[Intel-gfx] [PATCH v4 3/5] drm/i915/bios: Parse HOBL parameter

[José Roberto de Souza]

HOBL means hours of battery life, it is a power-saving feature
were supported motherboards can use a special voltage swing table
that uses less power.

So here parsing the VBT to check if this feature is supported.

BSpec: 20150
Reviewed-by: Anusha Srivatsa <anusha.srivatsa at intel.com>
Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
---
 drivers/gpu/drm/i915/display/intel_bios.c     | 3 +++
 drivers/gpu/drm/i915/display/intel_vbt_defs.h | 1 +
 drivers/gpu/drm/i915/i915_drv.h               | 1 +
 3 files changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_bios.c b/drivers/gpu/drm/i915/display/intel_bios.c
index 6593e2c38043..c53c85d38fa5 100644
--- a/drivers/gpu/drm/i915/display/intel_bios.c
+++ b/drivers/gpu/drm/i915/display/intel_bios.c
@@ -722,6 +722,9 @@ parse_power_conservation_features(struct drm_i915_private *dev_priv,
 	 */
 	if (!(power->drrs & BIT(panel_type)))
 		dev_priv->vbt.drrs_type = DRRS_NOT_SUPPORTED;
+
+	if (bdb->version >= 232)
+		dev_priv->vbt.edp.hobl = power->hobl & BIT(panel_type);
 }
 
 static void
diff --git a/drivers/gpu/drm/i915/display/intel_vbt_defs.h b/drivers/gpu/drm/i915/display/intel_vbt_defs.h
index aef7fe932d1a..6faabd4f6d49 100644
--- a/drivers/gpu/drm/i915/display/intel_vbt_defs.h
+++ b/drivers/gpu/drm/i915/display/intel_vbt_defs.h
@@ -820,6 +820,7 @@ struct bdb_lfp_power {
 	u16 adb;
 	u16 lace_enabled_status;
 	struct agressiveness_profile_entry aggressivenes[16];
+	u16 hobl; /* 232+ */
 } __packed;
 
 /*
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 2c2e88d49f3e..5b100c2df8df 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -692,6 +692,7 @@ struct intel_vbt_data {
 		bool initialized;
 		int bpp;
 		struct edp_power_seq pps;
+		bool hobl;
 	} edp;
 
 	struct {
-- 
2.27.0