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