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6#include <linux/component.h>
7#include <linux/module.h>
8#include <linux/of_device.h>
9#include <linux/platform_device.h>
10
11#include <drm/drm_crtc_helper.h>
12#include <drm/drm_of.h>
13
14#include "sun8i_dw_hdmi.h"
15#include "sun8i_tcon_top.h"
16
17static void sun8i_dw_hdmi_encoder_mode_set(struct drm_encoder *encoder,
18 struct drm_display_mode *mode,
19 struct drm_display_mode *adj_mode)
20{
21 struct sun8i_dw_hdmi *hdmi = encoder_to_sun8i_dw_hdmi(encoder);
22
23 if (hdmi->quirks->set_rate)
24 clk_set_rate(hdmi->clk_tmds, mode->crtc_clock * 1000);
25}
26
27static const struct drm_encoder_helper_funcs
28sun8i_dw_hdmi_encoder_helper_funcs = {
29 .mode_set = sun8i_dw_hdmi_encoder_mode_set,
30};
31
32static const struct drm_encoder_funcs sun8i_dw_hdmi_encoder_funcs = {
33 .destroy = drm_encoder_cleanup,
34};
35
36static enum drm_mode_status
37sun8i_dw_hdmi_mode_valid_a83t(struct drm_connector *connector,
38 const struct drm_display_mode *mode)
39{
40 if (mode->clock > 297000)
41 return MODE_CLOCK_HIGH;
42
43 return MODE_OK;
44}
45
46static enum drm_mode_status
47sun8i_dw_hdmi_mode_valid_h6(struct drm_connector *connector,
48 const struct drm_display_mode *mode)
49{
50
51
52
53
54
55
56 if (mode->clock > 340000)
57 return MODE_CLOCK_HIGH;
58
59 return MODE_OK;
60}
61
62static bool sun8i_dw_hdmi_node_is_tcon_top(struct device_node *node)
63{
64 return IS_ENABLED(CONFIG_DRM_SUN8I_TCON_TOP) &&
65 !!of_match_node(sun8i_tcon_top_of_table, node);
66}
67
68static u32 sun8i_dw_hdmi_find_possible_crtcs(struct drm_device *drm,
69 struct device_node *node)
70{
71 struct device_node *port, *ep, *remote, *remote_port;
72 u32 crtcs = 0;
73
74 remote = of_graph_get_remote_node(node, 0, -1);
75 if (!remote)
76 return 0;
77
78 if (sun8i_dw_hdmi_node_is_tcon_top(remote)) {
79 port = of_graph_get_port_by_id(remote, 4);
80 if (!port)
81 goto crtcs_exit;
82
83 for_each_child_of_node(port, ep) {
84 remote_port = of_graph_get_remote_port(ep);
85 if (remote_port) {
86 crtcs |= drm_of_crtc_port_mask(drm, remote_port);
87 of_node_put(remote_port);
88 }
89 }
90 } else {
91 crtcs = drm_of_find_possible_crtcs(drm, node);
92 }
93
94crtcs_exit:
95 of_node_put(remote);
96
97 return crtcs;
98}
99
100static int sun8i_dw_hdmi_find_connector_pdev(struct device *dev,
101 struct platform_device **pdev_out)
102{
103 struct platform_device *pdev;
104 struct device_node *remote;
105
106 remote = of_graph_get_remote_node(dev->of_node, 1, -1);
107 if (!remote)
108 return -ENODEV;
109
110 if (!of_device_is_compatible(remote, "hdmi-connector")) {
111 of_node_put(remote);
112 return -ENODEV;
113 }
114
115 pdev = of_find_device_by_node(remote);
116 of_node_put(remote);
117 if (!pdev)
118 return -ENODEV;
119
120 *pdev_out = pdev;
121 return 0;
122}
123
124static int sun8i_dw_hdmi_bind(struct device *dev, struct device *master,
125 void *data)
126{
127 struct platform_device *pdev = to_platform_device(dev), *connector_pdev;
128 struct dw_hdmi_plat_data *plat_data;
129 struct drm_device *drm = data;
130 struct device_node *phy_node;
131 struct drm_encoder *encoder;
132 struct sun8i_dw_hdmi *hdmi;
133 int ret;
134
135 if (!pdev->dev.of_node)
136 return -ENODEV;
137
138 hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL);
139 if (!hdmi)
140 return -ENOMEM;
141
142 plat_data = &hdmi->plat_data;
143 hdmi->dev = &pdev->dev;
144 encoder = &hdmi->encoder;
145
146 hdmi->quirks = of_device_get_match_data(dev);
147
148 encoder->possible_crtcs =
149 sun8i_dw_hdmi_find_possible_crtcs(drm, dev->of_node);
150
151
152
153
154
155
156 if (encoder->possible_crtcs == 0)
157 return -EPROBE_DEFER;
158
159 hdmi->rst_ctrl = devm_reset_control_get(dev, "ctrl");
160 if (IS_ERR(hdmi->rst_ctrl)) {
161 dev_err(dev, "Could not get ctrl reset control\n");
162 return PTR_ERR(hdmi->rst_ctrl);
163 }
164
165 hdmi->clk_tmds = devm_clk_get(dev, "tmds");
166 if (IS_ERR(hdmi->clk_tmds)) {
167 dev_err(dev, "Couldn't get the tmds clock\n");
168 return PTR_ERR(hdmi->clk_tmds);
169 }
170
171 hdmi->regulator = devm_regulator_get(dev, "hvcc");
172 if (IS_ERR(hdmi->regulator)) {
173 dev_err(dev, "Couldn't get regulator\n");
174 return PTR_ERR(hdmi->regulator);
175 }
176
177 ret = sun8i_dw_hdmi_find_connector_pdev(dev, &connector_pdev);
178 if (!ret) {
179 hdmi->ddc_en = gpiod_get_optional(&connector_pdev->dev,
180 "ddc-en", GPIOD_OUT_HIGH);
181 platform_device_put(connector_pdev);
182
183 if (IS_ERR(hdmi->ddc_en)) {
184 dev_err(dev, "Couldn't get ddc-en gpio\n");
185 return PTR_ERR(hdmi->ddc_en);
186 }
187 }
188
189 ret = regulator_enable(hdmi->regulator);
190 if (ret) {
191 dev_err(dev, "Failed to enable regulator\n");
192 goto err_unref_ddc_en;
193 }
194
195 gpiod_set_value(hdmi->ddc_en, 1);
196
197 ret = reset_control_deassert(hdmi->rst_ctrl);
198 if (ret) {
199 dev_err(dev, "Could not deassert ctrl reset control\n");
200 goto err_disable_ddc_en;
201 }
202
203 ret = clk_prepare_enable(hdmi->clk_tmds);
204 if (ret) {
205 dev_err(dev, "Could not enable tmds clock\n");
206 goto err_assert_ctrl_reset;
207 }
208
209 phy_node = of_parse_phandle(dev->of_node, "phys", 0);
210 if (!phy_node) {
211 dev_err(dev, "Can't found PHY phandle\n");
212 goto err_disable_clk_tmds;
213 }
214
215 ret = sun8i_hdmi_phy_probe(hdmi, phy_node);
216 of_node_put(phy_node);
217 if (ret) {
218 dev_err(dev, "Couldn't get the HDMI PHY\n");
219 goto err_disable_clk_tmds;
220 }
221
222 drm_encoder_helper_add(encoder, &sun8i_dw_hdmi_encoder_helper_funcs);
223 drm_encoder_init(drm, encoder, &sun8i_dw_hdmi_encoder_funcs,
224 DRM_MODE_ENCODER_TMDS, NULL);
225
226 sun8i_hdmi_phy_init(hdmi->phy);
227
228 plat_data->mode_valid = hdmi->quirks->mode_valid;
229 plat_data->use_drm_infoframe = hdmi->quirks->use_drm_infoframe;
230 sun8i_hdmi_phy_set_ops(hdmi->phy, plat_data);
231
232 platform_set_drvdata(pdev, hdmi);
233
234 hdmi->hdmi = dw_hdmi_bind(pdev, encoder, plat_data);
235
236
237
238
239
240 if (IS_ERR(hdmi->hdmi)) {
241 ret = PTR_ERR(hdmi->hdmi);
242 goto cleanup_encoder;
243 }
244
245 return 0;
246
247cleanup_encoder:
248 drm_encoder_cleanup(encoder);
249 sun8i_hdmi_phy_remove(hdmi);
250err_disable_clk_tmds:
251 clk_disable_unprepare(hdmi->clk_tmds);
252err_assert_ctrl_reset:
253 reset_control_assert(hdmi->rst_ctrl);
254err_disable_ddc_en:
255 gpiod_set_value(hdmi->ddc_en, 0);
256 regulator_disable(hdmi->regulator);
257err_unref_ddc_en:
258 if (hdmi->ddc_en)
259 gpiod_put(hdmi->ddc_en);
260
261 return ret;
262}
263
264static void sun8i_dw_hdmi_unbind(struct device *dev, struct device *master,
265 void *data)
266{
267 struct sun8i_dw_hdmi *hdmi = dev_get_drvdata(dev);
268
269 dw_hdmi_unbind(hdmi->hdmi);
270 sun8i_hdmi_phy_remove(hdmi);
271 clk_disable_unprepare(hdmi->clk_tmds);
272 reset_control_assert(hdmi->rst_ctrl);
273 gpiod_set_value(hdmi->ddc_en, 0);
274 regulator_disable(hdmi->regulator);
275
276 if (hdmi->ddc_en)
277 gpiod_put(hdmi->ddc_en);
278}
279
280static const struct component_ops sun8i_dw_hdmi_ops = {
281 .bind = sun8i_dw_hdmi_bind,
282 .unbind = sun8i_dw_hdmi_unbind,
283};
284
285static int sun8i_dw_hdmi_probe(struct platform_device *pdev)
286{
287 return component_add(&pdev->dev, &sun8i_dw_hdmi_ops);
288}
289
290static int sun8i_dw_hdmi_remove(struct platform_device *pdev)
291{
292 component_del(&pdev->dev, &sun8i_dw_hdmi_ops);
293
294 return 0;
295}
296
297static const struct sun8i_dw_hdmi_quirks sun8i_a83t_quirks = {
298 .mode_valid = sun8i_dw_hdmi_mode_valid_a83t,
299 .set_rate = true,
300};
301
302static const struct sun8i_dw_hdmi_quirks sun50i_h6_quirks = {
303 .mode_valid = sun8i_dw_hdmi_mode_valid_h6,
304 .use_drm_infoframe = true,
305};
306
307static const struct of_device_id sun8i_dw_hdmi_dt_ids[] = {
308 {
309 .compatible = "allwinner,sun8i-a83t-dw-hdmi",
310 .data = &sun8i_a83t_quirks,
311 },
312 {
313 .compatible = "allwinner,sun50i-h6-dw-hdmi",
314 .data = &sun50i_h6_quirks,
315 },
316 { },
317};
318MODULE_DEVICE_TABLE(of, sun8i_dw_hdmi_dt_ids);
319
320static struct platform_driver sun8i_dw_hdmi_pltfm_driver = {
321 .probe = sun8i_dw_hdmi_probe,
322 .remove = sun8i_dw_hdmi_remove,
323 .driver = {
324 .name = "sun8i-dw-hdmi",
325 .of_match_table = sun8i_dw_hdmi_dt_ids,
326 },
327};
328module_platform_driver(sun8i_dw_hdmi_pltfm_driver);
329
330MODULE_AUTHOR("Jernej Skrabec <jernej.skrabec@siol.net>");
331MODULE_DESCRIPTION("Allwinner DW HDMI bridge");
332MODULE_LICENSE("GPL");
333
