[PATCH RFC 10/25] drm/rockchip: dw_hdmi_qp: Add VRR support

[Nicolas Frattaroli]

Register the vrr_capable property on the connector for RK3588, where VRR
is implemented.

In the encoder's atomic_check callback, the vrr_capable property, if
present, is then set to true if the sink supports VRR.

Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli at collabora.com>
---
 drivers/gpu/drm/rockchip/dw_hdmi_qp-rockchip.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/gpu/drm/rockchip/dw_hdmi_qp-rockchip.c b/drivers/gpu/drm/rockchip/dw_hdmi_qp-rockchip.c
index 9c4cf68d79d5..2b9432aa8c54 100644
--- a/drivers/gpu/drm/rockchip/dw_hdmi_qp-rockchip.c
+++ b/drivers/gpu/drm/rockchip/dw_hdmi_qp-rockchip.c
@@ -192,6 +192,7 @@ dw_hdmi_qp_rockchip_encoder_atomic_check(struct drm_encoder *encoder,
 					 struct drm_crtc_state *crtc_state,
 					 struct drm_connector_state *conn_state)
 {
+	struct drm_connector *connector = conn_state->connector;
 	struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
 	struct rockchip_hdmi_qp *hdmi = to_rockchip_hdmi_qp(encoder);
 	union phy_configure_opts phy_cfg = {};
@@ -238,6 +239,10 @@ dw_hdmi_qp_rockchip_encoder_atomic_check(struct drm_encoder *encoder,
 		dev_err(hdmi->dev, "Failed to configure phy: %d\n", ret);
 	}
 
+	if (connector->vrr_capable_property)
+		drm_connector_set_vrr_capable_property(connector,
+			drm_display_info_is_vrr_capable(&connector->display_info));
+
 	return ret;
 }
 
@@ -515,6 +520,7 @@ struct rockchip_hdmi_qp_cfg {
 	unsigned int port_ids[MAX_HDMI_PORT_NUM];
 	const struct rockchip_hdmi_qp_ctrl_ops *ctrl_ops;
 	const struct dw_hdmi_qp_phy_ops *phy_ops;
+	bool supports_vrr;
 };
 
 static const struct rockchip_hdmi_qp_cfg rk3576_hdmi_cfg = {
@@ -534,6 +540,7 @@ static const struct rockchip_hdmi_qp_cfg rk3588_hdmi_cfg = {
 	},
 	.ctrl_ops = &rk3588_hdmi_ctrl_ops,
 	.phy_ops = &rk3588_hdmi_phy_ops,
+	.supports_vrr = true,
 };
 
 static const struct of_device_id dw_hdmi_qp_rockchip_dt_ids[] = {
@@ -695,6 +702,13 @@ static int dw_hdmi_qp_rockchip_bind(struct device *dev, struct device *master,
 		return dev_err_probe(hdmi->dev, PTR_ERR(connector),
 				     "Failed to init bridge connector\n");
 
+	if (cfg->supports_vrr) {
+		ret = drm_connector_attach_vrr_capable_property(connector);
+		if (ret)
+			return dev_err_probe(hdmi->dev, ret,
+					     "Failed to attach 'vrr_capable' property\n");
+	}
+
 	return 0;
 }
 

-- 
2.55.0