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gerrit.devboardsforandroid.linaro.org / platform / external / u-boot / 35ac89dd8fe7e9373d8c4336e7fbe93ae3fd59d7 / . / drivers / video / rockchip / rk_lvds.c
blob: dc10b866c9668f2f3c3a5e78a01f9d2d5d0820e9 [file] [log] [blame]
Jacob Chen35ac89d2016-03-14 11:20:16 +0800[diff] [blame^]1/*
2 * Copyright 2016 Rockchip Inc.
3 *
4 * SPDX-License-Identifier: GPL-2.0+
5 */
6
7#include <common.h>
8#include <clk.h>
9#include <display.h>
10#include <dm.h>
11#include <edid.h>
12#include <panel.h>
13#include <regmap.h>
14#include <syscon.h>
15#include <asm/gpio.h>
16#include <asm/io.h>
17#include <asm/arch/clock.h>
18#include <asm/arch/lvds_rk3288.h>
19#include <asm/arch/grf_rk3288.h>
20#include <dt-bindings/clock/rk3288-cru.h>
21#include <dt-bindings/video/rk3288.h>
22
23DECLARE_GLOBAL_DATA_PTR;
24
25/**
26 * struct rk_lvds_priv - private rockchip lvds display driver info
27 *
28 * @reg: LVDS register address
29 * @grf: GRF register
30 * @panel: Panel device that is used in driver
31 *
32 * @output: Output mode, decided single or double channel,
33 * LVDS or LVTLL
34 * @format: Data format that RGB data will packing as
35 */
36struct rk_lvds_priv {
37 void __iomem *regs;
38 struct rk3288_grf *grf;
39 struct udevice *panel;
40
41 int output;
42 int format;
43};
44
45static inline void lvds_writel(struct rk_lvds_priv *lvds, u32 offset, u32 val)
46{
47 writel(val, lvds->regs + offset);
48
49 writel(val, lvds->regs + offset + 0x100);
50}
51
52int rk_lvds_enable(struct udevice *dev, int panel_bpp,
53 const struct display_timing *edid)
54{
55 struct rk_lvds_priv *priv = dev_get_priv(dev);
56 struct display_plat *uc_plat = dev_get_uclass_platdata(dev);
57 int ret = 0;
58 unsigned int val = 0;
59
60 ret = panel_enable_backlight(priv->panel);
61 if (ret) {
62 debug("%s: backlight error: %d\n", __func__, ret);
63 return ret;
64 }
65
66 /* Select the video source */
67 if (uc_plat->source_id)
68 val = RK3288_LVDS_SOC_CON6_SEL_VOP_LIT |
69 (RK3288_LVDS_SOC_CON6_SEL_VOP_LIT << 16);
70 else
71 val = RK3288_LVDS_SOC_CON6_SEL_VOP_LIT << 16;
72 rk_setreg(&priv->grf->soc_con6, val);
73
74 /* Select data transfer format */
75 val = priv->format;
76 if (priv->output == LVDS_OUTPUT_DUAL)
77 val |= LVDS_DUAL | LVDS_CH0_EN | LVDS_CH1_EN;
78 else if (priv->output == LVDS_OUTPUT_SINGLE)
79 val |= LVDS_CH0_EN;
80 else if (priv->output == LVDS_OUTPUT_RGB)
81 val |= LVDS_TTL_EN | LVDS_CH0_EN | LVDS_CH1_EN;
82 val |= (0xffff << 16);
83 rk_setreg(&priv->grf->soc_con7, val);
84
85 /* Enable LVDS PHY */
86 if (priv->output == LVDS_OUTPUT_RGB) {
87 lvds_writel(priv, RK3288_LVDS_CH0_REG0,
88 RK3288_LVDS_CH0_REG0_TTL_EN |
89 RK3288_LVDS_CH0_REG0_LANECK_EN |
90 RK3288_LVDS_CH0_REG0_LANE4_EN |
91 RK3288_LVDS_CH0_REG0_LANE3_EN |
92 RK3288_LVDS_CH0_REG0_LANE2_EN |
93 RK3288_LVDS_CH0_REG0_LANE1_EN |
94 RK3288_LVDS_CH0_REG0_LANE0_EN);
95 lvds_writel(priv, RK3288_LVDS_CH0_REG2,
96 RK3288_LVDS_PLL_FBDIV_REG2(0x46));
97
98 lvds_writel(priv, RK3288_LVDS_CH0_REG3,
99 RK3288_LVDS_PLL_FBDIV_REG3(0x46));
100 lvds_writel(priv, RK3288_LVDS_CH0_REG4,
101 RK3288_LVDS_CH0_REG4_LANECK_TTL_MODE |
102 RK3288_LVDS_CH0_REG4_LANE4_TTL_MODE |
103 RK3288_LVDS_CH0_REG4_LANE3_TTL_MODE |
104 RK3288_LVDS_CH0_REG4_LANE2_TTL_MODE |
105 RK3288_LVDS_CH0_REG4_LANE1_TTL_MODE |
106 RK3288_LVDS_CH0_REG4_LANE0_TTL_MODE);
107 lvds_writel(priv, RK3288_LVDS_CH0_REG5,
108 RK3288_LVDS_CH0_REG5_LANECK_TTL_DATA |
109 RK3288_LVDS_CH0_REG5_LANE4_TTL_DATA |
110 RK3288_LVDS_CH0_REG5_LANE3_TTL_DATA |
111 RK3288_LVDS_CH0_REG5_LANE2_TTL_DATA |
112 RK3288_LVDS_CH0_REG5_LANE1_TTL_DATA |
113 RK3288_LVDS_CH0_REG5_LANE0_TTL_DATA);
114 lvds_writel(priv, RK3288_LVDS_CH0_REGD,
115 RK3288_LVDS_PLL_PREDIV_REGD(0x0a));
116 lvds_writel(priv, RK3288_LVDS_CH0_REG20,
117 RK3288_LVDS_CH0_REG20_LSB);
118 } else {
119 lvds_writel(priv, RK3288_LVDS_CH0_REG0,
120 RK3288_LVDS_CH0_REG0_LVDS_EN |
121 RK3288_LVDS_CH0_REG0_LANECK_EN |
122 RK3288_LVDS_CH0_REG0_LANE4_EN |
123 RK3288_LVDS_CH0_REG0_LANE3_EN |
124 RK3288_LVDS_CH0_REG0_LANE2_EN |
125 RK3288_LVDS_CH0_REG0_LANE1_EN |
126 RK3288_LVDS_CH0_REG0_LANE0_EN);
127 lvds_writel(priv, RK3288_LVDS_CH0_REG1,
128 RK3288_LVDS_CH0_REG1_LANECK_BIAS |
129 RK3288_LVDS_CH0_REG1_LANE4_BIAS |
130 RK3288_LVDS_CH0_REG1_LANE3_BIAS |
131 RK3288_LVDS_CH0_REG1_LANE2_BIAS |
132 RK3288_LVDS_CH0_REG1_LANE1_BIAS |
133 RK3288_LVDS_CH0_REG1_LANE0_BIAS);
134 lvds_writel(priv, RK3288_LVDS_CH0_REG2,
135 RK3288_LVDS_CH0_REG2_RESERVE_ON |
136 RK3288_LVDS_CH0_REG2_LANECK_LVDS_MODE |
137 RK3288_LVDS_CH0_REG2_LANE4_LVDS_MODE |
138 RK3288_LVDS_CH0_REG2_LANE3_LVDS_MODE |
139 RK3288_LVDS_CH0_REG2_LANE2_LVDS_MODE |
140 RK3288_LVDS_CH0_REG2_LANE1_LVDS_MODE |
141 RK3288_LVDS_CH0_REG2_LANE0_LVDS_MODE |
142 RK3288_LVDS_PLL_FBDIV_REG2(0x46));
143 lvds_writel(priv, RK3288_LVDS_CH0_REG3,
144 RK3288_LVDS_PLL_FBDIV_REG3(0x46));
145 lvds_writel(priv, RK3288_LVDS_CH0_REG4, 0x00);
146 lvds_writel(priv, RK3288_LVDS_CH0_REG5, 0x00);
147 lvds_writel(priv, RK3288_LVDS_CH0_REGD,
148 RK3288_LVDS_PLL_PREDIV_REGD(0x0a));
149 lvds_writel(priv, RK3288_LVDS_CH0_REG20,
150 RK3288_LVDS_CH0_REG20_LSB);
151 }
152
153 /* Power on */
154 writel(RK3288_LVDS_CFG_REGC_PLL_ENABLE,
155 priv->regs + RK3288_LVDS_CFG_REGC);
156
157 writel(RK3288_LVDS_CFG_REG21_TX_ENABLE,
158 priv->regs + RK3288_LVDS_CFG_REG21);
159
160 return 0;
161}
162
163int rk_lvds_read_timing(struct udevice *dev, struct display_timing *timing)
164{
165 if (fdtdec_decode_display_timing
166 (gd->fdt_blob, dev->of_offset, 0, timing)) {
167 debug("%s: Failed to decode display timing\n", __func__);
168 return -EINVAL;
169 }
170
171 return 0;
172}
173
174static int rk_lvds_ofdata_to_platdata(struct udevice *dev)
175{
176 struct rk_lvds_priv *priv = dev_get_priv(dev);
177 const void *blob = gd->fdt_blob;
178 int node = dev->of_offset;
179 int ret;
180 priv->regs = (void *)dev_get_addr(dev);
181 priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
182
183 ret = fdtdec_get_int(blob, node, "rockchip,output", -1);
184 if (ret != -1) {
185 priv->output = ret;
186 debug("LVDS output : %d\n", ret);
187 } else {
188 /* default set it as output rgb */
189 priv->output = LVDS_OUTPUT_RGB;
190 }
191
192 ret = fdtdec_get_int(blob, node, "rockchip,data-mapping", -1);
193 if (ret != -1) {
194 priv->format = ret;
195 debug("LVDS data-mapping : %d\n", ret);
196 } else {
197 /* default set it as format jeida */
198 priv->format = LVDS_FORMAT_JEIDA;
199 }
200
201 ret = fdtdec_get_int(blob, node, "rockchip,data-width", -1);
202 if (ret != -1) {
203 debug("LVDS data-width : %d\n", ret);
204 if (ret == 24) {
205 priv->format |= LVDS_24BIT;
206 } else if (ret == 18) {
207 priv->format |= LVDS_18BIT;
208 } else {
209 debug("rockchip-lvds unsupport data-width[%d]\n", ret);
210 ret = -EINVAL;
211 return ret;
212 }
213 } else {
214 priv->format |= LVDS_24BIT;
215 }
216
217 return 0;
218}
219
220int rk_lvds_probe(struct udevice *dev)
221{
222 struct rk_lvds_priv *priv = dev_get_priv(dev);
223 int ret;
224
225 ret = uclass_get_device_by_phandle(UCLASS_PANEL, dev, "rockchip,panel",
226 &priv->panel);
227 if (ret) {
228 debug("%s: Cannot find panel for '%s' (ret=%d)\n", __func__,
229 dev->name, ret);
230 return ret;
231 }
232
233 return 0;
234}
235
236static const struct dm_display_ops lvds_rockchip_ops = {
237 .read_timing = rk_lvds_read_timing,
238 .enable = rk_lvds_enable,
239};
240
241static const struct udevice_id rockchip_lvds_ids[] = {
242 {.compatible = "rockchip,rk3288-lvds"},
243 {}
244};
245
246U_BOOT_DRIVER(lvds_rockchip) = {
247 .name = "lvds_rockchip",
248 .id = UCLASS_DISPLAY,
249 .of_match = rockchip_lvds_ids,
250 .ops = &lvds_rockchip_ops,
251 .ofdata_to_platdata = rk_lvds_ofdata_to_platdata,
252 .probe = rk_lvds_probe,
253 .priv_auto_alloc_size = sizeof(struct rk_lvds_priv),
254};