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
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