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https://github.com/AsahiLinux/u-boot
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251 lines
7 KiB
C
251 lines
7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2016 Rockchip Inc.
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*/
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#include <common.h>
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#include <display.h>
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#include <dm.h>
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#include <edid.h>
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#include <log.h>
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#include <panel.h>
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#include <regmap.h>
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#include <syscon.h>
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#include <asm/gpio.h>
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#include <asm/io.h>
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#include <asm/arch-rockchip/clock.h>
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#include <asm/arch-rockchip/grf_rk3288.h>
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#include <asm/arch-rockchip/hardware.h>
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#include <asm/arch-rockchip/lvds_rk3288.h>
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#include <dt-bindings/clock/rk3288-cru.h>
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#include <dt-bindings/video/rk3288.h>
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DECLARE_GLOBAL_DATA_PTR;
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/**
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* struct rk_lvds_priv - private rockchip lvds display driver info
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*
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* @reg: LVDS register address
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* @grf: GRF register
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* @panel: Panel device that is used in driver
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*
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* @output: Output mode, decided single or double channel,
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* LVDS or LVTLL
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* @format: Data format that RGB data will packing as
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*/
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struct rk_lvds_priv {
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void __iomem *regs;
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struct rk3288_grf *grf;
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struct udevice *panel;
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int output;
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int format;
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};
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static inline void lvds_writel(struct rk_lvds_priv *lvds, u32 offset, u32 val)
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{
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writel(val, lvds->regs + offset);
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writel(val, lvds->regs + offset + 0x100);
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}
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int rk_lvds_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_lvds_priv *priv = dev_get_priv(dev);
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struct display_plat *uc_plat = dev_get_uclass_platdata(dev);
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int ret = 0;
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unsigned int val = 0;
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ret = panel_enable_backlight(priv->panel);
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if (ret) {
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debug("%s: backlight error: %d\n", __func__, ret);
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return ret;
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}
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/* Select the video source */
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if (uc_plat->source_id)
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val = RK3288_LVDS_SOC_CON6_SEL_VOP_LIT |
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(RK3288_LVDS_SOC_CON6_SEL_VOP_LIT << 16);
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else
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val = RK3288_LVDS_SOC_CON6_SEL_VOP_LIT << 16;
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rk_setreg(&priv->grf->soc_con6, val);
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/* Select data transfer format */
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val = priv->format;
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if (priv->output == LVDS_OUTPUT_DUAL)
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val |= LVDS_DUAL | LVDS_CH0_EN | LVDS_CH1_EN;
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else if (priv->output == LVDS_OUTPUT_SINGLE)
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val |= LVDS_CH0_EN;
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else if (priv->output == LVDS_OUTPUT_RGB)
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val |= LVDS_TTL_EN | LVDS_CH0_EN | LVDS_CH1_EN;
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val |= (0xffff << 16);
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rk_setreg(&priv->grf->soc_con7, val);
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/* Enable LVDS PHY */
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if (priv->output == LVDS_OUTPUT_RGB) {
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lvds_writel(priv, RK3288_LVDS_CH0_REG0,
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RK3288_LVDS_CH0_REG0_TTL_EN |
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RK3288_LVDS_CH0_REG0_LANECK_EN |
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RK3288_LVDS_CH0_REG0_LANE4_EN |
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RK3288_LVDS_CH0_REG0_LANE3_EN |
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RK3288_LVDS_CH0_REG0_LANE2_EN |
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RK3288_LVDS_CH0_REG0_LANE1_EN |
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RK3288_LVDS_CH0_REG0_LANE0_EN);
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lvds_writel(priv, RK3288_LVDS_CH0_REG2,
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RK3288_LVDS_PLL_FBDIV_REG2(0x46));
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lvds_writel(priv, RK3288_LVDS_CH0_REG3,
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RK3288_LVDS_PLL_FBDIV_REG3(0x46));
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lvds_writel(priv, RK3288_LVDS_CH0_REG4,
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RK3288_LVDS_CH0_REG4_LANECK_TTL_MODE |
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RK3288_LVDS_CH0_REG4_LANE4_TTL_MODE |
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RK3288_LVDS_CH0_REG4_LANE3_TTL_MODE |
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RK3288_LVDS_CH0_REG4_LANE2_TTL_MODE |
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RK3288_LVDS_CH0_REG4_LANE1_TTL_MODE |
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RK3288_LVDS_CH0_REG4_LANE0_TTL_MODE);
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lvds_writel(priv, RK3288_LVDS_CH0_REG5,
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RK3288_LVDS_CH0_REG5_LANECK_TTL_DATA |
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RK3288_LVDS_CH0_REG5_LANE4_TTL_DATA |
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RK3288_LVDS_CH0_REG5_LANE3_TTL_DATA |
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RK3288_LVDS_CH0_REG5_LANE2_TTL_DATA |
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RK3288_LVDS_CH0_REG5_LANE1_TTL_DATA |
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RK3288_LVDS_CH0_REG5_LANE0_TTL_DATA);
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lvds_writel(priv, RK3288_LVDS_CH0_REGD,
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RK3288_LVDS_PLL_PREDIV_REGD(0x0a));
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lvds_writel(priv, RK3288_LVDS_CH0_REG20,
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RK3288_LVDS_CH0_REG20_LSB);
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} else {
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lvds_writel(priv, RK3288_LVDS_CH0_REG0,
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RK3288_LVDS_CH0_REG0_LVDS_EN |
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RK3288_LVDS_CH0_REG0_LANECK_EN |
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RK3288_LVDS_CH0_REG0_LANE4_EN |
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RK3288_LVDS_CH0_REG0_LANE3_EN |
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RK3288_LVDS_CH0_REG0_LANE2_EN |
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RK3288_LVDS_CH0_REG0_LANE1_EN |
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RK3288_LVDS_CH0_REG0_LANE0_EN);
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lvds_writel(priv, RK3288_LVDS_CH0_REG1,
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RK3288_LVDS_CH0_REG1_LANECK_BIAS |
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RK3288_LVDS_CH0_REG1_LANE4_BIAS |
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RK3288_LVDS_CH0_REG1_LANE3_BIAS |
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RK3288_LVDS_CH0_REG1_LANE2_BIAS |
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RK3288_LVDS_CH0_REG1_LANE1_BIAS |
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RK3288_LVDS_CH0_REG1_LANE0_BIAS);
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lvds_writel(priv, RK3288_LVDS_CH0_REG2,
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RK3288_LVDS_CH0_REG2_RESERVE_ON |
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RK3288_LVDS_CH0_REG2_LANECK_LVDS_MODE |
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RK3288_LVDS_CH0_REG2_LANE4_LVDS_MODE |
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RK3288_LVDS_CH0_REG2_LANE3_LVDS_MODE |
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RK3288_LVDS_CH0_REG2_LANE2_LVDS_MODE |
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RK3288_LVDS_CH0_REG2_LANE1_LVDS_MODE |
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RK3288_LVDS_CH0_REG2_LANE0_LVDS_MODE |
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RK3288_LVDS_PLL_FBDIV_REG2(0x46));
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lvds_writel(priv, RK3288_LVDS_CH0_REG3,
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RK3288_LVDS_PLL_FBDIV_REG3(0x46));
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lvds_writel(priv, RK3288_LVDS_CH0_REG4, 0x00);
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lvds_writel(priv, RK3288_LVDS_CH0_REG5, 0x00);
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lvds_writel(priv, RK3288_LVDS_CH0_REGD,
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RK3288_LVDS_PLL_PREDIV_REGD(0x0a));
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lvds_writel(priv, RK3288_LVDS_CH0_REG20,
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RK3288_LVDS_CH0_REG20_LSB);
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}
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/* Power on */
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writel(RK3288_LVDS_CFG_REGC_PLL_ENABLE,
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priv->regs + RK3288_LVDS_CFG_REGC);
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writel(RK3288_LVDS_CFG_REG21_TX_ENABLE,
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priv->regs + RK3288_LVDS_CFG_REG21);
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return 0;
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}
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int rk_lvds_read_timing(struct udevice *dev, struct display_timing *timing)
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{
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if (ofnode_decode_display_timing(dev_ofnode(dev), 0, timing)) {
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debug("%s: Failed to decode display timing\n", __func__);
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return -EINVAL;
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}
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return 0;
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}
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static int rk_lvds_ofdata_to_platdata(struct udevice *dev)
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{
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struct rk_lvds_priv *priv = dev_get_priv(dev);
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int ret;
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priv->regs = dev_read_addr_ptr(dev);
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priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
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ret = dev_read_s32_default(dev, "rockchip,output", -1);
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if (ret != -1) {
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priv->output = ret;
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debug("LVDS output : %d\n", ret);
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} else {
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/* default set it as output rgb */
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priv->output = LVDS_OUTPUT_RGB;
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}
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ret = dev_read_s32_default(dev, "rockchip,data-mapping", -1);
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if (ret != -1) {
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priv->format = ret;
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debug("LVDS data-mapping : %d\n", ret);
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} else {
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/* default set it as format jeida */
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priv->format = LVDS_FORMAT_JEIDA;
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}
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ret = dev_read_s32_default(dev, "rockchip,data-width", -1);
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if (ret != -1) {
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debug("LVDS data-width : %d\n", ret);
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if (ret == 24) {
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priv->format |= LVDS_24BIT;
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} else if (ret == 18) {
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priv->format |= LVDS_18BIT;
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} else {
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debug("rockchip-lvds unsupport data-width[%d]\n", ret);
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ret = -EINVAL;
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return ret;
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}
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} else {
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priv->format |= LVDS_24BIT;
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}
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return 0;
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}
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int rk_lvds_probe(struct udevice *dev)
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{
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struct rk_lvds_priv *priv = dev_get_priv(dev);
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int ret;
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ret = uclass_get_device_by_phandle(UCLASS_PANEL, dev, "rockchip,panel",
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&priv->panel);
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if (ret) {
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debug("%s: Cannot find panel for '%s' (ret=%d)\n", __func__,
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dev->name, ret);
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return ret;
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}
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return 0;
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}
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static const struct dm_display_ops lvds_rockchip_ops = {
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.read_timing = rk_lvds_read_timing,
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.enable = rk_lvds_enable,
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};
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static const struct udevice_id rockchip_lvds_ids[] = {
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{.compatible = "rockchip,rk3288-lvds"},
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{}
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};
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U_BOOT_DRIVER(lvds_rockchip) = {
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.name = "lvds_rockchip",
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.id = UCLASS_DISPLAY,
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.of_match = rockchip_lvds_ids,
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.ops = &lvds_rockchip_ops,
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.ofdata_to_platdata = rk_lvds_ofdata_to_platdata,
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.probe = rk_lvds_probe,
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.priv_auto_alloc_size = sizeof(struct rk_lvds_priv),
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};
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