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fcbc51e5 PZ |
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 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, | |
18 | * MA 02110-1301, USA. | |
19 | */ | |
20 | ||
21 | #include <linux/clk.h> | |
22 | #include <linux/clk-provider.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/of_i2c.h> | |
25 | #include <linux/pinctrl/consumer.h> | |
26 | #include <linux/regmap.h> | |
27 | #include <linux/regulator/consumer.h> | |
28 | #include <linux/spinlock.h> | |
29 | #include <linux/videodev2.h> | |
30 | #include <drm/drmP.h> | |
31 | #include <drm/drm_fb_helper.h> | |
32 | #include <drm/drm_crtc_helper.h> | |
33 | ||
34 | #include "imx-drm.h" | |
35 | ||
36 | #define TVE_COM_CONF_REG 0x00 | |
37 | #define TVE_TVDAC0_CONT_REG 0x28 | |
38 | #define TVE_TVDAC1_CONT_REG 0x2c | |
39 | #define TVE_TVDAC2_CONT_REG 0x30 | |
40 | #define TVE_CD_CONT_REG 0x34 | |
41 | #define TVE_INT_CONT_REG 0x64 | |
42 | #define TVE_STAT_REG 0x68 | |
43 | #define TVE_TST_MODE_REG 0x6c | |
44 | #define TVE_MV_CONT_REG 0xdc | |
45 | ||
46 | /* TVE_COM_CONF_REG */ | |
47 | #define TVE_SYNC_CH_2_EN BIT(22) | |
48 | #define TVE_SYNC_CH_1_EN BIT(21) | |
49 | #define TVE_SYNC_CH_0_EN BIT(20) | |
50 | #define TVE_TV_OUT_MODE_MASK (0x7 << 12) | |
51 | #define TVE_TV_OUT_DISABLE (0x0 << 12) | |
52 | #define TVE_TV_OUT_CVBS_0 (0x1 << 12) | |
53 | #define TVE_TV_OUT_CVBS_2 (0x2 << 12) | |
54 | #define TVE_TV_OUT_CVBS_0_2 (0x3 << 12) | |
55 | #define TVE_TV_OUT_SVIDEO_0_1 (0x4 << 12) | |
56 | #define TVE_TV_OUT_SVIDEO_0_1_CVBS2_2 (0x5 << 12) | |
57 | #define TVE_TV_OUT_YPBPR (0x6 << 12) | |
58 | #define TVE_TV_OUT_RGB (0x7 << 12) | |
59 | #define TVE_TV_STAND_MASK (0xf << 8) | |
60 | #define TVE_TV_STAND_HD_1080P30 (0xc << 8) | |
61 | #define TVE_P2I_CONV_EN BIT(7) | |
62 | #define TVE_INP_VIDEO_FORM BIT(6) | |
63 | #define TVE_INP_YCBCR_422 (0x0 << 6) | |
64 | #define TVE_INP_YCBCR_444 (0x1 << 6) | |
65 | #define TVE_DATA_SOURCE_MASK (0x3 << 4) | |
66 | #define TVE_DATA_SOURCE_BUS1 (0x0 << 4) | |
67 | #define TVE_DATA_SOURCE_BUS2 (0x1 << 4) | |
68 | #define TVE_DATA_SOURCE_EXT (0x2 << 4) | |
69 | #define TVE_DATA_SOURCE_TESTGEN (0x3 << 4) | |
70 | #define TVE_IPU_CLK_EN_OFS 3 | |
71 | #define TVE_IPU_CLK_EN BIT(3) | |
72 | #define TVE_DAC_SAMP_RATE_OFS 1 | |
73 | #define TVE_DAC_SAMP_RATE_WIDTH 2 | |
74 | #define TVE_DAC_SAMP_RATE_MASK (0x3 << 1) | |
75 | #define TVE_DAC_FULL_RATE (0x0 << 1) | |
76 | #define TVE_DAC_DIV2_RATE (0x1 << 1) | |
77 | #define TVE_DAC_DIV4_RATE (0x2 << 1) | |
78 | #define TVE_EN BIT(0) | |
79 | ||
80 | /* TVE_TVDACx_CONT_REG */ | |
81 | #define TVE_TVDAC_GAIN_MASK (0x3f << 0) | |
82 | ||
83 | /* TVE_CD_CONT_REG */ | |
84 | #define TVE_CD_CH_2_SM_EN BIT(22) | |
85 | #define TVE_CD_CH_1_SM_EN BIT(21) | |
86 | #define TVE_CD_CH_0_SM_EN BIT(20) | |
87 | #define TVE_CD_CH_2_LM_EN BIT(18) | |
88 | #define TVE_CD_CH_1_LM_EN BIT(17) | |
89 | #define TVE_CD_CH_0_LM_EN BIT(16) | |
90 | #define TVE_CD_CH_2_REF_LVL BIT(10) | |
91 | #define TVE_CD_CH_1_REF_LVL BIT(9) | |
92 | #define TVE_CD_CH_0_REF_LVL BIT(8) | |
93 | #define TVE_CD_EN BIT(0) | |
94 | ||
95 | /* TVE_INT_CONT_REG */ | |
96 | #define TVE_FRAME_END_IEN BIT(13) | |
97 | #define TVE_CD_MON_END_IEN BIT(2) | |
98 | #define TVE_CD_SM_IEN BIT(1) | |
99 | #define TVE_CD_LM_IEN BIT(0) | |
100 | ||
101 | /* TVE_TST_MODE_REG */ | |
102 | #define TVE_TVDAC_TEST_MODE_MASK (0x7 << 0) | |
103 | ||
104 | #define con_to_tve(x) container_of(x, struct imx_tve, connector) | |
105 | #define enc_to_tve(x) container_of(x, struct imx_tve, encoder) | |
106 | ||
107 | enum { | |
108 | TVE_MODE_TVOUT, | |
109 | TVE_MODE_VGA, | |
110 | }; | |
111 | ||
112 | struct imx_tve { | |
113 | struct drm_connector connector; | |
114 | struct imx_drm_connector *imx_drm_connector; | |
115 | struct drm_encoder encoder; | |
116 | struct imx_drm_encoder *imx_drm_encoder; | |
117 | struct device *dev; | |
118 | spinlock_t enable_lock; /* serializes tve_enable/disable */ | |
119 | spinlock_t lock; /* register lock */ | |
120 | bool enabled; | |
121 | int mode; | |
122 | ||
123 | struct regmap *regmap; | |
124 | struct regulator *dac_reg; | |
125 | struct i2c_adapter *ddc; | |
126 | struct clk *clk; | |
127 | struct clk *di_sel_clk; | |
128 | struct clk_hw clk_hw_di; | |
129 | struct clk *di_clk; | |
130 | int vsync_pin; | |
131 | int hsync_pin; | |
132 | }; | |
133 | ||
134 | static void tve_lock(void *__tve) | |
135 | { | |
136 | struct imx_tve *tve = __tve; | |
137 | spin_lock(&tve->lock); | |
138 | } | |
139 | ||
140 | static void tve_unlock(void *__tve) | |
141 | { | |
142 | struct imx_tve *tve = __tve; | |
143 | spin_unlock(&tve->lock); | |
144 | } | |
145 | ||
146 | static void tve_enable(struct imx_tve *tve) | |
147 | { | |
148 | unsigned long flags; | |
149 | int ret; | |
150 | ||
151 | spin_lock_irqsave(&tve->enable_lock, flags); | |
152 | if (!tve->enabled) { | |
153 | tve->enabled = 1; | |
154 | clk_prepare_enable(tve->clk); | |
155 | ret = regmap_update_bits(tve->regmap, TVE_COM_CONF_REG, | |
156 | TVE_IPU_CLK_EN | TVE_EN, | |
157 | TVE_IPU_CLK_EN | TVE_EN); | |
158 | } | |
159 | ||
160 | /* clear interrupt status register */ | |
161 | regmap_write(tve->regmap, TVE_STAT_REG, 0xffffffff); | |
162 | ||
163 | /* cable detection irq disabled in VGA mode, enabled in TVOUT mode */ | |
164 | if (tve->mode == TVE_MODE_VGA) | |
165 | regmap_write(tve->regmap, TVE_INT_CONT_REG, 0); | |
166 | else | |
167 | regmap_write(tve->regmap, TVE_INT_CONT_REG, | |
168 | TVE_CD_SM_IEN | TVE_CD_LM_IEN | TVE_CD_MON_END_IEN); | |
169 | spin_unlock_irqrestore(&tve->enable_lock, flags); | |
170 | } | |
171 | ||
172 | static void tve_disable(struct imx_tve *tve) | |
173 | { | |
174 | unsigned long flags; | |
175 | int ret; | |
176 | ||
177 | spin_lock_irqsave(&tve->enable_lock, flags); | |
178 | if (tve->enabled) { | |
179 | tve->enabled = 0; | |
180 | ret = regmap_update_bits(tve->regmap, TVE_COM_CONF_REG, | |
181 | TVE_IPU_CLK_EN | TVE_EN, 0); | |
182 | clk_disable_unprepare(tve->clk); | |
183 | } | |
184 | spin_unlock_irqrestore(&tve->enable_lock, flags); | |
185 | } | |
186 | ||
187 | static int tve_setup_tvout(struct imx_tve *tve) | |
188 | { | |
189 | return -ENOTSUPP; | |
190 | } | |
191 | ||
192 | static int tve_setup_vga(struct imx_tve *tve) | |
193 | { | |
194 | unsigned int mask; | |
195 | unsigned int val; | |
196 | int ret; | |
197 | ||
198 | /* set gain to (1 + 10/128) to provide 0.7V peak-to-peak amplitude */ | |
199 | ret = regmap_update_bits(tve->regmap, TVE_TVDAC0_CONT_REG, | |
200 | TVE_TVDAC_GAIN_MASK, 0x0a); | |
201 | ret = regmap_update_bits(tve->regmap, TVE_TVDAC1_CONT_REG, | |
202 | TVE_TVDAC_GAIN_MASK, 0x0a); | |
203 | ret = regmap_update_bits(tve->regmap, TVE_TVDAC2_CONT_REG, | |
204 | TVE_TVDAC_GAIN_MASK, 0x0a); | |
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 < 0) { | |
215 | dev_err(tve->dev, "failed to set configuration: %d\n", ret); | |
216 | return ret; | |
217 | } | |
218 | ||
219 | /* set test mode (as documented) */ | |
220 | ret = regmap_update_bits(tve->regmap, TVE_TST_MODE_REG, | |
221 | TVE_TVDAC_TEST_MODE_MASK, 1); | |
222 | ||
223 | return 0; | |
224 | } | |
225 | ||
226 | static enum drm_connector_status imx_tve_connector_detect( | |
227 | struct drm_connector *connector, bool force) | |
228 | { | |
229 | return connector_status_connected; | |
230 | } | |
231 | ||
232 | static void imx_tve_connector_destroy(struct drm_connector *connector) | |
233 | { | |
234 | /* do not free here */ | |
235 | } | |
236 | ||
237 | static int imx_tve_connector_get_modes(struct drm_connector *connector) | |
238 | { | |
239 | struct imx_tve *tve = con_to_tve(connector); | |
240 | struct edid *edid; | |
241 | int ret = 0; | |
242 | ||
243 | if (!tve->ddc) | |
244 | return 0; | |
245 | ||
246 | edid = drm_get_edid(connector, tve->ddc); | |
247 | if (edid) { | |
248 | drm_mode_connector_update_edid_property(connector, edid); | |
249 | ret = drm_add_edid_modes(connector, edid); | |
250 | kfree(edid); | |
251 | } | |
252 | ||
253 | return ret; | |
254 | } | |
255 | ||
256 | static int imx_tve_connector_mode_valid(struct drm_connector *connector, | |
257 | struct drm_display_mode *mode) | |
258 | { | |
259 | struct imx_tve *tve = con_to_tve(connector); | |
260 | unsigned long rate; | |
261 | ||
262 | /* pixel clock with 2x oversampling */ | |
263 | rate = clk_round_rate(tve->clk, 2000UL * mode->clock) / 2000; | |
264 | if (rate == mode->clock) | |
265 | return MODE_OK; | |
266 | ||
267 | /* pixel clock without oversampling */ | |
268 | rate = clk_round_rate(tve->clk, 1000UL * mode->clock) / 1000; | |
269 | if (rate == mode->clock) | |
270 | return MODE_OK; | |
271 | ||
272 | dev_warn(tve->dev, "ignoring mode %dx%d\n", | |
273 | mode->hdisplay, mode->vdisplay); | |
274 | ||
275 | return MODE_BAD; | |
276 | } | |
277 | ||
278 | static struct drm_encoder *imx_tve_connector_best_encoder( | |
279 | struct drm_connector *connector) | |
280 | { | |
281 | struct imx_tve *tve = con_to_tve(connector); | |
282 | ||
283 | return &tve->encoder; | |
284 | } | |
285 | ||
286 | static void imx_tve_encoder_dpms(struct drm_encoder *encoder, int mode) | |
287 | { | |
288 | struct imx_tve *tve = enc_to_tve(encoder); | |
289 | int ret; | |
290 | ||
291 | ret = regmap_update_bits(tve->regmap, TVE_COM_CONF_REG, | |
292 | TVE_TV_OUT_MODE_MASK, TVE_TV_OUT_DISABLE); | |
293 | if (ret < 0) | |
294 | dev_err(tve->dev, "failed to disable TVOUT: %d\n", ret); | |
295 | } | |
296 | ||
297 | static bool imx_tve_encoder_mode_fixup(struct drm_encoder *encoder, | |
298 | const struct drm_display_mode *mode, | |
299 | struct drm_display_mode *adjusted_mode) | |
300 | { | |
301 | return true; | |
302 | } | |
303 | ||
304 | static void imx_tve_encoder_prepare(struct drm_encoder *encoder) | |
305 | { | |
306 | struct imx_tve *tve = enc_to_tve(encoder); | |
307 | ||
308 | tve_disable(tve); | |
309 | ||
310 | switch (tve->mode) { | |
311 | case TVE_MODE_VGA: | |
312 | imx_drm_crtc_panel_format_pins(encoder->crtc, | |
313 | DRM_MODE_ENCODER_DAC, IPU_PIX_FMT_GBR24, | |
314 | tve->hsync_pin, tve->vsync_pin); | |
315 | break; | |
316 | case TVE_MODE_TVOUT: | |
317 | imx_drm_crtc_panel_format(encoder->crtc, DRM_MODE_ENCODER_TVDAC, | |
318 | V4L2_PIX_FMT_YUV444); | |
319 | break; | |
320 | } | |
321 | } | |
322 | ||
323 | static void imx_tve_encoder_mode_set(struct drm_encoder *encoder, | |
324 | struct drm_display_mode *mode, | |
325 | struct drm_display_mode *adjusted_mode) | |
326 | { | |
327 | struct imx_tve *tve = enc_to_tve(encoder); | |
328 | unsigned long rounded_rate; | |
329 | unsigned long rate; | |
330 | int div = 1; | |
331 | int ret; | |
332 | ||
333 | /* | |
334 | * FIXME | |
335 | * we should try 4k * mode->clock first, | |
336 | * and enable 4x oversampling for lower resolutions | |
337 | */ | |
338 | rate = 2000UL * mode->clock; | |
339 | clk_set_rate(tve->clk, rate); | |
340 | rounded_rate = clk_get_rate(tve->clk); | |
341 | if (rounded_rate >= rate) | |
342 | div = 2; | |
343 | clk_set_rate(tve->di_clk, rounded_rate / div); | |
344 | ||
345 | ret = clk_set_parent(tve->di_sel_clk, tve->di_clk); | |
346 | if (ret < 0) { | |
347 | dev_err(tve->dev, "failed to set di_sel parent to tve_di: %d\n", | |
348 | ret); | |
349 | } | |
350 | ||
351 | if (tve->mode == TVE_MODE_VGA) | |
352 | tve_setup_vga(tve); | |
353 | else | |
354 | tve_setup_tvout(tve); | |
355 | } | |
356 | ||
357 | static void imx_tve_encoder_commit(struct drm_encoder *encoder) | |
358 | { | |
359 | struct imx_tve *tve = enc_to_tve(encoder); | |
360 | ||
361 | tve_enable(tve); | |
362 | } | |
363 | ||
364 | static void imx_tve_encoder_disable(struct drm_encoder *encoder) | |
365 | { | |
366 | struct imx_tve *tve = enc_to_tve(encoder); | |
367 | ||
368 | tve_disable(tve); | |
369 | } | |
370 | ||
371 | static void imx_tve_encoder_destroy(struct drm_encoder *encoder) | |
372 | { | |
373 | /* do not free here */ | |
374 | } | |
375 | ||
376 | static struct drm_connector_funcs imx_tve_connector_funcs = { | |
377 | .dpms = drm_helper_connector_dpms, | |
378 | .fill_modes = drm_helper_probe_single_connector_modes, | |
379 | .detect = imx_tve_connector_detect, | |
380 | .destroy = imx_tve_connector_destroy, | |
381 | }; | |
382 | ||
383 | static struct drm_connector_helper_funcs imx_tve_connector_helper_funcs = { | |
384 | .get_modes = imx_tve_connector_get_modes, | |
385 | .best_encoder = imx_tve_connector_best_encoder, | |
386 | .mode_valid = imx_tve_connector_mode_valid, | |
387 | }; | |
388 | ||
389 | static struct drm_encoder_funcs imx_tve_encoder_funcs = { | |
390 | .destroy = imx_tve_encoder_destroy, | |
391 | }; | |
392 | ||
393 | static struct drm_encoder_helper_funcs imx_tve_encoder_helper_funcs = { | |
394 | .dpms = imx_tve_encoder_dpms, | |
395 | .mode_fixup = imx_tve_encoder_mode_fixup, | |
396 | .prepare = imx_tve_encoder_prepare, | |
397 | .mode_set = imx_tve_encoder_mode_set, | |
398 | .commit = imx_tve_encoder_commit, | |
399 | .disable = imx_tve_encoder_disable, | |
400 | }; | |
401 | ||
402 | static irqreturn_t imx_tve_irq_handler(int irq, void *data) | |
403 | { | |
404 | struct imx_tve *tve = data; | |
405 | unsigned int val; | |
406 | ||
407 | regmap_read(tve->regmap, TVE_STAT_REG, &val); | |
408 | ||
409 | /* clear interrupt status register */ | |
410 | regmap_write(tve->regmap, TVE_STAT_REG, 0xffffffff); | |
411 | ||
412 | return IRQ_HANDLED; | |
413 | } | |
414 | ||
415 | static unsigned long clk_tve_di_recalc_rate(struct clk_hw *hw, | |
416 | unsigned long parent_rate) | |
417 | { | |
418 | struct imx_tve *tve = container_of(hw, struct imx_tve, clk_hw_di); | |
419 | unsigned int val; | |
420 | int ret; | |
421 | ||
422 | ret = regmap_read(tve->regmap, TVE_COM_CONF_REG, &val); | |
423 | if (ret < 0) | |
424 | return 0; | |
425 | ||
426 | switch (val & TVE_DAC_SAMP_RATE_MASK) { | |
427 | case TVE_DAC_DIV4_RATE: | |
428 | return parent_rate / 4; | |
429 | case TVE_DAC_DIV2_RATE: | |
430 | return parent_rate / 2; | |
431 | case TVE_DAC_FULL_RATE: | |
432 | default: | |
433 | return parent_rate; | |
434 | } | |
435 | ||
436 | return 0; | |
437 | } | |
438 | ||
439 | static long clk_tve_di_round_rate(struct clk_hw *hw, unsigned long rate, | |
440 | unsigned long *prate) | |
441 | { | |
442 | unsigned long div; | |
443 | ||
444 | div = *prate / rate; | |
445 | if (div >= 4) | |
446 | return *prate / 4; | |
447 | else if (div >= 2) | |
448 | return *prate / 2; | |
449 | else | |
450 | return *prate; | |
451 | } | |
452 | ||
453 | static int clk_tve_di_set_rate(struct clk_hw *hw, unsigned long rate, | |
454 | unsigned long parent_rate) | |
455 | { | |
456 | struct imx_tve *tve = container_of(hw, struct imx_tve, clk_hw_di); | |
457 | unsigned long div; | |
458 | u32 val; | |
459 | int ret; | |
460 | ||
461 | div = parent_rate / rate; | |
462 | if (div >= 4) | |
463 | val = TVE_DAC_DIV4_RATE; | |
464 | else if (div >= 2) | |
465 | val = TVE_DAC_DIV2_RATE; | |
466 | else | |
467 | val = TVE_DAC_FULL_RATE; | |
468 | ||
469 | ret = regmap_update_bits(tve->regmap, TVE_COM_CONF_REG, TVE_DAC_SAMP_RATE_MASK, val); | |
470 | if (ret < 0) { | |
471 | dev_err(tve->dev, "failed to set divider: %d\n", ret); | |
472 | return ret; | |
473 | } | |
474 | ||
475 | return 0; | |
476 | } | |
477 | ||
478 | static struct clk_ops clk_tve_di_ops = { | |
479 | .round_rate = clk_tve_di_round_rate, | |
480 | .set_rate = clk_tve_di_set_rate, | |
481 | .recalc_rate = clk_tve_di_recalc_rate, | |
482 | }; | |
483 | ||
484 | static int tve_clk_init(struct imx_tve *tve, void __iomem *base) | |
485 | { | |
486 | const char *tve_di_parent[1]; | |
487 | struct clk_init_data init = { | |
488 | .name = "tve_di", | |
489 | .ops = &clk_tve_di_ops, | |
490 | .num_parents = 1, | |
491 | .flags = 0, | |
492 | }; | |
493 | ||
494 | tve_di_parent[0] = __clk_get_name(tve->clk); | |
495 | init.parent_names = (const char **)&tve_di_parent; | |
496 | ||
497 | tve->clk_hw_di.init = &init; | |
498 | tve->di_clk = clk_register(tve->dev, &tve->clk_hw_di); | |
499 | if (IS_ERR(tve->di_clk)) { | |
500 | dev_err(tve->dev, "failed to register TVE output clock: %ld\n", | |
501 | PTR_ERR(tve->di_clk)); | |
502 | return PTR_ERR(tve->di_clk); | |
503 | } | |
504 | ||
505 | return 0; | |
506 | } | |
507 | ||
508 | static int imx_tve_register(struct imx_tve *tve) | |
509 | { | |
510 | int ret; | |
511 | ||
512 | tve->connector.funcs = &imx_tve_connector_funcs; | |
513 | tve->encoder.funcs = &imx_tve_encoder_funcs; | |
514 | ||
515 | tve->encoder.encoder_type = DRM_MODE_ENCODER_NONE; | |
516 | tve->connector.connector_type = DRM_MODE_CONNECTOR_VGA; | |
517 | ||
518 | drm_encoder_helper_add(&tve->encoder, &imx_tve_encoder_helper_funcs); | |
519 | ret = imx_drm_add_encoder(&tve->encoder, &tve->imx_drm_encoder, | |
520 | THIS_MODULE); | |
521 | if (ret) { | |
522 | dev_err(tve->dev, "adding encoder failed with %d\n", ret); | |
523 | return ret; | |
524 | } | |
525 | ||
526 | drm_connector_helper_add(&tve->connector, | |
527 | &imx_tve_connector_helper_funcs); | |
528 | ||
529 | ret = imx_drm_add_connector(&tve->connector, | |
530 | &tve->imx_drm_connector, THIS_MODULE); | |
531 | if (ret) { | |
532 | imx_drm_remove_encoder(tve->imx_drm_encoder); | |
533 | dev_err(tve->dev, "adding connector failed with %d\n", ret); | |
534 | return ret; | |
535 | } | |
536 | ||
537 | drm_mode_connector_attach_encoder(&tve->connector, &tve->encoder); | |
538 | ||
539 | return 0; | |
540 | } | |
541 | ||
542 | static bool imx_tve_readable_reg(struct device *dev, unsigned int reg) | |
543 | { | |
544 | return (reg % 4 == 0) && (reg <= 0xdc); | |
545 | } | |
546 | ||
547 | static struct regmap_config tve_regmap_config = { | |
548 | .reg_bits = 32, | |
549 | .val_bits = 32, | |
550 | .reg_stride = 4, | |
551 | ||
552 | .readable_reg = imx_tve_readable_reg, | |
553 | ||
554 | .lock = tve_lock, | |
555 | .unlock = tve_unlock, | |
556 | ||
557 | .max_register = 0xdc, | |
558 | }; | |
559 | ||
560 | static const char *imx_tve_modes[] = { | |
561 | [TVE_MODE_TVOUT] = "tvout", | |
562 | [TVE_MODE_VGA] = "vga", | |
563 | }; | |
564 | ||
565 | const int of_get_tve_mode(struct device_node *np) | |
566 | { | |
567 | const char *bm; | |
568 | int ret, i; | |
569 | ||
570 | ret = of_property_read_string(np, "fsl,tve-mode", &bm); | |
571 | if (ret < 0) | |
572 | return ret; | |
573 | ||
574 | for (i = 0; i < ARRAY_SIZE(imx_tve_modes); i++) | |
575 | if (!strcasecmp(bm, imx_tve_modes[i])) | |
576 | return i; | |
577 | ||
578 | return -EINVAL; | |
579 | } | |
580 | ||
581 | static int imx_tve_probe(struct platform_device *pdev) | |
582 | { | |
583 | struct device_node *np = pdev->dev.of_node; | |
584 | struct device_node *ddc_node; | |
585 | struct imx_tve *tve; | |
586 | struct resource *res; | |
587 | void __iomem *base; | |
588 | unsigned int val; | |
589 | int irq; | |
590 | int ret; | |
591 | ||
592 | tve = devm_kzalloc(&pdev->dev, sizeof(*tve), GFP_KERNEL); | |
593 | if (!tve) | |
594 | return -ENOMEM; | |
595 | ||
596 | tve->dev = &pdev->dev; | |
597 | spin_lock_init(&tve->lock); | |
598 | spin_lock_init(&tve->enable_lock); | |
599 | ||
600 | ddc_node = of_parse_phandle(np, "ddc", 0); | |
601 | if (ddc_node) { | |
602 | tve->ddc = of_find_i2c_adapter_by_node(ddc_node); | |
603 | of_node_put(ddc_node); | |
604 | } | |
605 | ||
606 | tve->mode = of_get_tve_mode(np); | |
607 | if (tve->mode != TVE_MODE_VGA) { | |
608 | dev_err(&pdev->dev, "only VGA mode supported, currently\n"); | |
609 | return -EINVAL; | |
610 | } | |
611 | ||
612 | if (tve->mode == TVE_MODE_VGA) { | |
613 | struct pinctrl *pinctrl; | |
614 | ||
615 | pinctrl = devm_pinctrl_get_select_default(&pdev->dev); | |
616 | if (IS_ERR(pinctrl)) { | |
617 | ret = PTR_ERR(pinctrl); | |
618 | dev_warn(&pdev->dev, "failed to setup pinctrl: %d", ret); | |
619 | return ret; | |
620 | } | |
621 | ||
622 | ret = of_property_read_u32(np, "fsl,hsync-pin", &tve->hsync_pin); | |
623 | if (ret < 0) { | |
624 | dev_err(&pdev->dev, "failed to get vsync pin\n"); | |
625 | return ret; | |
626 | } | |
627 | ||
628 | ret |= of_property_read_u32(np, "fsl,vsync-pin", &tve->vsync_pin); | |
629 | if (ret < 0) { | |
630 | dev_err(&pdev->dev, "failed to get vsync pin\n"); | |
631 | return ret; | |
632 | } | |
633 | } | |
634 | ||
635 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
636 | if (!res) { | |
637 | dev_err(&pdev->dev, "failed to get memory region\n"); | |
638 | return -ENOENT; | |
639 | } | |
640 | ||
9b43b56f LN |
641 | base = devm_ioremap_resource(&pdev->dev, res); |
642 | if (IS_ERR(base)) | |
643 | return PTR_ERR(base); | |
fcbc51e5 PZ |
644 | |
645 | tve_regmap_config.lock_arg = tve; | |
646 | tve->regmap = devm_regmap_init_mmio_clk(&pdev->dev, "tve", base, | |
647 | &tve_regmap_config); | |
648 | if (IS_ERR(tve->regmap)) { | |
649 | dev_err(&pdev->dev, "failed to init regmap: %ld\n", | |
650 | PTR_ERR(tve->regmap)); | |
651 | return PTR_ERR(tve->regmap); | |
652 | } | |
653 | ||
654 | irq = platform_get_irq(pdev, 0); | |
655 | if (irq < 0) { | |
656 | dev_err(&pdev->dev, "failed to get irq\n"); | |
657 | return irq; | |
658 | } | |
659 | ||
660 | ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, | |
661 | imx_tve_irq_handler, IRQF_ONESHOT, | |
662 | "imx-tve", tve); | |
663 | if (ret < 0) { | |
664 | dev_err(&pdev->dev, "failed to request irq: %d\n", ret); | |
665 | return ret; | |
666 | } | |
667 | ||
668 | tve->dac_reg = devm_regulator_get(&pdev->dev, "dac"); | |
669 | if (!IS_ERR(tve->dac_reg)) { | |
670 | regulator_set_voltage(tve->dac_reg, 2750000, 2750000); | |
671 | regulator_enable(tve->dac_reg); | |
672 | } | |
673 | ||
674 | tve->clk = devm_clk_get(&pdev->dev, "tve"); | |
675 | if (IS_ERR(tve->clk)) { | |
676 | dev_err(&pdev->dev, "failed to get high speed tve clock: %ld\n", | |
677 | PTR_ERR(tve->clk)); | |
678 | return PTR_ERR(tve->clk); | |
679 | } | |
680 | ||
681 | /* this is the IPU DI clock input selector, can be parented to tve_di */ | |
682 | tve->di_sel_clk = devm_clk_get(&pdev->dev, "di_sel"); | |
683 | if (IS_ERR(tve->di_sel_clk)) { | |
684 | dev_err(&pdev->dev, "failed to get ipu di mux clock: %ld\n", | |
685 | PTR_ERR(tve->di_sel_clk)); | |
686 | return PTR_ERR(tve->di_sel_clk); | |
687 | } | |
688 | ||
689 | ret = tve_clk_init(tve, base); | |
690 | if (ret < 0) | |
691 | return ret; | |
692 | ||
693 | ret = regmap_read(tve->regmap, TVE_COM_CONF_REG, &val); | |
694 | if (ret < 0) { | |
695 | dev_err(&pdev->dev, "failed to read configuration register: %d\n", ret); | |
696 | return ret; | |
697 | } | |
698 | if (val != 0x00100000) { | |
699 | dev_err(&pdev->dev, "configuration register default value indicates this is not a TVEv2\n"); | |
700 | return -ENODEV; | |
701 | }; | |
702 | ||
703 | /* disable cable detection for VGA mode */ | |
704 | ret = regmap_write(tve->regmap, TVE_CD_CONT_REG, 0); | |
705 | ||
706 | ret = imx_tve_register(tve); | |
707 | if (ret) | |
708 | return ret; | |
709 | ||
710 | ret = imx_drm_encoder_add_possible_crtcs(tve->imx_drm_encoder, np); | |
711 | ||
712 | platform_set_drvdata(pdev, tve); | |
713 | ||
714 | return 0; | |
715 | } | |
716 | ||
717 | static int imx_tve_remove(struct platform_device *pdev) | |
718 | { | |
719 | struct imx_tve *tve = platform_get_drvdata(pdev); | |
720 | struct drm_connector *connector = &tve->connector; | |
721 | struct drm_encoder *encoder = &tve->encoder; | |
722 | ||
723 | drm_mode_connector_detach_encoder(connector, encoder); | |
724 | ||
725 | imx_drm_remove_connector(tve->imx_drm_connector); | |
726 | imx_drm_remove_encoder(tve->imx_drm_encoder); | |
727 | ||
728 | if (!IS_ERR(tve->dac_reg)) | |
729 | regulator_disable(tve->dac_reg); | |
730 | ||
731 | return 0; | |
732 | } | |
733 | ||
734 | static const struct of_device_id imx_tve_dt_ids[] = { | |
735 | { .compatible = "fsl,imx53-tve", }, | |
736 | { /* sentinel */ } | |
737 | }; | |
738 | ||
739 | static struct platform_driver imx_tve_driver = { | |
740 | .probe = imx_tve_probe, | |
741 | .remove = imx_tve_remove, | |
742 | .driver = { | |
743 | .of_match_table = imx_tve_dt_ids, | |
744 | .name = "imx-tve", | |
745 | .owner = THIS_MODULE, | |
746 | }, | |
747 | }; | |
748 | ||
749 | module_platform_driver(imx_tve_driver); | |
750 | ||
751 | MODULE_DESCRIPTION("i.MX Television Encoder driver"); | |
752 | MODULE_AUTHOR("Philipp Zabel, Pengutronix"); | |
753 | MODULE_LICENSE("GPL"); |