To support hpd during sleep a new feature flag is
added in vbt and also in dev_priv for enabling/disabling
inside driver. By default this feature will be
disabled and based on oem request this feature can
be enabled by changing vbt feature flag.
v1: Initial version as RFC.
v2: Based on review comments from Jani,
- Used bool instead of enum for hpd feature flag.
- Updating feature flag at the first place based on vbt
entry.
v3: Based on review comment from Jani,
- removed the if condition check, directly update driver flag
with vbt feature flag.
Signed-off-by: Animesh Manna <animesh.manna@xxxxxxxxx>
Signed-off-by: A.Sunil Kamath <sunil.kamath@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_drv.h | 3 +++
drivers/gpu/drm/i915/intel_bios.c | 4 ++++
drivers/gpu/drm/i915/intel_vbt_defs.h | 3 ++-
3 files changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 77d7a07..651a013 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1743,6 +1743,9 @@ struct intel_vbt_data {
const u8 *sequence[MIPI_SEQ_MAX];
} dsi;
+ /* HPD as wakesoure for DC9 BXT */
+ bool hpd_wakeup_enabled;
+
int crt_ddc_pin;
int child_dev_num;
diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c
index 1cf2fa6..aacbd62 100644
--- a/drivers/gpu/drm/i915/intel_bios.c
+++ b/drivers/gpu/drm/i915/intel_bios.c
@@ -559,6 +559,10 @@ parse_driver_features(struct drm_i915_private *dev_priv,
if (driver->lvds_config == BDB_DRIVER_FEATURE_EDP)
dev_priv->vbt.edp.support = 1;
+ dev_priv->vbt.hpd_wakeup_enabled = driver->hpd_wakeup_source;
+ DRM_DEBUG_KMS("HPD as wakeup source:%s\n",
+ yesno(driver->hpd_wakeup_source));
+
DRM_DEBUG_KMS("DRRS State Enabled:%d\n", driver->drrs_enabled);
/*
* If DRRS is not supported, drrs_type has to be set to 0.
diff --git a/drivers/gpu/drm/i915/intel_vbt_defs.h b/drivers/gpu/drm/i915/intel_vbt_defs.h
index 8886cab1..2072134 100644
--- a/drivers/gpu/drm/i915/intel_vbt_defs.h
+++ b/drivers/gpu/drm/i915/intel_vbt_defs.h
@@ -561,7 +561,8 @@ 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;
--
2.7.4
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