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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/lvds_rk3288.h>
- #include <asm/arch-rockchip/grf_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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