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1/*
2 * i.MX drm driver - Television Encoder (TVEv2)
3 *
4 * Copyright (C) 2013 Philipp Zabel, Pengutronix
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version 2
9 * of the License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 */
15
16#include <linux/clk.h>
17#include <linux/clk-provider.h>
18#include <linux/component.h>
19#include <linux/module.h>
20#include <linux/i2c.h>
21#include <linux/regmap.h>
22#include <linux/regulator/consumer.h>
23#include <linux/spinlock.h>
24#include <linux/videodev2.h>
25#include <drm/drmP.h>
26#include <drm/drm_fb_helper.h>
27#include <drm/drm_crtc_helper.h>
28#include <video/imx-ipu-v3.h>
29
30#include "imx-drm.h"
31
32#define TVE_COM_CONF_REG 0x00
33#define TVE_TVDAC0_CONT_REG 0x28
34#define TVE_TVDAC1_CONT_REG 0x2c
35#define TVE_TVDAC2_CONT_REG 0x30
36#define TVE_CD_CONT_REG 0x34
37#define TVE_INT_CONT_REG 0x64
38#define TVE_STAT_REG 0x68
39#define TVE_TST_MODE_REG 0x6c
40#define TVE_MV_CONT_REG 0xdc
41
42/* TVE_COM_CONF_REG */
43#define TVE_SYNC_CH_2_EN BIT(22)
44#define TVE_SYNC_CH_1_EN BIT(21)
45#define TVE_SYNC_CH_0_EN BIT(20)
46#define TVE_TV_OUT_MODE_MASK (0x7 << 12)
47#define TVE_TV_OUT_DISABLE (0x0 << 12)
48#define TVE_TV_OUT_CVBS_0 (0x1 << 12)
49#define TVE_TV_OUT_CVBS_2 (0x2 << 12)
50#define TVE_TV_OUT_CVBS_0_2 (0x3 << 12)
51#define TVE_TV_OUT_SVIDEO_0_1 (0x4 << 12)
52#define TVE_TV_OUT_SVIDEO_0_1_CVBS2_2 (0x5 << 12)
53#define TVE_TV_OUT_YPBPR (0x6 << 12)
54#define TVE_TV_OUT_RGB (0x7 << 12)
55#define TVE_TV_STAND_MASK (0xf << 8)
56#define TVE_TV_STAND_HD_1080P30 (0xc << 8)
57#define TVE_P2I_CONV_EN BIT(7)
58#define TVE_INP_VIDEO_FORM BIT(6)
59#define TVE_INP_YCBCR_422 (0x0 << 6)
60#define TVE_INP_YCBCR_444 (0x1 << 6)
61#define TVE_DATA_SOURCE_MASK (0x3 << 4)
62#define TVE_DATA_SOURCE_BUS1 (0x0 << 4)
63#define TVE_DATA_SOURCE_BUS2 (0x1 << 4)
64#define TVE_DATA_SOURCE_EXT (0x2 << 4)
65#define TVE_DATA_SOURCE_TESTGEN (0x3 << 4)
66#define TVE_IPU_CLK_EN_OFS 3
67#define TVE_IPU_CLK_EN BIT(3)
68#define TVE_DAC_SAMP_RATE_OFS 1
69#define TVE_DAC_SAMP_RATE_WIDTH 2
70#define TVE_DAC_SAMP_RATE_MASK (0x3 << 1)
71#define TVE_DAC_FULL_RATE (0x0 << 1)
72#define TVE_DAC_DIV2_RATE (0x1 << 1)
73#define TVE_DAC_DIV4_RATE (0x2 << 1)
74#define TVE_EN BIT(0)
75
76/* TVE_TVDACx_CONT_REG */
77#define TVE_TVDAC_GAIN_MASK (0x3f << 0)
78
79/* TVE_CD_CONT_REG */
80#define TVE_CD_CH_2_SM_EN BIT(22)
81#define TVE_CD_CH_1_SM_EN BIT(21)
82#define TVE_CD_CH_0_SM_EN BIT(20)
83#define TVE_CD_CH_2_LM_EN BIT(18)
84#define TVE_CD_CH_1_LM_EN BIT(17)
85#define TVE_CD_CH_0_LM_EN BIT(16)
86#define TVE_CD_CH_2_REF_LVL BIT(10)
87#define TVE_CD_CH_1_REF_LVL BIT(9)
88#define TVE_CD_CH_0_REF_LVL BIT(8)
89#define TVE_CD_EN BIT(0)
90
91/* TVE_INT_CONT_REG */
92#define TVE_FRAME_END_IEN BIT(13)
93#define TVE_CD_MON_END_IEN BIT(2)
94#define TVE_CD_SM_IEN BIT(1)
95#define TVE_CD_LM_IEN BIT(0)
96
97/* TVE_TST_MODE_REG */
98#define TVE_TVDAC_TEST_MODE_MASK (0x7 << 0)
99
100#define con_to_tve(x) container_of(x, struct imx_tve, connector)
101#define enc_to_tve(x) container_of(x, struct imx_tve, encoder)
102
103enum {
104 TVE_MODE_TVOUT,
105 TVE_MODE_VGA,
106};
107
108struct imx_tve {
109 struct drm_connector connector;
110 struct drm_encoder encoder;
111 struct device *dev;
112 spinlock_t lock; /* register lock */
113 bool enabled;
114 int mode;
115
116 struct regmap *regmap;
117 struct regulator *dac_reg;
118 struct i2c_adapter *ddc;
119 struct clk *clk;
120 struct clk *di_sel_clk;
121 struct clk_hw clk_hw_di;
122 struct clk *di_clk;
123 int vsync_pin;
124 int hsync_pin;
125};
126
127static void tve_lock(void *__tve)
128__acquires(&tve->lock)
129{
130 struct imx_tve *tve = __tve;
131
132 spin_lock(&tve->lock);
133}
134
135static void tve_unlock(void *__tve)
136__releases(&tve->lock)
137{
138 struct imx_tve *tve = __tve;
139
140 spin_unlock(&tve->lock);
141}
142
143static void tve_enable(struct imx_tve *tve)
144{
145 int ret;
146
147 if (!tve->enabled) {
148 tve->enabled = true;
149 clk_prepare_enable(tve->clk);
150 ret = regmap_update_bits(tve->regmap, TVE_COM_CONF_REG,
151 TVE_IPU_CLK_EN | TVE_EN,
152 TVE_IPU_CLK_EN | TVE_EN);
153 }
154
155 /* clear interrupt status register */
156 regmap_write(tve->regmap, TVE_STAT_REG, 0xffffffff);
157
158 /* cable detection irq disabled in VGA mode, enabled in TVOUT mode */
159 if (tve->mode == TVE_MODE_VGA)
160 regmap_write(tve->regmap, TVE_INT_CONT_REG, 0);
161 else
162 regmap_write(tve->regmap, TVE_INT_CONT_REG,
163 TVE_CD_SM_IEN |
164 TVE_CD_LM_IEN |
165 TVE_CD_MON_END_IEN);
166}
167
168static void tve_disable(struct imx_tve *tve)
169{
170 int ret;
171
172 if (tve->enabled) {
173 tve->enabled = false;
174 ret = regmap_update_bits(tve->regmap, TVE_COM_CONF_REG,
175 TVE_IPU_CLK_EN | TVE_EN, 0);
176 clk_disable_unprepare(tve->clk);
177 }
178}
179
180static int tve_setup_tvout(struct imx_tve *tve)
181{
182 return -ENOTSUPP;
183}
184
185static int tve_setup_vga(struct imx_tve *tve)
186{
187 unsigned int mask;
188 unsigned int val;
189 int ret;
190
191 /* set gain to (1 + 10/128) to provide 0.7V peak-to-peak amplitude */
192 ret = regmap_update_bits(tve->regmap, TVE_TVDAC0_CONT_REG,
193 TVE_TVDAC_GAIN_MASK, 0x0a);
194 if (ret)
195 return ret;
196
197 ret = regmap_update_bits(tve->regmap, TVE_TVDAC1_CONT_REG,
198 TVE_TVDAC_GAIN_MASK, 0x0a);
199 if (ret)
200 return ret;
201
202 ret = regmap_update_bits(tve->regmap, TVE_TVDAC2_CONT_REG,
203 TVE_TVDAC_GAIN_MASK, 0x0a);
204 if (ret)
205 return ret;
206
207 /* set configuration register */
208 mask = TVE_DATA_SOURCE_MASK | TVE_INP_VIDEO_FORM;
209 val = TVE_DATA_SOURCE_BUS2 | TVE_INP_YCBCR_444;
210 mask |= TVE_TV_STAND_MASK | TVE_P2I_CONV_EN;
211 val |= TVE_TV_STAND_HD_1080P30 | 0;
212 mask |= TVE_TV_OUT_MODE_MASK | TVE_SYNC_CH_0_EN;
213 val |= TVE_TV_OUT_RGB | TVE_SYNC_CH_0_EN;
214 ret = regmap_update_bits(tve->regmap, TVE_COM_CONF_REG, mask, val);
215 if (ret)
216 return ret;
217
218 /* set test mode (as documented) */
219 return regmap_update_bits(tve->regmap, TVE_TST_MODE_REG,
220 TVE_TVDAC_TEST_MODE_MASK, 1);
221}
222
223static enum drm_connector_status imx_tve_connector_detect(
224 struct drm_connector *connector, bool force)
225{
226 return connector_status_connected;
227}
228
229static int imx_tve_connector_get_modes(struct drm_connector *connector)
230{
231 struct imx_tve *tve = con_to_tve(connector);
232 struct edid *edid;
233 int ret = 0;
234
235 if (!tve->ddc)
236 return 0;
237
238 edid = drm_get_edid(connector, tve->ddc);
239 if (edid) {
240 drm_mode_connector_update_edid_property(connector, edid);
241 ret = drm_add_edid_modes(connector, edid);
242 kfree(edid);
243 }
244
245 return ret;
246}
247
248static int imx_tve_connector_mode_valid(struct drm_connector *connector,
249 struct drm_display_mode *mode)
250{
251 struct imx_tve *tve = con_to_tve(connector);
252 unsigned long rate;
253
254 /* pixel clock with 2x oversampling */
255 rate = clk_round_rate(tve->clk, 2000UL * mode->clock) / 2000;
256 if (rate == mode->clock)
257 return MODE_OK;
258
259 /* pixel clock without oversampling */
260 rate = clk_round_rate(tve->clk, 1000UL * mode->clock) / 1000;
261 if (rate == mode->clock)
262 return MODE_OK;
263
264 dev_warn(tve->dev, "ignoring mode %dx%d\n",
265 mode->hdisplay, mode->vdisplay);
266
267 return MODE_BAD;
268}
269
270static struct drm_encoder *imx_tve_connector_best_encoder(
271 struct drm_connector *connector)
272{
273 struct imx_tve *tve = con_to_tve(connector);
274
275 return &tve->encoder;
276}
277
278static void imx_tve_encoder_dpms(struct drm_encoder *encoder, int mode)
279{
280 struct imx_tve *tve = enc_to_tve(encoder);
281 int ret;
282
283 ret = regmap_update_bits(tve->regmap, TVE_COM_CONF_REG,
284 TVE_TV_OUT_MODE_MASK, TVE_TV_OUT_DISABLE);
285 if (ret < 0)
286 dev_err(tve->dev, "failed to disable TVOUT: %d\n", ret);
287}
288
289static void imx_tve_encoder_prepare(struct drm_encoder *encoder)
290{
291 struct imx_tve *tve = enc_to_tve(encoder);
292
293 tve_disable(tve);
294
295 switch (tve->mode) {
296 case TVE_MODE_VGA:
297 imx_drm_set_bus_format_pins(encoder, MEDIA_BUS_FMT_GBR888_1X24,
298 tve->hsync_pin, tve->vsync_pin);
299 break;
300 case TVE_MODE_TVOUT:
301 imx_drm_set_bus_format(encoder, MEDIA_BUS_FMT_YUV8_1X24);
302 break;
303 }
304}
305
306static void imx_tve_encoder_mode_set(struct drm_encoder *encoder,
307 struct drm_display_mode *orig_mode,
308 struct drm_display_mode *mode)
309{
310 struct imx_tve *tve = enc_to_tve(encoder);
311 unsigned long rounded_rate;
312 unsigned long rate;
313 int div = 1;
314 int ret;
315
316 /*
317 * FIXME
318 * we should try 4k * mode->clock first,
319 * and enable 4x oversampling for lower resolutions
320 */
321 rate = 2000UL * mode->clock;
322 clk_set_rate(tve->clk, rate);
323 rounded_rate = clk_get_rate(tve->clk);
324 if (rounded_rate >= rate)
325 div = 2;
326 clk_set_rate(tve->di_clk, rounded_rate / div);
327
328 ret = clk_set_parent(tve->di_sel_clk, tve->di_clk);
329 if (ret < 0) {
330 dev_err(tve->dev, "failed to set di_sel parent to tve_di: %d\n",
331 ret);
332 }
333
334 if (tve->mode == TVE_MODE_VGA)
335 ret = tve_setup_vga(tve);
336 else
337 ret = tve_setup_tvout(tve);
338 if (ret)
339 dev_err(tve->dev, "failed to set configuration: %d\n", ret);
340}
341
342static void imx_tve_encoder_commit(struct drm_encoder *encoder)
343{
344 struct imx_tve *tve = enc_to_tve(encoder);
345
346 tve_enable(tve);
347}
348
349static void imx_tve_encoder_disable(struct drm_encoder *encoder)
350{
351 struct imx_tve *tve = enc_to_tve(encoder);
352
353 tve_disable(tve);
354}
355
356static const struct drm_connector_funcs imx_tve_connector_funcs = {
357 .dpms = drm_helper_connector_dpms,
358 .fill_modes = drm_helper_probe_single_connector_modes,
359 .detect = imx_tve_connector_detect,
360 .destroy = imx_drm_connector_destroy,
361};
362
363static const struct drm_connector_helper_funcs imx_tve_connector_helper_funcs = {
364 .get_modes = imx_tve_connector_get_modes,
365 .best_encoder = imx_tve_connector_best_encoder,
366 .mode_valid = imx_tve_connector_mode_valid,
367};
368
369static const struct drm_encoder_funcs imx_tve_encoder_funcs = {
370 .destroy = imx_drm_encoder_destroy,
371};
372
373static const struct drm_encoder_helper_funcs imx_tve_encoder_helper_funcs = {
374 .dpms = imx_tve_encoder_dpms,
375 .prepare = imx_tve_encoder_prepare,
376 .mode_set = imx_tve_encoder_mode_set,
377 .commit = imx_tve_encoder_commit,
378 .disable = imx_tve_encoder_disable,
379};
380
381static irqreturn_t imx_tve_irq_handler(int irq, void *data)
382{
383 struct imx_tve *tve = data;
384 unsigned int val;
385
386 regmap_read(tve->regmap, TVE_STAT_REG, &val);
387
388 /* clear interrupt status register */
389 regmap_write(tve->regmap, TVE_STAT_REG, 0xffffffff);
390
391 return IRQ_HANDLED;
392}
393
394static unsigned long clk_tve_di_recalc_rate(struct clk_hw *hw,
395 unsigned long parent_rate)
396{
397 struct imx_tve *tve = container_of(hw, struct imx_tve, clk_hw_di);
398 unsigned int val;
399 int ret;
400
401 ret = regmap_read(tve->regmap, TVE_COM_CONF_REG, &val);
402 if (ret < 0)
403 return 0;
404
405 switch (val & TVE_DAC_SAMP_RATE_MASK) {
406 case TVE_DAC_DIV4_RATE:
407 return parent_rate / 4;
408 case TVE_DAC_DIV2_RATE:
409 return parent_rate / 2;
410 case TVE_DAC_FULL_RATE:
411 default:
412 return parent_rate;
413 }
414
415 return 0;
416}
417
418static long clk_tve_di_round_rate(struct clk_hw *hw, unsigned long rate,
419 unsigned long *prate)
420{
421 unsigned long div;
422
423 div = *prate / rate;
424 if (div >= 4)
425 return *prate / 4;
426 else if (div >= 2)
427 return *prate / 2;
428 return *prate;
429}
430
431static int clk_tve_di_set_rate(struct clk_hw *hw, unsigned long rate,
432 unsigned long parent_rate)
433{
434 struct imx_tve *tve = container_of(hw, struct imx_tve, clk_hw_di);
435 unsigned long div;
436 u32 val;
437 int ret;
438
439 div = parent_rate / rate;
440 if (div >= 4)
441 val = TVE_DAC_DIV4_RATE;
442 else if (div >= 2)
443 val = TVE_DAC_DIV2_RATE;
444 else
445 val = TVE_DAC_FULL_RATE;
446
447 ret = regmap_update_bits(tve->regmap, TVE_COM_CONF_REG,
448 TVE_DAC_SAMP_RATE_MASK, val);
449
450 if (ret < 0) {
451 dev_err(tve->dev, "failed to set divider: %d\n", ret);
452 return ret;
453 }
454
455 return 0;
456}
457
458static struct clk_ops clk_tve_di_ops = {
459 .round_rate = clk_tve_di_round_rate,
460 .set_rate = clk_tve_di_set_rate,
461 .recalc_rate = clk_tve_di_recalc_rate,
462};
463
464static int tve_clk_init(struct imx_tve *tve, void __iomem *base)
465{
466 const char *tve_di_parent[1];
467 struct clk_init_data init = {
468 .name = "tve_di",
469 .ops = &clk_tve_di_ops,
470 .num_parents = 1,
471 .flags = 0,
472 };
473
474 tve_di_parent[0] = __clk_get_name(tve->clk);
475 init.parent_names = (const char **)&tve_di_parent;
476
477 tve->clk_hw_di.init = &init;
478 tve->di_clk = clk_register(tve->dev, &tve->clk_hw_di);
479 if (IS_ERR(tve->di_clk)) {
480 dev_err(tve->dev, "failed to register TVE output clock: %ld\n",
481 PTR_ERR(tve->di_clk));
482 return PTR_ERR(tve->di_clk);
483 }
484
485 return 0;
486}
487
488static int imx_tve_register(struct drm_device *drm, struct imx_tve *tve)
489{
490 int encoder_type;
491 int ret;
492
493 encoder_type = tve->mode == TVE_MODE_VGA ?
494 DRM_MODE_ENCODER_DAC : DRM_MODE_ENCODER_TVDAC;
495
496 ret = imx_drm_encoder_parse_of(drm, &tve->encoder,
497 tve->dev->of_node);
498 if (ret)
499 return ret;
500
501 drm_encoder_helper_add(&tve->encoder, &imx_tve_encoder_helper_funcs);
502 drm_encoder_init(drm, &tve->encoder, &imx_tve_encoder_funcs,
503 encoder_type, NULL);
504
505 drm_connector_helper_add(&tve->connector,
506 &imx_tve_connector_helper_funcs);
507 drm_connector_init(drm, &tve->connector, &imx_tve_connector_funcs,
508 DRM_MODE_CONNECTOR_VGA);
509
510 drm_mode_connector_attach_encoder(&tve->connector, &tve->encoder);
511
512 return 0;
513}
514
515static bool imx_tve_readable_reg(struct device *dev, unsigned int reg)
516{
517 return (reg % 4 == 0) && (reg <= 0xdc);
518}
519
520static struct regmap_config tve_regmap_config = {
521 .reg_bits = 32,
522 .val_bits = 32,
523 .reg_stride = 4,
524
525 .readable_reg = imx_tve_readable_reg,
526
527 .lock = tve_lock,
528 .unlock = tve_unlock,
529
530 .max_register = 0xdc,
531};
532
533static const char * const imx_tve_modes[] = {
534 [TVE_MODE_TVOUT] = "tvout",
535 [TVE_MODE_VGA] = "vga",
536};
537
538static const int of_get_tve_mode(struct device_node *np)
539{
540 const char *bm;
541 int ret, i;
542
543 ret = of_property_read_string(np, "fsl,tve-mode", &bm);
544 if (ret < 0)
545 return ret;
546
547 for (i = 0; i < ARRAY_SIZE(imx_tve_modes); i++)
548 if (!strcasecmp(bm, imx_tve_modes[i]))
549 return i;
550
551 return -EINVAL;
552}
553
554static int imx_tve_bind(struct device *dev, struct device *master, void *data)
555{
556 struct platform_device *pdev = to_platform_device(dev);
557 struct drm_device *drm = data;
558 struct device_node *np = dev->of_node;
559 struct device_node *ddc_node;
560 struct imx_tve *tve;
561 struct resource *res;
562 void __iomem *base;
563 unsigned int val;
564 int irq;
565 int ret;
566
567 tve = devm_kzalloc(dev, sizeof(*tve), GFP_KERNEL);
568 if (!tve)
569 return -ENOMEM;
570
571 tve->dev = dev;
572 spin_lock_init(&tve->lock);
573
574 ddc_node = of_parse_phandle(np, "ddc-i2c-bus", 0);
575 if (ddc_node) {
576 tve->ddc = of_find_i2c_adapter_by_node(ddc_node);
577 of_node_put(ddc_node);
578 }
579
580 tve->mode = of_get_tve_mode(np);
581 if (tve->mode != TVE_MODE_VGA) {
582 dev_err(dev, "only VGA mode supported, currently\n");
583 return -EINVAL;
584 }
585
586 if (tve->mode == TVE_MODE_VGA) {
587 ret = of_property_read_u32(np, "fsl,hsync-pin",
588 &tve->hsync_pin);
589
590 if (ret < 0) {
591 dev_err(dev, "failed to get vsync pin\n");
592 return ret;
593 }
594
595 ret |= of_property_read_u32(np, "fsl,vsync-pin",
596 &tve->vsync_pin);
597
598 if (ret < 0) {
599 dev_err(dev, "failed to get vsync pin\n");
600 return ret;
601 }
602 }
603
604 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
605 base = devm_ioremap_resource(dev, res);
606 if (IS_ERR(base))
607 return PTR_ERR(base);
608
609 tve_regmap_config.lock_arg = tve;
610 tve->regmap = devm_regmap_init_mmio_clk(dev, "tve", base,
611 &tve_regmap_config);
612 if (IS_ERR(tve->regmap)) {
613 dev_err(dev, "failed to init regmap: %ld\n",
614 PTR_ERR(tve->regmap));
615 return PTR_ERR(tve->regmap);
616 }
617
618 irq = platform_get_irq(pdev, 0);
619 if (irq < 0) {
620 dev_err(dev, "failed to get irq\n");
621 return irq;
622 }
623
624 ret = devm_request_threaded_irq(dev, irq, NULL,
625 imx_tve_irq_handler, IRQF_ONESHOT,
626 "imx-tve", tve);
627 if (ret < 0) {
628 dev_err(dev, "failed to request irq: %d\n", ret);
629 return ret;
630 }
631
632 tve->dac_reg = devm_regulator_get(dev, "dac");
633 if (!IS_ERR(tve->dac_reg)) {
634 regulator_set_voltage(tve->dac_reg, 2750000, 2750000);
635 ret = regulator_enable(tve->dac_reg);
636 if (ret)
637 return ret;
638 }
639
640 tve->clk = devm_clk_get(dev, "tve");
641 if (IS_ERR(tve->clk)) {
642 dev_err(dev, "failed to get high speed tve clock: %ld\n",
643 PTR_ERR(tve->clk));
644 return PTR_ERR(tve->clk);
645 }
646
647 /* this is the IPU DI clock input selector, can be parented to tve_di */
648 tve->di_sel_clk = devm_clk_get(dev, "di_sel");
649 if (IS_ERR(tve->di_sel_clk)) {
650 dev_err(dev, "failed to get ipu di mux clock: %ld\n",
651 PTR_ERR(tve->di_sel_clk));
652 return PTR_ERR(tve->di_sel_clk);
653 }
654
655 ret = tve_clk_init(tve, base);
656 if (ret < 0)
657 return ret;
658
659 ret = regmap_read(tve->regmap, TVE_COM_CONF_REG, &val);
660 if (ret < 0) {
661 dev_err(dev, "failed to read configuration register: %d\n",
662 ret);
663 return ret;
664 }
665 if (val != 0x00100000) {
666 dev_err(dev, "configuration register default value indicates this is not a TVEv2\n");
667 return -ENODEV;
668 }
669
670 /* disable cable detection for VGA mode */
671 ret = regmap_write(tve->regmap, TVE_CD_CONT_REG, 0);
672 if (ret)
673 return ret;
674
675 ret = imx_tve_register(drm, tve);
676 if (ret)
677 return ret;
678
679 dev_set_drvdata(dev, tve);
680
681 return 0;
682}
683
684static void imx_tve_unbind(struct device *dev, struct device *master,
685 void *data)
686{
687 struct imx_tve *tve = dev_get_drvdata(dev);
688
689 tve->connector.funcs->destroy(&tve->connector);
690 tve->encoder.funcs->destroy(&tve->encoder);
691
692 if (!IS_ERR(tve->dac_reg))
693 regulator_disable(tve->dac_reg);
694}
695
696static const struct component_ops imx_tve_ops = {
697 .bind = imx_tve_bind,
698 .unbind = imx_tve_unbind,
699};
700
701static int imx_tve_probe(struct platform_device *pdev)
702{
703 return component_add(&pdev->dev, &imx_tve_ops);
704}
705
706static int imx_tve_remove(struct platform_device *pdev)
707{
708 component_del(&pdev->dev, &imx_tve_ops);
709 return 0;
710}
711
712static const struct of_device_id imx_tve_dt_ids[] = {
713 { .compatible = "fsl,imx53-tve", },
714 { /* sentinel */ }
715};
716MODULE_DEVICE_TABLE(of, imx_tve_dt_ids);
717
718static struct platform_driver imx_tve_driver = {
719 .probe = imx_tve_probe,
720 .remove = imx_tve_remove,
721 .driver = {
722 .of_match_table = imx_tve_dt_ids,
723 .name = "imx-tve",
724 },
725};
726
727module_platform_driver(imx_tve_driver);
728
729MODULE_DESCRIPTION("i.MX Television Encoder driver");
730MODULE_AUTHOR("Philipp Zabel, Pengutronix");
731MODULE_LICENSE("GPL");
732MODULE_ALIAS("platform:imx-tve");
1/*
2 * i.MX drm driver - Television Encoder (TVEv2)
3 *
4 * Copyright (C) 2013 Philipp Zabel, Pengutronix
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version 2
9 * of the License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 */
15
16#include <linux/clk.h>
17#include <linux/clk-provider.h>
18#include <linux/component.h>
19#include <linux/module.h>
20#include <linux/i2c.h>
21#include <linux/regmap.h>
22#include <linux/regulator/consumer.h>
23#include <linux/spinlock.h>
24#include <linux/videodev2.h>
25#include <drm/drmP.h>
26#include <drm/drm_atomic_helper.h>
27#include <drm/drm_fb_helper.h>
28#include <drm/drm_crtc_helper.h>
29#include <video/imx-ipu-v3.h>
30
31#include "imx-drm.h"
32
33#define TVE_COM_CONF_REG 0x00
34#define TVE_TVDAC0_CONT_REG 0x28
35#define TVE_TVDAC1_CONT_REG 0x2c
36#define TVE_TVDAC2_CONT_REG 0x30
37#define TVE_CD_CONT_REG 0x34
38#define TVE_INT_CONT_REG 0x64
39#define TVE_STAT_REG 0x68
40#define TVE_TST_MODE_REG 0x6c
41#define TVE_MV_CONT_REG 0xdc
42
43/* TVE_COM_CONF_REG */
44#define TVE_SYNC_CH_2_EN BIT(22)
45#define TVE_SYNC_CH_1_EN BIT(21)
46#define TVE_SYNC_CH_0_EN BIT(20)
47#define TVE_TV_OUT_MODE_MASK (0x7 << 12)
48#define TVE_TV_OUT_DISABLE (0x0 << 12)
49#define TVE_TV_OUT_CVBS_0 (0x1 << 12)
50#define TVE_TV_OUT_CVBS_2 (0x2 << 12)
51#define TVE_TV_OUT_CVBS_0_2 (0x3 << 12)
52#define TVE_TV_OUT_SVIDEO_0_1 (0x4 << 12)
53#define TVE_TV_OUT_SVIDEO_0_1_CVBS2_2 (0x5 << 12)
54#define TVE_TV_OUT_YPBPR (0x6 << 12)
55#define TVE_TV_OUT_RGB (0x7 << 12)
56#define TVE_TV_STAND_MASK (0xf << 8)
57#define TVE_TV_STAND_HD_1080P30 (0xc << 8)
58#define TVE_P2I_CONV_EN BIT(7)
59#define TVE_INP_VIDEO_FORM BIT(6)
60#define TVE_INP_YCBCR_422 (0x0 << 6)
61#define TVE_INP_YCBCR_444 (0x1 << 6)
62#define TVE_DATA_SOURCE_MASK (0x3 << 4)
63#define TVE_DATA_SOURCE_BUS1 (0x0 << 4)
64#define TVE_DATA_SOURCE_BUS2 (0x1 << 4)
65#define TVE_DATA_SOURCE_EXT (0x2 << 4)
66#define TVE_DATA_SOURCE_TESTGEN (0x3 << 4)
67#define TVE_IPU_CLK_EN_OFS 3
68#define TVE_IPU_CLK_EN BIT(3)
69#define TVE_DAC_SAMP_RATE_OFS 1
70#define TVE_DAC_SAMP_RATE_WIDTH 2
71#define TVE_DAC_SAMP_RATE_MASK (0x3 << 1)
72#define TVE_DAC_FULL_RATE (0x0 << 1)
73#define TVE_DAC_DIV2_RATE (0x1 << 1)
74#define TVE_DAC_DIV4_RATE (0x2 << 1)
75#define TVE_EN BIT(0)
76
77/* TVE_TVDACx_CONT_REG */
78#define TVE_TVDAC_GAIN_MASK (0x3f << 0)
79
80/* TVE_CD_CONT_REG */
81#define TVE_CD_CH_2_SM_EN BIT(22)
82#define TVE_CD_CH_1_SM_EN BIT(21)
83#define TVE_CD_CH_0_SM_EN BIT(20)
84#define TVE_CD_CH_2_LM_EN BIT(18)
85#define TVE_CD_CH_1_LM_EN BIT(17)
86#define TVE_CD_CH_0_LM_EN BIT(16)
87#define TVE_CD_CH_2_REF_LVL BIT(10)
88#define TVE_CD_CH_1_REF_LVL BIT(9)
89#define TVE_CD_CH_0_REF_LVL BIT(8)
90#define TVE_CD_EN BIT(0)
91
92/* TVE_INT_CONT_REG */
93#define TVE_FRAME_END_IEN BIT(13)
94#define TVE_CD_MON_END_IEN BIT(2)
95#define TVE_CD_SM_IEN BIT(1)
96#define TVE_CD_LM_IEN BIT(0)
97
98/* TVE_TST_MODE_REG */
99#define TVE_TVDAC_TEST_MODE_MASK (0x7 << 0)
100
101#define IMX_TVE_DAC_VOLTAGE 2750000
102
103enum {
104 TVE_MODE_TVOUT,
105 TVE_MODE_VGA,
106};
107
108struct imx_tve {
109 struct drm_connector connector;
110 struct drm_encoder encoder;
111 struct device *dev;
112 spinlock_t lock; /* register lock */
113 bool enabled;
114 int mode;
115 int di_hsync_pin;
116 int di_vsync_pin;
117
118 struct regmap *regmap;
119 struct regulator *dac_reg;
120 struct i2c_adapter *ddc;
121 struct clk *clk;
122 struct clk *di_sel_clk;
123 struct clk_hw clk_hw_di;
124 struct clk *di_clk;
125};
126
127static inline struct imx_tve *con_to_tve(struct drm_connector *c)
128{
129 return container_of(c, struct imx_tve, connector);
130}
131
132static inline struct imx_tve *enc_to_tve(struct drm_encoder *e)
133{
134 return container_of(e, struct imx_tve, encoder);
135}
136
137static void tve_lock(void *__tve)
138__acquires(&tve->lock)
139{
140 struct imx_tve *tve = __tve;
141
142 spin_lock(&tve->lock);
143}
144
145static void tve_unlock(void *__tve)
146__releases(&tve->lock)
147{
148 struct imx_tve *tve = __tve;
149
150 spin_unlock(&tve->lock);
151}
152
153static void tve_enable(struct imx_tve *tve)
154{
155 if (!tve->enabled) {
156 tve->enabled = true;
157 clk_prepare_enable(tve->clk);
158 regmap_update_bits(tve->regmap, TVE_COM_CONF_REG,
159 TVE_EN, TVE_EN);
160 }
161
162 /* clear interrupt status register */
163 regmap_write(tve->regmap, TVE_STAT_REG, 0xffffffff);
164
165 /* cable detection irq disabled in VGA mode, enabled in TVOUT mode */
166 if (tve->mode == TVE_MODE_VGA)
167 regmap_write(tve->regmap, TVE_INT_CONT_REG, 0);
168 else
169 regmap_write(tve->regmap, TVE_INT_CONT_REG,
170 TVE_CD_SM_IEN |
171 TVE_CD_LM_IEN |
172 TVE_CD_MON_END_IEN);
173}
174
175static void tve_disable(struct imx_tve *tve)
176{
177 if (tve->enabled) {
178 tve->enabled = false;
179 regmap_update_bits(tve->regmap, TVE_COM_CONF_REG, TVE_EN, 0);
180 clk_disable_unprepare(tve->clk);
181 }
182}
183
184static int tve_setup_tvout(struct imx_tve *tve)
185{
186 return -ENOTSUPP;
187}
188
189static int tve_setup_vga(struct imx_tve *tve)
190{
191 unsigned int mask;
192 unsigned int val;
193 int ret;
194
195 /* set gain to (1 + 10/128) to provide 0.7V peak-to-peak amplitude */
196 ret = regmap_update_bits(tve->regmap, TVE_TVDAC0_CONT_REG,
197 TVE_TVDAC_GAIN_MASK, 0x0a);
198 if (ret)
199 return ret;
200
201 ret = regmap_update_bits(tve->regmap, TVE_TVDAC1_CONT_REG,
202 TVE_TVDAC_GAIN_MASK, 0x0a);
203 if (ret)
204 return ret;
205
206 ret = regmap_update_bits(tve->regmap, TVE_TVDAC2_CONT_REG,
207 TVE_TVDAC_GAIN_MASK, 0x0a);
208 if (ret)
209 return ret;
210
211 /* set configuration register */
212 mask = TVE_DATA_SOURCE_MASK | TVE_INP_VIDEO_FORM;
213 val = TVE_DATA_SOURCE_BUS2 | TVE_INP_YCBCR_444;
214 mask |= TVE_TV_STAND_MASK | TVE_P2I_CONV_EN;
215 val |= TVE_TV_STAND_HD_1080P30 | 0;
216 mask |= TVE_TV_OUT_MODE_MASK | TVE_SYNC_CH_0_EN;
217 val |= TVE_TV_OUT_RGB | TVE_SYNC_CH_0_EN;
218 ret = regmap_update_bits(tve->regmap, TVE_COM_CONF_REG, mask, val);
219 if (ret)
220 return ret;
221
222 /* set test mode (as documented) */
223 return regmap_update_bits(tve->regmap, TVE_TST_MODE_REG,
224 TVE_TVDAC_TEST_MODE_MASK, 1);
225}
226
227static int imx_tve_connector_get_modes(struct drm_connector *connector)
228{
229 struct imx_tve *tve = con_to_tve(connector);
230 struct edid *edid;
231 int ret = 0;
232
233 if (!tve->ddc)
234 return 0;
235
236 edid = drm_get_edid(connector, tve->ddc);
237 if (edid) {
238 drm_mode_connector_update_edid_property(connector, edid);
239 ret = drm_add_edid_modes(connector, edid);
240 kfree(edid);
241 }
242
243 return ret;
244}
245
246static int imx_tve_connector_mode_valid(struct drm_connector *connector,
247 struct drm_display_mode *mode)
248{
249 struct imx_tve *tve = con_to_tve(connector);
250 unsigned long rate;
251
252 /* pixel clock with 2x oversampling */
253 rate = clk_round_rate(tve->clk, 2000UL * mode->clock) / 2000;
254 if (rate == mode->clock)
255 return MODE_OK;
256
257 /* pixel clock without oversampling */
258 rate = clk_round_rate(tve->clk, 1000UL * mode->clock) / 1000;
259 if (rate == mode->clock)
260 return MODE_OK;
261
262 dev_warn(tve->dev, "ignoring mode %dx%d\n",
263 mode->hdisplay, mode->vdisplay);
264
265 return MODE_BAD;
266}
267
268static struct drm_encoder *imx_tve_connector_best_encoder(
269 struct drm_connector *connector)
270{
271 struct imx_tve *tve = con_to_tve(connector);
272
273 return &tve->encoder;
274}
275
276static void imx_tve_encoder_mode_set(struct drm_encoder *encoder,
277 struct drm_display_mode *orig_mode,
278 struct drm_display_mode *mode)
279{
280 struct imx_tve *tve = enc_to_tve(encoder);
281 unsigned long rounded_rate;
282 unsigned long rate;
283 int div = 1;
284 int ret;
285
286 /*
287 * FIXME
288 * we should try 4k * mode->clock first,
289 * and enable 4x oversampling for lower resolutions
290 */
291 rate = 2000UL * mode->clock;
292 clk_set_rate(tve->clk, rate);
293 rounded_rate = clk_get_rate(tve->clk);
294 if (rounded_rate >= rate)
295 div = 2;
296 clk_set_rate(tve->di_clk, rounded_rate / div);
297
298 ret = clk_set_parent(tve->di_sel_clk, tve->di_clk);
299 if (ret < 0) {
300 dev_err(tve->dev, "failed to set di_sel parent to tve_di: %d\n",
301 ret);
302 }
303
304 regmap_update_bits(tve->regmap, TVE_COM_CONF_REG,
305 TVE_IPU_CLK_EN, TVE_IPU_CLK_EN);
306
307 if (tve->mode == TVE_MODE_VGA)
308 ret = tve_setup_vga(tve);
309 else
310 ret = tve_setup_tvout(tve);
311 if (ret)
312 dev_err(tve->dev, "failed to set configuration: %d\n", ret);
313}
314
315static void imx_tve_encoder_enable(struct drm_encoder *encoder)
316{
317 struct imx_tve *tve = enc_to_tve(encoder);
318
319 tve_enable(tve);
320}
321
322static void imx_tve_encoder_disable(struct drm_encoder *encoder)
323{
324 struct imx_tve *tve = enc_to_tve(encoder);
325
326 tve_disable(tve);
327}
328
329static int imx_tve_atomic_check(struct drm_encoder *encoder,
330 struct drm_crtc_state *crtc_state,
331 struct drm_connector_state *conn_state)
332{
333 struct imx_crtc_state *imx_crtc_state = to_imx_crtc_state(crtc_state);
334 struct imx_tve *tve = enc_to_tve(encoder);
335
336 imx_crtc_state->bus_format = MEDIA_BUS_FMT_GBR888_1X24;
337 imx_crtc_state->di_hsync_pin = tve->di_hsync_pin;
338 imx_crtc_state->di_vsync_pin = tve->di_vsync_pin;
339
340 return 0;
341}
342
343static const struct drm_connector_funcs imx_tve_connector_funcs = {
344 .fill_modes = drm_helper_probe_single_connector_modes,
345 .destroy = imx_drm_connector_destroy,
346 .reset = drm_atomic_helper_connector_reset,
347 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
348 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
349};
350
351static const struct drm_connector_helper_funcs imx_tve_connector_helper_funcs = {
352 .get_modes = imx_tve_connector_get_modes,
353 .best_encoder = imx_tve_connector_best_encoder,
354 .mode_valid = imx_tve_connector_mode_valid,
355};
356
357static const struct drm_encoder_funcs imx_tve_encoder_funcs = {
358 .destroy = imx_drm_encoder_destroy,
359};
360
361static const struct drm_encoder_helper_funcs imx_tve_encoder_helper_funcs = {
362 .mode_set = imx_tve_encoder_mode_set,
363 .enable = imx_tve_encoder_enable,
364 .disable = imx_tve_encoder_disable,
365 .atomic_check = imx_tve_atomic_check,
366};
367
368static irqreturn_t imx_tve_irq_handler(int irq, void *data)
369{
370 struct imx_tve *tve = data;
371 unsigned int val;
372
373 regmap_read(tve->regmap, TVE_STAT_REG, &val);
374
375 /* clear interrupt status register */
376 regmap_write(tve->regmap, TVE_STAT_REG, 0xffffffff);
377
378 return IRQ_HANDLED;
379}
380
381static unsigned long clk_tve_di_recalc_rate(struct clk_hw *hw,
382 unsigned long parent_rate)
383{
384 struct imx_tve *tve = container_of(hw, struct imx_tve, clk_hw_di);
385 unsigned int val;
386 int ret;
387
388 ret = regmap_read(tve->regmap, TVE_COM_CONF_REG, &val);
389 if (ret < 0)
390 return 0;
391
392 switch (val & TVE_DAC_SAMP_RATE_MASK) {
393 case TVE_DAC_DIV4_RATE:
394 return parent_rate / 4;
395 case TVE_DAC_DIV2_RATE:
396 return parent_rate / 2;
397 case TVE_DAC_FULL_RATE:
398 default:
399 return parent_rate;
400 }
401
402 return 0;
403}
404
405static long clk_tve_di_round_rate(struct clk_hw *hw, unsigned long rate,
406 unsigned long *prate)
407{
408 unsigned long div;
409
410 div = *prate / rate;
411 if (div >= 4)
412 return *prate / 4;
413 else if (div >= 2)
414 return *prate / 2;
415 return *prate;
416}
417
418static int clk_tve_di_set_rate(struct clk_hw *hw, unsigned long rate,
419 unsigned long parent_rate)
420{
421 struct imx_tve *tve = container_of(hw, struct imx_tve, clk_hw_di);
422 unsigned long div;
423 u32 val;
424 int ret;
425
426 div = parent_rate / rate;
427 if (div >= 4)
428 val = TVE_DAC_DIV4_RATE;
429 else if (div >= 2)
430 val = TVE_DAC_DIV2_RATE;
431 else
432 val = TVE_DAC_FULL_RATE;
433
434 ret = regmap_update_bits(tve->regmap, TVE_COM_CONF_REG,
435 TVE_DAC_SAMP_RATE_MASK, val);
436
437 if (ret < 0) {
438 dev_err(tve->dev, "failed to set divider: %d\n", ret);
439 return ret;
440 }
441
442 return 0;
443}
444
445static struct clk_ops clk_tve_di_ops = {
446 .round_rate = clk_tve_di_round_rate,
447 .set_rate = clk_tve_di_set_rate,
448 .recalc_rate = clk_tve_di_recalc_rate,
449};
450
451static int tve_clk_init(struct imx_tve *tve, void __iomem *base)
452{
453 const char *tve_di_parent[1];
454 struct clk_init_data init = {
455 .name = "tve_di",
456 .ops = &clk_tve_di_ops,
457 .num_parents = 1,
458 .flags = 0,
459 };
460
461 tve_di_parent[0] = __clk_get_name(tve->clk);
462 init.parent_names = (const char **)&tve_di_parent;
463
464 tve->clk_hw_di.init = &init;
465 tve->di_clk = clk_register(tve->dev, &tve->clk_hw_di);
466 if (IS_ERR(tve->di_clk)) {
467 dev_err(tve->dev, "failed to register TVE output clock: %ld\n",
468 PTR_ERR(tve->di_clk));
469 return PTR_ERR(tve->di_clk);
470 }
471
472 return 0;
473}
474
475static int imx_tve_register(struct drm_device *drm, struct imx_tve *tve)
476{
477 int encoder_type;
478 int ret;
479
480 encoder_type = tve->mode == TVE_MODE_VGA ?
481 DRM_MODE_ENCODER_DAC : DRM_MODE_ENCODER_TVDAC;
482
483 ret = imx_drm_encoder_parse_of(drm, &tve->encoder, tve->dev->of_node);
484 if (ret)
485 return ret;
486
487 drm_encoder_helper_add(&tve->encoder, &imx_tve_encoder_helper_funcs);
488 drm_encoder_init(drm, &tve->encoder, &imx_tve_encoder_funcs,
489 encoder_type, NULL);
490
491 drm_connector_helper_add(&tve->connector,
492 &imx_tve_connector_helper_funcs);
493 drm_connector_init(drm, &tve->connector, &imx_tve_connector_funcs,
494 DRM_MODE_CONNECTOR_VGA);
495
496 drm_mode_connector_attach_encoder(&tve->connector, &tve->encoder);
497
498 return 0;
499}
500
501static bool imx_tve_readable_reg(struct device *dev, unsigned int reg)
502{
503 return (reg % 4 == 0) && (reg <= 0xdc);
504}
505
506static struct regmap_config tve_regmap_config = {
507 .reg_bits = 32,
508 .val_bits = 32,
509 .reg_stride = 4,
510
511 .readable_reg = imx_tve_readable_reg,
512
513 .lock = tve_lock,
514 .unlock = tve_unlock,
515
516 .max_register = 0xdc,
517};
518
519static const char * const imx_tve_modes[] = {
520 [TVE_MODE_TVOUT] = "tvout",
521 [TVE_MODE_VGA] = "vga",
522};
523
524static const int of_get_tve_mode(struct device_node *np)
525{
526 const char *bm;
527 int ret, i;
528
529 ret = of_property_read_string(np, "fsl,tve-mode", &bm);
530 if (ret < 0)
531 return ret;
532
533 for (i = 0; i < ARRAY_SIZE(imx_tve_modes); i++)
534 if (!strcasecmp(bm, imx_tve_modes[i]))
535 return i;
536
537 return -EINVAL;
538}
539
540static int imx_tve_bind(struct device *dev, struct device *master, void *data)
541{
542 struct platform_device *pdev = to_platform_device(dev);
543 struct drm_device *drm = data;
544 struct device_node *np = dev->of_node;
545 struct device_node *ddc_node;
546 struct imx_tve *tve;
547 struct resource *res;
548 void __iomem *base;
549 unsigned int val;
550 int irq;
551 int ret;
552
553 tve = devm_kzalloc(dev, sizeof(*tve), GFP_KERNEL);
554 if (!tve)
555 return -ENOMEM;
556
557 tve->dev = dev;
558 spin_lock_init(&tve->lock);
559
560 ddc_node = of_parse_phandle(np, "ddc-i2c-bus", 0);
561 if (ddc_node) {
562 tve->ddc = of_find_i2c_adapter_by_node(ddc_node);
563 of_node_put(ddc_node);
564 }
565
566 tve->mode = of_get_tve_mode(np);
567 if (tve->mode != TVE_MODE_VGA) {
568 dev_err(dev, "only VGA mode supported, currently\n");
569 return -EINVAL;
570 }
571
572 if (tve->mode == TVE_MODE_VGA) {
573 ret = of_property_read_u32(np, "fsl,hsync-pin",
574 &tve->di_hsync_pin);
575
576 if (ret < 0) {
577 dev_err(dev, "failed to get hsync pin\n");
578 return ret;
579 }
580
581 ret = of_property_read_u32(np, "fsl,vsync-pin",
582 &tve->di_vsync_pin);
583
584 if (ret < 0) {
585 dev_err(dev, "failed to get vsync pin\n");
586 return ret;
587 }
588 }
589
590 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
591 base = devm_ioremap_resource(dev, res);
592 if (IS_ERR(base))
593 return PTR_ERR(base);
594
595 tve_regmap_config.lock_arg = tve;
596 tve->regmap = devm_regmap_init_mmio_clk(dev, "tve", base,
597 &tve_regmap_config);
598 if (IS_ERR(tve->regmap)) {
599 dev_err(dev, "failed to init regmap: %ld\n",
600 PTR_ERR(tve->regmap));
601 return PTR_ERR(tve->regmap);
602 }
603
604 irq = platform_get_irq(pdev, 0);
605 if (irq < 0) {
606 dev_err(dev, "failed to get irq\n");
607 return irq;
608 }
609
610 ret = devm_request_threaded_irq(dev, irq, NULL,
611 imx_tve_irq_handler, IRQF_ONESHOT,
612 "imx-tve", tve);
613 if (ret < 0) {
614 dev_err(dev, "failed to request irq: %d\n", ret);
615 return ret;
616 }
617
618 tve->dac_reg = devm_regulator_get(dev, "dac");
619 if (!IS_ERR(tve->dac_reg)) {
620 if (regulator_get_voltage(tve->dac_reg) != IMX_TVE_DAC_VOLTAGE)
621 dev_warn(dev, "dac voltage is not %d uV\n", IMX_TVE_DAC_VOLTAGE);
622 ret = regulator_enable(tve->dac_reg);
623 if (ret)
624 return ret;
625 }
626
627 tve->clk = devm_clk_get(dev, "tve");
628 if (IS_ERR(tve->clk)) {
629 dev_err(dev, "failed to get high speed tve clock: %ld\n",
630 PTR_ERR(tve->clk));
631 return PTR_ERR(tve->clk);
632 }
633
634 /* this is the IPU DI clock input selector, can be parented to tve_di */
635 tve->di_sel_clk = devm_clk_get(dev, "di_sel");
636 if (IS_ERR(tve->di_sel_clk)) {
637 dev_err(dev, "failed to get ipu di mux clock: %ld\n",
638 PTR_ERR(tve->di_sel_clk));
639 return PTR_ERR(tve->di_sel_clk);
640 }
641
642 ret = tve_clk_init(tve, base);
643 if (ret < 0)
644 return ret;
645
646 ret = regmap_read(tve->regmap, TVE_COM_CONF_REG, &val);
647 if (ret < 0) {
648 dev_err(dev, "failed to read configuration register: %d\n",
649 ret);
650 return ret;
651 }
652 if (val != 0x00100000) {
653 dev_err(dev, "configuration register default value indicates this is not a TVEv2\n");
654 return -ENODEV;
655 }
656
657 /* disable cable detection for VGA mode */
658 ret = regmap_write(tve->regmap, TVE_CD_CONT_REG, 0);
659 if (ret)
660 return ret;
661
662 ret = imx_tve_register(drm, tve);
663 if (ret)
664 return ret;
665
666 dev_set_drvdata(dev, tve);
667
668 return 0;
669}
670
671static void imx_tve_unbind(struct device *dev, struct device *master,
672 void *data)
673{
674 struct imx_tve *tve = dev_get_drvdata(dev);
675
676 if (!IS_ERR(tve->dac_reg))
677 regulator_disable(tve->dac_reg);
678}
679
680static const struct component_ops imx_tve_ops = {
681 .bind = imx_tve_bind,
682 .unbind = imx_tve_unbind,
683};
684
685static int imx_tve_probe(struct platform_device *pdev)
686{
687 return component_add(&pdev->dev, &imx_tve_ops);
688}
689
690static int imx_tve_remove(struct platform_device *pdev)
691{
692 component_del(&pdev->dev, &imx_tve_ops);
693 return 0;
694}
695
696static const struct of_device_id imx_tve_dt_ids[] = {
697 { .compatible = "fsl,imx53-tve", },
698 { /* sentinel */ }
699};
700MODULE_DEVICE_TABLE(of, imx_tve_dt_ids);
701
702static struct platform_driver imx_tve_driver = {
703 .probe = imx_tve_probe,
704 .remove = imx_tve_remove,
705 .driver = {
706 .of_match_table = imx_tve_dt_ids,
707 .name = "imx-tve",
708 },
709};
710
711module_platform_driver(imx_tve_driver);
712
713MODULE_DESCRIPTION("i.MX Television Encoder driver");
714MODULE_AUTHOR("Philipp Zabel, Pengutronix");
715MODULE_LICENSE("GPL");
716MODULE_ALIAS("platform:imx-tve");