1 /*
2  * Copyright (c) 2017 Theobroma Systems Design und Consulting GmbH
3  * Copyright (c) 2015 Google, Inc
4  * Copyright 2014 Rockchip Inc.
5  *
6  * SPDX-License-Identifier: GPL-2.0+
7  */
8 
9 #include <common.h>
10 #include <display.h>
11 #include <dm.h>
12 #include <regmap.h>
13 #include <video.h>
14 #include <asm/hardware.h>
15 #include <asm/io.h>
16 #include "rk_vop.h"
17 
18 DECLARE_GLOBAL_DATA_PTR;
19 
20 static void rk3399_set_pin_polarity(struct udevice *dev,
21 				    enum vop_modes mode, u32 polarity)
22 {
23 	struct rk_vop_priv *priv = dev_get_priv(dev);
24 	struct rk3288_vop *regs = priv->regs;
25 
26 	/*
27 	 * The RK3399 VOPs (v3.5 and v3.6) require a per-mode setting of
28 	 * the polarity configuration (in ctrl1).
29 	 */
30 	switch (mode) {
31 	case VOP_MODE_HDMI:
32 		clrsetbits_le32(&regs->dsp_ctrl1,
33 				M_RK3399_DSP_HDMI_POL,
34 				V_RK3399_DSP_HDMI_POL(polarity));
35 		break;
36 
37 	case VOP_MODE_EDP:
38 		clrsetbits_le32(&regs->dsp_ctrl1,
39 				M_RK3399_DSP_EDP_POL,
40 				V_RK3399_DSP_EDP_POL(polarity));
41 		break;
42 
43 	case VOP_MODE_MIPI:
44 		clrsetbits_le32(&regs->dsp_ctrl1,
45 				M_RK3399_DSP_MIPI_POL,
46 				V_RK3399_DSP_MIPI_POL(polarity));
47 		break;
48 
49 	case VOP_MODE_LVDS:
50 		/* The RK3399 has neither parallel RGB nor LVDS output. */
51 	default:
52 		debug("%s: unsupported output mode %x\n", __func__, mode);
53 	}
54 }
55 
56 /*
57  * Try some common regulators. We should really get these from the
58  * device tree somehow.
59  */
60 static const char * const rk3399_regulator_names[] = {
61 	"vcc33_lcd"
62 };
63 
64 static int rk3399_vop_probe(struct udevice *dev)
65 {
66 	/* Before relocation we don't need to do anything */
67 	if (!(gd->flags & GD_FLG_RELOC))
68 		return 0;
69 
70 	/* Probe regulators required for the RK3399 VOP */
71 	rk_vop_probe_regulators(dev, rk3399_regulator_names,
72 				ARRAY_SIZE(rk3399_regulator_names));
73 
74 	return rk_vop_probe(dev);
75 }
76 
77 struct rkvop_driverdata rk3399_lit_driverdata = {
78 	.set_pin_polarity = rk3399_set_pin_polarity,
79 };
80 
81 struct rkvop_driverdata rk3399_big_driverdata = {
82 	.features = VOP_FEATURE_OUTPUT_10BIT,
83 	.set_pin_polarity = rk3399_set_pin_polarity,
84 };
85 
86 static const struct udevice_id rk3399_vop_ids[] = {
87 	{ .compatible = "rockchip,rk3399-vop-big",
88 	  .data = (ulong)&rk3399_big_driverdata },
89 	{ .compatible = "rockchip,rk3399-vop-lit",
90 	  .data = (ulong)&rk3399_lit_driverdata },
91 	{ }
92 };
93 
94 static const struct video_ops rk3399_vop_ops = {
95 };
96 
97 U_BOOT_DRIVER(rk3399_vop) = {
98 	.name	= "rk3399_vop",
99 	.id	= UCLASS_VIDEO,
100 	.of_match = rk3399_vop_ids,
101 	.ops	= &rk3399_vop_ops,
102 	.bind	= rk_vop_bind,
103 	.probe	= rk3399_vop_probe,
104 	.priv_auto_alloc_size	= sizeof(struct rk_vop_priv),
105 };
106