drm/i915: Check backlight type while doing eDP backlight initializaiton
authorLee Shawn C <shawn.c.lee@intel.com>
Thu, 20 Jun 2019 15:44:16 +0000 (08:44 -0700)
committerJani Nikula <jani.nikula@intel.com>
Wed, 26 Jun 2019 14:48:12 +0000 (17:48 +0300)
commit5ccf2027bb9362f8c4909e980e3856451a55dcb2
tree39c3c521fd78c1dd7037819039bb7dce60c3534a
parent93d7a3b4be30c705c39377b9e75b24a184f6c4fe
drm/i915: Check backlight type while doing eDP backlight initializaiton

If LFP backlight type setting from VBT was "VESA eDP AUX Interface".
Driver should check panel capability and try to initialize aux backlight.
No matter i915_modparams.enable_dpcd_backlight was enabled or not.

v2: access dev_priv->vbt.backlight.type directly and remove unused function.
v3: 1. Modify i915.enable_dpcd_backlight type from bool to int and give default
       value as 0 (disable).
    2. Add a judgement to check LFP backlight type was aux interface or not.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Jose Roberto de Souza <jose.souza@intel.com>
Cc: Cooper Chiou <cooper.chiou@intel.com>
Signed-off-by: Lee Shawn C <shawn.c.lee@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1561045456-12171-1-git-send-email-shawn.c.lee@intel.com
drivers/gpu/drm/i915/display/intel_bios.h
drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c
drivers/gpu/drm/i915/i915_params.c
drivers/gpu/drm/i915/i915_params.h