igt@i915_pm_backlight@basic-brightness - incomplete - No warnings/errors

https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_11447/bat-adlm-1/igt@i915_pm_backlight@basic-brightness.html

<6> [760.947944] Console: switching to colour dummy device 80x25
<6> [760.948286] [IGT] i915_pm_backlight: executing
<7> [760.956190] [drm:drm_helper_probe_single_connector_modes [drm_kms_helper]] [CONNECTOR:249:HDMI-A-1]
<7> [760.956209] i915 0000:00:02.0: [drm:intel_hdmi_detect [i915]] [CONNECTOR:249:HDMI-A-1]
<7> [761.007650] i915 0000:00:02.0: [drm:do_gmbus_xfer [i915]] GMBUS [i915 gmbus dpb] timed out, falling back to bit banging on pin 2
<7> [761.017234] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpb
<7> [761.017242] i915 0000:00:02.0: [drm:intel_hdmi_set_edid [i915]] HDMI GMBUS EDID read failed, retry using GPIO bit-banging
<7> [761.017345] i915 0000:00:02.0: [drm:intel_gmbus_force_bit [i915]] enabling bit-banging on i915 gmbus dpb. force bit now 1
<7> [761.024976] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpb
<7> [761.024979] i915 0000:00:02.0: [drm:intel_gmbus_force_bit [i915]] disabling bit-banging on i915 gmbus dpb. force bit now 0
<7> [761.075726] i915 0000:00:02.0: [drm:do_gmbus_xfer [i915]] GMBUS [i915 gmbus dpb] timed out, falling back to bit banging on pin 2
<7> [761.087212] i915 0000:00:02.0: [drm:drm_dp_dual_mode_detect [drm_dp_helper]] DP dual mode HDMI ID:  (err -6)
<7> [761.087228] [drm:drm_helper_probe_single_connector_modes [drm_kms_helper]] [CONNECTOR:249:HDMI-A-1] disconnected
<7> [761.087574] [drm:drm_helper_probe_single_connector_modes [drm_kms_helper]] [CONNECTOR:255:DP-2]
<7> [761.087580] i915 0000:00:02.0: [drm:intel_dp_detect [i915]] [CONNECTOR:255:DP-2]
<7> [761.087693] i915 0000:00:02.0: [drm:intel_power_well_enable [i915]] enabling power well 2
<7> [761.087786] i915 0000:00:02.0: [drm:intel_power_well_enable [i915]] enabling AUX USBC1
<7> [761.087893] i915 0000:00:02.0: [drm:intel_power_well_disable [i915]] disabling AUX USBC1
<7> [761.087964] i915 0000:00:02.0: [drm:intel_power_well_disable [i915]] disabling power well 2
<7> [761.088035] i915 0000:00:02.0: [drm:intel_power_well_enable [i915]] enabling power well 2