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5402626c BG |
1 | /* |
2 | * Copyright (C) STMicroelectronics SA 2014 | |
3 | * Author: Vincent Abriou <vincent.abriou@st.com> for STMicroelectronics. | |
4 | * License terms: GNU General Public License (GPL), version 2 | |
5 | */ | |
6 | ||
7 | #include <linux/clk.h> | |
8 | #include <linux/component.h> | |
9 | #include <linux/hdmi.h> | |
10 | #include <linux/module.h> | |
11 | #include <linux/of_gpio.h> | |
12 | #include <linux/platform_device.h> | |
13 | #include <linux/reset.h> | |
14 | ||
15 | #include <drm/drmP.h> | |
de4b00b0 | 16 | #include <drm/drm_atomic_helper.h> |
5402626c BG |
17 | #include <drm/drm_crtc_helper.h> |
18 | #include <drm/drm_edid.h> | |
19 | ||
20 | #include "sti_hdmi.h" | |
21 | #include "sti_hdmi_tx3g4c28phy.h" | |
22 | #include "sti_hdmi_tx3g0c55phy.h" | |
23 | #include "sti_vtg.h" | |
24 | ||
25 | #define HDMI_CFG 0x0000 | |
26 | #define HDMI_INT_EN 0x0004 | |
27 | #define HDMI_INT_STA 0x0008 | |
28 | #define HDMI_INT_CLR 0x000C | |
29 | #define HDMI_STA 0x0010 | |
30 | #define HDMI_ACTIVE_VID_XMIN 0x0100 | |
31 | #define HDMI_ACTIVE_VID_XMAX 0x0104 | |
32 | #define HDMI_ACTIVE_VID_YMIN 0x0108 | |
33 | #define HDMI_ACTIVE_VID_YMAX 0x010C | |
34 | #define HDMI_DFLT_CHL0_DAT 0x0110 | |
35 | #define HDMI_DFLT_CHL1_DAT 0x0114 | |
36 | #define HDMI_DFLT_CHL2_DAT 0x0118 | |
37 | #define HDMI_SW_DI_1_HEAD_WORD 0x0210 | |
38 | #define HDMI_SW_DI_1_PKT_WORD0 0x0214 | |
39 | #define HDMI_SW_DI_1_PKT_WORD1 0x0218 | |
40 | #define HDMI_SW_DI_1_PKT_WORD2 0x021C | |
41 | #define HDMI_SW_DI_1_PKT_WORD3 0x0220 | |
42 | #define HDMI_SW_DI_1_PKT_WORD4 0x0224 | |
43 | #define HDMI_SW_DI_1_PKT_WORD5 0x0228 | |
44 | #define HDMI_SW_DI_1_PKT_WORD6 0x022C | |
45 | #define HDMI_SW_DI_CFG 0x0230 | |
cffe1e89 AP |
46 | #define HDMI_SW_DI_2_HEAD_WORD 0x0600 |
47 | #define HDMI_SW_DI_2_PKT_WORD0 0x0604 | |
48 | #define HDMI_SW_DI_2_PKT_WORD1 0x0608 | |
49 | #define HDMI_SW_DI_2_PKT_WORD2 0x060C | |
50 | #define HDMI_SW_DI_2_PKT_WORD3 0x0610 | |
51 | #define HDMI_SW_DI_2_PKT_WORD4 0x0614 | |
52 | #define HDMI_SW_DI_2_PKT_WORD5 0x0618 | |
53 | #define HDMI_SW_DI_2_PKT_WORD6 0x061C | |
5402626c BG |
54 | |
55 | #define HDMI_IFRAME_SLOT_AVI 1 | |
cffe1e89 | 56 | #define HDMI_IFRAME_SLOT_AUDIO 2 |
5402626c BG |
57 | |
58 | #define XCAT(prefix, x, suffix) prefix ## x ## suffix | |
59 | #define HDMI_SW_DI_N_HEAD_WORD(x) XCAT(HDMI_SW_DI_, x, _HEAD_WORD) | |
60 | #define HDMI_SW_DI_N_PKT_WORD0(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD0) | |
61 | #define HDMI_SW_DI_N_PKT_WORD1(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD1) | |
62 | #define HDMI_SW_DI_N_PKT_WORD2(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD2) | |
63 | #define HDMI_SW_DI_N_PKT_WORD3(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD3) | |
64 | #define HDMI_SW_DI_N_PKT_WORD4(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD4) | |
65 | #define HDMI_SW_DI_N_PKT_WORD5(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD5) | |
66 | #define HDMI_SW_DI_N_PKT_WORD6(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD6) | |
67 | ||
68 | #define HDMI_IFRAME_DISABLED 0x0 | |
69 | #define HDMI_IFRAME_SINGLE_SHOT 0x1 | |
70 | #define HDMI_IFRAME_FIELD 0x2 | |
71 | #define HDMI_IFRAME_FRAME 0x3 | |
72 | #define HDMI_IFRAME_MASK 0x3 | |
73 | #define HDMI_IFRAME_CFG_DI_N(x, n) ((x) << ((n-1)*4)) /* n from 1 to 6 */ | |
74 | ||
75 | #define HDMI_CFG_DEVICE_EN BIT(0) | |
76 | #define HDMI_CFG_HDMI_NOT_DVI BIT(1) | |
77 | #define HDMI_CFG_HDCP_EN BIT(2) | |
78 | #define HDMI_CFG_ESS_NOT_OESS BIT(3) | |
79 | #define HDMI_CFG_H_SYNC_POL_NEG BIT(4) | |
80 | #define HDMI_CFG_SINK_TERM_DET_EN BIT(5) | |
81 | #define HDMI_CFG_V_SYNC_POL_NEG BIT(6) | |
82 | #define HDMI_CFG_422_EN BIT(8) | |
83 | #define HDMI_CFG_FIFO_OVERRUN_CLR BIT(12) | |
84 | #define HDMI_CFG_FIFO_UNDERRUN_CLR BIT(13) | |
85 | #define HDMI_CFG_SW_RST_EN BIT(31) | |
86 | ||
87 | #define HDMI_INT_GLOBAL BIT(0) | |
88 | #define HDMI_INT_SW_RST BIT(1) | |
89 | #define HDMI_INT_PIX_CAP BIT(3) | |
90 | #define HDMI_INT_HOT_PLUG BIT(4) | |
91 | #define HDMI_INT_DLL_LCK BIT(5) | |
92 | #define HDMI_INT_NEW_FRAME BIT(6) | |
93 | #define HDMI_INT_GENCTRL_PKT BIT(7) | |
94 | #define HDMI_INT_SINK_TERM_PRESENT BIT(11) | |
95 | ||
96 | #define HDMI_DEFAULT_INT (HDMI_INT_SINK_TERM_PRESENT \ | |
97 | | HDMI_INT_DLL_LCK \ | |
98 | | HDMI_INT_HOT_PLUG \ | |
99 | | HDMI_INT_GLOBAL) | |
100 | ||
101 | #define HDMI_WORKING_INT (HDMI_INT_SINK_TERM_PRESENT \ | |
102 | | HDMI_INT_GENCTRL_PKT \ | |
103 | | HDMI_INT_NEW_FRAME \ | |
104 | | HDMI_INT_DLL_LCK \ | |
105 | | HDMI_INT_HOT_PLUG \ | |
106 | | HDMI_INT_PIX_CAP \ | |
107 | | HDMI_INT_SW_RST \ | |
108 | | HDMI_INT_GLOBAL) | |
109 | ||
110 | #define HDMI_STA_SW_RST BIT(1) | |
111 | ||
cffe1e89 AP |
112 | #define HDMI_INFOFRAME_HEADER_TYPE(x) (((x) & 0xff) << 0) |
113 | #define HDMI_INFOFRAME_HEADER_VERSION(x) (((x) & 0xff) << 8) | |
114 | #define HDMI_INFOFRAME_HEADER_LEN(x) (((x) & 0x0f) << 16) | |
115 | ||
5402626c BG |
116 | struct sti_hdmi_connector { |
117 | struct drm_connector drm_connector; | |
118 | struct drm_encoder *encoder; | |
119 | struct sti_hdmi *hdmi; | |
120 | }; | |
121 | ||
122 | #define to_sti_hdmi_connector(x) \ | |
123 | container_of(x, struct sti_hdmi_connector, drm_connector) | |
124 | ||
125 | u32 hdmi_read(struct sti_hdmi *hdmi, int offset) | |
126 | { | |
127 | return readl(hdmi->regs + offset); | |
128 | } | |
129 | ||
130 | void hdmi_write(struct sti_hdmi *hdmi, u32 val, int offset) | |
131 | { | |
132 | writel(val, hdmi->regs + offset); | |
133 | } | |
134 | ||
135 | /** | |
136 | * HDMI interrupt handler threaded | |
137 | * | |
138 | * @irq: irq number | |
139 | * @arg: connector structure | |
140 | */ | |
141 | static irqreturn_t hdmi_irq_thread(int irq, void *arg) | |
142 | { | |
143 | struct sti_hdmi *hdmi = arg; | |
144 | ||
145 | /* Hot plug/unplug IRQ */ | |
146 | if (hdmi->irq_status & HDMI_INT_HOT_PLUG) { | |
76569207 | 147 | hdmi->hpd = readl(hdmi->regs + HDMI_STA) & HDMI_STA_HOT_PLUG; |
5402626c BG |
148 | if (hdmi->drm_dev) |
149 | drm_helper_hpd_irq_event(hdmi->drm_dev); | |
150 | } | |
151 | ||
152 | /* Sw reset and PLL lock are exclusive so we can use the same | |
153 | * event to signal them | |
154 | */ | |
155 | if (hdmi->irq_status & (HDMI_INT_SW_RST | HDMI_INT_DLL_LCK)) { | |
156 | hdmi->event_received = true; | |
157 | wake_up_interruptible(&hdmi->wait_event); | |
158 | } | |
159 | ||
160 | return IRQ_HANDLED; | |
161 | } | |
162 | ||
163 | /** | |
164 | * HDMI interrupt handler | |
165 | * | |
166 | * @irq: irq number | |
167 | * @arg: connector structure | |
168 | */ | |
169 | static irqreturn_t hdmi_irq(int irq, void *arg) | |
170 | { | |
171 | struct sti_hdmi *hdmi = arg; | |
172 | ||
173 | /* read interrupt status */ | |
174 | hdmi->irq_status = hdmi_read(hdmi, HDMI_INT_STA); | |
175 | ||
176 | /* clear interrupt status */ | |
177 | hdmi_write(hdmi, hdmi->irq_status, HDMI_INT_CLR); | |
178 | ||
179 | /* force sync bus write */ | |
180 | hdmi_read(hdmi, HDMI_INT_STA); | |
181 | ||
182 | return IRQ_WAKE_THREAD; | |
183 | } | |
184 | ||
185 | /** | |
186 | * Set hdmi active area depending on the drm display mode selected | |
187 | * | |
188 | * @hdmi: pointer on the hdmi internal structure | |
189 | */ | |
190 | static void hdmi_active_area(struct sti_hdmi *hdmi) | |
191 | { | |
192 | u32 xmin, xmax; | |
193 | u32 ymin, ymax; | |
194 | ||
8661532a VA |
195 | xmin = sti_vtg_get_pixel_number(hdmi->mode, 1); |
196 | xmax = sti_vtg_get_pixel_number(hdmi->mode, hdmi->mode.hdisplay); | |
5402626c BG |
197 | ymin = sti_vtg_get_line_number(hdmi->mode, 0); |
198 | ymax = sti_vtg_get_line_number(hdmi->mode, hdmi->mode.vdisplay - 1); | |
199 | ||
200 | hdmi_write(hdmi, xmin, HDMI_ACTIVE_VID_XMIN); | |
201 | hdmi_write(hdmi, xmax, HDMI_ACTIVE_VID_XMAX); | |
202 | hdmi_write(hdmi, ymin, HDMI_ACTIVE_VID_YMIN); | |
203 | hdmi_write(hdmi, ymax, HDMI_ACTIVE_VID_YMAX); | |
204 | } | |
205 | ||
206 | /** | |
207 | * Overall hdmi configuration | |
208 | * | |
209 | * @hdmi: pointer on the hdmi internal structure | |
210 | */ | |
211 | static void hdmi_config(struct sti_hdmi *hdmi) | |
212 | { | |
213 | u32 conf; | |
214 | ||
215 | DRM_DEBUG_DRIVER("\n"); | |
216 | ||
217 | /* Clear overrun and underrun fifo */ | |
218 | conf = HDMI_CFG_FIFO_OVERRUN_CLR | HDMI_CFG_FIFO_UNDERRUN_CLR; | |
219 | ||
220 | /* Enable HDMI mode not DVI */ | |
221 | conf |= HDMI_CFG_HDMI_NOT_DVI | HDMI_CFG_ESS_NOT_OESS; | |
222 | ||
223 | /* Enable sink term detection */ | |
224 | conf |= HDMI_CFG_SINK_TERM_DET_EN; | |
225 | ||
226 | /* Set Hsync polarity */ | |
227 | if (hdmi->mode.flags & DRM_MODE_FLAG_NHSYNC) { | |
228 | DRM_DEBUG_DRIVER("H Sync Negative\n"); | |
229 | conf |= HDMI_CFG_H_SYNC_POL_NEG; | |
230 | } | |
231 | ||
232 | /* Set Vsync polarity */ | |
233 | if (hdmi->mode.flags & DRM_MODE_FLAG_NVSYNC) { | |
234 | DRM_DEBUG_DRIVER("V Sync Negative\n"); | |
235 | conf |= HDMI_CFG_V_SYNC_POL_NEG; | |
236 | } | |
237 | ||
238 | /* Enable HDMI */ | |
239 | conf |= HDMI_CFG_DEVICE_EN; | |
240 | ||
241 | hdmi_write(hdmi, conf, HDMI_CFG); | |
242 | } | |
243 | ||
cffe1e89 AP |
244 | /** |
245 | * Helper to concatenate infoframe in 32 bits word | |
246 | * | |
247 | * @ptr: pointer on the hdmi internal structure | |
248 | * @data: infoframe to write | |
249 | * @size: size to write | |
250 | */ | |
251 | static inline unsigned int hdmi_infoframe_subpack(const u8 *ptr, size_t size) | |
252 | { | |
253 | unsigned long value = 0; | |
254 | size_t i; | |
255 | ||
256 | for (i = size; i > 0; i--) | |
257 | value = (value << 8) | ptr[i - 1]; | |
258 | ||
259 | return value; | |
260 | } | |
261 | ||
262 | /** | |
263 | * Helper to write info frame | |
264 | * | |
265 | * @hdmi: pointer on the hdmi internal structure | |
266 | * @data: infoframe to write | |
267 | * @size: size to write | |
268 | */ | |
269 | static void hdmi_infoframe_write_infopack(struct sti_hdmi *hdmi, const u8 *data) | |
270 | { | |
271 | const u8 *ptr = data; | |
272 | u32 val, slot, mode, i; | |
273 | u32 head_offset, pack_offset; | |
274 | size_t size; | |
275 | ||
276 | switch (*ptr) { | |
277 | case HDMI_INFOFRAME_TYPE_AVI: | |
278 | slot = HDMI_IFRAME_SLOT_AVI; | |
279 | mode = HDMI_IFRAME_FIELD; | |
280 | head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_AVI); | |
281 | pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_AVI); | |
282 | size = HDMI_AVI_INFOFRAME_SIZE; | |
283 | break; | |
284 | ||
285 | case HDMI_INFOFRAME_TYPE_AUDIO: | |
286 | slot = HDMI_IFRAME_SLOT_AUDIO; | |
287 | mode = HDMI_IFRAME_FRAME; | |
288 | head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_AUDIO); | |
289 | pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_AUDIO); | |
290 | size = HDMI_AUDIO_INFOFRAME_SIZE; | |
291 | break; | |
292 | ||
293 | default: | |
294 | DRM_ERROR("unsupported infoframe type: %#x\n", *ptr); | |
295 | return; | |
296 | } | |
297 | ||
298 | /* Disable transmission slot for updated infoframe */ | |
299 | val = hdmi_read(hdmi, HDMI_SW_DI_CFG); | |
300 | val &= ~HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, slot); | |
301 | hdmi_write(hdmi, val, HDMI_SW_DI_CFG); | |
302 | ||
303 | val = HDMI_INFOFRAME_HEADER_TYPE(*ptr++); | |
304 | val |= HDMI_INFOFRAME_HEADER_VERSION(*ptr++); | |
305 | val |= HDMI_INFOFRAME_HEADER_LEN(*ptr++); | |
306 | writel(val, hdmi->regs + head_offset); | |
307 | ||
308 | /* | |
309 | * Each subpack contains 4 bytes | |
310 | * The First Bytes of the first subpacket must contain the checksum | |
311 | * Packet size in increase by one. | |
312 | */ | |
313 | for (i = 0; i < size; i += sizeof(u32)) { | |
314 | size_t num; | |
315 | ||
316 | num = min_t(size_t, size - i, sizeof(u32)); | |
317 | val = hdmi_infoframe_subpack(ptr, num); | |
318 | ptr += sizeof(u32); | |
319 | writel(val, hdmi->regs + pack_offset + i); | |
320 | } | |
321 | ||
322 | /* Enable transmission slot for updated infoframe */ | |
323 | val = hdmi_read(hdmi, HDMI_SW_DI_CFG); | |
324 | val |= HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_FIELD, slot); | |
325 | hdmi_write(hdmi, val, HDMI_SW_DI_CFG); | |
326 | } | |
327 | ||
5402626c BG |
328 | /** |
329 | * Prepare and configure the AVI infoframe | |
330 | * | |
331 | * AVI infoframe are transmitted at least once per two video field and | |
332 | * contains information about HDMI transmission mode such as color space, | |
333 | * colorimetry, ... | |
334 | * | |
335 | * @hdmi: pointer on the hdmi internal structure | |
336 | * | |
337 | * Return negative value if error occurs | |
338 | */ | |
339 | static int hdmi_avi_infoframe_config(struct sti_hdmi *hdmi) | |
340 | { | |
341 | struct drm_display_mode *mode = &hdmi->mode; | |
342 | struct hdmi_avi_infoframe infoframe; | |
343 | u8 buffer[HDMI_INFOFRAME_SIZE(AVI)]; | |
5402626c BG |
344 | int ret; |
345 | ||
346 | DRM_DEBUG_DRIVER("\n"); | |
347 | ||
348 | ret = drm_hdmi_avi_infoframe_from_display_mode(&infoframe, mode); | |
349 | if (ret < 0) { | |
350 | DRM_ERROR("failed to setup AVI infoframe: %d\n", ret); | |
351 | return ret; | |
352 | } | |
353 | ||
354 | /* fixed infoframe configuration not linked to the mode */ | |
355 | infoframe.colorspace = HDMI_COLORSPACE_RGB; | |
356 | infoframe.quantization_range = HDMI_QUANTIZATION_RANGE_DEFAULT; | |
357 | infoframe.colorimetry = HDMI_COLORIMETRY_NONE; | |
358 | ||
359 | ret = hdmi_avi_infoframe_pack(&infoframe, buffer, sizeof(buffer)); | |
360 | if (ret < 0) { | |
361 | DRM_ERROR("failed to pack AVI infoframe: %d\n", ret); | |
362 | return ret; | |
363 | } | |
364 | ||
cffe1e89 | 365 | hdmi_infoframe_write_infopack(hdmi, buffer); |
5402626c | 366 | |
cffe1e89 AP |
367 | return 0; |
368 | } | |
369 | ||
370 | /** | |
371 | * Prepare and configure the AUDIO infoframe | |
372 | * | |
373 | * AUDIO infoframe are transmitted once per frame and | |
374 | * contains information about HDMI transmission mode such as audio codec, | |
375 | * sample size, ... | |
376 | * | |
377 | * @hdmi: pointer on the hdmi internal structure | |
378 | * | |
379 | * Return negative value if error occurs | |
380 | */ | |
381 | static int hdmi_audio_infoframe_config(struct sti_hdmi *hdmi) | |
382 | { | |
383 | struct hdmi_audio_infoframe infofame; | |
384 | u8 buffer[HDMI_INFOFRAME_SIZE(AUDIO)]; | |
385 | int ret; | |
386 | ||
387 | ret = hdmi_audio_infoframe_init(&infofame); | |
388 | if (ret < 0) { | |
389 | DRM_ERROR("failed to setup audio infoframe: %d\n", ret); | |
390 | return ret; | |
391 | } | |
392 | ||
393 | infofame.channels = 2; | |
394 | ||
395 | ret = hdmi_audio_infoframe_pack(&infofame, buffer, sizeof(buffer)); | |
396 | if (ret < 0) { | |
397 | DRM_ERROR("failed to pack audio infoframe: %d\n", ret); | |
398 | return ret; | |
399 | } | |
400 | ||
401 | hdmi_infoframe_write_infopack(hdmi, buffer); | |
5402626c BG |
402 | |
403 | return 0; | |
404 | } | |
405 | ||
406 | /** | |
407 | * Software reset of the hdmi subsystem | |
408 | * | |
409 | * @hdmi: pointer on the hdmi internal structure | |
410 | * | |
411 | */ | |
412 | #define HDMI_TIMEOUT_SWRESET 100 /*milliseconds */ | |
413 | static void hdmi_swreset(struct sti_hdmi *hdmi) | |
414 | { | |
415 | u32 val; | |
416 | ||
417 | DRM_DEBUG_DRIVER("\n"); | |
418 | ||
419 | /* Enable hdmi_audio clock only during hdmi reset */ | |
420 | if (clk_prepare_enable(hdmi->clk_audio)) | |
421 | DRM_INFO("Failed to prepare/enable hdmi_audio clk\n"); | |
422 | ||
423 | /* Sw reset */ | |
424 | hdmi->event_received = false; | |
425 | ||
426 | val = hdmi_read(hdmi, HDMI_CFG); | |
427 | val |= HDMI_CFG_SW_RST_EN; | |
428 | hdmi_write(hdmi, val, HDMI_CFG); | |
429 | ||
430 | /* Wait reset completed */ | |
431 | wait_event_interruptible_timeout(hdmi->wait_event, | |
432 | hdmi->event_received == true, | |
433 | msecs_to_jiffies | |
434 | (HDMI_TIMEOUT_SWRESET)); | |
435 | ||
436 | /* | |
437 | * HDMI_STA_SW_RST bit is set to '1' when SW_RST bit in HDMI_CFG is | |
438 | * set to '1' and clk_audio is running. | |
439 | */ | |
440 | if ((hdmi_read(hdmi, HDMI_STA) & HDMI_STA_SW_RST) == 0) | |
441 | DRM_DEBUG_DRIVER("Warning: HDMI sw reset timeout occurs\n"); | |
442 | ||
443 | val = hdmi_read(hdmi, HDMI_CFG); | |
444 | val &= ~HDMI_CFG_SW_RST_EN; | |
445 | hdmi_write(hdmi, val, HDMI_CFG); | |
446 | ||
447 | /* Disable hdmi_audio clock. Not used anymore for drm purpose */ | |
448 | clk_disable_unprepare(hdmi->clk_audio); | |
449 | } | |
450 | ||
451 | static void sti_hdmi_disable(struct drm_bridge *bridge) | |
452 | { | |
453 | struct sti_hdmi *hdmi = bridge->driver_private; | |
454 | ||
455 | u32 val = hdmi_read(hdmi, HDMI_CFG); | |
456 | ||
457 | if (!hdmi->enabled) | |
458 | return; | |
459 | ||
460 | DRM_DEBUG_DRIVER("\n"); | |
461 | ||
462 | /* Disable HDMI */ | |
463 | val &= ~HDMI_CFG_DEVICE_EN; | |
464 | hdmi_write(hdmi, val, HDMI_CFG); | |
465 | ||
466 | hdmi_write(hdmi, 0xffffffff, HDMI_INT_CLR); | |
467 | ||
468 | /* Stop the phy */ | |
469 | hdmi->phy_ops->stop(hdmi); | |
470 | ||
471 | /* Set the default channel data to be a dark red */ | |
472 | hdmi_write(hdmi, 0x0000, HDMI_DFLT_CHL0_DAT); | |
473 | hdmi_write(hdmi, 0x0000, HDMI_DFLT_CHL1_DAT); | |
474 | hdmi_write(hdmi, 0x0060, HDMI_DFLT_CHL2_DAT); | |
475 | ||
476 | /* Disable/unprepare hdmi clock */ | |
477 | clk_disable_unprepare(hdmi->clk_phy); | |
478 | clk_disable_unprepare(hdmi->clk_tmds); | |
479 | clk_disable_unprepare(hdmi->clk_pix); | |
480 | ||
481 | hdmi->enabled = false; | |
482 | } | |
483 | ||
484 | static void sti_hdmi_pre_enable(struct drm_bridge *bridge) | |
485 | { | |
486 | struct sti_hdmi *hdmi = bridge->driver_private; | |
487 | ||
488 | DRM_DEBUG_DRIVER("\n"); | |
489 | ||
490 | if (hdmi->enabled) | |
491 | return; | |
492 | ||
493 | /* Prepare/enable clocks */ | |
494 | if (clk_prepare_enable(hdmi->clk_pix)) | |
495 | DRM_ERROR("Failed to prepare/enable hdmi_pix clk\n"); | |
496 | if (clk_prepare_enable(hdmi->clk_tmds)) | |
497 | DRM_ERROR("Failed to prepare/enable hdmi_tmds clk\n"); | |
498 | if (clk_prepare_enable(hdmi->clk_phy)) | |
499 | DRM_ERROR("Failed to prepare/enable hdmi_rejec_pll clk\n"); | |
500 | ||
501 | hdmi->enabled = true; | |
502 | ||
503 | /* Program hdmi serializer and start phy */ | |
504 | if (!hdmi->phy_ops->start(hdmi)) { | |
505 | DRM_ERROR("Unable to start hdmi phy\n"); | |
506 | return; | |
507 | } | |
508 | ||
509 | /* Program hdmi active area */ | |
510 | hdmi_active_area(hdmi); | |
511 | ||
512 | /* Enable working interrupts */ | |
513 | hdmi_write(hdmi, HDMI_WORKING_INT, HDMI_INT_EN); | |
514 | ||
515 | /* Program hdmi config */ | |
516 | hdmi_config(hdmi); | |
517 | ||
518 | /* Program AVI infoframe */ | |
519 | if (hdmi_avi_infoframe_config(hdmi)) | |
520 | DRM_ERROR("Unable to configure AVI infoframe\n"); | |
521 | ||
cffe1e89 AP |
522 | /* Program AUDIO infoframe */ |
523 | if (hdmi_audio_infoframe_config(hdmi)) | |
524 | DRM_ERROR("Unable to configure AUDIO infoframe\n"); | |
525 | ||
5402626c BG |
526 | /* Sw reset */ |
527 | hdmi_swreset(hdmi); | |
528 | } | |
529 | ||
530 | static void sti_hdmi_set_mode(struct drm_bridge *bridge, | |
531 | struct drm_display_mode *mode, | |
532 | struct drm_display_mode *adjusted_mode) | |
533 | { | |
534 | struct sti_hdmi *hdmi = bridge->driver_private; | |
535 | int ret; | |
536 | ||
537 | DRM_DEBUG_DRIVER("\n"); | |
538 | ||
539 | /* Copy the drm display mode in the connector local structure */ | |
540 | memcpy(&hdmi->mode, mode, sizeof(struct drm_display_mode)); | |
541 | ||
542 | /* Update clock framerate according to the selected mode */ | |
543 | ret = clk_set_rate(hdmi->clk_pix, mode->clock * 1000); | |
544 | if (ret < 0) { | |
545 | DRM_ERROR("Cannot set rate (%dHz) for hdmi_pix clk\n", | |
546 | mode->clock * 1000); | |
547 | return; | |
548 | } | |
549 | ret = clk_set_rate(hdmi->clk_phy, mode->clock * 1000); | |
550 | if (ret < 0) { | |
551 | DRM_ERROR("Cannot set rate (%dHz) for hdmi_rejection_pll clk\n", | |
552 | mode->clock * 1000); | |
553 | return; | |
554 | } | |
555 | } | |
556 | ||
557 | static void sti_hdmi_bridge_nope(struct drm_bridge *bridge) | |
558 | { | |
559 | /* do nothing */ | |
560 | } | |
561 | ||
5402626c BG |
562 | static const struct drm_bridge_funcs sti_hdmi_bridge_funcs = { |
563 | .pre_enable = sti_hdmi_pre_enable, | |
564 | .enable = sti_hdmi_bridge_nope, | |
565 | .disable = sti_hdmi_disable, | |
566 | .post_disable = sti_hdmi_bridge_nope, | |
567 | .mode_set = sti_hdmi_set_mode, | |
5402626c BG |
568 | }; |
569 | ||
570 | static int sti_hdmi_connector_get_modes(struct drm_connector *connector) | |
571 | { | |
41a14623 BG |
572 | struct sti_hdmi_connector *hdmi_connector |
573 | = to_sti_hdmi_connector(connector); | |
574 | struct sti_hdmi *hdmi = hdmi_connector->hdmi; | |
5402626c BG |
575 | struct edid *edid; |
576 | int count; | |
577 | ||
578 | DRM_DEBUG_DRIVER("\n"); | |
579 | ||
41a14623 | 580 | edid = drm_get_edid(connector, hdmi->ddc_adapt); |
5402626c BG |
581 | if (!edid) |
582 | goto fail; | |
583 | ||
584 | count = drm_add_edid_modes(connector, edid); | |
585 | drm_mode_connector_update_edid_property(connector, edid); | |
586 | ||
587 | kfree(edid); | |
588 | return count; | |
589 | ||
590 | fail: | |
591 | DRM_ERROR("Can not read HDMI EDID\n"); | |
592 | return 0; | |
593 | } | |
594 | ||
595 | #define CLK_TOLERANCE_HZ 50 | |
596 | ||
597 | static int sti_hdmi_connector_mode_valid(struct drm_connector *connector, | |
598 | struct drm_display_mode *mode) | |
599 | { | |
600 | int target = mode->clock * 1000; | |
601 | int target_min = target - CLK_TOLERANCE_HZ; | |
602 | int target_max = target + CLK_TOLERANCE_HZ; | |
603 | int result; | |
604 | struct sti_hdmi_connector *hdmi_connector | |
605 | = to_sti_hdmi_connector(connector); | |
606 | struct sti_hdmi *hdmi = hdmi_connector->hdmi; | |
607 | ||
608 | ||
609 | result = clk_round_rate(hdmi->clk_pix, target); | |
610 | ||
611 | DRM_DEBUG_DRIVER("target rate = %d => available rate = %d\n", | |
612 | target, result); | |
613 | ||
614 | if ((result < target_min) || (result > target_max)) { | |
615 | DRM_DEBUG_DRIVER("hdmi pixclk=%d not supported\n", target); | |
616 | return MODE_BAD; | |
617 | } | |
618 | ||
619 | return MODE_OK; | |
620 | } | |
621 | ||
622 | struct drm_encoder *sti_hdmi_best_encoder(struct drm_connector *connector) | |
623 | { | |
624 | struct sti_hdmi_connector *hdmi_connector | |
625 | = to_sti_hdmi_connector(connector); | |
626 | ||
627 | /* Best encoder is the one associated during connector creation */ | |
628 | return hdmi_connector->encoder; | |
629 | } | |
630 | ||
631 | static struct drm_connector_helper_funcs sti_hdmi_connector_helper_funcs = { | |
632 | .get_modes = sti_hdmi_connector_get_modes, | |
633 | .mode_valid = sti_hdmi_connector_mode_valid, | |
634 | .best_encoder = sti_hdmi_best_encoder, | |
635 | }; | |
636 | ||
637 | /* get detection status of display device */ | |
638 | static enum drm_connector_status | |
639 | sti_hdmi_connector_detect(struct drm_connector *connector, bool force) | |
640 | { | |
641 | struct sti_hdmi_connector *hdmi_connector | |
642 | = to_sti_hdmi_connector(connector); | |
643 | struct sti_hdmi *hdmi = hdmi_connector->hdmi; | |
644 | ||
645 | DRM_DEBUG_DRIVER("\n"); | |
646 | ||
647 | if (hdmi->hpd) { | |
648 | DRM_DEBUG_DRIVER("hdmi cable connected\n"); | |
649 | return connector_status_connected; | |
650 | } | |
651 | ||
652 | DRM_DEBUG_DRIVER("hdmi cable disconnected\n"); | |
653 | return connector_status_disconnected; | |
654 | } | |
655 | ||
656 | static void sti_hdmi_connector_destroy(struct drm_connector *connector) | |
657 | { | |
658 | struct sti_hdmi_connector *hdmi_connector | |
659 | = to_sti_hdmi_connector(connector); | |
660 | ||
661 | drm_connector_unregister(connector); | |
662 | drm_connector_cleanup(connector); | |
663 | kfree(hdmi_connector); | |
664 | } | |
665 | ||
666 | static struct drm_connector_funcs sti_hdmi_connector_funcs = { | |
de4b00b0 | 667 | .dpms = drm_atomic_helper_connector_dpms, |
5402626c BG |
668 | .fill_modes = drm_helper_probe_single_connector_modes, |
669 | .detect = sti_hdmi_connector_detect, | |
670 | .destroy = sti_hdmi_connector_destroy, | |
de4b00b0 BG |
671 | .reset = drm_atomic_helper_connector_reset, |
672 | .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, | |
673 | .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, | |
5402626c BG |
674 | }; |
675 | ||
676 | static struct drm_encoder *sti_hdmi_find_encoder(struct drm_device *dev) | |
677 | { | |
678 | struct drm_encoder *encoder; | |
679 | ||
680 | list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { | |
681 | if (encoder->encoder_type == DRM_MODE_ENCODER_TMDS) | |
682 | return encoder; | |
683 | } | |
684 | ||
685 | return NULL; | |
686 | } | |
687 | ||
688 | static int sti_hdmi_bind(struct device *dev, struct device *master, void *data) | |
689 | { | |
690 | struct sti_hdmi *hdmi = dev_get_drvdata(dev); | |
691 | struct drm_device *drm_dev = data; | |
692 | struct drm_encoder *encoder; | |
693 | struct sti_hdmi_connector *connector; | |
694 | struct drm_connector *drm_connector; | |
695 | struct drm_bridge *bridge; | |
41a14623 | 696 | struct device_node *ddc; |
5402626c BG |
697 | int err; |
698 | ||
41a14623 BG |
699 | ddc = of_parse_phandle(dev->of_node, "ddc", 0); |
700 | if (ddc) { | |
701 | hdmi->ddc_adapt = of_find_i2c_adapter_by_node(ddc); | |
702 | if (!hdmi->ddc_adapt) { | |
703 | err = -EPROBE_DEFER; | |
704 | of_node_put(ddc); | |
705 | return err; | |
706 | } | |
707 | ||
708 | of_node_put(ddc); | |
709 | } | |
5402626c BG |
710 | |
711 | /* Set the drm device handle */ | |
712 | hdmi->drm_dev = drm_dev; | |
713 | ||
714 | encoder = sti_hdmi_find_encoder(drm_dev); | |
715 | if (!encoder) | |
41a14623 | 716 | goto err_adapt; |
5402626c BG |
717 | |
718 | connector = devm_kzalloc(dev, sizeof(*connector), GFP_KERNEL); | |
719 | if (!connector) | |
41a14623 BG |
720 | goto err_adapt; |
721 | ||
5402626c BG |
722 | |
723 | connector->hdmi = hdmi; | |
724 | ||
725 | bridge = devm_kzalloc(dev, sizeof(*bridge), GFP_KERNEL); | |
726 | if (!bridge) | |
41a14623 | 727 | goto err_adapt; |
5402626c BG |
728 | |
729 | bridge->driver_private = hdmi; | |
b07b90fd | 730 | bridge->funcs = &sti_hdmi_bridge_funcs; |
3d3f8b1f | 731 | drm_bridge_attach(drm_dev, bridge); |
5402626c BG |
732 | |
733 | encoder->bridge = bridge; | |
734 | connector->encoder = encoder; | |
735 | ||
736 | drm_connector = (struct drm_connector *)connector; | |
737 | ||
738 | drm_connector->polled = DRM_CONNECTOR_POLL_HPD; | |
739 | ||
740 | drm_connector_init(drm_dev, drm_connector, | |
741 | &sti_hdmi_connector_funcs, DRM_MODE_CONNECTOR_HDMIA); | |
742 | drm_connector_helper_add(drm_connector, | |
743 | &sti_hdmi_connector_helper_funcs); | |
744 | ||
745 | err = drm_connector_register(drm_connector); | |
746 | if (err) | |
747 | goto err_connector; | |
748 | ||
749 | err = drm_mode_connector_attach_encoder(drm_connector, encoder); | |
750 | if (err) { | |
751 | DRM_ERROR("Failed to attach a connector to a encoder\n"); | |
752 | goto err_sysfs; | |
753 | } | |
754 | ||
755 | /* Enable default interrupts */ | |
756 | hdmi_write(hdmi, HDMI_DEFAULT_INT, HDMI_INT_EN); | |
757 | ||
758 | return 0; | |
759 | ||
760 | err_sysfs: | |
761 | drm_connector_unregister(drm_connector); | |
762 | err_connector: | |
5402626c | 763 | drm_connector_cleanup(drm_connector); |
41a14623 BG |
764 | err_adapt: |
765 | put_device(&hdmi->ddc_adapt->dev); | |
5402626c BG |
766 | return -EINVAL; |
767 | } | |
768 | ||
769 | static void sti_hdmi_unbind(struct device *dev, | |
770 | struct device *master, void *data) | |
771 | { | |
772 | /* do nothing */ | |
773 | } | |
774 | ||
775 | static const struct component_ops sti_hdmi_ops = { | |
776 | .bind = sti_hdmi_bind, | |
777 | .unbind = sti_hdmi_unbind, | |
778 | }; | |
779 | ||
8e932cf0 | 780 | static const struct of_device_id hdmi_of_match[] = { |
5402626c BG |
781 | { |
782 | .compatible = "st,stih416-hdmi", | |
783 | .data = &tx3g0c55phy_ops, | |
784 | }, { | |
785 | .compatible = "st,stih407-hdmi", | |
786 | .data = &tx3g4c28phy_ops, | |
787 | }, { | |
788 | /* end node */ | |
789 | } | |
790 | }; | |
791 | MODULE_DEVICE_TABLE(of, hdmi_of_match); | |
792 | ||
793 | static int sti_hdmi_probe(struct platform_device *pdev) | |
794 | { | |
795 | struct device *dev = &pdev->dev; | |
796 | struct sti_hdmi *hdmi; | |
797 | struct device_node *np = dev->of_node; | |
798 | struct resource *res; | |
799 | int ret; | |
800 | ||
801 | DRM_INFO("%s\n", __func__); | |
802 | ||
803 | hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL); | |
804 | if (!hdmi) | |
805 | return -ENOMEM; | |
806 | ||
807 | hdmi->dev = pdev->dev; | |
808 | ||
809 | /* Get resources */ | |
810 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hdmi-reg"); | |
811 | if (!res) { | |
812 | DRM_ERROR("Invalid hdmi resource\n"); | |
813 | return -ENOMEM; | |
814 | } | |
815 | hdmi->regs = devm_ioremap_nocache(dev, res->start, resource_size(res)); | |
88cfc3fb WY |
816 | if (!hdmi->regs) |
817 | return -ENOMEM; | |
5402626c BG |
818 | |
819 | if (of_device_is_compatible(np, "st,stih416-hdmi")) { | |
820 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, | |
821 | "syscfg"); | |
822 | if (!res) { | |
823 | DRM_ERROR("Invalid syscfg resource\n"); | |
824 | return -ENOMEM; | |
825 | } | |
826 | hdmi->syscfg = devm_ioremap_nocache(dev, res->start, | |
827 | resource_size(res)); | |
88cfc3fb WY |
828 | if (!hdmi->syscfg) |
829 | return -ENOMEM; | |
5402626c BG |
830 | |
831 | } | |
832 | ||
833 | hdmi->phy_ops = (struct hdmi_phy_ops *) | |
834 | of_match_node(hdmi_of_match, np)->data; | |
835 | ||
836 | /* Get clock resources */ | |
837 | hdmi->clk_pix = devm_clk_get(dev, "pix"); | |
838 | if (IS_ERR(hdmi->clk_pix)) { | |
839 | DRM_ERROR("Cannot get hdmi_pix clock\n"); | |
840 | return PTR_ERR(hdmi->clk_pix); | |
841 | } | |
842 | ||
843 | hdmi->clk_tmds = devm_clk_get(dev, "tmds"); | |
844 | if (IS_ERR(hdmi->clk_tmds)) { | |
845 | DRM_ERROR("Cannot get hdmi_tmds clock\n"); | |
846 | return PTR_ERR(hdmi->clk_tmds); | |
847 | } | |
848 | ||
849 | hdmi->clk_phy = devm_clk_get(dev, "phy"); | |
850 | if (IS_ERR(hdmi->clk_phy)) { | |
851 | DRM_ERROR("Cannot get hdmi_phy clock\n"); | |
852 | return PTR_ERR(hdmi->clk_phy); | |
853 | } | |
854 | ||
855 | hdmi->clk_audio = devm_clk_get(dev, "audio"); | |
856 | if (IS_ERR(hdmi->clk_audio)) { | |
857 | DRM_ERROR("Cannot get hdmi_audio clock\n"); | |
858 | return PTR_ERR(hdmi->clk_audio); | |
859 | } | |
860 | ||
76569207 | 861 | hdmi->hpd = readl(hdmi->regs + HDMI_STA) & HDMI_STA_HOT_PLUG; |
5402626c BG |
862 | |
863 | init_waitqueue_head(&hdmi->wait_event); | |
864 | ||
865 | hdmi->irq = platform_get_irq_byname(pdev, "irq"); | |
866 | ||
867 | ret = devm_request_threaded_irq(dev, hdmi->irq, hdmi_irq, | |
868 | hdmi_irq_thread, IRQF_ONESHOT, dev_name(dev), hdmi); | |
869 | if (ret) { | |
870 | DRM_ERROR("Failed to register HDMI interrupt\n"); | |
871 | return ret; | |
872 | } | |
873 | ||
874 | hdmi->reset = devm_reset_control_get(dev, "hdmi"); | |
875 | /* Take hdmi out of reset */ | |
876 | if (!IS_ERR(hdmi->reset)) | |
877 | reset_control_deassert(hdmi->reset); | |
878 | ||
879 | platform_set_drvdata(pdev, hdmi); | |
880 | ||
881 | return component_add(&pdev->dev, &sti_hdmi_ops); | |
882 | } | |
883 | ||
884 | static int sti_hdmi_remove(struct platform_device *pdev) | |
885 | { | |
41a14623 BG |
886 | struct sti_hdmi *hdmi = dev_get_drvdata(&pdev->dev); |
887 | ||
888 | if (hdmi->ddc_adapt) | |
889 | put_device(&hdmi->ddc_adapt->dev); | |
890 | ||
5402626c BG |
891 | component_del(&pdev->dev, &sti_hdmi_ops); |
892 | return 0; | |
893 | } | |
894 | ||
895 | struct platform_driver sti_hdmi_driver = { | |
896 | .driver = { | |
897 | .name = "sti-hdmi", | |
898 | .owner = THIS_MODULE, | |
899 | .of_match_table = hdmi_of_match, | |
900 | }, | |
901 | .probe = sti_hdmi_probe, | |
902 | .remove = sti_hdmi_remove, | |
903 | }; | |
904 | ||
905 | module_platform_driver(sti_hdmi_driver); | |
906 | ||
907 | MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>"); | |
908 | MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver"); | |
909 | MODULE_LICENSE("GPL"); |