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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
4 * Zheng Yang <zhengyang@rock-chips.com>
5 * Yakir Yang <ykk@rock-chips.com>
6 */
7
8#include <linux/irq.h>
9#include <linux/clk.h>
10#include <linux/delay.h>
11#include <linux/err.h>
12#include <linux/hdmi.h>
13#include <linux/mfd/syscon.h>
14#include <linux/module.h>
15#include <linux/mutex.h>
16#include <linux/of_device.h>
17
18#include <drm/drm_atomic_helper.h>
19#include <drm/drm_edid.h>
20#include <drm/drm_of.h>
21#include <drm/drm_probe_helper.h>
22
23#include "rockchip_drm_drv.h"
24#include "rockchip_drm_vop.h"
25
26#include "inno_hdmi.h"
27
28#define to_inno_hdmi(x) container_of(x, struct inno_hdmi, x)
29
30struct hdmi_data_info {
31 int vic;
32 bool sink_is_hdmi;
33 bool sink_has_audio;
34 unsigned int enc_in_format;
35 unsigned int enc_out_format;
36 unsigned int colorimetry;
37};
38
39struct inno_hdmi_i2c {
40 struct i2c_adapter adap;
41
42 u8 ddc_addr;
43 u8 segment_addr;
44
45 struct mutex lock;
46 struct completion cmp;
47};
48
49struct inno_hdmi {
50 struct device *dev;
51 struct drm_device *drm_dev;
52
53 int irq;
54 struct clk *pclk;
55 void __iomem *regs;
56
57 struct drm_connector connector;
58 struct drm_encoder encoder;
59
60 struct inno_hdmi_i2c *i2c;
61 struct i2c_adapter *ddc;
62
63 unsigned int tmds_rate;
64
65 struct hdmi_data_info hdmi_data;
66 struct drm_display_mode previous_mode;
67};
68
69enum {
70 CSC_ITU601_16_235_TO_RGB_0_255_8BIT,
71 CSC_ITU601_0_255_TO_RGB_0_255_8BIT,
72 CSC_ITU709_16_235_TO_RGB_0_255_8BIT,
73 CSC_RGB_0_255_TO_ITU601_16_235_8BIT,
74 CSC_RGB_0_255_TO_ITU709_16_235_8BIT,
75 CSC_RGB_0_255_TO_RGB_16_235_8BIT,
76};
77
78static const char coeff_csc[][24] = {
79 /*
80 * YUV2RGB:601 SD mode(Y[16:235], UV[16:240], RGB[0:255]):
81 * R = 1.164*Y + 1.596*V - 204
82 * G = 1.164*Y - 0.391*U - 0.813*V + 154
83 * B = 1.164*Y + 2.018*U - 258
84 */
85 {
86 0x04, 0xa7, 0x00, 0x00, 0x06, 0x62, 0x02, 0xcc,
87 0x04, 0xa7, 0x11, 0x90, 0x13, 0x40, 0x00, 0x9a,
88 0x04, 0xa7, 0x08, 0x12, 0x00, 0x00, 0x03, 0x02
89 },
90 /*
91 * YUV2RGB:601 SD mode(YUV[0:255],RGB[0:255]):
92 * R = Y + 1.402*V - 248
93 * G = Y - 0.344*U - 0.714*V + 135
94 * B = Y + 1.772*U - 227
95 */
96 {
97 0x04, 0x00, 0x00, 0x00, 0x05, 0x9b, 0x02, 0xf8,
98 0x04, 0x00, 0x11, 0x60, 0x12, 0xdb, 0x00, 0x87,
99 0x04, 0x00, 0x07, 0x16, 0x00, 0x00, 0x02, 0xe3
100 },
101 /*
102 * YUV2RGB:709 HD mode(Y[16:235],UV[16:240],RGB[0:255]):
103 * R = 1.164*Y + 1.793*V - 248
104 * G = 1.164*Y - 0.213*U - 0.534*V + 77
105 * B = 1.164*Y + 2.115*U - 289
106 */
107 {
108 0x04, 0xa7, 0x00, 0x00, 0x07, 0x2c, 0x02, 0xf8,
109 0x04, 0xa7, 0x10, 0xda, 0x12, 0x22, 0x00, 0x4d,
110 0x04, 0xa7, 0x08, 0x74, 0x00, 0x00, 0x03, 0x21
111 },
112
113 /*
114 * RGB2YUV:601 SD mode:
115 * Cb = -0.291G - 0.148R + 0.439B + 128
116 * Y = 0.504G + 0.257R + 0.098B + 16
117 * Cr = -0.368G + 0.439R - 0.071B + 128
118 */
119 {
120 0x11, 0x5f, 0x01, 0x82, 0x10, 0x23, 0x00, 0x80,
121 0x02, 0x1c, 0x00, 0xa1, 0x00, 0x36, 0x00, 0x1e,
122 0x11, 0x29, 0x10, 0x59, 0x01, 0x82, 0x00, 0x80
123 },
124 /*
125 * RGB2YUV:709 HD mode:
126 * Cb = - 0.338G - 0.101R + 0.439B + 128
127 * Y = 0.614G + 0.183R + 0.062B + 16
128 * Cr = - 0.399G + 0.439R - 0.040B + 128
129 */
130 {
131 0x11, 0x98, 0x01, 0xc1, 0x10, 0x28, 0x00, 0x80,
132 0x02, 0x74, 0x00, 0xbb, 0x00, 0x3f, 0x00, 0x10,
133 0x11, 0x5a, 0x10, 0x67, 0x01, 0xc1, 0x00, 0x80
134 },
135 /*
136 * RGB[0:255]2RGB[16:235]:
137 * R' = R x (235-16)/255 + 16;
138 * G' = G x (235-16)/255 + 16;
139 * B' = B x (235-16)/255 + 16;
140 */
141 {
142 0x00, 0x00, 0x03, 0x6F, 0x00, 0x00, 0x00, 0x10,
143 0x03, 0x6F, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10,
144 0x00, 0x00, 0x00, 0x00, 0x03, 0x6F, 0x00, 0x10
145 },
146};
147
148static inline u8 hdmi_readb(struct inno_hdmi *hdmi, u16 offset)
149{
150 return readl_relaxed(hdmi->regs + (offset) * 0x04);
151}
152
153static inline void hdmi_writeb(struct inno_hdmi *hdmi, u16 offset, u32 val)
154{
155 writel_relaxed(val, hdmi->regs + (offset) * 0x04);
156}
157
158static inline void hdmi_modb(struct inno_hdmi *hdmi, u16 offset,
159 u32 msk, u32 val)
160{
161 u8 temp = hdmi_readb(hdmi, offset) & ~msk;
162
163 temp |= val & msk;
164 hdmi_writeb(hdmi, offset, temp);
165}
166
167static void inno_hdmi_i2c_init(struct inno_hdmi *hdmi)
168{
169 int ddc_bus_freq;
170
171 ddc_bus_freq = (hdmi->tmds_rate >> 2) / HDMI_SCL_RATE;
172
173 hdmi_writeb(hdmi, DDC_BUS_FREQ_L, ddc_bus_freq & 0xFF);
174 hdmi_writeb(hdmi, DDC_BUS_FREQ_H, (ddc_bus_freq >> 8) & 0xFF);
175
176 /* Clear the EDID interrupt flag and mute the interrupt */
177 hdmi_writeb(hdmi, HDMI_INTERRUPT_MASK1, 0);
178 hdmi_writeb(hdmi, HDMI_INTERRUPT_STATUS1, m_INT_EDID_READY);
179}
180
181static void inno_hdmi_sys_power(struct inno_hdmi *hdmi, bool enable)
182{
183 if (enable)
184 hdmi_modb(hdmi, HDMI_SYS_CTRL, m_POWER, v_PWR_ON);
185 else
186 hdmi_modb(hdmi, HDMI_SYS_CTRL, m_POWER, v_PWR_OFF);
187}
188
189static void inno_hdmi_set_pwr_mode(struct inno_hdmi *hdmi, int mode)
190{
191 switch (mode) {
192 case NORMAL:
193 inno_hdmi_sys_power(hdmi, false);
194
195 hdmi_writeb(hdmi, HDMI_PHY_PRE_EMPHASIS, 0x6f);
196 hdmi_writeb(hdmi, HDMI_PHY_DRIVER, 0xbb);
197
198 hdmi_writeb(hdmi, HDMI_PHY_SYS_CTL, 0x15);
199 hdmi_writeb(hdmi, HDMI_PHY_SYS_CTL, 0x14);
200 hdmi_writeb(hdmi, HDMI_PHY_SYS_CTL, 0x10);
201 hdmi_writeb(hdmi, HDMI_PHY_CHG_PWR, 0x0f);
202 hdmi_writeb(hdmi, HDMI_PHY_SYNC, 0x00);
203 hdmi_writeb(hdmi, HDMI_PHY_SYNC, 0x01);
204
205 inno_hdmi_sys_power(hdmi, true);
206 break;
207
208 case LOWER_PWR:
209 inno_hdmi_sys_power(hdmi, false);
210 hdmi_writeb(hdmi, HDMI_PHY_DRIVER, 0x00);
211 hdmi_writeb(hdmi, HDMI_PHY_PRE_EMPHASIS, 0x00);
212 hdmi_writeb(hdmi, HDMI_PHY_CHG_PWR, 0x00);
213 hdmi_writeb(hdmi, HDMI_PHY_SYS_CTL, 0x15);
214
215 break;
216
217 default:
218 DRM_DEV_ERROR(hdmi->dev, "Unknown power mode %d\n", mode);
219 }
220}
221
222static void inno_hdmi_reset(struct inno_hdmi *hdmi)
223{
224 u32 val;
225 u32 msk;
226
227 hdmi_modb(hdmi, HDMI_SYS_CTRL, m_RST_DIGITAL, v_NOT_RST_DIGITAL);
228 udelay(100);
229
230 hdmi_modb(hdmi, HDMI_SYS_CTRL, m_RST_ANALOG, v_NOT_RST_ANALOG);
231 udelay(100);
232
233 msk = m_REG_CLK_INV | m_REG_CLK_SOURCE | m_POWER | m_INT_POL;
234 val = v_REG_CLK_INV | v_REG_CLK_SOURCE_SYS | v_PWR_ON | v_INT_POL_HIGH;
235 hdmi_modb(hdmi, HDMI_SYS_CTRL, msk, val);
236
237 inno_hdmi_set_pwr_mode(hdmi, NORMAL);
238}
239
240static int inno_hdmi_upload_frame(struct inno_hdmi *hdmi, int setup_rc,
241 union hdmi_infoframe *frame, u32 frame_index,
242 u32 mask, u32 disable, u32 enable)
243{
244 if (mask)
245 hdmi_modb(hdmi, HDMI_PACKET_SEND_AUTO, mask, disable);
246
247 hdmi_writeb(hdmi, HDMI_CONTROL_PACKET_BUF_INDEX, frame_index);
248
249 if (setup_rc >= 0) {
250 u8 packed_frame[HDMI_MAXIMUM_INFO_FRAME_SIZE];
251 ssize_t rc, i;
252
253 rc = hdmi_infoframe_pack(frame, packed_frame,
254 sizeof(packed_frame));
255 if (rc < 0)
256 return rc;
257
258 for (i = 0; i < rc; i++)
259 hdmi_writeb(hdmi, HDMI_CONTROL_PACKET_ADDR + i,
260 packed_frame[i]);
261
262 if (mask)
263 hdmi_modb(hdmi, HDMI_PACKET_SEND_AUTO, mask, enable);
264 }
265
266 return setup_rc;
267}
268
269static int inno_hdmi_config_video_vsi(struct inno_hdmi *hdmi,
270 struct drm_display_mode *mode)
271{
272 union hdmi_infoframe frame;
273 int rc;
274
275 rc = drm_hdmi_vendor_infoframe_from_display_mode(&frame.vendor.hdmi,
276 &hdmi->connector,
277 mode);
278
279 return inno_hdmi_upload_frame(hdmi, rc, &frame, INFOFRAME_VSI,
280 m_PACKET_VSI_EN, v_PACKET_VSI_EN(0), v_PACKET_VSI_EN(1));
281}
282
283static int inno_hdmi_config_video_avi(struct inno_hdmi *hdmi,
284 struct drm_display_mode *mode)
285{
286 union hdmi_infoframe frame;
287 int rc;
288
289 rc = drm_hdmi_avi_infoframe_from_display_mode(&frame.avi,
290 &hdmi->connector,
291 mode);
292
293 if (hdmi->hdmi_data.enc_out_format == HDMI_COLORSPACE_YUV444)
294 frame.avi.colorspace = HDMI_COLORSPACE_YUV444;
295 else if (hdmi->hdmi_data.enc_out_format == HDMI_COLORSPACE_YUV422)
296 frame.avi.colorspace = HDMI_COLORSPACE_YUV422;
297 else
298 frame.avi.colorspace = HDMI_COLORSPACE_RGB;
299
300 return inno_hdmi_upload_frame(hdmi, rc, &frame, INFOFRAME_AVI, 0, 0, 0);
301}
302
303static int inno_hdmi_config_video_csc(struct inno_hdmi *hdmi)
304{
305 struct hdmi_data_info *data = &hdmi->hdmi_data;
306 int c0_c2_change = 0;
307 int csc_enable = 0;
308 int csc_mode = 0;
309 int auto_csc = 0;
310 int value;
311 int i;
312
313 /* Input video mode is SDR RGB24bit, data enable signal from external */
314 hdmi_writeb(hdmi, HDMI_VIDEO_CONTRL1, v_DE_EXTERNAL |
315 v_VIDEO_INPUT_FORMAT(VIDEO_INPUT_SDR_RGB444));
316
317 /* Input color hardcode to RGB, and output color hardcode to RGB888 */
318 value = v_VIDEO_INPUT_BITS(VIDEO_INPUT_8BITS) |
319 v_VIDEO_OUTPUT_COLOR(0) |
320 v_VIDEO_INPUT_CSP(0);
321 hdmi_writeb(hdmi, HDMI_VIDEO_CONTRL2, value);
322
323 if (data->enc_in_format == data->enc_out_format) {
324 if ((data->enc_in_format == HDMI_COLORSPACE_RGB) ||
325 (data->enc_in_format >= HDMI_COLORSPACE_YUV444)) {
326 value = v_SOF_DISABLE | v_COLOR_DEPTH_NOT_INDICATED(1);
327 hdmi_writeb(hdmi, HDMI_VIDEO_CONTRL3, value);
328
329 hdmi_modb(hdmi, HDMI_VIDEO_CONTRL,
330 m_VIDEO_AUTO_CSC | m_VIDEO_C0_C2_SWAP,
331 v_VIDEO_AUTO_CSC(AUTO_CSC_DISABLE) |
332 v_VIDEO_C0_C2_SWAP(C0_C2_CHANGE_DISABLE));
333 return 0;
334 }
335 }
336
337 if (data->colorimetry == HDMI_COLORIMETRY_ITU_601) {
338 if ((data->enc_in_format == HDMI_COLORSPACE_RGB) &&
339 (data->enc_out_format == HDMI_COLORSPACE_YUV444)) {
340 csc_mode = CSC_RGB_0_255_TO_ITU601_16_235_8BIT;
341 auto_csc = AUTO_CSC_DISABLE;
342 c0_c2_change = C0_C2_CHANGE_DISABLE;
343 csc_enable = v_CSC_ENABLE;
344 } else if ((data->enc_in_format == HDMI_COLORSPACE_YUV444) &&
345 (data->enc_out_format == HDMI_COLORSPACE_RGB)) {
346 csc_mode = CSC_ITU601_16_235_TO_RGB_0_255_8BIT;
347 auto_csc = AUTO_CSC_ENABLE;
348 c0_c2_change = C0_C2_CHANGE_DISABLE;
349 csc_enable = v_CSC_DISABLE;
350 }
351 } else {
352 if ((data->enc_in_format == HDMI_COLORSPACE_RGB) &&
353 (data->enc_out_format == HDMI_COLORSPACE_YUV444)) {
354 csc_mode = CSC_RGB_0_255_TO_ITU709_16_235_8BIT;
355 auto_csc = AUTO_CSC_DISABLE;
356 c0_c2_change = C0_C2_CHANGE_DISABLE;
357 csc_enable = v_CSC_ENABLE;
358 } else if ((data->enc_in_format == HDMI_COLORSPACE_YUV444) &&
359 (data->enc_out_format == HDMI_COLORSPACE_RGB)) {
360 csc_mode = CSC_ITU709_16_235_TO_RGB_0_255_8BIT;
361 auto_csc = AUTO_CSC_ENABLE;
362 c0_c2_change = C0_C2_CHANGE_DISABLE;
363 csc_enable = v_CSC_DISABLE;
364 }
365 }
366
367 for (i = 0; i < 24; i++)
368 hdmi_writeb(hdmi, HDMI_VIDEO_CSC_COEF + i,
369 coeff_csc[csc_mode][i]);
370
371 value = v_SOF_DISABLE | csc_enable | v_COLOR_DEPTH_NOT_INDICATED(1);
372 hdmi_writeb(hdmi, HDMI_VIDEO_CONTRL3, value);
373 hdmi_modb(hdmi, HDMI_VIDEO_CONTRL, m_VIDEO_AUTO_CSC |
374 m_VIDEO_C0_C2_SWAP, v_VIDEO_AUTO_CSC(auto_csc) |
375 v_VIDEO_C0_C2_SWAP(c0_c2_change));
376
377 return 0;
378}
379
380static int inno_hdmi_config_video_timing(struct inno_hdmi *hdmi,
381 struct drm_display_mode *mode)
382{
383 int value;
384
385 /* Set detail external video timing polarity and interlace mode */
386 value = v_EXTERANL_VIDEO(1);
387 value |= mode->flags & DRM_MODE_FLAG_PHSYNC ?
388 v_HSYNC_POLARITY(1) : v_HSYNC_POLARITY(0);
389 value |= mode->flags & DRM_MODE_FLAG_PVSYNC ?
390 v_VSYNC_POLARITY(1) : v_VSYNC_POLARITY(0);
391 value |= mode->flags & DRM_MODE_FLAG_INTERLACE ?
392 v_INETLACE(1) : v_INETLACE(0);
393 hdmi_writeb(hdmi, HDMI_VIDEO_TIMING_CTL, value);
394
395 /* Set detail external video timing */
396 value = mode->htotal;
397 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HTOTAL_L, value & 0xFF);
398 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HTOTAL_H, (value >> 8) & 0xFF);
399
400 value = mode->htotal - mode->hdisplay;
401 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HBLANK_L, value & 0xFF);
402 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HBLANK_H, (value >> 8) & 0xFF);
403
404 value = mode->hsync_start - mode->hdisplay;
405 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HDELAY_L, value & 0xFF);
406 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HDELAY_H, (value >> 8) & 0xFF);
407
408 value = mode->hsync_end - mode->hsync_start;
409 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HDURATION_L, value & 0xFF);
410 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HDURATION_H, (value >> 8) & 0xFF);
411
412 value = mode->vtotal;
413 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_VTOTAL_L, value & 0xFF);
414 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_VTOTAL_H, (value >> 8) & 0xFF);
415
416 value = mode->vtotal - mode->vdisplay;
417 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_VBLANK, value & 0xFF);
418
419 value = mode->vsync_start - mode->vdisplay;
420 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_VDELAY, value & 0xFF);
421
422 value = mode->vsync_end - mode->vsync_start;
423 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_VDURATION, value & 0xFF);
424
425 hdmi_writeb(hdmi, HDMI_PHY_PRE_DIV_RATIO, 0x1e);
426 hdmi_writeb(hdmi, HDMI_PHY_FEEDBACK_DIV_RATIO_LOW, 0x2c);
427 hdmi_writeb(hdmi, HDMI_PHY_FEEDBACK_DIV_RATIO_HIGH, 0x01);
428
429 return 0;
430}
431
432static int inno_hdmi_setup(struct inno_hdmi *hdmi,
433 struct drm_display_mode *mode)
434{
435 hdmi->hdmi_data.vic = drm_match_cea_mode(mode);
436
437 hdmi->hdmi_data.enc_in_format = HDMI_COLORSPACE_RGB;
438 hdmi->hdmi_data.enc_out_format = HDMI_COLORSPACE_RGB;
439
440 if ((hdmi->hdmi_data.vic == 6) || (hdmi->hdmi_data.vic == 7) ||
441 (hdmi->hdmi_data.vic == 21) || (hdmi->hdmi_data.vic == 22) ||
442 (hdmi->hdmi_data.vic == 2) || (hdmi->hdmi_data.vic == 3) ||
443 (hdmi->hdmi_data.vic == 17) || (hdmi->hdmi_data.vic == 18))
444 hdmi->hdmi_data.colorimetry = HDMI_COLORIMETRY_ITU_601;
445 else
446 hdmi->hdmi_data.colorimetry = HDMI_COLORIMETRY_ITU_709;
447
448 /* Mute video and audio output */
449 hdmi_modb(hdmi, HDMI_AV_MUTE, m_AUDIO_MUTE | m_VIDEO_BLACK,
450 v_AUDIO_MUTE(1) | v_VIDEO_MUTE(1));
451
452 /* Set HDMI Mode */
453 hdmi_writeb(hdmi, HDMI_HDCP_CTRL,
454 v_HDMI_DVI(hdmi->hdmi_data.sink_is_hdmi));
455
456 inno_hdmi_config_video_timing(hdmi, mode);
457
458 inno_hdmi_config_video_csc(hdmi);
459
460 if (hdmi->hdmi_data.sink_is_hdmi) {
461 inno_hdmi_config_video_avi(hdmi, mode);
462 inno_hdmi_config_video_vsi(hdmi, mode);
463 }
464
465 /*
466 * When IP controller have configured to an accurate video
467 * timing, then the TMDS clock source would be switched to
468 * DCLK_LCDC, so we need to init the TMDS rate to mode pixel
469 * clock rate, and reconfigure the DDC clock.
470 */
471 hdmi->tmds_rate = mode->clock * 1000;
472 inno_hdmi_i2c_init(hdmi);
473
474 /* Unmute video and audio output */
475 hdmi_modb(hdmi, HDMI_AV_MUTE, m_AUDIO_MUTE | m_VIDEO_BLACK,
476 v_AUDIO_MUTE(0) | v_VIDEO_MUTE(0));
477
478 return 0;
479}
480
481static void inno_hdmi_encoder_mode_set(struct drm_encoder *encoder,
482 struct drm_display_mode *mode,
483 struct drm_display_mode *adj_mode)
484{
485 struct inno_hdmi *hdmi = to_inno_hdmi(encoder);
486
487 inno_hdmi_setup(hdmi, adj_mode);
488
489 /* Store the display mode for plugin/DPMS poweron events */
490 memcpy(&hdmi->previous_mode, adj_mode, sizeof(hdmi->previous_mode));
491}
492
493static void inno_hdmi_encoder_enable(struct drm_encoder *encoder)
494{
495 struct inno_hdmi *hdmi = to_inno_hdmi(encoder);
496
497 inno_hdmi_set_pwr_mode(hdmi, NORMAL);
498}
499
500static void inno_hdmi_encoder_disable(struct drm_encoder *encoder)
501{
502 struct inno_hdmi *hdmi = to_inno_hdmi(encoder);
503
504 inno_hdmi_set_pwr_mode(hdmi, LOWER_PWR);
505}
506
507static bool inno_hdmi_encoder_mode_fixup(struct drm_encoder *encoder,
508 const struct drm_display_mode *mode,
509 struct drm_display_mode *adj_mode)
510{
511 return true;
512}
513
514static int
515inno_hdmi_encoder_atomic_check(struct drm_encoder *encoder,
516 struct drm_crtc_state *crtc_state,
517 struct drm_connector_state *conn_state)
518{
519 struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
520
521 s->output_mode = ROCKCHIP_OUT_MODE_P888;
522 s->output_type = DRM_MODE_CONNECTOR_HDMIA;
523
524 return 0;
525}
526
527static struct drm_encoder_helper_funcs inno_hdmi_encoder_helper_funcs = {
528 .enable = inno_hdmi_encoder_enable,
529 .disable = inno_hdmi_encoder_disable,
530 .mode_fixup = inno_hdmi_encoder_mode_fixup,
531 .mode_set = inno_hdmi_encoder_mode_set,
532 .atomic_check = inno_hdmi_encoder_atomic_check,
533};
534
535static struct drm_encoder_funcs inno_hdmi_encoder_funcs = {
536 .destroy = drm_encoder_cleanup,
537};
538
539static enum drm_connector_status
540inno_hdmi_connector_detect(struct drm_connector *connector, bool force)
541{
542 struct inno_hdmi *hdmi = to_inno_hdmi(connector);
543
544 return (hdmi_readb(hdmi, HDMI_STATUS) & m_HOTPLUG) ?
545 connector_status_connected : connector_status_disconnected;
546}
547
548static int inno_hdmi_connector_get_modes(struct drm_connector *connector)
549{
550 struct inno_hdmi *hdmi = to_inno_hdmi(connector);
551 struct edid *edid;
552 int ret = 0;
553
554 if (!hdmi->ddc)
555 return 0;
556
557 edid = drm_get_edid(connector, hdmi->ddc);
558 if (edid) {
559 hdmi->hdmi_data.sink_is_hdmi = drm_detect_hdmi_monitor(edid);
560 hdmi->hdmi_data.sink_has_audio = drm_detect_monitor_audio(edid);
561 drm_connector_update_edid_property(connector, edid);
562 ret = drm_add_edid_modes(connector, edid);
563 kfree(edid);
564 }
565
566 return ret;
567}
568
569static enum drm_mode_status
570inno_hdmi_connector_mode_valid(struct drm_connector *connector,
571 struct drm_display_mode *mode)
572{
573 return MODE_OK;
574}
575
576static int
577inno_hdmi_probe_single_connector_modes(struct drm_connector *connector,
578 uint32_t maxX, uint32_t maxY)
579{
580 return drm_helper_probe_single_connector_modes(connector, 1920, 1080);
581}
582
583static void inno_hdmi_connector_destroy(struct drm_connector *connector)
584{
585 drm_connector_unregister(connector);
586 drm_connector_cleanup(connector);
587}
588
589static const struct drm_connector_funcs inno_hdmi_connector_funcs = {
590 .fill_modes = inno_hdmi_probe_single_connector_modes,
591 .detect = inno_hdmi_connector_detect,
592 .destroy = inno_hdmi_connector_destroy,
593 .reset = drm_atomic_helper_connector_reset,
594 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
595 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
596};
597
598static struct drm_connector_helper_funcs inno_hdmi_connector_helper_funcs = {
599 .get_modes = inno_hdmi_connector_get_modes,
600 .mode_valid = inno_hdmi_connector_mode_valid,
601};
602
603static int inno_hdmi_register(struct drm_device *drm, struct inno_hdmi *hdmi)
604{
605 struct drm_encoder *encoder = &hdmi->encoder;
606 struct device *dev = hdmi->dev;
607
608 encoder->possible_crtcs = drm_of_find_possible_crtcs(drm, dev->of_node);
609
610 /*
611 * If we failed to find the CRTC(s) which this encoder is
612 * supposed to be connected to, it's because the CRTC has
613 * not been registered yet. Defer probing, and hope that
614 * the required CRTC is added later.
615 */
616 if (encoder->possible_crtcs == 0)
617 return -EPROBE_DEFER;
618
619 drm_encoder_helper_add(encoder, &inno_hdmi_encoder_helper_funcs);
620 drm_encoder_init(drm, encoder, &inno_hdmi_encoder_funcs,
621 DRM_MODE_ENCODER_TMDS, NULL);
622
623 hdmi->connector.polled = DRM_CONNECTOR_POLL_HPD;
624
625 drm_connector_helper_add(&hdmi->connector,
626 &inno_hdmi_connector_helper_funcs);
627 drm_connector_init(drm, &hdmi->connector, &inno_hdmi_connector_funcs,
628 DRM_MODE_CONNECTOR_HDMIA);
629
630 drm_connector_attach_encoder(&hdmi->connector, encoder);
631
632 return 0;
633}
634
635static irqreturn_t inno_hdmi_i2c_irq(struct inno_hdmi *hdmi)
636{
637 struct inno_hdmi_i2c *i2c = hdmi->i2c;
638 u8 stat;
639
640 stat = hdmi_readb(hdmi, HDMI_INTERRUPT_STATUS1);
641 if (!(stat & m_INT_EDID_READY))
642 return IRQ_NONE;
643
644 /* Clear HDMI EDID interrupt flag */
645 hdmi_writeb(hdmi, HDMI_INTERRUPT_STATUS1, m_INT_EDID_READY);
646
647 complete(&i2c->cmp);
648
649 return IRQ_HANDLED;
650}
651
652static irqreturn_t inno_hdmi_hardirq(int irq, void *dev_id)
653{
654 struct inno_hdmi *hdmi = dev_id;
655 irqreturn_t ret = IRQ_NONE;
656 u8 interrupt;
657
658 if (hdmi->i2c)
659 ret = inno_hdmi_i2c_irq(hdmi);
660
661 interrupt = hdmi_readb(hdmi, HDMI_STATUS);
662 if (interrupt & m_INT_HOTPLUG) {
663 hdmi_modb(hdmi, HDMI_STATUS, m_INT_HOTPLUG, m_INT_HOTPLUG);
664 ret = IRQ_WAKE_THREAD;
665 }
666
667 return ret;
668}
669
670static irqreturn_t inno_hdmi_irq(int irq, void *dev_id)
671{
672 struct inno_hdmi *hdmi = dev_id;
673
674 drm_helper_hpd_irq_event(hdmi->connector.dev);
675
676 return IRQ_HANDLED;
677}
678
679static int inno_hdmi_i2c_read(struct inno_hdmi *hdmi, struct i2c_msg *msgs)
680{
681 int length = msgs->len;
682 u8 *buf = msgs->buf;
683 int ret;
684
685 ret = wait_for_completion_timeout(&hdmi->i2c->cmp, HZ / 10);
686 if (!ret)
687 return -EAGAIN;
688
689 while (length--)
690 *buf++ = hdmi_readb(hdmi, HDMI_EDID_FIFO_ADDR);
691
692 return 0;
693}
694
695static int inno_hdmi_i2c_write(struct inno_hdmi *hdmi, struct i2c_msg *msgs)
696{
697 /*
698 * The DDC module only support read EDID message, so
699 * we assume that each word write to this i2c adapter
700 * should be the offset of EDID word address.
701 */
702 if ((msgs->len != 1) ||
703 ((msgs->addr != DDC_ADDR) && (msgs->addr != DDC_SEGMENT_ADDR)))
704 return -EINVAL;
705
706 reinit_completion(&hdmi->i2c->cmp);
707
708 if (msgs->addr == DDC_SEGMENT_ADDR)
709 hdmi->i2c->segment_addr = msgs->buf[0];
710 if (msgs->addr == DDC_ADDR)
711 hdmi->i2c->ddc_addr = msgs->buf[0];
712
713 /* Set edid fifo first addr */
714 hdmi_writeb(hdmi, HDMI_EDID_FIFO_OFFSET, 0x00);
715
716 /* Set edid word address 0x00/0x80 */
717 hdmi_writeb(hdmi, HDMI_EDID_WORD_ADDR, hdmi->i2c->ddc_addr);
718
719 /* Set edid segment pointer */
720 hdmi_writeb(hdmi, HDMI_EDID_SEGMENT_POINTER, hdmi->i2c->segment_addr);
721
722 return 0;
723}
724
725static int inno_hdmi_i2c_xfer(struct i2c_adapter *adap,
726 struct i2c_msg *msgs, int num)
727{
728 struct inno_hdmi *hdmi = i2c_get_adapdata(adap);
729 struct inno_hdmi_i2c *i2c = hdmi->i2c;
730 int i, ret = 0;
731
732 mutex_lock(&i2c->lock);
733
734 /* Clear the EDID interrupt flag and unmute the interrupt */
735 hdmi_writeb(hdmi, HDMI_INTERRUPT_MASK1, m_INT_EDID_READY);
736 hdmi_writeb(hdmi, HDMI_INTERRUPT_STATUS1, m_INT_EDID_READY);
737
738 for (i = 0; i < num; i++) {
739 DRM_DEV_DEBUG(hdmi->dev,
740 "xfer: num: %d/%d, len: %d, flags: %#x\n",
741 i + 1, num, msgs[i].len, msgs[i].flags);
742
743 if (msgs[i].flags & I2C_M_RD)
744 ret = inno_hdmi_i2c_read(hdmi, &msgs[i]);
745 else
746 ret = inno_hdmi_i2c_write(hdmi, &msgs[i]);
747
748 if (ret < 0)
749 break;
750 }
751
752 if (!ret)
753 ret = num;
754
755 /* Mute HDMI EDID interrupt */
756 hdmi_writeb(hdmi, HDMI_INTERRUPT_MASK1, 0);
757
758 mutex_unlock(&i2c->lock);
759
760 return ret;
761}
762
763static u32 inno_hdmi_i2c_func(struct i2c_adapter *adapter)
764{
765 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
766}
767
768static const struct i2c_algorithm inno_hdmi_algorithm = {
769 .master_xfer = inno_hdmi_i2c_xfer,
770 .functionality = inno_hdmi_i2c_func,
771};
772
773static struct i2c_adapter *inno_hdmi_i2c_adapter(struct inno_hdmi *hdmi)
774{
775 struct i2c_adapter *adap;
776 struct inno_hdmi_i2c *i2c;
777 int ret;
778
779 i2c = devm_kzalloc(hdmi->dev, sizeof(*i2c), GFP_KERNEL);
780 if (!i2c)
781 return ERR_PTR(-ENOMEM);
782
783 mutex_init(&i2c->lock);
784 init_completion(&i2c->cmp);
785
786 adap = &i2c->adap;
787 adap->class = I2C_CLASS_DDC;
788 adap->owner = THIS_MODULE;
789 adap->dev.parent = hdmi->dev;
790 adap->dev.of_node = hdmi->dev->of_node;
791 adap->algo = &inno_hdmi_algorithm;
792 strlcpy(adap->name, "Inno HDMI", sizeof(adap->name));
793 i2c_set_adapdata(adap, hdmi);
794
795 ret = i2c_add_adapter(adap);
796 if (ret) {
797 dev_warn(hdmi->dev, "cannot add %s I2C adapter\n", adap->name);
798 devm_kfree(hdmi->dev, i2c);
799 return ERR_PTR(ret);
800 }
801
802 hdmi->i2c = i2c;
803
804 DRM_DEV_INFO(hdmi->dev, "registered %s I2C bus driver\n", adap->name);
805
806 return adap;
807}
808
809static int inno_hdmi_bind(struct device *dev, struct device *master,
810 void *data)
811{
812 struct platform_device *pdev = to_platform_device(dev);
813 struct drm_device *drm = data;
814 struct inno_hdmi *hdmi;
815 struct resource *iores;
816 int irq;
817 int ret;
818
819 hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL);
820 if (!hdmi)
821 return -ENOMEM;
822
823 hdmi->dev = dev;
824 hdmi->drm_dev = drm;
825
826 iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
827 hdmi->regs = devm_ioremap_resource(dev, iores);
828 if (IS_ERR(hdmi->regs))
829 return PTR_ERR(hdmi->regs);
830
831 hdmi->pclk = devm_clk_get(hdmi->dev, "pclk");
832 if (IS_ERR(hdmi->pclk)) {
833 DRM_DEV_ERROR(hdmi->dev, "Unable to get HDMI pclk clk\n");
834 return PTR_ERR(hdmi->pclk);
835 }
836
837 ret = clk_prepare_enable(hdmi->pclk);
838 if (ret) {
839 DRM_DEV_ERROR(hdmi->dev,
840 "Cannot enable HDMI pclk clock: %d\n", ret);
841 return ret;
842 }
843
844 irq = platform_get_irq(pdev, 0);
845 if (irq < 0) {
846 ret = irq;
847 goto err_disable_clk;
848 }
849
850 inno_hdmi_reset(hdmi);
851
852 hdmi->ddc = inno_hdmi_i2c_adapter(hdmi);
853 if (IS_ERR(hdmi->ddc)) {
854 ret = PTR_ERR(hdmi->ddc);
855 hdmi->ddc = NULL;
856 goto err_disable_clk;
857 }
858
859 /*
860 * When IP controller haven't configured to an accurate video
861 * timing, then the TMDS clock source would be switched to
862 * PCLK_HDMI, so we need to init the TMDS rate to PCLK rate,
863 * and reconfigure the DDC clock.
864 */
865 hdmi->tmds_rate = clk_get_rate(hdmi->pclk);
866 inno_hdmi_i2c_init(hdmi);
867
868 ret = inno_hdmi_register(drm, hdmi);
869 if (ret)
870 goto err_put_adapter;
871
872 dev_set_drvdata(dev, hdmi);
873
874 /* Unmute hotplug interrupt */
875 hdmi_modb(hdmi, HDMI_STATUS, m_MASK_INT_HOTPLUG, v_MASK_INT_HOTPLUG(1));
876
877 ret = devm_request_threaded_irq(dev, irq, inno_hdmi_hardirq,
878 inno_hdmi_irq, IRQF_SHARED,
879 dev_name(dev), hdmi);
880 if (ret < 0)
881 goto err_cleanup_hdmi;
882
883 return 0;
884err_cleanup_hdmi:
885 hdmi->connector.funcs->destroy(&hdmi->connector);
886 hdmi->encoder.funcs->destroy(&hdmi->encoder);
887err_put_adapter:
888 i2c_put_adapter(hdmi->ddc);
889err_disable_clk:
890 clk_disable_unprepare(hdmi->pclk);
891 return ret;
892}
893
894static void inno_hdmi_unbind(struct device *dev, struct device *master,
895 void *data)
896{
897 struct inno_hdmi *hdmi = dev_get_drvdata(dev);
898
899 hdmi->connector.funcs->destroy(&hdmi->connector);
900 hdmi->encoder.funcs->destroy(&hdmi->encoder);
901
902 i2c_put_adapter(hdmi->ddc);
903 clk_disable_unprepare(hdmi->pclk);
904}
905
906static const struct component_ops inno_hdmi_ops = {
907 .bind = inno_hdmi_bind,
908 .unbind = inno_hdmi_unbind,
909};
910
911static int inno_hdmi_probe(struct platform_device *pdev)
912{
913 return component_add(&pdev->dev, &inno_hdmi_ops);
914}
915
916static int inno_hdmi_remove(struct platform_device *pdev)
917{
918 component_del(&pdev->dev, &inno_hdmi_ops);
919
920 return 0;
921}
922
923static const struct of_device_id inno_hdmi_dt_ids[] = {
924 { .compatible = "rockchip,rk3036-inno-hdmi",
925 },
926 {},
927};
928MODULE_DEVICE_TABLE(of, inno_hdmi_dt_ids);
929
930struct platform_driver inno_hdmi_driver = {
931 .probe = inno_hdmi_probe,
932 .remove = inno_hdmi_remove,
933 .driver = {
934 .name = "innohdmi-rockchip",
935 .of_match_table = inno_hdmi_dt_ids,
936 },
937};