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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (C) 2015 Free Electrons
4 * Copyright (C) 2015 NextThing Co
5 *
6 * Maxime Ripard <maxime.ripard@free-electrons.com>
7 */
8
9#include <linux/clk.h>
10#include <linux/component.h>
11#include <linux/module.h>
12#include <linux/of_address.h>
13#include <linux/platform_device.h>
14#include <linux/regmap.h>
15#include <linux/reset.h>
16
17#include <drm/drm_atomic_helper.h>
18#include <drm/drm_of.h>
19#include <drm/drm_panel.h>
20#include <drm/drm_print.h>
21#include <drm/drm_probe_helper.h>
22#include <drm/drm_simple_kms_helper.h>
23
24#include "sun4i_crtc.h"
25#include "sun4i_drv.h"
26#include "sunxi_engine.h"
27
28#define SUN4I_TVE_EN_REG 0x000
29#define SUN4I_TVE_EN_DAC_MAP_MASK GENMASK(19, 4)
30#define SUN4I_TVE_EN_DAC_MAP(dac, out) (((out) & 0xf) << (dac + 1) * 4)
31#define SUN4I_TVE_EN_ENABLE BIT(0)
32
33#define SUN4I_TVE_CFG0_REG 0x004
34#define SUN4I_TVE_CFG0_DAC_CONTROL_54M BIT(26)
35#define SUN4I_TVE_CFG0_CORE_DATAPATH_54M BIT(25)
36#define SUN4I_TVE_CFG0_CORE_CONTROL_54M BIT(24)
37#define SUN4I_TVE_CFG0_YC_EN BIT(17)
38#define SUN4I_TVE_CFG0_COMP_EN BIT(16)
39#define SUN4I_TVE_CFG0_RES(x) ((x) & 0xf)
40#define SUN4I_TVE_CFG0_RES_480i SUN4I_TVE_CFG0_RES(0)
41#define SUN4I_TVE_CFG0_RES_576i SUN4I_TVE_CFG0_RES(1)
42
43#define SUN4I_TVE_DAC0_REG 0x008
44#define SUN4I_TVE_DAC0_CLOCK_INVERT BIT(24)
45#define SUN4I_TVE_DAC0_LUMA(x) (((x) & 3) << 20)
46#define SUN4I_TVE_DAC0_LUMA_0_4 SUN4I_TVE_DAC0_LUMA(3)
47#define SUN4I_TVE_DAC0_CHROMA(x) (((x) & 3) << 18)
48#define SUN4I_TVE_DAC0_CHROMA_0_75 SUN4I_TVE_DAC0_CHROMA(3)
49#define SUN4I_TVE_DAC0_INTERNAL_DAC(x) (((x) & 3) << 16)
50#define SUN4I_TVE_DAC0_INTERNAL_DAC_37_5_OHMS SUN4I_TVE_DAC0_INTERNAL_DAC(3)
51#define SUN4I_TVE_DAC0_DAC_EN(dac) BIT(dac)
52
53#define SUN4I_TVE_NOTCH_REG 0x00c
54#define SUN4I_TVE_NOTCH_DAC0_TO_DAC_DLY(dac, x) ((4 - (x)) << (dac * 3))
55
56#define SUN4I_TVE_CHROMA_FREQ_REG 0x010
57
58#define SUN4I_TVE_PORCH_REG 0x014
59#define SUN4I_TVE_PORCH_BACK(x) ((x) << 16)
60#define SUN4I_TVE_PORCH_FRONT(x) (x)
61
62#define SUN4I_TVE_LINE_REG 0x01c
63#define SUN4I_TVE_LINE_FIRST(x) ((x) << 16)
64#define SUN4I_TVE_LINE_NUMBER(x) (x)
65
66#define SUN4I_TVE_LEVEL_REG 0x020
67#define SUN4I_TVE_LEVEL_BLANK(x) ((x) << 16)
68#define SUN4I_TVE_LEVEL_BLACK(x) (x)
69
70#define SUN4I_TVE_DAC1_REG 0x024
71#define SUN4I_TVE_DAC1_AMPLITUDE(dac, x) ((x) << (dac * 8))
72
73#define SUN4I_TVE_DETECT_STA_REG 0x038
74#define SUN4I_TVE_DETECT_STA_DAC(dac) BIT((dac * 8))
75#define SUN4I_TVE_DETECT_STA_UNCONNECTED 0
76#define SUN4I_TVE_DETECT_STA_CONNECTED 1
77#define SUN4I_TVE_DETECT_STA_GROUND 2
78
79#define SUN4I_TVE_CB_CR_LVL_REG 0x10c
80#define SUN4I_TVE_CB_CR_LVL_CR_BURST(x) ((x) << 8)
81#define SUN4I_TVE_CB_CR_LVL_CB_BURST(x) (x)
82
83#define SUN4I_TVE_TINT_BURST_PHASE_REG 0x110
84#define SUN4I_TVE_TINT_BURST_PHASE_CHROMA(x) (x)
85
86#define SUN4I_TVE_BURST_WIDTH_REG 0x114
87#define SUN4I_TVE_BURST_WIDTH_BREEZEWAY(x) ((x) << 16)
88#define SUN4I_TVE_BURST_WIDTH_BURST_WIDTH(x) ((x) << 8)
89#define SUN4I_TVE_BURST_WIDTH_HSYNC_WIDTH(x) (x)
90
91#define SUN4I_TVE_CB_CR_GAIN_REG 0x118
92#define SUN4I_TVE_CB_CR_GAIN_CR(x) ((x) << 8)
93#define SUN4I_TVE_CB_CR_GAIN_CB(x) (x)
94
95#define SUN4I_TVE_SYNC_VBI_REG 0x11c
96#define SUN4I_TVE_SYNC_VBI_SYNC(x) ((x) << 16)
97#define SUN4I_TVE_SYNC_VBI_VBLANK(x) (x)
98
99#define SUN4I_TVE_ACTIVE_LINE_REG 0x124
100#define SUN4I_TVE_ACTIVE_LINE(x) (x)
101
102#define SUN4I_TVE_CHROMA_REG 0x128
103#define SUN4I_TVE_CHROMA_COMP_GAIN(x) ((x) & 3)
104#define SUN4I_TVE_CHROMA_COMP_GAIN_50 SUN4I_TVE_CHROMA_COMP_GAIN(2)
105
106#define SUN4I_TVE_12C_REG 0x12c
107#define SUN4I_TVE_12C_NOTCH_WIDTH_WIDE BIT(8)
108#define SUN4I_TVE_12C_COMP_YUV_EN BIT(0)
109
110#define SUN4I_TVE_RESYNC_REG 0x130
111#define SUN4I_TVE_RESYNC_FIELD BIT(31)
112#define SUN4I_TVE_RESYNC_LINE(x) ((x) << 16)
113#define SUN4I_TVE_RESYNC_PIXEL(x) (x)
114
115#define SUN4I_TVE_SLAVE_REG 0x134
116
117#define SUN4I_TVE_WSS_DATA2_REG 0x244
118
119struct color_gains {
120 u16 cb;
121 u16 cr;
122};
123
124struct burst_levels {
125 u16 cb;
126 u16 cr;
127};
128
129struct video_levels {
130 u16 black;
131 u16 blank;
132};
133
134struct resync_parameters {
135 bool field;
136 u16 line;
137 u16 pixel;
138};
139
140struct tv_mode {
141 char *name;
142
143 u32 mode;
144 u32 chroma_freq;
145 u16 back_porch;
146 u16 front_porch;
147 u16 line_number;
148 u16 vblank_level;
149
150 u32 hdisplay;
151 u16 hfront_porch;
152 u16 hsync_len;
153 u16 hback_porch;
154
155 u32 vdisplay;
156 u16 vfront_porch;
157 u16 vsync_len;
158 u16 vback_porch;
159
160 bool yc_en;
161 bool dac3_en;
162 bool dac_bit25_en;
163
164 const struct color_gains *color_gains;
165 const struct burst_levels *burst_levels;
166 const struct video_levels *video_levels;
167 const struct resync_parameters *resync_params;
168};
169
170struct sun4i_tv {
171 struct drm_connector connector;
172 struct drm_encoder encoder;
173
174 struct clk *clk;
175 struct regmap *regs;
176 struct reset_control *reset;
177
178 struct sun4i_drv *drv;
179};
180
181static const struct video_levels ntsc_video_levels = {
182 .black = 282, .blank = 240,
183};
184
185static const struct video_levels pal_video_levels = {
186 .black = 252, .blank = 252,
187};
188
189static const struct burst_levels ntsc_burst_levels = {
190 .cb = 79, .cr = 0,
191};
192
193static const struct burst_levels pal_burst_levels = {
194 .cb = 40, .cr = 40,
195};
196
197static const struct color_gains ntsc_color_gains = {
198 .cb = 160, .cr = 160,
199};
200
201static const struct color_gains pal_color_gains = {
202 .cb = 224, .cr = 224,
203};
204
205static const struct resync_parameters ntsc_resync_parameters = {
206 .field = false, .line = 14, .pixel = 12,
207};
208
209static const struct resync_parameters pal_resync_parameters = {
210 .field = true, .line = 13, .pixel = 12,
211};
212
213static const struct tv_mode tv_modes[] = {
214 {
215 .name = "NTSC",
216 .mode = SUN4I_TVE_CFG0_RES_480i,
217 .chroma_freq = 0x21f07c1f,
218 .yc_en = true,
219 .dac3_en = true,
220 .dac_bit25_en = true,
221
222 .back_porch = 118,
223 .front_porch = 32,
224 .line_number = 525,
225
226 .hdisplay = 720,
227 .hfront_porch = 18,
228 .hsync_len = 2,
229 .hback_porch = 118,
230
231 .vdisplay = 480,
232 .vfront_porch = 26,
233 .vsync_len = 2,
234 .vback_porch = 17,
235
236 .vblank_level = 240,
237
238 .color_gains = &ntsc_color_gains,
239 .burst_levels = &ntsc_burst_levels,
240 .video_levels = &ntsc_video_levels,
241 .resync_params = &ntsc_resync_parameters,
242 },
243 {
244 .name = "PAL",
245 .mode = SUN4I_TVE_CFG0_RES_576i,
246 .chroma_freq = 0x2a098acb,
247
248 .back_porch = 138,
249 .front_porch = 24,
250 .line_number = 625,
251
252 .hdisplay = 720,
253 .hfront_porch = 3,
254 .hsync_len = 2,
255 .hback_porch = 139,
256
257 .vdisplay = 576,
258 .vfront_porch = 28,
259 .vsync_len = 2,
260 .vback_porch = 19,
261
262 .vblank_level = 252,
263
264 .color_gains = &pal_color_gains,
265 .burst_levels = &pal_burst_levels,
266 .video_levels = &pal_video_levels,
267 .resync_params = &pal_resync_parameters,
268 },
269};
270
271static inline struct sun4i_tv *
272drm_encoder_to_sun4i_tv(struct drm_encoder *encoder)
273{
274 return container_of(encoder, struct sun4i_tv,
275 encoder);
276}
277
278static inline struct sun4i_tv *
279drm_connector_to_sun4i_tv(struct drm_connector *connector)
280{
281 return container_of(connector, struct sun4i_tv,
282 connector);
283}
284
285/*
286 * FIXME: If only the drm_display_mode private field was usable, this
287 * could go away...
288 *
289 * So far, it doesn't seem to be preserved when the mode is passed by
290 * to mode_set for some reason.
291 */
292static const struct tv_mode *sun4i_tv_find_tv_by_mode(const struct drm_display_mode *mode)
293{
294 int i;
295
296 /* First try to identify the mode by name */
297 for (i = 0; i < ARRAY_SIZE(tv_modes); i++) {
298 const struct tv_mode *tv_mode = &tv_modes[i];
299
300 DRM_DEBUG_DRIVER("Comparing mode %s vs %s",
301 mode->name, tv_mode->name);
302
303 if (!strcmp(mode->name, tv_mode->name))
304 return tv_mode;
305 }
306
307 /* Then by number of lines */
308 for (i = 0; i < ARRAY_SIZE(tv_modes); i++) {
309 const struct tv_mode *tv_mode = &tv_modes[i];
310
311 DRM_DEBUG_DRIVER("Comparing mode %s vs %s (X: %d vs %d)",
312 mode->name, tv_mode->name,
313 mode->vdisplay, tv_mode->vdisplay);
314
315 if (mode->vdisplay == tv_mode->vdisplay)
316 return tv_mode;
317 }
318
319 return NULL;
320}
321
322static void sun4i_tv_mode_to_drm_mode(const struct tv_mode *tv_mode,
323 struct drm_display_mode *mode)
324{
325 DRM_DEBUG_DRIVER("Creating mode %s\n", mode->name);
326
327 mode->type = DRM_MODE_TYPE_DRIVER;
328 mode->clock = 13500;
329 mode->flags = DRM_MODE_FLAG_INTERLACE;
330
331 mode->hdisplay = tv_mode->hdisplay;
332 mode->hsync_start = mode->hdisplay + tv_mode->hfront_porch;
333 mode->hsync_end = mode->hsync_start + tv_mode->hsync_len;
334 mode->htotal = mode->hsync_end + tv_mode->hback_porch;
335
336 mode->vdisplay = tv_mode->vdisplay;
337 mode->vsync_start = mode->vdisplay + tv_mode->vfront_porch;
338 mode->vsync_end = mode->vsync_start + tv_mode->vsync_len;
339 mode->vtotal = mode->vsync_end + tv_mode->vback_porch;
340}
341
342static void sun4i_tv_disable(struct drm_encoder *encoder)
343{
344 struct sun4i_tv *tv = drm_encoder_to_sun4i_tv(encoder);
345 struct sun4i_crtc *crtc = drm_crtc_to_sun4i_crtc(encoder->crtc);
346
347 DRM_DEBUG_DRIVER("Disabling the TV Output\n");
348
349 regmap_update_bits(tv->regs, SUN4I_TVE_EN_REG,
350 SUN4I_TVE_EN_ENABLE,
351 0);
352
353 sunxi_engine_disable_color_correction(crtc->engine);
354}
355
356static void sun4i_tv_enable(struct drm_encoder *encoder)
357{
358 struct sun4i_tv *tv = drm_encoder_to_sun4i_tv(encoder);
359 struct sun4i_crtc *crtc = drm_crtc_to_sun4i_crtc(encoder->crtc);
360
361 DRM_DEBUG_DRIVER("Enabling the TV Output\n");
362
363 sunxi_engine_apply_color_correction(crtc->engine);
364
365 regmap_update_bits(tv->regs, SUN4I_TVE_EN_REG,
366 SUN4I_TVE_EN_ENABLE,
367 SUN4I_TVE_EN_ENABLE);
368}
369
370static void sun4i_tv_mode_set(struct drm_encoder *encoder,
371 struct drm_display_mode *mode,
372 struct drm_display_mode *adjusted_mode)
373{
374 struct sun4i_tv *tv = drm_encoder_to_sun4i_tv(encoder);
375 const struct tv_mode *tv_mode = sun4i_tv_find_tv_by_mode(mode);
376
377 /* Enable and map the DAC to the output */
378 regmap_update_bits(tv->regs, SUN4I_TVE_EN_REG,
379 SUN4I_TVE_EN_DAC_MAP_MASK,
380 SUN4I_TVE_EN_DAC_MAP(0, 1) |
381 SUN4I_TVE_EN_DAC_MAP(1, 2) |
382 SUN4I_TVE_EN_DAC_MAP(2, 3) |
383 SUN4I_TVE_EN_DAC_MAP(3, 4));
384
385 /* Set PAL settings */
386 regmap_write(tv->regs, SUN4I_TVE_CFG0_REG,
387 tv_mode->mode |
388 (tv_mode->yc_en ? SUN4I_TVE_CFG0_YC_EN : 0) |
389 SUN4I_TVE_CFG0_COMP_EN |
390 SUN4I_TVE_CFG0_DAC_CONTROL_54M |
391 SUN4I_TVE_CFG0_CORE_DATAPATH_54M |
392 SUN4I_TVE_CFG0_CORE_CONTROL_54M);
393
394 /* Configure the DAC for a composite output */
395 regmap_write(tv->regs, SUN4I_TVE_DAC0_REG,
396 SUN4I_TVE_DAC0_DAC_EN(0) |
397 (tv_mode->dac3_en ? SUN4I_TVE_DAC0_DAC_EN(3) : 0) |
398 SUN4I_TVE_DAC0_INTERNAL_DAC_37_5_OHMS |
399 SUN4I_TVE_DAC0_CHROMA_0_75 |
400 SUN4I_TVE_DAC0_LUMA_0_4 |
401 SUN4I_TVE_DAC0_CLOCK_INVERT |
402 (tv_mode->dac_bit25_en ? BIT(25) : 0) |
403 BIT(30));
404
405 /* Configure the sample delay between DAC0 and the other DAC */
406 regmap_write(tv->regs, SUN4I_TVE_NOTCH_REG,
407 SUN4I_TVE_NOTCH_DAC0_TO_DAC_DLY(1, 0) |
408 SUN4I_TVE_NOTCH_DAC0_TO_DAC_DLY(2, 0));
409
410 regmap_write(tv->regs, SUN4I_TVE_CHROMA_FREQ_REG,
411 tv_mode->chroma_freq);
412
413 /* Set the front and back porch */
414 regmap_write(tv->regs, SUN4I_TVE_PORCH_REG,
415 SUN4I_TVE_PORCH_BACK(tv_mode->back_porch) |
416 SUN4I_TVE_PORCH_FRONT(tv_mode->front_porch));
417
418 /* Set the lines setup */
419 regmap_write(tv->regs, SUN4I_TVE_LINE_REG,
420 SUN4I_TVE_LINE_FIRST(22) |
421 SUN4I_TVE_LINE_NUMBER(tv_mode->line_number));
422
423 regmap_write(tv->regs, SUN4I_TVE_LEVEL_REG,
424 SUN4I_TVE_LEVEL_BLANK(tv_mode->video_levels->blank) |
425 SUN4I_TVE_LEVEL_BLACK(tv_mode->video_levels->black));
426
427 regmap_write(tv->regs, SUN4I_TVE_DAC1_REG,
428 SUN4I_TVE_DAC1_AMPLITUDE(0, 0x18) |
429 SUN4I_TVE_DAC1_AMPLITUDE(1, 0x18) |
430 SUN4I_TVE_DAC1_AMPLITUDE(2, 0x18) |
431 SUN4I_TVE_DAC1_AMPLITUDE(3, 0x18));
432
433 regmap_write(tv->regs, SUN4I_TVE_CB_CR_LVL_REG,
434 SUN4I_TVE_CB_CR_LVL_CB_BURST(tv_mode->burst_levels->cb) |
435 SUN4I_TVE_CB_CR_LVL_CR_BURST(tv_mode->burst_levels->cr));
436
437 /* Set burst width for a composite output */
438 regmap_write(tv->regs, SUN4I_TVE_BURST_WIDTH_REG,
439 SUN4I_TVE_BURST_WIDTH_HSYNC_WIDTH(126) |
440 SUN4I_TVE_BURST_WIDTH_BURST_WIDTH(68) |
441 SUN4I_TVE_BURST_WIDTH_BREEZEWAY(22));
442
443 regmap_write(tv->regs, SUN4I_TVE_CB_CR_GAIN_REG,
444 SUN4I_TVE_CB_CR_GAIN_CB(tv_mode->color_gains->cb) |
445 SUN4I_TVE_CB_CR_GAIN_CR(tv_mode->color_gains->cr));
446
447 regmap_write(tv->regs, SUN4I_TVE_SYNC_VBI_REG,
448 SUN4I_TVE_SYNC_VBI_SYNC(0x10) |
449 SUN4I_TVE_SYNC_VBI_VBLANK(tv_mode->vblank_level));
450
451 regmap_write(tv->regs, SUN4I_TVE_ACTIVE_LINE_REG,
452 SUN4I_TVE_ACTIVE_LINE(1440));
453
454 /* Set composite chroma gain to 50 % */
455 regmap_write(tv->regs, SUN4I_TVE_CHROMA_REG,
456 SUN4I_TVE_CHROMA_COMP_GAIN_50);
457
458 regmap_write(tv->regs, SUN4I_TVE_12C_REG,
459 SUN4I_TVE_12C_COMP_YUV_EN |
460 SUN4I_TVE_12C_NOTCH_WIDTH_WIDE);
461
462 regmap_write(tv->regs, SUN4I_TVE_RESYNC_REG,
463 SUN4I_TVE_RESYNC_PIXEL(tv_mode->resync_params->pixel) |
464 SUN4I_TVE_RESYNC_LINE(tv_mode->resync_params->line) |
465 (tv_mode->resync_params->field ?
466 SUN4I_TVE_RESYNC_FIELD : 0));
467
468 regmap_write(tv->regs, SUN4I_TVE_SLAVE_REG, 0);
469}
470
471static const struct drm_encoder_helper_funcs sun4i_tv_helper_funcs = {
472 .disable = sun4i_tv_disable,
473 .enable = sun4i_tv_enable,
474 .mode_set = sun4i_tv_mode_set,
475};
476
477static int sun4i_tv_comp_get_modes(struct drm_connector *connector)
478{
479 int i;
480
481 for (i = 0; i < ARRAY_SIZE(tv_modes); i++) {
482 struct drm_display_mode *mode;
483 const struct tv_mode *tv_mode = &tv_modes[i];
484
485 mode = drm_mode_create(connector->dev);
486 if (!mode) {
487 DRM_ERROR("Failed to create a new display mode\n");
488 return 0;
489 }
490
491 strcpy(mode->name, tv_mode->name);
492
493 sun4i_tv_mode_to_drm_mode(tv_mode, mode);
494 drm_mode_probed_add(connector, mode);
495 }
496
497 return i;
498}
499
500static int sun4i_tv_comp_mode_valid(struct drm_connector *connector,
501 struct drm_display_mode *mode)
502{
503 /* TODO */
504 return MODE_OK;
505}
506
507static const struct drm_connector_helper_funcs sun4i_tv_comp_connector_helper_funcs = {
508 .get_modes = sun4i_tv_comp_get_modes,
509 .mode_valid = sun4i_tv_comp_mode_valid,
510};
511
512static void
513sun4i_tv_comp_connector_destroy(struct drm_connector *connector)
514{
515 drm_connector_cleanup(connector);
516}
517
518static const struct drm_connector_funcs sun4i_tv_comp_connector_funcs = {
519 .fill_modes = drm_helper_probe_single_connector_modes,
520 .destroy = sun4i_tv_comp_connector_destroy,
521 .reset = drm_atomic_helper_connector_reset,
522 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
523 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
524};
525
526static const struct regmap_config sun4i_tv_regmap_config = {
527 .reg_bits = 32,
528 .val_bits = 32,
529 .reg_stride = 4,
530 .max_register = SUN4I_TVE_WSS_DATA2_REG,
531 .name = "tv-encoder",
532};
533
534static int sun4i_tv_bind(struct device *dev, struct device *master,
535 void *data)
536{
537 struct platform_device *pdev = to_platform_device(dev);
538 struct drm_device *drm = data;
539 struct sun4i_drv *drv = drm->dev_private;
540 struct sun4i_tv *tv;
541 struct resource *res;
542 void __iomem *regs;
543 int ret;
544
545 tv = devm_kzalloc(dev, sizeof(*tv), GFP_KERNEL);
546 if (!tv)
547 return -ENOMEM;
548 tv->drv = drv;
549 dev_set_drvdata(dev, tv);
550
551 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
552 regs = devm_ioremap_resource(dev, res);
553 if (IS_ERR(regs)) {
554 dev_err(dev, "Couldn't map the TV encoder registers\n");
555 return PTR_ERR(regs);
556 }
557
558 tv->regs = devm_regmap_init_mmio(dev, regs,
559 &sun4i_tv_regmap_config);
560 if (IS_ERR(tv->regs)) {
561 dev_err(dev, "Couldn't create the TV encoder regmap\n");
562 return PTR_ERR(tv->regs);
563 }
564
565 tv->reset = devm_reset_control_get(dev, NULL);
566 if (IS_ERR(tv->reset)) {
567 dev_err(dev, "Couldn't get our reset line\n");
568 return PTR_ERR(tv->reset);
569 }
570
571 ret = reset_control_deassert(tv->reset);
572 if (ret) {
573 dev_err(dev, "Couldn't deassert our reset line\n");
574 return ret;
575 }
576
577 tv->clk = devm_clk_get(dev, NULL);
578 if (IS_ERR(tv->clk)) {
579 dev_err(dev, "Couldn't get the TV encoder clock\n");
580 ret = PTR_ERR(tv->clk);
581 goto err_assert_reset;
582 }
583 clk_prepare_enable(tv->clk);
584
585 drm_encoder_helper_add(&tv->encoder,
586 &sun4i_tv_helper_funcs);
587 ret = drm_simple_encoder_init(drm, &tv->encoder,
588 DRM_MODE_ENCODER_TVDAC);
589 if (ret) {
590 dev_err(dev, "Couldn't initialise the TV encoder\n");
591 goto err_disable_clk;
592 }
593
594 tv->encoder.possible_crtcs = drm_of_find_possible_crtcs(drm,
595 dev->of_node);
596 if (!tv->encoder.possible_crtcs) {
597 ret = -EPROBE_DEFER;
598 goto err_disable_clk;
599 }
600
601 drm_connector_helper_add(&tv->connector,
602 &sun4i_tv_comp_connector_helper_funcs);
603 ret = drm_connector_init(drm, &tv->connector,
604 &sun4i_tv_comp_connector_funcs,
605 DRM_MODE_CONNECTOR_Composite);
606 if (ret) {
607 dev_err(dev,
608 "Couldn't initialise the Composite connector\n");
609 goto err_cleanup_connector;
610 }
611 tv->connector.interlace_allowed = true;
612
613 drm_connector_attach_encoder(&tv->connector, &tv->encoder);
614
615 return 0;
616
617err_cleanup_connector:
618 drm_encoder_cleanup(&tv->encoder);
619err_disable_clk:
620 clk_disable_unprepare(tv->clk);
621err_assert_reset:
622 reset_control_assert(tv->reset);
623 return ret;
624}
625
626static void sun4i_tv_unbind(struct device *dev, struct device *master,
627 void *data)
628{
629 struct sun4i_tv *tv = dev_get_drvdata(dev);
630
631 drm_connector_cleanup(&tv->connector);
632 drm_encoder_cleanup(&tv->encoder);
633 clk_disable_unprepare(tv->clk);
634}
635
636static const struct component_ops sun4i_tv_ops = {
637 .bind = sun4i_tv_bind,
638 .unbind = sun4i_tv_unbind,
639};
640
641static int sun4i_tv_probe(struct platform_device *pdev)
642{
643 return component_add(&pdev->dev, &sun4i_tv_ops);
644}
645
646static int sun4i_tv_remove(struct platform_device *pdev)
647{
648 component_del(&pdev->dev, &sun4i_tv_ops);
649
650 return 0;
651}
652
653static const struct of_device_id sun4i_tv_of_table[] = {
654 { .compatible = "allwinner,sun4i-a10-tv-encoder" },
655 { }
656};
657MODULE_DEVICE_TABLE(of, sun4i_tv_of_table);
658
659static struct platform_driver sun4i_tv_platform_driver = {
660 .probe = sun4i_tv_probe,
661 .remove = sun4i_tv_remove,
662 .driver = {
663 .name = "sun4i-tve",
664 .of_match_table = sun4i_tv_of_table,
665 },
666};
667module_platform_driver(sun4i_tv_platform_driver);
668
669MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
670MODULE_DESCRIPTION("Allwinner A10 TV Encoder Driver");
671MODULE_LICENSE("GPL");