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1/*
2 * Copyright (C) 2015 Free Electrons
3 * Copyright (C) 2015 NextThing Co
4 *
5 * Maxime Ripard <maxime.ripard@free-electrons.com>
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
11 */
12
13#include <linux/clk.h>
14#include <linux/component.h>
15#include <linux/of_address.h>
16#include <linux/regmap.h>
17#include <linux/reset.h>
18
19#include <drm/drmP.h>
20#include <drm/drm_atomic_helper.h>
21#include <drm/drm_crtc_helper.h>
22#include <drm/drm_of.h>
23#include <drm/drm_panel.h>
24
25#include "sun4i_crtc.h"
26#include "sun4i_drv.h"
27#include "sunxi_engine.h"
28
29#define SUN4I_TVE_EN_REG 0x000
30#define SUN4I_TVE_EN_DAC_MAP_MASK GENMASK(19, 4)
31#define SUN4I_TVE_EN_DAC_MAP(dac, out) (((out) & 0xf) << (dac + 1) * 4)
32#define SUN4I_TVE_EN_ENABLE BIT(0)
33
34#define SUN4I_TVE_CFG0_REG 0x004
35#define SUN4I_TVE_CFG0_DAC_CONTROL_54M BIT(26)
36#define SUN4I_TVE_CFG0_CORE_DATAPATH_54M BIT(25)
37#define SUN4I_TVE_CFG0_CORE_CONTROL_54M BIT(24)
38#define SUN4I_TVE_CFG0_YC_EN BIT(17)
39#define SUN4I_TVE_CFG0_COMP_EN BIT(16)
40#define SUN4I_TVE_CFG0_RES(x) ((x) & 0xf)
41#define SUN4I_TVE_CFG0_RES_480i SUN4I_TVE_CFG0_RES(0)
42#define SUN4I_TVE_CFG0_RES_576i SUN4I_TVE_CFG0_RES(1)
43
44#define SUN4I_TVE_DAC0_REG 0x008
45#define SUN4I_TVE_DAC0_CLOCK_INVERT BIT(24)
46#define SUN4I_TVE_DAC0_LUMA(x) (((x) & 3) << 20)
47#define SUN4I_TVE_DAC0_LUMA_0_4 SUN4I_TVE_DAC0_LUMA(3)
48#define SUN4I_TVE_DAC0_CHROMA(x) (((x) & 3) << 18)
49#define SUN4I_TVE_DAC0_CHROMA_0_75 SUN4I_TVE_DAC0_CHROMA(3)
50#define SUN4I_TVE_DAC0_INTERNAL_DAC(x) (((x) & 3) << 16)
51#define SUN4I_TVE_DAC0_INTERNAL_DAC_37_5_OHMS SUN4I_TVE_DAC0_INTERNAL_DAC(3)
52#define SUN4I_TVE_DAC0_DAC_EN(dac) BIT(dac)
53
54#define SUN4I_TVE_NOTCH_REG 0x00c
55#define SUN4I_TVE_NOTCH_DAC0_TO_DAC_DLY(dac, x) ((4 - (x)) << (dac * 3))
56
57#define SUN4I_TVE_CHROMA_FREQ_REG 0x010
58
59#define SUN4I_TVE_PORCH_REG 0x014
60#define SUN4I_TVE_PORCH_BACK(x) ((x) << 16)
61#define SUN4I_TVE_PORCH_FRONT(x) (x)
62
63#define SUN4I_TVE_LINE_REG 0x01c
64#define SUN4I_TVE_LINE_FIRST(x) ((x) << 16)
65#define SUN4I_TVE_LINE_NUMBER(x) (x)
66
67#define SUN4I_TVE_LEVEL_REG 0x020
68#define SUN4I_TVE_LEVEL_BLANK(x) ((x) << 16)
69#define SUN4I_TVE_LEVEL_BLACK(x) (x)
70
71#define SUN4I_TVE_DAC1_REG 0x024
72#define SUN4I_TVE_DAC1_AMPLITUDE(dac, x) ((x) << (dac * 8))
73
74#define SUN4I_TVE_DETECT_STA_REG 0x038
75#define SUN4I_TVE_DETECT_STA_DAC(dac) BIT((dac * 8))
76#define SUN4I_TVE_DETECT_STA_UNCONNECTED 0
77#define SUN4I_TVE_DETECT_STA_CONNECTED 1
78#define SUN4I_TVE_DETECT_STA_GROUND 2
79
80#define SUN4I_TVE_CB_CR_LVL_REG 0x10c
81#define SUN4I_TVE_CB_CR_LVL_CR_BURST(x) ((x) << 8)
82#define SUN4I_TVE_CB_CR_LVL_CB_BURST(x) (x)
83
84#define SUN4I_TVE_TINT_BURST_PHASE_REG 0x110
85#define SUN4I_TVE_TINT_BURST_PHASE_CHROMA(x) (x)
86
87#define SUN4I_TVE_BURST_WIDTH_REG 0x114
88#define SUN4I_TVE_BURST_WIDTH_BREEZEWAY(x) ((x) << 16)
89#define SUN4I_TVE_BURST_WIDTH_BURST_WIDTH(x) ((x) << 8)
90#define SUN4I_TVE_BURST_WIDTH_HSYNC_WIDTH(x) (x)
91
92#define SUN4I_TVE_CB_CR_GAIN_REG 0x118
93#define SUN4I_TVE_CB_CR_GAIN_CR(x) ((x) << 8)
94#define SUN4I_TVE_CB_CR_GAIN_CB(x) (x)
95
96#define SUN4I_TVE_SYNC_VBI_REG 0x11c
97#define SUN4I_TVE_SYNC_VBI_SYNC(x) ((x) << 16)
98#define SUN4I_TVE_SYNC_VBI_VBLANK(x) (x)
99
100#define SUN4I_TVE_ACTIVE_LINE_REG 0x124
101#define SUN4I_TVE_ACTIVE_LINE(x) (x)
102
103#define SUN4I_TVE_CHROMA_REG 0x128
104#define SUN4I_TVE_CHROMA_COMP_GAIN(x) ((x) & 3)
105#define SUN4I_TVE_CHROMA_COMP_GAIN_50 SUN4I_TVE_CHROMA_COMP_GAIN(2)
106
107#define SUN4I_TVE_12C_REG 0x12c
108#define SUN4I_TVE_12C_NOTCH_WIDTH_WIDE BIT(8)
109#define SUN4I_TVE_12C_COMP_YUV_EN BIT(0)
110
111#define SUN4I_TVE_RESYNC_REG 0x130
112#define SUN4I_TVE_RESYNC_FIELD BIT(31)
113#define SUN4I_TVE_RESYNC_LINE(x) ((x) << 16)
114#define SUN4I_TVE_RESYNC_PIXEL(x) (x)
115
116#define SUN4I_TVE_SLAVE_REG 0x134
117
118#define SUN4I_TVE_WSS_DATA2_REG 0x244
119
120struct color_gains {
121 u16 cb;
122 u16 cr;
123};
124
125struct burst_levels {
126 u16 cb;
127 u16 cr;
128};
129
130struct video_levels {
131 u16 black;
132 u16 blank;
133};
134
135struct resync_parameters {
136 bool field;
137 u16 line;
138 u16 pixel;
139};
140
141struct tv_mode {
142 char *name;
143
144 u32 mode;
145 u32 chroma_freq;
146 u16 back_porch;
147 u16 front_porch;
148 u16 line_number;
149 u16 vblank_level;
150
151 u32 hdisplay;
152 u16 hfront_porch;
153 u16 hsync_len;
154 u16 hback_porch;
155
156 u32 vdisplay;
157 u16 vfront_porch;
158 u16 vsync_len;
159 u16 vback_porch;
160
161 bool yc_en;
162 bool dac3_en;
163 bool dac_bit25_en;
164
165 const struct color_gains *color_gains;
166 const struct burst_levels *burst_levels;
167 const struct video_levels *video_levels;
168 const struct resync_parameters *resync_params;
169};
170
171struct sun4i_tv {
172 struct drm_connector connector;
173 struct drm_encoder encoder;
174
175 struct clk *clk;
176 struct regmap *regs;
177 struct reset_control *reset;
178
179 struct sun4i_drv *drv;
180};
181
182static const struct video_levels ntsc_video_levels = {
183 .black = 282, .blank = 240,
184};
185
186static const struct video_levels pal_video_levels = {
187 .black = 252, .blank = 252,
188};
189
190static const struct burst_levels ntsc_burst_levels = {
191 .cb = 79, .cr = 0,
192};
193
194static const struct burst_levels pal_burst_levels = {
195 .cb = 40, .cr = 40,
196};
197
198static const struct color_gains ntsc_color_gains = {
199 .cb = 160, .cr = 160,
200};
201
202static const struct color_gains pal_color_gains = {
203 .cb = 224, .cr = 224,
204};
205
206static const struct resync_parameters ntsc_resync_parameters = {
207 .field = false, .line = 14, .pixel = 12,
208};
209
210static const struct resync_parameters pal_resync_parameters = {
211 .field = true, .line = 13, .pixel = 12,
212};
213
214static const struct tv_mode tv_modes[] = {
215 {
216 .name = "NTSC",
217 .mode = SUN4I_TVE_CFG0_RES_480i,
218 .chroma_freq = 0x21f07c1f,
219 .yc_en = true,
220 .dac3_en = true,
221 .dac_bit25_en = true,
222
223 .back_porch = 118,
224 .front_porch = 32,
225 .line_number = 525,
226
227 .hdisplay = 720,
228 .hfront_porch = 18,
229 .hsync_len = 2,
230 .hback_porch = 118,
231
232 .vdisplay = 480,
233 .vfront_porch = 26,
234 .vsync_len = 2,
235 .vback_porch = 17,
236
237 .vblank_level = 240,
238
239 .color_gains = &ntsc_color_gains,
240 .burst_levels = &ntsc_burst_levels,
241 .video_levels = &ntsc_video_levels,
242 .resync_params = &ntsc_resync_parameters,
243 },
244 {
245 .name = "PAL",
246 .mode = SUN4I_TVE_CFG0_RES_576i,
247 .chroma_freq = 0x2a098acb,
248
249 .back_porch = 138,
250 .front_porch = 24,
251 .line_number = 625,
252
253 .hdisplay = 720,
254 .hfront_porch = 3,
255 .hsync_len = 2,
256 .hback_porch = 139,
257
258 .vdisplay = 576,
259 .vfront_porch = 28,
260 .vsync_len = 2,
261 .vback_porch = 19,
262
263 .vblank_level = 252,
264
265 .color_gains = &pal_color_gains,
266 .burst_levels = &pal_burst_levels,
267 .video_levels = &pal_video_levels,
268 .resync_params = &pal_resync_parameters,
269 },
270};
271
272static inline struct sun4i_tv *
273drm_encoder_to_sun4i_tv(struct drm_encoder *encoder)
274{
275 return container_of(encoder, struct sun4i_tv,
276 encoder);
277}
278
279static inline struct sun4i_tv *
280drm_connector_to_sun4i_tv(struct drm_connector *connector)
281{
282 return container_of(connector, struct sun4i_tv,
283 connector);
284}
285
286/*
287 * FIXME: If only the drm_display_mode private field was usable, this
288 * could go away...
289 *
290 * So far, it doesn't seem to be preserved when the mode is passed by
291 * to mode_set for some reason.
292 */
293static const struct tv_mode *sun4i_tv_find_tv_by_mode(const struct drm_display_mode *mode)
294{
295 int i;
296
297 /* First try to identify the mode by name */
298 for (i = 0; i < ARRAY_SIZE(tv_modes); i++) {
299 const struct tv_mode *tv_mode = &tv_modes[i];
300
301 DRM_DEBUG_DRIVER("Comparing mode %s vs %s",
302 mode->name, tv_mode->name);
303
304 if (!strcmp(mode->name, tv_mode->name))
305 return tv_mode;
306 }
307
308 /* Then by number of lines */
309 for (i = 0; i < ARRAY_SIZE(tv_modes); i++) {
310 const struct tv_mode *tv_mode = &tv_modes[i];
311
312 DRM_DEBUG_DRIVER("Comparing mode %s vs %s (X: %d vs %d)",
313 mode->name, tv_mode->name,
314 mode->vdisplay, tv_mode->vdisplay);
315
316 if (mode->vdisplay == tv_mode->vdisplay)
317 return tv_mode;
318 }
319
320 return NULL;
321}
322
323static void sun4i_tv_mode_to_drm_mode(const struct tv_mode *tv_mode,
324 struct drm_display_mode *mode)
325{
326 DRM_DEBUG_DRIVER("Creating mode %s\n", mode->name);
327
328 mode->type = DRM_MODE_TYPE_DRIVER;
329 mode->clock = 13500;
330 mode->flags = DRM_MODE_FLAG_INTERLACE;
331
332 mode->hdisplay = tv_mode->hdisplay;
333 mode->hsync_start = mode->hdisplay + tv_mode->hfront_porch;
334 mode->hsync_end = mode->hsync_start + tv_mode->hsync_len;
335 mode->htotal = mode->hsync_end + tv_mode->hback_porch;
336
337 mode->vdisplay = tv_mode->vdisplay;
338 mode->vsync_start = mode->vdisplay + tv_mode->vfront_porch;
339 mode->vsync_end = mode->vsync_start + tv_mode->vsync_len;
340 mode->vtotal = mode->vsync_end + tv_mode->vback_porch;
341}
342
343static void sun4i_tv_disable(struct drm_encoder *encoder)
344{
345 struct sun4i_tv *tv = drm_encoder_to_sun4i_tv(encoder);
346 struct sun4i_crtc *crtc = drm_crtc_to_sun4i_crtc(encoder->crtc);
347
348 DRM_DEBUG_DRIVER("Disabling the TV Output\n");
349
350 regmap_update_bits(tv->regs, SUN4I_TVE_EN_REG,
351 SUN4I_TVE_EN_ENABLE,
352 0);
353
354 sunxi_engine_disable_color_correction(crtc->engine);
355}
356
357static void sun4i_tv_enable(struct drm_encoder *encoder)
358{
359 struct sun4i_tv *tv = drm_encoder_to_sun4i_tv(encoder);
360 struct sun4i_crtc *crtc = drm_crtc_to_sun4i_crtc(encoder->crtc);
361
362 DRM_DEBUG_DRIVER("Enabling the TV Output\n");
363
364 sunxi_engine_apply_color_correction(crtc->engine);
365
366 regmap_update_bits(tv->regs, SUN4I_TVE_EN_REG,
367 SUN4I_TVE_EN_ENABLE,
368 SUN4I_TVE_EN_ENABLE);
369}
370
371static void sun4i_tv_mode_set(struct drm_encoder *encoder,
372 struct drm_display_mode *mode,
373 struct drm_display_mode *adjusted_mode)
374{
375 struct sun4i_tv *tv = drm_encoder_to_sun4i_tv(encoder);
376 const struct tv_mode *tv_mode = sun4i_tv_find_tv_by_mode(mode);
377
378 /* Enable and map the DAC to the output */
379 regmap_update_bits(tv->regs, SUN4I_TVE_EN_REG,
380 SUN4I_TVE_EN_DAC_MAP_MASK,
381 SUN4I_TVE_EN_DAC_MAP(0, 1) |
382 SUN4I_TVE_EN_DAC_MAP(1, 2) |
383 SUN4I_TVE_EN_DAC_MAP(2, 3) |
384 SUN4I_TVE_EN_DAC_MAP(3, 4));
385
386 /* Set PAL settings */
387 regmap_write(tv->regs, SUN4I_TVE_CFG0_REG,
388 tv_mode->mode |
389 (tv_mode->yc_en ? SUN4I_TVE_CFG0_YC_EN : 0) |
390 SUN4I_TVE_CFG0_COMP_EN |
391 SUN4I_TVE_CFG0_DAC_CONTROL_54M |
392 SUN4I_TVE_CFG0_CORE_DATAPATH_54M |
393 SUN4I_TVE_CFG0_CORE_CONTROL_54M);
394
395 /* Configure the DAC for a composite output */
396 regmap_write(tv->regs, SUN4I_TVE_DAC0_REG,
397 SUN4I_TVE_DAC0_DAC_EN(0) |
398 (tv_mode->dac3_en ? SUN4I_TVE_DAC0_DAC_EN(3) : 0) |
399 SUN4I_TVE_DAC0_INTERNAL_DAC_37_5_OHMS |
400 SUN4I_TVE_DAC0_CHROMA_0_75 |
401 SUN4I_TVE_DAC0_LUMA_0_4 |
402 SUN4I_TVE_DAC0_CLOCK_INVERT |
403 (tv_mode->dac_bit25_en ? BIT(25) : 0) |
404 BIT(30));
405
406 /* Configure the sample delay between DAC0 and the other DAC */
407 regmap_write(tv->regs, SUN4I_TVE_NOTCH_REG,
408 SUN4I_TVE_NOTCH_DAC0_TO_DAC_DLY(1, 0) |
409 SUN4I_TVE_NOTCH_DAC0_TO_DAC_DLY(2, 0));
410
411 regmap_write(tv->regs, SUN4I_TVE_CHROMA_FREQ_REG,
412 tv_mode->chroma_freq);
413
414 /* Set the front and back porch */
415 regmap_write(tv->regs, SUN4I_TVE_PORCH_REG,
416 SUN4I_TVE_PORCH_BACK(tv_mode->back_porch) |
417 SUN4I_TVE_PORCH_FRONT(tv_mode->front_porch));
418
419 /* Set the lines setup */
420 regmap_write(tv->regs, SUN4I_TVE_LINE_REG,
421 SUN4I_TVE_LINE_FIRST(22) |
422 SUN4I_TVE_LINE_NUMBER(tv_mode->line_number));
423
424 regmap_write(tv->regs, SUN4I_TVE_LEVEL_REG,
425 SUN4I_TVE_LEVEL_BLANK(tv_mode->video_levels->blank) |
426 SUN4I_TVE_LEVEL_BLACK(tv_mode->video_levels->black));
427
428 regmap_write(tv->regs, SUN4I_TVE_DAC1_REG,
429 SUN4I_TVE_DAC1_AMPLITUDE(0, 0x18) |
430 SUN4I_TVE_DAC1_AMPLITUDE(1, 0x18) |
431 SUN4I_TVE_DAC1_AMPLITUDE(2, 0x18) |
432 SUN4I_TVE_DAC1_AMPLITUDE(3, 0x18));
433
434 regmap_write(tv->regs, SUN4I_TVE_CB_CR_LVL_REG,
435 SUN4I_TVE_CB_CR_LVL_CB_BURST(tv_mode->burst_levels->cb) |
436 SUN4I_TVE_CB_CR_LVL_CR_BURST(tv_mode->burst_levels->cr));
437
438 /* Set burst width for a composite output */
439 regmap_write(tv->regs, SUN4I_TVE_BURST_WIDTH_REG,
440 SUN4I_TVE_BURST_WIDTH_HSYNC_WIDTH(126) |
441 SUN4I_TVE_BURST_WIDTH_BURST_WIDTH(68) |
442 SUN4I_TVE_BURST_WIDTH_BREEZEWAY(22));
443
444 regmap_write(tv->regs, SUN4I_TVE_CB_CR_GAIN_REG,
445 SUN4I_TVE_CB_CR_GAIN_CB(tv_mode->color_gains->cb) |
446 SUN4I_TVE_CB_CR_GAIN_CR(tv_mode->color_gains->cr));
447
448 regmap_write(tv->regs, SUN4I_TVE_SYNC_VBI_REG,
449 SUN4I_TVE_SYNC_VBI_SYNC(0x10) |
450 SUN4I_TVE_SYNC_VBI_VBLANK(tv_mode->vblank_level));
451
452 regmap_write(tv->regs, SUN4I_TVE_ACTIVE_LINE_REG,
453 SUN4I_TVE_ACTIVE_LINE(1440));
454
455 /* Set composite chroma gain to 50 % */
456 regmap_write(tv->regs, SUN4I_TVE_CHROMA_REG,
457 SUN4I_TVE_CHROMA_COMP_GAIN_50);
458
459 regmap_write(tv->regs, SUN4I_TVE_12C_REG,
460 SUN4I_TVE_12C_COMP_YUV_EN |
461 SUN4I_TVE_12C_NOTCH_WIDTH_WIDE);
462
463 regmap_write(tv->regs, SUN4I_TVE_RESYNC_REG,
464 SUN4I_TVE_RESYNC_PIXEL(tv_mode->resync_params->pixel) |
465 SUN4I_TVE_RESYNC_LINE(tv_mode->resync_params->line) |
466 (tv_mode->resync_params->field ?
467 SUN4I_TVE_RESYNC_FIELD : 0));
468
469 regmap_write(tv->regs, SUN4I_TVE_SLAVE_REG, 0);
470}
471
472static struct drm_encoder_helper_funcs sun4i_tv_helper_funcs = {
473 .disable = sun4i_tv_disable,
474 .enable = sun4i_tv_enable,
475 .mode_set = sun4i_tv_mode_set,
476};
477
478static void sun4i_tv_destroy(struct drm_encoder *encoder)
479{
480 drm_encoder_cleanup(encoder);
481}
482
483static struct drm_encoder_funcs sun4i_tv_funcs = {
484 .destroy = sun4i_tv_destroy,
485};
486
487static int sun4i_tv_comp_get_modes(struct drm_connector *connector)
488{
489 int i;
490
491 for (i = 0; i < ARRAY_SIZE(tv_modes); i++) {
492 struct drm_display_mode *mode;
493 const struct tv_mode *tv_mode = &tv_modes[i];
494
495 mode = drm_mode_create(connector->dev);
496 if (!mode) {
497 DRM_ERROR("Failed to create a new display mode\n");
498 return 0;
499 }
500
501 strcpy(mode->name, tv_mode->name);
502
503 sun4i_tv_mode_to_drm_mode(tv_mode, mode);
504 drm_mode_probed_add(connector, mode);
505 }
506
507 return i;
508}
509
510static int sun4i_tv_comp_mode_valid(struct drm_connector *connector,
511 struct drm_display_mode *mode)
512{
513 /* TODO */
514 return MODE_OK;
515}
516
517static struct drm_connector_helper_funcs sun4i_tv_comp_connector_helper_funcs = {
518 .get_modes = sun4i_tv_comp_get_modes,
519 .mode_valid = sun4i_tv_comp_mode_valid,
520};
521
522static void
523sun4i_tv_comp_connector_destroy(struct drm_connector *connector)
524{
525 drm_connector_cleanup(connector);
526}
527
528static const struct drm_connector_funcs sun4i_tv_comp_connector_funcs = {
529 .fill_modes = drm_helper_probe_single_connector_modes,
530 .destroy = sun4i_tv_comp_connector_destroy,
531 .reset = drm_atomic_helper_connector_reset,
532 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
533 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
534};
535
536static struct regmap_config sun4i_tv_regmap_config = {
537 .reg_bits = 32,
538 .val_bits = 32,
539 .reg_stride = 4,
540 .max_register = SUN4I_TVE_WSS_DATA2_REG,
541 .name = "tv-encoder",
542};
543
544static int sun4i_tv_bind(struct device *dev, struct device *master,
545 void *data)
546{
547 struct platform_device *pdev = to_platform_device(dev);
548 struct drm_device *drm = data;
549 struct sun4i_drv *drv = drm->dev_private;
550 struct sun4i_tv *tv;
551 struct resource *res;
552 void __iomem *regs;
553 int ret;
554
555 tv = devm_kzalloc(dev, sizeof(*tv), GFP_KERNEL);
556 if (!tv)
557 return -ENOMEM;
558 tv->drv = drv;
559 dev_set_drvdata(dev, tv);
560
561 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
562 regs = devm_ioremap_resource(dev, res);
563 if (IS_ERR(regs)) {
564 dev_err(dev, "Couldn't map the TV encoder registers\n");
565 return PTR_ERR(regs);
566 }
567
568 tv->regs = devm_regmap_init_mmio(dev, regs,
569 &sun4i_tv_regmap_config);
570 if (IS_ERR(tv->regs)) {
571 dev_err(dev, "Couldn't create the TV encoder regmap\n");
572 return PTR_ERR(tv->regs);
573 }
574
575 tv->reset = devm_reset_control_get(dev, NULL);
576 if (IS_ERR(tv->reset)) {
577 dev_err(dev, "Couldn't get our reset line\n");
578 return PTR_ERR(tv->reset);
579 }
580
581 ret = reset_control_deassert(tv->reset);
582 if (ret) {
583 dev_err(dev, "Couldn't deassert our reset line\n");
584 return ret;
585 }
586
587 tv->clk = devm_clk_get(dev, NULL);
588 if (IS_ERR(tv->clk)) {
589 dev_err(dev, "Couldn't get the TV encoder clock\n");
590 ret = PTR_ERR(tv->clk);
591 goto err_assert_reset;
592 }
593 clk_prepare_enable(tv->clk);
594
595 drm_encoder_helper_add(&tv->encoder,
596 &sun4i_tv_helper_funcs);
597 ret = drm_encoder_init(drm,
598 &tv->encoder,
599 &sun4i_tv_funcs,
600 DRM_MODE_ENCODER_TVDAC,
601 NULL);
602 if (ret) {
603 dev_err(dev, "Couldn't initialise the TV encoder\n");
604 goto err_disable_clk;
605 }
606
607 tv->encoder.possible_crtcs = drm_of_find_possible_crtcs(drm,
608 dev->of_node);
609 if (!tv->encoder.possible_crtcs) {
610 ret = -EPROBE_DEFER;
611 goto err_disable_clk;
612 }
613
614 drm_connector_helper_add(&tv->connector,
615 &sun4i_tv_comp_connector_helper_funcs);
616 ret = drm_connector_init(drm, &tv->connector,
617 &sun4i_tv_comp_connector_funcs,
618 DRM_MODE_CONNECTOR_Composite);
619 if (ret) {
620 dev_err(dev,
621 "Couldn't initialise the Composite connector\n");
622 goto err_cleanup_connector;
623 }
624 tv->connector.interlace_allowed = true;
625
626 drm_mode_connector_attach_encoder(&tv->connector, &tv->encoder);
627
628 return 0;
629
630err_cleanup_connector:
631 drm_encoder_cleanup(&tv->encoder);
632err_disable_clk:
633 clk_disable_unprepare(tv->clk);
634err_assert_reset:
635 reset_control_assert(tv->reset);
636 return ret;
637}
638
639static void sun4i_tv_unbind(struct device *dev, struct device *master,
640 void *data)
641{
642 struct sun4i_tv *tv = dev_get_drvdata(dev);
643
644 drm_connector_cleanup(&tv->connector);
645 drm_encoder_cleanup(&tv->encoder);
646 clk_disable_unprepare(tv->clk);
647}
648
649static const struct component_ops sun4i_tv_ops = {
650 .bind = sun4i_tv_bind,
651 .unbind = sun4i_tv_unbind,
652};
653
654static int sun4i_tv_probe(struct platform_device *pdev)
655{
656 return component_add(&pdev->dev, &sun4i_tv_ops);
657}
658
659static int sun4i_tv_remove(struct platform_device *pdev)
660{
661 component_del(&pdev->dev, &sun4i_tv_ops);
662
663 return 0;
664}
665
666static const struct of_device_id sun4i_tv_of_table[] = {
667 { .compatible = "allwinner,sun4i-a10-tv-encoder" },
668 { }
669};
670MODULE_DEVICE_TABLE(of, sun4i_tv_of_table);
671
672static struct platform_driver sun4i_tv_platform_driver = {
673 .probe = sun4i_tv_probe,
674 .remove = sun4i_tv_remove,
675 .driver = {
676 .name = "sun4i-tve",
677 .of_match_table = sun4i_tv_of_table,
678 },
679};
680module_platform_driver(sun4i_tv_platform_driver);
681
682MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
683MODULE_DESCRIPTION("Allwinner A10 TV Encoder Driver");
684MODULE_LICENSE("GPL");