Loading...
Note: File does not exist in v3.1.
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#include <drm/drm_simple_kms_helper.h>
23
24#include "rockchip_drm_drv.h"
25#include "rockchip_drm_vop.h"
26
27#include "inno_hdmi.h"
28
29struct hdmi_data_info {
30 int vic;
31 bool sink_has_audio;
32 unsigned int enc_in_format;
33 unsigned int enc_out_format;
34 unsigned int colorimetry;
35};
36
37struct inno_hdmi_i2c {
38 struct i2c_adapter adap;
39
40 u8 ddc_addr;
41 u8 segment_addr;
42
43 struct mutex lock;
44 struct completion cmp;
45};
46
47struct inno_hdmi {
48 struct device *dev;
49 struct drm_device *drm_dev;
50
51 int irq;
52 struct clk *pclk;
53 void __iomem *regs;
54
55 struct drm_connector connector;
56 struct rockchip_encoder encoder;
57
58 struct inno_hdmi_i2c *i2c;
59 struct i2c_adapter *ddc;
60
61 unsigned int tmds_rate;
62
63 struct hdmi_data_info hdmi_data;
64 struct drm_display_mode previous_mode;
65};
66
67static struct inno_hdmi *encoder_to_inno_hdmi(struct drm_encoder *encoder)
68{
69 struct rockchip_encoder *rkencoder = to_rockchip_encoder(encoder);
70
71 return container_of(rkencoder, struct inno_hdmi, encoder);
72}
73
74static struct inno_hdmi *connector_to_inno_hdmi(struct drm_connector *connector)
75{
76 return container_of(connector, struct inno_hdmi, connector);
77}
78
79enum {
80 CSC_ITU601_16_235_TO_RGB_0_255_8BIT,
81 CSC_ITU601_0_255_TO_RGB_0_255_8BIT,
82 CSC_ITU709_16_235_TO_RGB_0_255_8BIT,
83 CSC_RGB_0_255_TO_ITU601_16_235_8BIT,
84 CSC_RGB_0_255_TO_ITU709_16_235_8BIT,
85 CSC_RGB_0_255_TO_RGB_16_235_8BIT,
86};
87
88static const char coeff_csc[][24] = {
89 /*
90 * YUV2RGB:601 SD mode(Y[16:235], UV[16:240], RGB[0:255]):
91 * R = 1.164*Y + 1.596*V - 204
92 * G = 1.164*Y - 0.391*U - 0.813*V + 154
93 * B = 1.164*Y + 2.018*U - 258
94 */
95 {
96 0x04, 0xa7, 0x00, 0x00, 0x06, 0x62, 0x02, 0xcc,
97 0x04, 0xa7, 0x11, 0x90, 0x13, 0x40, 0x00, 0x9a,
98 0x04, 0xa7, 0x08, 0x12, 0x00, 0x00, 0x03, 0x02
99 },
100 /*
101 * YUV2RGB:601 SD mode(YUV[0:255],RGB[0:255]):
102 * R = Y + 1.402*V - 248
103 * G = Y - 0.344*U - 0.714*V + 135
104 * B = Y + 1.772*U - 227
105 */
106 {
107 0x04, 0x00, 0x00, 0x00, 0x05, 0x9b, 0x02, 0xf8,
108 0x04, 0x00, 0x11, 0x60, 0x12, 0xdb, 0x00, 0x87,
109 0x04, 0x00, 0x07, 0x16, 0x00, 0x00, 0x02, 0xe3
110 },
111 /*
112 * YUV2RGB:709 HD mode(Y[16:235],UV[16:240],RGB[0:255]):
113 * R = 1.164*Y + 1.793*V - 248
114 * G = 1.164*Y - 0.213*U - 0.534*V + 77
115 * B = 1.164*Y + 2.115*U - 289
116 */
117 {
118 0x04, 0xa7, 0x00, 0x00, 0x07, 0x2c, 0x02, 0xf8,
119 0x04, 0xa7, 0x10, 0xda, 0x12, 0x22, 0x00, 0x4d,
120 0x04, 0xa7, 0x08, 0x74, 0x00, 0x00, 0x03, 0x21
121 },
122
123 /*
124 * RGB2YUV:601 SD mode:
125 * Cb = -0.291G - 0.148R + 0.439B + 128
126 * Y = 0.504G + 0.257R + 0.098B + 16
127 * Cr = -0.368G + 0.439R - 0.071B + 128
128 */
129 {
130 0x11, 0x5f, 0x01, 0x82, 0x10, 0x23, 0x00, 0x80,
131 0x02, 0x1c, 0x00, 0xa1, 0x00, 0x36, 0x00, 0x1e,
132 0x11, 0x29, 0x10, 0x59, 0x01, 0x82, 0x00, 0x80
133 },
134 /*
135 * RGB2YUV:709 HD mode:
136 * Cb = - 0.338G - 0.101R + 0.439B + 128
137 * Y = 0.614G + 0.183R + 0.062B + 16
138 * Cr = - 0.399G + 0.439R - 0.040B + 128
139 */
140 {
141 0x11, 0x98, 0x01, 0xc1, 0x10, 0x28, 0x00, 0x80,
142 0x02, 0x74, 0x00, 0xbb, 0x00, 0x3f, 0x00, 0x10,
143 0x11, 0x5a, 0x10, 0x67, 0x01, 0xc1, 0x00, 0x80
144 },
145 /*
146 * RGB[0:255]2RGB[16:235]:
147 * R' = R x (235-16)/255 + 16;
148 * G' = G x (235-16)/255 + 16;
149 * B' = B x (235-16)/255 + 16;
150 */
151 {
152 0x00, 0x00, 0x03, 0x6F, 0x00, 0x00, 0x00, 0x10,
153 0x03, 0x6F, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10,
154 0x00, 0x00, 0x00, 0x00, 0x03, 0x6F, 0x00, 0x10
155 },
156};
157
158static inline u8 hdmi_readb(struct inno_hdmi *hdmi, u16 offset)
159{
160 return readl_relaxed(hdmi->regs + (offset) * 0x04);
161}
162
163static inline void hdmi_writeb(struct inno_hdmi *hdmi, u16 offset, u32 val)
164{
165 writel_relaxed(val, hdmi->regs + (offset) * 0x04);
166}
167
168static inline void hdmi_modb(struct inno_hdmi *hdmi, u16 offset,
169 u32 msk, u32 val)
170{
171 u8 temp = hdmi_readb(hdmi, offset) & ~msk;
172
173 temp |= val & msk;
174 hdmi_writeb(hdmi, offset, temp);
175}
176
177static void inno_hdmi_i2c_init(struct inno_hdmi *hdmi)
178{
179 int ddc_bus_freq;
180
181 ddc_bus_freq = (hdmi->tmds_rate >> 2) / HDMI_SCL_RATE;
182
183 hdmi_writeb(hdmi, DDC_BUS_FREQ_L, ddc_bus_freq & 0xFF);
184 hdmi_writeb(hdmi, DDC_BUS_FREQ_H, (ddc_bus_freq >> 8) & 0xFF);
185
186 /* Clear the EDID interrupt flag and mute the interrupt */
187 hdmi_writeb(hdmi, HDMI_INTERRUPT_MASK1, 0);
188 hdmi_writeb(hdmi, HDMI_INTERRUPT_STATUS1, m_INT_EDID_READY);
189}
190
191static void inno_hdmi_sys_power(struct inno_hdmi *hdmi, bool enable)
192{
193 if (enable)
194 hdmi_modb(hdmi, HDMI_SYS_CTRL, m_POWER, v_PWR_ON);
195 else
196 hdmi_modb(hdmi, HDMI_SYS_CTRL, m_POWER, v_PWR_OFF);
197}
198
199static void inno_hdmi_set_pwr_mode(struct inno_hdmi *hdmi, int mode)
200{
201 switch (mode) {
202 case NORMAL:
203 inno_hdmi_sys_power(hdmi, false);
204
205 hdmi_writeb(hdmi, HDMI_PHY_PRE_EMPHASIS, 0x6f);
206 hdmi_writeb(hdmi, HDMI_PHY_DRIVER, 0xbb);
207
208 hdmi_writeb(hdmi, HDMI_PHY_SYS_CTL, 0x15);
209 hdmi_writeb(hdmi, HDMI_PHY_SYS_CTL, 0x14);
210 hdmi_writeb(hdmi, HDMI_PHY_SYS_CTL, 0x10);
211 hdmi_writeb(hdmi, HDMI_PHY_CHG_PWR, 0x0f);
212 hdmi_writeb(hdmi, HDMI_PHY_SYNC, 0x00);
213 hdmi_writeb(hdmi, HDMI_PHY_SYNC, 0x01);
214
215 inno_hdmi_sys_power(hdmi, true);
216 break;
217
218 case LOWER_PWR:
219 inno_hdmi_sys_power(hdmi, false);
220 hdmi_writeb(hdmi, HDMI_PHY_DRIVER, 0x00);
221 hdmi_writeb(hdmi, HDMI_PHY_PRE_EMPHASIS, 0x00);
222 hdmi_writeb(hdmi, HDMI_PHY_CHG_PWR, 0x00);
223 hdmi_writeb(hdmi, HDMI_PHY_SYS_CTL, 0x15);
224
225 break;
226
227 default:
228 DRM_DEV_ERROR(hdmi->dev, "Unknown power mode %d\n", mode);
229 }
230}
231
232static void inno_hdmi_reset(struct inno_hdmi *hdmi)
233{
234 u32 val;
235 u32 msk;
236
237 hdmi_modb(hdmi, HDMI_SYS_CTRL, m_RST_DIGITAL, v_NOT_RST_DIGITAL);
238 udelay(100);
239
240 hdmi_modb(hdmi, HDMI_SYS_CTRL, m_RST_ANALOG, v_NOT_RST_ANALOG);
241 udelay(100);
242
243 msk = m_REG_CLK_INV | m_REG_CLK_SOURCE | m_POWER | m_INT_POL;
244 val = v_REG_CLK_INV | v_REG_CLK_SOURCE_SYS | v_PWR_ON | v_INT_POL_HIGH;
245 hdmi_modb(hdmi, HDMI_SYS_CTRL, msk, val);
246
247 inno_hdmi_set_pwr_mode(hdmi, NORMAL);
248}
249
250static int inno_hdmi_upload_frame(struct inno_hdmi *hdmi, int setup_rc,
251 union hdmi_infoframe *frame, u32 frame_index,
252 u32 mask, u32 disable, u32 enable)
253{
254 if (mask)
255 hdmi_modb(hdmi, HDMI_PACKET_SEND_AUTO, mask, disable);
256
257 hdmi_writeb(hdmi, HDMI_CONTROL_PACKET_BUF_INDEX, frame_index);
258
259 if (setup_rc >= 0) {
260 u8 packed_frame[HDMI_MAXIMUM_INFO_FRAME_SIZE];
261 ssize_t rc, i;
262
263 rc = hdmi_infoframe_pack(frame, packed_frame,
264 sizeof(packed_frame));
265 if (rc < 0)
266 return rc;
267
268 for (i = 0; i < rc; i++)
269 hdmi_writeb(hdmi, HDMI_CONTROL_PACKET_ADDR + i,
270 packed_frame[i]);
271
272 if (mask)
273 hdmi_modb(hdmi, HDMI_PACKET_SEND_AUTO, mask, enable);
274 }
275
276 return setup_rc;
277}
278
279static int inno_hdmi_config_video_vsi(struct inno_hdmi *hdmi,
280 struct drm_display_mode *mode)
281{
282 union hdmi_infoframe frame;
283 int rc;
284
285 rc = drm_hdmi_vendor_infoframe_from_display_mode(&frame.vendor.hdmi,
286 &hdmi->connector,
287 mode);
288
289 return inno_hdmi_upload_frame(hdmi, rc, &frame, INFOFRAME_VSI,
290 m_PACKET_VSI_EN, v_PACKET_VSI_EN(0), v_PACKET_VSI_EN(1));
291}
292
293static int inno_hdmi_config_video_avi(struct inno_hdmi *hdmi,
294 struct drm_display_mode *mode)
295{
296 union hdmi_infoframe frame;
297 int rc;
298
299 rc = drm_hdmi_avi_infoframe_from_display_mode(&frame.avi,
300 &hdmi->connector,
301 mode);
302
303 if (hdmi->hdmi_data.enc_out_format == HDMI_COLORSPACE_YUV444)
304 frame.avi.colorspace = HDMI_COLORSPACE_YUV444;
305 else if (hdmi->hdmi_data.enc_out_format == HDMI_COLORSPACE_YUV422)
306 frame.avi.colorspace = HDMI_COLORSPACE_YUV422;
307 else
308 frame.avi.colorspace = HDMI_COLORSPACE_RGB;
309
310 return inno_hdmi_upload_frame(hdmi, rc, &frame, INFOFRAME_AVI, 0, 0, 0);
311}
312
313static int inno_hdmi_config_video_csc(struct inno_hdmi *hdmi)
314{
315 struct hdmi_data_info *data = &hdmi->hdmi_data;
316 int c0_c2_change = 0;
317 int csc_enable = 0;
318 int csc_mode = 0;
319 int auto_csc = 0;
320 int value;
321 int i;
322
323 /* Input video mode is SDR RGB24bit, data enable signal from external */
324 hdmi_writeb(hdmi, HDMI_VIDEO_CONTRL1, v_DE_EXTERNAL |
325 v_VIDEO_INPUT_FORMAT(VIDEO_INPUT_SDR_RGB444));
326
327 /* Input color hardcode to RGB, and output color hardcode to RGB888 */
328 value = v_VIDEO_INPUT_BITS(VIDEO_INPUT_8BITS) |
329 v_VIDEO_OUTPUT_COLOR(0) |
330 v_VIDEO_INPUT_CSP(0);
331 hdmi_writeb(hdmi, HDMI_VIDEO_CONTRL2, value);
332
333 if (data->enc_in_format == data->enc_out_format) {
334 if ((data->enc_in_format == HDMI_COLORSPACE_RGB) ||
335 (data->enc_in_format >= HDMI_COLORSPACE_YUV444)) {
336 value = v_SOF_DISABLE | v_COLOR_DEPTH_NOT_INDICATED(1);
337 hdmi_writeb(hdmi, HDMI_VIDEO_CONTRL3, value);
338
339 hdmi_modb(hdmi, HDMI_VIDEO_CONTRL,
340 m_VIDEO_AUTO_CSC | m_VIDEO_C0_C2_SWAP,
341 v_VIDEO_AUTO_CSC(AUTO_CSC_DISABLE) |
342 v_VIDEO_C0_C2_SWAP(C0_C2_CHANGE_DISABLE));
343 return 0;
344 }
345 }
346
347 if (data->colorimetry == HDMI_COLORIMETRY_ITU_601) {
348 if ((data->enc_in_format == HDMI_COLORSPACE_RGB) &&
349 (data->enc_out_format == HDMI_COLORSPACE_YUV444)) {
350 csc_mode = CSC_RGB_0_255_TO_ITU601_16_235_8BIT;
351 auto_csc = AUTO_CSC_DISABLE;
352 c0_c2_change = C0_C2_CHANGE_DISABLE;
353 csc_enable = v_CSC_ENABLE;
354 } else if ((data->enc_in_format == HDMI_COLORSPACE_YUV444) &&
355 (data->enc_out_format == HDMI_COLORSPACE_RGB)) {
356 csc_mode = CSC_ITU601_16_235_TO_RGB_0_255_8BIT;
357 auto_csc = AUTO_CSC_ENABLE;
358 c0_c2_change = C0_C2_CHANGE_DISABLE;
359 csc_enable = v_CSC_DISABLE;
360 }
361 } else {
362 if ((data->enc_in_format == HDMI_COLORSPACE_RGB) &&
363 (data->enc_out_format == HDMI_COLORSPACE_YUV444)) {
364 csc_mode = CSC_RGB_0_255_TO_ITU709_16_235_8BIT;
365 auto_csc = AUTO_CSC_DISABLE;
366 c0_c2_change = C0_C2_CHANGE_DISABLE;
367 csc_enable = v_CSC_ENABLE;
368 } else if ((data->enc_in_format == HDMI_COLORSPACE_YUV444) &&
369 (data->enc_out_format == HDMI_COLORSPACE_RGB)) {
370 csc_mode = CSC_ITU709_16_235_TO_RGB_0_255_8BIT;
371 auto_csc = AUTO_CSC_ENABLE;
372 c0_c2_change = C0_C2_CHANGE_DISABLE;
373 csc_enable = v_CSC_DISABLE;
374 }
375 }
376
377 for (i = 0; i < 24; i++)
378 hdmi_writeb(hdmi, HDMI_VIDEO_CSC_COEF + i,
379 coeff_csc[csc_mode][i]);
380
381 value = v_SOF_DISABLE | csc_enable | v_COLOR_DEPTH_NOT_INDICATED(1);
382 hdmi_writeb(hdmi, HDMI_VIDEO_CONTRL3, value);
383 hdmi_modb(hdmi, HDMI_VIDEO_CONTRL, m_VIDEO_AUTO_CSC |
384 m_VIDEO_C0_C2_SWAP, v_VIDEO_AUTO_CSC(auto_csc) |
385 v_VIDEO_C0_C2_SWAP(c0_c2_change));
386
387 return 0;
388}
389
390static int inno_hdmi_config_video_timing(struct inno_hdmi *hdmi,
391 struct drm_display_mode *mode)
392{
393 int value;
394
395 /* Set detail external video timing polarity and interlace mode */
396 value = v_EXTERANL_VIDEO(1);
397 value |= mode->flags & DRM_MODE_FLAG_PHSYNC ?
398 v_HSYNC_POLARITY(1) : v_HSYNC_POLARITY(0);
399 value |= mode->flags & DRM_MODE_FLAG_PVSYNC ?
400 v_VSYNC_POLARITY(1) : v_VSYNC_POLARITY(0);
401 value |= mode->flags & DRM_MODE_FLAG_INTERLACE ?
402 v_INETLACE(1) : v_INETLACE(0);
403 hdmi_writeb(hdmi, HDMI_VIDEO_TIMING_CTL, value);
404
405 /* Set detail external video timing */
406 value = mode->htotal;
407 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HTOTAL_L, value & 0xFF);
408 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HTOTAL_H, (value >> 8) & 0xFF);
409
410 value = mode->htotal - mode->hdisplay;
411 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HBLANK_L, value & 0xFF);
412 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HBLANK_H, (value >> 8) & 0xFF);
413
414 value = mode->hsync_start - mode->hdisplay;
415 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HDELAY_L, value & 0xFF);
416 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HDELAY_H, (value >> 8) & 0xFF);
417
418 value = mode->hsync_end - mode->hsync_start;
419 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HDURATION_L, value & 0xFF);
420 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_HDURATION_H, (value >> 8) & 0xFF);
421
422 value = mode->vtotal;
423 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_VTOTAL_L, value & 0xFF);
424 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_VTOTAL_H, (value >> 8) & 0xFF);
425
426 value = mode->vtotal - mode->vdisplay;
427 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_VBLANK, value & 0xFF);
428
429 value = mode->vsync_start - mode->vdisplay;
430 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_VDELAY, value & 0xFF);
431
432 value = mode->vsync_end - mode->vsync_start;
433 hdmi_writeb(hdmi, HDMI_VIDEO_EXT_VDURATION, value & 0xFF);
434
435 hdmi_writeb(hdmi, HDMI_PHY_PRE_DIV_RATIO, 0x1e);
436 hdmi_writeb(hdmi, HDMI_PHY_FEEDBACK_DIV_RATIO_LOW, 0x2c);
437 hdmi_writeb(hdmi, HDMI_PHY_FEEDBACK_DIV_RATIO_HIGH, 0x01);
438
439 return 0;
440}
441
442static int inno_hdmi_setup(struct inno_hdmi *hdmi,
443 struct drm_display_mode *mode)
444{
445 struct drm_display_info *display = &hdmi->connector.display_info;
446
447 hdmi->hdmi_data.vic = drm_match_cea_mode(mode);
448
449 hdmi->hdmi_data.enc_in_format = HDMI_COLORSPACE_RGB;
450 hdmi->hdmi_data.enc_out_format = HDMI_COLORSPACE_RGB;
451
452 if ((hdmi->hdmi_data.vic == 6) || (hdmi->hdmi_data.vic == 7) ||
453 (hdmi->hdmi_data.vic == 21) || (hdmi->hdmi_data.vic == 22) ||
454 (hdmi->hdmi_data.vic == 2) || (hdmi->hdmi_data.vic == 3) ||
455 (hdmi->hdmi_data.vic == 17) || (hdmi->hdmi_data.vic == 18))
456 hdmi->hdmi_data.colorimetry = HDMI_COLORIMETRY_ITU_601;
457 else
458 hdmi->hdmi_data.colorimetry = HDMI_COLORIMETRY_ITU_709;
459
460 /* Mute video and audio output */
461 hdmi_modb(hdmi, HDMI_AV_MUTE, m_AUDIO_MUTE | m_VIDEO_BLACK,
462 v_AUDIO_MUTE(1) | v_VIDEO_MUTE(1));
463
464 /* Set HDMI Mode */
465 hdmi_writeb(hdmi, HDMI_HDCP_CTRL,
466 v_HDMI_DVI(display->is_hdmi));
467
468 inno_hdmi_config_video_timing(hdmi, mode);
469
470 inno_hdmi_config_video_csc(hdmi);
471
472 if (display->is_hdmi) {
473 inno_hdmi_config_video_avi(hdmi, mode);
474 inno_hdmi_config_video_vsi(hdmi, mode);
475 }
476
477 /*
478 * When IP controller have configured to an accurate video
479 * timing, then the TMDS clock source would be switched to
480 * DCLK_LCDC, so we need to init the TMDS rate to mode pixel
481 * clock rate, and reconfigure the DDC clock.
482 */
483 hdmi->tmds_rate = mode->clock * 1000;
484 inno_hdmi_i2c_init(hdmi);
485
486 /* Unmute video and audio output */
487 hdmi_modb(hdmi, HDMI_AV_MUTE, m_AUDIO_MUTE | m_VIDEO_BLACK,
488 v_AUDIO_MUTE(0) | v_VIDEO_MUTE(0));
489
490 return 0;
491}
492
493static void inno_hdmi_encoder_mode_set(struct drm_encoder *encoder,
494 struct drm_display_mode *mode,
495 struct drm_display_mode *adj_mode)
496{
497 struct inno_hdmi *hdmi = encoder_to_inno_hdmi(encoder);
498
499 inno_hdmi_setup(hdmi, adj_mode);
500
501 /* Store the display mode for plugin/DPMS poweron events */
502 drm_mode_copy(&hdmi->previous_mode, adj_mode);
503}
504
505static void inno_hdmi_encoder_enable(struct drm_encoder *encoder)
506{
507 struct inno_hdmi *hdmi = encoder_to_inno_hdmi(encoder);
508
509 inno_hdmi_set_pwr_mode(hdmi, NORMAL);
510}
511
512static void inno_hdmi_encoder_disable(struct drm_encoder *encoder)
513{
514 struct inno_hdmi *hdmi = encoder_to_inno_hdmi(encoder);
515
516 inno_hdmi_set_pwr_mode(hdmi, LOWER_PWR);
517}
518
519static bool inno_hdmi_encoder_mode_fixup(struct drm_encoder *encoder,
520 const struct drm_display_mode *mode,
521 struct drm_display_mode *adj_mode)
522{
523 return true;
524}
525
526static int
527inno_hdmi_encoder_atomic_check(struct drm_encoder *encoder,
528 struct drm_crtc_state *crtc_state,
529 struct drm_connector_state *conn_state)
530{
531 struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
532
533 s->output_mode = ROCKCHIP_OUT_MODE_P888;
534 s->output_type = DRM_MODE_CONNECTOR_HDMIA;
535
536 return 0;
537}
538
539static struct drm_encoder_helper_funcs inno_hdmi_encoder_helper_funcs = {
540 .enable = inno_hdmi_encoder_enable,
541 .disable = inno_hdmi_encoder_disable,
542 .mode_fixup = inno_hdmi_encoder_mode_fixup,
543 .mode_set = inno_hdmi_encoder_mode_set,
544 .atomic_check = inno_hdmi_encoder_atomic_check,
545};
546
547static enum drm_connector_status
548inno_hdmi_connector_detect(struct drm_connector *connector, bool force)
549{
550 struct inno_hdmi *hdmi = connector_to_inno_hdmi(connector);
551
552 return (hdmi_readb(hdmi, HDMI_STATUS) & m_HOTPLUG) ?
553 connector_status_connected : connector_status_disconnected;
554}
555
556static int inno_hdmi_connector_get_modes(struct drm_connector *connector)
557{
558 struct inno_hdmi *hdmi = connector_to_inno_hdmi(connector);
559 struct edid *edid;
560 int ret = 0;
561
562 if (!hdmi->ddc)
563 return 0;
564
565 edid = drm_get_edid(connector, hdmi->ddc);
566 if (edid) {
567 hdmi->hdmi_data.sink_has_audio = drm_detect_monitor_audio(edid);
568 drm_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.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_simple_encoder_init(drm, encoder, DRM_MODE_ENCODER_TMDS);
628
629 hdmi->connector.polled = DRM_CONNECTOR_POLL_HPD;
630
631 drm_connector_helper_add(&hdmi->connector,
632 &inno_hdmi_connector_helper_funcs);
633 drm_connector_init_with_ddc(drm, &hdmi->connector,
634 &inno_hdmi_connector_funcs,
635 DRM_MODE_CONNECTOR_HDMIA,
636 hdmi->ddc);
637
638 drm_connector_attach_encoder(&hdmi->connector, encoder);
639
640 return 0;
641}
642
643static irqreturn_t inno_hdmi_i2c_irq(struct inno_hdmi *hdmi)
644{
645 struct inno_hdmi_i2c *i2c = hdmi->i2c;
646 u8 stat;
647
648 stat = hdmi_readb(hdmi, HDMI_INTERRUPT_STATUS1);
649 if (!(stat & m_INT_EDID_READY))
650 return IRQ_NONE;
651
652 /* Clear HDMI EDID interrupt flag */
653 hdmi_writeb(hdmi, HDMI_INTERRUPT_STATUS1, m_INT_EDID_READY);
654
655 complete(&i2c->cmp);
656
657 return IRQ_HANDLED;
658}
659
660static irqreturn_t inno_hdmi_hardirq(int irq, void *dev_id)
661{
662 struct inno_hdmi *hdmi = dev_id;
663 irqreturn_t ret = IRQ_NONE;
664 u8 interrupt;
665
666 if (hdmi->i2c)
667 ret = inno_hdmi_i2c_irq(hdmi);
668
669 interrupt = hdmi_readb(hdmi, HDMI_STATUS);
670 if (interrupt & m_INT_HOTPLUG) {
671 hdmi_modb(hdmi, HDMI_STATUS, m_INT_HOTPLUG, m_INT_HOTPLUG);
672 ret = IRQ_WAKE_THREAD;
673 }
674
675 return ret;
676}
677
678static irqreturn_t inno_hdmi_irq(int irq, void *dev_id)
679{
680 struct inno_hdmi *hdmi = dev_id;
681
682 drm_helper_hpd_irq_event(hdmi->connector.dev);
683
684 return IRQ_HANDLED;
685}
686
687static int inno_hdmi_i2c_read(struct inno_hdmi *hdmi, struct i2c_msg *msgs)
688{
689 int length = msgs->len;
690 u8 *buf = msgs->buf;
691 int ret;
692
693 ret = wait_for_completion_timeout(&hdmi->i2c->cmp, HZ / 10);
694 if (!ret)
695 return -EAGAIN;
696
697 while (length--)
698 *buf++ = hdmi_readb(hdmi, HDMI_EDID_FIFO_ADDR);
699
700 return 0;
701}
702
703static int inno_hdmi_i2c_write(struct inno_hdmi *hdmi, struct i2c_msg *msgs)
704{
705 /*
706 * The DDC module only support read EDID message, so
707 * we assume that each word write to this i2c adapter
708 * should be the offset of EDID word address.
709 */
710 if ((msgs->len != 1) ||
711 ((msgs->addr != DDC_ADDR) && (msgs->addr != DDC_SEGMENT_ADDR)))
712 return -EINVAL;
713
714 reinit_completion(&hdmi->i2c->cmp);
715
716 if (msgs->addr == DDC_SEGMENT_ADDR)
717 hdmi->i2c->segment_addr = msgs->buf[0];
718 if (msgs->addr == DDC_ADDR)
719 hdmi->i2c->ddc_addr = msgs->buf[0];
720
721 /* Set edid fifo first addr */
722 hdmi_writeb(hdmi, HDMI_EDID_FIFO_OFFSET, 0x00);
723
724 /* Set edid word address 0x00/0x80 */
725 hdmi_writeb(hdmi, HDMI_EDID_WORD_ADDR, hdmi->i2c->ddc_addr);
726
727 /* Set edid segment pointer */
728 hdmi_writeb(hdmi, HDMI_EDID_SEGMENT_POINTER, hdmi->i2c->segment_addr);
729
730 return 0;
731}
732
733static int inno_hdmi_i2c_xfer(struct i2c_adapter *adap,
734 struct i2c_msg *msgs, int num)
735{
736 struct inno_hdmi *hdmi = i2c_get_adapdata(adap);
737 struct inno_hdmi_i2c *i2c = hdmi->i2c;
738 int i, ret = 0;
739
740 mutex_lock(&i2c->lock);
741
742 /* Clear the EDID interrupt flag and unmute the interrupt */
743 hdmi_writeb(hdmi, HDMI_INTERRUPT_MASK1, m_INT_EDID_READY);
744 hdmi_writeb(hdmi, HDMI_INTERRUPT_STATUS1, m_INT_EDID_READY);
745
746 for (i = 0; i < num; i++) {
747 DRM_DEV_DEBUG(hdmi->dev,
748 "xfer: num: %d/%d, len: %d, flags: %#x\n",
749 i + 1, num, msgs[i].len, msgs[i].flags);
750
751 if (msgs[i].flags & I2C_M_RD)
752 ret = inno_hdmi_i2c_read(hdmi, &msgs[i]);
753 else
754 ret = inno_hdmi_i2c_write(hdmi, &msgs[i]);
755
756 if (ret < 0)
757 break;
758 }
759
760 if (!ret)
761 ret = num;
762
763 /* Mute HDMI EDID interrupt */
764 hdmi_writeb(hdmi, HDMI_INTERRUPT_MASK1, 0);
765
766 mutex_unlock(&i2c->lock);
767
768 return ret;
769}
770
771static u32 inno_hdmi_i2c_func(struct i2c_adapter *adapter)
772{
773 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
774}
775
776static const struct i2c_algorithm inno_hdmi_algorithm = {
777 .master_xfer = inno_hdmi_i2c_xfer,
778 .functionality = inno_hdmi_i2c_func,
779};
780
781static struct i2c_adapter *inno_hdmi_i2c_adapter(struct inno_hdmi *hdmi)
782{
783 struct i2c_adapter *adap;
784 struct inno_hdmi_i2c *i2c;
785 int ret;
786
787 i2c = devm_kzalloc(hdmi->dev, sizeof(*i2c), GFP_KERNEL);
788 if (!i2c)
789 return ERR_PTR(-ENOMEM);
790
791 mutex_init(&i2c->lock);
792 init_completion(&i2c->cmp);
793
794 adap = &i2c->adap;
795 adap->class = I2C_CLASS_DDC;
796 adap->owner = THIS_MODULE;
797 adap->dev.parent = hdmi->dev;
798 adap->dev.of_node = hdmi->dev->of_node;
799 adap->algo = &inno_hdmi_algorithm;
800 strlcpy(adap->name, "Inno HDMI", sizeof(adap->name));
801 i2c_set_adapdata(adap, hdmi);
802
803 ret = i2c_add_adapter(adap);
804 if (ret) {
805 dev_warn(hdmi->dev, "cannot add %s I2C adapter\n", adap->name);
806 devm_kfree(hdmi->dev, i2c);
807 return ERR_PTR(ret);
808 }
809
810 hdmi->i2c = i2c;
811
812 DRM_DEV_INFO(hdmi->dev, "registered %s I2C bus driver\n", adap->name);
813
814 return adap;
815}
816
817static int inno_hdmi_bind(struct device *dev, struct device *master,
818 void *data)
819{
820 struct platform_device *pdev = to_platform_device(dev);
821 struct drm_device *drm = data;
822 struct inno_hdmi *hdmi;
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 hdmi->regs = devm_platform_ioremap_resource(pdev, 0);
834 if (IS_ERR(hdmi->regs))
835 return PTR_ERR(hdmi->regs);
836
837 hdmi->pclk = devm_clk_get(hdmi->dev, "pclk");
838 if (IS_ERR(hdmi->pclk)) {
839 DRM_DEV_ERROR(hdmi->dev, "Unable to get HDMI pclk clk\n");
840 return PTR_ERR(hdmi->pclk);
841 }
842
843 ret = clk_prepare_enable(hdmi->pclk);
844 if (ret) {
845 DRM_DEV_ERROR(hdmi->dev,
846 "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 ret = irq;
853 goto err_disable_clk;
854 }
855
856 inno_hdmi_reset(hdmi);
857
858 hdmi->ddc = inno_hdmi_i2c_adapter(hdmi);
859 if (IS_ERR(hdmi->ddc)) {
860 ret = PTR_ERR(hdmi->ddc);
861 hdmi->ddc = NULL;
862 goto err_disable_clk;
863 }
864
865 /*
866 * When IP controller haven't configured to an accurate video
867 * timing, then the TMDS clock source would be switched to
868 * PCLK_HDMI, so we need to init the TMDS rate to PCLK rate,
869 * and reconfigure the DDC clock.
870 */
871 hdmi->tmds_rate = clk_get_rate(hdmi->pclk);
872 inno_hdmi_i2c_init(hdmi);
873
874 ret = inno_hdmi_register(drm, hdmi);
875 if (ret)
876 goto err_put_adapter;
877
878 dev_set_drvdata(dev, hdmi);
879
880 /* Unmute hotplug interrupt */
881 hdmi_modb(hdmi, HDMI_STATUS, m_MASK_INT_HOTPLUG, v_MASK_INT_HOTPLUG(1));
882
883 ret = devm_request_threaded_irq(dev, irq, inno_hdmi_hardirq,
884 inno_hdmi_irq, IRQF_SHARED,
885 dev_name(dev), hdmi);
886 if (ret < 0)
887 goto err_cleanup_hdmi;
888
889 return 0;
890err_cleanup_hdmi:
891 hdmi->connector.funcs->destroy(&hdmi->connector);
892 hdmi->encoder.encoder.funcs->destroy(&hdmi->encoder.encoder);
893err_put_adapter:
894 i2c_put_adapter(hdmi->ddc);
895err_disable_clk:
896 clk_disable_unprepare(hdmi->pclk);
897 return ret;
898}
899
900static void inno_hdmi_unbind(struct device *dev, struct device *master,
901 void *data)
902{
903 struct inno_hdmi *hdmi = dev_get_drvdata(dev);
904
905 hdmi->connector.funcs->destroy(&hdmi->connector);
906 hdmi->encoder.encoder.funcs->destroy(&hdmi->encoder.encoder);
907
908 i2c_put_adapter(hdmi->ddc);
909 clk_disable_unprepare(hdmi->pclk);
910}
911
912static const struct component_ops inno_hdmi_ops = {
913 .bind = inno_hdmi_bind,
914 .unbind = inno_hdmi_unbind,
915};
916
917static int inno_hdmi_probe(struct platform_device *pdev)
918{
919 return component_add(&pdev->dev, &inno_hdmi_ops);
920}
921
922static int inno_hdmi_remove(struct platform_device *pdev)
923{
924 component_del(&pdev->dev, &inno_hdmi_ops);
925
926 return 0;
927}
928
929static const struct of_device_id inno_hdmi_dt_ids[] = {
930 { .compatible = "rockchip,rk3036-inno-hdmi",
931 },
932 {},
933};
934MODULE_DEVICE_TABLE(of, inno_hdmi_dt_ids);
935
936struct platform_driver inno_hdmi_driver = {
937 .probe = inno_hdmi_probe,
938 .remove = inno_hdmi_remove,
939 .driver = {
940 .name = "innohdmi-rockchip",
941 .of_match_table = inno_hdmi_dt_ids,
942 },
943};