[Bug 104257] [CFL-S] DP monitor is detected as second monitor when there is only one connected

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104257

--- Comment #6 from shashank.sharma at intel.com <shashank.sharma at intel.com> ---
>From the logs, VBT configuration is:
- Port A  = eDP
- Port B = LSPCON (DP-1)
- Port C = DP/HDMI (DP-2/HDMI-A-1)
- Port D = DP/HDMI (DP-3/HDMI-A-2)

DP-1 is able to probe LSPCON:
[drm_helper_probe_single_connector_modes [drm_kms_helper]] [CONNECTOR:49:DP-1]
[drm:intel_dp_detect [i915]] [CONNECTOR:49:DP-1]
[drm:lspcon_wake_native_aux_ch [i915]] Native AUX CH up, DPCD version: 1.2
[drm:lspcon_wait_mode [i915]] Current LSPCON mode PCON
[drm:intel_dp_read_dpcd [i915]] DPCD: 12 14 c4 01 01 15 00 01 00 00 04 00 0f 00
04
[drm:drm_dp_read_desc [drm_kms_helper]] DP branch: OUI 00-60-ad dev-ID MC2800
HW-rev 2.2 SW-rev 1.63 quirks 0x0000

And I can see that the EDID read is successful:
[drm:drm_helper_probe_single_connector_modes [drm_kms_helper]]
[CONNECTOR:49:DP-1] probed modes :
[drm:drm_mode_debug_printmodeline [drm]] Modeline 67:"1920x1080" 60 148500 1920
2008 2052 2200 1080 1084 1089 1125 0x48 0x9
[drm:drm_mode_debug_printmodeline [drm]] Modeline 74:"1920x1200" 60 154000 1920
1968 2000 2080 1200 1203 1209 1235 0x40 0x9
[drm:drm_mode_debug_printmodeline [drm]] Modeline 68:"1920x1080" 60 148500 1920
2008 2052 2200 1080 1084 1089 1125 0x40 0x5
[drm:drm_mode_debug_printmodeline [drm]] Modeline 100:"1920x1080" 60 148352
1920 2008 2052 2200 1080 1084 1089 1125 0x40 0x5
[drm:drm_mode_debug_printmodeline [drm]] Modeline 69:"1920x1080i" 60 74250 1920
2008 2052 2200 1080 1084 1094 1125 0x40 0x15

And even the DP-2 EDID read is successful:
[drm:drm_helper_probe_single_connector_modes [drm_kms_helper]]
[CONNECTOR:55:DP-2] probed modes :
[drm:drm_mode_debug_printmodeline [drm]] Modeline 132:"3840x2160" 30 297000
3840 4016 4104 4400 2160 2168 2178 2250 0x40 0x5
[drm:drm_mode_debug_printmodeline [drm]] Modeline 144:"3840x2160" 30 296703
3840 4016 4104 4400 2160 2168 2178 2250 0x40 0x5
[drm:drm_mode_debug_printmodeline [drm]] Modeline 133:"3840x2160" 25 297000
3840 4896 4984 5280 2160 2168 2178 2250 0x40 0x5
[drm:drm_mode_debug_printmodeline [drm]] Modeline 134:"3840x2160" 24 297000
3840 5116 5204 5500 2160 2168 2178 2250 0x40 0x5
[drm:drm_mode_debug_printmodeline [drm]] Modeline 145:"3840x2160" 24 296703
3840 5116 5204 5500 2160 2168 2178 2250 0x40 0x5

So looks like A DP 4K monitor and a HDMI 1080P monitor is connected. 
Can we please confirm if the logs are from the test setup ? 

LSPCON can't generate EDID, it reads from the connected Sink only. 

- Shashank

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