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1/*
2 * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
3 * Zheng Yang <zhengyang@rock-chips.com>
4 * Yakir Yang <ykk@rock-chips.com>
5 *
6 * This software is licensed under the terms of the GNU General Public
7 * License version 2, as published by the Free Software Foundation, and
8 * may be copied, distributed, and modified under those terms.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 */
15
16#include <linux/irq.h>
17#include <linux/clk.h>
18#include <linux/delay.h>
19#include <linux/err.h>
20#include <linux/hdmi.h>
21#include <linux/mfd/syscon.h>
22#include <linux/module.h>
23#include <linux/mutex.h>
24#include <linux/of_device.h>
25
26#include <drm/drm_of.h>
27#include <drm/drmP.h>
28#include <drm/drm_atomic_helper.h>
29#include <drm/drm_crtc_helper.h>
30#include <drm/drm_edid.h>
31
32#include "rockchip_drm_drv.h"
33#include "rockchip_drm_vop.h"
34
35#include "inno_hdmi.h"
36
37#define to_inno_hdmi(x) container_of(x, struct inno_hdmi, x)
38
39struct hdmi_data_info {
40 int vic;
41 bool sink_is_hdmi;
42 bool sink_has_audio;
43 unsigned int enc_in_format;
44 unsigned int enc_out_format;
45 unsigned int colorimetry;
46};
47
48struct inno_hdmi_i2c {
49 struct i2c_adapter adap;
50
51 u8 ddc_addr;
52 u8 segment_addr;
53
54 struct mutex lock;
55 struct completion cmp;
56};
57
58struct inno_hdmi {
59 struct device *dev;
60 struct drm_device *drm_dev;
61
62 int irq;
63 struct clk *pclk;
64 void __iomem *regs;
65
66 struct drm_connector connector;
67 struct drm_encoder encoder;
68
69 struct inno_hdmi_i2c *i2c;
70 struct i2c_adapter *ddc;
71
72 unsigned int tmds_rate;
73
74 struct hdmi_data_info hdmi_data;
75 struct drm_display_mode previous_mode;
76};
77
78enum {
79 CSC_ITU601_16_235_TO_RGB_0_255_8BIT,
80 CSC_ITU601_0_255_TO_RGB_0_255_8BIT,
81 CSC_ITU709_16_235_TO_RGB_0_255_8BIT,
82 CSC_RGB_0_255_TO_ITU601_16_235_8BIT,
83 CSC_RGB_0_255_TO_ITU709_16_235_8BIT,
84 CSC_RGB_0_255_TO_RGB_16_235_8BIT,
85};
86
87static const char coeff_csc[][24] = {
88 /*
89 * YUV2RGB:601 SD mode(Y[16:235], UV[16:240], RGB[0:255]):
90 * R = 1.164*Y + 1.596*V - 204
91 * G = 1.164*Y - 0.391*U - 0.813*V + 154
92 * B = 1.164*Y + 2.018*U - 258
93 */
94 {
95 0x04, 0xa7, 0x00, 0x00, 0x06, 0x62, 0x02, 0xcc,
96 0x04, 0xa7, 0x11, 0x90, 0x13, 0x40, 0x00, 0x9a,
97 0x04, 0xa7, 0x08, 0x12, 0x00, 0x00, 0x03, 0x02
98 },
99 /*
100 * YUV2RGB:601 SD mode(YUV[0:255],RGB[0:255]):
101 * R = Y + 1.402*V - 248
102 * G = Y - 0.344*U - 0.714*V + 135
103 * B = Y + 1.772*U - 227
104 */
105 {
106 0x04, 0x00, 0x00, 0x00, 0x05, 0x9b, 0x02, 0xf8,
107 0x04, 0x00, 0x11, 0x60, 0x12, 0xdb, 0x00, 0x87,
108 0x04, 0x00, 0x07, 0x16, 0x00, 0x00, 0x02, 0xe3
109 },
110 /*
111 * YUV2RGB:709 HD mode(Y[16:235],UV[16:240],RGB[0:255]):
112 * R = 1.164*Y + 1.793*V - 248
113 * G = 1.164*Y - 0.213*U - 0.534*V + 77
114 * B = 1.164*Y + 2.115*U - 289
115 */
116 {
117 0x04, 0xa7, 0x00, 0x00, 0x07, 0x2c, 0x02, 0xf8,
118 0x04, 0xa7, 0x10, 0xda, 0x12, 0x22, 0x00, 0x4d,
119 0x04, 0xa7, 0x08, 0x74, 0x00, 0x00, 0x03, 0x21
120 },
121
122 /*
123 * RGB2YUV:601 SD mode:
124 * Cb = -0.291G - 0.148R + 0.439B + 128
125 * Y = 0.504G + 0.257R + 0.098B + 16
126 * Cr = -0.368G + 0.439R - 0.071B + 128
127 */
128 {
129 0x11, 0x5f, 0x01, 0x82, 0x10, 0x23, 0x00, 0x80,
130 0x02, 0x1c, 0x00, 0xa1, 0x00, 0x36, 0x00, 0x1e,
131 0x11, 0x29, 0x10, 0x59, 0x01, 0x82, 0x00, 0x80
132 },
133 /*
134 * RGB2YUV:709 HD mode:
135 * Cb = - 0.338G - 0.101R + 0.439B + 128
136 * Y = 0.614G + 0.183R + 0.062B + 16
137 * Cr = - 0.399G + 0.439R - 0.040B + 128
138 */
139 {
140 0x11, 0x98, 0x01, 0xc1, 0x10, 0x28, 0x00, 0x80,
141 0x02, 0x74, 0x00, 0xbb, 0x00, 0x3f, 0x00, 0x10,
142 0x11, 0x5a, 0x10, 0x67, 0x01, 0xc1, 0x00, 0x80
143 },
144 /*
145 * RGB[0:255]2RGB[16:235]:
146 * R' = R x (235-16)/255 + 16;
147 * G' = G x (235-16)/255 + 16;
148 * B' = B x (235-16)/255 + 16;
149 */
150 {
151 0x00, 0x00, 0x03, 0x6F, 0x00, 0x00, 0x00, 0x10,
152 0x03, 0x6F, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10,
153 0x00, 0x00, 0x00, 0x00, 0x03, 0x6F, 0x00, 0x10
154 },
155};
156
157static inline u8 hdmi_readb(struct inno_hdmi *hdmi, u16 offset)
158{
159 return readl_relaxed(hdmi->regs + (offset) * 0x04);
160}
161
162static inline void hdmi_writeb(struct inno_hdmi *hdmi, u16 offset, u32 val)
163{
164 writel_relaxed(val, hdmi->regs + (offset) * 0x04);
165}
166
167static inline void hdmi_modb(struct inno_hdmi *hdmi, u16 offset,
168 u32 msk, u32 val)
169{
170 u8 temp = hdmi_readb(hdmi, offset) & ~msk;
171
172 temp |= val & msk;
173 hdmi_writeb(hdmi, offset, temp);
174}
175
176static void inno_hdmi_i2c_init(struct inno_hdmi *hdmi)
177{
178 int ddc_bus_freq;
179
180 ddc_bus_freq = (hdmi->tmds_rate >> 2) / HDMI_SCL_RATE;
181
182 hdmi_writeb(hdmi, DDC_BUS_FREQ_L, ddc_bus_freq & 0xFF);
183 hdmi_writeb(hdmi, DDC_BUS_FREQ_H, (ddc_bus_freq >> 8) & 0xFF);
184
185 /* Clear the EDID interrupt flag and mute the interrupt */
186 hdmi_writeb(hdmi, HDMI_INTERRUPT_MASK1, 0);
187 hdmi_writeb(hdmi, HDMI_INTERRUPT_STATUS1, m_INT_EDID_READY);
188}
189
190static void inno_hdmi_sys_power(struct inno_hdmi *hdmi, bool enable)
191{
192 if (enable)
193 hdmi_modb(hdmi, HDMI_SYS_CTRL, m_POWER, v_PWR_ON);
194 else
195 hdmi_modb(hdmi, HDMI_SYS_CTRL, m_POWER, v_PWR_OFF);
196}
197
198static void inno_hdmi_set_pwr_mode(struct inno_hdmi *hdmi, int mode)
199{
200 switch (mode) {
201 case NORMAL:
202 inno_hdmi_sys_power(hdmi, false);
203
204 hdmi_writeb(hdmi, HDMI_PHY_PRE_EMPHASIS, 0x6f);
205 hdmi_writeb(hdmi, HDMI_PHY_DRIVER, 0xbb);
206
207 hdmi_writeb(hdmi, HDMI_PHY_SYS_CTL, 0x15);
208 hdmi_writeb(hdmi, HDMI_PHY_SYS_CTL, 0x14);
209 hdmi_writeb(hdmi, HDMI_PHY_SYS_CTL, 0x10);
210 hdmi_writeb(hdmi, HDMI_PHY_CHG_PWR, 0x0f);
211 hdmi_writeb(hdmi, HDMI_PHY_SYNC, 0x00);
212 hdmi_writeb(hdmi, HDMI_PHY_SYNC, 0x01);
213
214 inno_hdmi_sys_power(hdmi, true);
215 break;
216
217 case LOWER_PWR:
218 inno_hdmi_sys_power(hdmi, false);
219 hdmi_writeb(hdmi, HDMI_PHY_DRIVER, 0x00);
220 hdmi_writeb(hdmi, HDMI_PHY_PRE_EMPHASIS, 0x00);
221 hdmi_writeb(hdmi, HDMI_PHY_CHG_PWR, 0x00);
222 hdmi_writeb(hdmi, HDMI_PHY_SYS_CTL, 0x15);
223
224 break;
225
226 default:
227 DRM_DEV_ERROR(hdmi->dev, "Unknown power mode %d\n", mode);
228 }
229}
230
231static void inno_hdmi_reset(struct inno_hdmi *hdmi)
232{
233 u32 val;
234 u32 msk;
235
236 hdmi_modb(hdmi, HDMI_SYS_CTRL, m_RST_DIGITAL, v_NOT_RST_DIGITAL);
237 udelay(100);
238
239 hdmi_modb(hdmi, HDMI_SYS_CTRL, m_RST_ANALOG, v_NOT_RST_ANALOG);
240 udelay(100);
241
242 msk = m_REG_CLK_INV | m_REG_CLK_SOURCE | m_POWER | m_INT_POL;
243 val = v_REG_CLK_INV | v_REG_CLK_SOURCE_SYS | v_PWR_ON | v_INT_POL_HIGH;
244 hdmi_modb(hdmi, HDMI_SYS_CTRL, msk, val);
245
246 inno_hdmi_set_pwr_mode(hdmi, NORMAL);
247}
248
249static int inno_hdmi_upload_frame(struct inno_hdmi *hdmi, int setup_rc,
250 union hdmi_infoframe *frame, u32 frame_index,
251 u32 mask, u32 disable, u32 enable)
252{
253 if (mask)
254 hdmi_modb(hdmi, HDMI_PACKET_SEND_AUTO, mask, disable);
255
256 hdmi_writeb(hdmi, HDMI_CONTROL_PACKET_BUF_INDEX, frame_index);
257
258 if (setup_rc >= 0) {
259 u8 packed_frame[HDMI_MAXIMUM_INFO_FRAME_SIZE];
260 ssize_t rc, i;
261
262 rc = hdmi_infoframe_pack(frame, packed_frame,
263 sizeof(packed_frame));
264 if (rc < 0)
265 return rc;
266
267 for (i = 0; i < rc; i++)
268 hdmi_writeb(hdmi, HDMI_CONTROL_PACKET_ADDR + i,
269 packed_frame[i]);
270
271 if (mask)
272 hdmi_modb(hdmi, HDMI_PACKET_SEND_AUTO, mask, enable);
273 }
274
275 return setup_rc;
276}
277
278static int inno_hdmi_config_video_vsi(struct inno_hdmi *hdmi,
279 struct drm_display_mode *mode)
280{
281 union hdmi_infoframe frame;
282 int rc;
283
284 rc = drm_hdmi_vendor_infoframe_from_display_mode(&frame.vendor.hdmi,
285 &hdmi->connector,
286 mode);
287
288 return inno_hdmi_upload_frame(hdmi, rc, &frame, INFOFRAME_VSI,
289 m_PACKET_VSI_EN, v_PACKET_VSI_EN(0), v_PACKET_VSI_EN(1));
290}
291
292static int inno_hdmi_config_video_avi(struct inno_hdmi *hdmi,
293 struct drm_display_mode *mode)
294{
295 union hdmi_infoframe frame;
296 int rc;
297
298 rc = drm_hdmi_avi_infoframe_from_display_mode(&frame.avi, mode, false);
299
300 if (hdmi->hdmi_data.enc_out_format == HDMI_COLORSPACE_YUV444)
301 frame.avi.colorspace = HDMI_COLORSPACE_YUV444;
302 else if (hdmi->hdmi_data.enc_out_format == HDMI_COLORSPACE_YUV422)
303 frame.avi.colorspace = HDMI_COLORSPACE_YUV422;
304 else
305 frame.avi.colorspace = HDMI_COLORSPACE_RGB;
306
307 return inno_hdmi_upload_frame(hdmi, rc, &frame, INFOFRAME_AVI, 0, 0, 0);
308}
309
310static int inno_hdmi_config_video_csc(struct inno_hdmi *hdmi)
311{
312 struct hdmi_data_info *data = &hdmi->hdmi_data;
313 int c0_c2_change = 0;
314 int csc_enable = 0;
315 int csc_mode = 0;
316 int auto_csc = 0;
317 int value;
318 int i;
319
320 /* Input video mode is SDR RGB24bit, data enable signal from external */
321 hdmi_writeb(hdmi, HDMI_VIDEO_CONTRL1, v_DE_EXTERNAL |
322 v_VIDEO_INPUT_FORMAT(VIDEO_INPUT_SDR_RGB444));
323
324 /* Input color hardcode to RGB, and output color hardcode to RGB888 */
325 value = v_VIDEO_INPUT_BITS(VIDEO_INPUT_8BITS) |
326 v_VIDEO_OUTPUT_COLOR(0) |
327 v_VIDEO_INPUT_CSP(0);
328 hdmi_writeb(hdmi, HDMI_VIDEO_CONTRL2, value);
329
330 if (data->enc_in_format == data->enc_out_format) {
331 if ((data->enc_in_format == HDMI_COLORSPACE_RGB) ||
332 (data->enc_in_format >= HDMI_COLORSPACE_YUV444)) {
333 value = v_SOF_DISABLE | v_COLOR_DEPTH_NOT_INDICATED(1);
334 hdmi_writeb(hdmi, HDMI_VIDEO_CONTRL3, value);
335
336 hdmi_modb(hdmi, HDMI_VIDEO_CONTRL,
337 m_VIDEO_AUTO_CSC | m_VIDEO_C0_C2_SWAP,
338 v_VIDEO_AUTO_CSC(AUTO_CSC_DISABLE) |
339 v_VIDEO_C0_C2_SWAP(C0_C2_CHANGE_DISABLE));
340 return 0;
341 }
342 }
343
344 if (data->colorimetry == HDMI_COLORIMETRY_ITU_601) {
345 if ((data->enc_in_format == HDMI_COLORSPACE_RGB) &&
346 (data->enc_out_format == HDMI_COLORSPACE_YUV444)) {
347 csc_mode = CSC_RGB_0_255_TO_ITU601_16_235_8BIT;
348 auto_csc = AUTO_CSC_DISABLE;
349 c0_c2_change = C0_C2_CHANGE_DISABLE;
350 csc_enable = v_CSC_ENABLE;
351 } else if ((data->enc_in_format == HDMI_COLORSPACE_YUV444) &&
352 (data->enc_out_format == HDMI_COLORSPACE_RGB)) {
353 csc_mode = CSC_ITU601_16_235_TO_RGB_0_255_8BIT;
354 auto_csc = AUTO_CSC_ENABLE;
355 c0_c2_change = C0_C2_CHANGE_DISABLE;
356 csc_enable = v_CSC_DISABLE;
357 }
358 } else {
359 if ((data->enc_in_format == HDMI_COLORSPACE_RGB) &&
360 (data->enc_out_format == HDMI_COLORSPACE_YUV444)) {
361 csc_mode = CSC_RGB_0_255_TO_ITU709_16_235_8BIT;
362 auto_csc = AUTO_CSC_DISABLE;
363 c0_c2_change = C0_C2_CHANGE_DISABLE;
364 csc_enable = v_CSC_ENABLE;
365 } else if ((data->enc_in_format == HDMI_COLORSPACE_YUV444) &&
366 (data->enc_out_format == HDMI_COLORSPACE_RGB)) {
367 csc_mode = CSC_ITU709_16_235_TO_RGB_0_255_8BIT;
368 auto_csc = AUTO_CSC_ENABLE;
369 c0_c2_change = C0_C2_CHANGE_DISABLE;
370 csc_enable = v_CSC_DISABLE;
371 }
372 }
373
374 for (i = 0; i < 24; i++)
375 hdmi_writeb(hdmi, HDMI_VIDEO_CSC_COEF + i,
376 coeff_csc[csc_mode][i]);
377
378 value = v_SOF_DISABLE | csc_enable | v_COLOR_DEPTH_NOT_INDICATED(1);
379 hdmi_writeb(hdmi, HDMI_VIDEO_CONTRL3, value);
380 hdmi_modb(hdmi, HDMI_VIDEO_CONTRL, m_VIDEO_AUTO_CSC |
381 m_VIDEO_C0_C2_SWAP, v_VIDEO_AUTO_CSC(auto_csc) |
382 v_VIDEO_C0_C2_SWAP(c0_c2_change));
383
384 return 0;
385}
386
387static int inno_hdmi_config_video_timing(struct inno_hdmi *hdmi,
388 struct drm_display_mode *mode)
389{
390 int value;
391
392 /* Set detail external video timing polarity and interlace mode */
393 value = v_EXTERANL_VIDEO(1);
394 value |= mode->flags & DRM_MODE_FLAG_PHSYNC ?
395 v_HSYNC_POLARITY(1) : v_HSYNC_POLARITY(0);
396 value |= mode->flags & DRM_MODE_FLAG_PVSYNC ?
397 v_VSYNC_POLARITY(1) : v_VSYNC_POLARITY(0);
398 value |= mode->flags & DRM_MODE_FLAG_INTERLACE ?
399 v_INETLACE(1) : v_INETLACE(0);
400 hdmi_writeb(hdmi, HDMI_VIDEO_TIMING_CTL, value);
401
402 /* Set detail external video timing */
403 value = mode->htotal;
404 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HTOTAL_L, value & 0xFF);
405 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HTOTAL_H, (value >> 8) & 0xFF);
406
407 value = mode->htotal - mode->hdisplay;
408 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HBLANK_L, value & 0xFF);
409 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HBLANK_H, (value >> 8) & 0xFF);
410
411 value = mode->hsync_start - mode->hdisplay;
412 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HDELAY_L, value & 0xFF);
413 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HDELAY_H, (value >> 8) & 0xFF);
414
415 value = mode->hsync_end - mode->hsync_start;
416 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HDURATION_L, value & 0xFF);
417 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HDURATION_H, (value >> 8) & 0xFF);
418
419 value = mode->vtotal;
420 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_VTOTAL_L, value & 0xFF);
421 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_VTOTAL_H, (value >> 8) & 0xFF);
422
423 value = mode->vtotal - mode->vdisplay;
424 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_VBLANK, value & 0xFF);
425
426 value = mode->vsync_start - mode->vdisplay;
427 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_VDELAY, value & 0xFF);
428
429 value = mode->vsync_end - mode->vsync_start;
430 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_VDURATION, value & 0xFF);
431
432 hdmi_writeb(hdmi, HDMI_PHY_PRE_DIV_RATIO, 0x1e);
433 hdmi_writeb(hdmi, HDMI_PHY_FEEDBACK_DIV_RATIO_LOW, 0x2c);
434 hdmi_writeb(hdmi, HDMI_PHY_FEEDBACK_DIV_RATIO_HIGH, 0x01);
435
436 return 0;
437}
438
439static int inno_hdmi_setup(struct inno_hdmi *hdmi,
440 struct drm_display_mode *mode)
441{
442 hdmi->hdmi_data.vic = drm_match_cea_mode(mode);
443
444 hdmi->hdmi_data.enc_in_format = HDMI_COLORSPACE_RGB;
445 hdmi->hdmi_data.enc_out_format = HDMI_COLORSPACE_RGB;
446
447 if ((hdmi->hdmi_data.vic == 6) || (hdmi->hdmi_data.vic == 7) ||
448 (hdmi->hdmi_data.vic == 21) || (hdmi->hdmi_data.vic == 22) ||
449 (hdmi->hdmi_data.vic == 2) || (hdmi->hdmi_data.vic == 3) ||
450 (hdmi->hdmi_data.vic == 17) || (hdmi->hdmi_data.vic == 18))
451 hdmi->hdmi_data.colorimetry = HDMI_COLORIMETRY_ITU_601;
452 else
453 hdmi->hdmi_data.colorimetry = HDMI_COLORIMETRY_ITU_709;
454
455 /* Mute video and audio output */
456 hdmi_modb(hdmi, HDMI_AV_MUTE, m_AUDIO_MUTE | m_VIDEO_BLACK,
457 v_AUDIO_MUTE(1) | v_VIDEO_MUTE(1));
458
459 /* Set HDMI Mode */
460 hdmi_writeb(hdmi, HDMI_HDCP_CTRL,
461 v_HDMI_DVI(hdmi->hdmi_data.sink_is_hdmi));
462
463 inno_hdmi_config_video_timing(hdmi, mode);
464
465 inno_hdmi_config_video_csc(hdmi);
466
467 if (hdmi->hdmi_data.sink_is_hdmi) {
468 inno_hdmi_config_video_avi(hdmi, mode);
469 inno_hdmi_config_video_vsi(hdmi, mode);
470 }
471
472 /*
473 * When IP controller have configured to an accurate video
474 * timing, then the TMDS clock source would be switched to
475 * DCLK_LCDC, so we need to init the TMDS rate to mode pixel
476 * clock rate, and reconfigure the DDC clock.
477 */
478 hdmi->tmds_rate = mode->clock * 1000;
479 inno_hdmi_i2c_init(hdmi);
480
481 /* Unmute video and audio output */
482 hdmi_modb(hdmi, HDMI_AV_MUTE, m_AUDIO_MUTE | m_VIDEO_BLACK,
483 v_AUDIO_MUTE(0) | v_VIDEO_MUTE(0));
484
485 return 0;
486}
487
488static void inno_hdmi_encoder_mode_set(struct drm_encoder *encoder,
489 struct drm_display_mode *mode,
490 struct drm_display_mode *adj_mode)
491{
492 struct inno_hdmi *hdmi = to_inno_hdmi(encoder);
493
494 inno_hdmi_setup(hdmi, adj_mode);
495
496 /* Store the display mode for plugin/DPMS poweron events */
497 memcpy(&hdmi->previous_mode, adj_mode, sizeof(hdmi->previous_mode));
498}
499
500static void inno_hdmi_encoder_enable(struct drm_encoder *encoder)
501{
502 struct inno_hdmi *hdmi = to_inno_hdmi(encoder);
503
504 inno_hdmi_set_pwr_mode(hdmi, NORMAL);
505}
506
507static void inno_hdmi_encoder_disable(struct drm_encoder *encoder)
508{
509 struct inno_hdmi *hdmi = to_inno_hdmi(encoder);
510
511 inno_hdmi_set_pwr_mode(hdmi, LOWER_PWR);
512}
513
514static bool inno_hdmi_encoder_mode_fixup(struct drm_encoder *encoder,
515 const struct drm_display_mode *mode,
516 struct drm_display_mode *adj_mode)
517{
518 return true;
519}
520
521static int
522inno_hdmi_encoder_atomic_check(struct drm_encoder *encoder,
523 struct drm_crtc_state *crtc_state,
524 struct drm_connector_state *conn_state)
525{
526 struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
527
528 s->output_mode = ROCKCHIP_OUT_MODE_P888;
529 s->output_type = DRM_MODE_CONNECTOR_HDMIA;
530
531 return 0;
532}
533
534static struct drm_encoder_helper_funcs inno_hdmi_encoder_helper_funcs = {
535 .enable = inno_hdmi_encoder_enable,
536 .disable = inno_hdmi_encoder_disable,
537 .mode_fixup = inno_hdmi_encoder_mode_fixup,
538 .mode_set = inno_hdmi_encoder_mode_set,
539 .atomic_check = inno_hdmi_encoder_atomic_check,
540};
541
542static struct drm_encoder_funcs inno_hdmi_encoder_funcs = {
543 .destroy = drm_encoder_cleanup,
544};
545
546static enum drm_connector_status
547inno_hdmi_connector_detect(struct drm_connector *connector, bool force)
548{
549 struct inno_hdmi *hdmi = to_inno_hdmi(connector);
550
551 return (hdmi_readb(hdmi, HDMI_STATUS) & m_HOTPLUG) ?
552 connector_status_connected : connector_status_disconnected;
553}
554
555static int inno_hdmi_connector_get_modes(struct drm_connector *connector)
556{
557 struct inno_hdmi *hdmi = to_inno_hdmi(connector);
558 struct edid *edid;
559 int ret = 0;
560
561 if (!hdmi->ddc)
562 return 0;
563
564 edid = drm_get_edid(connector, hdmi->ddc);
565 if (edid) {
566 hdmi->hdmi_data.sink_is_hdmi = drm_detect_hdmi_monitor(edid);
567 hdmi->hdmi_data.sink_has_audio = drm_detect_monitor_audio(edid);
568 drm_mode_connector_update_edid_property(connector, edid);
569 ret = drm_add_edid_modes(connector, edid);
570 kfree(edid);
571 }
572
573 return ret;
574}
575
576static enum drm_mode_status
577inno_hdmi_connector_mode_valid(struct drm_connector *connector,
578 struct drm_display_mode *mode)
579{
580 return MODE_OK;
581}
582
583static int
584inno_hdmi_probe_single_connector_modes(struct drm_connector *connector,
585 uint32_t maxX, uint32_t maxY)
586{
587 return drm_helper_probe_single_connector_modes(connector, 1920, 1080);
588}
589
590static void inno_hdmi_connector_destroy(struct drm_connector *connector)
591{
592 drm_connector_unregister(connector);
593 drm_connector_cleanup(connector);
594}
595
596static const struct drm_connector_funcs inno_hdmi_connector_funcs = {
597 .fill_modes = inno_hdmi_probe_single_connector_modes,
598 .detect = inno_hdmi_connector_detect,
599 .destroy = inno_hdmi_connector_destroy,
600 .reset = drm_atomic_helper_connector_reset,
601 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
602 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
603};
604
605static struct drm_connector_helper_funcs inno_hdmi_connector_helper_funcs = {
606 .get_modes = inno_hdmi_connector_get_modes,
607 .mode_valid = inno_hdmi_connector_mode_valid,
608};
609
610static int inno_hdmi_register(struct drm_device *drm, struct inno_hdmi *hdmi)
611{
612 struct drm_encoder *encoder = &hdmi->encoder;
613 struct device *dev = hdmi->dev;
614
615 encoder->possible_crtcs = drm_of_find_possible_crtcs(drm, dev->of_node);
616
617 /*
618 * If we failed to find the CRTC(s) which this encoder is
619 * supposed to be connected to, it's because the CRTC has
620 * not been registered yet. Defer probing, and hope that
621 * the required CRTC is added later.
622 */
623 if (encoder->possible_crtcs == 0)
624 return -EPROBE_DEFER;
625
626 drm_encoder_helper_add(encoder, &inno_hdmi_encoder_helper_funcs);
627 drm_encoder_init(drm, encoder, &inno_hdmi_encoder_funcs,
628 DRM_MODE_ENCODER_TMDS, NULL);
629
630 hdmi->connector.polled = DRM_CONNECTOR_POLL_HPD;
631
632 drm_connector_helper_add(&hdmi->connector,
633 &inno_hdmi_connector_helper_funcs);
634 drm_connector_init(drm, &hdmi->connector, &inno_hdmi_connector_funcs,
635 DRM_MODE_CONNECTOR_HDMIA);
636
637 drm_mode_connector_attach_encoder(&hdmi->connector, encoder);
638
639 return 0;
640}
641
642static irqreturn_t inno_hdmi_i2c_irq(struct inno_hdmi *hdmi)
643{
644 struct inno_hdmi_i2c *i2c = hdmi->i2c;
645 u8 stat;
646
647 stat = hdmi_readb(hdmi, HDMI_INTERRUPT_STATUS1);
648 if (!(stat & m_INT_EDID_READY))
649 return IRQ_NONE;
650
651 /* Clear HDMI EDID interrupt flag */
652 hdmi_writeb(hdmi, HDMI_INTERRUPT_STATUS1, m_INT_EDID_READY);
653
654 complete(&i2c->cmp);
655
656 return IRQ_HANDLED;
657}
658
659static irqreturn_t inno_hdmi_hardirq(int irq, void *dev_id)
660{
661 struct inno_hdmi *hdmi = dev_id;
662 irqreturn_t ret = IRQ_NONE;
663 u8 interrupt;
664
665 if (hdmi->i2c)
666 ret = inno_hdmi_i2c_irq(hdmi);
667
668 interrupt = hdmi_readb(hdmi, HDMI_STATUS);
669 if (interrupt & m_INT_HOTPLUG) {
670 hdmi_modb(hdmi, HDMI_STATUS, m_INT_HOTPLUG, m_INT_HOTPLUG);
671 ret = IRQ_WAKE_THREAD;
672 }
673
674 return ret;
675}
676
677static irqreturn_t inno_hdmi_irq(int irq, void *dev_id)
678{
679 struct inno_hdmi *hdmi = dev_id;
680
681 drm_helper_hpd_irq_event(hdmi->connector.dev);
682
683 return IRQ_HANDLED;
684}
685
686static int inno_hdmi_i2c_read(struct inno_hdmi *hdmi, struct i2c_msg *msgs)
687{
688 int length = msgs->len;
689 u8 *buf = msgs->buf;
690 int ret;
691
692 ret = wait_for_completion_timeout(&hdmi->i2c->cmp, HZ / 10);
693 if (!ret)
694 return -EAGAIN;
695
696 while (length--)
697 *buf++ = hdmi_readb(hdmi, HDMI_EDID_FIFO_ADDR);
698
699 return 0;
700}
701
702static int inno_hdmi_i2c_write(struct inno_hdmi *hdmi, struct i2c_msg *msgs)
703{
704 /*
705 * The DDC module only support read EDID message, so
706 * we assume that each word write to this i2c adapter
707 * should be the offset of EDID word address.
708 */
709 if ((msgs->len != 1) ||
710 ((msgs->addr != DDC_ADDR) && (msgs->addr != DDC_SEGMENT_ADDR)))
711 return -EINVAL;
712
713 reinit_completion(&hdmi->i2c->cmp);
714
715 if (msgs->addr == DDC_SEGMENT_ADDR)
716 hdmi->i2c->segment_addr = msgs->buf[0];
717 if (msgs->addr == DDC_ADDR)
718 hdmi->i2c->ddc_addr = msgs->buf[0];
719
720 /* Set edid fifo first addr */
721 hdmi_writeb(hdmi, HDMI_EDID_FIFO_OFFSET, 0x00);
722
723 /* Set edid word address 0x00/0x80 */
724 hdmi_writeb(hdmi, HDMI_EDID_WORD_ADDR, hdmi->i2c->ddc_addr);
725
726 /* Set edid segment pointer */
727 hdmi_writeb(hdmi, HDMI_EDID_SEGMENT_POINTER, hdmi->i2c->segment_addr);
728
729 return 0;
730}
731
732static int inno_hdmi_i2c_xfer(struct i2c_adapter *adap,
733 struct i2c_msg *msgs, int num)
734{
735 struct inno_hdmi *hdmi = i2c_get_adapdata(adap);
736 struct inno_hdmi_i2c *i2c = hdmi->i2c;
737 int i, ret = 0;
738
739 mutex_lock(&i2c->lock);
740
741 /* Clear the EDID interrupt flag and unmute the interrupt */
742 hdmi_writeb(hdmi, HDMI_INTERRUPT_MASK1, m_INT_EDID_READY);
743 hdmi_writeb(hdmi, HDMI_INTERRUPT_STATUS1, m_INT_EDID_READY);
744
745 for (i = 0; i < num; i++) {
746 DRM_DEV_DEBUG(hdmi->dev,
747 "xfer: num: %d/%d, len: %d, flags: %#x\n",
748 i + 1, num, msgs[i].len, msgs[i].flags);
749
750 if (msgs[i].flags & I2C_M_RD)
751 ret = inno_hdmi_i2c_read(hdmi, &msgs[i]);
752 else
753 ret = inno_hdmi_i2c_write(hdmi, &msgs[i]);
754
755 if (ret < 0)
756 break;
757 }
758
759 if (!ret)
760 ret = num;
761
762 /* Mute HDMI EDID interrupt */
763 hdmi_writeb(hdmi, HDMI_INTERRUPT_MASK1, 0);
764
765 mutex_unlock(&i2c->lock);
766
767 return ret;
768}
769
770static u32 inno_hdmi_i2c_func(struct i2c_adapter *adapter)
771{
772 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
773}
774
775static const struct i2c_algorithm inno_hdmi_algorithm = {
776 .master_xfer = inno_hdmi_i2c_xfer,
777 .functionality = inno_hdmi_i2c_func,
778};
779
780static struct i2c_adapter *inno_hdmi_i2c_adapter(struct inno_hdmi *hdmi)
781{
782 struct i2c_adapter *adap;
783 struct inno_hdmi_i2c *i2c;
784 int ret;
785
786 i2c = devm_kzalloc(hdmi->dev, sizeof(*i2c), GFP_KERNEL);
787 if (!i2c)
788 return ERR_PTR(-ENOMEM);
789
790 mutex_init(&i2c->lock);
791 init_completion(&i2c->cmp);
792
793 adap = &i2c->adap;
794 adap->class = I2C_CLASS_DDC;
795 adap->owner = THIS_MODULE;
796 adap->dev.parent = hdmi->dev;
797 adap->dev.of_node = hdmi->dev->of_node;
798 adap->algo = &inno_hdmi_algorithm;
799 strlcpy(adap->name, "Inno HDMI", sizeof(adap->name));
800 i2c_set_adapdata(adap, hdmi);
801
802 ret = i2c_add_adapter(adap);
803 if (ret) {
804 dev_warn(hdmi->dev, "cannot add %s I2C adapter\n", adap->name);
805 devm_kfree(hdmi->dev, i2c);
806 return ERR_PTR(ret);
807 }
808
809 hdmi->i2c = i2c;
810
811 DRM_DEV_INFO(hdmi->dev, "registered %s I2C bus driver\n", adap->name);
812
813 return adap;
814}
815
816static int inno_hdmi_bind(struct device *dev, struct device *master,
817 void *data)
818{
819 struct platform_device *pdev = to_platform_device(dev);
820 struct drm_device *drm = data;
821 struct inno_hdmi *hdmi;
822 struct resource *iores;
823 int irq;
824 int ret;
825
826 hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL);
827 if (!hdmi)
828 return -ENOMEM;
829
830 hdmi->dev = dev;
831 hdmi->drm_dev = drm;
832
833 iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
834 hdmi->regs = devm_ioremap_resource(dev, iores);
835 if (IS_ERR(hdmi->regs))
836 return PTR_ERR(hdmi->regs);
837
838 hdmi->pclk = devm_clk_get(hdmi->dev, "pclk");
839 if (IS_ERR(hdmi->pclk)) {
840 DRM_DEV_ERROR(hdmi->dev, "Unable to get HDMI pclk clk\n");
841 return PTR_ERR(hdmi->pclk);
842 }
843
844 ret = clk_prepare_enable(hdmi->pclk);
845 if (ret) {
846 DRM_DEV_ERROR(hdmi->dev,
847 "Cannot enable HDMI pclk clock: %d\n", ret);
848 return ret;
849 }
850
851 irq = platform_get_irq(pdev, 0);
852 if (irq < 0) {
853 ret = irq;
854 goto err_disable_clk;
855 }
856
857 inno_hdmi_reset(hdmi);
858
859 hdmi->ddc = inno_hdmi_i2c_adapter(hdmi);
860 if (IS_ERR(hdmi->ddc)) {
861 ret = PTR_ERR(hdmi->ddc);
862 hdmi->ddc = NULL;
863 goto err_disable_clk;
864 }
865
866 /*
867 * When IP controller haven't configured to an accurate video
868 * timing, then the TMDS clock source would be switched to
869 * PCLK_HDMI, so we need to init the TMDS rate to PCLK rate,
870 * and reconfigure the DDC clock.
871 */
872 hdmi->tmds_rate = clk_get_rate(hdmi->pclk);
873 inno_hdmi_i2c_init(hdmi);
874
875 ret = inno_hdmi_register(drm, hdmi);
876 if (ret)
877 goto err_put_adapter;
878
879 dev_set_drvdata(dev, hdmi);
880
881 /* Unmute hotplug interrupt */
882 hdmi_modb(hdmi, HDMI_STATUS, m_MASK_INT_HOTPLUG, v_MASK_INT_HOTPLUG(1));
883
884 ret = devm_request_threaded_irq(dev, irq, inno_hdmi_hardirq,
885 inno_hdmi_irq, IRQF_SHARED,
886 dev_name(dev), hdmi);
887 if (ret < 0)
888 goto err_cleanup_hdmi;
889
890 return 0;
891err_cleanup_hdmi:
892 hdmi->connector.funcs->destroy(&hdmi->connector);
893 hdmi->encoder.funcs->destroy(&hdmi->encoder);
894err_put_adapter:
895 i2c_put_adapter(hdmi->ddc);
896err_disable_clk:
897 clk_disable_unprepare(hdmi->pclk);
898 return ret;
899}
900
901static void inno_hdmi_unbind(struct device *dev, struct device *master,
902 void *data)
903{
904 struct inno_hdmi *hdmi = dev_get_drvdata(dev);
905
906 hdmi->connector.funcs->destroy(&hdmi->connector);
907 hdmi->encoder.funcs->destroy(&hdmi->encoder);
908
909 i2c_put_adapter(hdmi->ddc);
910 clk_disable_unprepare(hdmi->pclk);
911}
912
913static const struct component_ops inno_hdmi_ops = {
914 .bind = inno_hdmi_bind,
915 .unbind = inno_hdmi_unbind,
916};
917
918static int inno_hdmi_probe(struct platform_device *pdev)
919{
920 return component_add(&pdev->dev, &inno_hdmi_ops);
921}
922
923static int inno_hdmi_remove(struct platform_device *pdev)
924{
925 component_del(&pdev->dev, &inno_hdmi_ops);
926
927 return 0;
928}
929
930static const struct of_device_id inno_hdmi_dt_ids[] = {
931 { .compatible = "rockchip,rk3036-inno-hdmi",
932 },
933 {},
934};
935MODULE_DEVICE_TABLE(of, inno_hdmi_dt_ids);
936
937struct platform_driver inno_hdmi_driver = {
938 .probe = inno_hdmi_probe,
939 .remove = inno_hdmi_remove,
940 .driver = {
941 .name = "innohdmi-rockchip",
942 .of_match_table = inno_hdmi_dt_ids,
943 },
944};