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16#include <linux/module.h>
17#include <linux/clk.h>
18#include <linux/component.h>
19#include <drm/drmP.h>
20#include <drm/drm_fb_helper.h>
21#include <drm/drm_crtc_helper.h>
22#include <drm/drm_of.h>
23#include <drm/drm_panel.h>
24#include <linux/mfd/syscon.h>
25#include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
26#include <linux/of_device.h>
27#include <linux/of_graph.h>
28#include <video/of_display_timing.h>
29#include <video/of_videomode.h>
30#include <linux/regmap.h>
31#include <linux/videodev2.h>
32
33#include "imx-drm.h"
34
35#define DRIVER_NAME "imx-ldb"
36
37#define LDB_CH0_MODE_EN_TO_DI0 (1 << 0)
38#define LDB_CH0_MODE_EN_TO_DI1 (3 << 0)
39#define LDB_CH0_MODE_EN_MASK (3 << 0)
40#define LDB_CH1_MODE_EN_TO_DI0 (1 << 2)
41#define LDB_CH1_MODE_EN_TO_DI1 (3 << 2)
42#define LDB_CH1_MODE_EN_MASK (3 << 2)
43#define LDB_SPLIT_MODE_EN (1 << 4)
44#define LDB_DATA_WIDTH_CH0_24 (1 << 5)
45#define LDB_BIT_MAP_CH0_JEIDA (1 << 6)
46#define LDB_DATA_WIDTH_CH1_24 (1 << 7)
47#define LDB_BIT_MAP_CH1_JEIDA (1 << 8)
48#define LDB_DI0_VS_POL_ACT_LOW (1 << 9)
49#define LDB_DI1_VS_POL_ACT_LOW (1 << 10)
50#define LDB_BGREF_RMODE_INT (1 << 15)
51
52#define con_to_imx_ldb_ch(x) container_of(x, struct imx_ldb_channel, connector)
53#define enc_to_imx_ldb_ch(x) container_of(x, struct imx_ldb_channel, encoder)
54
55struct imx_ldb;
56
57struct imx_ldb_channel {
58 struct imx_ldb *ldb;
59 struct drm_connector connector;
60 struct drm_encoder encoder;
61 struct drm_panel *panel;
62 struct device_node *child;
63 struct i2c_adapter *ddc;
64 int chno;
65 void *edid;
66 int edid_len;
67 struct drm_display_mode mode;
68 int mode_valid;
69 int bus_format;
70};
71
72struct bus_mux {
73 int reg;
74 int shift;
75 int mask;
76};
77
78struct imx_ldb {
79 struct regmap *regmap;
80 struct device *dev;
81 struct imx_ldb_channel channel[2];
82 struct clk *clk[2];
83 struct clk *clk_sel[4];
84 struct clk *clk_parent[4];
85 struct clk *clk_pll[2];
86 u32 ldb_ctrl;
87 const struct bus_mux *lvds_mux;
88};
89
90static enum drm_connector_status imx_ldb_connector_detect(
91 struct drm_connector *connector, bool force)
92{
93 return connector_status_connected;
94}
95
96static int imx_ldb_connector_get_modes(struct drm_connector *connector)
97{
98 struct imx_ldb_channel *imx_ldb_ch = con_to_imx_ldb_ch(connector);
99 int num_modes = 0;
100
101 if (imx_ldb_ch->panel && imx_ldb_ch->panel->funcs &&
102 imx_ldb_ch->panel->funcs->get_modes) {
103 struct drm_display_info *di = &connector->display_info;
104
105 num_modes = imx_ldb_ch->panel->funcs->get_modes(imx_ldb_ch->panel);
106 if (!imx_ldb_ch->bus_format && di->num_bus_formats)
107 imx_ldb_ch->bus_format = di->bus_formats[0];
108 if (num_modes > 0)
109 return num_modes;
110 }
111
112 if (!imx_ldb_ch->edid && imx_ldb_ch->ddc)
113 imx_ldb_ch->edid = drm_get_edid(connector, imx_ldb_ch->ddc);
114
115 if (imx_ldb_ch->edid) {
116 drm_mode_connector_update_edid_property(connector,
117 imx_ldb_ch->edid);
118 num_modes = drm_add_edid_modes(connector, imx_ldb_ch->edid);
119 }
120
121 if (imx_ldb_ch->mode_valid) {
122 struct drm_display_mode *mode;
123
124 mode = drm_mode_create(connector->dev);
125 if (!mode)
126 return -EINVAL;
127 drm_mode_copy(mode, &imx_ldb_ch->mode);
128 mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
129 drm_mode_probed_add(connector, mode);
130 num_modes++;
131 }
132
133 return num_modes;
134}
135
136static struct drm_encoder *imx_ldb_connector_best_encoder(
137 struct drm_connector *connector)
138{
139 struct imx_ldb_channel *imx_ldb_ch = con_to_imx_ldb_ch(connector);
140
141 return &imx_ldb_ch->encoder;
142}
143
144static void imx_ldb_encoder_dpms(struct drm_encoder *encoder, int mode)
145{
146}
147
148static void imx_ldb_set_clock(struct imx_ldb *ldb, int mux, int chno,
149 unsigned long serial_clk, unsigned long di_clk)
150{
151 int ret;
152
153 dev_dbg(ldb->dev, "%s: now: %ld want: %ld\n", __func__,
154 clk_get_rate(ldb->clk_pll[chno]), serial_clk);
155 clk_set_rate(ldb->clk_pll[chno], serial_clk);
156
157 dev_dbg(ldb->dev, "%s after: %ld\n", __func__,
158 clk_get_rate(ldb->clk_pll[chno]));
159
160 dev_dbg(ldb->dev, "%s: now: %ld want: %ld\n", __func__,
161 clk_get_rate(ldb->clk[chno]),
162 (long int)di_clk);
163 clk_set_rate(ldb->clk[chno], di_clk);
164
165 dev_dbg(ldb->dev, "%s after: %ld\n", __func__,
166 clk_get_rate(ldb->clk[chno]));
167
168
169 ret = clk_set_parent(ldb->clk_sel[mux], ldb->clk[chno]);
170 if (ret)
171 dev_err(ldb->dev,
172 "unable to set di%d parent clock to ldb_di%d\n", mux,
173 chno);
174}
175
176static void imx_ldb_encoder_prepare(struct drm_encoder *encoder)
177{
178 struct imx_ldb_channel *imx_ldb_ch = enc_to_imx_ldb_ch(encoder);
179 struct imx_ldb *ldb = imx_ldb_ch->ldb;
180 int dual = ldb->ldb_ctrl & LDB_SPLIT_MODE_EN;
181 u32 bus_format;
182
183 switch (imx_ldb_ch->bus_format) {
184 default:
185 dev_warn(ldb->dev,
186 "could not determine data mapping, default to 18-bit \"spwg\"\n");
187
188 case MEDIA_BUS_FMT_RGB666_1X7X3_SPWG:
189 bus_format = MEDIA_BUS_FMT_RGB666_1X18;
190 break;
191 case MEDIA_BUS_FMT_RGB888_1X7X4_SPWG:
192 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
193 if (imx_ldb_ch->chno == 0 || dual)
194 ldb->ldb_ctrl |= LDB_DATA_WIDTH_CH0_24;
195 if (imx_ldb_ch->chno == 1 || dual)
196 ldb->ldb_ctrl |= LDB_DATA_WIDTH_CH1_24;
197 break;
198 case MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA:
199 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
200 if (imx_ldb_ch->chno == 0 || dual)
201 ldb->ldb_ctrl |= LDB_DATA_WIDTH_CH0_24 |
202 LDB_BIT_MAP_CH0_JEIDA;
203 if (imx_ldb_ch->chno == 1 || dual)
204 ldb->ldb_ctrl |= LDB_DATA_WIDTH_CH1_24 |
205 LDB_BIT_MAP_CH1_JEIDA;
206 break;
207 }
208
209 imx_drm_set_bus_format(encoder, bus_format);
210}
211
212static void imx_ldb_encoder_commit(struct drm_encoder *encoder)
213{
214 struct imx_ldb_channel *imx_ldb_ch = enc_to_imx_ldb_ch(encoder);
215 struct imx_ldb *ldb = imx_ldb_ch->ldb;
216 int dual = ldb->ldb_ctrl & LDB_SPLIT_MODE_EN;
217 int mux = drm_of_encoder_active_port_id(imx_ldb_ch->child, encoder);
218
219 drm_panel_prepare(imx_ldb_ch->panel);
220
221 if (dual) {
222 clk_prepare_enable(ldb->clk[0]);
223 clk_prepare_enable(ldb->clk[1]);
224 }
225
226 if (imx_ldb_ch == &ldb->channel[0] || dual) {
227 ldb->ldb_ctrl &= ~LDB_CH0_MODE_EN_MASK;
228 if (mux == 0 || ldb->lvds_mux)
229 ldb->ldb_ctrl |= LDB_CH0_MODE_EN_TO_DI0;
230 else if (mux == 1)
231 ldb->ldb_ctrl |= LDB_CH0_MODE_EN_TO_DI1;
232 }
233 if (imx_ldb_ch == &ldb->channel[1] || dual) {
234 ldb->ldb_ctrl &= ~LDB_CH1_MODE_EN_MASK;
235 if (mux == 1 || ldb->lvds_mux)
236 ldb->ldb_ctrl |= LDB_CH1_MODE_EN_TO_DI1;
237 else if (mux == 0)
238 ldb->ldb_ctrl |= LDB_CH1_MODE_EN_TO_DI0;
239 }
240
241 if (ldb->lvds_mux) {
242 const struct bus_mux *lvds_mux = NULL;
243
244 if (imx_ldb_ch == &ldb->channel[0])
245 lvds_mux = &ldb->lvds_mux[0];
246 else if (imx_ldb_ch == &ldb->channel[1])
247 lvds_mux = &ldb->lvds_mux[1];
248
249 regmap_update_bits(ldb->regmap, lvds_mux->reg, lvds_mux->mask,
250 mux << lvds_mux->shift);
251 }
252
253 regmap_write(ldb->regmap, IOMUXC_GPR2, ldb->ldb_ctrl);
254
255 drm_panel_enable(imx_ldb_ch->panel);
256}
257
258static void imx_ldb_encoder_mode_set(struct drm_encoder *encoder,
259 struct drm_display_mode *orig_mode,
260 struct drm_display_mode *mode)
261{
262 struct imx_ldb_channel *imx_ldb_ch = enc_to_imx_ldb_ch(encoder);
263 struct imx_ldb *ldb = imx_ldb_ch->ldb;
264 int dual = ldb->ldb_ctrl & LDB_SPLIT_MODE_EN;
265 unsigned long serial_clk;
266 unsigned long di_clk = mode->clock * 1000;
267 int mux = drm_of_encoder_active_port_id(imx_ldb_ch->child, encoder);
268
269 if (mode->clock > 170000) {
270 dev_warn(ldb->dev,
271 "%s: mode exceeds 170 MHz pixel clock\n", __func__);
272 }
273 if (mode->clock > 85000 && !dual) {
274 dev_warn(ldb->dev,
275 "%s: mode exceeds 85 MHz pixel clock\n", __func__);
276 }
277
278 if (dual) {
279 serial_clk = 3500UL * mode->clock;
280 imx_ldb_set_clock(ldb, mux, 0, serial_clk, di_clk);
281 imx_ldb_set_clock(ldb, mux, 1, serial_clk, di_clk);
282 } else {
283 serial_clk = 7000UL * mode->clock;
284 imx_ldb_set_clock(ldb, mux, imx_ldb_ch->chno, serial_clk,
285 di_clk);
286 }
287
288
289 if (imx_ldb_ch == &ldb->channel[0]) {
290 if (mode->flags & DRM_MODE_FLAG_NVSYNC)
291 ldb->ldb_ctrl |= LDB_DI0_VS_POL_ACT_LOW;
292 else if (mode->flags & DRM_MODE_FLAG_PVSYNC)
293 ldb->ldb_ctrl &= ~LDB_DI0_VS_POL_ACT_LOW;
294 }
295 if (imx_ldb_ch == &ldb->channel[1]) {
296 if (mode->flags & DRM_MODE_FLAG_NVSYNC)
297 ldb->ldb_ctrl |= LDB_DI1_VS_POL_ACT_LOW;
298 else if (mode->flags & DRM_MODE_FLAG_PVSYNC)
299 ldb->ldb_ctrl &= ~LDB_DI1_VS_POL_ACT_LOW;
300 }
301}
302
303static void imx_ldb_encoder_disable(struct drm_encoder *encoder)
304{
305 struct imx_ldb_channel *imx_ldb_ch = enc_to_imx_ldb_ch(encoder);
306 struct imx_ldb *ldb = imx_ldb_ch->ldb;
307 int mux, ret;
308
309
310
311
312
313
314 if (imx_ldb_ch == &ldb->channel[0] &&
315 (ldb->ldb_ctrl & LDB_CH0_MODE_EN_MASK) == 0)
316 return;
317 else if (imx_ldb_ch == &ldb->channel[1] &&
318 (ldb->ldb_ctrl & LDB_CH1_MODE_EN_MASK) == 0)
319 return;
320
321 drm_panel_disable(imx_ldb_ch->panel);
322
323 if (imx_ldb_ch == &ldb->channel[0])
324 ldb->ldb_ctrl &= ~LDB_CH0_MODE_EN_MASK;
325 else if (imx_ldb_ch == &ldb->channel[1])
326 ldb->ldb_ctrl &= ~LDB_CH1_MODE_EN_MASK;
327
328 regmap_write(ldb->regmap, IOMUXC_GPR2, ldb->ldb_ctrl);
329
330 if (ldb->ldb_ctrl & LDB_SPLIT_MODE_EN) {
331 clk_disable_unprepare(ldb->clk[0]);
332 clk_disable_unprepare(ldb->clk[1]);
333 }
334
335 if (ldb->lvds_mux) {
336 const struct bus_mux *lvds_mux = NULL;
337
338 if (imx_ldb_ch == &ldb->channel[0])
339 lvds_mux = &ldb->lvds_mux[0];
340 else if (imx_ldb_ch == &ldb->channel[1])
341 lvds_mux = &ldb->lvds_mux[1];
342
343 regmap_read(ldb->regmap, lvds_mux->reg, &mux);
344 mux &= lvds_mux->mask;
345 mux >>= lvds_mux->shift;
346 } else {
347 mux = (imx_ldb_ch == &ldb->channel[0]) ? 0 : 1;
348 }
349
350
351 ret = clk_set_parent(ldb->clk_sel[mux], ldb->clk_parent[mux]);
352 if (ret)
353 dev_err(ldb->dev,
354 "unable to set di%d parent clock to original parent\n",
355 mux);
356
357 drm_panel_unprepare(imx_ldb_ch->panel);
358}
359
360static const struct drm_connector_funcs imx_ldb_connector_funcs = {
361 .dpms = drm_helper_connector_dpms,
362 .fill_modes = drm_helper_probe_single_connector_modes,
363 .detect = imx_ldb_connector_detect,
364 .destroy = imx_drm_connector_destroy,
365};
366
367static const struct drm_connector_helper_funcs imx_ldb_connector_helper_funcs = {
368 .get_modes = imx_ldb_connector_get_modes,
369 .best_encoder = imx_ldb_connector_best_encoder,
370};
371
372static const struct drm_encoder_funcs imx_ldb_encoder_funcs = {
373 .destroy = imx_drm_encoder_destroy,
374};
375
376static const struct drm_encoder_helper_funcs imx_ldb_encoder_helper_funcs = {
377 .dpms = imx_ldb_encoder_dpms,
378 .prepare = imx_ldb_encoder_prepare,
379 .commit = imx_ldb_encoder_commit,
380 .mode_set = imx_ldb_encoder_mode_set,
381 .disable = imx_ldb_encoder_disable,
382};
383
384static int imx_ldb_get_clk(struct imx_ldb *ldb, int chno)
385{
386 char clkname[16];
387
388 snprintf(clkname, sizeof(clkname), "di%d", chno);
389 ldb->clk[chno] = devm_clk_get(ldb->dev, clkname);
390 if (IS_ERR(ldb->clk[chno]))
391 return PTR_ERR(ldb->clk[chno]);
392
393 snprintf(clkname, sizeof(clkname), "di%d_pll", chno);
394 ldb->clk_pll[chno] = devm_clk_get(ldb->dev, clkname);
395
396 return PTR_ERR_OR_ZERO(ldb->clk_pll[chno]);
397}
398
399static int imx_ldb_register(struct drm_device *drm,
400 struct imx_ldb_channel *imx_ldb_ch)
401{
402 struct imx_ldb *ldb = imx_ldb_ch->ldb;
403 int ret;
404
405 ret = imx_drm_encoder_parse_of(drm, &imx_ldb_ch->encoder,
406 imx_ldb_ch->child);
407 if (ret)
408 return ret;
409
410 ret = imx_ldb_get_clk(ldb, imx_ldb_ch->chno);
411 if (ret)
412 return ret;
413
414 if (ldb->ldb_ctrl & LDB_SPLIT_MODE_EN) {
415 ret = imx_ldb_get_clk(ldb, 1);
416 if (ret)
417 return ret;
418 }
419
420 drm_encoder_helper_add(&imx_ldb_ch->encoder,
421 &imx_ldb_encoder_helper_funcs);
422 drm_encoder_init(drm, &imx_ldb_ch->encoder, &imx_ldb_encoder_funcs,
423 DRM_MODE_ENCODER_LVDS, NULL);
424
425 drm_connector_helper_add(&imx_ldb_ch->connector,
426 &imx_ldb_connector_helper_funcs);
427 drm_connector_init(drm, &imx_ldb_ch->connector,
428 &imx_ldb_connector_funcs, DRM_MODE_CONNECTOR_LVDS);
429
430 if (imx_ldb_ch->panel)
431 drm_panel_attach(imx_ldb_ch->panel, &imx_ldb_ch->connector);
432
433 drm_mode_connector_attach_encoder(&imx_ldb_ch->connector,
434 &imx_ldb_ch->encoder);
435
436 return 0;
437}
438
439enum {
440 LVDS_BIT_MAP_SPWG,
441 LVDS_BIT_MAP_JEIDA
442};
443
444struct imx_ldb_bit_mapping {
445 u32 bus_format;
446 u32 datawidth;
447 const char * const mapping;
448};
449
450static const struct imx_ldb_bit_mapping imx_ldb_bit_mappings[] = {
451 { MEDIA_BUS_FMT_RGB666_1X7X3_SPWG, 18, "spwg" },
452 { MEDIA_BUS_FMT_RGB888_1X7X4_SPWG, 24, "spwg" },
453 { MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA, 24, "jeida" },
454};
455
456static u32 of_get_bus_format(struct device *dev, struct device_node *np)
457{
458 const char *bm;
459 u32 datawidth = 0;
460 int ret, i;
461
462 ret = of_property_read_string(np, "fsl,data-mapping", &bm);
463 if (ret < 0)
464 return ret;
465
466 of_property_read_u32(np, "fsl,data-width", &datawidth);
467
468 for (i = 0; i < ARRAY_SIZE(imx_ldb_bit_mappings); i++) {
469 if (!strcasecmp(bm, imx_ldb_bit_mappings[i].mapping) &&
470 datawidth == imx_ldb_bit_mappings[i].datawidth)
471 return imx_ldb_bit_mappings[i].bus_format;
472 }
473
474 dev_err(dev, "invalid data mapping: %d-bit \"%s\"\n", datawidth, bm);
475
476 return -ENOENT;
477}
478
479static struct bus_mux imx6q_lvds_mux[2] = {
480 {
481 .reg = IOMUXC_GPR3,
482 .shift = 6,
483 .mask = IMX6Q_GPR3_LVDS0_MUX_CTL_MASK,
484 }, {
485 .reg = IOMUXC_GPR3,
486 .shift = 8,
487 .mask = IMX6Q_GPR3_LVDS1_MUX_CTL_MASK,
488 }
489};
490
491
492
493
494
495
496
497static const struct of_device_id imx_ldb_dt_ids[] = {
498 { .compatible = "fsl,imx6q-ldb", .data = imx6q_lvds_mux, },
499 { .compatible = "fsl,imx53-ldb", .data = NULL, },
500 { }
501};
502MODULE_DEVICE_TABLE(of, imx_ldb_dt_ids);
503
504static int imx_ldb_bind(struct device *dev, struct device *master, void *data)
505{
506 struct drm_device *drm = data;
507 struct device_node *np = dev->of_node;
508 const struct of_device_id *of_id =
509 of_match_device(imx_ldb_dt_ids, dev);
510 struct device_node *child;
511 const u8 *edidp;
512 struct imx_ldb *imx_ldb;
513 int dual;
514 int ret;
515 int i;
516
517 imx_ldb = devm_kzalloc(dev, sizeof(*imx_ldb), GFP_KERNEL);
518 if (!imx_ldb)
519 return -ENOMEM;
520
521 imx_ldb->regmap = syscon_regmap_lookup_by_phandle(np, "gpr");
522 if (IS_ERR(imx_ldb->regmap)) {
523 dev_err(dev, "failed to get parent regmap\n");
524 return PTR_ERR(imx_ldb->regmap);
525 }
526
527 imx_ldb->dev = dev;
528
529 if (of_id)
530 imx_ldb->lvds_mux = of_id->data;
531
532 dual = of_property_read_bool(np, "fsl,dual-channel");
533 if (dual)
534 imx_ldb->ldb_ctrl |= LDB_SPLIT_MODE_EN;
535
536
537
538
539
540
541
542
543 for (i = 0; i < 4; i++) {
544 char clkname[16];
545
546 sprintf(clkname, "di%d_sel", i);
547 imx_ldb->clk_sel[i] = devm_clk_get(imx_ldb->dev, clkname);
548 if (IS_ERR(imx_ldb->clk_sel[i])) {
549 ret = PTR_ERR(imx_ldb->clk_sel[i]);
550 imx_ldb->clk_sel[i] = NULL;
551 break;
552 }
553
554 imx_ldb->clk_parent[i] = clk_get_parent(imx_ldb->clk_sel[i]);
555 }
556 if (i == 0)
557 return ret;
558
559 for_each_child_of_node(np, child) {
560 struct imx_ldb_channel *channel;
561 struct device_node *ddc_node;
562 struct device_node *ep;
563
564 ret = of_property_read_u32(child, "reg", &i);
565 if (ret || i < 0 || i > 1)
566 return -EINVAL;
567
568 if (dual && i > 0) {
569 dev_warn(dev, "dual-channel mode, ignoring second output\n");
570 continue;
571 }
572
573 if (!of_device_is_available(child))
574 continue;
575
576 channel = &imx_ldb->channel[i];
577 channel->ldb = imx_ldb;
578 channel->chno = i;
579 channel->child = child;
580
581
582
583
584
585 ep = of_graph_get_endpoint_by_regs(child,
586 imx_ldb->lvds_mux ? 4 : 2,
587 -1);
588 if (ep) {
589 struct device_node *remote;
590
591 remote = of_graph_get_remote_port_parent(ep);
592 of_node_put(ep);
593 if (remote)
594 channel->panel = of_drm_find_panel(remote);
595 else
596 return -EPROBE_DEFER;
597 of_node_put(remote);
598 if (!channel->panel) {
599 dev_err(dev, "panel not found: %s\n",
600 remote->full_name);
601 return -EPROBE_DEFER;
602 }
603 }
604
605 ddc_node = of_parse_phandle(child, "ddc-i2c-bus", 0);
606 if (ddc_node) {
607 channel->ddc = of_find_i2c_adapter_by_node(ddc_node);
608 of_node_put(ddc_node);
609 if (!channel->ddc) {
610 dev_warn(dev, "failed to get ddc i2c adapter\n");
611 return -EPROBE_DEFER;
612 }
613 }
614
615 if (!channel->ddc) {
616
617 dev_dbg(dev, "no ddc available\n");
618
619 edidp = of_get_property(child, "edid",
620 &channel->edid_len);
621 if (edidp) {
622 channel->edid = kmemdup(edidp,
623 channel->edid_len,
624 GFP_KERNEL);
625 } else if (!channel->panel) {
626
627 ret = of_get_drm_display_mode(child,
628 &channel->mode,
629 OF_USE_NATIVE_MODE);
630 if (!ret)
631 channel->mode_valid = 1;
632 }
633 }
634
635 channel->bus_format = of_get_bus_format(dev, child);
636 if (channel->bus_format == -EINVAL) {
637
638
639
640
641 if (channel->panel && channel->panel->funcs &&
642 channel->panel->funcs->get_modes)
643 channel->bus_format = 0;
644 }
645 if (channel->bus_format < 0) {
646 dev_err(dev, "could not determine data mapping: %d\n",
647 channel->bus_format);
648 return channel->bus_format;
649 }
650
651 ret = imx_ldb_register(drm, channel);
652 if (ret)
653 return ret;
654 }
655
656 dev_set_drvdata(dev, imx_ldb);
657
658 return 0;
659}
660
661static void imx_ldb_unbind(struct device *dev, struct device *master,
662 void *data)
663{
664 struct imx_ldb *imx_ldb = dev_get_drvdata(dev);
665 int i;
666
667 for (i = 0; i < 2; i++) {
668 struct imx_ldb_channel *channel = &imx_ldb->channel[i];
669
670 if (!channel->connector.funcs)
671 continue;
672
673 channel->connector.funcs->destroy(&channel->connector);
674 channel->encoder.funcs->destroy(&channel->encoder);
675
676 kfree(channel->edid);
677 i2c_put_adapter(channel->ddc);
678 }
679}
680
681static const struct component_ops imx_ldb_ops = {
682 .bind = imx_ldb_bind,
683 .unbind = imx_ldb_unbind,
684};
685
686static int imx_ldb_probe(struct platform_device *pdev)
687{
688 return component_add(&pdev->dev, &imx_ldb_ops);
689}
690
691static int imx_ldb_remove(struct platform_device *pdev)
692{
693 component_del(&pdev->dev, &imx_ldb_ops);
694 return 0;
695}
696
697static struct platform_driver imx_ldb_driver = {
698 .probe = imx_ldb_probe,
699 .remove = imx_ldb_remove,
700 .driver = {
701 .of_match_table = imx_ldb_dt_ids,
702 .name = DRIVER_NAME,
703 },
704};
705
706module_platform_driver(imx_ldb_driver);
707
708MODULE_DESCRIPTION("i.MX LVDS driver");
709MODULE_AUTHOR("Sascha Hauer, Pengutronix");
710MODULE_LICENSE("GPL");
711MODULE_ALIAS("platform:" DRIVER_NAME);
712
