The latest VBT support backlight control via aux. We have to
check VBT's setting before doing backlight initialization.
Then Driver will assign correct callback function for eDP
backlight control.
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/intel_bios.c | 3 ++-
drivers/gpu/drm/i915/intel_vbt_defs.h | 6 ++++--
2 files changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_bios.c
b/drivers/gpu/drm/i915/intel_bios.c
index 1c037dfa83f5..27bda45520ec 100644
--- a/drivers/gpu/drm/i915/intel_bios.c
+++ b/drivers/gpu/drm/i915/intel_bios.c
@@ -317,7 +317,8 @@ parse_lfp_backlight(struct drm_i915_private *dev_priv,
entry = &backlight_data->data[panel_type];
- dev_priv->vbt.backlight.present = entry->type == BDB_BACKLIGHT_TYPE_PWM;
+ dev_priv->vbt.backlight.present = (entry->type ==
BDB_BACKLIGHT_TYPE_PWM_SOC ||
+ entry->type ==
BDB_BACKLIGHT_TYPE_PWM_VESA_EDP_AUX);
if (!dev_priv->vbt.backlight.present) {
DRM_DEBUG_KMS("PWM backlight not present in VBT (type %u)\n",
entry->type);
diff --git a/drivers/gpu/drm/i915/intel_vbt_defs.h
b/drivers/gpu/drm/i915/intel_vbt_defs.h
index 89ef14cafb6b..710f539f17de 100644
--- a/drivers/gpu/drm/i915/intel_vbt_defs.h
+++ b/drivers/gpu/drm/i915/intel_vbt_defs.h
@@ -760,8 +760,10 @@ struct bdb_lvds_lfp_data {
* Block 43 - LFP Backlight Control Data Block
*/
-#define BDB_BACKLIGHT_TYPE_NONE 0
-#define BDB_BACKLIGHT_TYPE_PWM 2
+#define BDB_BACKLIGHT_TYPE_NONE 0
+#define BDB_BACKLIGHT_TYPE_PWM_SOC 2
+#define BDB_BACKLIGHT_TYPE_PWM_PANEL_DRIVER_OLED 4
+#define BDB_BACKLIGHT_TYPE_PWM_VESA_EDP_AUX 5
struct lfp_backlight_data_entry {
u8 type:2;
--
2.7.4
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