thermal int340x_thermal_zone int3400_thermal soc_button_array acpi_thermal_rel[  171.316733] cdc_ethe
r 1-2.2:2.0 eth0: kevent 11 may have been dropped
[  171.323951]  nf_conntrack_ipv4 nf_defrag_ipv4 iptable_filter nf_conntrack_ipv6 ip_tables nf_defrag_ipv6 xt_tcpudp xt_conntrack ui
o arizona_i2c nf_conntrack 5xx_comms_leds(O) ip6table_filter ip6_tables x_tables
[  171.344923] CPU: 1 PID: 1116 Comm: gst-launch-1.0 Tainted: G           O    4.9.15-yocto-standard #1
[  171.355125] Hardware name: Intel Corp. 570x DVT3/SDS, BIOS GTPP1H3A.X64.0143.B30.1706022158 06/02/2017
[  171.365526]  ffffc90000603ca0 ffffffff813fc61a ffffc90000603cf0 0000000000000000
[  171.373813]  ffffc90000603ce0 ffffffff8107bb6b 000006b78117acc8 000000000000d3b0
[  171.382090]  ffffc90000603de8 ffff88016ba85200 ffff880179f68000 ffffffffa02834f0
[  171.390375] Call Trace:
[  171.393111]  [<ffffffff813fc61a>] dump_stack+0x4d/0x63
[  171.398853]  [<ffffffff8107bb6b>] __warn+0xcb/0xf0
[  171.404206]  [<ffffffff8107bbdf>] warn_slowpath_fmt+0x4f/0x60
[  171.410628]  [<ffffffff81152d2f>] ? get_page_from_freelist+0x8bf/0x9a0
[  171.417959]  [<ffffffffa021804b>] gen9_decoupled_read32+0x1bb/0x1e0 [i915]
[  171.425669]  [<ffffffffa01be7f6>] i915_getparam+0x86/0x220 [i915]
[  171.432483]  [<ffffffff8152f20c>] drm_ioctl+0x1dc/0x440
[  171.438346]  [<ffffffffa01be770>] ? i915_pm_freeze+0x30/0x30 [i915]
[  171.445349]  [<ffffffff8117c62b>] ? handle_mm_fault+0x9cb/0xe20
[  171.451963]  [<ffffffff811cf734>] ? mntput+0x24/0x40
[  171.457509]  [<ffffffff811c1b54>] do_vfs_ioctl+0x94/0x5c0
[  171.463541]  [<ffffffff8104ae77>] ? __do_page_fault+0x277/0x4e0
[  171.470155]  [<ffffffff811c20f9>] SyS_ioctl+0x79/0x90
[  171.475800]  [<ffffffff81911860>] entry_SYSCALL_64_fastpath+0x13/0x94
[  171.483070] ---[ end trace fbd00f4867a6250f ]---
[  171.538258] [drm:__gen9_decoupled_mmio_access [i915]] *ERROR* Decoupled MMIO wait timed out
[  171.604735] [drm:__gen9_decoupled_mmio_access [i915]] *ERROR* Decoupled MMIO wait timed out