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eb66553d35
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Jani Nikula eb66553d35 drm/i915/bios: set default backlight controller index 
With backlight controller set to -1 in intel_panel_init_alloc() to
distinguish uninitialized values, and controller later being set only if
it's present in VBT, we can end up with -1 for the controller:

    [drm:intel_bios_init_panel [i915]] VBT backlight PWM modulation
    frequency 200 Hz, active high, min brightness 0, level 255,
    controller 4294967295

There's no harm if it happens on platforms that ignore controller due to
only one backlight controller being present, like on VLV above, but play
it safe.

Fixes: bf38bba3e7 ("drm/i915: Try to use the correct power sequencer intiially on bxt/glk")
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230207111626.1839645-1-jani.nikula@intel.com
(cherry picked from commit a0dcb06d29)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2023-02-15 17:33:07 +02:00
..
drm drm/i915/bios: set default backlight controller index 2023-02-15 17:33:07 +02:00
host1x gpu: host1x: Use tegra_dev_iommu_get_stream_id() 2023-01-27 17:41:49 +01:00
ipu-v3 gpu: ipu-v3: common: Add of_node_put() for reference returned by of_graph_get_port_by_id() 2022-12-16 18:40:29 +01:00
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