[PATCH v1 03/10] drm/rockchip: analogix_dp: Add support for RK3588

[Damon Ding]

RK3588 integrates the analogix eDP 1.3 TX controller IP and the HDMI/eDP
TX Combo PHY based on a Samsung IP block.

Add just the basic support for now, i.e. RGB output up to 4K at 60Hz, without
the tests of audio, PSR and other eDP 1.3 specific features.

Signed-off-by: Damon Ding <damon.ding at rock-chips.com>
---
 .../gpu/drm/rockchip/analogix_dp-rockchip.c   | 41 +++++++++++++++++--
 include/drm/bridge/analogix_dp.h              |  3 +-
 2 files changed, 40 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
index edb08a816c3f..e5792deb7885 100644
--- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
+++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
@@ -51,10 +51,12 @@ struct rockchip_grf_reg_field {
 /**
  * struct rockchip_dp_chip_data - splite the grf setting of kind of chips
  * @lcdc_sel: grf register field of lcdc_sel
+ * @edp_mode: grf register field of edp_mode
  * @chip_type: specific chip type
  */
 struct rockchip_dp_chip_data {
 	const struct rockchip_grf_reg_field lcdc_sel;
+	const struct rockchip_grf_reg_field edp_mode;
 	u32	chip_type;
 };
 
@@ -134,12 +136,21 @@ static int rockchip_dp_poweron(struct analogix_dp_plat_data *plat_data)
 		return ret;
 	}
 
+	ret = rockchip_grf_field_write(dp->grf, &dp->data->edp_mode, 1);
+	if (ret != 0)
+		DRM_DEV_ERROR(dp->dev, "failed to set edp mode %d\n", ret);
+
 	return ret;
 }
 
 static int rockchip_dp_powerdown(struct analogix_dp_plat_data *plat_data)
 {
 	struct rockchip_dp_device *dp = pdata_encoder_to_dp(plat_data);
+	int ret;
+
+	ret = rockchip_grf_field_write(dp->grf, &dp->data->edp_mode, 0);
+	if (ret != 0)
+		DRM_DEV_ERROR(dp->dev, "failed to set edp mode %d\n", ret);
 
 	clk_disable_unprepare(dp->pclk);
 
@@ -203,6 +214,10 @@ static void rockchip_dp_drm_encoder_enable(struct drm_encoder *encoder,
 	struct rockchip_dp_device *dp = encoder_to_dp(encoder);
 	struct drm_crtc *crtc;
 	struct drm_crtc_state *old_crtc_state;
+	struct of_endpoint endpoint;
+	struct device_node *remote_port, *remote_port_parent;
+	char name[32];
+	u32 port_id;
 	int ret;
 
 	crtc = rockchip_dp_drm_get_new_crtc(encoder, state);
@@ -220,13 +235,27 @@ static void rockchip_dp_drm_encoder_enable(struct drm_encoder *encoder,
 		return;
 	}
 
-	ret = drm_of_encoder_active_endpoint_id(dp->dev->of_node, encoder);
+	ret = drm_of_encoder_active_endpoint(dp->dev->of_node, encoder, &endpoint);
 	if (ret < 0)
 		return;
 
-	DRM_DEV_DEBUG(dp->dev, "vop %s output to dp\n", (ret) ? "LIT" : "BIG");
+	remote_port_parent = of_graph_get_remote_port_parent(endpoint.local_node);
+	if (remote_port_parent) {
+		if (of_get_child_by_name(remote_port_parent, "ports")) {
+			remote_port = of_graph_get_remote_port(endpoint.local_node);
+			of_property_read_u32(remote_port, "reg", &port_id);
+			of_node_put(remote_port);
+			sprintf(name, "%s vp%d", remote_port_parent->full_name, port_id);
+		} else {
+			sprintf(name, "%s %s",
+				remote_port_parent->full_name, endpoint.id ? "vopl" : "vopb");
+		}
+		of_node_put(remote_port_parent);
+
+		DRM_DEV_DEBUG(dp->dev, "%s output to edp\n", name);
+	}
 
-	ret = rockchip_grf_field_write(dp->grf, &dp->data->lcdc_sel, ret);
+	ret = rockchip_grf_field_write(dp->grf, &dp->data->lcdc_sel, endpoint.id);
 	if (ret != 0)
 		DRM_DEV_ERROR(dp->dev, "Could not write to GRF: %d\n", ret);
 
@@ -474,9 +503,15 @@ static const struct rockchip_dp_chip_data rk3288_dp = {
 	.lcdc_sel = GRF_REG_FIELD(0x025c, 5, 5),
 };
 
+static const struct rockchip_dp_chip_data rk3588_edp = {
+	.edp_mode = GRF_REG_FIELD(0x0000, 0, 0),
+	.chip_type = RK3588_EDP,
+};
+
 static const struct of_device_id rockchip_dp_dt_ids[] = {
 	{.compatible = "rockchip,rk3288-dp", .data = &rk3288_dp },
 	{.compatible = "rockchip,rk3399-edp", .data = &rk3399_edp },
+	{.compatible = "rockchip,rk3588-edp", .data = &rk3588_edp },
 	{}
 };
 MODULE_DEVICE_TABLE(of, rockchip_dp_dt_ids);
diff --git a/include/drm/bridge/analogix_dp.h b/include/drm/bridge/analogix_dp.h
index 6002c5666031..54086cb2d97d 100644
--- a/include/drm/bridge/analogix_dp.h
+++ b/include/drm/bridge/analogix_dp.h
@@ -15,11 +15,12 @@ enum analogix_dp_devtype {
 	EXYNOS_DP,
 	RK3288_DP,
 	RK3399_EDP,
+	RK3588_EDP,
 };
 
 static inline bool is_rockchip(enum analogix_dp_devtype type)
 {
-	return type == RK3288_DP || type == RK3399_EDP;
+	return type == RK3288_DP || type == RK3399_EDP || type == RK3588_EDP;
 }
 
 struct analogix_dp_plat_data {
-- 
2.34.1