199 lines
5.0 KiB
Diff
199 lines
5.0 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Paolo Sabatino <paolo.sabatino@gmail.com>
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Date: Sun, 30 Jun 2024 17:37:39 +0200
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Subject: rk3228 hdmi driver
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---
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drivers/video/rockchip/Makefile | 1 +
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drivers/video/rockchip/rk3228_hdmi.c | 168 ++++++++++
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2 files changed, 169 insertions(+)
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diff --git a/drivers/video/rockchip/Makefile b/drivers/video/rockchip/Makefile
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index 111111111111..222222222222 100644
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--- a/drivers/video/rockchip/Makefile
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+++ b/drivers/video/rockchip/Makefile
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@@ -10,6 +10,7 @@ obj-$(CONFIG_ROCKCHIP_RK3328) += rk3328_vop.o
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obj-$(CONFIG_ROCKCHIP_RK3399) += rk3399_vop.o
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obj-$(CONFIG_DISPLAY_ROCKCHIP_EDP) += rk_edp.o
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obj-$(CONFIG_DISPLAY_ROCKCHIP_LVDS) += rk_lvds.o
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+obj-hdmi-$(CONFIG_ROCKCHIP_RK322X) += rk3228_hdmi.o
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obj-hdmi-$(CONFIG_ROCKCHIP_RK3288) += rk3288_hdmi.o
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obj-hdmi-$(CONFIG_ROCKCHIP_RK3328) += rk3328_hdmi.o
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obj-hdmi-$(CONFIG_ROCKCHIP_RK3399) += rk3399_hdmi.o
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diff --git a/drivers/video/rockchip/rk3228_hdmi.c b/drivers/video/rockchip/rk3228_hdmi.c
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new file mode 100644
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index 000000000000..111111111111
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--- /dev/null
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+++ b/drivers/video/rockchip/rk3228_hdmi.c
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@@ -0,0 +1,167 @@
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+// SPDX-License-Identifier: GPL-2.0+
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+/*
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+ * Copyright (c) 2023 Edgeble AI Technologies Pvt. Ltd.
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+ */
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+#include <clk.h>
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+#include <display.h>
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+#include <reset.h>
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+#include <linux/delay.h>
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+#include <dm.h>
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+#include <dw_hdmi.h>
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+#include <asm/io.h>
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+#include "rk_hdmi.h"
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+
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+#define HIWORD_UPDATE(val, mask) (val | (mask) << 16)
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+
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+#define RK3228_GRF_SOC_CON2 0x0408
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+#define RK3228_GRF_SOC_CON6 0x0418
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+
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+#define RK3228_HDMI_HPD_VSEL BIT(6)
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+#define RK3228_HDMI_SDA_VSEL BIT(5)
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+#define RK3228_HDMI_SCL_VSEL BIT(4)
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+
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+#define RK3228_HDMI_SDAIN_MSK BIT(14)
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+#define RK3228_HDMI_SCLIN_MSK BIT(13)
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+
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+static int rk3228_hdmi_enable(struct udevice *dev, int panel_bpp,
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+ const struct display_timing *edid)
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+{
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+ struct rk_hdmi_priv *priv = dev_get_priv(dev);
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+
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+ return dw_hdmi_enable(&priv->hdmi, edid);
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+}
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+
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+static int rk3228_dw_hdmi_phy_cfg(struct dw_hdmi *hdmi, uint pixclock)
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+{
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+ struct rk_hdmi_priv *priv = container_of(hdmi, struct rk_hdmi_priv, hdmi);
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+ int ret;
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+
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+ ret = generic_phy_init(&priv->phy);
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+ if (ret < 0) {
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+ printf("failed to init phy (ret=%d)\n", ret);
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+ return ret;
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+ }
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+
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+ ret = generic_phy_power_on(&priv->phy);
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+ if (ret) {
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+ printf("failed to power on hdmi phy (ret=%d)\n", ret);
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+ return ret;
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+ }
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+
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+ return 0;
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+}
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+
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+static void rk3228_dw_hdmi_setup_hpd(struct dw_hdmi *hdmi)
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+{
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+ struct rk_hdmi_priv *priv = container_of(hdmi, struct rk_hdmi_priv, hdmi);
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+ void *grf = priv->grf;
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+
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+ /*
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+ * Undocumented registers, write them to get correct access to EDID
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+ */
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+ writel(HIWORD_UPDATE(RK3228_HDMI_HPD_VSEL | RK3228_HDMI_SDA_VSEL | RK3228_HDMI_SCL_VSEL,
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+ RK3228_HDMI_HPD_VSEL | RK3228_HDMI_SDA_VSEL | RK3228_HDMI_SCL_VSEL),
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+ grf + RK3228_GRF_SOC_CON6);
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+
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+ writel(HIWORD_UPDATE(RK3228_HDMI_SDAIN_MSK | RK3228_HDMI_SCLIN_MSK,
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+ RK3228_HDMI_SDAIN_MSK | RK3228_HDMI_SCLIN_MSK),
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+ grf + RK3228_GRF_SOC_CON2);
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+
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+}
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+
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+static const struct dw_hdmi_phy_ops dw_hdmi_rk3228_phy_ops = {
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+ .phy_set = rk3228_dw_hdmi_phy_cfg,
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+ .setup_hpd = rk3228_dw_hdmi_setup_hpd,
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+};
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+
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+static int rk3228_hdmi_of_to_plat(struct udevice *dev)
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+{
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+ struct rk_hdmi_priv *priv = dev_get_priv(dev);
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+ struct dw_hdmi *hdmi = &priv->hdmi;
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+
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+ hdmi->i2c_clk_high = 0x71;
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+ hdmi->i2c_clk_low = 0x76;
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+
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+ rk_hdmi_of_to_plat(dev);
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+
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+ hdmi->ops = &dw_hdmi_rk3228_phy_ops;
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+
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+ return 0;
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+}
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+
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+static int rk3228_hdmi_probe(struct udevice *dev)
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+{
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+ struct rk_hdmi_priv *priv = dev_get_priv(dev);
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+ int ret;
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+
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+ ret = generic_phy_get_by_name(dev, "hdmi", &priv->phy);
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+ if (ret) {
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+ printf("failed to get hdmi phy\n");
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+ return ret;
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+ };
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+
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+ ret = rk_hdmi_probe(dev);
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+ if (ret) {
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+ printf("failed to probe rk hdmi\n");
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+ return ret;
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+ }
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+
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+ return 0;
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+}
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+
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+/*
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+ * Asserting and deasserting the HDMI resets allows the vendor kernel
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+ * to turn on HDMI when necessary. Mainline kernel does not need it though
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+ */
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+static int rk3228_hdmi_remove(struct udevice *dev)
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+{
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+ struct rk_hdmi_priv *priv = dev_get_priv(dev);
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+ struct reset_ctl_bulk resets;
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+ int ret;
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+
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+ debug("%s\n", __func__);
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+
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+ dw_hdmi_disable(&priv->hdmi);
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+
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+ ret = generic_phy_power_off(&priv->phy);
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+ if (ret) {
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+ printf("failed to on hdmi phy (ret=%d)\n", ret);
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+ }
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+
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+ ret = reset_get_bulk(dev, &resets);
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+ if (ret) {
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+ printf("failed to get resets (ret=%d)\n", ret);
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+ return ret;
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+ }
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+
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+ reset_assert_bulk(&resets);
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+ udelay(20);
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+
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+ reset_deassert_bulk(&resets);
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+ udelay(20);
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+
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+ return 0;
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+
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+}
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+
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+static const struct dm_display_ops rk3228_hdmi_ops = {
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+ .read_edid = rk_hdmi_read_edid,
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+ .enable = rk3228_hdmi_enable,
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+};
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+
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+static const struct udevice_id rk3228_hdmi_ids[] = {
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+ { .compatible = "rockchip,rk3228-dw-hdmi" },
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+ { }
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+};
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+
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+U_BOOT_DRIVER(rk3228_hdmi_rockchip) = {
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+ .name = "rk3228_hdmi_rockchip",
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+ .id = UCLASS_DISPLAY,
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+ .of_match = rk3228_hdmi_ids,
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+ .ops = &rk3228_hdmi_ops,
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+ .of_to_plat = rk3228_hdmi_of_to_plat,
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+ .probe = rk3228_hdmi_probe,
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+ .priv_auto = sizeof(struct rk_hdmi_priv),
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+ .remove = rk3228_hdmi_remove,
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+ .flags = DM_FLAG_OS_PREPARE
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+};
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--
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Armbian
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