drm/i915: Do panel VBT init early if the VBT declares an explicit panel type

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Lots of ADL machines out there with bogus VBTs that declare
two eDP child devices. In order for those to work we need to
figure out which power sequencer to use before we try the EDID
read. So let's do the panel VBT init early if we can, falling
back to the post-EDID init otherwise.

The post-EDID init panel_type=0xff approach of assuming the
power sequencer should already be enabled doesn't really work
with multiple eDP panels, and currently we just end up using
the same power sequencer for both eDP ports, which at least
confuses the wakeref tracking, and potentially also causes us
to toggle the VDD for the panel when we should not.

Cc: Animesh Manna <animesh.manna@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221125173156.31689-3-ville.syrjala@linux.intel.com

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This commit is contained in:

Ville Syrjälä 2022-11-25 19:31:49 +02:00

parent f70f8153e3

commit 3f9ffce576

9 changed files with 61 additions and 26 deletions

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2

drivers/gpu/drm/i915/display/icl_dsi.c

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drivers/gpu/drm/i915/display/intel_bios.c

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drivers/gpu/drm/i915/display/intel_bios.h

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drivers/gpu/drm/i915/display/intel_display_types.h

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drivers/gpu/drm/i915/display/intel_dp.c

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drivers/gpu/drm/i915/display/intel_lvds.c

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drivers/gpu/drm/i915/display/intel_panel.c

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drivers/gpu/drm/i915/display/intel_sdvo.c

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drivers/gpu/drm/i915/display/vlv_dsi.c

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