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
ingenic_dw_hdmi_mode_valid(struct dw_hdmi * hdmi,void * data,const struct drm_display_info * info,const struct drm_display_mode * mode)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
ingenic_dw_hdmi_cleanup(void * data)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
ingenic_dw_hdmi_probe(struct platform_device * pdev)81 static 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
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