Commit | Line | Data |
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c8afe684 RC |
1 | /* |
2 | * Copyright (C) 2013 Red Hat | |
3 | * Author: Rob Clark <robdclark@gmail.com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of the GNU General Public License version 2 as published by | |
7 | * the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program. If not, see <http://www.gnu.org/licenses/>. | |
16 | */ | |
17 | ||
18 | #include <linux/gpio.h> | |
19 | ||
dd2da6e3 | 20 | #include "msm_kms.h" |
c8afe684 RC |
21 | #include "hdmi.h" |
22 | ||
23 | struct hdmi_connector { | |
a3376e3e RC |
24 | struct drm_connector base; |
25 | struct hdmi *hdmi; | |
dada25bd | 26 | struct work_struct hpd_work; |
c8afe684 RC |
27 | }; |
28 | #define to_hdmi_connector(x) container_of(x, struct hdmi_connector, base) | |
29 | ||
30 | static int gpio_config(struct hdmi *hdmi, bool on) | |
31 | { | |
32 | struct drm_device *dev = hdmi->dev; | |
dada25bd | 33 | const struct hdmi_platform_config *config = hdmi->config; |
c8afe684 RC |
34 | int ret; |
35 | ||
36 | if (on) { | |
37 | ret = gpio_request(config->ddc_clk_gpio, "HDMI_DDC_CLK"); | |
38 | if (ret) { | |
39 | dev_err(dev->dev, "'%s'(%d) gpio_request failed: %d\n", | |
40 | "HDMI_DDC_CLK", config->ddc_clk_gpio, ret); | |
41 | goto error1; | |
42 | } | |
dada25bd RC |
43 | gpio_set_value_cansleep(config->ddc_clk_gpio, 1); |
44 | ||
c8afe684 RC |
45 | ret = gpio_request(config->ddc_data_gpio, "HDMI_DDC_DATA"); |
46 | if (ret) { | |
47 | dev_err(dev->dev, "'%s'(%d) gpio_request failed: %d\n", | |
48 | "HDMI_DDC_DATA", config->ddc_data_gpio, ret); | |
49 | goto error2; | |
50 | } | |
dada25bd RC |
51 | gpio_set_value_cansleep(config->ddc_data_gpio, 1); |
52 | ||
c8afe684 RC |
53 | ret = gpio_request(config->hpd_gpio, "HDMI_HPD"); |
54 | if (ret) { | |
55 | dev_err(dev->dev, "'%s'(%d) gpio_request failed: %d\n", | |
56 | "HDMI_HPD", config->hpd_gpio, ret); | |
57 | goto error3; | |
58 | } | |
dada25bd RC |
59 | gpio_direction_input(config->hpd_gpio); |
60 | gpio_set_value_cansleep(config->hpd_gpio, 1); | |
61 | ||
62 | if (config->mux_en_gpio != -1) { | |
63 | ret = gpio_request(config->mux_en_gpio, "HDMI_MUX_EN"); | |
c8afe684 RC |
64 | if (ret) { |
65 | dev_err(dev->dev, "'%s'(%d) gpio_request failed: %d\n", | |
dada25bd | 66 | "HDMI_MUX_SEL", config->mux_en_gpio, ret); |
c8afe684 RC |
67 | goto error4; |
68 | } | |
dada25bd RC |
69 | gpio_set_value_cansleep(config->mux_en_gpio, 1); |
70 | } | |
71 | ||
72 | if (config->mux_sel_gpio != -1) { | |
73 | ret = gpio_request(config->mux_sel_gpio, "HDMI_MUX_SEL"); | |
74 | if (ret) { | |
75 | dev_err(dev->dev, "'%s'(%d) gpio_request failed: %d\n", | |
76 | "HDMI_MUX_SEL", config->mux_sel_gpio, ret); | |
77 | goto error5; | |
78 | } | |
79 | gpio_set_value_cansleep(config->mux_sel_gpio, 0); | |
c8afe684 RC |
80 | } |
81 | DBG("gpio on"); | |
82 | } else { | |
83 | gpio_free(config->ddc_clk_gpio); | |
84 | gpio_free(config->ddc_data_gpio); | |
85 | gpio_free(config->hpd_gpio); | |
86 | ||
dada25bd RC |
87 | if (config->mux_en_gpio != -1) { |
88 | gpio_set_value_cansleep(config->mux_en_gpio, 0); | |
89 | gpio_free(config->mux_en_gpio); | |
90 | } | |
91 | ||
92 | if (config->mux_sel_gpio != -1) { | |
93 | gpio_set_value_cansleep(config->mux_sel_gpio, 1); | |
94 | gpio_free(config->mux_sel_gpio); | |
c8afe684 RC |
95 | } |
96 | DBG("gpio off"); | |
97 | } | |
98 | ||
99 | return 0; | |
100 | ||
dada25bd RC |
101 | error5: |
102 | if (config->mux_en_gpio != -1) | |
103 | gpio_free(config->mux_en_gpio); | |
c8afe684 RC |
104 | error4: |
105 | gpio_free(config->hpd_gpio); | |
106 | error3: | |
107 | gpio_free(config->ddc_data_gpio); | |
108 | error2: | |
109 | gpio_free(config->ddc_clk_gpio); | |
110 | error1: | |
111 | return ret; | |
112 | } | |
113 | ||
114 | static int hpd_enable(struct hdmi_connector *hdmi_connector) | |
115 | { | |
a3376e3e | 116 | struct hdmi *hdmi = hdmi_connector->hdmi; |
dada25bd | 117 | const struct hdmi_platform_config *config = hdmi->config; |
a3376e3e | 118 | struct drm_device *dev = hdmi_connector->base.dev; |
c8afe684 RC |
119 | struct hdmi_phy *phy = hdmi->phy; |
120 | uint32_t hpd_ctrl; | |
dada25bd | 121 | int i, ret; |
c8afe684 RC |
122 | |
123 | ret = gpio_config(hdmi, true); | |
124 | if (ret) { | |
125 | dev_err(dev->dev, "failed to configure GPIOs: %d\n", ret); | |
126 | goto fail; | |
127 | } | |
128 | ||
dada25bd RC |
129 | for (i = 0; i < config->hpd_clk_cnt; i++) { |
130 | ret = clk_prepare_enable(hdmi->hpd_clks[i]); | |
131 | if (ret) { | |
132 | dev_err(dev->dev, "failed to enable hpd clk: %s (%d)\n", | |
133 | config->hpd_clk_names[i], ret); | |
134 | goto fail; | |
135 | } | |
c8afe684 RC |
136 | } |
137 | ||
dada25bd RC |
138 | for (i = 0; i < config->hpd_reg_cnt; i++) { |
139 | ret = regulator_enable(hdmi->hpd_regs[i]); | |
140 | if (ret) { | |
141 | dev_err(dev->dev, "failed to enable hpd regulator: %s (%d)\n", | |
142 | config->hpd_reg_names[i], ret); | |
143 | goto fail; | |
144 | } | |
c8afe684 RC |
145 | } |
146 | ||
147 | hdmi_set_mode(hdmi, false); | |
148 | phy->funcs->reset(phy); | |
149 | hdmi_set_mode(hdmi, true); | |
150 | ||
151 | hdmi_write(hdmi, REG_HDMI_USEC_REFTIMER, 0x0001001b); | |
152 | ||
153 | /* enable HPD events: */ | |
154 | hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL, | |
155 | HDMI_HPD_INT_CTRL_INT_CONNECT | | |
156 | HDMI_HPD_INT_CTRL_INT_EN); | |
157 | ||
158 | /* set timeout to 4.1ms (max) for hardware debounce */ | |
159 | hpd_ctrl = hdmi_read(hdmi, REG_HDMI_HPD_CTRL); | |
160 | hpd_ctrl |= HDMI_HPD_CTRL_TIMEOUT(0x1fff); | |
161 | ||
162 | /* Toggle HPD circuit to trigger HPD sense */ | |
163 | hdmi_write(hdmi, REG_HDMI_HPD_CTRL, | |
164 | ~HDMI_HPD_CTRL_ENABLE & hpd_ctrl); | |
165 | hdmi_write(hdmi, REG_HDMI_HPD_CTRL, | |
166 | HDMI_HPD_CTRL_ENABLE | hpd_ctrl); | |
167 | ||
168 | return 0; | |
169 | ||
170 | fail: | |
171 | return ret; | |
172 | } | |
173 | ||
174 | static int hdp_disable(struct hdmi_connector *hdmi_connector) | |
175 | { | |
a3376e3e | 176 | struct hdmi *hdmi = hdmi_connector->hdmi; |
dada25bd | 177 | const struct hdmi_platform_config *config = hdmi->config; |
a3376e3e | 178 | struct drm_device *dev = hdmi_connector->base.dev; |
dada25bd | 179 | int i, ret = 0; |
c8afe684 RC |
180 | |
181 | /* Disable HPD interrupt */ | |
182 | hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL, 0); | |
183 | ||
184 | hdmi_set_mode(hdmi, false); | |
185 | ||
dada25bd RC |
186 | for (i = 0; i < config->hpd_reg_cnt; i++) { |
187 | ret = regulator_disable(hdmi->hpd_regs[i]); | |
188 | if (ret) { | |
189 | dev_err(dev->dev, "failed to disable hpd regulator: %s (%d)\n", | |
190 | config->hpd_reg_names[i], ret); | |
191 | goto fail; | |
192 | } | |
c8afe684 RC |
193 | } |
194 | ||
dada25bd RC |
195 | for (i = 0; i < config->hpd_clk_cnt; i++) |
196 | clk_disable_unprepare(hdmi->hpd_clks[i]); | |
c8afe684 RC |
197 | |
198 | ret = gpio_config(hdmi, false); | |
199 | if (ret) { | |
200 | dev_err(dev->dev, "failed to unconfigure GPIOs: %d\n", ret); | |
201 | goto fail; | |
202 | } | |
203 | ||
204 | return 0; | |
205 | ||
206 | fail: | |
207 | return ret; | |
208 | } | |
209 | ||
dada25bd RC |
210 | static void |
211 | hotplug_work(struct work_struct *work) | |
212 | { | |
213 | struct hdmi_connector *hdmi_connector = | |
214 | container_of(work, struct hdmi_connector, hpd_work); | |
215 | struct drm_connector *connector = &hdmi_connector->base; | |
216 | drm_helper_hpd_irq_event(connector->dev); | |
217 | } | |
218 | ||
c8afe684 RC |
219 | void hdmi_connector_irq(struct drm_connector *connector) |
220 | { | |
a3376e3e | 221 | struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector); |
dada25bd | 222 | struct msm_drm_private *priv = connector->dev->dev_private; |
a3376e3e | 223 | struct hdmi *hdmi = hdmi_connector->hdmi; |
c8afe684 RC |
224 | uint32_t hpd_int_status, hpd_int_ctrl; |
225 | ||
226 | /* Process HPD: */ | |
227 | hpd_int_status = hdmi_read(hdmi, REG_HDMI_HPD_INT_STATUS); | |
228 | hpd_int_ctrl = hdmi_read(hdmi, REG_HDMI_HPD_INT_CTRL); | |
229 | ||
230 | if ((hpd_int_ctrl & HDMI_HPD_INT_CTRL_INT_EN) && | |
231 | (hpd_int_status & HDMI_HPD_INT_STATUS_INT)) { | |
232 | bool detected = !!(hpd_int_status & HDMI_HPD_INT_STATUS_CABLE_DETECTED); | |
233 | ||
234 | DBG("status=%04x, ctrl=%04x", hpd_int_status, hpd_int_ctrl); | |
235 | ||
236 | /* ack the irq: */ | |
237 | hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL, | |
238 | hpd_int_ctrl | HDMI_HPD_INT_CTRL_INT_ACK); | |
239 | ||
c8afe684 RC |
240 | /* detect disconnect if we are connected or visa versa: */ |
241 | hpd_int_ctrl = HDMI_HPD_INT_CTRL_INT_EN; | |
242 | if (!detected) | |
243 | hpd_int_ctrl |= HDMI_HPD_INT_CTRL_INT_CONNECT; | |
244 | hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL, hpd_int_ctrl); | |
dada25bd RC |
245 | |
246 | queue_work(priv->wq, &hdmi_connector->hpd_work); | |
c8afe684 RC |
247 | } |
248 | } | |
249 | ||
250 | static enum drm_connector_status hdmi_connector_detect( | |
251 | struct drm_connector *connector, bool force) | |
252 | { | |
a3376e3e RC |
253 | struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector); |
254 | struct hdmi *hdmi = hdmi_connector->hdmi; | |
dada25bd | 255 | const struct hdmi_platform_config *config = hdmi->config; |
c8afe684 RC |
256 | uint32_t hpd_int_status; |
257 | int retry = 20; | |
258 | ||
259 | hpd_int_status = hdmi_read(hdmi, REG_HDMI_HPD_INT_STATUS); | |
260 | ||
261 | /* sense seems to in some cases be momentarily de-asserted, don't | |
262 | * let that trick us into thinking the monitor is gone: | |
263 | */ | |
264 | while (retry-- && !(hpd_int_status & HDMI_HPD_INT_STATUS_CABLE_DETECTED)) { | |
dada25bd RC |
265 | /* hdmi debounce logic seems to get stuck sometimes, |
266 | * read directly the gpio to get a second opinion: | |
267 | */ | |
268 | if (gpio_get_value(config->hpd_gpio)) { | |
269 | DBG("gpio tells us we are connected!"); | |
270 | hpd_int_status |= HDMI_HPD_INT_STATUS_CABLE_DETECTED; | |
271 | break; | |
272 | } | |
c8afe684 RC |
273 | mdelay(10); |
274 | hpd_int_status = hdmi_read(hdmi, REG_HDMI_HPD_INT_STATUS); | |
275 | DBG("status=%08x", hpd_int_status); | |
276 | } | |
277 | ||
278 | return (hpd_int_status & HDMI_HPD_INT_STATUS_CABLE_DETECTED) ? | |
279 | connector_status_connected : connector_status_disconnected; | |
280 | } | |
281 | ||
282 | static void hdmi_connector_destroy(struct drm_connector *connector) | |
283 | { | |
a3376e3e | 284 | struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector); |
c8afe684 RC |
285 | |
286 | hdp_disable(hdmi_connector); | |
287 | ||
288 | drm_sysfs_connector_remove(connector); | |
289 | drm_connector_cleanup(connector); | |
290 | ||
a3376e3e | 291 | hdmi_unreference(hdmi_connector->hdmi); |
c8afe684 RC |
292 | |
293 | kfree(hdmi_connector); | |
294 | } | |
295 | ||
296 | static int hdmi_connector_get_modes(struct drm_connector *connector) | |
297 | { | |
a3376e3e RC |
298 | struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector); |
299 | struct hdmi *hdmi = hdmi_connector->hdmi; | |
c8afe684 RC |
300 | struct edid *edid; |
301 | uint32_t hdmi_ctrl; | |
302 | int ret = 0; | |
303 | ||
304 | hdmi_ctrl = hdmi_read(hdmi, REG_HDMI_CTRL); | |
305 | hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl | HDMI_CTRL_ENABLE); | |
306 | ||
307 | edid = drm_get_edid(connector, hdmi->i2c); | |
308 | ||
309 | hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl); | |
310 | ||
311 | drm_mode_connector_update_edid_property(connector, edid); | |
312 | ||
313 | if (edid) { | |
314 | ret = drm_add_edid_modes(connector, edid); | |
315 | kfree(edid); | |
316 | } | |
317 | ||
318 | return ret; | |
319 | } | |
320 | ||
321 | static int hdmi_connector_mode_valid(struct drm_connector *connector, | |
322 | struct drm_display_mode *mode) | |
323 | { | |
a3376e3e | 324 | struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector); |
dada25bd RC |
325 | struct hdmi *hdmi = hdmi_connector->hdmi; |
326 | const struct hdmi_platform_config *config = hdmi->config; | |
c8afe684 RC |
327 | struct msm_drm_private *priv = connector->dev->dev_private; |
328 | struct msm_kms *kms = priv->kms; | |
329 | long actual, requested; | |
330 | ||
331 | requested = 1000 * mode->clock; | |
332 | actual = kms->funcs->round_pixclk(kms, | |
a3376e3e | 333 | requested, hdmi_connector->hdmi->encoder); |
c8afe684 | 334 | |
dada25bd RC |
335 | /* for mdp5/apq8074, we manage our own pixel clk (as opposed to |
336 | * mdp4/dtv stuff where pixel clk is assigned to mdp/encoder | |
337 | * instead): | |
338 | */ | |
339 | if (config->pwr_clk_cnt > 0) | |
340 | actual = clk_round_rate(hdmi->pwr_clks[0], actual); | |
341 | ||
c8afe684 RC |
342 | DBG("requested=%ld, actual=%ld", requested, actual); |
343 | ||
344 | if (actual != requested) | |
345 | return MODE_CLOCK_RANGE; | |
346 | ||
347 | return 0; | |
348 | } | |
349 | ||
a3376e3e RC |
350 | static struct drm_encoder * |
351 | hdmi_connector_best_encoder(struct drm_connector *connector) | |
352 | { | |
353 | struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector); | |
354 | return hdmi_connector->hdmi->encoder; | |
355 | } | |
356 | ||
c8afe684 RC |
357 | static const struct drm_connector_funcs hdmi_connector_funcs = { |
358 | .dpms = drm_helper_connector_dpms, | |
359 | .detect = hdmi_connector_detect, | |
360 | .fill_modes = drm_helper_probe_single_connector_modes, | |
361 | .destroy = hdmi_connector_destroy, | |
362 | }; | |
363 | ||
364 | static const struct drm_connector_helper_funcs hdmi_connector_helper_funcs = { | |
365 | .get_modes = hdmi_connector_get_modes, | |
366 | .mode_valid = hdmi_connector_mode_valid, | |
a3376e3e | 367 | .best_encoder = hdmi_connector_best_encoder, |
c8afe684 RC |
368 | }; |
369 | ||
370 | /* initialize connector */ | |
a3376e3e | 371 | struct drm_connector *hdmi_connector_init(struct hdmi *hdmi) |
c8afe684 RC |
372 | { |
373 | struct drm_connector *connector = NULL; | |
374 | struct hdmi_connector *hdmi_connector; | |
375 | int ret; | |
376 | ||
377 | hdmi_connector = kzalloc(sizeof(*hdmi_connector), GFP_KERNEL); | |
378 | if (!hdmi_connector) { | |
379 | ret = -ENOMEM; | |
380 | goto fail; | |
381 | } | |
382 | ||
a3376e3e | 383 | hdmi_connector->hdmi = hdmi_reference(hdmi); |
dada25bd | 384 | INIT_WORK(&hdmi_connector->hpd_work, hotplug_work); |
a3376e3e RC |
385 | |
386 | connector = &hdmi_connector->base; | |
c8afe684 | 387 | |
a3376e3e | 388 | drm_connector_init(hdmi->dev, connector, &hdmi_connector_funcs, |
c8afe684 RC |
389 | DRM_MODE_CONNECTOR_HDMIA); |
390 | drm_connector_helper_add(connector, &hdmi_connector_helper_funcs); | |
391 | ||
392 | connector->polled = DRM_CONNECTOR_POLL_HPD; | |
393 | ||
394 | connector->interlace_allowed = 1; | |
395 | connector->doublescan_allowed = 0; | |
396 | ||
397 | drm_sysfs_connector_add(connector); | |
398 | ||
c8afe684 RC |
399 | ret = hpd_enable(hdmi_connector); |
400 | if (ret) { | |
a3376e3e | 401 | dev_err(hdmi->dev->dev, "failed to enable HPD: %d\n", ret); |
c8afe684 RC |
402 | goto fail; |
403 | } | |
404 | ||
a3376e3e | 405 | drm_mode_connector_attach_encoder(connector, hdmi->encoder); |
c8afe684 RC |
406 | |
407 | return connector; | |
408 | ||
409 | fail: | |
410 | if (connector) | |
411 | hdmi_connector_destroy(connector); | |
412 | ||
413 | return ERR_PTR(ret); | |
414 | } |