1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* Copyright (C) 2011-2013 Freescale Semiconductor, Inc. |
3 | * |
4 | * derived from imx-hdmi.c(renamed to bridge/dw_hdmi.c now) |
5 | */ |
6 | |
7 | #include <linux/component.h> |
8 | #include <linux/mfd/syscon.h> |
9 | #include <linux/mfd/syscon/imx6q-iomuxc-gpr.h> |
10 | #include <linux/module.h> |
11 | #include <linux/platform_device.h> |
12 | #include <linux/regmap.h> |
13 | |
14 | #include <video/imx-ipu-v3.h> |
15 | |
16 | #include <drm/bridge/dw_hdmi.h> |
17 | #include <drm/drm_atomic_helper.h> |
18 | #include <drm/drm_bridge.h> |
19 | #include <drm/drm_edid.h> |
20 | #include <drm/drm_encoder.h> |
21 | #include <drm/drm_managed.h> |
22 | #include <drm/drm_of.h> |
23 | #include <drm/drm_simple_kms_helper.h> |
24 | |
25 | #include "imx-drm.h" |
26 | |
27 | struct imx_hdmi; |
28 | |
29 | struct imx_hdmi_encoder { |
30 | struct drm_encoder encoder; |
31 | struct imx_hdmi *hdmi; |
32 | }; |
33 | |
34 | struct imx_hdmi { |
35 | struct device *dev; |
36 | struct drm_bridge *bridge; |
37 | struct dw_hdmi *hdmi; |
38 | struct regmap *regmap; |
39 | }; |
40 | |
41 | static inline struct imx_hdmi *enc_to_imx_hdmi(struct drm_encoder *e) |
42 | { |
43 | return container_of(e, struct imx_hdmi_encoder, encoder)->hdmi; |
44 | } |
45 | |
46 | static const struct dw_hdmi_mpll_config imx_mpll_cfg[] = { |
47 | { |
48 | 45250000, { |
49 | { 0x01e0, 0x0000 }, |
50 | { 0x21e1, 0x0000 }, |
51 | { 0x41e2, 0x0000 } |
52 | }, |
53 | }, { |
54 | 92500000, { |
55 | { 0x0140, 0x0005 }, |
56 | { 0x2141, 0x0005 }, |
57 | { 0x4142, 0x0005 }, |
58 | }, |
59 | }, { |
60 | 148500000, { |
61 | { 0x00a0, 0x000a }, |
62 | { 0x20a1, 0x000a }, |
63 | { 0x40a2, 0x000a }, |
64 | }, |
65 | }, { |
66 | 216000000, { |
67 | { 0x00a0, 0x000a }, |
68 | { 0x2001, 0x000f }, |
69 | { 0x4002, 0x000f }, |
70 | }, |
71 | }, { |
72 | ~0UL, { |
73 | { 0x0000, 0x0000 }, |
74 | { 0x0000, 0x0000 }, |
75 | { 0x0000, 0x0000 }, |
76 | }, |
77 | } |
78 | }; |
79 | |
80 | static const struct dw_hdmi_curr_ctrl imx_cur_ctr[] = { |
81 | /* pixelclk bpp8 bpp10 bpp12 */ |
82 | { |
83 | 54000000, { 0x091c, 0x091c, 0x06dc }, |
84 | }, { |
85 | 58400000, { 0x091c, 0x06dc, 0x06dc }, |
86 | }, { |
87 | 72000000, { 0x06dc, 0x06dc, 0x091c }, |
88 | }, { |
89 | 74250000, { 0x06dc, 0x0b5c, 0x091c }, |
90 | }, { |
91 | 118800000, { 0x091c, 0x091c, 0x06dc }, |
92 | }, { |
93 | 216000000, { 0x06dc, 0x0b5c, 0x091c }, |
94 | }, { |
95 | ~0UL, { 0x0000, 0x0000, 0x0000 }, |
96 | }, |
97 | }; |
98 | |
99 | /* |
100 | * Resistance term 133Ohm Cfg |
101 | * PREEMP config 0.00 |
102 | * TX/CK level 10 |
103 | */ |
104 | static const struct dw_hdmi_phy_config imx_phy_config[] = { |
105 | /*pixelclk symbol term vlev */ |
106 | { 216000000, 0x800d, 0x0005, 0x01ad}, |
107 | { ~0UL, 0x0000, 0x0000, 0x0000} |
108 | }; |
109 | |
110 | static void dw_hdmi_imx_encoder_enable(struct drm_encoder *encoder) |
111 | { |
112 | struct imx_hdmi *hdmi = enc_to_imx_hdmi(e: encoder); |
113 | int mux = drm_of_encoder_active_port_id(node: hdmi->dev->of_node, encoder); |
114 | |
115 | regmap_update_bits(map: hdmi->regmap, IOMUXC_GPR3, |
116 | IMX6Q_GPR3_HDMI_MUX_CTL_MASK, |
117 | val: mux << IMX6Q_GPR3_HDMI_MUX_CTL_SHIFT); |
118 | } |
119 | |
120 | static int dw_hdmi_imx_atomic_check(struct drm_encoder *encoder, |
121 | struct drm_crtc_state *crtc_state, |
122 | struct drm_connector_state *conn_state) |
123 | { |
124 | struct imx_crtc_state *imx_crtc_state = to_imx_crtc_state(s: crtc_state); |
125 | |
126 | imx_crtc_state->bus_format = MEDIA_BUS_FMT_RGB888_1X24; |
127 | imx_crtc_state->di_hsync_pin = 2; |
128 | imx_crtc_state->di_vsync_pin = 3; |
129 | |
130 | return 0; |
131 | } |
132 | |
133 | static const struct drm_encoder_helper_funcs dw_hdmi_imx_encoder_helper_funcs = { |
134 | .enable = dw_hdmi_imx_encoder_enable, |
135 | .atomic_check = dw_hdmi_imx_atomic_check, |
136 | }; |
137 | |
138 | static enum drm_mode_status |
139 | imx6q_hdmi_mode_valid(struct dw_hdmi *hdmi, void *data, |
140 | const struct drm_display_info *info, |
141 | const struct drm_display_mode *mode) |
142 | { |
143 | if (mode->clock < 13500) |
144 | return MODE_CLOCK_LOW; |
145 | /* FIXME: Hardware is capable of 266MHz, but setup data is missing. */ |
146 | if (mode->clock > 216000) |
147 | return MODE_CLOCK_HIGH; |
148 | |
149 | return MODE_OK; |
150 | } |
151 | |
152 | static enum drm_mode_status |
153 | imx6dl_hdmi_mode_valid(struct dw_hdmi *hdmi, void *data, |
154 | const struct drm_display_info *info, |
155 | const struct drm_display_mode *mode) |
156 | { |
157 | if (mode->clock < 13500) |
158 | return MODE_CLOCK_LOW; |
159 | /* FIXME: Hardware is capable of 270MHz, but setup data is missing. */ |
160 | if (mode->clock > 216000) |
161 | return MODE_CLOCK_HIGH; |
162 | |
163 | return MODE_OK; |
164 | } |
165 | |
166 | static struct dw_hdmi_plat_data imx6q_hdmi_drv_data = { |
167 | .mpll_cfg = imx_mpll_cfg, |
168 | .cur_ctr = imx_cur_ctr, |
169 | .phy_config = imx_phy_config, |
170 | .mode_valid = imx6q_hdmi_mode_valid, |
171 | }; |
172 | |
173 | static struct dw_hdmi_plat_data imx6dl_hdmi_drv_data = { |
174 | .mpll_cfg = imx_mpll_cfg, |
175 | .cur_ctr = imx_cur_ctr, |
176 | .phy_config = imx_phy_config, |
177 | .mode_valid = imx6dl_hdmi_mode_valid, |
178 | }; |
179 | |
180 | static const struct of_device_id dw_hdmi_imx_dt_ids[] = { |
181 | { .compatible = "fsl,imx6q-hdmi" , |
182 | .data = &imx6q_hdmi_drv_data |
183 | }, { |
184 | .compatible = "fsl,imx6dl-hdmi" , |
185 | .data = &imx6dl_hdmi_drv_data |
186 | }, |
187 | {}, |
188 | }; |
189 | MODULE_DEVICE_TABLE(of, dw_hdmi_imx_dt_ids); |
190 | |
191 | static int dw_hdmi_imx_bind(struct device *dev, struct device *master, |
192 | void *data) |
193 | { |
194 | struct drm_device *drm = data; |
195 | struct imx_hdmi_encoder *hdmi_encoder; |
196 | struct drm_encoder *encoder; |
197 | int ret; |
198 | |
199 | hdmi_encoder = drmm_simple_encoder_alloc(drm, struct imx_hdmi_encoder, |
200 | encoder, DRM_MODE_ENCODER_TMDS); |
201 | if (IS_ERR(ptr: hdmi_encoder)) |
202 | return PTR_ERR(ptr: hdmi_encoder); |
203 | |
204 | hdmi_encoder->hdmi = dev_get_drvdata(dev); |
205 | encoder = &hdmi_encoder->encoder; |
206 | |
207 | ret = imx_drm_encoder_parse_of(drm, encoder, np: dev->of_node); |
208 | if (ret) |
209 | return ret; |
210 | |
211 | drm_encoder_helper_add(encoder, funcs: &dw_hdmi_imx_encoder_helper_funcs); |
212 | |
213 | return drm_bridge_attach(encoder, bridge: hdmi_encoder->hdmi->bridge, NULL, flags: 0); |
214 | } |
215 | |
216 | static const struct component_ops dw_hdmi_imx_ops = { |
217 | .bind = dw_hdmi_imx_bind, |
218 | }; |
219 | |
220 | static int dw_hdmi_imx_probe(struct platform_device *pdev) |
221 | { |
222 | struct device_node *np = pdev->dev.of_node; |
223 | const struct of_device_id *match = of_match_node(matches: dw_hdmi_imx_dt_ids, node: np); |
224 | struct imx_hdmi *hdmi; |
225 | int ret; |
226 | |
227 | hdmi = devm_kzalloc(dev: &pdev->dev, size: sizeof(*hdmi), GFP_KERNEL); |
228 | if (!hdmi) |
229 | return -ENOMEM; |
230 | |
231 | platform_set_drvdata(pdev, data: hdmi); |
232 | hdmi->dev = &pdev->dev; |
233 | |
234 | hdmi->regmap = syscon_regmap_lookup_by_phandle(np, property: "gpr" ); |
235 | if (IS_ERR(ptr: hdmi->regmap)) { |
236 | dev_err(hdmi->dev, "Unable to get gpr\n" ); |
237 | return PTR_ERR(ptr: hdmi->regmap); |
238 | } |
239 | |
240 | hdmi->hdmi = dw_hdmi_probe(pdev, plat_data: match->data); |
241 | if (IS_ERR(ptr: hdmi->hdmi)) |
242 | return PTR_ERR(ptr: hdmi->hdmi); |
243 | |
244 | hdmi->bridge = of_drm_find_bridge(np); |
245 | if (!hdmi->bridge) { |
246 | dev_err(hdmi->dev, "Unable to find bridge\n" ); |
247 | dw_hdmi_remove(hdmi: hdmi->hdmi); |
248 | return -ENODEV; |
249 | } |
250 | |
251 | ret = component_add(&pdev->dev, &dw_hdmi_imx_ops); |
252 | if (ret) |
253 | dw_hdmi_remove(hdmi: hdmi->hdmi); |
254 | |
255 | return ret; |
256 | } |
257 | |
258 | static void dw_hdmi_imx_remove(struct platform_device *pdev) |
259 | { |
260 | struct imx_hdmi *hdmi = platform_get_drvdata(pdev); |
261 | |
262 | component_del(&pdev->dev, &dw_hdmi_imx_ops); |
263 | dw_hdmi_remove(hdmi: hdmi->hdmi); |
264 | } |
265 | |
266 | static struct platform_driver dw_hdmi_imx_platform_driver = { |
267 | .probe = dw_hdmi_imx_probe, |
268 | .remove_new = dw_hdmi_imx_remove, |
269 | .driver = { |
270 | .name = "dwhdmi-imx" , |
271 | .of_match_table = dw_hdmi_imx_dt_ids, |
272 | }, |
273 | }; |
274 | |
275 | module_platform_driver(dw_hdmi_imx_platform_driver); |
276 | |
277 | MODULE_AUTHOR("Andy Yan <andy.yan@rock-chips.com>" ); |
278 | MODULE_AUTHOR("Yakir Yang <ykk@rock-chips.com>" ); |
279 | MODULE_DESCRIPTION("IMX6 Specific DW-HDMI Driver Extension" ); |
280 | MODULE_LICENSE("GPL" ); |
281 | MODULE_ALIAS("platform:dwhdmi-imx" ); |
282 | |