1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | |
3 | /* |
4 | * Copyright (C) 2022 Pengutronix, Lucas Stach <kernel@pengutronix.de> |
5 | */ |
6 | |
7 | #include <linux/clk.h> |
8 | #include <linux/mod_devicetable.h> |
9 | #include <linux/module.h> |
10 | #include <linux/platform_device.h> |
11 | #include <drm/bridge/dw_hdmi.h> |
12 | #include <drm/drm_modes.h> |
13 | |
14 | struct imx8mp_hdmi { |
15 | struct dw_hdmi_plat_data plat_data; |
16 | struct dw_hdmi *dw_hdmi; |
17 | struct clk *pixclk; |
18 | }; |
19 | |
20 | static enum drm_mode_status |
21 | imx8mp_hdmi_mode_valid(struct dw_hdmi *dw_hdmi, void *data, |
22 | const struct drm_display_info *info, |
23 | const struct drm_display_mode *mode) |
24 | { |
25 | struct imx8mp_hdmi *hdmi = (struct imx8mp_hdmi *)data; |
26 | |
27 | if (mode->clock < 13500) |
28 | return MODE_CLOCK_LOW; |
29 | |
30 | if (mode->clock > 297000) |
31 | return MODE_CLOCK_HIGH; |
32 | |
33 | if (clk_round_rate(clk: hdmi->pixclk, rate: mode->clock * 1000) != |
34 | mode->clock * 1000) |
35 | return MODE_CLOCK_RANGE; |
36 | |
37 | /* We don't support double-clocked and Interlaced modes */ |
38 | if ((mode->flags & DRM_MODE_FLAG_DBLCLK) || |
39 | (mode->flags & DRM_MODE_FLAG_INTERLACE)) |
40 | return MODE_BAD; |
41 | |
42 | return MODE_OK; |
43 | } |
44 | |
45 | static int imx8mp_hdmi_phy_init(struct dw_hdmi *dw_hdmi, void *data, |
46 | const struct drm_display_info *display, |
47 | const struct drm_display_mode *mode) |
48 | { |
49 | return 0; |
50 | } |
51 | |
52 | static void imx8mp_hdmi_phy_disable(struct dw_hdmi *dw_hdmi, void *data) |
53 | { |
54 | } |
55 | |
56 | static void im8mp_hdmi_phy_setup_hpd(struct dw_hdmi *hdmi, void *data) |
57 | { |
58 | /* |
59 | * Just release PHY core from reset, all other power management is done |
60 | * by the PHY driver. |
61 | */ |
62 | dw_hdmi_phy_gen1_reset(hdmi); |
63 | |
64 | dw_hdmi_phy_setup_hpd(hdmi, data); |
65 | } |
66 | |
67 | static const struct dw_hdmi_phy_ops imx8mp_hdmi_phy_ops = { |
68 | .init = imx8mp_hdmi_phy_init, |
69 | .disable = imx8mp_hdmi_phy_disable, |
70 | .setup_hpd = im8mp_hdmi_phy_setup_hpd, |
71 | .read_hpd = dw_hdmi_phy_read_hpd, |
72 | .update_hpd = dw_hdmi_phy_update_hpd, |
73 | }; |
74 | |
75 | static int imx8mp_dw_hdmi_probe(struct platform_device *pdev) |
76 | { |
77 | struct device *dev = &pdev->dev; |
78 | struct dw_hdmi_plat_data *plat_data; |
79 | struct imx8mp_hdmi *hdmi; |
80 | |
81 | hdmi = devm_kzalloc(dev, size: sizeof(*hdmi), GFP_KERNEL); |
82 | if (!hdmi) |
83 | return -ENOMEM; |
84 | |
85 | plat_data = &hdmi->plat_data; |
86 | |
87 | hdmi->pixclk = devm_clk_get(dev, id: "pix" ); |
88 | if (IS_ERR(ptr: hdmi->pixclk)) |
89 | return dev_err_probe(dev, err: PTR_ERR(ptr: hdmi->pixclk), |
90 | fmt: "Unable to get pixel clock\n" ); |
91 | |
92 | plat_data->mode_valid = imx8mp_hdmi_mode_valid; |
93 | plat_data->phy_ops = &imx8mp_hdmi_phy_ops; |
94 | plat_data->phy_name = "SAMSUNG HDMI TX PHY" ; |
95 | plat_data->priv_data = hdmi; |
96 | plat_data->phy_force_vendor = true; |
97 | |
98 | hdmi->dw_hdmi = dw_hdmi_probe(pdev, plat_data); |
99 | if (IS_ERR(ptr: hdmi->dw_hdmi)) |
100 | return PTR_ERR(ptr: hdmi->dw_hdmi); |
101 | |
102 | platform_set_drvdata(pdev, data: hdmi); |
103 | |
104 | return 0; |
105 | } |
106 | |
107 | static int imx8mp_dw_hdmi_remove(struct platform_device *pdev) |
108 | { |
109 | struct imx8mp_hdmi *hdmi = platform_get_drvdata(pdev); |
110 | |
111 | dw_hdmi_remove(hdmi: hdmi->dw_hdmi); |
112 | |
113 | return 0; |
114 | } |
115 | |
116 | static int __maybe_unused imx8mp_dw_hdmi_pm_suspend(struct device *dev) |
117 | { |
118 | return 0; |
119 | } |
120 | |
121 | static int __maybe_unused imx8mp_dw_hdmi_pm_resume(struct device *dev) |
122 | { |
123 | struct imx8mp_hdmi *hdmi = dev_get_drvdata(dev); |
124 | |
125 | dw_hdmi_resume(hdmi: hdmi->dw_hdmi); |
126 | |
127 | return 0; |
128 | } |
129 | |
130 | static const struct dev_pm_ops imx8mp_dw_hdmi_pm_ops = { |
131 | SET_SYSTEM_SLEEP_PM_OPS(imx8mp_dw_hdmi_pm_suspend, |
132 | imx8mp_dw_hdmi_pm_resume) |
133 | }; |
134 | |
135 | static const struct of_device_id imx8mp_dw_hdmi_of_table[] = { |
136 | { .compatible = "fsl,imx8mp-hdmi-tx" }, |
137 | { /* Sentinel */ } |
138 | }; |
139 | MODULE_DEVICE_TABLE(of, imx8mp_dw_hdmi_of_table); |
140 | |
141 | static struct platform_driver imx8mp_dw_hdmi_platform_driver = { |
142 | .probe = imx8mp_dw_hdmi_probe, |
143 | .remove = imx8mp_dw_hdmi_remove, |
144 | .driver = { |
145 | .name = "imx8mp-dw-hdmi-tx" , |
146 | .of_match_table = imx8mp_dw_hdmi_of_table, |
147 | .pm = &imx8mp_dw_hdmi_pm_ops, |
148 | }, |
149 | }; |
150 | |
151 | module_platform_driver(imx8mp_dw_hdmi_platform_driver); |
152 | |
153 | MODULE_DESCRIPTION("i.MX8MP HDMI encoder driver" ); |
154 | MODULE_LICENSE("GPL" ); |
155 | |