Commit | Line | Data |
---|---|---|
ac4c1a9b SH |
1 | /* |
2 | * i.MX drm driver - LVDS display bridge | |
3 | * | |
4 | * Copyright (C) 2012 Sascha Hauer, 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/module.h> | |
22 | #include <linux/clk.h> | |
17b5001b | 23 | #include <linux/component.h> |
ac4c1a9b SH |
24 | #include <drm/drmP.h> |
25 | #include <drm/drm_fb_helper.h> | |
26 | #include <drm/drm_crtc_helper.h> | |
27 | #include <linux/mfd/syscon.h> | |
28 | #include <linux/mfd/syscon/imx6q-iomuxc-gpr.h> | |
29 | #include <linux/of_address.h> | |
30 | #include <linux/of_device.h> | |
31 | #include <video/of_videomode.h> | |
32 | #include <linux/regmap.h> | |
33 | #include <linux/videodev2.h> | |
34 | ||
35 | #include "imx-drm.h" | |
36 | ||
37 | #define DRIVER_NAME "imx-ldb" | |
38 | ||
39 | #define LDB_CH0_MODE_EN_TO_DI0 (1 << 0) | |
40 | #define LDB_CH0_MODE_EN_TO_DI1 (3 << 0) | |
41 | #define LDB_CH0_MODE_EN_MASK (3 << 0) | |
42 | #define LDB_CH1_MODE_EN_TO_DI0 (1 << 2) | |
43 | #define LDB_CH1_MODE_EN_TO_DI1 (3 << 2) | |
44 | #define LDB_CH1_MODE_EN_MASK (3 << 2) | |
45 | #define LDB_SPLIT_MODE_EN (1 << 4) | |
46 | #define LDB_DATA_WIDTH_CH0_24 (1 << 5) | |
47 | #define LDB_BIT_MAP_CH0_JEIDA (1 << 6) | |
48 | #define LDB_DATA_WIDTH_CH1_24 (1 << 7) | |
49 | #define LDB_BIT_MAP_CH1_JEIDA (1 << 8) | |
50 | #define LDB_DI0_VS_POL_ACT_LOW (1 << 9) | |
51 | #define LDB_DI1_VS_POL_ACT_LOW (1 << 10) | |
52 | #define LDB_BGREF_RMODE_INT (1 << 15) | |
53 | ||
54 | #define con_to_imx_ldb_ch(x) container_of(x, struct imx_ldb_channel, connector) | |
55 | #define enc_to_imx_ldb_ch(x) container_of(x, struct imx_ldb_channel, encoder) | |
56 | ||
57 | struct imx_ldb; | |
58 | ||
59 | struct imx_ldb_channel { | |
60 | struct imx_ldb *ldb; | |
61 | struct drm_connector connector; | |
ac4c1a9b | 62 | struct drm_encoder encoder; |
1b3f7675 | 63 | struct device_node *child; |
ac4c1a9b SH |
64 | int chno; |
65 | void *edid; | |
66 | int edid_len; | |
67 | struct drm_display_mode mode; | |
68 | int mode_valid; | |
69 | }; | |
70 | ||
71 | struct bus_mux { | |
72 | int reg; | |
73 | int shift; | |
74 | int mask; | |
75 | }; | |
76 | ||
77 | struct imx_ldb { | |
78 | struct regmap *regmap; | |
79 | struct device *dev; | |
80 | struct imx_ldb_channel channel[2]; | |
81 | struct clk *clk[2]; /* our own clock */ | |
82 | struct clk *clk_sel[4]; /* parent of display clock */ | |
83 | struct clk *clk_pll[2]; /* upstream clock we can adjust */ | |
84 | u32 ldb_ctrl; | |
85 | const struct bus_mux *lvds_mux; | |
86 | }; | |
87 | ||
88 | static enum drm_connector_status imx_ldb_connector_detect( | |
89 | struct drm_connector *connector, bool force) | |
90 | { | |
91 | return connector_status_connected; | |
92 | } | |
93 | ||
ac4c1a9b SH |
94 | static int imx_ldb_connector_get_modes(struct drm_connector *connector) |
95 | { | |
96 | struct imx_ldb_channel *imx_ldb_ch = con_to_imx_ldb_ch(connector); | |
97 | int num_modes = 0; | |
98 | ||
99 | if (imx_ldb_ch->edid) { | |
100 | drm_mode_connector_update_edid_property(connector, | |
101 | imx_ldb_ch->edid); | |
102 | num_modes = drm_add_edid_modes(connector, imx_ldb_ch->edid); | |
103 | } | |
104 | ||
105 | if (imx_ldb_ch->mode_valid) { | |
106 | struct drm_display_mode *mode; | |
107 | ||
108 | mode = drm_mode_create(connector->dev); | |
9f9b036f FE |
109 | if (!mode) |
110 | return -EINVAL; | |
ac4c1a9b SH |
111 | drm_mode_copy(mode, &imx_ldb_ch->mode); |
112 | mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; | |
113 | drm_mode_probed_add(connector, mode); | |
114 | num_modes++; | |
115 | } | |
116 | ||
117 | return num_modes; | |
118 | } | |
119 | ||
ac4c1a9b SH |
120 | static struct drm_encoder *imx_ldb_connector_best_encoder( |
121 | struct drm_connector *connector) | |
122 | { | |
123 | struct imx_ldb_channel *imx_ldb_ch = con_to_imx_ldb_ch(connector); | |
124 | ||
125 | return &imx_ldb_ch->encoder; | |
126 | } | |
127 | ||
128 | static void imx_ldb_encoder_dpms(struct drm_encoder *encoder, int mode) | |
129 | { | |
130 | } | |
131 | ||
132 | static bool imx_ldb_encoder_mode_fixup(struct drm_encoder *encoder, | |
133 | const struct drm_display_mode *mode, | |
134 | struct drm_display_mode *adjusted_mode) | |
135 | { | |
136 | return true; | |
137 | } | |
138 | ||
139 | static void imx_ldb_set_clock(struct imx_ldb *ldb, int mux, int chno, | |
140 | unsigned long serial_clk, unsigned long di_clk) | |
141 | { | |
142 | int ret; | |
143 | ||
144 | dev_dbg(ldb->dev, "%s: now: %ld want: %ld\n", __func__, | |
145 | clk_get_rate(ldb->clk_pll[chno]), serial_clk); | |
146 | clk_set_rate(ldb->clk_pll[chno], serial_clk); | |
147 | ||
148 | dev_dbg(ldb->dev, "%s after: %ld\n", __func__, | |
149 | clk_get_rate(ldb->clk_pll[chno])); | |
150 | ||
151 | dev_dbg(ldb->dev, "%s: now: %ld want: %ld\n", __func__, | |
152 | clk_get_rate(ldb->clk[chno]), | |
153 | (long int)di_clk); | |
154 | clk_set_rate(ldb->clk[chno], di_clk); | |
155 | ||
156 | dev_dbg(ldb->dev, "%s after: %ld\n", __func__, | |
157 | clk_get_rate(ldb->clk[chno])); | |
158 | ||
159 | /* set display clock mux to LDB input clock */ | |
160 | ret = clk_set_parent(ldb->clk_sel[mux], ldb->clk[chno]); | |
49f4a9c8 | 161 | if (ret) |
e5e1b166 AO |
162 | dev_err(ldb->dev, |
163 | "unable to set di%d parent clock to ldb_di%d\n", mux, | |
164 | chno); | |
ac4c1a9b SH |
165 | } |
166 | ||
167 | static void imx_ldb_encoder_prepare(struct drm_encoder *encoder) | |
168 | { | |
169 | struct imx_ldb_channel *imx_ldb_ch = enc_to_imx_ldb_ch(encoder); | |
170 | struct imx_ldb *ldb = imx_ldb_ch->ldb; | |
171 | struct drm_display_mode *mode = &encoder->crtc->mode; | |
000d73fc | 172 | u32 pixel_fmt; |
ac4c1a9b SH |
173 | unsigned long serial_clk; |
174 | unsigned long di_clk = mode->clock * 1000; | |
655b43cc | 175 | int mux = imx_drm_encoder_get_mux_id(imx_ldb_ch->child, encoder); |
ac4c1a9b SH |
176 | |
177 | if (ldb->ldb_ctrl & LDB_SPLIT_MODE_EN) { | |
178 | /* dual channel LVDS mode */ | |
179 | serial_clk = 3500UL * mode->clock; | |
180 | imx_ldb_set_clock(ldb, mux, 0, serial_clk, di_clk); | |
181 | imx_ldb_set_clock(ldb, mux, 1, serial_clk, di_clk); | |
182 | } else { | |
183 | serial_clk = 7000UL * mode->clock; | |
e5e1b166 AO |
184 | imx_ldb_set_clock(ldb, mux, imx_ldb_ch->chno, serial_clk, |
185 | di_clk); | |
ac4c1a9b SH |
186 | } |
187 | ||
000d73fc MN |
188 | switch (imx_ldb_ch->chno) { |
189 | case 0: | |
190 | pixel_fmt = (ldb->ldb_ctrl & LDB_DATA_WIDTH_CH0_24) ? | |
191 | V4L2_PIX_FMT_RGB24 : V4L2_PIX_FMT_BGR666; | |
192 | break; | |
193 | case 1: | |
194 | pixel_fmt = (ldb->ldb_ctrl & LDB_DATA_WIDTH_CH1_24) ? | |
195 | V4L2_PIX_FMT_RGB24 : V4L2_PIX_FMT_BGR666; | |
196 | break; | |
197 | default: | |
198 | dev_err(ldb->dev, "unable to config di%d panel format\n", | |
199 | imx_ldb_ch->chno); | |
200 | pixel_fmt = V4L2_PIX_FMT_RGB24; | |
201 | } | |
202 | ||
f2d66aad | 203 | imx_drm_panel_format(encoder, pixel_fmt); |
ac4c1a9b SH |
204 | } |
205 | ||
206 | static void imx_ldb_encoder_commit(struct drm_encoder *encoder) | |
207 | { | |
208 | struct imx_ldb_channel *imx_ldb_ch = enc_to_imx_ldb_ch(encoder); | |
209 | struct imx_ldb *ldb = imx_ldb_ch->ldb; | |
210 | int dual = ldb->ldb_ctrl & LDB_SPLIT_MODE_EN; | |
655b43cc | 211 | int mux = imx_drm_encoder_get_mux_id(imx_ldb_ch->child, encoder); |
ac4c1a9b SH |
212 | |
213 | if (dual) { | |
214 | clk_prepare_enable(ldb->clk[0]); | |
215 | clk_prepare_enable(ldb->clk[1]); | |
216 | } | |
217 | ||
218 | if (imx_ldb_ch == &ldb->channel[0] || dual) { | |
219 | ldb->ldb_ctrl &= ~LDB_CH0_MODE_EN_MASK; | |
220 | if (mux == 0 || ldb->lvds_mux) | |
221 | ldb->ldb_ctrl |= LDB_CH0_MODE_EN_TO_DI0; | |
222 | else if (mux == 1) | |
223 | ldb->ldb_ctrl |= LDB_CH0_MODE_EN_TO_DI1; | |
224 | } | |
225 | if (imx_ldb_ch == &ldb->channel[1] || dual) { | |
226 | ldb->ldb_ctrl &= ~LDB_CH1_MODE_EN_MASK; | |
227 | if (mux == 1 || ldb->lvds_mux) | |
228 | ldb->ldb_ctrl |= LDB_CH1_MODE_EN_TO_DI1; | |
229 | else if (mux == 0) | |
230 | ldb->ldb_ctrl |= LDB_CH1_MODE_EN_TO_DI0; | |
231 | } | |
232 | ||
233 | if (ldb->lvds_mux) { | |
234 | const struct bus_mux *lvds_mux = NULL; | |
235 | ||
236 | if (imx_ldb_ch == &ldb->channel[0]) | |
237 | lvds_mux = &ldb->lvds_mux[0]; | |
238 | else if (imx_ldb_ch == &ldb->channel[1]) | |
239 | lvds_mux = &ldb->lvds_mux[1]; | |
240 | ||
241 | regmap_update_bits(ldb->regmap, lvds_mux->reg, lvds_mux->mask, | |
242 | mux << lvds_mux->shift); | |
243 | } | |
244 | ||
245 | regmap_write(ldb->regmap, IOMUXC_GPR2, ldb->ldb_ctrl); | |
246 | } | |
247 | ||
248 | static void imx_ldb_encoder_mode_set(struct drm_encoder *encoder, | |
249 | struct drm_display_mode *mode, | |
250 | struct drm_display_mode *adjusted_mode) | |
251 | { | |
252 | struct imx_ldb_channel *imx_ldb_ch = enc_to_imx_ldb_ch(encoder); | |
253 | struct imx_ldb *ldb = imx_ldb_ch->ldb; | |
254 | int dual = ldb->ldb_ctrl & LDB_SPLIT_MODE_EN; | |
255 | ||
256 | if (mode->clock > 170000) { | |
257 | dev_warn(ldb->dev, | |
258 | "%s: mode exceeds 170 MHz pixel clock\n", __func__); | |
259 | } | |
260 | if (mode->clock > 85000 && !dual) { | |
261 | dev_warn(ldb->dev, | |
262 | "%s: mode exceeds 85 MHz pixel clock\n", __func__); | |
263 | } | |
264 | ||
265 | /* FIXME - assumes straight connections DI0 --> CH0, DI1 --> CH1 */ | |
266 | if (imx_ldb_ch == &ldb->channel[0]) { | |
267 | if (mode->flags & DRM_MODE_FLAG_NVSYNC) | |
268 | ldb->ldb_ctrl |= LDB_DI0_VS_POL_ACT_LOW; | |
269 | else if (mode->flags & DRM_MODE_FLAG_PVSYNC) | |
270 | ldb->ldb_ctrl &= ~LDB_DI0_VS_POL_ACT_LOW; | |
271 | } | |
272 | if (imx_ldb_ch == &ldb->channel[1]) { | |
273 | if (mode->flags & DRM_MODE_FLAG_NVSYNC) | |
274 | ldb->ldb_ctrl |= LDB_DI1_VS_POL_ACT_LOW; | |
275 | else if (mode->flags & DRM_MODE_FLAG_PVSYNC) | |
276 | ldb->ldb_ctrl &= ~LDB_DI1_VS_POL_ACT_LOW; | |
277 | } | |
278 | } | |
279 | ||
280 | static void imx_ldb_encoder_disable(struct drm_encoder *encoder) | |
281 | { | |
282 | struct imx_ldb_channel *imx_ldb_ch = enc_to_imx_ldb_ch(encoder); | |
283 | struct imx_ldb *ldb = imx_ldb_ch->ldb; | |
284 | ||
285 | /* | |
286 | * imx_ldb_encoder_disable is called by | |
287 | * drm_helper_disable_unused_functions without | |
288 | * the encoder being enabled before. | |
289 | */ | |
290 | if (imx_ldb_ch == &ldb->channel[0] && | |
291 | (ldb->ldb_ctrl & LDB_CH0_MODE_EN_MASK) == 0) | |
292 | return; | |
293 | else if (imx_ldb_ch == &ldb->channel[1] && | |
294 | (ldb->ldb_ctrl & LDB_CH1_MODE_EN_MASK) == 0) | |
295 | return; | |
296 | ||
297 | if (imx_ldb_ch == &ldb->channel[0]) | |
298 | ldb->ldb_ctrl &= ~LDB_CH0_MODE_EN_MASK; | |
299 | else if (imx_ldb_ch == &ldb->channel[1]) | |
300 | ldb->ldb_ctrl &= ~LDB_CH1_MODE_EN_MASK; | |
301 | ||
302 | regmap_write(ldb->regmap, IOMUXC_GPR2, ldb->ldb_ctrl); | |
303 | ||
304 | if (ldb->ldb_ctrl & LDB_SPLIT_MODE_EN) { | |
305 | clk_disable_unprepare(ldb->clk[0]); | |
306 | clk_disable_unprepare(ldb->clk[1]); | |
307 | } | |
308 | } | |
309 | ||
ac4c1a9b SH |
310 | static struct drm_connector_funcs imx_ldb_connector_funcs = { |
311 | .dpms = drm_helper_connector_dpms, | |
312 | .fill_modes = drm_helper_probe_single_connector_modes, | |
313 | .detect = imx_ldb_connector_detect, | |
1b3f7675 | 314 | .destroy = imx_drm_connector_destroy, |
ac4c1a9b SH |
315 | }; |
316 | ||
317 | static struct drm_connector_helper_funcs imx_ldb_connector_helper_funcs = { | |
318 | .get_modes = imx_ldb_connector_get_modes, | |
319 | .best_encoder = imx_ldb_connector_best_encoder, | |
ac4c1a9b SH |
320 | }; |
321 | ||
322 | static struct drm_encoder_funcs imx_ldb_encoder_funcs = { | |
1b3f7675 | 323 | .destroy = imx_drm_encoder_destroy, |
ac4c1a9b SH |
324 | }; |
325 | ||
326 | static struct drm_encoder_helper_funcs imx_ldb_encoder_helper_funcs = { | |
327 | .dpms = imx_ldb_encoder_dpms, | |
328 | .mode_fixup = imx_ldb_encoder_mode_fixup, | |
329 | .prepare = imx_ldb_encoder_prepare, | |
330 | .commit = imx_ldb_encoder_commit, | |
331 | .mode_set = imx_ldb_encoder_mode_set, | |
332 | .disable = imx_ldb_encoder_disable, | |
333 | }; | |
334 | ||
335 | static int imx_ldb_get_clk(struct imx_ldb *ldb, int chno) | |
336 | { | |
337 | char clkname[16]; | |
338 | ||
98dd3b2a | 339 | snprintf(clkname, sizeof(clkname), "di%d", chno); |
ac4c1a9b SH |
340 | ldb->clk[chno] = devm_clk_get(ldb->dev, clkname); |
341 | if (IS_ERR(ldb->clk[chno])) | |
342 | return PTR_ERR(ldb->clk[chno]); | |
343 | ||
98dd3b2a | 344 | snprintf(clkname, sizeof(clkname), "di%d_pll", chno); |
ac4c1a9b | 345 | ldb->clk_pll[chno] = devm_clk_get(ldb->dev, clkname); |
ac4c1a9b | 346 | |
1f933fa8 | 347 | return PTR_ERR_OR_ZERO(ldb->clk_pll[chno]); |
ac4c1a9b SH |
348 | } |
349 | ||
1b3f7675 RK |
350 | static int imx_ldb_register(struct drm_device *drm, |
351 | struct imx_ldb_channel *imx_ldb_ch) | |
ac4c1a9b | 352 | { |
ac4c1a9b | 353 | struct imx_ldb *ldb = imx_ldb_ch->ldb; |
1b3f7675 RK |
354 | int ret; |
355 | ||
356 | ret = imx_drm_encoder_parse_of(drm, &imx_ldb_ch->encoder, | |
357 | imx_ldb_ch->child); | |
358 | if (ret) | |
359 | return ret; | |
ac4c1a9b SH |
360 | |
361 | ret = imx_ldb_get_clk(ldb, imx_ldb_ch->chno); | |
362 | if (ret) | |
363 | return ret; | |
1b3f7675 | 364 | |
ac4c1a9b | 365 | if (ldb->ldb_ctrl & LDB_SPLIT_MODE_EN) { |
1b3f7675 | 366 | ret = imx_ldb_get_clk(ldb, 1); |
ac4c1a9b SH |
367 | if (ret) |
368 | return ret; | |
369 | } | |
370 | ||
ac4c1a9b SH |
371 | drm_encoder_helper_add(&imx_ldb_ch->encoder, |
372 | &imx_ldb_encoder_helper_funcs); | |
1b3f7675 RK |
373 | drm_encoder_init(drm, &imx_ldb_ch->encoder, &imx_ldb_encoder_funcs, |
374 | DRM_MODE_ENCODER_LVDS); | |
ac4c1a9b SH |
375 | |
376 | drm_connector_helper_add(&imx_ldb_ch->connector, | |
377 | &imx_ldb_connector_helper_funcs); | |
1b3f7675 RK |
378 | drm_connector_init(drm, &imx_ldb_ch->connector, |
379 | &imx_ldb_connector_funcs, DRM_MODE_CONNECTOR_LVDS); | |
ac4c1a9b SH |
380 | |
381 | drm_mode_connector_attach_encoder(&imx_ldb_ch->connector, | |
382 | &imx_ldb_ch->encoder); | |
383 | ||
384 | return 0; | |
385 | } | |
386 | ||
387 | enum { | |
388 | LVDS_BIT_MAP_SPWG, | |
389 | LVDS_BIT_MAP_JEIDA | |
390 | }; | |
391 | ||
5354cb64 | 392 | static const char * const imx_ldb_bit_mappings[] = { |
ac4c1a9b SH |
393 | [LVDS_BIT_MAP_SPWG] = "spwg", |
394 | [LVDS_BIT_MAP_JEIDA] = "jeida", | |
395 | }; | |
396 | ||
d78b1406 | 397 | static const int of_get_data_mapping(struct device_node *np) |
ac4c1a9b SH |
398 | { |
399 | const char *bm; | |
400 | int ret, i; | |
401 | ||
402 | ret = of_property_read_string(np, "fsl,data-mapping", &bm); | |
403 | if (ret < 0) | |
404 | return ret; | |
405 | ||
406 | for (i = 0; i < ARRAY_SIZE(imx_ldb_bit_mappings); i++) | |
407 | if (!strcasecmp(bm, imx_ldb_bit_mappings[i])) | |
408 | return i; | |
409 | ||
410 | return -EINVAL; | |
411 | } | |
412 | ||
413 | static struct bus_mux imx6q_lvds_mux[2] = { | |
414 | { | |
415 | .reg = IOMUXC_GPR3, | |
416 | .shift = 6, | |
417 | .mask = IMX6Q_GPR3_LVDS0_MUX_CTL_MASK, | |
418 | }, { | |
419 | .reg = IOMUXC_GPR3, | |
420 | .shift = 8, | |
421 | .mask = IMX6Q_GPR3_LVDS1_MUX_CTL_MASK, | |
422 | } | |
423 | }; | |
424 | ||
425 | /* | |
426 | * For a device declaring compatible = "fsl,imx6q-ldb", "fsl,imx53-ldb", | |
427 | * of_match_device will walk through this list and take the first entry | |
428 | * matching any of its compatible values. Therefore, the more generic | |
429 | * entries (in this case fsl,imx53-ldb) need to be ordered last. | |
430 | */ | |
431 | static const struct of_device_id imx_ldb_dt_ids[] = { | |
432 | { .compatible = "fsl,imx6q-ldb", .data = imx6q_lvds_mux, }, | |
433 | { .compatible = "fsl,imx53-ldb", .data = NULL, }, | |
434 | { } | |
435 | }; | |
436 | MODULE_DEVICE_TABLE(of, imx_ldb_dt_ids); | |
437 | ||
17b5001b | 438 | static int imx_ldb_bind(struct device *dev, struct device *master, void *data) |
ac4c1a9b | 439 | { |
1b3f7675 | 440 | struct drm_device *drm = data; |
17b5001b | 441 | struct device_node *np = dev->of_node; |
ac4c1a9b | 442 | const struct of_device_id *of_id = |
17b5001b | 443 | of_match_device(imx_ldb_dt_ids, dev); |
ac4c1a9b SH |
444 | struct device_node *child; |
445 | const u8 *edidp; | |
446 | struct imx_ldb *imx_ldb; | |
447 | int datawidth; | |
448 | int mapping; | |
449 | int dual; | |
450 | int ret; | |
451 | int i; | |
452 | ||
17b5001b | 453 | imx_ldb = devm_kzalloc(dev, sizeof(*imx_ldb), GFP_KERNEL); |
ac4c1a9b SH |
454 | if (!imx_ldb) |
455 | return -ENOMEM; | |
456 | ||
457 | imx_ldb->regmap = syscon_regmap_lookup_by_phandle(np, "gpr"); | |
458 | if (IS_ERR(imx_ldb->regmap)) { | |
17b5001b | 459 | dev_err(dev, "failed to get parent regmap\n"); |
ac4c1a9b SH |
460 | return PTR_ERR(imx_ldb->regmap); |
461 | } | |
462 | ||
17b5001b | 463 | imx_ldb->dev = dev; |
ac4c1a9b SH |
464 | |
465 | if (of_id) | |
466 | imx_ldb->lvds_mux = of_id->data; | |
467 | ||
468 | dual = of_property_read_bool(np, "fsl,dual-channel"); | |
469 | if (dual) | |
470 | imx_ldb->ldb_ctrl |= LDB_SPLIT_MODE_EN; | |
471 | ||
472 | /* | |
4599934d | 473 | * There are three different possible clock mux configurations: |
ac4c1a9b SH |
474 | * i.MX53: ipu1_di0_sel, ipu1_di1_sel |
475 | * i.MX6q: ipu1_di0_sel, ipu1_di1_sel, ipu2_di0_sel, ipu2_di1_sel | |
476 | * i.MX6dl: ipu1_di0_sel, ipu1_di1_sel, lcdif_sel | |
477 | * Map them all to di0_sel...di3_sel. | |
478 | */ | |
479 | for (i = 0; i < 4; i++) { | |
480 | char clkname[16]; | |
481 | ||
482 | sprintf(clkname, "di%d_sel", i); | |
483 | imx_ldb->clk_sel[i] = devm_clk_get(imx_ldb->dev, clkname); | |
484 | if (IS_ERR(imx_ldb->clk_sel[i])) { | |
485 | ret = PTR_ERR(imx_ldb->clk_sel[i]); | |
486 | imx_ldb->clk_sel[i] = NULL; | |
487 | break; | |
488 | } | |
489 | } | |
490 | if (i == 0) | |
491 | return ret; | |
492 | ||
493 | for_each_child_of_node(np, child) { | |
494 | struct imx_ldb_channel *channel; | |
495 | ||
496 | ret = of_property_read_u32(child, "reg", &i); | |
497 | if (ret || i < 0 || i > 1) | |
498 | return -EINVAL; | |
499 | ||
500 | if (dual && i > 0) { | |
17b5001b | 501 | dev_warn(dev, "dual-channel mode, ignoring second output\n"); |
ac4c1a9b SH |
502 | continue; |
503 | } | |
504 | ||
505 | if (!of_device_is_available(child)) | |
506 | continue; | |
507 | ||
508 | channel = &imx_ldb->channel[i]; | |
509 | channel->ldb = imx_ldb; | |
510 | channel->chno = i; | |
1b3f7675 | 511 | channel->child = child; |
ac4c1a9b SH |
512 | |
513 | edidp = of_get_property(child, "edid", &channel->edid_len); | |
514 | if (edidp) { | |
515 | channel->edid = kmemdup(edidp, channel->edid_len, | |
516 | GFP_KERNEL); | |
517 | } else { | |
518 | ret = of_get_drm_display_mode(child, &channel->mode, 0); | |
519 | if (!ret) | |
520 | channel->mode_valid = 1; | |
521 | } | |
522 | ||
523 | ret = of_property_read_u32(child, "fsl,data-width", &datawidth); | |
524 | if (ret) | |
525 | datawidth = 0; | |
526 | else if (datawidth != 18 && datawidth != 24) | |
527 | return -EINVAL; | |
528 | ||
529 | mapping = of_get_data_mapping(child); | |
530 | switch (mapping) { | |
531 | case LVDS_BIT_MAP_SPWG: | |
532 | if (datawidth == 24) { | |
533 | if (i == 0 || dual) | |
e5e1b166 AO |
534 | imx_ldb->ldb_ctrl |= |
535 | LDB_DATA_WIDTH_CH0_24; | |
ac4c1a9b | 536 | if (i == 1 || dual) |
e5e1b166 AO |
537 | imx_ldb->ldb_ctrl |= |
538 | LDB_DATA_WIDTH_CH1_24; | |
ac4c1a9b SH |
539 | } |
540 | break; | |
541 | case LVDS_BIT_MAP_JEIDA: | |
542 | if (datawidth == 18) { | |
17b5001b | 543 | dev_err(dev, "JEIDA standard only supported in 24 bit\n"); |
ac4c1a9b SH |
544 | return -EINVAL; |
545 | } | |
546 | if (i == 0 || dual) | |
e5e1b166 AO |
547 | imx_ldb->ldb_ctrl |= LDB_DATA_WIDTH_CH0_24 | |
548 | LDB_BIT_MAP_CH0_JEIDA; | |
ac4c1a9b | 549 | if (i == 1 || dual) |
e5e1b166 AO |
550 | imx_ldb->ldb_ctrl |= LDB_DATA_WIDTH_CH1_24 | |
551 | LDB_BIT_MAP_CH1_JEIDA; | |
ac4c1a9b SH |
552 | break; |
553 | default: | |
17b5001b | 554 | dev_err(dev, "data mapping not specified or invalid\n"); |
ac4c1a9b SH |
555 | return -EINVAL; |
556 | } | |
557 | ||
1b3f7675 | 558 | ret = imx_ldb_register(drm, channel); |
ac4c1a9b SH |
559 | if (ret) |
560 | return ret; | |
ac4c1a9b SH |
561 | } |
562 | ||
17b5001b | 563 | dev_set_drvdata(dev, imx_ldb); |
ac4c1a9b SH |
564 | |
565 | return 0; | |
566 | } | |
567 | ||
17b5001b RK |
568 | static void imx_ldb_unbind(struct device *dev, struct device *master, |
569 | void *data) | |
ac4c1a9b | 570 | { |
17b5001b | 571 | struct imx_ldb *imx_ldb = dev_get_drvdata(dev); |
ac4c1a9b SH |
572 | int i; |
573 | ||
574 | for (i = 0; i < 2; i++) { | |
575 | struct imx_ldb_channel *channel = &imx_ldb->channel[i]; | |
ac4c1a9b | 576 | |
1b3f7675 RK |
577 | channel->connector.funcs->destroy(&channel->connector); |
578 | channel->encoder.funcs->destroy(&channel->encoder); | |
ac4c1a9b | 579 | } |
17b5001b | 580 | } |
ac4c1a9b | 581 | |
17b5001b RK |
582 | static const struct component_ops imx_ldb_ops = { |
583 | .bind = imx_ldb_bind, | |
584 | .unbind = imx_ldb_unbind, | |
585 | }; | |
586 | ||
587 | static int imx_ldb_probe(struct platform_device *pdev) | |
588 | { | |
589 | return component_add(&pdev->dev, &imx_ldb_ops); | |
590 | } | |
591 | ||
592 | static int imx_ldb_remove(struct platform_device *pdev) | |
593 | { | |
594 | component_del(&pdev->dev, &imx_ldb_ops); | |
ac4c1a9b SH |
595 | return 0; |
596 | } | |
597 | ||
598 | static struct platform_driver imx_ldb_driver = { | |
599 | .probe = imx_ldb_probe, | |
600 | .remove = imx_ldb_remove, | |
601 | .driver = { | |
602 | .of_match_table = imx_ldb_dt_ids, | |
603 | .name = DRIVER_NAME, | |
604 | .owner = THIS_MODULE, | |
605 | }, | |
606 | }; | |
607 | ||
608 | module_platform_driver(imx_ldb_driver); | |
609 | ||
610 | MODULE_DESCRIPTION("i.MX LVDS driver"); | |
611 | MODULE_AUTHOR("Sascha Hauer, Pengutronix"); | |
612 | MODULE_LICENSE("GPL"); | |
bc627387 | 613 | MODULE_ALIAS("platform:" DRIVER_NAME); |