1// SPDX-License-Identifier: GPL-2.0
2/* Copyright (C) 2011-2013 Freescale Semiconductor, Inc.
3 * Copyright (C) 2019, 2020 Paul Boddie <paul@boddie.org.uk>
4 *
5 * Derived from dw_hdmi-imx.c with i.MX portions removed.
6 */
7
8#include <linux/module.h>
9#include <linux/of_platform.h>
10#include <linux/platform_device.h>
11
12#include <drm/bridge/dw_hdmi.h>
13#include <drm/drm_of.h>
14#include <drm/drm_print.h>
15
16static const struct dw_hdmi_mpll_config ingenic_mpll_cfg[] = {
17	{ 45250000,  { { 0x01e0, 0x0000 }, { 0x21e1, 0x0000 }, { 0x41e2, 0x0000 } } },
18	{ 92500000,  { { 0x0140, 0x0005 }, { 0x2141, 0x0005 }, { 0x4142, 0x0005 } } },
19	{ 148500000, { { 0x00a0, 0x000a }, { 0x20a1, 0x000a }, { 0x40a2, 0x000a } } },
20	{ 216000000, { { 0x00a0, 0x000a }, { 0x2001, 0x000f }, { 0x4002, 0x000f } } },
21	{ ~0UL,      { { 0x0000, 0x0000 }, { 0x0000, 0x0000 }, { 0x0000, 0x0000 } } }
22};
23
24static const struct dw_hdmi_curr_ctrl ingenic_cur_ctr[] = {
25	/*pixelclk     bpp8    bpp10   bpp12 */
26	{ 54000000,  { 0x091c, 0x091c, 0x06dc } },
27	{ 58400000,  { 0x091c, 0x06dc, 0x06dc } },
28	{ 72000000,  { 0x06dc, 0x06dc, 0x091c } },
29	{ 74250000,  { 0x06dc, 0x0b5c, 0x091c } },
30	{ 118800000, { 0x091c, 0x091c, 0x06dc } },
31	{ 216000000, { 0x06dc, 0x0b5c, 0x091c } },
32	{ ~0UL,      { 0x0000, 0x0000, 0x0000 } },
33};
34
35/*
36 * Resistance term 133Ohm Cfg
37 * PREEMP config 0.00
38 * TX/CK level 10
39 */
40static const struct dw_hdmi_phy_config ingenic_phy_config[] = {
41	/*pixelclk   symbol   term   vlev */
42	{ 216000000, 0x800d, 0x0005, 0x01ad},
43	{ ~0UL,      0x0000, 0x0000, 0x0000}
44};
45
46static enum drm_mode_status
47ingenic_dw_hdmi_mode_valid(struct dw_hdmi *hdmi, void *data,
48			   const struct drm_display_info *info,
49			   const struct drm_display_mode *mode)
50{
51	if (mode->clock < 13500)
52		return MODE_CLOCK_LOW;
53	/* FIXME: Hardware is capable of 270MHz, but setup data is missing. */
54	if (mode->clock > 216000)
55		return MODE_CLOCK_HIGH;
56
57	return MODE_OK;
58}
59
60static struct dw_hdmi_plat_data ingenic_dw_hdmi_plat_data = {
61	.mpll_cfg   = ingenic_mpll_cfg,
62	.cur_ctr    = ingenic_cur_ctr,
63	.phy_config = ingenic_phy_config,
64	.mode_valid = ingenic_dw_hdmi_mode_valid,
65	.output_port	= 1,
66};
67
68static const struct of_device_id ingenic_dw_hdmi_dt_ids[] = {
69	{ .compatible = "ingenic,jz4780-dw-hdmi" },
70	{ /* Sentinel */ },
71};
72MODULE_DEVICE_TABLE(of, ingenic_dw_hdmi_dt_ids);
73
74static void ingenic_dw_hdmi_cleanup(void *data)
75{
76	struct dw_hdmi *hdmi = (struct dw_hdmi *)data;
77
78	dw_hdmi_remove(hdmi);
79}
80
81static int ingenic_dw_hdmi_probe(struct platform_device *pdev)
82{
83	struct dw_hdmi *hdmi;
84
85	hdmi = dw_hdmi_probe(pdev, &ingenic_dw_hdmi_plat_data);
86	if (IS_ERR(hdmi))
87		return PTR_ERR(hdmi);
88
89	return devm_add_action_or_reset(&pdev->dev, ingenic_dw_hdmi_cleanup, hdmi);
90}
91
92static struct platform_driver ingenic_dw_hdmi_driver = {
93	.probe  = ingenic_dw_hdmi_probe,
94	.driver = {
95		.name = "dw-hdmi-ingenic",
96		.of_match_table = ingenic_dw_hdmi_dt_ids,
97	},
98};
99module_platform_driver(ingenic_dw_hdmi_driver);
100
101MODULE_DESCRIPTION("JZ4780 Specific DW-HDMI Driver Extension");
102MODULE_LICENSE("GPL v2");
103MODULE_ALIAS("platform:dw-hdmi-ingenic");
104