[Intel-gfx] [PATCH 1/6] drm/i915/bxt: VBT changes for hpd as wakeup feature

[Animesh Manna]

To support hpd during sleep a new feature flag is
added in vbt and also in dev_priv for enabling/disabling
inside deiver. By default this feature will be
diabled and based on oem request this feature can
be enabled by changing vbt feature flag.

Signed-off-by: Animesh Manna <animesh.manna at intel.com>
Signed-off-by: A.Sunil Kamath <sunil.kamath at intel.com>
---
 drivers/gpu/drm/i915/i915_drv.h       | 8 ++++++++
 drivers/gpu/drm/i915/i915_reg.h       | 1 +
 drivers/gpu/drm/i915/intel_vbt_defs.h | 3 ++-
 3 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index dd18772..445b80b 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1429,6 +1429,11 @@ enum psr_lines_to_wait {
 	PSR_8_LINES_TO_WAIT
 };
 
+enum hpd_wakeup_state {
+	DISABLE_HOT_PLUG_AS_WAKE_EVENT = 0,
+	ENABLE_HOT_PLUG_AS_WAKE_EVENT
+};
+
 struct intel_vbt_data {
 	struct drm_display_mode *lfp_lvds_vbt_mode; /* if any */
 	struct drm_display_mode *sdvo_lvds_vbt_mode; /* if any */
@@ -1485,6 +1490,9 @@ struct intel_vbt_data {
 		const u8 *sequence[MIPI_SEQ_MAX];
 	} dsi;
 
+	/* HPD as wakesoure for DC9 BXT */
+	enum hpd_wakeup_state hpd_wakeup_enabled;
+
 	int crt_ddc_pin;
 
 	int child_dev_num;
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 12f5103..cc42bd9 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -6119,6 +6119,7 @@ enum skl_disp_power_wells {
 				 SDE_PORTB_HOTPLUG |	\
 				 SDE_PORTC_HOTPLUG |	\
 				 SDE_PORTD_HOTPLUG)
+
 #define SDE_TRANSB_CRC_DONE	(1 << 5)
 #define SDE_TRANSB_CRC_ERR	(1 << 4)
 #define SDE_TRANSB_FIFO_UNDER	(1 << 3)
diff --git a/drivers/gpu/drm/i915/intel_vbt_defs.h b/drivers/gpu/drm/i915/intel_vbt_defs.h
index 749dcea..8e2b765 100644
--- a/drivers/gpu/drm/i915/intel_vbt_defs.h
+++ b/drivers/gpu/drm/i915/intel_vbt_defs.h
@@ -547,7 +547,8 @@ struct bdb_driver_features {
 	u16 tbt_enabled:1;
 	u16 psr_enabled:1;
 	u16 ips_enabled:1;
-	u16 reserved3:4;
+	u16 reserved3:3;
+	u16 hpd_wakeup_source:1;
 	u16 pc_feature_valid:1;
 } __packed;
 
-- 
2.0.2