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igt@i915_pm_rpm@gem-mmap-type@uc - Dmesg-warn - map pfn RAM range req uncached-minus for [mem 0x.*-0x.*], got write-back

https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10072/shard-glk8/igt@i915_pm_rpm@gem-mmap-type@uc.html

<6> [224.573533] [IGT] i915_pm_rpm: starting dynamic subtest uc
<7> [224.574019] [drm:drm_mode_setcrtc] [CRTC:67:pipe A]
<7> [224.597227] [drm:drm_add_display_info] Supported Monitor Refresh rate range is 0 Hz - 0 Hz
<7> [224.597242] [drm:drm_add_display_info] non_desktop set to 0
<7> [224.597705] i915 0000:00:02.0: [drm:do_gmbus_xfer [i915]] GMBUS [i915 gmbus dpb] NAK for addr: 0040 w(1)
<7> [224.597942] i915 0000:00:02.0: [drm:do_gmbus_xfer [i915]] GMBUS [i915 gmbus dpb] NAK on first message, retry
<7> [224.599292] i915 0000:00:02.0: [drm:do_gmbus_xfer [i915]] GMBUS [i915 gmbus dpb] NAK for addr: 0040 w(1)
<7> [224.599530] i915 0000:00:02.0: [drm:drm_dp_dual_mode_detect] DP dual mode HDMI ID:  (err -6)
<7> [224.599547] [drm:drm_detect_monitor_audio] Monitor has basic audio support
<7> [224.599751] [drm:drm_helper_hpd_irq_event] [CONNECTOR:143:HDMI-A-1] status updated from connected to connected
<7> [224.599760] [drm:drm_helper_hpd_irq_event] [CONNECTOR:143:HDMI-A-1] New epoch counter 1
<7> [224.599768] [drm:drm_helper_hpd_irq_event] [CONNECTOR:153:HDMI-A-2] Old epoch counter 1
<7> [224.599780] i915 0000:00:02.0: [drm:intel_hdmi_detect [i915]] [CONNECTOR:153:HDMI-A-2]
<7> [224.625846] [drm:drm_add_display_info] Supported Monitor Refresh rate range is 0 Hz - 0 Hz
<7> [224.625860] [drm:drm_add_display_info] non_desktop set to 0
<7> [224.625867] [drm:drm_add_display_info] HDMI: DVI dual 0, max TMDS clock 340000 kHz
<7> [224.625873] [drm:drm_add_display_info] HF-VSDB: max TMDS clock 600000 kHz
<7> [224.626132] i915 0000:00:02.0: [drm:do_gmbus_xfer [i915]] GMBUS [i915 gmbus dpc] NAK for addr: 0040 w(1)
<7> [224.626359] i915 0000:00:02.0: [drm:do_gmbus_xfer [i915]] GMBUS [i915 gmbus dpc] NAK on first message, retry
<7> [224.626735] i915 0000:00:02.0: [drm:do_gmbus_xfer [i915]] GMBUS [i915 gmbus dpc] NAK for addr: 0040 w(1)
<7> [224.629672] i915 0000:00:02.0: [drm:drm_dp_dual_mode_detect] DP dual mode HDMI ID:  (err -6)
<7> [224.629693] [drm:drm_detect_monitor_audio] Monitor has basic audio support
<7> [224.629722] [drm:drm_helper_hpd_irq_event] [CONNECTOR:153:HDMI-A-2] status updated from connected to connected
<7> [224.629730] [drm:drm_helper_hpd_irq_event] [CONNECTOR:153:HDMI-A-2] New epoch counter 1
<7> [224.630292] [drm:drm_mode_setcrtc] [CONNECTOR:143:HDMI-A-1]
<4> [224.633887] x86/PAT: i915_pm_rpm:1020 map pfn RAM range req uncached-minus for [mem 0x116804000-0x116805fff], got write-back
Edited by Tejasree Illipilli
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