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1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * i.MX drm driver - Television Encoder (TVEv2)
4 *
5 * Copyright (C) 2013 Philipp Zabel, Pengutronix
6 */
7
8#include <linux/clk-provider.h>
9#include <linux/clk.h>
10#include <linux/component.h>
11#include <linux/i2c.h>
12#include <linux/module.h>
13#include <linux/platform_device.h>
14#include <linux/regmap.h>
15#include <linux/regulator/consumer.h>
16#include <linux/spinlock.h>
17#include <linux/videodev2.h>
18
19#include <video/imx-ipu-v3.h>
20
21#include <drm/drm_atomic_helper.h>
22#include <drm/drm_fb_helper.h>
23#include <drm/drm_probe_helper.h>
24#include <drm/drm_simple_kms_helper.h>
25
26#include "imx-drm.h"
27
28#define TVE_COM_CONF_REG 0x00
29#define TVE_TVDAC0_CONT_REG 0x28
30#define TVE_TVDAC1_CONT_REG 0x2c
31#define TVE_TVDAC2_CONT_REG 0x30
32#define TVE_CD_CONT_REG 0x34
33#define TVE_INT_CONT_REG 0x64
34#define TVE_STAT_REG 0x68
35#define TVE_TST_MODE_REG 0x6c
36#define TVE_MV_CONT_REG 0xdc
37
38/* TVE_COM_CONF_REG */
39#define TVE_SYNC_CH_2_EN BIT(22)
40#define TVE_SYNC_CH_1_EN BIT(21)
41#define TVE_SYNC_CH_0_EN BIT(20)
42#define TVE_TV_OUT_MODE_MASK (0x7 << 12)
43#define TVE_TV_OUT_DISABLE (0x0 << 12)
44#define TVE_TV_OUT_CVBS_0 (0x1 << 12)
45#define TVE_TV_OUT_CVBS_2 (0x2 << 12)
46#define TVE_TV_OUT_CVBS_0_2 (0x3 << 12)
47#define TVE_TV_OUT_SVIDEO_0_1 (0x4 << 12)
48#define TVE_TV_OUT_SVIDEO_0_1_CVBS2_2 (0x5 << 12)
49#define TVE_TV_OUT_YPBPR (0x6 << 12)
50#define TVE_TV_OUT_RGB (0x7 << 12)
51#define TVE_TV_STAND_MASK (0xf << 8)
52#define TVE_TV_STAND_HD_1080P30 (0xc << 8)
53#define TVE_P2I_CONV_EN BIT(7)
54#define TVE_INP_VIDEO_FORM BIT(6)
55#define TVE_INP_YCBCR_422 (0x0 << 6)
56#define TVE_INP_YCBCR_444 (0x1 << 6)
57#define TVE_DATA_SOURCE_MASK (0x3 << 4)
58#define TVE_DATA_SOURCE_BUS1 (0x0 << 4)
59#define TVE_DATA_SOURCE_BUS2 (0x1 << 4)
60#define TVE_DATA_SOURCE_EXT (0x2 << 4)
61#define TVE_DATA_SOURCE_TESTGEN (0x3 << 4)
62#define TVE_IPU_CLK_EN_OFS 3
63#define TVE_IPU_CLK_EN BIT(3)
64#define TVE_DAC_SAMP_RATE_OFS 1
65#define TVE_DAC_SAMP_RATE_WIDTH 2
66#define TVE_DAC_SAMP_RATE_MASK (0x3 << 1)
67#define TVE_DAC_FULL_RATE (0x0 << 1)
68#define TVE_DAC_DIV2_RATE (0x1 << 1)
69#define TVE_DAC_DIV4_RATE (0x2 << 1)
70#define TVE_EN BIT(0)
71
72/* TVE_TVDACx_CONT_REG */
73#define TVE_TVDAC_GAIN_MASK (0x3f << 0)
74
75/* TVE_CD_CONT_REG */
76#define TVE_CD_CH_2_SM_EN BIT(22)
77#define TVE_CD_CH_1_SM_EN BIT(21)
78#define TVE_CD_CH_0_SM_EN BIT(20)
79#define TVE_CD_CH_2_LM_EN BIT(18)
80#define TVE_CD_CH_1_LM_EN BIT(17)
81#define TVE_CD_CH_0_LM_EN BIT(16)
82#define TVE_CD_CH_2_REF_LVL BIT(10)
83#define TVE_CD_CH_1_REF_LVL BIT(9)
84#define TVE_CD_CH_0_REF_LVL BIT(8)
85#define TVE_CD_EN BIT(0)
86
87/* TVE_INT_CONT_REG */
88#define TVE_FRAME_END_IEN BIT(13)
89#define TVE_CD_MON_END_IEN BIT(2)
90#define TVE_CD_SM_IEN BIT(1)
91#define TVE_CD_LM_IEN BIT(0)
92
93/* TVE_TST_MODE_REG */
94#define TVE_TVDAC_TEST_MODE_MASK (0x7 << 0)
95
96#define IMX_TVE_DAC_VOLTAGE 2750000
97
98enum {
99 TVE_MODE_TVOUT,
100 TVE_MODE_VGA,
101};
102
103struct imx_tve {
104 struct drm_connector connector;
105 struct drm_encoder encoder;
106 struct device *dev;
107 spinlock_t lock; /* register lock */
108 bool enabled;
109 int mode;
110 int di_hsync_pin;
111 int di_vsync_pin;
112
113 struct regmap *regmap;
114 struct regulator *dac_reg;
115 struct i2c_adapter *ddc;
116 struct clk *clk;
117 struct clk *di_sel_clk;
118 struct clk_hw clk_hw_di;
119 struct clk *di_clk;
120};
121
122static inline struct imx_tve *con_to_tve(struct drm_connector *c)
123{
124 return container_of(c, struct imx_tve, connector);
125}
126
127static inline struct imx_tve *enc_to_tve(struct drm_encoder *e)
128{
129 return container_of(e, struct imx_tve, encoder);
130}
131
132static void tve_lock(void *__tve)
133__acquires(&tve->lock)
134{
135 struct imx_tve *tve = __tve;
136
137 spin_lock(&tve->lock);
138}
139
140static void tve_unlock(void *__tve)
141__releases(&tve->lock)
142{
143 struct imx_tve *tve = __tve;
144
145 spin_unlock(&tve->lock);
146}
147
148static void tve_enable(struct imx_tve *tve)
149{
150 if (!tve->enabled) {
151 tve->enabled = true;
152 clk_prepare_enable(tve->clk);
153 regmap_update_bits(tve->regmap, TVE_COM_CONF_REG,
154 TVE_EN, TVE_EN);
155 }
156
157 /* clear interrupt status register */
158 regmap_write(tve->regmap, TVE_STAT_REG, 0xffffffff);
159
160 /* cable detection irq disabled in VGA mode, enabled in TVOUT mode */
161 if (tve->mode == TVE_MODE_VGA)
162 regmap_write(tve->regmap, TVE_INT_CONT_REG, 0);
163 else
164 regmap_write(tve->regmap, TVE_INT_CONT_REG,
165 TVE_CD_SM_IEN |
166 TVE_CD_LM_IEN |
167 TVE_CD_MON_END_IEN);
168}
169
170static void tve_disable(struct imx_tve *tve)
171{
172 if (tve->enabled) {
173 tve->enabled = false;
174 regmap_update_bits(tve->regmap, TVE_COM_CONF_REG, TVE_EN, 0);
175 clk_disable_unprepare(tve->clk);
176 }
177}
178
179static int tve_setup_tvout(struct imx_tve *tve)
180{
181 return -ENOTSUPP;
182}
183
184static int tve_setup_vga(struct imx_tve *tve)
185{
186 unsigned int mask;
187 unsigned int val;
188 int ret;
189
190 /* set gain to (1 + 10/128) to provide 0.7V peak-to-peak amplitude */
191 ret = regmap_update_bits(tve->regmap, TVE_TVDAC0_CONT_REG,
192 TVE_TVDAC_GAIN_MASK, 0x0a);
193 if (ret)
194 return ret;
195
196 ret = regmap_update_bits(tve->regmap, TVE_TVDAC1_CONT_REG,
197 TVE_TVDAC_GAIN_MASK, 0x0a);
198 if (ret)
199 return ret;
200
201 ret = regmap_update_bits(tve->regmap, TVE_TVDAC2_CONT_REG,
202 TVE_TVDAC_GAIN_MASK, 0x0a);
203 if (ret)
204 return ret;
205
206 /* set configuration register */
207 mask = TVE_DATA_SOURCE_MASK | TVE_INP_VIDEO_FORM;
208 val = TVE_DATA_SOURCE_BUS2 | TVE_INP_YCBCR_444;
209 mask |= TVE_TV_STAND_MASK | TVE_P2I_CONV_EN;
210 val |= TVE_TV_STAND_HD_1080P30 | 0;
211 mask |= TVE_TV_OUT_MODE_MASK | TVE_SYNC_CH_0_EN;
212 val |= TVE_TV_OUT_RGB | TVE_SYNC_CH_0_EN;
213 ret = regmap_update_bits(tve->regmap, TVE_COM_CONF_REG, mask, val);
214 if (ret)
215 return ret;
216
217 /* set test mode (as documented) */
218 return regmap_update_bits(tve->regmap, TVE_TST_MODE_REG,
219 TVE_TVDAC_TEST_MODE_MASK, 1);
220}
221
222static int imx_tve_connector_get_modes(struct drm_connector *connector)
223{
224 struct imx_tve *tve = con_to_tve(connector);
225 struct edid *edid;
226 int ret = 0;
227
228 if (!tve->ddc)
229 return 0;
230
231 edid = drm_get_edid(connector, tve->ddc);
232 if (edid) {
233 drm_connector_update_edid_property(connector, edid);
234 ret = drm_add_edid_modes(connector, edid);
235 kfree(edid);
236 }
237
238 return ret;
239}
240
241static int imx_tve_connector_mode_valid(struct drm_connector *connector,
242 struct drm_display_mode *mode)
243{
244 struct imx_tve *tve = con_to_tve(connector);
245 unsigned long rate;
246
247 /* pixel clock with 2x oversampling */
248 rate = clk_round_rate(tve->clk, 2000UL * mode->clock) / 2000;
249 if (rate == mode->clock)
250 return MODE_OK;
251
252 /* pixel clock without oversampling */
253 rate = clk_round_rate(tve->clk, 1000UL * mode->clock) / 1000;
254 if (rate == mode->clock)
255 return MODE_OK;
256
257 dev_warn(tve->dev, "ignoring mode %dx%d\n",
258 mode->hdisplay, mode->vdisplay);
259
260 return MODE_BAD;
261}
262
263static void imx_tve_encoder_mode_set(struct drm_encoder *encoder,
264 struct drm_display_mode *orig_mode,
265 struct drm_display_mode *mode)
266{
267 struct imx_tve *tve = enc_to_tve(encoder);
268 unsigned long rounded_rate;
269 unsigned long rate;
270 int div = 1;
271 int ret;
272
273 /*
274 * FIXME
275 * we should try 4k * mode->clock first,
276 * and enable 4x oversampling for lower resolutions
277 */
278 rate = 2000UL * mode->clock;
279 clk_set_rate(tve->clk, rate);
280 rounded_rate = clk_get_rate(tve->clk);
281 if (rounded_rate >= rate)
282 div = 2;
283 clk_set_rate(tve->di_clk, rounded_rate / div);
284
285 ret = clk_set_parent(tve->di_sel_clk, tve->di_clk);
286 if (ret < 0) {
287 dev_err(tve->dev, "failed to set di_sel parent to tve_di: %d\n",
288 ret);
289 }
290
291 regmap_update_bits(tve->regmap, TVE_COM_CONF_REG,
292 TVE_IPU_CLK_EN, TVE_IPU_CLK_EN);
293
294 if (tve->mode == TVE_MODE_VGA)
295 ret = tve_setup_vga(tve);
296 else
297 ret = tve_setup_tvout(tve);
298 if (ret)
299 dev_err(tve->dev, "failed to set configuration: %d\n", ret);
300}
301
302static void imx_tve_encoder_enable(struct drm_encoder *encoder)
303{
304 struct imx_tve *tve = enc_to_tve(encoder);
305
306 tve_enable(tve);
307}
308
309static void imx_tve_encoder_disable(struct drm_encoder *encoder)
310{
311 struct imx_tve *tve = enc_to_tve(encoder);
312
313 tve_disable(tve);
314}
315
316static int imx_tve_atomic_check(struct drm_encoder *encoder,
317 struct drm_crtc_state *crtc_state,
318 struct drm_connector_state *conn_state)
319{
320 struct imx_crtc_state *imx_crtc_state = to_imx_crtc_state(crtc_state);
321 struct imx_tve *tve = enc_to_tve(encoder);
322
323 imx_crtc_state->bus_format = MEDIA_BUS_FMT_GBR888_1X24;
324 imx_crtc_state->di_hsync_pin = tve->di_hsync_pin;
325 imx_crtc_state->di_vsync_pin = tve->di_vsync_pin;
326
327 return 0;
328}
329
330static const struct drm_connector_funcs imx_tve_connector_funcs = {
331 .fill_modes = drm_helper_probe_single_connector_modes,
332 .destroy = imx_drm_connector_destroy,
333 .reset = drm_atomic_helper_connector_reset,
334 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
335 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
336};
337
338static const struct drm_connector_helper_funcs imx_tve_connector_helper_funcs = {
339 .get_modes = imx_tve_connector_get_modes,
340 .mode_valid = imx_tve_connector_mode_valid,
341};
342
343static const struct drm_encoder_helper_funcs imx_tve_encoder_helper_funcs = {
344 .mode_set = imx_tve_encoder_mode_set,
345 .enable = imx_tve_encoder_enable,
346 .disable = imx_tve_encoder_disable,
347 .atomic_check = imx_tve_atomic_check,
348};
349
350static irqreturn_t imx_tve_irq_handler(int irq, void *data)
351{
352 struct imx_tve *tve = data;
353 unsigned int val;
354
355 regmap_read(tve->regmap, TVE_STAT_REG, &val);
356
357 /* clear interrupt status register */
358 regmap_write(tve->regmap, TVE_STAT_REG, 0xffffffff);
359
360 return IRQ_HANDLED;
361}
362
363static unsigned long clk_tve_di_recalc_rate(struct clk_hw *hw,
364 unsigned long parent_rate)
365{
366 struct imx_tve *tve = container_of(hw, struct imx_tve, clk_hw_di);
367 unsigned int val;
368 int ret;
369
370 ret = regmap_read(tve->regmap, TVE_COM_CONF_REG, &val);
371 if (ret < 0)
372 return 0;
373
374 switch (val & TVE_DAC_SAMP_RATE_MASK) {
375 case TVE_DAC_DIV4_RATE:
376 return parent_rate / 4;
377 case TVE_DAC_DIV2_RATE:
378 return parent_rate / 2;
379 case TVE_DAC_FULL_RATE:
380 default:
381 return parent_rate;
382 }
383
384 return 0;
385}
386
387static long clk_tve_di_round_rate(struct clk_hw *hw, unsigned long rate,
388 unsigned long *prate)
389{
390 unsigned long div;
391
392 div = *prate / rate;
393 if (div >= 4)
394 return *prate / 4;
395 else if (div >= 2)
396 return *prate / 2;
397 return *prate;
398}
399
400static int clk_tve_di_set_rate(struct clk_hw *hw, unsigned long rate,
401 unsigned long parent_rate)
402{
403 struct imx_tve *tve = container_of(hw, struct imx_tve, clk_hw_di);
404 unsigned long div;
405 u32 val;
406 int ret;
407
408 div = parent_rate / rate;
409 if (div >= 4)
410 val = TVE_DAC_DIV4_RATE;
411 else if (div >= 2)
412 val = TVE_DAC_DIV2_RATE;
413 else
414 val = TVE_DAC_FULL_RATE;
415
416 ret = regmap_update_bits(tve->regmap, TVE_COM_CONF_REG,
417 TVE_DAC_SAMP_RATE_MASK, val);
418
419 if (ret < 0) {
420 dev_err(tve->dev, "failed to set divider: %d\n", ret);
421 return ret;
422 }
423
424 return 0;
425}
426
427static const struct clk_ops clk_tve_di_ops = {
428 .round_rate = clk_tve_di_round_rate,
429 .set_rate = clk_tve_di_set_rate,
430 .recalc_rate = clk_tve_di_recalc_rate,
431};
432
433static int tve_clk_init(struct imx_tve *tve, void __iomem *base)
434{
435 const char *tve_di_parent[1];
436 struct clk_init_data init = {
437 .name = "tve_di",
438 .ops = &clk_tve_di_ops,
439 .num_parents = 1,
440 .flags = 0,
441 };
442
443 tve_di_parent[0] = __clk_get_name(tve->clk);
444 init.parent_names = (const char **)&tve_di_parent;
445
446 tve->clk_hw_di.init = &init;
447 tve->di_clk = clk_register(tve->dev, &tve->clk_hw_di);
448 if (IS_ERR(tve->di_clk)) {
449 dev_err(tve->dev, "failed to register TVE output clock: %ld\n",
450 PTR_ERR(tve->di_clk));
451 return PTR_ERR(tve->di_clk);
452 }
453
454 return 0;
455}
456
457static int imx_tve_register(struct drm_device *drm, struct imx_tve *tve)
458{
459 int encoder_type;
460 int ret;
461
462 encoder_type = tve->mode == TVE_MODE_VGA ?
463 DRM_MODE_ENCODER_DAC : DRM_MODE_ENCODER_TVDAC;
464
465 ret = imx_drm_encoder_parse_of(drm, &tve->encoder, tve->dev->of_node);
466 if (ret)
467 return ret;
468
469 drm_encoder_helper_add(&tve->encoder, &imx_tve_encoder_helper_funcs);
470 drm_simple_encoder_init(drm, &tve->encoder, encoder_type);
471
472 drm_connector_helper_add(&tve->connector,
473 &imx_tve_connector_helper_funcs);
474 drm_connector_init_with_ddc(drm, &tve->connector,
475 &imx_tve_connector_funcs,
476 DRM_MODE_CONNECTOR_VGA,
477 tve->ddc);
478
479 drm_connector_attach_encoder(&tve->connector, &tve->encoder);
480
481 return 0;
482}
483
484static void imx_tve_disable_regulator(void *data)
485{
486 struct imx_tve *tve = data;
487
488 regulator_disable(tve->dac_reg);
489}
490
491static bool imx_tve_readable_reg(struct device *dev, unsigned int reg)
492{
493 return (reg % 4 == 0) && (reg <= 0xdc);
494}
495
496static struct regmap_config tve_regmap_config = {
497 .reg_bits = 32,
498 .val_bits = 32,
499 .reg_stride = 4,
500
501 .readable_reg = imx_tve_readable_reg,
502
503 .lock = tve_lock,
504 .unlock = tve_unlock,
505
506 .max_register = 0xdc,
507};
508
509static const char * const imx_tve_modes[] = {
510 [TVE_MODE_TVOUT] = "tvout",
511 [TVE_MODE_VGA] = "vga",
512};
513
514static const int of_get_tve_mode(struct device_node *np)
515{
516 const char *bm;
517 int ret, i;
518
519 ret = of_property_read_string(np, "fsl,tve-mode", &bm);
520 if (ret < 0)
521 return ret;
522
523 for (i = 0; i < ARRAY_SIZE(imx_tve_modes); i++)
524 if (!strcasecmp(bm, imx_tve_modes[i]))
525 return i;
526
527 return -EINVAL;
528}
529
530static int imx_tve_bind(struct device *dev, struct device *master, void *data)
531{
532 struct platform_device *pdev = to_platform_device(dev);
533 struct drm_device *drm = data;
534 struct device_node *np = dev->of_node;
535 struct device_node *ddc_node;
536 struct imx_tve *tve;
537 struct resource *res;
538 void __iomem *base;
539 unsigned int val;
540 int irq;
541 int ret;
542
543 tve = dev_get_drvdata(dev);
544 memset(tve, 0, sizeof(*tve));
545
546 tve->dev = dev;
547 spin_lock_init(&tve->lock);
548
549 ddc_node = of_parse_phandle(np, "ddc-i2c-bus", 0);
550 if (ddc_node) {
551 tve->ddc = of_find_i2c_adapter_by_node(ddc_node);
552 of_node_put(ddc_node);
553 }
554
555 tve->mode = of_get_tve_mode(np);
556 if (tve->mode != TVE_MODE_VGA) {
557 dev_err(dev, "only VGA mode supported, currently\n");
558 return -EINVAL;
559 }
560
561 if (tve->mode == TVE_MODE_VGA) {
562 ret = of_property_read_u32(np, "fsl,hsync-pin",
563 &tve->di_hsync_pin);
564
565 if (ret < 0) {
566 dev_err(dev, "failed to get hsync pin\n");
567 return ret;
568 }
569
570 ret = of_property_read_u32(np, "fsl,vsync-pin",
571 &tve->di_vsync_pin);
572
573 if (ret < 0) {
574 dev_err(dev, "failed to get vsync pin\n");
575 return ret;
576 }
577 }
578
579 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
580 base = devm_ioremap_resource(dev, res);
581 if (IS_ERR(base))
582 return PTR_ERR(base);
583
584 tve_regmap_config.lock_arg = tve;
585 tve->regmap = devm_regmap_init_mmio_clk(dev, "tve", base,
586 &tve_regmap_config);
587 if (IS_ERR(tve->regmap)) {
588 dev_err(dev, "failed to init regmap: %ld\n",
589 PTR_ERR(tve->regmap));
590 return PTR_ERR(tve->regmap);
591 }
592
593 irq = platform_get_irq(pdev, 0);
594 if (irq < 0)
595 return irq;
596
597 ret = devm_request_threaded_irq(dev, irq, NULL,
598 imx_tve_irq_handler, IRQF_ONESHOT,
599 "imx-tve", tve);
600 if (ret < 0) {
601 dev_err(dev, "failed to request irq: %d\n", ret);
602 return ret;
603 }
604
605 tve->dac_reg = devm_regulator_get(dev, "dac");
606 if (!IS_ERR(tve->dac_reg)) {
607 if (regulator_get_voltage(tve->dac_reg) != IMX_TVE_DAC_VOLTAGE)
608 dev_warn(dev, "dac voltage is not %d uV\n", IMX_TVE_DAC_VOLTAGE);
609 ret = regulator_enable(tve->dac_reg);
610 if (ret)
611 return ret;
612 ret = devm_add_action_or_reset(dev, imx_tve_disable_regulator, tve);
613 if (ret)
614 return ret;
615 }
616
617 tve->clk = devm_clk_get(dev, "tve");
618 if (IS_ERR(tve->clk)) {
619 dev_err(dev, "failed to get high speed tve clock: %ld\n",
620 PTR_ERR(tve->clk));
621 return PTR_ERR(tve->clk);
622 }
623
624 /* this is the IPU DI clock input selector, can be parented to tve_di */
625 tve->di_sel_clk = devm_clk_get(dev, "di_sel");
626 if (IS_ERR(tve->di_sel_clk)) {
627 dev_err(dev, "failed to get ipu di mux clock: %ld\n",
628 PTR_ERR(tve->di_sel_clk));
629 return PTR_ERR(tve->di_sel_clk);
630 }
631
632 ret = tve_clk_init(tve, base);
633 if (ret < 0)
634 return ret;
635
636 ret = regmap_read(tve->regmap, TVE_COM_CONF_REG, &val);
637 if (ret < 0) {
638 dev_err(dev, "failed to read configuration register: %d\n",
639 ret);
640 return ret;
641 }
642 if (val != 0x00100000) {
643 dev_err(dev, "configuration register default value indicates this is not a TVEv2\n");
644 return -ENODEV;
645 }
646
647 /* disable cable detection for VGA mode */
648 ret = regmap_write(tve->regmap, TVE_CD_CONT_REG, 0);
649 if (ret)
650 return ret;
651
652 ret = imx_tve_register(drm, tve);
653 if (ret)
654 return ret;
655
656 return 0;
657}
658
659static const struct component_ops imx_tve_ops = {
660 .bind = imx_tve_bind,
661};
662
663static int imx_tve_probe(struct platform_device *pdev)
664{
665 struct imx_tve *tve;
666
667 tve = devm_kzalloc(&pdev->dev, sizeof(*tve), GFP_KERNEL);
668 if (!tve)
669 return -ENOMEM;
670
671 platform_set_drvdata(pdev, tve);
672
673 return component_add(&pdev->dev, &imx_tve_ops);
674}
675
676static int imx_tve_remove(struct platform_device *pdev)
677{
678 component_del(&pdev->dev, &imx_tve_ops);
679 return 0;
680}
681
682static const struct of_device_id imx_tve_dt_ids[] = {
683 { .compatible = "fsl,imx53-tve", },
684 { /* sentinel */ }
685};
686MODULE_DEVICE_TABLE(of, imx_tve_dt_ids);
687
688static struct platform_driver imx_tve_driver = {
689 .probe = imx_tve_probe,
690 .remove = imx_tve_remove,
691 .driver = {
692 .of_match_table = imx_tve_dt_ids,
693 .name = "imx-tve",
694 },
695};
696
697module_platform_driver(imx_tve_driver);
698
699MODULE_DESCRIPTION("i.MX Television Encoder driver");
700MODULE_AUTHOR("Philipp Zabel, Pengutronix");
701MODULE_LICENSE("GPL");
702MODULE_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 int ret;
156
157 if (!tve->enabled) {
158 tve->enabled = true;
159 clk_prepare_enable(tve->clk);
160 ret = regmap_update_bits(tve->regmap, TVE_COM_CONF_REG,
161 TVE_EN, TVE_EN);
162 }
163
164 /* clear interrupt status register */
165 regmap_write(tve->regmap, TVE_STAT_REG, 0xffffffff);
166
167 /* cable detection irq disabled in VGA mode, enabled in TVOUT mode */
168 if (tve->mode == TVE_MODE_VGA)
169 regmap_write(tve->regmap, TVE_INT_CONT_REG, 0);
170 else
171 regmap_write(tve->regmap, TVE_INT_CONT_REG,
172 TVE_CD_SM_IEN |
173 TVE_CD_LM_IEN |
174 TVE_CD_MON_END_IEN);
175}
176
177static void tve_disable(struct imx_tve *tve)
178{
179 int ret;
180
181 if (tve->enabled) {
182 tve->enabled = false;
183 ret = regmap_update_bits(tve->regmap, TVE_COM_CONF_REG,
184 TVE_EN, 0);
185 clk_disable_unprepare(tve->clk);
186 }
187}
188
189static int tve_setup_tvout(struct imx_tve *tve)
190{
191 return -ENOTSUPP;
192}
193
194static int tve_setup_vga(struct imx_tve *tve)
195{
196 unsigned int mask;
197 unsigned int val;
198 int ret;
199
200 /* set gain to (1 + 10/128) to provide 0.7V peak-to-peak amplitude */
201 ret = regmap_update_bits(tve->regmap, TVE_TVDAC0_CONT_REG,
202 TVE_TVDAC_GAIN_MASK, 0x0a);
203 if (ret)
204 return ret;
205
206 ret = regmap_update_bits(tve->regmap, TVE_TVDAC1_CONT_REG,
207 TVE_TVDAC_GAIN_MASK, 0x0a);
208 if (ret)
209 return ret;
210
211 ret = regmap_update_bits(tve->regmap, TVE_TVDAC2_CONT_REG,
212 TVE_TVDAC_GAIN_MASK, 0x0a);
213 if (ret)
214 return ret;
215
216 /* set configuration register */
217 mask = TVE_DATA_SOURCE_MASK | TVE_INP_VIDEO_FORM;
218 val = TVE_DATA_SOURCE_BUS2 | TVE_INP_YCBCR_444;
219 mask |= TVE_TV_STAND_MASK | TVE_P2I_CONV_EN;
220 val |= TVE_TV_STAND_HD_1080P30 | 0;
221 mask |= TVE_TV_OUT_MODE_MASK | TVE_SYNC_CH_0_EN;
222 val |= TVE_TV_OUT_RGB | TVE_SYNC_CH_0_EN;
223 ret = regmap_update_bits(tve->regmap, TVE_COM_CONF_REG, mask, val);
224 if (ret)
225 return ret;
226
227 /* set test mode (as documented) */
228 return regmap_update_bits(tve->regmap, TVE_TST_MODE_REG,
229 TVE_TVDAC_TEST_MODE_MASK, 1);
230}
231
232static int imx_tve_connector_get_modes(struct drm_connector *connector)
233{
234 struct imx_tve *tve = con_to_tve(connector);
235 struct edid *edid;
236 int ret = 0;
237
238 if (!tve->ddc)
239 return 0;
240
241 edid = drm_get_edid(connector, tve->ddc);
242 if (edid) {
243 drm_mode_connector_update_edid_property(connector, edid);
244 ret = drm_add_edid_modes(connector, edid);
245 kfree(edid);
246 }
247
248 return ret;
249}
250
251static int imx_tve_connector_mode_valid(struct drm_connector *connector,
252 struct drm_display_mode *mode)
253{
254 struct imx_tve *tve = con_to_tve(connector);
255 unsigned long rate;
256
257 /* pixel clock with 2x oversampling */
258 rate = clk_round_rate(tve->clk, 2000UL * mode->clock) / 2000;
259 if (rate == mode->clock)
260 return MODE_OK;
261
262 /* pixel clock without oversampling */
263 rate = clk_round_rate(tve->clk, 1000UL * mode->clock) / 1000;
264 if (rate == mode->clock)
265 return MODE_OK;
266
267 dev_warn(tve->dev, "ignoring mode %dx%d\n",
268 mode->hdisplay, mode->vdisplay);
269
270 return MODE_BAD;
271}
272
273static struct drm_encoder *imx_tve_connector_best_encoder(
274 struct drm_connector *connector)
275{
276 struct imx_tve *tve = con_to_tve(connector);
277
278 return &tve->encoder;
279}
280
281static void imx_tve_encoder_mode_set(struct drm_encoder *encoder,
282 struct drm_display_mode *orig_mode,
283 struct drm_display_mode *mode)
284{
285 struct imx_tve *tve = enc_to_tve(encoder);
286 unsigned long rounded_rate;
287 unsigned long rate;
288 int div = 1;
289 int ret;
290
291 /*
292 * FIXME
293 * we should try 4k * mode->clock first,
294 * and enable 4x oversampling for lower resolutions
295 */
296 rate = 2000UL * mode->clock;
297 clk_set_rate(tve->clk, rate);
298 rounded_rate = clk_get_rate(tve->clk);
299 if (rounded_rate >= rate)
300 div = 2;
301 clk_set_rate(tve->di_clk, rounded_rate / div);
302
303 ret = clk_set_parent(tve->di_sel_clk, tve->di_clk);
304 if (ret < 0) {
305 dev_err(tve->dev, "failed to set di_sel parent to tve_di: %d\n",
306 ret);
307 }
308
309 regmap_update_bits(tve->regmap, TVE_COM_CONF_REG,
310 TVE_IPU_CLK_EN, TVE_IPU_CLK_EN);
311
312 if (tve->mode == TVE_MODE_VGA)
313 ret = tve_setup_vga(tve);
314 else
315 ret = tve_setup_tvout(tve);
316 if (ret)
317 dev_err(tve->dev, "failed to set configuration: %d\n", ret);
318}
319
320static void imx_tve_encoder_enable(struct drm_encoder *encoder)
321{
322 struct imx_tve *tve = enc_to_tve(encoder);
323
324 tve_enable(tve);
325}
326
327static void imx_tve_encoder_disable(struct drm_encoder *encoder)
328{
329 struct imx_tve *tve = enc_to_tve(encoder);
330
331 tve_disable(tve);
332}
333
334static int imx_tve_atomic_check(struct drm_encoder *encoder,
335 struct drm_crtc_state *crtc_state,
336 struct drm_connector_state *conn_state)
337{
338 struct imx_crtc_state *imx_crtc_state = to_imx_crtc_state(crtc_state);
339 struct imx_tve *tve = enc_to_tve(encoder);
340
341 imx_crtc_state->bus_format = MEDIA_BUS_FMT_GBR888_1X24;
342 imx_crtc_state->di_hsync_pin = tve->di_hsync_pin;
343 imx_crtc_state->di_vsync_pin = tve->di_vsync_pin;
344
345 return 0;
346}
347
348static const struct drm_connector_funcs imx_tve_connector_funcs = {
349 .dpms = drm_atomic_helper_connector_dpms,
350 .fill_modes = drm_helper_probe_single_connector_modes,
351 .destroy = imx_drm_connector_destroy,
352 .reset = drm_atomic_helper_connector_reset,
353 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
354 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
355};
356
357static const struct drm_connector_helper_funcs imx_tve_connector_helper_funcs = {
358 .get_modes = imx_tve_connector_get_modes,
359 .best_encoder = imx_tve_connector_best_encoder,
360 .mode_valid = imx_tve_connector_mode_valid,
361};
362
363static const struct drm_encoder_funcs imx_tve_encoder_funcs = {
364 .destroy = imx_drm_encoder_destroy,
365};
366
367static const struct drm_encoder_helper_funcs imx_tve_encoder_helper_funcs = {
368 .mode_set = imx_tve_encoder_mode_set,
369 .enable = imx_tve_encoder_enable,
370 .disable = imx_tve_encoder_disable,
371 .atomic_check = imx_tve_atomic_check,
372};
373
374static irqreturn_t imx_tve_irq_handler(int irq, void *data)
375{
376 struct imx_tve *tve = data;
377 unsigned int val;
378
379 regmap_read(tve->regmap, TVE_STAT_REG, &val);
380
381 /* clear interrupt status register */
382 regmap_write(tve->regmap, TVE_STAT_REG, 0xffffffff);
383
384 return IRQ_HANDLED;
385}
386
387static unsigned long clk_tve_di_recalc_rate(struct clk_hw *hw,
388 unsigned long parent_rate)
389{
390 struct imx_tve *tve = container_of(hw, struct imx_tve, clk_hw_di);
391 unsigned int val;
392 int ret;
393
394 ret = regmap_read(tve->regmap, TVE_COM_CONF_REG, &val);
395 if (ret < 0)
396 return 0;
397
398 switch (val & TVE_DAC_SAMP_RATE_MASK) {
399 case TVE_DAC_DIV4_RATE:
400 return parent_rate / 4;
401 case TVE_DAC_DIV2_RATE:
402 return parent_rate / 2;
403 case TVE_DAC_FULL_RATE:
404 default:
405 return parent_rate;
406 }
407
408 return 0;
409}
410
411static long clk_tve_di_round_rate(struct clk_hw *hw, unsigned long rate,
412 unsigned long *prate)
413{
414 unsigned long div;
415
416 div = *prate / rate;
417 if (div >= 4)
418 return *prate / 4;
419 else if (div >= 2)
420 return *prate / 2;
421 return *prate;
422}
423
424static int clk_tve_di_set_rate(struct clk_hw *hw, unsigned long rate,
425 unsigned long parent_rate)
426{
427 struct imx_tve *tve = container_of(hw, struct imx_tve, clk_hw_di);
428 unsigned long div;
429 u32 val;
430 int ret;
431
432 div = parent_rate / rate;
433 if (div >= 4)
434 val = TVE_DAC_DIV4_RATE;
435 else if (div >= 2)
436 val = TVE_DAC_DIV2_RATE;
437 else
438 val = TVE_DAC_FULL_RATE;
439
440 ret = regmap_update_bits(tve->regmap, TVE_COM_CONF_REG,
441 TVE_DAC_SAMP_RATE_MASK, val);
442
443 if (ret < 0) {
444 dev_err(tve->dev, "failed to set divider: %d\n", ret);
445 return ret;
446 }
447
448 return 0;
449}
450
451static struct clk_ops clk_tve_di_ops = {
452 .round_rate = clk_tve_di_round_rate,
453 .set_rate = clk_tve_di_set_rate,
454 .recalc_rate = clk_tve_di_recalc_rate,
455};
456
457static int tve_clk_init(struct imx_tve *tve, void __iomem *base)
458{
459 const char *tve_di_parent[1];
460 struct clk_init_data init = {
461 .name = "tve_di",
462 .ops = &clk_tve_di_ops,
463 .num_parents = 1,
464 .flags = 0,
465 };
466
467 tve_di_parent[0] = __clk_get_name(tve->clk);
468 init.parent_names = (const char **)&tve_di_parent;
469
470 tve->clk_hw_di.init = &init;
471 tve->di_clk = clk_register(tve->dev, &tve->clk_hw_di);
472 if (IS_ERR(tve->di_clk)) {
473 dev_err(tve->dev, "failed to register TVE output clock: %ld\n",
474 PTR_ERR(tve->di_clk));
475 return PTR_ERR(tve->di_clk);
476 }
477
478 return 0;
479}
480
481static int imx_tve_register(struct drm_device *drm, struct imx_tve *tve)
482{
483 int encoder_type;
484 int ret;
485
486 encoder_type = tve->mode == TVE_MODE_VGA ?
487 DRM_MODE_ENCODER_DAC : DRM_MODE_ENCODER_TVDAC;
488
489 ret = imx_drm_encoder_parse_of(drm, &tve->encoder, tve->dev->of_node);
490 if (ret)
491 return ret;
492
493 drm_encoder_helper_add(&tve->encoder, &imx_tve_encoder_helper_funcs);
494 drm_encoder_init(drm, &tve->encoder, &imx_tve_encoder_funcs,
495 encoder_type, NULL);
496
497 drm_connector_helper_add(&tve->connector,
498 &imx_tve_connector_helper_funcs);
499 drm_connector_init(drm, &tve->connector, &imx_tve_connector_funcs,
500 DRM_MODE_CONNECTOR_VGA);
501
502 drm_mode_connector_attach_encoder(&tve->connector, &tve->encoder);
503
504 return 0;
505}
506
507static bool imx_tve_readable_reg(struct device *dev, unsigned int reg)
508{
509 return (reg % 4 == 0) && (reg <= 0xdc);
510}
511
512static struct regmap_config tve_regmap_config = {
513 .reg_bits = 32,
514 .val_bits = 32,
515 .reg_stride = 4,
516
517 .readable_reg = imx_tve_readable_reg,
518
519 .lock = tve_lock,
520 .unlock = tve_unlock,
521
522 .max_register = 0xdc,
523};
524
525static const char * const imx_tve_modes[] = {
526 [TVE_MODE_TVOUT] = "tvout",
527 [TVE_MODE_VGA] = "vga",
528};
529
530static const int of_get_tve_mode(struct device_node *np)
531{
532 const char *bm;
533 int ret, i;
534
535 ret = of_property_read_string(np, "fsl,tve-mode", &bm);
536 if (ret < 0)
537 return ret;
538
539 for (i = 0; i < ARRAY_SIZE(imx_tve_modes); i++)
540 if (!strcasecmp(bm, imx_tve_modes[i]))
541 return i;
542
543 return -EINVAL;
544}
545
546static int imx_tve_bind(struct device *dev, struct device *master, void *data)
547{
548 struct platform_device *pdev = to_platform_device(dev);
549 struct drm_device *drm = data;
550 struct device_node *np = dev->of_node;
551 struct device_node *ddc_node;
552 struct imx_tve *tve;
553 struct resource *res;
554 void __iomem *base;
555 unsigned int val;
556 int irq;
557 int ret;
558
559 tve = devm_kzalloc(dev, sizeof(*tve), GFP_KERNEL);
560 if (!tve)
561 return -ENOMEM;
562
563 tve->dev = dev;
564 spin_lock_init(&tve->lock);
565
566 ddc_node = of_parse_phandle(np, "ddc-i2c-bus", 0);
567 if (ddc_node) {
568 tve->ddc = of_find_i2c_adapter_by_node(ddc_node);
569 of_node_put(ddc_node);
570 }
571
572 tve->mode = of_get_tve_mode(np);
573 if (tve->mode != TVE_MODE_VGA) {
574 dev_err(dev, "only VGA mode supported, currently\n");
575 return -EINVAL;
576 }
577
578 if (tve->mode == TVE_MODE_VGA) {
579 ret = of_property_read_u32(np, "fsl,hsync-pin",
580 &tve->di_hsync_pin);
581
582 if (ret < 0) {
583 dev_err(dev, "failed to get hsync pin\n");
584 return ret;
585 }
586
587 ret = of_property_read_u32(np, "fsl,vsync-pin",
588 &tve->di_vsync_pin);
589
590 if (ret < 0) {
591 dev_err(dev, "failed to get vsync pin\n");
592 return ret;
593 }
594 }
595
596 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
597 base = devm_ioremap_resource(dev, res);
598 if (IS_ERR(base))
599 return PTR_ERR(base);
600
601 tve_regmap_config.lock_arg = tve;
602 tve->regmap = devm_regmap_init_mmio_clk(dev, "tve", base,
603 &tve_regmap_config);
604 if (IS_ERR(tve->regmap)) {
605 dev_err(dev, "failed to init regmap: %ld\n",
606 PTR_ERR(tve->regmap));
607 return PTR_ERR(tve->regmap);
608 }
609
610 irq = platform_get_irq(pdev, 0);
611 if (irq < 0) {
612 dev_err(dev, "failed to get irq\n");
613 return irq;
614 }
615
616 ret = devm_request_threaded_irq(dev, irq, NULL,
617 imx_tve_irq_handler, IRQF_ONESHOT,
618 "imx-tve", tve);
619 if (ret < 0) {
620 dev_err(dev, "failed to request irq: %d\n", ret);
621 return ret;
622 }
623
624 tve->dac_reg = devm_regulator_get(dev, "dac");
625 if (!IS_ERR(tve->dac_reg)) {
626 if (regulator_get_voltage(tve->dac_reg) != IMX_TVE_DAC_VOLTAGE)
627 dev_warn(dev, "dac voltage is not %d uV\n", IMX_TVE_DAC_VOLTAGE);
628 ret = regulator_enable(tve->dac_reg);
629 if (ret)
630 return ret;
631 }
632
633 tve->clk = devm_clk_get(dev, "tve");
634 if (IS_ERR(tve->clk)) {
635 dev_err(dev, "failed to get high speed tve clock: %ld\n",
636 PTR_ERR(tve->clk));
637 return PTR_ERR(tve->clk);
638 }
639
640 /* this is the IPU DI clock input selector, can be parented to tve_di */
641 tve->di_sel_clk = devm_clk_get(dev, "di_sel");
642 if (IS_ERR(tve->di_sel_clk)) {
643 dev_err(dev, "failed to get ipu di mux clock: %ld\n",
644 PTR_ERR(tve->di_sel_clk));
645 return PTR_ERR(tve->di_sel_clk);
646 }
647
648 ret = tve_clk_init(tve, base);
649 if (ret < 0)
650 return ret;
651
652 ret = regmap_read(tve->regmap, TVE_COM_CONF_REG, &val);
653 if (ret < 0) {
654 dev_err(dev, "failed to read configuration register: %d\n",
655 ret);
656 return ret;
657 }
658 if (val != 0x00100000) {
659 dev_err(dev, "configuration register default value indicates this is not a TVEv2\n");
660 return -ENODEV;
661 }
662
663 /* disable cable detection for VGA mode */
664 ret = regmap_write(tve->regmap, TVE_CD_CONT_REG, 0);
665 if (ret)
666 return ret;
667
668 ret = imx_tve_register(drm, tve);
669 if (ret)
670 return ret;
671
672 dev_set_drvdata(dev, tve);
673
674 return 0;
675}
676
677static void imx_tve_unbind(struct device *dev, struct device *master,
678 void *data)
679{
680 struct imx_tve *tve = dev_get_drvdata(dev);
681
682 if (!IS_ERR(tve->dac_reg))
683 regulator_disable(tve->dac_reg);
684}
685
686static const struct component_ops imx_tve_ops = {
687 .bind = imx_tve_bind,
688 .unbind = imx_tve_unbind,
689};
690
691static int imx_tve_probe(struct platform_device *pdev)
692{
693 return component_add(&pdev->dev, &imx_tve_ops);
694}
695
696static int imx_tve_remove(struct platform_device *pdev)
697{
698 component_del(&pdev->dev, &imx_tve_ops);
699 return 0;
700}
701
702static const struct of_device_id imx_tve_dt_ids[] = {
703 { .compatible = "fsl,imx53-tve", },
704 { /* sentinel */ }
705};
706MODULE_DEVICE_TABLE(of, imx_tve_dt_ids);
707
708static struct platform_driver imx_tve_driver = {
709 .probe = imx_tve_probe,
710 .remove = imx_tve_remove,
711 .driver = {
712 .of_match_table = imx_tve_dt_ids,
713 .name = "imx-tve",
714 },
715};
716
717module_platform_driver(imx_tve_driver);
718
719MODULE_DESCRIPTION("i.MX Television Encoder driver");
720MODULE_AUTHOR("Philipp Zabel, Pengutronix");
721MODULE_LICENSE("GPL");
722MODULE_ALIAS("platform:imx-tve");