[PATCH v3 10/12] video: rockchip: Add HDMI support for RK3568

[Dang Huynh <danct12@riseup.net>]

HDMI on RK3568 is mostly simplified, all this does is enabling
DDC for display timings and HPD.

Signed-off-by: Dang Huynh <danct12@riseup.net>
---
 drivers/video/rockchip/Makefile      |  1 +
 drivers/video/rockchip/rk3568_hdmi.c | 71 ++++++++++++++++++++++++++++++++++++
 2 files changed, 72 insertions(+)

diff --git a/drivers/video/rockchip/Makefile b/drivers/video/rockchip/Makefile
index 2f89a979a2848733be5a6d05817ad76ce3ad3a34..b751c969b46f1933e91a6c0434f31227a709d8e5 100644
--- a/drivers/video/rockchip/Makefile
+++ b/drivers/video/rockchip/Makefile
@@ -14,6 +14,7 @@ obj-$(CONFIG_DISPLAY_ROCKCHIP_LVDS) += rk_lvds.o
 obj-hdmi-$(CONFIG_ROCKCHIP_RK3288) += rk3288_hdmi.o
 obj-hdmi-$(CONFIG_ROCKCHIP_RK3328) += rk3328_hdmi.o
 obj-hdmi-$(CONFIG_ROCKCHIP_RK3399) += rk3399_hdmi.o
+obj-hdmi-$(CONFIG_ROCKCHIP_RK3568) += rk3568_hdmi.o
 obj-$(CONFIG_DISPLAY_ROCKCHIP_HDMI) += rk_hdmi.o $(obj-hdmi-y)
 obj-mipi-$(CONFIG_ROCKCHIP_RK3288) += rk3288_mipi.o
 obj-mipi-$(CONFIG_ROCKCHIP_RK3399) += rk3399_mipi.o
diff --git a/drivers/video/rockchip/rk3568_hdmi.c b/drivers/video/rockchip/rk3568_hdmi.c
new file mode 100644
index 0000000000000000000000000000000000000000..5578ea37243a5735713d92572639cdc8ba9865cf
--- /dev/null
+++ b/drivers/video/rockchip/rk3568_hdmi.c
@@ -0,0 +1,71 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2024 Dang Huynh <danct12@riseup.net>
+ */
+
+#include <display.h>
+#include <dm.h>
+#include <dw_hdmi.h>
+#include <edid.h>
+#include <asm/arch-rockchip/hardware.h>
+#include <asm/arch-rockchip/grf_rk3568.h>
+#include "rk_hdmi.h"
+
+#define RK3568_IO_DDC_IN_MSK             ((3 << 14) | (3 << (14 + 16)))
+
+static int rk3568_hdmi_enable(struct udevice *dev, int panel_bpp,
+			      const struct display_timing *edid)
+{
+	struct rk_hdmi_priv *priv = dev_get_priv(dev);
+
+	return dw_hdmi_enable(&priv->hdmi, edid);
+}
+
+static int rk3568_hdmi_of_to_plat(struct udevice *dev)
+{
+	struct rk_hdmi_priv *priv = dev_get_priv(dev);
+	struct dw_hdmi *hdmi = &priv->hdmi;
+
+	hdmi->i2c_clk_high = 0x71;
+	hdmi->i2c_clk_low = 0x76;
+
+	return rk_hdmi_of_to_plat(dev);
+}
+
+static const char * const rk3568_hdmi_reg_names[] = {
+	"avdd-0v9",
+	"avdd-1v8"
+};
+
+static int rk3568_hdmi_probe(struct udevice *dev)
+{
+	struct rk_hdmi_priv *priv = dev_get_priv(dev);
+	struct rk3568_grf *grf = priv->grf;
+
+	rk_hdmi_probe_regulators(dev, rk3568_hdmi_reg_names,
+				 ARRAY_SIZE(rk3568_hdmi_reg_names));
+
+	writel(RK3568_IO_DDC_IN_MSK, &grf->vo_con1);
+
+	return rk_hdmi_probe(dev);
+}
+
+static const struct dm_display_ops rk3568_hdmi_ops = {
+	.read_edid = rk_hdmi_read_edid,
+	.enable = rk3568_hdmi_enable,
+};
+
+static const struct udevice_id rk3568_hdmi_ids[] = {
+	{ .compatible = "rockchip,rk3568-dw-hdmi" },
+	{ }
+};
+
+U_BOOT_DRIVER(rk3568_hdmi_rockchip) = {
+	.name = "rk3568_hdmi_rockchip",
+	.id = UCLASS_DISPLAY,
+	.of_match = rk3568_hdmi_ids,
+	.ops = &rk3568_hdmi_ops,
+	.of_to_plat = rk3568_hdmi_of_to_plat,
+	.probe = rk3568_hdmi_probe,
+	.priv_auto	= sizeof(struct rk_hdmi_priv),
+};

-- 
2.49.0