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.
Cc: Ville Syrjälä <ville.syrj...@linux.intel.com> Cc: Jani Nikula <jani.nik...@intel.com> Cc: Jose Roberto de Souza <jose.so...@intel.com> Cc: Cooper Chiou <cooper.ch...@intel.com> Signed-off-by: Lee, Shawn C <shawn.c....@intel.com> --- drivers/gpu/drm/i915/display/intel_bios.h | 1 + drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c | 11 ++++++++++- 2 files changed, 11 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/display/intel_bios.h b/drivers/gpu/drm/i915/display/intel_bios.h index 4e42cfaf61a7..0b7be6389a07 100644 --- a/drivers/gpu/drm/i915/display/intel_bios.h +++ b/drivers/gpu/drm/i915/display/intel_bios.h @@ -42,6 +42,7 @@ enum intel_backlight_type { INTEL_BACKLIGHT_DISPLAY_DDI, INTEL_BACKLIGHT_DSI_DCS, INTEL_BACKLIGHT_PANEL_DRIVER_INTERFACE, + INTEL_BACKLIGHT_VESA_EDP_AUX_INTERFACE, }; struct edp_power_seq { diff --git a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c index 7ded95a334db..0cca5b732ccf 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c +++ b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c @@ -261,11 +261,20 @@ intel_dp_aux_display_control_capable(struct intel_connector *connector) return false; } +static bool +intel_dp_bios_use_aux_backlight(struct drm_i915_private *dev_priv) +{ + if (dev_priv->vbt.backlight.type == INTEL_BACKLIGHT_VESA_EDP_AUX_INTERFACE) + return true; + return false; +} + int intel_dp_aux_init_backlight_funcs(struct intel_connector *intel_connector) { struct intel_panel *panel = &intel_connector->panel; - if (!i915_modparams.enable_dpcd_backlight) + if (!i915_modparams.enable_dpcd_backlight && + !intel_dp_bios_use_aux_backlight(to_i915(intel_connector->base.dev))) return -ENODEV; if (!intel_dp_aux_display_control_capable(intel_connector)) -- 2.7.4 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx