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18#include <linux/gpio.h>
19#include <linux/pinctrl/consumer.h>
20
21#include "msm_kms.h"
22#include "hdmi.h"
23
24struct hdmi_connector {
25 struct drm_connector base;
26 struct hdmi *hdmi;
27 struct work_struct hpd_work;
28};
29#define to_hdmi_connector(x) container_of(x, struct hdmi_connector, base)
30
31static void msm_hdmi_phy_reset(struct hdmi *hdmi)
32{
33 unsigned int val;
34
35 val = hdmi_read(hdmi, REG_HDMI_PHY_CTRL);
36
37 if (val & HDMI_PHY_CTRL_SW_RESET_LOW) {
38
39 hdmi_write(hdmi, REG_HDMI_PHY_CTRL,
40 val & ~HDMI_PHY_CTRL_SW_RESET);
41 } else {
42
43 hdmi_write(hdmi, REG_HDMI_PHY_CTRL,
44 val | HDMI_PHY_CTRL_SW_RESET);
45 }
46
47 if (val & HDMI_PHY_CTRL_SW_RESET_PLL_LOW) {
48
49 hdmi_write(hdmi, REG_HDMI_PHY_CTRL,
50 val & ~HDMI_PHY_CTRL_SW_RESET_PLL);
51 } else {
52
53 hdmi_write(hdmi, REG_HDMI_PHY_CTRL,
54 val | HDMI_PHY_CTRL_SW_RESET_PLL);
55 }
56
57 msleep(100);
58
59 if (val & HDMI_PHY_CTRL_SW_RESET_LOW) {
60
61 hdmi_write(hdmi, REG_HDMI_PHY_CTRL,
62 val | HDMI_PHY_CTRL_SW_RESET);
63 } else {
64
65 hdmi_write(hdmi, REG_HDMI_PHY_CTRL,
66 val & ~HDMI_PHY_CTRL_SW_RESET);
67 }
68
69 if (val & HDMI_PHY_CTRL_SW_RESET_PLL_LOW) {
70
71 hdmi_write(hdmi, REG_HDMI_PHY_CTRL,
72 val | HDMI_PHY_CTRL_SW_RESET_PLL);
73 } else {
74
75 hdmi_write(hdmi, REG_HDMI_PHY_CTRL,
76 val & ~HDMI_PHY_CTRL_SW_RESET_PLL);
77 }
78}
79
80static int gpio_config(struct hdmi *hdmi, bool on)
81{
82 struct device *dev = &hdmi->pdev->dev;
83 const struct hdmi_platform_config *config = hdmi->config;
84 int ret, i;
85
86 if (on) {
87 for (i = 0; i < HDMI_MAX_NUM_GPIO; i++) {
88 struct hdmi_gpio_data gpio = config->gpios[i];
89
90 if (gpio.num != -1) {
91 ret = gpio_request(gpio.num, gpio.label);
92 if (ret) {
93 dev_err(dev,
94 "'%s'(%d) gpio_request failed: %d\n",
95 gpio.label, gpio.num, ret);
96 goto err;
97 }
98
99 if (gpio.output) {
100 gpio_direction_output(gpio.num,
101 gpio.value);
102 } else {
103 gpio_direction_input(gpio.num);
104 gpio_set_value_cansleep(gpio.num,
105 gpio.value);
106 }
107 }
108 }
109
110 DBG("gpio on");
111 } else {
112 for (i = 0; i < HDMI_MAX_NUM_GPIO; i++) {
113 struct hdmi_gpio_data gpio = config->gpios[i];
114
115 if (gpio.num == -1)
116 continue;
117
118 if (gpio.output) {
119 int value = gpio.value ? 0 : 1;
120
121 gpio_set_value_cansleep(gpio.num, value);
122 }
123
124 gpio_free(gpio.num);
125 };
126
127 DBG("gpio off");
128 }
129
130 return 0;
131err:
132 while (i--) {
133 if (config->gpios[i].num != -1)
134 gpio_free(config->gpios[i].num);
135 }
136
137 return ret;
138}
139
140static int hpd_enable(struct hdmi_connector *hdmi_connector)
141{
142 struct hdmi *hdmi = hdmi_connector->hdmi;
143 const struct hdmi_platform_config *config = hdmi->config;
144 struct device *dev = &hdmi->pdev->dev;
145 uint32_t hpd_ctrl;
146 int i, ret;
147 unsigned long flags;
148
149 for (i = 0; i < config->hpd_reg_cnt; i++) {
150 ret = regulator_enable(hdmi->hpd_regs[i]);
151 if (ret) {
152 dev_err(dev, "failed to enable hpd regulator: %s (%d)\n",
153 config->hpd_reg_names[i], ret);
154 goto fail;
155 }
156 }
157
158 ret = pinctrl_pm_select_default_state(dev);
159 if (ret) {
160 dev_err(dev, "pinctrl state chg failed: %d\n", ret);
161 goto fail;
162 }
163
164 ret = gpio_config(hdmi, true);
165 if (ret) {
166 dev_err(dev, "failed to configure GPIOs: %d\n", ret);
167 goto fail;
168 }
169
170 for (i = 0; i < config->hpd_clk_cnt; i++) {
171 if (config->hpd_freq && config->hpd_freq[i]) {
172 ret = clk_set_rate(hdmi->hpd_clks[i],
173 config->hpd_freq[i]);
174 if (ret)
175 dev_warn(dev, "failed to set clk %s (%d)\n",
176 config->hpd_clk_names[i], ret);
177 }
178
179 ret = clk_prepare_enable(hdmi->hpd_clks[i]);
180 if (ret) {
181 dev_err(dev, "failed to enable hpd clk: %s (%d)\n",
182 config->hpd_clk_names[i], ret);
183 goto fail;
184 }
185 }
186
187 msm_hdmi_set_mode(hdmi, false);
188 msm_hdmi_phy_reset(hdmi);
189 msm_hdmi_set_mode(hdmi, true);
190
191 hdmi_write(hdmi, REG_HDMI_USEC_REFTIMER, 0x0001001b);
192
193
194 hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL,
195 HDMI_HPD_INT_CTRL_INT_CONNECT |
196 HDMI_HPD_INT_CTRL_INT_EN);
197
198
199 spin_lock_irqsave(&hdmi->reg_lock, flags);
200 hpd_ctrl = hdmi_read(hdmi, REG_HDMI_HPD_CTRL);
201 hpd_ctrl |= HDMI_HPD_CTRL_TIMEOUT(0x1fff);
202
203
204 hdmi_write(hdmi, REG_HDMI_HPD_CTRL,
205 ~HDMI_HPD_CTRL_ENABLE & hpd_ctrl);
206 hdmi_write(hdmi, REG_HDMI_HPD_CTRL,
207 HDMI_HPD_CTRL_ENABLE | hpd_ctrl);
208 spin_unlock_irqrestore(&hdmi->reg_lock, flags);
209
210 return 0;
211
212fail:
213 return ret;
214}
215
216static void hdp_disable(struct hdmi_connector *hdmi_connector)
217{
218 struct hdmi *hdmi = hdmi_connector->hdmi;
219 const struct hdmi_platform_config *config = hdmi->config;
220 struct device *dev = &hdmi->pdev->dev;
221 int i, ret = 0;
222
223
224 hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL, 0);
225
226 msm_hdmi_set_mode(hdmi, false);
227
228 for (i = 0; i < config->hpd_clk_cnt; i++)
229 clk_disable_unprepare(hdmi->hpd_clks[i]);
230
231 ret = gpio_config(hdmi, false);
232 if (ret)
233 dev_warn(dev, "failed to unconfigure GPIOs: %d\n", ret);
234
235 ret = pinctrl_pm_select_sleep_state(dev);
236 if (ret)
237 dev_warn(dev, "pinctrl state chg failed: %d\n", ret);
238
239 for (i = 0; i < config->hpd_reg_cnt; i++) {
240 ret = regulator_disable(hdmi->hpd_regs[i]);
241 if (ret)
242 dev_warn(dev, "failed to disable hpd regulator: %s (%d)\n",
243 config->hpd_reg_names[i], ret);
244 }
245}
246
247static void
248msm_hdmi_hotplug_work(struct work_struct *work)
249{
250 struct hdmi_connector *hdmi_connector =
251 container_of(work, struct hdmi_connector, hpd_work);
252 struct drm_connector *connector = &hdmi_connector->base;
253 drm_helper_hpd_irq_event(connector->dev);
254}
255
256void msm_hdmi_connector_irq(struct drm_connector *connector)
257{
258 struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
259 struct hdmi *hdmi = hdmi_connector->hdmi;
260 uint32_t hpd_int_status, hpd_int_ctrl;
261
262
263 hpd_int_status = hdmi_read(hdmi, REG_HDMI_HPD_INT_STATUS);
264 hpd_int_ctrl = hdmi_read(hdmi, REG_HDMI_HPD_INT_CTRL);
265
266 if ((hpd_int_ctrl & HDMI_HPD_INT_CTRL_INT_EN) &&
267 (hpd_int_status & HDMI_HPD_INT_STATUS_INT)) {
268 bool detected = !!(hpd_int_status & HDMI_HPD_INT_STATUS_CABLE_DETECTED);
269
270
271 hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL,
272 HDMI_HPD_INT_CTRL_INT_ACK);
273
274 DBG("status=%04x, ctrl=%04x", hpd_int_status, hpd_int_ctrl);
275
276
277 hpd_int_ctrl = HDMI_HPD_INT_CTRL_INT_EN;
278 if (!detected)
279 hpd_int_ctrl |= HDMI_HPD_INT_CTRL_INT_CONNECT;
280 hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL, hpd_int_ctrl);
281
282 queue_work(hdmi->workq, &hdmi_connector->hpd_work);
283 }
284}
285
286static enum drm_connector_status detect_reg(struct hdmi *hdmi)
287{
288 uint32_t hpd_int_status = hdmi_read(hdmi, REG_HDMI_HPD_INT_STATUS);
289 return (hpd_int_status & HDMI_HPD_INT_STATUS_CABLE_DETECTED) ?
290 connector_status_connected : connector_status_disconnected;
291}
292
293#define HPD_GPIO_INDEX 2
294static enum drm_connector_status detect_gpio(struct hdmi *hdmi)
295{
296 const struct hdmi_platform_config *config = hdmi->config;
297 struct hdmi_gpio_data hpd_gpio = config->gpios[HPD_GPIO_INDEX];
298
299 return gpio_get_value(hpd_gpio.num) ?
300 connector_status_connected :
301 connector_status_disconnected;
302}
303
304static enum drm_connector_status hdmi_connector_detect(
305 struct drm_connector *connector, bool force)
306{
307 struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
308 struct hdmi *hdmi = hdmi_connector->hdmi;
309 const struct hdmi_platform_config *config = hdmi->config;
310 struct hdmi_gpio_data hpd_gpio = config->gpios[HPD_GPIO_INDEX];
311 enum drm_connector_status stat_gpio, stat_reg;
312 int retry = 20;
313
314
315
316
317
318 if (hpd_gpio.num == -1)
319 return detect_reg(hdmi);
320
321 do {
322 stat_gpio = detect_gpio(hdmi);
323 stat_reg = detect_reg(hdmi);
324
325 if (stat_gpio == stat_reg)
326 break;
327
328 mdelay(10);
329 } while (--retry);
330
331
332
333
334
335 if (stat_gpio != stat_reg) {
336 DBG("HDMI_HPD_INT_STATUS tells us: %d", stat_reg);
337 DBG("hpd gpio tells us: %d", stat_gpio);
338 }
339
340 return stat_gpio;
341}
342
343static void hdmi_connector_destroy(struct drm_connector *connector)
344{
345 struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
346
347 hdp_disable(hdmi_connector);
348
349 drm_connector_cleanup(connector);
350
351 kfree(hdmi_connector);
352}
353
354static int msm_hdmi_connector_get_modes(struct drm_connector *connector)
355{
356 struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
357 struct hdmi *hdmi = hdmi_connector->hdmi;
358 struct edid *edid;
359 uint32_t hdmi_ctrl;
360 int ret = 0;
361
362 hdmi_ctrl = hdmi_read(hdmi, REG_HDMI_CTRL);
363 hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl | HDMI_CTRL_ENABLE);
364
365 edid = drm_get_edid(connector, hdmi->i2c);
366
367 hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl);
368
369 hdmi->hdmi_mode = drm_detect_hdmi_monitor(edid);
370 drm_mode_connector_update_edid_property(connector, edid);
371
372 if (edid) {
373 ret = drm_add_edid_modes(connector, edid);
374 kfree(edid);
375 }
376
377 return ret;
378}
379
380static int msm_hdmi_connector_mode_valid(struct drm_connector *connector,
381 struct drm_display_mode *mode)
382{
383 struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
384 struct hdmi *hdmi = hdmi_connector->hdmi;
385 const struct hdmi_platform_config *config = hdmi->config;
386 struct msm_drm_private *priv = connector->dev->dev_private;
387 struct msm_kms *kms = priv->kms;
388 long actual, requested;
389
390 requested = 1000 * mode->clock;
391 actual = kms->funcs->round_pixclk(kms,
392 requested, hdmi_connector->hdmi->encoder);
393
394
395
396
397
398 if (config->pwr_clk_cnt > 0)
399 actual = clk_round_rate(hdmi->pwr_clks[0], actual);
400
401 DBG("requested=%ld, actual=%ld", requested, actual);
402
403 if (actual != requested)
404 return MODE_CLOCK_RANGE;
405
406 return 0;
407}
408
409static const struct drm_connector_funcs hdmi_connector_funcs = {
410 .dpms = drm_atomic_helper_connector_dpms,
411 .detect = hdmi_connector_detect,
412 .fill_modes = drm_helper_probe_single_connector_modes,
413 .destroy = hdmi_connector_destroy,
414 .reset = drm_atomic_helper_connector_reset,
415 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
416 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
417};
418
419static const struct drm_connector_helper_funcs msm_hdmi_connector_helper_funcs = {
420 .get_modes = msm_hdmi_connector_get_modes,
421 .mode_valid = msm_hdmi_connector_mode_valid,
422};
423
424
425struct drm_connector *msm_hdmi_connector_init(struct hdmi *hdmi)
426{
427 struct drm_connector *connector = NULL;
428 struct hdmi_connector *hdmi_connector;
429 int ret;
430
431 hdmi_connector = kzalloc(sizeof(*hdmi_connector), GFP_KERNEL);
432 if (!hdmi_connector)
433 return ERR_PTR(-ENOMEM);
434
435 hdmi_connector->hdmi = hdmi;
436 INIT_WORK(&hdmi_connector->hpd_work, msm_hdmi_hotplug_work);
437
438 connector = &hdmi_connector->base;
439
440 drm_connector_init(hdmi->dev, connector, &hdmi_connector_funcs,
441 DRM_MODE_CONNECTOR_HDMIA);
442 drm_connector_helper_add(connector, &msm_hdmi_connector_helper_funcs);
443
444 connector->polled = DRM_CONNECTOR_POLL_CONNECT |
445 DRM_CONNECTOR_POLL_DISCONNECT;
446
447 connector->interlace_allowed = 0;
448 connector->doublescan_allowed = 0;
449
450 ret = hpd_enable(hdmi_connector);
451 if (ret) {
452 dev_err(&hdmi->pdev->dev, "failed to enable HPD: %d\n", ret);
453 return ERR_PTR(ret);
454 }
455
456 drm_mode_connector_attach_encoder(connector, hdmi->encoder);
457
458 return connector;
459}
460
