[PATCH 3/7] drm/i915: Set link status property for DP connector

[Manasi Navare]

This defines a helper function to set the property value.
This will be used to set the link status to Bad in case
of link training failures.

Cc: dri-devel at lists.freedesktop.org
Cc: Jani Nikula <jani.nikula at linux.intel.com>
Cc: Daniel Vetter <daniel.vetter at intel.com>
Cc: Ville Syrjala <ville.syrjala at linux.intel.com>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
Signed-off-by: Manasi Navare <manasi.d.navare at intel.com>
---
 drivers/gpu/drm/i915/intel_dp.c  | 16 ++++++++++++++++
 drivers/gpu/drm/i915/intel_drv.h |  2 ++
 2 files changed, 18 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 3c2293b..795897c 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -4673,6 +4673,22 @@ static int intel_dp_get_modes(struct drm_connector *connector)
 	return 0;
 }
 
+int
+intel_dp_set_link_status_property(struct drm_connector *connector,
+				  uint64_t val)
+{
+	struct drm_device *dev = connector->dev;
+	int ret = 0;
+
+	ret = drm_object_property_set_value(&connector->base,
+					    dev->mode_config.link_status_property,
+					    val);
+	if (ret)
+		return ret;
+
+	return ret;
+}
+
 static int
 intel_dp_connector_register(struct drm_connector *connector)
 {
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 7dda79d..f6fe05a 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1397,6 +1397,8 @@ u32 skl_plane_stride(const struct drm_framebuffer *fb, int plane,
 bool intel_dp_init(struct drm_device *dev, i915_reg_t output_reg, enum port port);
 bool intel_dp_init_connector(struct intel_digital_port *intel_dig_port,
 			     struct intel_connector *intel_connector);
+int intel_dp_set_link_status_property(struct drm_connector *connector,
+				      uint64_t val);
 void intel_dp_set_link_params(struct intel_dp *intel_dp,
 			      int link_rate, uint8_t lane_count,
 			      bool link_mst);
-- 
1.9.1