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Merge tag 'u-boot-imx-master-20250127' of https://gitlab.denx.de/u-boot/custodians...
[J-u-boot.git] / drivers / video / rockchip / rk3288_mipi.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright (c) 2017, Fuzhou Rockchip Electronics Co., Ltd
4  * Author: Eric Gao <[email protected]>
5  */
6
7 #include <clk.h>
8 #include <display.h>
9 #include <dm.h>
10 #include <log.h>
11 #include <panel.h>
12 #include <regmap.h>
13 #include "rk_mipi.h"
14 #include <syscon.h>
15 #include <asm/gpio.h>
16 #include <dm/uclass-internal.h>
17 #include <linux/err.h>
18 #include <linux/kernel.h>
19 #include <asm/arch-rockchip/clock.h>
20 #include <asm/arch-rockchip/cru.h>
21 #include <asm/arch-rockchip/grf_rk3288.h>
22 #include <asm/arch-rockchip/hardware.h>
23 #include <asm/arch-rockchip/rockchip_mipi_dsi.h>
24
25 #define MHz 1000000
26
27 /* Select mipi dsi source, big or little vop */
28 static int rk_mipi_dsi_source_select(struct udevice *dev)
29 {
30         struct rk_mipi_priv *priv = dev_get_priv(dev);
31         struct rk3288_grf *grf = priv->grf;
32         struct display_plat *disp_uc_plat = dev_get_uclass_plat(dev);
33
34         /* Select the video source */
35         switch (disp_uc_plat->source_id) {
36         case VOP_B:
37                 rk_clrsetreg(&grf->soc_con6, RK3288_DSI0_LCDC_SEL_MASK,
38                              RK3288_DSI0_LCDC_SEL_BIG
39                              << RK3288_DSI0_LCDC_SEL_SHIFT);
40                 break;
41         case VOP_L:
42                 rk_clrsetreg(&grf->soc_con6, RK3288_DSI0_LCDC_SEL_MASK,
43                              RK3288_DSI0_LCDC_SEL_LIT
44                              << RK3288_DSI0_LCDC_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 rk3288_grf *grf = priv->grf;
59         int val;
60
61         /* Set Controller as TX mode */
62         val = RK3288_DPHY_TX0_RXMODE_DIS << RK3288_DPHY_TX0_RXMODE_SHIFT;
63         rk_clrsetreg(&grf->soc_con8, RK3288_DPHY_TX0_RXMODE_MASK, val);
64
65         /* Exit tx stop mode */
66         val |= RK3288_DPHY_TX0_TXSTOPMODE_EN
67                         << RK3288_DPHY_TX0_TXSTOPMODE_SHIFT;
68         rk_clrsetreg(&grf->soc_con8,
69                      RK3288_DPHY_TX0_TXSTOPMODE_MASK, val);
70
71         /* Disable turnequest */
72         val |= RK3288_DPHY_TX0_TURNREQUEST_EN
73                 << RK3288_DPHY_TX0_TURNREQUEST_SHIFT;
74         rk_clrsetreg(&grf->soc_con8,
75                      RK3288_DPHY_TX0_TURNREQUEST_MASK, val);
76 }
77
78 /*
79  * This function is called by rk_display_init() using rk_mipi_dsi_enable() and
80  * rk_mipi_phy_enable() to initialize mipi controller and dphy. If success,
81  * enable backlight.
82  */
83 static int rk_mipi_enable(struct udevice *dev, int panel_bpp,
84                           const struct display_timing *timing)
85 {
86         int ret;
87         struct rk_mipi_priv *priv = dev_get_priv(dev);
88
89         /* Fill the mipi controller parameter */
90         priv->ref_clk = 24 * MHz;
91         priv->sys_clk = priv->ref_clk;
92         priv->pix_clk = timing->pixelclock.typ;
93         priv->phy_clk = priv->pix_clk * 6;
94         priv->txbyte_clk = priv->phy_clk / 8;
95         priv->txesc_clk = 20 * MHz;
96
97         /* Select vop port, big or little */
98         rk_mipi_dsi_source_select(dev);
99
100         /* Set mipi dphy work mode */
101         rk_mipi_dphy_mode_set(dev);
102
103         /* Config  and enable mipi dsi according to timing */
104         ret = rk_mipi_dsi_enable(dev, timing);
105         if (ret) {
106                 debug("%s: rk_mipi_dsi_enable() failed (err=%d)\n",
107                       __func__, ret);
108                 return ret;
109         }
110
111         /* Config and enable mipi phy */
112         ret = rk_mipi_phy_enable(dev);
113         if (ret) {
114                 debug("%s: rk_mipi_phy_enable() failed (err=%d)\n",
115                       __func__, ret);
116                 return ret;
117         }
118
119         /* Enable backlight */
120         ret = panel_enable_backlight(priv->panel);
121         if (ret) {
122                 debug("%s: panel_enable_backlight() failed (err=%d)\n",
123                       __func__, ret);
124                 return ret;
125         }
126
127         return 0;
128 }
129
130 static int rk_mipi_of_to_plat(struct udevice *dev)
131 {
132         struct rk_mipi_priv *priv = dev_get_priv(dev);
133
134         priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
135         if (IS_ERR_OR_NULL(priv->grf)) {
136                 debug("%s: Get syscon grf failed (ret=%p)\n",
137                       __func__, priv->grf);
138                 return  -ENXIO;
139         }
140         priv->regs = dev_read_addr(dev);
141         if (priv->regs == FDT_ADDR_T_NONE) {
142                 debug("%s: Get MIPI dsi address failed (ret=%lu)\n", __func__,
143                       priv->regs);
144                 return  -ENXIO;
145         }
146
147         return 0;
148 }
149
150 /*
151  * Probe function: check panel existence and readingit's timing. Then config
152  * mipi dsi controller and enable it according to the timing parameter.
153  */
154 static int rk_mipi_probe(struct udevice *dev)
155 {
156         int ret;
157         struct rk_mipi_priv *priv = dev_get_priv(dev);
158
159         ret = uclass_get_device_by_phandle(UCLASS_PANEL, dev, "rockchip,panel",
160                                            &priv->panel);
161         if (ret) {
162                 debug("%s: Can not find panel (err=%d)\n", __func__, ret);
163                 return ret;
164         }
165
166         return 0;
167 }
168
169 static const struct dm_display_ops rk_mipi_dsi_ops = {
170         .read_timing = rk_mipi_read_timing,
171         .enable = rk_mipi_enable,
172 };
173
174 static const struct udevice_id rk_mipi_dsi_ids[] = {
175         { .compatible = "rockchip,rk3288-mipi-dsi" },
176         { .compatible = "rockchip,rk3288_mipi_dsi" },
177         { }
178 };
179
180 U_BOOT_DRIVER(rk_mipi_dsi) = {
181         .name   = "rk_mipi_dsi",
182         .id     = UCLASS_DISPLAY,
183         .of_match = rk_mipi_dsi_ids,
184         .of_to_plat = rk_mipi_of_to_plat,
185         .probe  = rk_mipi_probe,
186         .ops    = &rk_mipi_dsi_ops,
187         .priv_auto        = sizeof(struct rk_mipi_priv),
188 };
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