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 
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(&regs->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 
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 
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 
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(&regs->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