> > > Below is the dmesg representing a video mode set. > > > > > > ELD writes from the graphics driver > > > > > > [ 424.254958] [drm:intel_write_eld], ELD on [CONNECTOR:12:HDMI-A-2], [ENCODER:11:TMDS-11] > > > [ 424.257670] [drm:ironlake_write_eld], ELD on pipe B > > > [ 424.259833] [drm:ironlake_write_eld], Audio directed to unknown port > > > [ 424.262156] [drm:ironlake_write_eld], ELD size 13 > > > > > > ELD events received by audio driver (eld reads 0) > > > > > > [ 424.263258] HDMI hot plug event: Codec=3 Pin=6 Presence_Detect=1 ELD_Valid=0 > > > > That line makes sense. > > > > > [ 424.265877] HDMI status: Codec=3 Pin=6 Presence_Detect=1 ELD_Valid=1 > > > > I don't /think/ it's related to this issue, but I wonder why ELDV==1 in > > that message; it seems that the unsolicited response contains the correct > > data, but AC_VERB_GET_PIN_SENSE contains ELDV==1 all the time. That's odd. > > It depends on timing. When audio driver receives the unsolicited event, > graphics driver has finished with "eld_valid = 1", hence > AC_VERB_GET_PIN_SENSE returns ELDV=1. > > It's not happening /all the time/ though. For example here is another > dmesg showing a different timing on the same test box. Sorry this is actually from another test box. But I did see similar ones from the same test box. > [ 467.561516] [drm:intel_dp_mode_set], Enabling DP audio on pipe B > [ 467.567503] [drm:intel_write_eld], ELD on [CONNECTOR:26:DP-3], [ENCODER:27:TMDS-27] > [ 467.574207] [drm:ironlake_write_eld], ELD on pipe B > [ 467.579346] [drm:ironlake_write_eld], Audio directed to unknown port > [ 467.584724] [drm:ironlake_write_eld], ELD: DisplayPort detected > [ 467.586540] HDMI hot plug event: Codec=3 Pin=7 Presence_Detect=1 ELD_Valid=0 > [ 467.599608] [drm:ironlake_write_eld], > [ 467.599922] HDMI status: Codec=3 Pin=7 Presence_Detect=1 ELD_Valid=0 > [ 467.605834] ELD size 9 > [ 467.610434] [drm:sandybridge_update_wm], FIFO watermarks For pipe A - plane 7, cursor: 6 > [ 467.612365] HDMI hot plug event: Codec=3 Pin=7 Presence_Detect=1 ELD_Valid=1 > [ 467.620654] [drm:sandybridge_update_wm], > [ 467.620765] HDMI status: Codec=3 Pin=7 Presence_Detect=1 ELD_Valid=1
