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 "sun4i_tcon.h"
28 #include "sunxi_engine.h"
29
30 #define SUN4I_TVE_EN_REG 0x000
31 #define SUN4I_TVE_EN_DAC_MAP_MASK GENMASK(19, 4)
32 #define SUN4I_TVE_EN_DAC_MAP(dac, out) (((out) & 0xf) << (dac + 1) * 4)
33 #define SUN4I_TVE_EN_ENABLE BIT(0)
34
35 #define SUN4I_TVE_CFG0_REG 0x004
36 #define SUN4I_TVE_CFG0_DAC_CONTROL_54M BIT(26)
37 #define SUN4I_TVE_CFG0_CORE_DATAPATH_54M BIT(25)
38 #define SUN4I_TVE_CFG0_CORE_CONTROL_54M BIT(24)
39 #define SUN4I_TVE_CFG0_YC_EN BIT(17)
40 #define SUN4I_TVE_CFG0_COMP_EN BIT(16)
41 #define SUN4I_TVE_CFG0_RES(x) ((x) & 0xf)
42 #define SUN4I_TVE_CFG0_RES_480i SUN4I_TVE_CFG0_RES(0)
43 #define SUN4I_TVE_CFG0_RES_576i SUN4I_TVE_CFG0_RES(1)
44
45 #define SUN4I_TVE_DAC0_REG 0x008
46 #define SUN4I_TVE_DAC0_CLOCK_INVERT BIT(24)
47 #define SUN4I_TVE_DAC0_LUMA(x) (((x) & 3) << 20)
48 #define SUN4I_TVE_DAC0_LUMA_0_4 SUN4I_TVE_DAC0_LUMA(3)
49 #define SUN4I_TVE_DAC0_CHROMA(x) (((x) & 3) << 18)
50 #define SUN4I_TVE_DAC0_CHROMA_0_75 SUN4I_TVE_DAC0_CHROMA(3)
51 #define SUN4I_TVE_DAC0_INTERNAL_DAC(x) (((x) & 3) << 16)
52 #define SUN4I_TVE_DAC0_INTERNAL_DAC_37_5_OHMS SUN4I_TVE_DAC0_INTERNAL_DAC(3)
53 #define SUN4I_TVE_DAC0_DAC_EN(dac) BIT(dac)
54
55 #define SUN4I_TVE_NOTCH_REG 0x00c
56 #define SUN4I_TVE_NOTCH_DAC0_TO_DAC_DLY(dac, x) ((4 - (x)) << (dac * 3))
57
58 #define SUN4I_TVE_CHROMA_FREQ_REG 0x010
59
60 #define SUN4I_TVE_PORCH_REG 0x014
61 #define SUN4I_TVE_PORCH_BACK(x) ((x) << 16)
62 #define SUN4I_TVE_PORCH_FRONT(x) (x)
63
64 #define SUN4I_TVE_LINE_REG 0x01c
65 #define SUN4I_TVE_LINE_FIRST(x) ((x) << 16)
66 #define SUN4I_TVE_LINE_NUMBER(x) (x)
67
68 #define SUN4I_TVE_LEVEL_REG 0x020
69 #define SUN4I_TVE_LEVEL_BLANK(x) ((x) << 16)
70 #define SUN4I_TVE_LEVEL_BLACK(x) (x)
71
72 #define SUN4I_TVE_DAC1_REG 0x024
73 #define SUN4I_TVE_DAC1_AMPLITUDE(dac, x) ((x) << (dac * 8))
74
75 #define SUN4I_TVE_DETECT_STA_REG 0x038
76 #define SUN4I_TVE_DETECT_STA_DAC(dac) BIT((dac * 8))
77 #define SUN4I_TVE_DETECT_STA_UNCONNECTED 0
78 #define SUN4I_TVE_DETECT_STA_CONNECTED 1
79 #define SUN4I_TVE_DETECT_STA_GROUND 2
80
81 #define SUN4I_TVE_CB_CR_LVL_REG 0x10c
82 #define SUN4I_TVE_CB_CR_LVL_CR_BURST(x) ((x) << 8)
83 #define SUN4I_TVE_CB_CR_LVL_CB_BURST(x) (x)
84
85 #define SUN4I_TVE_TINT_BURST_PHASE_REG 0x110
86 #define SUN4I_TVE_TINT_BURST_PHASE_CHROMA(x) (x)
87
88 #define SUN4I_TVE_BURST_WIDTH_REG 0x114
89 #define SUN4I_TVE_BURST_WIDTH_BREEZEWAY(x) ((x) << 16)
90 #define SUN4I_TVE_BURST_WIDTH_BURST_WIDTH(x) ((x) << 8)
91 #define SUN4I_TVE_BURST_WIDTH_HSYNC_WIDTH(x) (x)
92
93 #define SUN4I_TVE_CB_CR_GAIN_REG 0x118
94 #define SUN4I_TVE_CB_CR_GAIN_CR(x) ((x) << 8)
95 #define SUN4I_TVE_CB_CR_GAIN_CB(x) (x)
96
97 #define SUN4I_TVE_SYNC_VBI_REG 0x11c
98 #define SUN4I_TVE_SYNC_VBI_SYNC(x) ((x) << 16)
99 #define SUN4I_TVE_SYNC_VBI_VBLANK(x) (x)
100
101 #define SUN4I_TVE_ACTIVE_LINE_REG 0x124
102 #define SUN4I_TVE_ACTIVE_LINE(x) (x)
103
104 #define SUN4I_TVE_CHROMA_REG 0x128
105 #define SUN4I_TVE_CHROMA_COMP_GAIN(x) ((x) & 3)
106 #define SUN4I_TVE_CHROMA_COMP_GAIN_50 SUN4I_TVE_CHROMA_COMP_GAIN(2)
107
108 #define SUN4I_TVE_12C_REG 0x12c
109 #define SUN4I_TVE_12C_NOTCH_WIDTH_WIDE BIT(8)
110 #define SUN4I_TVE_12C_COMP_YUV_EN BIT(0)
111
112 #define SUN4I_TVE_RESYNC_REG 0x130
113 #define SUN4I_TVE_RESYNC_FIELD BIT(31)
114 #define SUN4I_TVE_RESYNC_LINE(x) ((x) << 16)
115 #define SUN4I_TVE_RESYNC_PIXEL(x) (x)
116
117 #define SUN4I_TVE_SLAVE_REG 0x134
118
119 #define SUN4I_TVE_WSS_DATA2_REG 0x244
120
121 struct color_gains {
122 u16 cb;
123 u16 cr;
124 };
125
126 struct burst_levels {
127 u16 cb;
128 u16 cr;
129 };
130
131 struct video_levels {
132 u16 black;
133 u16 blank;
134 };
135
136 struct resync_parameters {
137 bool field;
138 u16 line;
139 u16 pixel;
140 };
141
142 struct tv_mode {
143 char *name;
144
145 u32 mode;
146 u32 chroma_freq;
147 u16 back_porch;
148 u16 front_porch;
149 u16 line_number;
150 u16 vblank_level;
151
152 u32 hdisplay;
153 u16 hfront_porch;
154 u16 hsync_len;
155 u16 hback_porch;
156
157 u32 vdisplay;
158 u16 vfront_porch;
159 u16 vsync_len;
160 u16 vback_porch;
161
162 bool yc_en;
163 bool dac3_en;
164 bool dac_bit25_en;
165
166 const struct color_gains *color_gains;
167 const struct burst_levels *burst_levels;
168 const struct video_levels *video_levels;
169 const struct resync_parameters *resync_params;
170 };
171
172 struct sun4i_tv {
173 struct drm_connector connector;
174 struct drm_encoder encoder;
175
176 struct clk *clk;
177 struct regmap *regs;
178 struct reset_control *reset;
179
180 struct sun4i_drv *drv;
181 };
182
183 static const struct video_levels ntsc_video_levels = {
184 .black = 282, .blank = 240,
185 };
186
187 static const struct video_levels pal_video_levels = {
188 .black = 252, .blank = 252,
189 };
190
191 static const struct burst_levels ntsc_burst_levels = {
192 .cb = 79, .cr = 0,
193 };
194
195 static const struct burst_levels pal_burst_levels = {
196 .cb = 40, .cr = 40,
197 };
198
199 static const struct color_gains ntsc_color_gains = {
200 .cb = 160, .cr = 160,
201 };
202
203 static const struct color_gains pal_color_gains = {
204 .cb = 224, .cr = 224,
205 };
206
207 static const struct resync_parameters ntsc_resync_parameters = {
208 .field = false, .line = 14, .pixel = 12,
209 };
210
211 static const struct resync_parameters pal_resync_parameters = {
212 .field = true, .line = 13, .pixel = 12,
213 };
214
215 static const struct tv_mode tv_modes[] = {
216 {
217 .name = "NTSC",
218 .mode = SUN4I_TVE_CFG0_RES_480i,
219 .chroma_freq = 0x21f07c1f,
220 .yc_en = true,
221 .dac3_en = true,
222 .dac_bit25_en = true,
223
224 .back_porch = 118,
225 .front_porch = 32,
226 .line_number = 525,
227
228 .hdisplay = 720,
229 .hfront_porch = 18,
230 .hsync_len = 2,
231 .hback_porch = 118,
232
233 .vdisplay = 480,
234 .vfront_porch = 26,
235 .vsync_len = 2,
236 .vback_porch = 17,
237
238 .vblank_level = 240,
239
240 .color_gains = &ntsc_color_gains,
241 .burst_levels = &ntsc_burst_levels,
242 .video_levels = &ntsc_video_levels,
243 .resync_params = &ntsc_resync_parameters,
244 },
245 {
246 .name = "PAL",
247 .mode = SUN4I_TVE_CFG0_RES_576i,
248 .chroma_freq = 0x2a098acb,
249
250 .back_porch = 138,
251 .front_porch = 24,
252 .line_number = 625,
253
254 .hdisplay = 720,
255 .hfront_porch = 3,
256 .hsync_len = 2,
257 .hback_porch = 139,
258
259 .vdisplay = 576,
260 .vfront_porch = 28,
261 .vsync_len = 2,
262 .vback_porch = 19,
263
264 .vblank_level = 252,
265
266 .color_gains = &pal_color_gains,
267 .burst_levels = &pal_burst_levels,
268 .video_levels = &pal_video_levels,
269 .resync_params = &pal_resync_parameters,
270 },
271 };
272
273 static inline struct sun4i_tv *
drm_encoder_to_sun4i_tv(struct drm_encoder * encoder)274 drm_encoder_to_sun4i_tv(struct drm_encoder *encoder)
275 {
276 return container_of(encoder, struct sun4i_tv,
277 encoder);
278 }
279
280 static inline struct sun4i_tv *
drm_connector_to_sun4i_tv(struct drm_connector * connector)281 drm_connector_to_sun4i_tv(struct drm_connector *connector)
282 {
283 return container_of(connector, struct sun4i_tv,
284 connector);
285 }
286
287 /*
288 * FIXME: If only the drm_display_mode private field was usable, this
289 * could go away...
290 *
291 * So far, it doesn't seem to be preserved when the mode is passed by
292 * to mode_set for some reason.
293 */
sun4i_tv_find_tv_by_mode(const struct drm_display_mode * mode)294 static const struct tv_mode *sun4i_tv_find_tv_by_mode(const struct drm_display_mode *mode)
295 {
296 int i;
297
298 /* First try to identify the mode by name */
299 for (i = 0; i < ARRAY_SIZE(tv_modes); i++) {
300 const struct tv_mode *tv_mode = &tv_modes[i];
301
302 DRM_DEBUG_DRIVER("Comparing mode %s vs %s",
303 mode->name, tv_mode->name);
304
305 if (!strcmp(mode->name, tv_mode->name))
306 return tv_mode;
307 }
308
309 /* Then by number of lines */
310 for (i = 0; i < ARRAY_SIZE(tv_modes); i++) {
311 const struct tv_mode *tv_mode = &tv_modes[i];
312
313 DRM_DEBUG_DRIVER("Comparing mode %s vs %s (X: %d vs %d)",
314 mode->name, tv_mode->name,
315 mode->vdisplay, tv_mode->vdisplay);
316
317 if (mode->vdisplay == tv_mode->vdisplay)
318 return tv_mode;
319 }
320
321 return NULL;
322 }
323
sun4i_tv_mode_to_drm_mode(const struct tv_mode * tv_mode,struct drm_display_mode * mode)324 static void sun4i_tv_mode_to_drm_mode(const struct tv_mode *tv_mode,
325 struct drm_display_mode *mode)
326 {
327 DRM_DEBUG_DRIVER("Creating mode %s\n", mode->name);
328
329 mode->type = DRM_MODE_TYPE_DRIVER;
330 mode->clock = 13500;
331 mode->flags = DRM_MODE_FLAG_INTERLACE;
332
333 mode->hdisplay = tv_mode->hdisplay;
334 mode->hsync_start = mode->hdisplay + tv_mode->hfront_porch;
335 mode->hsync_end = mode->hsync_start + tv_mode->hsync_len;
336 mode->htotal = mode->hsync_end + tv_mode->hback_porch;
337
338 mode->vdisplay = tv_mode->vdisplay;
339 mode->vsync_start = mode->vdisplay + tv_mode->vfront_porch;
340 mode->vsync_end = mode->vsync_start + tv_mode->vsync_len;
341 mode->vtotal = mode->vsync_end + tv_mode->vback_porch;
342 }
343
sun4i_tv_disable(struct drm_encoder * encoder)344 static void sun4i_tv_disable(struct drm_encoder *encoder)
345 {
346 struct sun4i_tv *tv = drm_encoder_to_sun4i_tv(encoder);
347 struct sun4i_crtc *crtc = drm_crtc_to_sun4i_crtc(encoder->crtc);
348 struct sun4i_tcon *tcon = crtc->tcon;
349
350 DRM_DEBUG_DRIVER("Disabling the TV Output\n");
351
352 sun4i_tcon_channel_disable(tcon, 1);
353
354 regmap_update_bits(tv->regs, SUN4I_TVE_EN_REG,
355 SUN4I_TVE_EN_ENABLE,
356 0);
357
358 sunxi_engine_disable_color_correction(crtc->engine);
359 }
360
sun4i_tv_enable(struct drm_encoder * encoder)361 static void sun4i_tv_enable(struct drm_encoder *encoder)
362 {
363 struct sun4i_tv *tv = drm_encoder_to_sun4i_tv(encoder);
364 struct sun4i_crtc *crtc = drm_crtc_to_sun4i_crtc(encoder->crtc);
365 struct sun4i_tcon *tcon = crtc->tcon;
366
367 DRM_DEBUG_DRIVER("Enabling the TV Output\n");
368
369 sunxi_engine_apply_color_correction(crtc->engine);
370
371 regmap_update_bits(tv->regs, SUN4I_TVE_EN_REG,
372 SUN4I_TVE_EN_ENABLE,
373 SUN4I_TVE_EN_ENABLE);
374
375 sun4i_tcon_channel_enable(tcon, 1);
376 }
377
sun4i_tv_mode_set(struct drm_encoder * encoder,struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)378 static void sun4i_tv_mode_set(struct drm_encoder *encoder,
379 struct drm_display_mode *mode,
380 struct drm_display_mode *adjusted_mode)
381 {
382 struct sun4i_tv *tv = drm_encoder_to_sun4i_tv(encoder);
383 struct sun4i_crtc *crtc = drm_crtc_to_sun4i_crtc(encoder->crtc);
384 struct sun4i_tcon *tcon = crtc->tcon;
385 const struct tv_mode *tv_mode = sun4i_tv_find_tv_by_mode(mode);
386
387 sun4i_tcon1_mode_set(tcon, mode);
388 sun4i_tcon_set_mux(tcon, 1, encoder);
389
390 /* Enable and map the DAC to the output */
391 regmap_update_bits(tv->regs, SUN4I_TVE_EN_REG,
392 SUN4I_TVE_EN_DAC_MAP_MASK,
393 SUN4I_TVE_EN_DAC_MAP(0, 1) |
394 SUN4I_TVE_EN_DAC_MAP(1, 2) |
395 SUN4I_TVE_EN_DAC_MAP(2, 3) |
396 SUN4I_TVE_EN_DAC_MAP(3, 4));
397
398 /* Set PAL settings */
399 regmap_write(tv->regs, SUN4I_TVE_CFG0_REG,
400 tv_mode->mode |
401 (tv_mode->yc_en ? SUN4I_TVE_CFG0_YC_EN : 0) |
402 SUN4I_TVE_CFG0_COMP_EN |
403 SUN4I_TVE_CFG0_DAC_CONTROL_54M |
404 SUN4I_TVE_CFG0_CORE_DATAPATH_54M |
405 SUN4I_TVE_CFG0_CORE_CONTROL_54M);
406
407 /* Configure the DAC for a composite output */
408 regmap_write(tv->regs, SUN4I_TVE_DAC0_REG,
409 SUN4I_TVE_DAC0_DAC_EN(0) |
410 (tv_mode->dac3_en ? SUN4I_TVE_DAC0_DAC_EN(3) : 0) |
411 SUN4I_TVE_DAC0_INTERNAL_DAC_37_5_OHMS |
412 SUN4I_TVE_DAC0_CHROMA_0_75 |
413 SUN4I_TVE_DAC0_LUMA_0_4 |
414 SUN4I_TVE_DAC0_CLOCK_INVERT |
415 (tv_mode->dac_bit25_en ? BIT(25) : 0) |
416 BIT(30));
417
418 /* Configure the sample delay between DAC0 and the other DAC */
419 regmap_write(tv->regs, SUN4I_TVE_NOTCH_REG,
420 SUN4I_TVE_NOTCH_DAC0_TO_DAC_DLY(1, 0) |
421 SUN4I_TVE_NOTCH_DAC0_TO_DAC_DLY(2, 0));
422
423 regmap_write(tv->regs, SUN4I_TVE_CHROMA_FREQ_REG,
424 tv_mode->chroma_freq);
425
426 /* Set the front and back porch */
427 regmap_write(tv->regs, SUN4I_TVE_PORCH_REG,
428 SUN4I_TVE_PORCH_BACK(tv_mode->back_porch) |
429 SUN4I_TVE_PORCH_FRONT(tv_mode->front_porch));
430
431 /* Set the lines setup */
432 regmap_write(tv->regs, SUN4I_TVE_LINE_REG,
433 SUN4I_TVE_LINE_FIRST(22) |
434 SUN4I_TVE_LINE_NUMBER(tv_mode->line_number));
435
436 regmap_write(tv->regs, SUN4I_TVE_LEVEL_REG,
437 SUN4I_TVE_LEVEL_BLANK(tv_mode->video_levels->blank) |
438 SUN4I_TVE_LEVEL_BLACK(tv_mode->video_levels->black));
439
440 regmap_write(tv->regs, SUN4I_TVE_DAC1_REG,
441 SUN4I_TVE_DAC1_AMPLITUDE(0, 0x18) |
442 SUN4I_TVE_DAC1_AMPLITUDE(1, 0x18) |
443 SUN4I_TVE_DAC1_AMPLITUDE(2, 0x18) |
444 SUN4I_TVE_DAC1_AMPLITUDE(3, 0x18));
445
446 regmap_write(tv->regs, SUN4I_TVE_CB_CR_LVL_REG,
447 SUN4I_TVE_CB_CR_LVL_CB_BURST(tv_mode->burst_levels->cb) |
448 SUN4I_TVE_CB_CR_LVL_CR_BURST(tv_mode->burst_levels->cr));
449
450 /* Set burst width for a composite output */
451 regmap_write(tv->regs, SUN4I_TVE_BURST_WIDTH_REG,
452 SUN4I_TVE_BURST_WIDTH_HSYNC_WIDTH(126) |
453 SUN4I_TVE_BURST_WIDTH_BURST_WIDTH(68) |
454 SUN4I_TVE_BURST_WIDTH_BREEZEWAY(22));
455
456 regmap_write(tv->regs, SUN4I_TVE_CB_CR_GAIN_REG,
457 SUN4I_TVE_CB_CR_GAIN_CB(tv_mode->color_gains->cb) |
458 SUN4I_TVE_CB_CR_GAIN_CR(tv_mode->color_gains->cr));
459
460 regmap_write(tv->regs, SUN4I_TVE_SYNC_VBI_REG,
461 SUN4I_TVE_SYNC_VBI_SYNC(0x10) |
462 SUN4I_TVE_SYNC_VBI_VBLANK(tv_mode->vblank_level));
463
464 regmap_write(tv->regs, SUN4I_TVE_ACTIVE_LINE_REG,
465 SUN4I_TVE_ACTIVE_LINE(1440));
466
467 /* Set composite chroma gain to 50 % */
468 regmap_write(tv->regs, SUN4I_TVE_CHROMA_REG,
469 SUN4I_TVE_CHROMA_COMP_GAIN_50);
470
471 regmap_write(tv->regs, SUN4I_TVE_12C_REG,
472 SUN4I_TVE_12C_COMP_YUV_EN |
473 SUN4I_TVE_12C_NOTCH_WIDTH_WIDE);
474
475 regmap_write(tv->regs, SUN4I_TVE_RESYNC_REG,
476 SUN4I_TVE_RESYNC_PIXEL(tv_mode->resync_params->pixel) |
477 SUN4I_TVE_RESYNC_LINE(tv_mode->resync_params->line) |
478 (tv_mode->resync_params->field ?
479 SUN4I_TVE_RESYNC_FIELD : 0));
480
481 regmap_write(tv->regs, SUN4I_TVE_SLAVE_REG, 0);
482 }
483
484 static struct drm_encoder_helper_funcs sun4i_tv_helper_funcs = {
485 .disable = sun4i_tv_disable,
486 .enable = sun4i_tv_enable,
487 .mode_set = sun4i_tv_mode_set,
488 };
489
sun4i_tv_destroy(struct drm_encoder * encoder)490 static void sun4i_tv_destroy(struct drm_encoder *encoder)
491 {
492 drm_encoder_cleanup(encoder);
493 }
494
495 static struct drm_encoder_funcs sun4i_tv_funcs = {
496 .destroy = sun4i_tv_destroy,
497 };
498
sun4i_tv_comp_get_modes(struct drm_connector * connector)499 static int sun4i_tv_comp_get_modes(struct drm_connector *connector)
500 {
501 int i;
502
503 for (i = 0; i < ARRAY_SIZE(tv_modes); i++) {
504 struct drm_display_mode *mode;
505 const struct tv_mode *tv_mode = &tv_modes[i];
506
507 mode = drm_mode_create(connector->dev);
508 if (!mode) {
509 DRM_ERROR("Failed to create a new display mode\n");
510 return 0;
511 }
512
513 strcpy(mode->name, tv_mode->name);
514
515 sun4i_tv_mode_to_drm_mode(tv_mode, mode);
516 drm_mode_probed_add(connector, mode);
517 }
518
519 return i;
520 }
521
sun4i_tv_comp_mode_valid(struct drm_connector * connector,struct drm_display_mode * mode)522 static int sun4i_tv_comp_mode_valid(struct drm_connector *connector,
523 struct drm_display_mode *mode)
524 {
525 /* TODO */
526 return MODE_OK;
527 }
528
529 static struct drm_connector_helper_funcs sun4i_tv_comp_connector_helper_funcs = {
530 .get_modes = sun4i_tv_comp_get_modes,
531 .mode_valid = sun4i_tv_comp_mode_valid,
532 };
533
534 static void
sun4i_tv_comp_connector_destroy(struct drm_connector * connector)535 sun4i_tv_comp_connector_destroy(struct drm_connector *connector)
536 {
537 drm_connector_cleanup(connector);
538 }
539
540 static const struct drm_connector_funcs sun4i_tv_comp_connector_funcs = {
541 .fill_modes = drm_helper_probe_single_connector_modes,
542 .destroy = sun4i_tv_comp_connector_destroy,
543 .reset = drm_atomic_helper_connector_reset,
544 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
545 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
546 };
547
548 static struct regmap_config sun4i_tv_regmap_config = {
549 .reg_bits = 32,
550 .val_bits = 32,
551 .reg_stride = 4,
552 .max_register = SUN4I_TVE_WSS_DATA2_REG,
553 .name = "tv-encoder",
554 };
555
sun4i_tv_bind(struct device * dev,struct device * master,void * data)556 static int sun4i_tv_bind(struct device *dev, struct device *master,
557 void *data)
558 {
559 struct platform_device *pdev = to_platform_device(dev);
560 struct drm_device *drm = data;
561 struct sun4i_drv *drv = drm->dev_private;
562 struct sun4i_tv *tv;
563 struct resource *res;
564 void __iomem *regs;
565 int ret;
566
567 tv = devm_kzalloc(dev, sizeof(*tv), GFP_KERNEL);
568 if (!tv)
569 return -ENOMEM;
570 tv->drv = drv;
571 dev_set_drvdata(dev, tv);
572
573 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
574 regs = devm_ioremap_resource(dev, res);
575 if (IS_ERR(regs)) {
576 dev_err(dev, "Couldn't map the TV encoder registers\n");
577 return PTR_ERR(regs);
578 }
579
580 tv->regs = devm_regmap_init_mmio(dev, regs,
581 &sun4i_tv_regmap_config);
582 if (IS_ERR(tv->regs)) {
583 dev_err(dev, "Couldn't create the TV encoder regmap\n");
584 return PTR_ERR(tv->regs);
585 }
586
587 tv->reset = devm_reset_control_get(dev, NULL);
588 if (IS_ERR(tv->reset)) {
589 dev_err(dev, "Couldn't get our reset line\n");
590 return PTR_ERR(tv->reset);
591 }
592
593 ret = reset_control_deassert(tv->reset);
594 if (ret) {
595 dev_err(dev, "Couldn't deassert our reset line\n");
596 return ret;
597 }
598
599 tv->clk = devm_clk_get(dev, NULL);
600 if (IS_ERR(tv->clk)) {
601 dev_err(dev, "Couldn't get the TV encoder clock\n");
602 ret = PTR_ERR(tv->clk);
603 goto err_assert_reset;
604 }
605 clk_prepare_enable(tv->clk);
606
607 drm_encoder_helper_add(&tv->encoder,
608 &sun4i_tv_helper_funcs);
609 ret = drm_encoder_init(drm,
610 &tv->encoder,
611 &sun4i_tv_funcs,
612 DRM_MODE_ENCODER_TVDAC,
613 NULL);
614 if (ret) {
615 dev_err(dev, "Couldn't initialise the TV encoder\n");
616 goto err_disable_clk;
617 }
618
619 tv->encoder.possible_crtcs = drm_of_find_possible_crtcs(drm,
620 dev->of_node);
621 if (!tv->encoder.possible_crtcs) {
622 ret = -EPROBE_DEFER;
623 goto err_disable_clk;
624 }
625
626 drm_connector_helper_add(&tv->connector,
627 &sun4i_tv_comp_connector_helper_funcs);
628 ret = drm_connector_init(drm, &tv->connector,
629 &sun4i_tv_comp_connector_funcs,
630 DRM_MODE_CONNECTOR_Composite);
631 if (ret) {
632 dev_err(dev,
633 "Couldn't initialise the Composite connector\n");
634 goto err_cleanup_connector;
635 }
636 tv->connector.interlace_allowed = true;
637
638 drm_mode_connector_attach_encoder(&tv->connector, &tv->encoder);
639
640 return 0;
641
642 err_cleanup_connector:
643 drm_encoder_cleanup(&tv->encoder);
644 err_disable_clk:
645 clk_disable_unprepare(tv->clk);
646 err_assert_reset:
647 reset_control_assert(tv->reset);
648 return ret;
649 }
650
sun4i_tv_unbind(struct device * dev,struct device * master,void * data)651 static void sun4i_tv_unbind(struct device *dev, struct device *master,
652 void *data)
653 {
654 struct sun4i_tv *tv = dev_get_drvdata(dev);
655
656 drm_connector_cleanup(&tv->connector);
657 drm_encoder_cleanup(&tv->encoder);
658 clk_disable_unprepare(tv->clk);
659 }
660
661 static const struct component_ops sun4i_tv_ops = {
662 .bind = sun4i_tv_bind,
663 .unbind = sun4i_tv_unbind,
664 };
665
sun4i_tv_probe(struct platform_device * pdev)666 static int sun4i_tv_probe(struct platform_device *pdev)
667 {
668 return component_add(&pdev->dev, &sun4i_tv_ops);
669 }
670
sun4i_tv_remove(struct platform_device * pdev)671 static int sun4i_tv_remove(struct platform_device *pdev)
672 {
673 component_del(&pdev->dev, &sun4i_tv_ops);
674
675 return 0;
676 }
677
678 static const struct of_device_id sun4i_tv_of_table[] = {
679 { .compatible = "allwinner,sun4i-a10-tv-encoder" },
680 { }
681 };
682 MODULE_DEVICE_TABLE(of, sun4i_tv_of_table);
683
684 static struct platform_driver sun4i_tv_platform_driver = {
685 .probe = sun4i_tv_probe,
686 .remove = sun4i_tv_remove,
687 .driver = {
688 .name = "sun4i-tve",
689 .of_match_table = sun4i_tv_of_table,
690 },
691 };
692 module_platform_driver(sun4i_tv_platform_driver);
693
694 MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
695 MODULE_DESCRIPTION("Allwinner A10 TV Encoder Driver");
696 MODULE_LICENSE("GPL");
697