1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (c) 2017 Theobroma Systems Design und Consulting GmbH
4 * Copyright (c) 2015 Google, Inc
5 * Copyright 2014 Rockchip Inc.
6 */
7
8 #include <common.h>
9 #include <display.h>
10 #include <dm.h>
11 #include <regmap.h>
12 #include <syscon.h>
13 #include <video.h>
14 #include <asm/global_data.h>
15 #include <asm/io.h>
16 #include <asm/arch-rockchip/clock.h>
17 #include <asm/arch-rockchip/grf_rk3288.h>
18 #include <asm/arch-rockchip/hardware.h>
19 #include <linux/delay.h>
20 #include "rk_vop.h"
21
22 DECLARE_GLOBAL_DATA_PTR;
23
rk3288_set_pin_polarity(struct udevice * dev,enum vop_modes mode,u32 polarity)24 static void rk3288_set_pin_polarity(struct udevice *dev,
25 enum vop_modes mode, u32 polarity)
26 {
27 struct rk_vop_priv *priv = dev_get_priv(dev);
28 struct rk3288_vop *regs = priv->regs;
29
30 /* The RK3328 VOP (v3.1) has its polarity configuration in ctrl0 */
31 clrsetbits_le32(®s->dsp_ctrl0,
32 M_DSP_DCLK_POL | M_DSP_DEN_POL |
33 M_DSP_VSYNC_POL | M_DSP_HSYNC_POL,
34 V_DSP_PIN_POL(polarity));
35 }
36
rk3288_set_io_vsel(struct udevice * dev)37 static void rk3288_set_io_vsel(struct udevice *dev)
38 {
39 struct rk3288_grf *grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
40
41 /* lcdc(vop) iodomain select 1.8V */
42 rk_setreg(&grf->io_vsel, 1 << 0);
43 }
44
45 /*
46 * Try some common regulators. We should really get these from the
47 * device tree somehow.
48 */
49 static const char * const rk3288_regulator_names[] = {
50 "vcc18_lcd",
51 "VCC18_LCD",
52 "vdd10_lcd_pwren_h",
53 "vdd10_lcd",
54 "VDD10_LCD",
55 "vcc33_lcd"
56 };
57
rk3288_vop_probe(struct udevice * dev)58 static int rk3288_vop_probe(struct udevice *dev)
59 {
60 /* Before relocation we don't need to do anything */
61 if (!(gd->flags & GD_FLG_RELOC))
62 return 0;
63
64 /* Set the LCDC(vop) iodomain to 1.8V */
65 rk3288_set_io_vsel(dev);
66
67 /* Probe regulators required for the RK3288 VOP */
68 rk_vop_probe_regulators(dev, rk3288_regulator_names,
69 ARRAY_SIZE(rk3288_regulator_names));
70
71 return rk_vop_probe(dev);
72 }
73
rk_vop_remove(struct udevice * dev)74 static int rk_vop_remove(struct udevice *dev)
75 {
76 struct rk_vop_priv *priv = dev_get_priv(dev);
77 struct rk3288_vop *regs = priv->regs;
78
79 setbits_le32(®s->sys_ctrl, V_STANDBY_EN(1));
80
81 /* wait frame complete (60Hz) to enter standby */
82 mdelay(17);
83
84 return 0;
85 }
86
87 struct rkvop_driverdata rk3288_driverdata = {
88 .features = VOP_FEATURE_OUTPUT_10BIT,
89 .set_pin_polarity = rk3288_set_pin_polarity,
90 };
91
92 static const struct udevice_id rk3288_vop_ids[] = {
93 { .compatible = "rockchip,rk3288-vop",
94 .data = (ulong)&rk3288_driverdata },
95 { }
96 };
97
98 static const struct video_ops rk3288_vop_ops = {
99 };
100
101 U_BOOT_DRIVER(rockchip_rk3288_vop) = {
102 .name = "rockchip_rk3288_vop",
103 .id = UCLASS_VIDEO,
104 .of_match = rk3288_vop_ids,
105 .ops = &rk3288_vop_ops,
106 .bind = rk_vop_bind,
107 .probe = rk3288_vop_probe,
108 .remove = rk_vop_remove,
109 .priv_auto = sizeof(struct rk_vop_priv),
110 };
111