1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Chrontel CH7033 Video Encoder Driver
4 *
5 * Copyright (C) 2019,2020 Lubomir Rintel
6 */
7
8#include <linux/gpio/consumer.h>
9#include <linux/i2c.h>
10#include <linux/module.h>
11#include <linux/regmap.h>
12
13#include <drm/drm_atomic_helper.h>
14#include <drm/drm_bridge.h>
15#include <drm/drm_edid.h>
16#include <drm/drm_of.h>
17#include <drm/drm_print.h>
18#include <drm/drm_probe_helper.h>
19
20/* Page 0, Register 0x07 */
21enum {
22 DRI_PD = BIT(3),
23 IO_PD = BIT(5),
24};
25
26/* Page 0, Register 0x08 */
27enum {
28 DRI_PDDRI = GENMASK(7, 4),
29 PDDAC = GENMASK(3, 1),
30 PANEN = BIT(0),
31};
32
33/* Page 0, Register 0x09 */
34enum {
35 DPD = BIT(7),
36 GCKOFF = BIT(6),
37 TV_BP = BIT(5),
38 SCLPD = BIT(4),
39 SDPD = BIT(3),
40 VGA_PD = BIT(2),
41 HDBKPD = BIT(1),
42 HDMI_PD = BIT(0),
43};
44
45/* Page 0, Register 0x0a */
46enum {
47 MEMINIT = BIT(7),
48 MEMIDLE = BIT(6),
49 MEMPD = BIT(5),
50 STOP = BIT(4),
51 LVDS_PD = BIT(3),
52 HD_DVIB = BIT(2),
53 HDCP_PD = BIT(1),
54 MCU_PD = BIT(0),
55};
56
57/* Page 0, Register 0x18 */
58enum {
59 IDF = GENMASK(7, 4),
60 INTEN = BIT(3),
61 SWAP = GENMASK(2, 0),
62};
63
64enum {
65 BYTE_SWAP_RGB = 0,
66 BYTE_SWAP_RBG = 1,
67 BYTE_SWAP_GRB = 2,
68 BYTE_SWAP_GBR = 3,
69 BYTE_SWAP_BRG = 4,
70 BYTE_SWAP_BGR = 5,
71};
72
73/* Page 0, Register 0x19 */
74enum {
75 HPO_I = BIT(5),
76 VPO_I = BIT(4),
77 DEPO_I = BIT(3),
78 CRYS_EN = BIT(2),
79 GCLKFREQ = GENMASK(2, 0),
80};
81
82/* Page 0, Register 0x2e */
83enum {
84 HFLIP = BIT(7),
85 VFLIP = BIT(6),
86 DEPO_O = BIT(5),
87 HPO_O = BIT(4),
88 VPO_O = BIT(3),
89 TE = GENMASK(2, 0),
90};
91
92/* Page 0, Register 0x2b */
93enum {
94 SWAPS = GENMASK(7, 4),
95 VFMT = GENMASK(3, 0),
96};
97
98/* Page 0, Register 0x54 */
99enum {
100 COMP_BP = BIT(7),
101 DAC_EN_T = BIT(6),
102 HWO_HDMI_HI = GENMASK(5, 3),
103 HOO_HDMI_HI = GENMASK(2, 0),
104};
105
106/* Page 0, Register 0x57 */
107enum {
108 FLDSEN = BIT(7),
109 VWO_HDMI_HI = GENMASK(5, 3),
110 VOO_HDMI_HI = GENMASK(2, 0),
111};
112
113/* Page 0, Register 0x7e */
114enum {
115 HDMI_LVDS_SEL = BIT(7),
116 DE_GEN = BIT(6),
117 PWM_INDEX_HI = BIT(5),
118 USE_DE = BIT(4),
119 R_INT = GENMASK(3, 0),
120};
121
122/* Page 1, Register 0x07 */
123enum {
124 BPCKSEL = BIT(7),
125 DRI_CMFB_EN = BIT(6),
126 CEC_PUEN = BIT(5),
127 CEC_T = BIT(3),
128 CKINV = BIT(2),
129 CK_TVINV = BIT(1),
130 DRI_CKS2 = BIT(0),
131};
132
133/* Page 1, Register 0x08 */
134enum {
135 DACG = BIT(6),
136 DACKTST = BIT(5),
137 DEDGEB = BIT(4),
138 SYO = BIT(3),
139 DRI_IT_LVDS = GENMASK(2, 1),
140 DISPON = BIT(0),
141};
142
143/* Page 1, Register 0x0c */
144enum {
145 DRI_PLL_CP = GENMASK(7, 6),
146 DRI_PLL_DIVSEL = BIT(5),
147 DRI_PLL_N1_1 = BIT(4),
148 DRI_PLL_N1_0 = BIT(3),
149 DRI_PLL_N3_1 = BIT(2),
150 DRI_PLL_N3_0 = BIT(1),
151 DRI_PLL_CKTSTEN = BIT(0),
152};
153
154/* Page 1, Register 0x6b */
155enum {
156 VCO3CS = GENMASK(7, 6),
157 ICPGBK2_0 = GENMASK(5, 3),
158 DRI_VCO357SC = BIT(2),
159 PDPLL2 = BIT(1),
160 DRI_PD_SER = BIT(0),
161};
162
163/* Page 1, Register 0x6c */
164enum {
165 PLL2N11 = GENMASK(7, 4),
166 PLL2N5_4 = BIT(3),
167 PLL2N5_TOP = BIT(2),
168 DRI_PLL_PD = BIT(1),
169 PD_I2CM = BIT(0),
170};
171
172/* Page 3, Register 0x28 */
173enum {
174 DIFF_EN = GENMASK(7, 6),
175 CORREC_EN = GENMASK(5, 4),
176 VGACLK_BP = BIT(3),
177 HM_LV_SEL = BIT(2),
178 HD_VGA_SEL = BIT(1),
179};
180
181/* Page 3, Register 0x2a */
182enum {
183 LVDSCLK_BP = BIT(7),
184 HDTVCLK_BP = BIT(6),
185 HDMICLK_BP = BIT(5),
186 HDTV_BP = BIT(4),
187 HDMI_BP = BIT(3),
188 THRWL = GENMASK(2, 0),
189};
190
191/* Page 4, Register 0x52 */
192enum {
193 PGM_ARSTB = BIT(7),
194 MCU_ARSTB = BIT(6),
195 MCU_RETB = BIT(2),
196 RESETIB = BIT(1),
197 RESETDB = BIT(0),
198};
199
200struct ch7033_priv {
201 struct regmap *regmap;
202 struct drm_bridge *next_bridge;
203 struct drm_bridge bridge;
204 struct drm_connector connector;
205};
206
207#define conn_to_ch7033_priv(x) \
208 container_of(x, struct ch7033_priv, connector)
209#define bridge_to_ch7033_priv(x) \
210 container_of(x, struct ch7033_priv, bridge)
211
212
213static enum drm_connector_status ch7033_connector_detect(
214 struct drm_connector *connector, bool force)
215{
216 struct ch7033_priv *priv = conn_to_ch7033_priv(connector);
217
218 return drm_bridge_detect(bridge: priv->next_bridge);
219}
220
221static const struct drm_connector_funcs ch7033_connector_funcs = {
222 .reset = drm_atomic_helper_connector_reset,
223 .fill_modes = drm_helper_probe_single_connector_modes,
224 .detect = ch7033_connector_detect,
225 .destroy = drm_connector_cleanup,
226 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
227 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
228};
229
230static int ch7033_connector_get_modes(struct drm_connector *connector)
231{
232 struct ch7033_priv *priv = conn_to_ch7033_priv(connector);
233 struct edid *edid;
234 int ret;
235
236 edid = drm_bridge_get_edid(bridge: priv->next_bridge, connector);
237 drm_connector_update_edid_property(connector, edid);
238 if (edid) {
239 ret = drm_add_edid_modes(connector, edid);
240 kfree(objp: edid);
241 } else {
242 ret = drm_add_modes_noedid(connector, hdisplay: 1920, vdisplay: 1080);
243 drm_set_preferred_mode(connector, hpref: 1024, vpref: 768);
244 }
245
246 return ret;
247}
248
249static struct drm_encoder *ch7033_connector_best_encoder(
250 struct drm_connector *connector)
251{
252 struct ch7033_priv *priv = conn_to_ch7033_priv(connector);
253
254 return priv->bridge.encoder;
255}
256
257static const struct drm_connector_helper_funcs ch7033_connector_helper_funcs = {
258 .get_modes = ch7033_connector_get_modes,
259 .best_encoder = ch7033_connector_best_encoder,
260};
261
262static void ch7033_hpd_event(void *arg, enum drm_connector_status status)
263{
264 struct ch7033_priv *priv = arg;
265
266 if (priv->bridge.dev)
267 drm_helper_hpd_irq_event(dev: priv->connector.dev);
268}
269
270static int ch7033_bridge_attach(struct drm_bridge *bridge,
271 enum drm_bridge_attach_flags flags)
272{
273 struct ch7033_priv *priv = bridge_to_ch7033_priv(bridge);
274 struct drm_connector *connector = &priv->connector;
275 int ret;
276
277 ret = drm_bridge_attach(encoder: bridge->encoder, bridge: priv->next_bridge, previous: bridge,
278 flags: DRM_BRIDGE_ATTACH_NO_CONNECTOR);
279 if (ret)
280 return ret;
281
282 if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)
283 return 0;
284
285 if (priv->next_bridge->ops & DRM_BRIDGE_OP_DETECT) {
286 connector->polled = DRM_CONNECTOR_POLL_HPD;
287 } else {
288 connector->polled = DRM_CONNECTOR_POLL_CONNECT |
289 DRM_CONNECTOR_POLL_DISCONNECT;
290 }
291
292 if (priv->next_bridge->ops & DRM_BRIDGE_OP_HPD) {
293 drm_bridge_hpd_enable(bridge: priv->next_bridge, cb: ch7033_hpd_event,
294 data: priv);
295 }
296
297 drm_connector_helper_add(connector,
298 funcs: &ch7033_connector_helper_funcs);
299 ret = drm_connector_init_with_ddc(dev: bridge->dev, connector: &priv->connector,
300 funcs: &ch7033_connector_funcs,
301 connector_type: priv->next_bridge->type,
302 ddc: priv->next_bridge->ddc);
303 if (ret) {
304 DRM_ERROR("Failed to initialize connector\n");
305 return ret;
306 }
307
308 return drm_connector_attach_encoder(connector: &priv->connector, encoder: bridge->encoder);
309}
310
311static void ch7033_bridge_detach(struct drm_bridge *bridge)
312{
313 struct ch7033_priv *priv = bridge_to_ch7033_priv(bridge);
314
315 if (priv->next_bridge->ops & DRM_BRIDGE_OP_HPD)
316 drm_bridge_hpd_disable(bridge: priv->next_bridge);
317 drm_connector_cleanup(connector: &priv->connector);
318}
319
320static enum drm_mode_status ch7033_bridge_mode_valid(struct drm_bridge *bridge,
321 const struct drm_display_info *info,
322 const struct drm_display_mode *mode)
323{
324 if (mode->clock > 165000)
325 return MODE_CLOCK_HIGH;
326 if (mode->hdisplay >= 1920)
327 return MODE_BAD_HVALUE;
328 if (mode->vdisplay >= 1080)
329 return MODE_BAD_VVALUE;
330 return MODE_OK;
331}
332
333static void ch7033_bridge_disable(struct drm_bridge *bridge)
334{
335 struct ch7033_priv *priv = bridge_to_ch7033_priv(bridge);
336
337 regmap_write(map: priv->regmap, reg: 0x03, val: 0x04);
338 regmap_update_bits(map: priv->regmap, reg: 0x52, mask: RESETDB, val: 0x00);
339}
340
341static void ch7033_bridge_enable(struct drm_bridge *bridge)
342{
343 struct ch7033_priv *priv = bridge_to_ch7033_priv(bridge);
344
345 regmap_write(map: priv->regmap, reg: 0x03, val: 0x04);
346 regmap_update_bits(map: priv->regmap, reg: 0x52, mask: RESETDB, val: RESETDB);
347}
348
349static void ch7033_bridge_mode_set(struct drm_bridge *bridge,
350 const struct drm_display_mode *mode,
351 const struct drm_display_mode *adjusted_mode)
352{
353 struct ch7033_priv *priv = bridge_to_ch7033_priv(bridge);
354 int hbporch = mode->hsync_start - mode->hdisplay;
355 int hsynclen = mode->hsync_end - mode->hsync_start;
356 int vbporch = mode->vsync_start - mode->vdisplay;
357 int vsynclen = mode->vsync_end - mode->vsync_start;
358
359 /*
360 * Page 4
361 */
362 regmap_write(map: priv->regmap, reg: 0x03, val: 0x04);
363
364 /* Turn everything off to set all the registers to their defaults. */
365 regmap_write(map: priv->regmap, reg: 0x52, val: 0x00);
366 /* Bring I/O block up. */
367 regmap_write(map: priv->regmap, reg: 0x52, val: RESETIB);
368
369 /*
370 * Page 0
371 */
372 regmap_write(map: priv->regmap, reg: 0x03, val: 0x00);
373
374 /* Bring up parts we need from the power down. */
375 regmap_update_bits(map: priv->regmap, reg: 0x07, mask: DRI_PD | IO_PD, val: 0);
376 regmap_update_bits(map: priv->regmap, reg: 0x08, mask: DRI_PDDRI | PDDAC | PANEN, val: 0);
377 regmap_update_bits(map: priv->regmap, reg: 0x09, mask: DPD | GCKOFF |
378 HDMI_PD | VGA_PD, val: 0);
379 regmap_update_bits(map: priv->regmap, reg: 0x0a, mask: HD_DVIB, val: 0);
380
381 /* Horizontal input timing. */
382 regmap_write(map: priv->regmap, reg: 0x0b, val: (mode->htotal >> 8) << 3 |
383 (mode->hdisplay >> 8));
384 regmap_write(map: priv->regmap, reg: 0x0c, val: mode->hdisplay);
385 regmap_write(map: priv->regmap, reg: 0x0d, val: mode->htotal);
386 regmap_write(map: priv->regmap, reg: 0x0e, val: (hsynclen >> 8) << 3 |
387 (hbporch >> 8));
388 regmap_write(map: priv->regmap, reg: 0x0f, val: hbporch);
389 regmap_write(map: priv->regmap, reg: 0x10, val: hsynclen);
390
391 /* Vertical input timing. */
392 regmap_write(map: priv->regmap, reg: 0x11, val: (mode->vtotal >> 8) << 3 |
393 (mode->vdisplay >> 8));
394 regmap_write(map: priv->regmap, reg: 0x12, val: mode->vdisplay);
395 regmap_write(map: priv->regmap, reg: 0x13, val: mode->vtotal);
396 regmap_write(map: priv->regmap, reg: 0x14, val: ((vsynclen >> 8) << 3) |
397 (vbporch >> 8));
398 regmap_write(map: priv->regmap, reg: 0x15, val: vbporch);
399 regmap_write(map: priv->regmap, reg: 0x16, val: vsynclen);
400
401 /* Input color swap. */
402 regmap_update_bits(map: priv->regmap, reg: 0x18, mask: SWAP, val: BYTE_SWAP_BGR);
403
404 /* Input clock and sync polarity. */
405 regmap_update_bits(map: priv->regmap, reg: 0x19, mask: 0x1, val: mode->clock >> 16);
406 regmap_update_bits(map: priv->regmap, reg: 0x19, mask: HPO_I | VPO_I | GCLKFREQ,
407 val: (mode->flags & DRM_MODE_FLAG_PHSYNC) ? HPO_I : 0 |
408 (mode->flags & DRM_MODE_FLAG_PVSYNC) ? VPO_I : 0 |
409 mode->clock >> 16);
410 regmap_write(map: priv->regmap, reg: 0x1a, val: mode->clock >> 8);
411 regmap_write(map: priv->regmap, reg: 0x1b, val: mode->clock);
412
413 /* Horizontal output timing. */
414 regmap_write(map: priv->regmap, reg: 0x1f, val: (mode->htotal >> 8) << 3 |
415 (mode->hdisplay >> 8));
416 regmap_write(map: priv->regmap, reg: 0x20, val: mode->hdisplay);
417 regmap_write(map: priv->regmap, reg: 0x21, val: mode->htotal);
418
419 /* Vertical output timing. */
420 regmap_write(map: priv->regmap, reg: 0x25, val: (mode->vtotal >> 8) << 3 |
421 (mode->vdisplay >> 8));
422 regmap_write(map: priv->regmap, reg: 0x26, val: mode->vdisplay);
423 regmap_write(map: priv->regmap, reg: 0x27, val: mode->vtotal);
424
425 /* VGA channel bypass */
426 regmap_update_bits(map: priv->regmap, reg: 0x2b, mask: VFMT, val: 9);
427
428 /* Output sync polarity. */
429 regmap_update_bits(map: priv->regmap, reg: 0x2e, mask: HPO_O | VPO_O,
430 val: (mode->flags & DRM_MODE_FLAG_PHSYNC) ? HPO_O : 0 |
431 (mode->flags & DRM_MODE_FLAG_PVSYNC) ? VPO_O : 0);
432
433 /* HDMI horizontal output timing. */
434 regmap_update_bits(map: priv->regmap, reg: 0x54, mask: HWO_HDMI_HI | HOO_HDMI_HI,
435 val: (hsynclen >> 8) << 3 |
436 (hbporch >> 8));
437 regmap_write(map: priv->regmap, reg: 0x55, val: hbporch);
438 regmap_write(map: priv->regmap, reg: 0x56, val: hsynclen);
439
440 /* HDMI vertical output timing. */
441 regmap_update_bits(map: priv->regmap, reg: 0x57, mask: VWO_HDMI_HI | VOO_HDMI_HI,
442 val: (vsynclen >> 8) << 3 |
443 (vbporch >> 8));
444 regmap_write(map: priv->regmap, reg: 0x58, val: vbporch);
445 regmap_write(map: priv->regmap, reg: 0x59, val: vsynclen);
446
447 /* Pick HDMI, not LVDS. */
448 regmap_update_bits(map: priv->regmap, reg: 0x7e, mask: HDMI_LVDS_SEL, val: HDMI_LVDS_SEL);
449
450 /*
451 * Page 1
452 */
453 regmap_write(map: priv->regmap, reg: 0x03, val: 0x01);
454
455 /* No idea what these do, but VGA is wobbly and blinky without them. */
456 regmap_update_bits(map: priv->regmap, reg: 0x07, mask: CKINV, val: CKINV);
457 regmap_update_bits(map: priv->regmap, reg: 0x08, mask: DISPON, val: DISPON);
458
459 /* DRI PLL */
460 regmap_update_bits(map: priv->regmap, reg: 0x0c, mask: DRI_PLL_DIVSEL, val: DRI_PLL_DIVSEL);
461 if (mode->clock <= 40000) {
462 regmap_update_bits(map: priv->regmap, reg: 0x0c, mask: DRI_PLL_N1_1 |
463 DRI_PLL_N1_0 |
464 DRI_PLL_N3_1 |
465 DRI_PLL_N3_0,
466 val: 0);
467 } else if (mode->clock < 80000) {
468 regmap_update_bits(map: priv->regmap, reg: 0x0c, mask: DRI_PLL_N1_1 |
469 DRI_PLL_N1_0 |
470 DRI_PLL_N3_1 |
471 DRI_PLL_N3_0,
472 val: DRI_PLL_N3_0 |
473 DRI_PLL_N1_0);
474 } else {
475 regmap_update_bits(map: priv->regmap, reg: 0x0c, mask: DRI_PLL_N1_1 |
476 DRI_PLL_N1_0 |
477 DRI_PLL_N3_1 |
478 DRI_PLL_N3_0,
479 val: DRI_PLL_N3_1 |
480 DRI_PLL_N1_1);
481 }
482
483 /* This seems to be color calibration for VGA. */
484 regmap_write(map: priv->regmap, reg: 0x64, val: 0x29); /* LSB Blue */
485 regmap_write(map: priv->regmap, reg: 0x65, val: 0x29); /* LSB Green */
486 regmap_write(map: priv->regmap, reg: 0x66, val: 0x29); /* LSB Red */
487 regmap_write(map: priv->regmap, reg: 0x67, val: 0x00); /* MSB Blue */
488 regmap_write(map: priv->regmap, reg: 0x68, val: 0x00); /* MSB Green */
489 regmap_write(map: priv->regmap, reg: 0x69, val: 0x00); /* MSB Red */
490
491 regmap_update_bits(map: priv->regmap, reg: 0x6b, mask: DRI_PD_SER, val: 0x00);
492 regmap_update_bits(map: priv->regmap, reg: 0x6c, mask: DRI_PLL_PD, val: 0x00);
493
494 /*
495 * Page 3
496 */
497 regmap_write(map: priv->regmap, reg: 0x03, val: 0x03);
498
499 /* More bypasses and apparently another HDMI/LVDS selector. */
500 regmap_update_bits(map: priv->regmap, reg: 0x28, mask: VGACLK_BP | HM_LV_SEL,
501 val: VGACLK_BP | HM_LV_SEL);
502 regmap_update_bits(map: priv->regmap, reg: 0x2a, mask: HDMICLK_BP | HDMI_BP,
503 val: HDMICLK_BP | HDMI_BP);
504
505 /*
506 * Page 4
507 */
508 regmap_write(map: priv->regmap, reg: 0x03, val: 0x04);
509
510 /* Output clock. */
511 regmap_write(map: priv->regmap, reg: 0x10, val: mode->clock >> 16);
512 regmap_write(map: priv->regmap, reg: 0x11, val: mode->clock >> 8);
513 regmap_write(map: priv->regmap, reg: 0x12, val: mode->clock);
514}
515
516static const struct drm_bridge_funcs ch7033_bridge_funcs = {
517 .attach = ch7033_bridge_attach,
518 .detach = ch7033_bridge_detach,
519 .mode_valid = ch7033_bridge_mode_valid,
520 .disable = ch7033_bridge_disable,
521 .enable = ch7033_bridge_enable,
522 .mode_set = ch7033_bridge_mode_set,
523};
524
525static const struct regmap_config ch7033_regmap_config = {
526 .reg_bits = 8,
527 .val_bits = 8,
528 .max_register = 0x7f,
529};
530
531static int ch7033_probe(struct i2c_client *client)
532{
533 struct device *dev = &client->dev;
534 struct ch7033_priv *priv;
535 unsigned int val;
536 int ret;
537
538 priv = devm_kzalloc(dev, size: sizeof(*priv), GFP_KERNEL);
539 if (!priv)
540 return -ENOMEM;
541
542 dev_set_drvdata(dev, data: priv);
543
544 ret = drm_of_find_panel_or_bridge(np: dev->of_node, port: 1, endpoint: -1, NULL,
545 bridge: &priv->next_bridge);
546 if (ret)
547 return ret;
548
549 priv->regmap = devm_regmap_init_i2c(client, &ch7033_regmap_config);
550 if (IS_ERR(ptr: priv->regmap)) {
551 dev_err(&client->dev, "regmap init failed\n");
552 return PTR_ERR(ptr: priv->regmap);
553 }
554
555 ret = regmap_read(map: priv->regmap, reg: 0x00, val: &val);
556 if (ret < 0) {
557 dev_err(&client->dev, "error reading the model id: %d\n", ret);
558 return ret;
559 }
560 if ((val & 0xf7) != 0x56) {
561 dev_err(&client->dev, "the device is not a ch7033\n");
562 return -ENODEV;
563 }
564
565 regmap_write(map: priv->regmap, reg: 0x03, val: 0x04);
566 ret = regmap_read(map: priv->regmap, reg: 0x51, val: &val);
567 if (ret < 0) {
568 dev_err(&client->dev, "error reading the model id: %d\n", ret);
569 return ret;
570 }
571 if ((val & 0x0f) != 3) {
572 dev_err(&client->dev, "unknown revision %u\n", val);
573 return -ENODEV;
574 }
575
576 INIT_LIST_HEAD(list: &priv->bridge.list);
577 priv->bridge.funcs = &ch7033_bridge_funcs;
578 priv->bridge.of_node = dev->of_node;
579 drm_bridge_add(bridge: &priv->bridge);
580
581 dev_info(dev, "Chrontel CH7033 Video Encoder\n");
582 return 0;
583}
584
585static void ch7033_remove(struct i2c_client *client)
586{
587 struct device *dev = &client->dev;
588 struct ch7033_priv *priv = dev_get_drvdata(dev);
589
590 drm_bridge_remove(bridge: &priv->bridge);
591}
592
593static const struct of_device_id ch7033_dt_ids[] = {
594 { .compatible = "chrontel,ch7033", },
595 { }
596};
597MODULE_DEVICE_TABLE(of, ch7033_dt_ids);
598
599static const struct i2c_device_id ch7033_ids[] = {
600 { "ch7033", 0 },
601 { }
602};
603MODULE_DEVICE_TABLE(i2c, ch7033_ids);
604
605static struct i2c_driver ch7033_driver = {
606 .probe = ch7033_probe,
607 .remove = ch7033_remove,
608 .driver = {
609 .name = "ch7033",
610 .of_match_table = ch7033_dt_ids,
611 },
612 .id_table = ch7033_ids,
613};
614
615module_i2c_driver(ch7033_driver);
616
617MODULE_AUTHOR("Lubomir Rintel <lkundrak@v3.sk>");
618MODULE_DESCRIPTION("Chrontel CH7033 Video Encoder Driver");
619MODULE_LICENSE("GPL v2");
620

source code of linux/drivers/gpu/drm/bridge/chrontel-ch7033.c