[Intel-gfx] [v12 03/15] drm/i915/display: Attach HDR property for capable Gen9 devices

[Uma Shankar]

Attach HDR property for Gen9 devices with MCA LSPCON
chips.

v2: Cleaned HDR property attachment logic based on capability
as per Jani Nikula's suggestion.

v3: Fixed the HDR property attachment logic as per the new changes
by Kai-Feng to align with lspcon detection failure on some devices.

v4: Add HDR proprty in late_register to handle lspcon detection,
as suggested by Ville.

v5: Init Lspcon only if advertized from BIOS.

v6: Added a Todo to plan a cleanup later, added Ville's RB.

Signed-off-by: Uma Shankar <uma.shankar at intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_dp.c     | 18 ++++++++++++++++++
 drivers/gpu/drm/i915/display/intel_lspcon.c |  2 +-
 drivers/gpu/drm/i915/display/intel_lspcon.h |  1 +
 3 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 3896d08c4177..5aaa06d73609 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -6774,6 +6774,8 @@ intel_dp_connector_register(struct drm_connector *connector)
 {
 	struct drm_i915_private *i915 = to_i915(connector->dev);
 	struct intel_dp *intel_dp = intel_attached_dp(to_intel_connector(connector));
+	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
+	struct intel_lspcon *lspcon = &dig_port->lspcon;
 	int ret;
 
 	ret = intel_connector_register(connector);
@@ -6787,6 +6789,22 @@ intel_dp_connector_register(struct drm_connector *connector)
 	ret = drm_dp_aux_register(&intel_dp->aux);
 	if (!ret)
 		drm_dp_cec_register_connector(&intel_dp->aux, connector);
+
+	if (!intel_bios_is_lspcon_present(i915, dig_port->base.port))
+		return ret;
+
+	/*
+	 * ToDo: Clean this up to handle lspcon init and resume more
+	 * efficiently and streamlined.
+	 */
+	if (lspcon_init(dig_port)) {
+		lspcon_detect_hdr_capability(lspcon);
+		if (lspcon->hdr_supported)
+			drm_object_attach_property(&connector->base,
+						   connector->dev->mode_config.hdr_output_metadata_property,
+						   0);
+	}
+
 	return ret;
 }
 
diff --git a/drivers/gpu/drm/i915/display/intel_lspcon.c b/drivers/gpu/drm/i915/display/intel_lspcon.c
index 641025f00286..f98891f058da 100644
--- a/drivers/gpu/drm/i915/display/intel_lspcon.c
+++ b/drivers/gpu/drm/i915/display/intel_lspcon.c
@@ -552,7 +552,7 @@ void lspcon_wait_pcon_mode(struct intel_lspcon *lspcon)
 	lspcon_wait_mode(lspcon, DRM_LSPCON_MODE_PCON);
 }
 
-static bool lspcon_init(struct intel_digital_port *dig_port)
+bool lspcon_init(struct intel_digital_port *dig_port)
 {
 	struct intel_dp *dp = &dig_port->dp;
 	struct intel_lspcon *lspcon = &dig_port->lspcon;
diff --git a/drivers/gpu/drm/i915/display/intel_lspcon.h b/drivers/gpu/drm/i915/display/intel_lspcon.h
index 98043ba50dd4..42ccb21c908f 100644
--- a/drivers/gpu/drm/i915/display/intel_lspcon.h
+++ b/drivers/gpu/drm/i915/display/intel_lspcon.h
@@ -15,6 +15,7 @@ struct intel_digital_port;
 struct intel_encoder;
 struct intel_lspcon;
 
+bool lspcon_init(struct intel_digital_port *dig_port);
 void lspcon_detect_hdr_capability(struct intel_lspcon *lspcon);
 void lspcon_resume(struct intel_digital_port *dig_port);
 void lspcon_wait_pcon_mode(struct intel_lspcon *lspcon);
-- 
2.26.2