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 <video.h>
13 #include <asm/hardware.h>
14 #include <asm/io.h>
15 #include "rk_vop.h"
16 
17 DECLARE_GLOBAL_DATA_PTR;
18 
19 static void rk3399_set_pin_polarity(struct udevice *dev,
20 				    enum vop_modes mode, u32 polarity)
21 {
22 	struct rk_vop_priv *priv = dev_get_priv(dev);
23 	struct rk3288_vop *regs = priv->regs;
24 
25 	/*
26 	 * The RK3399 VOPs (v3.5 and v3.6) require a per-mode setting of
27 	 * the polarity configuration (in ctrl1).
28 	 */
29 	switch (mode) {
30 	case VOP_MODE_HDMI:
31 		clrsetbits_le32(&regs->dsp_ctrl1,
32 				M_RK3399_DSP_HDMI_POL,
33 				V_RK3399_DSP_HDMI_POL(polarity));
34 		break;
35 
36 	case VOP_MODE_EDP:
37 		clrsetbits_le32(&regs->dsp_ctrl1,
38 				M_RK3399_DSP_EDP_POL,
39 				V_RK3399_DSP_EDP_POL(polarity));
40 		break;
41 
42 	case VOP_MODE_MIPI:
43 		clrsetbits_le32(&regs->dsp_ctrl1,
44 				M_RK3399_DSP_MIPI_POL,
45 				V_RK3399_DSP_MIPI_POL(polarity));
46 		break;
47 
48 	case VOP_MODE_LVDS:
49 		/* The RK3399 has neither parallel RGB nor LVDS output. */
50 	default:
51 		debug("%s: unsupported output mode %x\n", __func__, mode);
52 	}
53 }
54 
55 /*
56  * Try some common regulators. We should really get these from the
57  * device tree somehow.
58  */
59 static const char * const rk3399_regulator_names[] = {
60 	"vcc33_lcd"
61 };
62 
63 static int rk3399_vop_probe(struct udevice *dev)
64 {
65 	/* Before relocation we don't need to do anything */
66 	if (!(gd->flags & GD_FLG_RELOC))
67 		return 0;
68 
69 	/* Probe regulators required for the RK3399 VOP */
70 	rk_vop_probe_regulators(dev, rk3399_regulator_names,
71 				ARRAY_SIZE(rk3399_regulator_names));
72 
73 	return rk_vop_probe(dev);
74 }
75 
76 struct rkvop_driverdata rk3399_lit_driverdata = {
77 	.set_pin_polarity = rk3399_set_pin_polarity,
78 };
79 
80 struct rkvop_driverdata rk3399_big_driverdata = {
81 	.features = VOP_FEATURE_OUTPUT_10BIT,
82 	.set_pin_polarity = rk3399_set_pin_polarity,
83 };
84 
85 static const struct udevice_id rk3399_vop_ids[] = {
86 	{ .compatible = "rockchip,rk3399-vop-big",
87 	  .data = (ulong)&rk3399_big_driverdata },
88 	{ .compatible = "rockchip,rk3399-vop-lit",
89 	  .data = (ulong)&rk3399_lit_driverdata },
90 	{ }
91 };
92 
93 static const struct video_ops rk3399_vop_ops = {
94 };
95 
96 U_BOOT_DRIVER(rk3399_vop) = {
97 	.name	= "rk3399_vop",
98 	.id	= UCLASS_VIDEO,
99 	.of_match = rk3399_vop_ids,
100 	.ops	= &rk3399_vop_ops,
101 	.bind	= rk_vop_bind,
102 	.probe	= rk3399_vop_probe,
103 	.priv_auto_alloc_size	= sizeof(struct rk_vop_priv),
104 };
105