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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2016 Rockchip Inc.
*/
#include <common.h>
#include <display.h>
#include <dm.h>
#include <edid.h>
#include <panel.h>
#include <regmap.h>
#include <syscon.h>
#include <asm/gpio.h>
#include <asm/io.h>
#include <asm/arch-rockchip/clock.h>
#include <asm/arch-rockchip/grf_rk3288.h>
#include <asm/arch-rockchip/hardware.h>
#include <asm/arch-rockchip/lvds_rk3288.h>
#include <dt-bindings/clock/rk3288-cru.h>
#include <dt-bindings/video/rk3288.h>
DECLARE_GLOBAL_DATA_PTR;
/**
* struct rk_lvds_priv - private rockchip lvds display driver info
*
* @reg: LVDS register address
* @grf: GRF register
* @panel: Panel device that is used in driver
*
* @output: Output mode, decided single or double channel,
* LVDS or LVTLL
* @format: Data format that RGB data will packing as
*/
struct rk_lvds_priv {
void __iomem *regs;
struct rk3288_grf *grf;
struct udevice *panel;
int output;
int format;
};
static inline void lvds_writel(struct rk_lvds_priv *lvds, u32 offset, u32 val)
{
writel(val, lvds->regs + offset);
writel(val, lvds->regs + offset + 0x100);
}
int rk_lvds_enable(struct udevice *dev, int panel_bpp,
const struct display_timing *edid)
{
struct rk_lvds_priv *priv = dev_get_priv(dev);
struct display_plat *uc_plat = dev_get_uclass_platdata(dev);
int ret = 0;
unsigned int val = 0;
ret = panel_enable_backlight(priv->panel);
if (ret) {
debug("%s: backlight error: %d\n", __func__, ret);
return ret;
}
/* Select the video source */
if (uc_plat->source_id)
val = RK3288_LVDS_SOC_CON6_SEL_VOP_LIT |
(RK3288_LVDS_SOC_CON6_SEL_VOP_LIT << 16);
else
val = RK3288_LVDS_SOC_CON6_SEL_VOP_LIT << 16;
rk_setreg(&priv->grf->soc_con6, val);
/* Select data transfer format */
val = priv->format;
if (priv->output == LVDS_OUTPUT_DUAL)
val |= LVDS_DUAL | LVDS_CH0_EN | LVDS_CH1_EN;
else if (priv->output == LVDS_OUTPUT_SINGLE)
val |= LVDS_CH0_EN;
else if (priv->output == LVDS_OUTPUT_RGB)
val |= LVDS_TTL_EN | LVDS_CH0_EN | LVDS_CH1_EN;
val |= (0xffff << 16);
rk_setreg(&priv->grf->soc_con7, val);
/* Enable LVDS PHY */
if (priv->output == LVDS_OUTPUT_RGB) {
lvds_writel(priv, RK3288_LVDS_CH0_REG0,
RK3288_LVDS_CH0_REG0_TTL_EN |
RK3288_LVDS_CH0_REG0_LANECK_EN |
RK3288_LVDS_CH0_REG0_LANE4_EN |
RK3288_LVDS_CH0_REG0_LANE3_EN |
RK3288_LVDS_CH0_REG0_LANE2_EN |
RK3288_LVDS_CH0_REG0_LANE1_EN |
RK3288_LVDS_CH0_REG0_LANE0_EN);
lvds_writel(priv, RK3288_LVDS_CH0_REG2,
RK3288_LVDS_PLL_FBDIV_REG2(0x46));
lvds_writel(priv, RK3288_LVDS_CH0_REG3,
RK3288_LVDS_PLL_FBDIV_REG3(0x46));
lvds_writel(priv, RK3288_LVDS_CH0_REG4,
RK3288_LVDS_CH0_REG4_LANECK_TTL_MODE |
RK3288_LVDS_CH0_REG4_LANE4_TTL_MODE |
RK3288_LVDS_CH0_REG4_LANE3_TTL_MODE |
RK3288_LVDS_CH0_REG4_LANE2_TTL_MODE |
RK3288_LVDS_CH0_REG4_LANE1_TTL_MODE |
RK3288_LVDS_CH0_REG4_LANE0_TTL_MODE);
lvds_writel(priv, RK3288_LVDS_CH0_REG5,
RK3288_LVDS_CH0_REG5_LANECK_TTL_DATA |
RK3288_LVDS_CH0_REG5_LANE4_TTL_DATA |
RK3288_LVDS_CH0_REG5_LANE3_TTL_DATA |
RK3288_LVDS_CH0_REG5_LANE2_TTL_DATA |
RK3288_LVDS_CH0_REG5_LANE1_TTL_DATA |
RK3288_LVDS_CH0_REG5_LANE0_TTL_DATA);
lvds_writel(priv, RK3288_LVDS_CH0_REGD,
RK3288_LVDS_PLL_PREDIV_REGD(0x0a));
lvds_writel(priv, RK3288_LVDS_CH0_REG20,
RK3288_LVDS_CH0_REG20_LSB);
} else {
lvds_writel(priv, RK3288_LVDS_CH0_REG0,
RK3288_LVDS_CH0_REG0_LVDS_EN |
RK3288_LVDS_CH0_REG0_LANECK_EN |
RK3288_LVDS_CH0_REG0_LANE4_EN |
RK3288_LVDS_CH0_REG0_LANE3_EN |
RK3288_LVDS_CH0_REG0_LANE2_EN |
RK3288_LVDS_CH0_REG0_LANE1_EN |
RK3288_LVDS_CH0_REG0_LANE0_EN);
lvds_writel(priv, RK3288_LVDS_CH0_REG1,
RK3288_LVDS_CH0_REG1_LANECK_BIAS |
RK3288_LVDS_CH0_REG1_LANE4_BIAS |
RK3288_LVDS_CH0_REG1_LANE3_BIAS |
RK3288_LVDS_CH0_REG1_LANE2_BIAS |
RK3288_LVDS_CH0_REG1_LANE1_BIAS |
RK3288_LVDS_CH0_REG1_LANE0_BIAS);
lvds_writel(priv, RK3288_LVDS_CH0_REG2,
RK3288_LVDS_CH0_REG2_RESERVE_ON |
RK3288_LVDS_CH0_REG2_LANECK_LVDS_MODE |
RK3288_LVDS_CH0_REG2_LANE4_LVDS_MODE |
RK3288_LVDS_CH0_REG2_LANE3_LVDS_MODE |
RK3288_LVDS_CH0_REG2_LANE2_LVDS_MODE |
RK3288_LVDS_CH0_REG2_LANE1_LVDS_MODE |
RK3288_LVDS_CH0_REG2_LANE0_LVDS_MODE |
RK3288_LVDS_PLL_FBDIV_REG2(0x46));
lvds_writel(priv, RK3288_LVDS_CH0_REG3,
RK3288_LVDS_PLL_FBDIV_REG3(0x46));
lvds_writel(priv, RK3288_LVDS_CH0_REG4, 0x00);
lvds_writel(priv, RK3288_LVDS_CH0_REG5, 0x00);
lvds_writel(priv, RK3288_LVDS_CH0_REGD,
RK3288_LVDS_PLL_PREDIV_REGD(0x0a));
lvds_writel(priv, RK3288_LVDS_CH0_REG20,
RK3288_LVDS_CH0_REG20_LSB);
}
/* Power on */
writel(RK3288_LVDS_CFG_REGC_PLL_ENABLE,
priv->regs + RK3288_LVDS_CFG_REGC);
writel(RK3288_LVDS_CFG_REG21_TX_ENABLE,
priv->regs + RK3288_LVDS_CFG_REG21);
return 0;
}
int rk_lvds_read_timing(struct udevice *dev, struct display_timing *timing)
{
if (fdtdec_decode_display_timing
(gd->fdt_blob, dev_of_offset(dev), 0, timing)) {
debug("%s: Failed to decode display timing\n", __func__);
return -EINVAL;
}
return 0;
}
static int rk_lvds_ofdata_to_platdata(struct udevice *dev)
{
struct rk_lvds_priv *priv = dev_get_priv(dev);
const void *blob = gd->fdt_blob;
int node = dev_of_offset(dev);
int ret;
priv->regs = (void *)devfdt_get_addr(dev);
priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
ret = fdtdec_get_int(blob, node, "rockchip,output", -1);
if (ret != -1) {
priv->output = ret;
debug("LVDS output : %d\n", ret);
} else {
/* default set it as output rgb */
priv->output = LVDS_OUTPUT_RGB;
}
ret = fdtdec_get_int(blob, node, "rockchip,data-mapping", -1);
if (ret != -1) {
priv->format = ret;
debug("LVDS data-mapping : %d\n", ret);
} else {
/* default set it as format jeida */
priv->format = LVDS_FORMAT_JEIDA;
}
ret = fdtdec_get_int(blob, node, "rockchip,data-width", -1);
if (ret != -1) {
debug("LVDS data-width : %d\n", ret);
if (ret == 24) {
priv->format |= LVDS_24BIT;
} else if (ret == 18) {
priv->format |= LVDS_18BIT;
} else {
debug("rockchip-lvds unsupport data-width[%d]\n", ret);
ret = -EINVAL;
return ret;
}
} else {
priv->format |= LVDS_24BIT;
}
return 0;
}
int rk_lvds_probe(struct udevice *dev)
{
struct rk_lvds_priv *priv = dev_get_priv(dev);
int ret;
ret = uclass_get_device_by_phandle(UCLASS_PANEL, dev, "rockchip,panel",
&priv->panel);
if (ret) {
debug("%s: Cannot find panel for '%s' (ret=%d)\n", __func__,
dev->name, ret);
return ret;
}
return 0;
}
static const struct dm_display_ops lvds_rockchip_ops = {
.read_timing = rk_lvds_read_timing,
.enable = rk_lvds_enable,
};
static const struct udevice_id rockchip_lvds_ids[] = {
{.compatible = "rockchip,rk3288-lvds"},
{}
};
U_BOOT_DRIVER(lvds_rockchip) = {
.name = "lvds_rockchip",
.id = UCLASS_DISPLAY,
.of_match = rockchip_lvds_ids,
.ops = &lvds_rockchip_ops,
.ofdata_to_platdata = rk_lvds_ofdata_to_platdata,
.probe = rk_lvds_probe,
.priv_auto_alloc_size = sizeof(struct rk_lvds_priv),
};
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