1 /* 2 * Copyright (c) 2017, Fuzhou Rockchip Electronics Co., Ltd 3 * Author: Eric Gao <eric.gao@rock-chips.com> 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #include <common.h> 9 #include <clk.h> 10 #include <display.h> 11 #include <dm.h> 12 #include <fdtdec.h> 13 #include <panel.h> 14 #include <regmap.h> 15 #include "rk_mipi.h" 16 #include <syscon.h> 17 #include <asm/gpio.h> 18 #include <asm/hardware.h> 19 #include <asm/io.h> 20 #include <dm/uclass-internal.h> 21 #include <linux/kernel.h> 22 #include <asm/arch/clock.h> 23 #include <asm/arch/cru_rk3399.h> 24 #include <asm/arch/grf_rk3399.h> 25 #include <asm/arch/rockchip_mipi_dsi.h> 26 27 DECLARE_GLOBAL_DATA_PTR; 28 29 /* Select mipi dsi source, big or little vop */ 30 static int rk_mipi_dsi_source_select(struct udevice *dev) 31 { 32 struct rk_mipi_priv *priv = dev_get_priv(dev); 33 struct rk3399_grf_regs *grf = priv->grf; 34 struct display_plat *disp_uc_plat = dev_get_uclass_platdata(dev); 35 36 /* Select the video source */ 37 switch (disp_uc_plat->source_id) { 38 case VOP_B: 39 rk_clrsetreg(&grf->soc_con20, GRF_DSI0_VOP_SEL_MASK, 40 GRF_DSI0_VOP_SEL_B << GRF_DSI0_VOP_SEL_SHIFT); 41 break; 42 case VOP_L: 43 rk_clrsetreg(&grf->soc_con20, GRF_DSI0_VOP_SEL_MASK, 44 GRF_DSI0_VOP_SEL_L << GRF_DSI0_VOP_SEL_SHIFT); 45 break; 46 default: 47 debug("%s: Invalid VOP id\n", __func__); 48 return -EINVAL; 49 } 50 51 return 0; 52 } 53 54 /* Setup mipi dphy working mode */ 55 static void rk_mipi_dphy_mode_set(struct udevice *dev) 56 { 57 struct rk_mipi_priv *priv = dev_get_priv(dev); 58 struct rk3399_grf_regs *grf = priv->grf; 59 int val; 60 61 /* Set Controller as TX mode */ 62 val = GRF_DPHY_TX0_RXMODE_DIS << GRF_DPHY_TX0_RXMODE_SHIFT; 63 rk_clrsetreg(&grf->soc_con22, GRF_DPHY_TX0_RXMODE_MASK, val); 64 65 /* Exit tx stop mode */ 66 val |= GRF_DPHY_TX0_TXSTOPMODE_DIS << GRF_DPHY_TX0_TXSTOPMODE_SHIFT; 67 rk_clrsetreg(&grf->soc_con22, GRF_DPHY_TX0_TXSTOPMODE_MASK, val); 68 69 /* Disable turnequest */ 70 val |= GRF_DPHY_TX0_TURNREQUEST_DIS << GRF_DPHY_TX0_TURNREQUEST_SHIFT; 71 rk_clrsetreg(&grf->soc_con22, GRF_DPHY_TX0_TURNREQUEST_MASK, val); 72 } 73 74 /* 75 * This function is called by rk_display_init() using rk_mipi_dsi_enable() and 76 * rk_mipi_phy_enable() to initialize mipi controller and dphy. If success, 77 * enable backlight. 78 */ 79 static int rk_display_enable(struct udevice *dev, int panel_bpp, 80 const struct display_timing *timing) 81 { 82 int ret; 83 struct rk_mipi_priv *priv = dev_get_priv(dev); 84 85 /* Fill the mipi controller parameter */ 86 priv->ref_clk = 24 * MHz; 87 priv->sys_clk = priv->ref_clk; 88 priv->pix_clk = timing->pixelclock.typ; 89 priv->phy_clk = priv->pix_clk * 6; 90 priv->txbyte_clk = priv->phy_clk / 8; 91 priv->txesc_clk = 20 * MHz; 92 93 /* Select vop port, big or little */ 94 rk_mipi_dsi_source_select(dev); 95 96 /* Set mipi dphy work mode */ 97 rk_mipi_dphy_mode_set(dev); 98 99 /* Config and enable mipi dsi according to timing */ 100 ret = rk_mipi_dsi_enable(dev, timing); 101 if (ret) { 102 debug("%s: rk_mipi_dsi_enable() failed (err=%d)\n", 103 __func__, ret); 104 return ret; 105 } 106 107 /* Config and enable mipi phy */ 108 ret = rk_mipi_phy_enable(dev); 109 if (ret) { 110 debug("%s: rk_mipi_phy_enable() failed (err=%d)\n", 111 __func__, ret); 112 return ret; 113 } 114 115 /* Enable backlight */ 116 ret = panel_enable_backlight(priv->panel); 117 if (ret) { 118 debug("%s: panel_enable_backlight() failed (err=%d)\n", 119 __func__, ret); 120 return ret; 121 } 122 123 return 0; 124 } 125 126 static int rk_mipi_ofdata_to_platdata(struct udevice *dev) 127 { 128 struct rk_mipi_priv *priv = dev_get_priv(dev); 129 130 priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF); 131 if (IS_ERR_OR_NULL(priv->grf)) { 132 debug("%s: Get syscon grf failed (ret=%p)\n", 133 __func__, priv->grf); 134 return -ENXIO; 135 } 136 priv->regs = dev_read_addr(dev); 137 if (priv->regs == FDT_ADDR_T_NONE) { 138 debug("%s: Get MIPI dsi address failed\n", __func__); 139 return -ENXIO; 140 } 141 142 return 0; 143 } 144 145 /* 146 * Probe function: check panel existence and readingit's timing. Then config 147 * mipi dsi controller and enable it according to the timing parameter. 148 */ 149 static int rk_mipi_probe(struct udevice *dev) 150 { 151 int ret; 152 struct rk_mipi_priv *priv = dev_get_priv(dev); 153 154 ret = uclass_get_device_by_phandle(UCLASS_PANEL, dev, "rockchip,panel", 155 &priv->panel); 156 if (ret) { 157 debug("%s: Can not find panel (err=%d)\n", __func__, ret); 158 return ret; 159 } 160 161 return 0; 162 } 163 164 static const struct dm_display_ops rk_mipi_dsi_ops = { 165 .read_timing = rk_mipi_read_timing, 166 .enable = rk_display_enable, 167 }; 168 169 static const struct udevice_id rk_mipi_dsi_ids[] = { 170 { .compatible = "rockchip,rk3399_mipi_dsi" }, 171 { } 172 }; 173 174 U_BOOT_DRIVER(rk_mipi_dsi) = { 175 .name = "rk_mipi_dsi", 176 .id = UCLASS_DISPLAY, 177 .of_match = rk_mipi_dsi_ids, 178 .ofdata_to_platdata = rk_mipi_ofdata_to_platdata, 179 .probe = rk_mipi_probe, 180 .ops = &rk_mipi_dsi_ops, 181 .priv_auto_alloc_size = sizeof(struct rk_mipi_priv), 182 }; 183