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