diff options
| author | Jani Nikula | 2023-02-07 13:16:26 +0200 |
|---|---|---|
| committer | Jani Nikula | 2023-02-15 17:33:07 +0200 |
| commit | eb66553d356b44c08db56fd5ecea162cfe4bf8fd (patch) | |
| tree | 240af133ad5349293dd97c0f676fd27c6e794ae4 /drivers/gpu | |
| parent | c90b155148e9632ae46e6778ee958c319457415f (diff) | |
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: bf38bba3e7d6 ("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 a0dcb06d29d9e477e1984dc3859e61568361fc1a)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_bios.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_bios.c b/drivers/gpu/drm/i915/display/intel_bios.c index 1cd8af88ce50..04b846440de6 100644 --- a/drivers/gpu/drm/i915/display/intel_bios.c +++ b/drivers/gpu/drm/i915/display/intel_bios.c @@ -1033,6 +1033,7 @@ parse_lfp_backlight(struct drm_i915_private *i915, } panel->vbt.backlight.type = INTEL_BACKLIGHT_DISPLAY_DDI; + panel->vbt.backlight.controller = 0; if (i915->display.vbt.version >= 191) { size_t exp_size; |