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 | |
16 | static 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 | |
24 | static 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 | */ |
40 | static 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 | |
46 | static enum drm_mode_status |
47 | ingenic_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 | |
60 | static 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 | |
68 | static const struct of_device_id ingenic_dw_hdmi_dt_ids[] = { |
69 | { .compatible = "ingenic,jz4780-dw-hdmi" }, |
70 | { /* Sentinel */ }, |
71 | }; |
72 | MODULE_DEVICE_TABLE(of, ingenic_dw_hdmi_dt_ids); |
73 | |
74 | static 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 | |
81 | static int ingenic_dw_hdmi_probe(struct platform_device *pdev) |
82 | { |
83 | struct dw_hdmi *hdmi; |
84 | |
85 | hdmi = dw_hdmi_probe(pdev, plat_data: &ingenic_dw_hdmi_plat_data); |
86 | if (IS_ERR(ptr: hdmi)) |
87 | return PTR_ERR(ptr: hdmi); |
88 | |
89 | return devm_add_action_or_reset(&pdev->dev, ingenic_dw_hdmi_cleanup, hdmi); |
90 | } |
91 | |
92 | static 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 | }; |
99 | module_platform_driver(ingenic_dw_hdmi_driver); |
100 | |
101 | MODULE_DESCRIPTION("JZ4780 Specific DW-HDMI Driver Extension" ); |
102 | MODULE_LICENSE("GPL v2" ); |
103 | MODULE_ALIAS("platform:dw-hdmi-ingenic" ); |
104 | |