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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 dev_err(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 mode);
286
287 return inno_hdmi_upload_frame(hdmi, rc, &frame, INFOFRAME_VSI,
288 m_PACKET_VSI_EN, v_PACKET_VSI_EN(0), v_PACKET_VSI_EN(1));
289}
290
291static int inno_hdmi_config_video_avi(struct inno_hdmi *hdmi,
292 struct drm_display_mode *mode)
293{
294 union hdmi_infoframe frame;
295 int rc;
296
297 rc = drm_hdmi_avi_infoframe_from_display_mode(&frame.avi, mode);
298
299 if (hdmi->hdmi_data.enc_out_format == HDMI_COLORSPACE_YUV444)
300 frame.avi.colorspace = HDMI_COLORSPACE_YUV444;
301 else if (hdmi->hdmi_data.enc_out_format == HDMI_COLORSPACE_YUV422)
302 frame.avi.colorspace = HDMI_COLORSPACE_YUV422;
303 else
304 frame.avi.colorspace = HDMI_COLORSPACE_RGB;
305
306 return inno_hdmi_upload_frame(hdmi, rc, &frame, INFOFRAME_AVI, 0, 0, 0);
307}
308
309static int inno_hdmi_config_video_csc(struct inno_hdmi *hdmi)
310{
311 struct hdmi_data_info *data = &hdmi->hdmi_data;
312 int c0_c2_change = 0;
313 int csc_enable = 0;
314 int csc_mode = 0;
315 int auto_csc = 0;
316 int value;
317 int i;
318
319 /* Input video mode is SDR RGB24bit, data enable signal from external */
320 hdmi_writeb(hdmi, HDMI_VIDEO_CONTRL1, v_DE_EXTERNAL |
321 v_VIDEO_INPUT_FORMAT(VIDEO_INPUT_SDR_RGB444));
322
323 /* Input color hardcode to RGB, and output color hardcode to RGB888 */
324 value = v_VIDEO_INPUT_BITS(VIDEO_INPUT_8BITS) |
325 v_VIDEO_OUTPUT_COLOR(0) |
326 v_VIDEO_INPUT_CSP(0);
327 hdmi_writeb(hdmi, HDMI_VIDEO_CONTRL2, value);
328
329 if (data->enc_in_format == data->enc_out_format) {
330 if ((data->enc_in_format == HDMI_COLORSPACE_RGB) ||
331 (data->enc_in_format >= HDMI_COLORSPACE_YUV444)) {
332 value = v_SOF_DISABLE | v_COLOR_DEPTH_NOT_INDICATED(1);
333 hdmi_writeb(hdmi, HDMI_VIDEO_CONTRL3, value);
334
335 hdmi_modb(hdmi, HDMI_VIDEO_CONTRL,
336 m_VIDEO_AUTO_CSC | m_VIDEO_C0_C2_SWAP,
337 v_VIDEO_AUTO_CSC(AUTO_CSC_DISABLE) |
338 v_VIDEO_C0_C2_SWAP(C0_C2_CHANGE_DISABLE));
339 return 0;
340 }
341 }
342
343 if (data->colorimetry == HDMI_COLORIMETRY_ITU_601) {
344 if ((data->enc_in_format == HDMI_COLORSPACE_RGB) &&
345 (data->enc_out_format == HDMI_COLORSPACE_YUV444)) {
346 csc_mode = CSC_RGB_0_255_TO_ITU601_16_235_8BIT;
347 auto_csc = AUTO_CSC_DISABLE;
348 c0_c2_change = C0_C2_CHANGE_DISABLE;
349 csc_enable = v_CSC_ENABLE;
350 } else if ((data->enc_in_format == HDMI_COLORSPACE_YUV444) &&
351 (data->enc_out_format == HDMI_COLORSPACE_RGB)) {
352 csc_mode = CSC_ITU601_16_235_TO_RGB_0_255_8BIT;
353 auto_csc = AUTO_CSC_ENABLE;
354 c0_c2_change = C0_C2_CHANGE_DISABLE;
355 csc_enable = v_CSC_DISABLE;
356 }
357 } else {
358 if ((data->enc_in_format == HDMI_COLORSPACE_RGB) &&
359 (data->enc_out_format == HDMI_COLORSPACE_YUV444)) {
360 csc_mode = CSC_RGB_0_255_TO_ITU709_16_235_8BIT;
361 auto_csc = AUTO_CSC_DISABLE;
362 c0_c2_change = C0_C2_CHANGE_DISABLE;
363 csc_enable = v_CSC_ENABLE;
364 } else if ((data->enc_in_format == HDMI_COLORSPACE_YUV444) &&
365 (data->enc_out_format == HDMI_COLORSPACE_RGB)) {
366 csc_mode = CSC_ITU709_16_235_TO_RGB_0_255_8BIT;
367 auto_csc = AUTO_CSC_ENABLE;
368 c0_c2_change = C0_C2_CHANGE_DISABLE;
369 csc_enable = v_CSC_DISABLE;
370 }
371 }
372
373 for (i = 0; i < 24; i++)
374 hdmi_writeb(hdmi, HDMI_VIDEO_CSC_COEF + i,
375 coeff_csc[csc_mode][i]);
376
377 value = v_SOF_DISABLE | csc_enable | v_COLOR_DEPTH_NOT_INDICATED(1);
378 hdmi_writeb(hdmi, HDMI_VIDEO_CONTRL3, value);
379 hdmi_modb(hdmi, HDMI_VIDEO_CONTRL, m_VIDEO_AUTO_CSC |
380 m_VIDEO_C0_C2_SWAP, v_VIDEO_AUTO_CSC(auto_csc) |
381 v_VIDEO_C0_C2_SWAP(c0_c2_change));
382
383 return 0;
384}
385
386static int inno_hdmi_config_video_timing(struct inno_hdmi *hdmi,
387 struct drm_display_mode *mode)
388{
389 int value;
390
391 /* Set detail external video timing polarity and interlace mode */
392 value = v_EXTERANL_VIDEO(1);
393 value |= mode->flags & DRM_MODE_FLAG_PHSYNC ?
394 v_HSYNC_POLARITY(1) : v_HSYNC_POLARITY(0);
395 value |= mode->flags & DRM_MODE_FLAG_PVSYNC ?
396 v_VSYNC_POLARITY(1) : v_VSYNC_POLARITY(0);
397 value |= mode->flags & DRM_MODE_FLAG_INTERLACE ?
398 v_INETLACE(1) : v_INETLACE(0);
399 hdmi_writeb(hdmi, HDMI_VIDEO_TIMING_CTL, value);
400
401 /* Set detail external video timing */
402 value = mode->htotal;
403 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HTOTAL_L, value & 0xFF);
404 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HTOTAL_H, (value >> 8) & 0xFF);
405
406 value = mode->htotal - mode->hdisplay;
407 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HBLANK_L, value & 0xFF);
408 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HBLANK_H, (value >> 8) & 0xFF);
409
410 value = mode->hsync_start - mode->hdisplay;
411 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HDELAY_L, value & 0xFF);
412 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HDELAY_H, (value >> 8) & 0xFF);
413
414 value = mode->hsync_end - mode->hsync_start;
415 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HDURATION_L, value & 0xFF);
416 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HDURATION_H, (value >> 8) & 0xFF);
417
418 value = mode->vtotal;
419 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_VTOTAL_L, value & 0xFF);
420 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_VTOTAL_H, (value >> 8) & 0xFF);
421
422 value = mode->vtotal - mode->vdisplay;
423 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_VBLANK, value & 0xFF);
424
425 value = mode->vsync_start - mode->vdisplay;
426 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_VDELAY, value & 0xFF);
427
428 value = mode->vsync_end - mode->vsync_start;
429 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_VDURATION, value & 0xFF);
430
431 hdmi_writeb(hdmi, HDMI_PHY_PRE_DIV_RATIO, 0x1e);
432 hdmi_writeb(hdmi, HDMI_PHY_FEEDBACK_DIV_RATIO_LOW, 0x2c);
433 hdmi_writeb(hdmi, HDMI_PHY_FEEDBACK_DIV_RATIO_HIGH, 0x01);
434
435 return 0;
436}
437
438static int inno_hdmi_setup(struct inno_hdmi *hdmi,
439 struct drm_display_mode *mode)
440{
441 hdmi->hdmi_data.vic = drm_match_cea_mode(mode);
442
443 hdmi->hdmi_data.enc_in_format = HDMI_COLORSPACE_RGB;
444 hdmi->hdmi_data.enc_out_format = HDMI_COLORSPACE_RGB;
445
446 if ((hdmi->hdmi_data.vic == 6) || (hdmi->hdmi_data.vic == 7) ||
447 (hdmi->hdmi_data.vic == 21) || (hdmi->hdmi_data.vic == 22) ||
448 (hdmi->hdmi_data.vic == 2) || (hdmi->hdmi_data.vic == 3) ||
449 (hdmi->hdmi_data.vic == 17) || (hdmi->hdmi_data.vic == 18))
450 hdmi->hdmi_data.colorimetry = HDMI_COLORIMETRY_ITU_601;
451 else
452 hdmi->hdmi_data.colorimetry = HDMI_COLORIMETRY_ITU_709;
453
454 /* Mute video and audio output */
455 hdmi_modb(hdmi, HDMI_AV_MUTE, m_AUDIO_MUTE | m_VIDEO_BLACK,
456 v_AUDIO_MUTE(1) | v_VIDEO_MUTE(1));
457
458 /* Set HDMI Mode */
459 hdmi_writeb(hdmi, HDMI_HDCP_CTRL,
460 v_HDMI_DVI(hdmi->hdmi_data.sink_is_hdmi));
461
462 inno_hdmi_config_video_timing(hdmi, mode);
463
464 inno_hdmi_config_video_csc(hdmi);
465
466 if (hdmi->hdmi_data.sink_is_hdmi) {
467 inno_hdmi_config_video_avi(hdmi, mode);
468 inno_hdmi_config_video_vsi(hdmi, mode);
469 }
470
471 /*
472 * When IP controller have configured to an accurate video
473 * timing, then the TMDS clock source would be switched to
474 * DCLK_LCDC, so we need to init the TMDS rate to mode pixel
475 * clock rate, and reconfigure the DDC clock.
476 */
477 hdmi->tmds_rate = mode->clock * 1000;
478 inno_hdmi_i2c_init(hdmi);
479
480 /* Unmute video and audio output */
481 hdmi_modb(hdmi, HDMI_AV_MUTE, m_AUDIO_MUTE | m_VIDEO_BLACK,
482 v_AUDIO_MUTE(0) | v_VIDEO_MUTE(0));
483
484 return 0;
485}
486
487static void inno_hdmi_encoder_mode_set(struct drm_encoder *encoder,
488 struct drm_display_mode *mode,
489 struct drm_display_mode *adj_mode)
490{
491 struct inno_hdmi *hdmi = to_inno_hdmi(encoder);
492
493 inno_hdmi_setup(hdmi, adj_mode);
494
495 /* Store the display mode for plugin/DPMS poweron events */
496 memcpy(&hdmi->previous_mode, adj_mode, sizeof(hdmi->previous_mode));
497}
498
499static void inno_hdmi_encoder_enable(struct drm_encoder *encoder)
500{
501 struct inno_hdmi *hdmi = to_inno_hdmi(encoder);
502
503 rockchip_drm_crtc_mode_config(encoder->crtc, DRM_MODE_CONNECTOR_HDMIA,
504 ROCKCHIP_OUT_MODE_P888);
505
506 inno_hdmi_set_pwr_mode(hdmi, NORMAL);
507}
508
509static void inno_hdmi_encoder_disable(struct drm_encoder *encoder)
510{
511 struct inno_hdmi *hdmi = to_inno_hdmi(encoder);
512
513 inno_hdmi_set_pwr_mode(hdmi, LOWER_PWR);
514}
515
516static bool inno_hdmi_encoder_mode_fixup(struct drm_encoder *encoder,
517 const struct drm_display_mode *mode,
518 struct drm_display_mode *adj_mode)
519{
520 return true;
521}
522
523static struct drm_encoder_helper_funcs inno_hdmi_encoder_helper_funcs = {
524 .enable = inno_hdmi_encoder_enable,
525 .disable = inno_hdmi_encoder_disable,
526 .mode_fixup = inno_hdmi_encoder_mode_fixup,
527 .mode_set = inno_hdmi_encoder_mode_set,
528};
529
530static struct drm_encoder_funcs inno_hdmi_encoder_funcs = {
531 .destroy = drm_encoder_cleanup,
532};
533
534static enum drm_connector_status
535inno_hdmi_connector_detect(struct drm_connector *connector, bool force)
536{
537 struct inno_hdmi *hdmi = to_inno_hdmi(connector);
538
539 return (hdmi_readb(hdmi, HDMI_STATUS) & m_HOTPLUG) ?
540 connector_status_connected : connector_status_disconnected;
541}
542
543static int inno_hdmi_connector_get_modes(struct drm_connector *connector)
544{
545 struct inno_hdmi *hdmi = to_inno_hdmi(connector);
546 struct edid *edid;
547 int ret = 0;
548
549 if (!hdmi->ddc)
550 return 0;
551
552 edid = drm_get_edid(connector, hdmi->ddc);
553 if (edid) {
554 hdmi->hdmi_data.sink_is_hdmi = drm_detect_hdmi_monitor(edid);
555 hdmi->hdmi_data.sink_has_audio = drm_detect_monitor_audio(edid);
556 drm_mode_connector_update_edid_property(connector, edid);
557 ret = drm_add_edid_modes(connector, edid);
558 kfree(edid);
559 }
560
561 return ret;
562}
563
564static enum drm_mode_status
565inno_hdmi_connector_mode_valid(struct drm_connector *connector,
566 struct drm_display_mode *mode)
567{
568 return MODE_OK;
569}
570
571static struct drm_encoder *
572inno_hdmi_connector_best_encoder(struct drm_connector *connector)
573{
574 struct inno_hdmi *hdmi = to_inno_hdmi(connector);
575
576 return &hdmi->encoder;
577}
578
579static int
580inno_hdmi_probe_single_connector_modes(struct drm_connector *connector,
581 uint32_t maxX, uint32_t maxY)
582{
583 return drm_helper_probe_single_connector_modes(connector, 1920, 1080);
584}
585
586static void inno_hdmi_connector_destroy(struct drm_connector *connector)
587{
588 drm_connector_unregister(connector);
589 drm_connector_cleanup(connector);
590}
591
592static struct drm_connector_funcs inno_hdmi_connector_funcs = {
593 .dpms = drm_atomic_helper_connector_dpms,
594 .fill_modes = inno_hdmi_probe_single_connector_modes,
595 .detect = inno_hdmi_connector_detect,
596 .destroy = inno_hdmi_connector_destroy,
597 .reset = drm_atomic_helper_connector_reset,
598 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
599 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
600};
601
602static struct drm_connector_helper_funcs inno_hdmi_connector_helper_funcs = {
603 .get_modes = inno_hdmi_connector_get_modes,
604 .mode_valid = inno_hdmi_connector_mode_valid,
605 .best_encoder = inno_hdmi_connector_best_encoder,
606};
607
608static int inno_hdmi_register(struct drm_device *drm, struct inno_hdmi *hdmi)
609{
610 struct drm_encoder *encoder = &hdmi->encoder;
611 struct device *dev = hdmi->dev;
612
613 encoder->possible_crtcs = drm_of_find_possible_crtcs(drm, dev->of_node);
614
615 /*
616 * If we failed to find the CRTC(s) which this encoder is
617 * supposed to be connected to, it's because the CRTC has
618 * not been registered yet. Defer probing, and hope that
619 * the required CRTC is added later.
620 */
621 if (encoder->possible_crtcs == 0)
622 return -EPROBE_DEFER;
623
624 drm_encoder_helper_add(encoder, &inno_hdmi_encoder_helper_funcs);
625 drm_encoder_init(drm, encoder, &inno_hdmi_encoder_funcs,
626 DRM_MODE_ENCODER_TMDS, NULL);
627
628 hdmi->connector.polled = DRM_CONNECTOR_POLL_HPD;
629
630 drm_connector_helper_add(&hdmi->connector,
631 &inno_hdmi_connector_helper_funcs);
632 drm_connector_init(drm, &hdmi->connector, &inno_hdmi_connector_funcs,
633 DRM_MODE_CONNECTOR_HDMIA);
634
635 drm_mode_connector_attach_encoder(&hdmi->connector, encoder);
636
637 return 0;
638}
639
640static irqreturn_t inno_hdmi_i2c_irq(struct inno_hdmi *hdmi)
641{
642 struct inno_hdmi_i2c *i2c = hdmi->i2c;
643 u8 stat;
644
645 stat = hdmi_readb(hdmi, HDMI_INTERRUPT_STATUS1);
646 if (!(stat & m_INT_EDID_READY))
647 return IRQ_NONE;
648
649 /* Clear HDMI EDID interrupt flag */
650 hdmi_writeb(hdmi, HDMI_INTERRUPT_STATUS1, m_INT_EDID_READY);
651
652 complete(&i2c->cmp);
653
654 return IRQ_HANDLED;
655}
656
657static irqreturn_t inno_hdmi_hardirq(int irq, void *dev_id)
658{
659 struct inno_hdmi *hdmi = dev_id;
660 irqreturn_t ret = IRQ_NONE;
661 u8 interrupt;
662
663 if (hdmi->i2c)
664 ret = inno_hdmi_i2c_irq(hdmi);
665
666 interrupt = hdmi_readb(hdmi, HDMI_STATUS);
667 if (interrupt & m_INT_HOTPLUG) {
668 hdmi_modb(hdmi, HDMI_STATUS, m_INT_HOTPLUG, m_INT_HOTPLUG);
669 ret = IRQ_WAKE_THREAD;
670 }
671
672 return ret;
673}
674
675static irqreturn_t inno_hdmi_irq(int irq, void *dev_id)
676{
677 struct inno_hdmi *hdmi = dev_id;
678
679 drm_helper_hpd_irq_event(hdmi->connector.dev);
680
681 return IRQ_HANDLED;
682}
683
684static int inno_hdmi_i2c_read(struct inno_hdmi *hdmi, struct i2c_msg *msgs)
685{
686 int length = msgs->len;
687 u8 *buf = msgs->buf;
688 int ret;
689
690 ret = wait_for_completion_timeout(&hdmi->i2c->cmp, HZ / 10);
691 if (!ret)
692 return -EAGAIN;
693
694 while (length--)
695 *buf++ = hdmi_readb(hdmi, HDMI_EDID_FIFO_ADDR);
696
697 return 0;
698}
699
700static int inno_hdmi_i2c_write(struct inno_hdmi *hdmi, struct i2c_msg *msgs)
701{
702 /*
703 * The DDC module only support read EDID message, so
704 * we assume that each word write to this i2c adapter
705 * should be the offset of EDID word address.
706 */
707 if ((msgs->len != 1) ||
708 ((msgs->addr != DDC_ADDR) && (msgs->addr != DDC_SEGMENT_ADDR)))
709 return -EINVAL;
710
711 reinit_completion(&hdmi->i2c->cmp);
712
713 if (msgs->addr == DDC_SEGMENT_ADDR)
714 hdmi->i2c->segment_addr = msgs->buf[0];
715 if (msgs->addr == DDC_ADDR)
716 hdmi->i2c->ddc_addr = msgs->buf[0];
717
718 /* Set edid fifo first addr */
719 hdmi_writeb(hdmi, HDMI_EDID_FIFO_OFFSET, 0x00);
720
721 /* Set edid word address 0x00/0x80 */
722 hdmi_writeb(hdmi, HDMI_EDID_WORD_ADDR, hdmi->i2c->ddc_addr);
723
724 /* Set edid segment pointer */
725 hdmi_writeb(hdmi, HDMI_EDID_SEGMENT_POINTER, hdmi->i2c->segment_addr);
726
727 return 0;
728}
729
730static int inno_hdmi_i2c_xfer(struct i2c_adapter *adap,
731 struct i2c_msg *msgs, int num)
732{
733 struct inno_hdmi *hdmi = i2c_get_adapdata(adap);
734 struct inno_hdmi_i2c *i2c = hdmi->i2c;
735 int i, ret = 0;
736
737 mutex_lock(&i2c->lock);
738
739 /* Clear the EDID interrupt flag and unmute the interrupt */
740 hdmi_writeb(hdmi, HDMI_INTERRUPT_MASK1, m_INT_EDID_READY);
741 hdmi_writeb(hdmi, HDMI_INTERRUPT_STATUS1, m_INT_EDID_READY);
742
743 for (i = 0; i < num; i++) {
744 dev_dbg(hdmi->dev, "xfer: num: %d/%d, len: %d, flags: %#x\n",
745 i + 1, num, msgs[i].len, msgs[i].flags);
746
747 if (msgs[i].flags & I2C_M_RD)
748 ret = inno_hdmi_i2c_read(hdmi, &msgs[i]);
749 else
750 ret = inno_hdmi_i2c_write(hdmi, &msgs[i]);
751
752 if (ret < 0)
753 break;
754 }
755
756 if (!ret)
757 ret = num;
758
759 /* Mute HDMI EDID interrupt */
760 hdmi_writeb(hdmi, HDMI_INTERRUPT_MASK1, 0);
761
762 mutex_unlock(&i2c->lock);
763
764 return ret;
765}
766
767static u32 inno_hdmi_i2c_func(struct i2c_adapter *adapter)
768{
769 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
770}
771
772static const struct i2c_algorithm inno_hdmi_algorithm = {
773 .master_xfer = inno_hdmi_i2c_xfer,
774 .functionality = inno_hdmi_i2c_func,
775};
776
777static struct i2c_adapter *inno_hdmi_i2c_adapter(struct inno_hdmi *hdmi)
778{
779 struct i2c_adapter *adap;
780 struct inno_hdmi_i2c *i2c;
781 int ret;
782
783 i2c = devm_kzalloc(hdmi->dev, sizeof(*i2c), GFP_KERNEL);
784 if (!i2c)
785 return ERR_PTR(-ENOMEM);
786
787 mutex_init(&i2c->lock);
788 init_completion(&i2c->cmp);
789
790 adap = &i2c->adap;
791 adap->class = I2C_CLASS_DDC;
792 adap->owner = THIS_MODULE;
793 adap->dev.parent = hdmi->dev;
794 adap->dev.of_node = hdmi->dev->of_node;
795 adap->algo = &inno_hdmi_algorithm;
796 strlcpy(adap->name, "Inno HDMI", sizeof(adap->name));
797 i2c_set_adapdata(adap, hdmi);
798
799 ret = i2c_add_adapter(adap);
800 if (ret) {
801 dev_warn(hdmi->dev, "cannot add %s I2C adapter\n", adap->name);
802 devm_kfree(hdmi->dev, i2c);
803 return ERR_PTR(ret);
804 }
805
806 hdmi->i2c = i2c;
807
808 dev_info(hdmi->dev, "registered %s I2C bus driver\n", adap->name);
809
810 return adap;
811}
812
813static int inno_hdmi_bind(struct device *dev, struct device *master,
814 void *data)
815{
816 struct platform_device *pdev = to_platform_device(dev);
817 struct drm_device *drm = data;
818 struct inno_hdmi *hdmi;
819 struct resource *iores;
820 int irq;
821 int ret;
822
823 hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL);
824 if (!hdmi)
825 return -ENOMEM;
826
827 hdmi->dev = dev;
828 hdmi->drm_dev = drm;
829
830 iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
831 if (!iores)
832 return -ENXIO;
833
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 dev_err(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 dev_err(hdmi->dev, "Cannot enable HDMI pclk clock: %d\n", ret);
847 return ret;
848 }
849
850 irq = platform_get_irq(pdev, 0);
851 if (irq < 0)
852 return irq;
853
854 inno_hdmi_reset(hdmi);
855
856 hdmi->ddc = inno_hdmi_i2c_adapter(hdmi);
857 if (IS_ERR(hdmi->ddc)) {
858 hdmi->ddc = NULL;
859 return PTR_ERR(hdmi->ddc);
860 }
861
862 /*
863 * When IP controller haven't configured to an accurate video
864 * timing, then the TMDS clock source would be switched to
865 * PCLK_HDMI, so we need to init the TMDS rate to PCLK rate,
866 * and reconfigure the DDC clock.
867 */
868 hdmi->tmds_rate = clk_get_rate(hdmi->pclk);
869 inno_hdmi_i2c_init(hdmi);
870
871 ret = inno_hdmi_register(drm, hdmi);
872 if (ret)
873 return ret;
874
875 dev_set_drvdata(dev, hdmi);
876
877 /* Unmute hotplug interrupt */
878 hdmi_modb(hdmi, HDMI_STATUS, m_MASK_INT_HOTPLUG, v_MASK_INT_HOTPLUG(1));
879
880 ret = devm_request_threaded_irq(dev, irq, inno_hdmi_hardirq,
881 inno_hdmi_irq, IRQF_SHARED,
882 dev_name(dev), hdmi);
883
884 return ret;
885}
886
887static void inno_hdmi_unbind(struct device *dev, struct device *master,
888 void *data)
889{
890 struct inno_hdmi *hdmi = dev_get_drvdata(dev);
891
892 hdmi->connector.funcs->destroy(&hdmi->connector);
893 hdmi->encoder.funcs->destroy(&hdmi->encoder);
894
895 clk_disable_unprepare(hdmi->pclk);
896 i2c_put_adapter(hdmi->ddc);
897}
898
899static const struct component_ops inno_hdmi_ops = {
900 .bind = inno_hdmi_bind,
901 .unbind = inno_hdmi_unbind,
902};
903
904static int inno_hdmi_probe(struct platform_device *pdev)
905{
906 return component_add(&pdev->dev, &inno_hdmi_ops);
907}
908
909static int inno_hdmi_remove(struct platform_device *pdev)
910{
911 component_del(&pdev->dev, &inno_hdmi_ops);
912
913 return 0;
914}
915
916static const struct of_device_id inno_hdmi_dt_ids[] = {
917 { .compatible = "rockchip,rk3036-inno-hdmi",
918 },
919 {},
920};
921MODULE_DEVICE_TABLE(of, inno_hdmi_dt_ids);
922
923static struct platform_driver inno_hdmi_driver = {
924 .probe = inno_hdmi_probe,
925 .remove = inno_hdmi_remove,
926 .driver = {
927 .name = "innohdmi-rockchip",
928 .of_match_table = inno_hdmi_dt_ids,
929 },
930};
931
932module_platform_driver(inno_hdmi_driver);
933
934MODULE_AUTHOR("Zheng Yang <zhengyang@rock-chips.com>");
935MODULE_AUTHOR("Yakir Yang <ykk@rock-chips.com>");
936MODULE_DESCRIPTION("Rockchip Specific INNO-HDMI Driver");
937MODULE_LICENSE("GPL v2");
938MODULE_ALIAS("platform:innohdmi-rockchip");