1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
4 * Zheng Yang <zhengyang@rock-chips.com>
5 */
6
7#include <drm/drm_atomic.h>
8#include <drm/drm_edid.h>
9#include <drm/drm_of.h>
10#include <drm/drm_probe_helper.h>
11#include <drm/drm_simple_kms_helper.h>
12
13#include <linux/clk.h>
14#include <linux/mfd/syscon.h>
15#include <linux/platform_device.h>
16#include <linux/regmap.h>
17
18#include "rk3066_hdmi.h"
19
20#include "rockchip_drm_drv.h"
21
22#define DEFAULT_PLLA_RATE 30000000
23
24struct hdmi_data_info {
25 int vic; /* The CEA Video ID (VIC) of the current drm display mode. */
26 unsigned int enc_out_format;
27 unsigned int colorimetry;
28};
29
30struct rk3066_hdmi_i2c {
31 struct i2c_adapter adap;
32
33 u8 ddc_addr;
34 u8 segment_addr;
35 u8 stat;
36
37 struct mutex i2c_lock; /* For i2c operation. */
38 struct completion cmpltn;
39};
40
41struct rk3066_hdmi {
42 struct device *dev;
43 struct drm_device *drm_dev;
44 struct regmap *grf_regmap;
45 int irq;
46 struct clk *hclk;
47 void __iomem *regs;
48
49 struct drm_connector connector;
50 struct rockchip_encoder encoder;
51
52 struct rk3066_hdmi_i2c *i2c;
53 struct i2c_adapter *ddc;
54
55 unsigned int tmdsclk;
56
57 struct hdmi_data_info hdmi_data;
58};
59
60static struct rk3066_hdmi *encoder_to_rk3066_hdmi(struct drm_encoder *encoder)
61{
62 struct rockchip_encoder *rkencoder = to_rockchip_encoder(encoder);
63
64 return container_of(rkencoder, struct rk3066_hdmi, encoder);
65}
66
67static struct rk3066_hdmi *connector_to_rk3066_hdmi(struct drm_connector *connector)
68{
69 return container_of(connector, struct rk3066_hdmi, connector);
70}
71
72static inline u8 hdmi_readb(struct rk3066_hdmi *hdmi, u16 offset)
73{
74 return readl_relaxed(hdmi->regs + offset);
75}
76
77static inline void hdmi_writeb(struct rk3066_hdmi *hdmi, u16 offset, u32 val)
78{
79 writel_relaxed(val, hdmi->regs + offset);
80}
81
82static inline void hdmi_modb(struct rk3066_hdmi *hdmi, u16 offset,
83 u32 msk, u32 val)
84{
85 u8 temp = hdmi_readb(hdmi, offset) & ~msk;
86
87 temp |= val & msk;
88 hdmi_writeb(hdmi, offset, val: temp);
89}
90
91static void rk3066_hdmi_i2c_init(struct rk3066_hdmi *hdmi)
92{
93 int ddc_bus_freq;
94
95 ddc_bus_freq = (hdmi->tmdsclk >> 2) / HDMI_SCL_RATE;
96
97 hdmi_writeb(hdmi, HDMI_DDC_BUS_FREQ_L, val: ddc_bus_freq & 0xFF);
98 hdmi_writeb(hdmi, HDMI_DDC_BUS_FREQ_H, val: (ddc_bus_freq >> 8) & 0xFF);
99
100 /* Clear the EDID interrupt flag and mute the interrupt. */
101 hdmi_modb(hdmi, HDMI_INTR_MASK1, msk: HDMI_INTR_EDID_MASK, val: 0);
102 hdmi_writeb(hdmi, HDMI_INTR_STATUS1, val: HDMI_INTR_EDID_MASK);
103}
104
105static inline u8 rk3066_hdmi_get_power_mode(struct rk3066_hdmi *hdmi)
106{
107 return hdmi_readb(hdmi, HDMI_SYS_CTRL) & HDMI_SYS_POWER_MODE_MASK;
108}
109
110static void rk3066_hdmi_set_power_mode(struct rk3066_hdmi *hdmi, int mode)
111{
112 u8 current_mode, next_mode;
113 u8 i = 0;
114
115 current_mode = rk3066_hdmi_get_power_mode(hdmi);
116
117 DRM_DEV_DEBUG(hdmi->dev, "mode :%d\n", mode);
118 DRM_DEV_DEBUG(hdmi->dev, "current_mode :%d\n", current_mode);
119
120 if (current_mode == mode)
121 return;
122
123 do {
124 if (current_mode > mode) {
125 next_mode = current_mode / 2;
126 } else {
127 if (current_mode < HDMI_SYS_POWER_MODE_A)
128 next_mode = HDMI_SYS_POWER_MODE_A;
129 else
130 next_mode = current_mode * 2;
131 }
132
133 DRM_DEV_DEBUG(hdmi->dev, "%d: next_mode :%d\n", i, next_mode);
134
135 if (next_mode != HDMI_SYS_POWER_MODE_D) {
136 hdmi_modb(hdmi, HDMI_SYS_CTRL,
137 msk: HDMI_SYS_POWER_MODE_MASK, val: next_mode);
138 } else {
139 hdmi_writeb(hdmi, HDMI_SYS_CTRL,
140 val: HDMI_SYS_POWER_MODE_D |
141 HDMI_SYS_PLL_RESET_MASK);
142 usleep_range(min: 90, max: 100);
143 hdmi_writeb(hdmi, HDMI_SYS_CTRL,
144 val: HDMI_SYS_POWER_MODE_D |
145 HDMI_SYS_PLLB_RESET);
146 usleep_range(min: 90, max: 100);
147 hdmi_writeb(hdmi, HDMI_SYS_CTRL,
148 val: HDMI_SYS_POWER_MODE_D);
149 }
150 current_mode = next_mode;
151 i = i + 1;
152 } while ((next_mode != mode) && (i < 5));
153
154 /*
155 * When the IP controller isn't configured with accurate video timing,
156 * DDC_CLK should be equal to the PLLA frequency, which is 30MHz,
157 * so we need to init the TMDS rate to the PCLK rate and reconfigure
158 * the DDC clock.
159 */
160 if (mode < HDMI_SYS_POWER_MODE_D)
161 hdmi->tmdsclk = DEFAULT_PLLA_RATE;
162}
163
164static int
165rk3066_hdmi_upload_frame(struct rk3066_hdmi *hdmi, int setup_rc,
166 union hdmi_infoframe *frame, u32 frame_index,
167 u32 mask, u32 disable, u32 enable)
168{
169 if (mask)
170 hdmi_modb(hdmi, HDMI_CP_AUTO_SEND_CTRL, msk: mask, val: disable);
171
172 hdmi_writeb(hdmi, HDMI_CP_BUF_INDEX, val: frame_index);
173
174 if (setup_rc >= 0) {
175 u8 packed_frame[HDMI_MAXIMUM_INFO_FRAME_SIZE];
176 ssize_t rc, i;
177
178 rc = hdmi_infoframe_pack(frame, buffer: packed_frame,
179 size: sizeof(packed_frame));
180 if (rc < 0)
181 return rc;
182
183 for (i = 0; i < rc; i++)
184 hdmi_writeb(hdmi, HDMI_CP_BUF_ACC_HB0 + i * 4,
185 val: packed_frame[i]);
186
187 if (mask)
188 hdmi_modb(hdmi, HDMI_CP_AUTO_SEND_CTRL, msk: mask, val: enable);
189 }
190
191 return setup_rc;
192}
193
194static int rk3066_hdmi_config_avi(struct rk3066_hdmi *hdmi,
195 struct drm_display_mode *mode)
196{
197 union hdmi_infoframe frame;
198 int rc;
199
200 rc = drm_hdmi_avi_infoframe_from_display_mode(frame: &frame.avi,
201 connector: &hdmi->connector, mode);
202
203 if (hdmi->hdmi_data.enc_out_format == HDMI_COLORSPACE_YUV444)
204 frame.avi.colorspace = HDMI_COLORSPACE_YUV444;
205 else if (hdmi->hdmi_data.enc_out_format == HDMI_COLORSPACE_YUV422)
206 frame.avi.colorspace = HDMI_COLORSPACE_YUV422;
207 else
208 frame.avi.colorspace = HDMI_COLORSPACE_RGB;
209
210 frame.avi.colorimetry = hdmi->hdmi_data.colorimetry;
211 frame.avi.scan_mode = HDMI_SCAN_MODE_NONE;
212
213 return rk3066_hdmi_upload_frame(hdmi, setup_rc: rc, frame: &frame,
214 frame_index: HDMI_INFOFRAME_AVI, mask: 0, disable: 0, enable: 0);
215}
216
217static int rk3066_hdmi_config_video_timing(struct rk3066_hdmi *hdmi,
218 struct drm_display_mode *mode)
219{
220 int value, vsync_offset;
221
222 /* Set the details for the external polarity and interlace mode. */
223 value = HDMI_EXT_VIDEO_SET_EN;
224 value |= mode->flags & DRM_MODE_FLAG_PHSYNC ?
225 HDMI_VIDEO_HSYNC_ACTIVE_HIGH : HDMI_VIDEO_HSYNC_ACTIVE_LOW;
226 value |= mode->flags & DRM_MODE_FLAG_PVSYNC ?
227 HDMI_VIDEO_VSYNC_ACTIVE_HIGH : HDMI_VIDEO_VSYNC_ACTIVE_LOW;
228 value |= mode->flags & DRM_MODE_FLAG_INTERLACE ?
229 HDMI_VIDEO_MODE_INTERLACE : HDMI_VIDEO_MODE_PROGRESSIVE;
230
231 if (hdmi->hdmi_data.vic == 2 || hdmi->hdmi_data.vic == 3)
232 vsync_offset = 6;
233 else
234 vsync_offset = 0;
235
236 value |= vsync_offset << HDMI_VIDEO_VSYNC_OFFSET_SHIFT;
237 hdmi_writeb(hdmi, HDMI_EXT_VIDEO_PARA, val: value);
238
239 /* Set the details for the external video timing. */
240 value = mode->htotal;
241 hdmi_writeb(hdmi, HDMI_EXT_HTOTAL_L, val: value & 0xFF);
242 hdmi_writeb(hdmi, HDMI_EXT_HTOTAL_H, val: (value >> 8) & 0xFF);
243
244 value = mode->htotal - mode->hdisplay;
245 hdmi_writeb(hdmi, HDMI_EXT_HBLANK_L, val: value & 0xFF);
246 hdmi_writeb(hdmi, HDMI_EXT_HBLANK_H, val: (value >> 8) & 0xFF);
247
248 value = mode->htotal - mode->hsync_start;
249 hdmi_writeb(hdmi, HDMI_EXT_HDELAY_L, val: value & 0xFF);
250 hdmi_writeb(hdmi, HDMI_EXT_HDELAY_H, val: (value >> 8) & 0xFF);
251
252 value = mode->hsync_end - mode->hsync_start;
253 hdmi_writeb(hdmi, HDMI_EXT_HDURATION_L, val: value & 0xFF);
254 hdmi_writeb(hdmi, HDMI_EXT_HDURATION_H, val: (value >> 8) & 0xFF);
255
256 value = mode->vtotal;
257 hdmi_writeb(hdmi, HDMI_EXT_VTOTAL_L, val: value & 0xFF);
258 hdmi_writeb(hdmi, HDMI_EXT_VTOTAL_H, val: (value >> 8) & 0xFF);
259
260 value = mode->vtotal - mode->vdisplay;
261 hdmi_writeb(hdmi, HDMI_EXT_VBLANK_L, val: value & 0xFF);
262
263 value = mode->vtotal - mode->vsync_start + vsync_offset;
264 hdmi_writeb(hdmi, HDMI_EXT_VDELAY, val: value & 0xFF);
265
266 value = mode->vsync_end - mode->vsync_start;
267 hdmi_writeb(hdmi, HDMI_EXT_VDURATION, val: value & 0xFF);
268
269 return 0;
270}
271
272static void
273rk3066_hdmi_phy_write(struct rk3066_hdmi *hdmi, u16 offset, u8 value)
274{
275 hdmi_writeb(hdmi, offset, val: value);
276 hdmi_modb(hdmi, HDMI_SYS_CTRL,
277 msk: HDMI_SYS_PLL_RESET_MASK, val: HDMI_SYS_PLL_RESET);
278 usleep_range(min: 90, max: 100);
279 hdmi_modb(hdmi, HDMI_SYS_CTRL, msk: HDMI_SYS_PLL_RESET_MASK, val: 0);
280 usleep_range(min: 900, max: 1000);
281}
282
283static void rk3066_hdmi_config_phy(struct rk3066_hdmi *hdmi)
284{
285 /* TMDS uses the same frequency as dclk. */
286 hdmi_writeb(hdmi, HDMI_DEEP_COLOR_MODE, val: 0x22);
287
288 /*
289 * The semi-public documentation does not describe the hdmi registers
290 * used by the function rk3066_hdmi_phy_write(), so we keep using
291 * these magic values for now.
292 */
293 if (hdmi->tmdsclk > 100000000) {
294 rk3066_hdmi_phy_write(hdmi, offset: 0x158, value: 0x0E);
295 rk3066_hdmi_phy_write(hdmi, offset: 0x15c, value: 0x00);
296 rk3066_hdmi_phy_write(hdmi, offset: 0x160, value: 0x60);
297 rk3066_hdmi_phy_write(hdmi, offset: 0x164, value: 0x00);
298 rk3066_hdmi_phy_write(hdmi, offset: 0x168, value: 0xDA);
299 rk3066_hdmi_phy_write(hdmi, offset: 0x16c, value: 0xA1);
300 rk3066_hdmi_phy_write(hdmi, offset: 0x170, value: 0x0e);
301 rk3066_hdmi_phy_write(hdmi, offset: 0x174, value: 0x22);
302 rk3066_hdmi_phy_write(hdmi, offset: 0x178, value: 0x00);
303 } else if (hdmi->tmdsclk > 50000000) {
304 rk3066_hdmi_phy_write(hdmi, offset: 0x158, value: 0x06);
305 rk3066_hdmi_phy_write(hdmi, offset: 0x15c, value: 0x00);
306 rk3066_hdmi_phy_write(hdmi, offset: 0x160, value: 0x60);
307 rk3066_hdmi_phy_write(hdmi, offset: 0x164, value: 0x00);
308 rk3066_hdmi_phy_write(hdmi, offset: 0x168, value: 0xCA);
309 rk3066_hdmi_phy_write(hdmi, offset: 0x16c, value: 0xA3);
310 rk3066_hdmi_phy_write(hdmi, offset: 0x170, value: 0x0e);
311 rk3066_hdmi_phy_write(hdmi, offset: 0x174, value: 0x20);
312 rk3066_hdmi_phy_write(hdmi, offset: 0x178, value: 0x00);
313 } else {
314 rk3066_hdmi_phy_write(hdmi, offset: 0x158, value: 0x02);
315 rk3066_hdmi_phy_write(hdmi, offset: 0x15c, value: 0x00);
316 rk3066_hdmi_phy_write(hdmi, offset: 0x160, value: 0x60);
317 rk3066_hdmi_phy_write(hdmi, offset: 0x164, value: 0x00);
318 rk3066_hdmi_phy_write(hdmi, offset: 0x168, value: 0xC2);
319 rk3066_hdmi_phy_write(hdmi, offset: 0x16c, value: 0xA2);
320 rk3066_hdmi_phy_write(hdmi, offset: 0x170, value: 0x0e);
321 rk3066_hdmi_phy_write(hdmi, offset: 0x174, value: 0x20);
322 rk3066_hdmi_phy_write(hdmi, offset: 0x178, value: 0x00);
323 }
324}
325
326static int rk3066_hdmi_setup(struct rk3066_hdmi *hdmi,
327 struct drm_display_mode *mode)
328{
329 struct drm_display_info *display = &hdmi->connector.display_info;
330
331 hdmi->hdmi_data.vic = drm_match_cea_mode(to_match: mode);
332 hdmi->hdmi_data.enc_out_format = HDMI_COLORSPACE_RGB;
333
334 if (hdmi->hdmi_data.vic == 6 || hdmi->hdmi_data.vic == 7 ||
335 hdmi->hdmi_data.vic == 21 || hdmi->hdmi_data.vic == 22 ||
336 hdmi->hdmi_data.vic == 2 || hdmi->hdmi_data.vic == 3 ||
337 hdmi->hdmi_data.vic == 17 || hdmi->hdmi_data.vic == 18)
338 hdmi->hdmi_data.colorimetry = HDMI_COLORIMETRY_ITU_601;
339 else
340 hdmi->hdmi_data.colorimetry = HDMI_COLORIMETRY_ITU_709;
341
342 hdmi->tmdsclk = mode->clock * 1000;
343
344 /* Mute video and audio output. */
345 hdmi_modb(hdmi, HDMI_VIDEO_CTRL2, msk: HDMI_VIDEO_AUDIO_DISABLE_MASK,
346 val: HDMI_AUDIO_DISABLE | HDMI_VIDEO_DISABLE);
347
348 /* Set power state to mode B. */
349 if (rk3066_hdmi_get_power_mode(hdmi) != HDMI_SYS_POWER_MODE_B)
350 rk3066_hdmi_set_power_mode(hdmi, mode: HDMI_SYS_POWER_MODE_B);
351
352 /* Input video mode is RGB 24 bit. Use external data enable signal. */
353 hdmi_modb(hdmi, HDMI_AV_CTRL1,
354 msk: HDMI_VIDEO_DE_MASK, val: HDMI_VIDEO_EXTERNAL_DE);
355 hdmi_writeb(hdmi, HDMI_VIDEO_CTRL1,
356 val: HDMI_VIDEO_OUTPUT_RGB444 |
357 HDMI_VIDEO_INPUT_DATA_DEPTH_8BIT |
358 HDMI_VIDEO_INPUT_COLOR_RGB);
359 hdmi_writeb(hdmi, HDMI_DEEP_COLOR_MODE, val: 0x20);
360
361 rk3066_hdmi_config_video_timing(hdmi, mode);
362
363 if (display->is_hdmi) {
364 hdmi_modb(hdmi, HDMI_HDCP_CTRL, msk: HDMI_VIDEO_MODE_MASK,
365 val: HDMI_VIDEO_MODE_HDMI);
366 rk3066_hdmi_config_avi(hdmi, mode);
367 } else {
368 hdmi_modb(hdmi, HDMI_HDCP_CTRL, msk: HDMI_VIDEO_MODE_MASK, val: 0);
369 }
370
371 rk3066_hdmi_config_phy(hdmi);
372
373 rk3066_hdmi_set_power_mode(hdmi, mode: HDMI_SYS_POWER_MODE_E);
374
375 /*
376 * When the IP controller is configured with accurate video
377 * timing, the TMDS clock source should be switched to
378 * DCLK_LCDC, so we need to init the TMDS rate to the pixel mode
379 * clock rate and reconfigure the DDC clock.
380 */
381 rk3066_hdmi_i2c_init(hdmi);
382
383 /* Unmute video output. */
384 hdmi_modb(hdmi, HDMI_VIDEO_CTRL2,
385 msk: HDMI_VIDEO_AUDIO_DISABLE_MASK, val: HDMI_AUDIO_DISABLE);
386 return 0;
387}
388
389static void rk3066_hdmi_encoder_enable(struct drm_encoder *encoder,
390 struct drm_atomic_state *state)
391{
392 struct rk3066_hdmi *hdmi = encoder_to_rk3066_hdmi(encoder);
393 struct drm_connector_state *conn_state;
394 struct drm_crtc_state *crtc_state;
395 int mux, val;
396
397 conn_state = drm_atomic_get_new_connector_state(state, connector: &hdmi->connector);
398 if (WARN_ON(!conn_state))
399 return;
400
401 crtc_state = drm_atomic_get_new_crtc_state(state, crtc: conn_state->crtc);
402 if (WARN_ON(!crtc_state))
403 return;
404
405 mux = drm_of_encoder_active_endpoint_id(node: hdmi->dev->of_node, encoder);
406 if (mux)
407 val = (HDMI_VIDEO_SEL << 16) | HDMI_VIDEO_SEL;
408 else
409 val = HDMI_VIDEO_SEL << 16;
410
411 regmap_write(map: hdmi->grf_regmap, GRF_SOC_CON0, val);
412
413 DRM_DEV_DEBUG(hdmi->dev, "hdmi encoder enable select: vop%s\n",
414 (mux) ? "1" : "0");
415
416 rk3066_hdmi_setup(hdmi, mode: &crtc_state->adjusted_mode);
417}
418
419static void rk3066_hdmi_encoder_disable(struct drm_encoder *encoder,
420 struct drm_atomic_state *state)
421{
422 struct rk3066_hdmi *hdmi = encoder_to_rk3066_hdmi(encoder);
423
424 DRM_DEV_DEBUG(hdmi->dev, "hdmi encoder disable\n");
425
426 if (rk3066_hdmi_get_power_mode(hdmi) == HDMI_SYS_POWER_MODE_E) {
427 hdmi_writeb(hdmi, HDMI_VIDEO_CTRL2,
428 val: HDMI_VIDEO_AUDIO_DISABLE_MASK);
429 hdmi_modb(hdmi, HDMI_VIDEO_CTRL2,
430 msk: HDMI_AUDIO_CP_LOGIC_RESET_MASK,
431 val: HDMI_AUDIO_CP_LOGIC_RESET);
432 usleep_range(min: 500, max: 510);
433 }
434 rk3066_hdmi_set_power_mode(hdmi, mode: HDMI_SYS_POWER_MODE_A);
435}
436
437static int
438rk3066_hdmi_encoder_atomic_check(struct drm_encoder *encoder,
439 struct drm_crtc_state *crtc_state,
440 struct drm_connector_state *conn_state)
441{
442 struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
443
444 s->output_mode = ROCKCHIP_OUT_MODE_P888;
445 s->output_type = DRM_MODE_CONNECTOR_HDMIA;
446
447 return 0;
448}
449
450static const
451struct drm_encoder_helper_funcs rk3066_hdmi_encoder_helper_funcs = {
452 .atomic_check = rk3066_hdmi_encoder_atomic_check,
453 .atomic_enable = rk3066_hdmi_encoder_enable,
454 .atomic_disable = rk3066_hdmi_encoder_disable,
455};
456
457static enum drm_connector_status
458rk3066_hdmi_connector_detect(struct drm_connector *connector, bool force)
459{
460 struct rk3066_hdmi *hdmi = connector_to_rk3066_hdmi(connector);
461
462 return (hdmi_readb(hdmi, HDMI_HPG_MENS_STA) & HDMI_HPG_IN_STATUS_HIGH) ?
463 connector_status_connected : connector_status_disconnected;
464}
465
466static int rk3066_hdmi_connector_get_modes(struct drm_connector *connector)
467{
468 struct rk3066_hdmi *hdmi = connector_to_rk3066_hdmi(connector);
469 struct edid *edid;
470 int ret = 0;
471
472 if (!hdmi->ddc)
473 return 0;
474
475 edid = drm_get_edid(connector, adapter: hdmi->ddc);
476 if (edid) {
477 drm_connector_update_edid_property(connector, edid);
478 ret = drm_add_edid_modes(connector, edid);
479 kfree(objp: edid);
480 }
481
482 return ret;
483}
484
485static enum drm_mode_status
486rk3066_hdmi_connector_mode_valid(struct drm_connector *connector,
487 struct drm_display_mode *mode)
488{
489 u32 vic = drm_match_cea_mode(to_match: mode);
490
491 if (vic > 1)
492 return MODE_OK;
493 else
494 return MODE_BAD;
495}
496
497static struct drm_encoder *
498rk3066_hdmi_connector_best_encoder(struct drm_connector *connector)
499{
500 struct rk3066_hdmi *hdmi = connector_to_rk3066_hdmi(connector);
501
502 return &hdmi->encoder.encoder;
503}
504
505static int
506rk3066_hdmi_probe_single_connector_modes(struct drm_connector *connector,
507 uint32_t maxX, uint32_t maxY)
508{
509 if (maxX > 1920)
510 maxX = 1920;
511 if (maxY > 1080)
512 maxY = 1080;
513
514 return drm_helper_probe_single_connector_modes(connector, maxX, maxY);
515}
516
517static void rk3066_hdmi_connector_destroy(struct drm_connector *connector)
518{
519 drm_connector_unregister(connector);
520 drm_connector_cleanup(connector);
521}
522
523static const struct drm_connector_funcs rk3066_hdmi_connector_funcs = {
524 .fill_modes = rk3066_hdmi_probe_single_connector_modes,
525 .detect = rk3066_hdmi_connector_detect,
526 .destroy = rk3066_hdmi_connector_destroy,
527 .reset = drm_atomic_helper_connector_reset,
528 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
529 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
530};
531
532static const
533struct drm_connector_helper_funcs rk3066_hdmi_connector_helper_funcs = {
534 .get_modes = rk3066_hdmi_connector_get_modes,
535 .mode_valid = rk3066_hdmi_connector_mode_valid,
536 .best_encoder = rk3066_hdmi_connector_best_encoder,
537};
538
539static int
540rk3066_hdmi_register(struct drm_device *drm, struct rk3066_hdmi *hdmi)
541{
542 struct drm_encoder *encoder = &hdmi->encoder.encoder;
543 struct device *dev = hdmi->dev;
544
545 encoder->possible_crtcs =
546 drm_of_find_possible_crtcs(dev: drm, port: dev->of_node);
547
548 /*
549 * If we failed to find the CRTC(s) which this encoder is
550 * supposed to be connected to, it's because the CRTC has
551 * not been registered yet. Defer probing, and hope that
552 * the required CRTC is added later.
553 */
554 if (encoder->possible_crtcs == 0)
555 return -EPROBE_DEFER;
556
557 drm_encoder_helper_add(encoder, funcs: &rk3066_hdmi_encoder_helper_funcs);
558 drm_simple_encoder_init(dev: drm, encoder, DRM_MODE_ENCODER_TMDS);
559
560 hdmi->connector.polled = DRM_CONNECTOR_POLL_HPD;
561
562 drm_connector_helper_add(connector: &hdmi->connector,
563 funcs: &rk3066_hdmi_connector_helper_funcs);
564 drm_connector_init_with_ddc(dev: drm, connector: &hdmi->connector,
565 funcs: &rk3066_hdmi_connector_funcs,
566 DRM_MODE_CONNECTOR_HDMIA,
567 ddc: hdmi->ddc);
568
569 drm_connector_attach_encoder(connector: &hdmi->connector, encoder);
570
571 return 0;
572}
573
574static irqreturn_t rk3066_hdmi_hardirq(int irq, void *dev_id)
575{
576 struct rk3066_hdmi *hdmi = dev_id;
577 irqreturn_t ret = IRQ_NONE;
578 u8 interrupt;
579
580 if (rk3066_hdmi_get_power_mode(hdmi) == HDMI_SYS_POWER_MODE_A)
581 hdmi_writeb(hdmi, HDMI_SYS_CTRL, val: HDMI_SYS_POWER_MODE_B);
582
583 interrupt = hdmi_readb(hdmi, HDMI_INTR_STATUS1);
584 if (interrupt)
585 hdmi_writeb(hdmi, HDMI_INTR_STATUS1, val: interrupt);
586
587 if (interrupt & HDMI_INTR_EDID_MASK) {
588 hdmi->i2c->stat = interrupt;
589 complete(&hdmi->i2c->cmpltn);
590 }
591
592 if (interrupt & (HDMI_INTR_HOTPLUG | HDMI_INTR_MSENS))
593 ret = IRQ_WAKE_THREAD;
594
595 return ret;
596}
597
598static irqreturn_t rk3066_hdmi_irq(int irq, void *dev_id)
599{
600 struct rk3066_hdmi *hdmi = dev_id;
601
602 drm_helper_hpd_irq_event(dev: hdmi->connector.dev);
603
604 return IRQ_HANDLED;
605}
606
607static int rk3066_hdmi_i2c_read(struct rk3066_hdmi *hdmi, struct i2c_msg *msgs)
608{
609 int length = msgs->len;
610 u8 *buf = msgs->buf;
611 int ret;
612
613 ret = wait_for_completion_timeout(x: &hdmi->i2c->cmpltn, HZ / 10);
614 if (!ret || hdmi->i2c->stat & HDMI_INTR_EDID_ERR)
615 return -EAGAIN;
616
617 while (length--)
618 *buf++ = hdmi_readb(hdmi, HDMI_DDC_READ_FIFO_ADDR);
619
620 return 0;
621}
622
623static int rk3066_hdmi_i2c_write(struct rk3066_hdmi *hdmi, struct i2c_msg *msgs)
624{
625 /*
626 * The DDC module only supports read EDID message, so
627 * we assume that each word write to this i2c adapter
628 * should be the offset of the EDID word address.
629 */
630 if (msgs->len != 1 ||
631 (msgs->addr != DDC_ADDR && msgs->addr != DDC_SEGMENT_ADDR))
632 return -EINVAL;
633
634 reinit_completion(x: &hdmi->i2c->cmpltn);
635
636 if (msgs->addr == DDC_SEGMENT_ADDR)
637 hdmi->i2c->segment_addr = msgs->buf[0];
638 if (msgs->addr == DDC_ADDR)
639 hdmi->i2c->ddc_addr = msgs->buf[0];
640
641 /* Set edid fifo first address. */
642 hdmi_writeb(hdmi, HDMI_EDID_FIFO_ADDR, val: 0x00);
643
644 /* Set edid word address 0x00/0x80. */
645 hdmi_writeb(hdmi, HDMI_EDID_WORD_ADDR, val: hdmi->i2c->ddc_addr);
646
647 /* Set edid segment pointer. */
648 hdmi_writeb(hdmi, HDMI_EDID_SEGMENT_POINTER, val: hdmi->i2c->segment_addr);
649
650 return 0;
651}
652
653static int rk3066_hdmi_i2c_xfer(struct i2c_adapter *adap,
654 struct i2c_msg *msgs, int num)
655{
656 struct rk3066_hdmi *hdmi = i2c_get_adapdata(adap);
657 struct rk3066_hdmi_i2c *i2c = hdmi->i2c;
658 int i, ret = 0;
659
660 mutex_lock(&i2c->i2c_lock);
661
662 rk3066_hdmi_i2c_init(hdmi);
663
664 /* Unmute HDMI EDID interrupt. */
665 hdmi_modb(hdmi, HDMI_INTR_MASK1,
666 msk: HDMI_INTR_EDID_MASK, val: HDMI_INTR_EDID_MASK);
667 i2c->stat = 0;
668
669 for (i = 0; i < num; i++) {
670 DRM_DEV_DEBUG(hdmi->dev,
671 "xfer: num: %d/%d, len: %d, flags: %#x\n",
672 i + 1, num, msgs[i].len, msgs[i].flags);
673
674 if (msgs[i].flags & I2C_M_RD)
675 ret = rk3066_hdmi_i2c_read(hdmi, msgs: &msgs[i]);
676 else
677 ret = rk3066_hdmi_i2c_write(hdmi, msgs: &msgs[i]);
678
679 if (ret < 0)
680 break;
681 }
682
683 if (!ret)
684 ret = num;
685
686 /* Mute HDMI EDID interrupt. */
687 hdmi_modb(hdmi, HDMI_INTR_MASK1, msk: HDMI_INTR_EDID_MASK, val: 0);
688
689 mutex_unlock(lock: &i2c->i2c_lock);
690
691 return ret;
692}
693
694static u32 rk3066_hdmi_i2c_func(struct i2c_adapter *adapter)
695{
696 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
697}
698
699static const struct i2c_algorithm rk3066_hdmi_algorithm = {
700 .master_xfer = rk3066_hdmi_i2c_xfer,
701 .functionality = rk3066_hdmi_i2c_func,
702};
703
704static struct i2c_adapter *rk3066_hdmi_i2c_adapter(struct rk3066_hdmi *hdmi)
705{
706 struct i2c_adapter *adap;
707 struct rk3066_hdmi_i2c *i2c;
708 int ret;
709
710 i2c = devm_kzalloc(dev: hdmi->dev, size: sizeof(*i2c), GFP_KERNEL);
711 if (!i2c)
712 return ERR_PTR(error: -ENOMEM);
713
714 mutex_init(&i2c->i2c_lock);
715 init_completion(x: &i2c->cmpltn);
716
717 adap = &i2c->adap;
718 adap->owner = THIS_MODULE;
719 adap->dev.parent = hdmi->dev;
720 adap->dev.of_node = hdmi->dev->of_node;
721 adap->algo = &rk3066_hdmi_algorithm;
722 strscpy(adap->name, "RK3066 HDMI", sizeof(adap->name));
723 i2c_set_adapdata(adap, data: hdmi);
724
725 ret = i2c_add_adapter(adap);
726 if (ret) {
727 DRM_DEV_ERROR(hdmi->dev, "cannot add %s I2C adapter\n",
728 adap->name);
729 devm_kfree(dev: hdmi->dev, p: i2c);
730 return ERR_PTR(error: ret);
731 }
732
733 hdmi->i2c = i2c;
734
735 DRM_DEV_DEBUG(hdmi->dev, "registered %s I2C bus driver\n", adap->name);
736
737 return adap;
738}
739
740static int rk3066_hdmi_bind(struct device *dev, struct device *master,
741 void *data)
742{
743 struct platform_device *pdev = to_platform_device(dev);
744 struct drm_device *drm = data;
745 struct rk3066_hdmi *hdmi;
746 int irq;
747 int ret;
748
749 hdmi = devm_kzalloc(dev, size: sizeof(*hdmi), GFP_KERNEL);
750 if (!hdmi)
751 return -ENOMEM;
752
753 hdmi->dev = dev;
754 hdmi->drm_dev = drm;
755 hdmi->regs = devm_platform_ioremap_resource(pdev, index: 0);
756 if (IS_ERR(ptr: hdmi->regs))
757 return PTR_ERR(ptr: hdmi->regs);
758
759 irq = platform_get_irq(pdev, 0);
760 if (irq < 0)
761 return irq;
762
763 hdmi->hclk = devm_clk_get(dev, id: "hclk");
764 if (IS_ERR(ptr: hdmi->hclk)) {
765 DRM_DEV_ERROR(dev, "unable to get HDMI hclk clock\n");
766 return PTR_ERR(ptr: hdmi->hclk);
767 }
768
769 ret = clk_prepare_enable(clk: hdmi->hclk);
770 if (ret) {
771 DRM_DEV_ERROR(dev, "cannot enable HDMI hclk clock: %d\n", ret);
772 return ret;
773 }
774
775 hdmi->grf_regmap = syscon_regmap_lookup_by_phandle(np: dev->of_node,
776 property: "rockchip,grf");
777 if (IS_ERR(ptr: hdmi->grf_regmap)) {
778 DRM_DEV_ERROR(dev, "unable to get rockchip,grf\n");
779 ret = PTR_ERR(ptr: hdmi->grf_regmap);
780 goto err_disable_hclk;
781 }
782
783 /* internal hclk = hdmi_hclk / 25 */
784 hdmi_writeb(hdmi, HDMI_INTERNAL_CLK_DIVIDER, val: 25);
785
786 hdmi->ddc = rk3066_hdmi_i2c_adapter(hdmi);
787 if (IS_ERR(ptr: hdmi->ddc)) {
788 ret = PTR_ERR(ptr: hdmi->ddc);
789 hdmi->ddc = NULL;
790 goto err_disable_hclk;
791 }
792
793 rk3066_hdmi_set_power_mode(hdmi, mode: HDMI_SYS_POWER_MODE_B);
794 usleep_range(min: 999, max: 1000);
795 hdmi_writeb(hdmi, HDMI_INTR_MASK1, val: HDMI_INTR_HOTPLUG);
796 hdmi_writeb(hdmi, HDMI_INTR_MASK2, val: 0);
797 hdmi_writeb(hdmi, HDMI_INTR_MASK3, val: 0);
798 hdmi_writeb(hdmi, HDMI_INTR_MASK4, val: 0);
799 rk3066_hdmi_set_power_mode(hdmi, mode: HDMI_SYS_POWER_MODE_A);
800
801 ret = rk3066_hdmi_register(drm, hdmi);
802 if (ret)
803 goto err_disable_i2c;
804
805 dev_set_drvdata(dev, data: hdmi);
806
807 ret = devm_request_threaded_irq(dev, irq, handler: rk3066_hdmi_hardirq,
808 thread_fn: rk3066_hdmi_irq, IRQF_SHARED,
809 devname: dev_name(dev), dev_id: hdmi);
810 if (ret) {
811 DRM_DEV_ERROR(dev, "failed to request hdmi irq: %d\n", ret);
812 goto err_cleanup_hdmi;
813 }
814
815 return 0;
816
817err_cleanup_hdmi:
818 hdmi->connector.funcs->destroy(&hdmi->connector);
819 hdmi->encoder.encoder.funcs->destroy(&hdmi->encoder.encoder);
820err_disable_i2c:
821 i2c_put_adapter(adap: hdmi->ddc);
822err_disable_hclk:
823 clk_disable_unprepare(clk: hdmi->hclk);
824
825 return ret;
826}
827
828static void rk3066_hdmi_unbind(struct device *dev, struct device *master,
829 void *data)
830{
831 struct rk3066_hdmi *hdmi = dev_get_drvdata(dev);
832
833 hdmi->connector.funcs->destroy(&hdmi->connector);
834 hdmi->encoder.encoder.funcs->destroy(&hdmi->encoder.encoder);
835
836 i2c_put_adapter(adap: hdmi->ddc);
837 clk_disable_unprepare(clk: hdmi->hclk);
838}
839
840static const struct component_ops rk3066_hdmi_ops = {
841 .bind = rk3066_hdmi_bind,
842 .unbind = rk3066_hdmi_unbind,
843};
844
845static int rk3066_hdmi_probe(struct platform_device *pdev)
846{
847 return component_add(&pdev->dev, &rk3066_hdmi_ops);
848}
849
850static void rk3066_hdmi_remove(struct platform_device *pdev)
851{
852 component_del(&pdev->dev, &rk3066_hdmi_ops);
853}
854
855static const struct of_device_id rk3066_hdmi_dt_ids[] = {
856 { .compatible = "rockchip,rk3066-hdmi" },
857 { /* sentinel */ },
858};
859MODULE_DEVICE_TABLE(of, rk3066_hdmi_dt_ids);
860
861struct platform_driver rk3066_hdmi_driver = {
862 .probe = rk3066_hdmi_probe,
863 .remove_new = rk3066_hdmi_remove,
864 .driver = {
865 .name = "rockchip-rk3066-hdmi",
866 .of_match_table = rk3066_hdmi_dt_ids,
867 },
868};
869

source code of linux/drivers/gpu/drm/rockchip/rk3066_hdmi.c