Commit | Line | Data |
---|---|---|
b7ee79ab SS |
1 | /* |
2 | * OMAP2plus display device setup / initialization. | |
3 | * | |
4 | * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/ | |
5 | * Senthilvadivu Guruswamy | |
6 | * Sumit Semwal | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | * | |
12 | * This program is distributed "as is" WITHOUT ANY WARRANTY of any | |
13 | * kind, whether express or implied; without even the implied warranty | |
14 | * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | */ | |
17 | ||
d44b28c4 | 18 | #include <linux/string.h> |
b7ee79ab SS |
19 | #include <linux/kernel.h> |
20 | #include <linux/init.h> | |
21 | #include <linux/platform_device.h> | |
22 | #include <linux/io.h> | |
23 | #include <linux/clk.h> | |
24 | #include <linux/err.h> | |
deee6d53 | 25 | #include <linux/delay.h> |
b7ee79ab | 26 | |
a0b38cc4 | 27 | #include <video/omapdss.h> |
cf07f531 SG |
28 | #include <plat/omap_hwmod.h> |
29 | #include <plat/omap_device.h> | |
700dee78 | 30 | #include <plat/omap-pm.h> |
deee6d53 | 31 | #include "common.h" |
b7ee79ab | 32 | |
ee0839c2 | 33 | #include "iomap.h" |
ee9dfd82 | 34 | #include "mux.h" |
dc35835c | 35 | #include "control.h" |
b923d40d AT |
36 | #include "display.h" |
37 | ||
38 | #define DISPC_CONTROL 0x0040 | |
39 | #define DISPC_CONTROL2 0x0238 | |
465698ee | 40 | #define DISPC_CONTROL3 0x0848 |
b923d40d AT |
41 | #define DISPC_IRQSTATUS 0x0018 |
42 | ||
43 | #define DSS_SYSCONFIG 0x10 | |
44 | #define DSS_SYSSTATUS 0x14 | |
45 | #define DSS_CONTROL 0x40 | |
46 | #define DSS_SDI_CONTROL 0x44 | |
47 | #define DSS_PLL_CONTROL 0x48 | |
48 | ||
49 | #define LCD_EN_MASK (0x1 << 0) | |
50 | #define DIGIT_EN_MASK (0x1 << 1) | |
51 | ||
52 | #define FRAMEDONE_IRQ_SHIFT 0 | |
53 | #define EVSYNC_EVEN_IRQ_SHIFT 2 | |
54 | #define EVSYNC_ODD_IRQ_SHIFT 3 | |
55 | #define FRAMEDONE2_IRQ_SHIFT 22 | |
465698ee | 56 | #define FRAMEDONE3_IRQ_SHIFT 30 |
b923d40d AT |
57 | #define FRAMEDONETV_IRQ_SHIFT 24 |
58 | ||
59 | /* | |
60 | * FRAMEDONE_IRQ_TIMEOUT: how long (in milliseconds) to wait during DISPC | |
61 | * reset before deciding that something has gone wrong | |
62 | */ | |
63 | #define FRAMEDONE_IRQ_TIMEOUT 100 | |
dc35835c | 64 | |
b7ee79ab SS |
65 | static struct platform_device omap_display_device = { |
66 | .name = "omapdss", | |
67 | .id = -1, | |
68 | .dev = { | |
69 | .platform_data = NULL, | |
70 | }, | |
71 | }; | |
72 | ||
179e0453 AT |
73 | struct omap_dss_hwmod_data { |
74 | const char *oh_name; | |
75 | const char *dev_name; | |
76 | const int id; | |
77 | }; | |
78 | ||
79 | static const struct omap_dss_hwmod_data omap2_dss_hwmod_data[] __initdata = { | |
80 | { "dss_core", "omapdss_dss", -1 }, | |
81 | { "dss_dispc", "omapdss_dispc", -1 }, | |
82 | { "dss_rfbi", "omapdss_rfbi", -1 }, | |
83 | { "dss_venc", "omapdss_venc", -1 }, | |
84 | }; | |
85 | ||
86 | static const struct omap_dss_hwmod_data omap3_dss_hwmod_data[] __initdata = { | |
87 | { "dss_core", "omapdss_dss", -1 }, | |
88 | { "dss_dispc", "omapdss_dispc", -1 }, | |
89 | { "dss_rfbi", "omapdss_rfbi", -1 }, | |
90 | { "dss_venc", "omapdss_venc", -1 }, | |
7c68dd96 | 91 | { "dss_dsi1", "omapdss_dsi", 0 }, |
179e0453 AT |
92 | }; |
93 | ||
94 | static const struct omap_dss_hwmod_data omap4_dss_hwmod_data[] __initdata = { | |
95 | { "dss_core", "omapdss_dss", -1 }, | |
96 | { "dss_dispc", "omapdss_dispc", -1 }, | |
97 | { "dss_rfbi", "omapdss_rfbi", -1 }, | |
98 | { "dss_venc", "omapdss_venc", -1 }, | |
7c68dd96 TV |
99 | { "dss_dsi1", "omapdss_dsi", 0 }, |
100 | { "dss_dsi2", "omapdss_dsi", 1 }, | |
179e0453 AT |
101 | { "dss_hdmi", "omapdss_hdmi", -1 }, |
102 | }; | |
103 | ||
e8a30b25 | 104 | static void __init omap4_hdmi_mux_pads(enum omap_hdmi_flags flags) |
ee9dfd82 | 105 | { |
9a901683 M |
106 | u32 reg; |
107 | u16 control_i2c_1; | |
108 | ||
ee9dfd82 M |
109 | omap_mux_init_signal("hdmi_cec", |
110 | OMAP_PIN_INPUT_PULLUP); | |
ee9dfd82 M |
111 | omap_mux_init_signal("hdmi_ddc_scl", |
112 | OMAP_PIN_INPUT_PULLUP); | |
113 | omap_mux_init_signal("hdmi_ddc_sda", | |
114 | OMAP_PIN_INPUT_PULLUP); | |
9a901683 M |
115 | |
116 | /* | |
117 | * CONTROL_I2C_1: HDMI_DDC_SDA_PULLUPRESX (bit 28) and | |
118 | * HDMI_DDC_SCL_PULLUPRESX (bit 24) are set to disable | |
119 | * internal pull up resistor. | |
120 | */ | |
121 | if (flags & OMAP_HDMI_SDA_SCL_EXTERNAL_PULLUP) { | |
122 | control_i2c_1 = OMAP4_CTRL_MODULE_PAD_CORE_CONTROL_I2C_1; | |
123 | reg = omap4_ctrl_pad_readl(control_i2c_1); | |
124 | reg |= (OMAP4_HDMI_DDC_SDA_PULLUPRESX_MASK | | |
125 | OMAP4_HDMI_DDC_SCL_PULLUPRESX_MASK); | |
126 | omap4_ctrl_pad_writel(reg, control_i2c_1); | |
127 | } | |
ee9dfd82 M |
128 | } |
129 | ||
e8a30b25 | 130 | static int omap4_dsi_mux_pads(int dsi_id, unsigned lanes) |
dc35835c TV |
131 | { |
132 | u32 enable_mask, enable_shift; | |
133 | u32 pipd_mask, pipd_shift; | |
134 | u32 reg; | |
135 | ||
136 | if (dsi_id == 0) { | |
137 | enable_mask = OMAP4_DSI1_LANEENABLE_MASK; | |
138 | enable_shift = OMAP4_DSI1_LANEENABLE_SHIFT; | |
139 | pipd_mask = OMAP4_DSI1_PIPD_MASK; | |
140 | pipd_shift = OMAP4_DSI1_PIPD_SHIFT; | |
141 | } else if (dsi_id == 1) { | |
142 | enable_mask = OMAP4_DSI2_LANEENABLE_MASK; | |
143 | enable_shift = OMAP4_DSI2_LANEENABLE_SHIFT; | |
144 | pipd_mask = OMAP4_DSI2_PIPD_MASK; | |
145 | pipd_shift = OMAP4_DSI2_PIPD_SHIFT; | |
146 | } else { | |
147 | return -ENODEV; | |
148 | } | |
149 | ||
150 | reg = omap4_ctrl_pad_readl(OMAP4_CTRL_MODULE_PAD_CORE_CONTROL_DSIPHY); | |
151 | ||
152 | reg &= ~enable_mask; | |
153 | reg &= ~pipd_mask; | |
154 | ||
155 | reg |= (lanes << enable_shift) & enable_mask; | |
156 | reg |= (lanes << pipd_shift) & pipd_mask; | |
157 | ||
158 | omap4_ctrl_pad_writel(reg, OMAP4_CTRL_MODULE_PAD_CORE_CONTROL_DSIPHY); | |
159 | ||
160 | return 0; | |
161 | } | |
162 | ||
d1589f09 | 163 | int __init omap_hdmi_init(enum omap_hdmi_flags flags) |
ee9dfd82 M |
164 | { |
165 | if (cpu_is_omap44xx()) | |
9a901683 | 166 | omap4_hdmi_mux_pads(flags); |
ee9dfd82 M |
167 | |
168 | return 0; | |
169 | } | |
170 | ||
e8a30b25 | 171 | static int omap_dsi_enable_pads(int dsi_id, unsigned lane_mask) |
5bc416cb | 172 | { |
dc35835c TV |
173 | if (cpu_is_omap44xx()) |
174 | return omap4_dsi_mux_pads(dsi_id, lane_mask); | |
175 | ||
5bc416cb TV |
176 | return 0; |
177 | } | |
178 | ||
e8a30b25 | 179 | static void omap_dsi_disable_pads(int dsi_id, unsigned lane_mask) |
5bc416cb | 180 | { |
dc35835c TV |
181 | if (cpu_is_omap44xx()) |
182 | omap4_dsi_mux_pads(dsi_id, 0); | |
5bc416cb TV |
183 | } |
184 | ||
62c1dcfc TV |
185 | static int omap_dss_set_min_bus_tput(struct device *dev, unsigned long tput) |
186 | { | |
187 | return omap_pm_set_min_bus_tput(dev, OCP_INITIATOR_AGENT, tput); | |
188 | } | |
189 | ||
966eaed0 TV |
190 | static struct platform_device *create_dss_pdev(const char *pdev_name, |
191 | int pdev_id, const char *oh_name, void *pdata, int pdata_len, | |
192 | struct platform_device *parent) | |
193 | { | |
194 | struct platform_device *pdev; | |
195 | struct omap_device *od; | |
196 | struct omap_hwmod *ohs[1]; | |
197 | struct omap_hwmod *oh; | |
198 | int r; | |
199 | ||
200 | oh = omap_hwmod_lookup(oh_name); | |
201 | if (!oh) { | |
202 | pr_err("Could not look up %s\n", oh_name); | |
203 | r = -ENODEV; | |
204 | goto err; | |
205 | } | |
206 | ||
207 | pdev = platform_device_alloc(pdev_name, pdev_id); | |
208 | if (!pdev) { | |
209 | pr_err("Could not create pdev for %s\n", pdev_name); | |
210 | r = -ENOMEM; | |
211 | goto err; | |
212 | } | |
213 | ||
214 | if (parent != NULL) | |
215 | pdev->dev.parent = &parent->dev; | |
216 | ||
217 | if (pdev->id != -1) | |
218 | dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id); | |
219 | else | |
220 | dev_set_name(&pdev->dev, "%s", pdev->name); | |
221 | ||
222 | ohs[0] = oh; | |
223 | od = omap_device_alloc(pdev, ohs, 1, NULL, 0); | |
224 | if (!od) { | |
225 | pr_err("Could not alloc omap_device for %s\n", pdev_name); | |
226 | r = -ENOMEM; | |
227 | goto err; | |
228 | } | |
229 | ||
230 | r = platform_device_add_data(pdev, pdata, pdata_len); | |
231 | if (r) { | |
232 | pr_err("Could not set pdata for %s\n", pdev_name); | |
233 | goto err; | |
234 | } | |
235 | ||
236 | r = omap_device_register(pdev); | |
237 | if (r) { | |
238 | pr_err("Could not register omap_device for %s\n", pdev_name); | |
239 | goto err; | |
240 | } | |
241 | ||
242 | return pdev; | |
243 | ||
244 | err: | |
245 | return ERR_PTR(r); | |
246 | } | |
247 | ||
53f576a8 TV |
248 | static struct platform_device *create_simple_dss_pdev(const char *pdev_name, |
249 | int pdev_id, void *pdata, int pdata_len, | |
250 | struct platform_device *parent) | |
251 | { | |
252 | struct platform_device *pdev; | |
253 | int r; | |
254 | ||
255 | pdev = platform_device_alloc(pdev_name, pdev_id); | |
256 | if (!pdev) { | |
257 | pr_err("Could not create pdev for %s\n", pdev_name); | |
258 | r = -ENOMEM; | |
259 | goto err; | |
260 | } | |
261 | ||
262 | if (parent != NULL) | |
263 | pdev->dev.parent = &parent->dev; | |
264 | ||
265 | if (pdev->id != -1) | |
266 | dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id); | |
267 | else | |
268 | dev_set_name(&pdev->dev, "%s", pdev->name); | |
269 | ||
270 | r = platform_device_add_data(pdev, pdata, pdata_len); | |
271 | if (r) { | |
272 | pr_err("Could not set pdata for %s\n", pdev_name); | |
273 | goto err; | |
274 | } | |
275 | ||
c3a21fc7 | 276 | r = platform_device_add(pdev); |
53f576a8 | 277 | if (r) { |
c3a21fc7 | 278 | pr_err("Could not register platform_device for %s\n", pdev_name); |
53f576a8 TV |
279 | goto err; |
280 | } | |
281 | ||
282 | return pdev; | |
283 | ||
284 | err: | |
285 | return ERR_PTR(r); | |
286 | } | |
287 | ||
b7ee79ab SS |
288 | int __init omap_display_init(struct omap_dss_board_info *board_data) |
289 | { | |
290 | int r = 0; | |
3528c58e | 291 | struct platform_device *pdev; |
179e0453 | 292 | int i, oh_count; |
179e0453 | 293 | const struct omap_dss_hwmod_data *curr_dss_hwmod; |
966eaed0 | 294 | struct platform_device *dss_pdev; |
cf07f531 | 295 | |
00928eaf TV |
296 | /* create omapdss device */ |
297 | ||
298 | board_data->dsi_enable_pads = omap_dsi_enable_pads; | |
299 | board_data->dsi_disable_pads = omap_dsi_disable_pads; | |
300 | board_data->get_context_loss_count = omap_pm_get_dev_context_loss_count; | |
301 | board_data->set_min_bus_tput = omap_dss_set_min_bus_tput; | |
302 | ||
303 | omap_display_device.dev.platform_data = board_data; | |
304 | ||
305 | r = platform_device_register(&omap_display_device); | |
306 | if (r < 0) { | |
307 | pr_err("Unable to register omapdss device\n"); | |
308 | return r; | |
309 | } | |
310 | ||
311 | /* create devices for dss hwmods */ | |
cf07f531 | 312 | |
179e0453 AT |
313 | if (cpu_is_omap24xx()) { |
314 | curr_dss_hwmod = omap2_dss_hwmod_data; | |
315 | oh_count = ARRAY_SIZE(omap2_dss_hwmod_data); | |
316 | } else if (cpu_is_omap34xx()) { | |
317 | curr_dss_hwmod = omap3_dss_hwmod_data; | |
318 | oh_count = ARRAY_SIZE(omap3_dss_hwmod_data); | |
319 | } else { | |
320 | curr_dss_hwmod = omap4_dss_hwmod_data; | |
321 | oh_count = ARRAY_SIZE(omap4_dss_hwmod_data); | |
322 | } | |
545376e7 | 323 | |
966eaed0 TV |
324 | /* |
325 | * First create the pdev for dss_core, which is used as a parent device | |
326 | * by the other dss pdevs. Note: dss_core has to be the first item in | |
327 | * the hwmod list. | |
328 | */ | |
329 | dss_pdev = create_dss_pdev(curr_dss_hwmod[0].dev_name, | |
330 | curr_dss_hwmod[0].id, | |
331 | curr_dss_hwmod[0].oh_name, | |
35deca3d | 332 | board_data, sizeof(*board_data), |
966eaed0 | 333 | NULL); |
fd4b34f6 | 334 | |
966eaed0 TV |
335 | if (IS_ERR(dss_pdev)) { |
336 | pr_err("Could not build omap_device for %s\n", | |
337 | curr_dss_hwmod[0].oh_name); | |
338 | ||
339 | return PTR_ERR(dss_pdev); | |
340 | } | |
341 | ||
342 | for (i = 1; i < oh_count; i++) { | |
343 | pdev = create_dss_pdev(curr_dss_hwmod[i].dev_name, | |
344 | curr_dss_hwmod[i].id, | |
345 | curr_dss_hwmod[i].oh_name, | |
35deca3d | 346 | board_data, sizeof(*board_data), |
966eaed0 TV |
347 | dss_pdev); |
348 | ||
349 | if (IS_ERR(pdev)) { | |
350 | pr_err("Could not build omap_device for %s\n", | |
351 | curr_dss_hwmod[i].oh_name); | |
cf07f531 | 352 | |
966eaed0 TV |
353 | return PTR_ERR(pdev); |
354 | } | |
cf07f531 | 355 | } |
b7ee79ab | 356 | |
53f576a8 TV |
357 | /* Create devices for DPI and SDI */ |
358 | ||
35deca3d TV |
359 | pdev = create_simple_dss_pdev("omapdss_dpi", -1, |
360 | board_data, sizeof(*board_data), dss_pdev); | |
53f576a8 TV |
361 | if (IS_ERR(pdev)) { |
362 | pr_err("Could not build platform_device for omapdss_dpi\n"); | |
363 | return PTR_ERR(pdev); | |
364 | } | |
365 | ||
366 | if (cpu_is_omap34xx()) { | |
35deca3d TV |
367 | pdev = create_simple_dss_pdev("omapdss_sdi", -1, |
368 | board_data, sizeof(*board_data), dss_pdev); | |
53f576a8 TV |
369 | if (IS_ERR(pdev)) { |
370 | pr_err("Could not build platform_device for omapdss_sdi\n"); | |
371 | return PTR_ERR(pdev); | |
372 | } | |
373 | } | |
374 | ||
00928eaf | 375 | return 0; |
b7ee79ab | 376 | } |
13662dc5 | 377 | |
b923d40d AT |
378 | static void dispc_disable_outputs(void) |
379 | { | |
380 | u32 v, irq_mask = 0; | |
465698ee | 381 | bool lcd_en, digit_en, lcd2_en = false, lcd3_en = false; |
b923d40d AT |
382 | int i; |
383 | struct omap_dss_dispc_dev_attr *da; | |
384 | struct omap_hwmod *oh; | |
385 | ||
386 | oh = omap_hwmod_lookup("dss_dispc"); | |
387 | if (!oh) { | |
388 | WARN(1, "display: could not disable outputs during reset - could not find dss_dispc hwmod\n"); | |
389 | return; | |
390 | } | |
391 | ||
392 | if (!oh->dev_attr) { | |
393 | pr_err("display: could not disable outputs during reset due to missing dev_attr\n"); | |
394 | return; | |
395 | } | |
396 | ||
397 | da = (struct omap_dss_dispc_dev_attr *)oh->dev_attr; | |
398 | ||
399 | /* store value of LCDENABLE and DIGITENABLE bits */ | |
400 | v = omap_hwmod_read(oh, DISPC_CONTROL); | |
401 | lcd_en = v & LCD_EN_MASK; | |
402 | digit_en = v & DIGIT_EN_MASK; | |
403 | ||
404 | /* store value of LCDENABLE for LCD2 */ | |
405 | if (da->manager_count > 2) { | |
406 | v = omap_hwmod_read(oh, DISPC_CONTROL2); | |
407 | lcd2_en = v & LCD_EN_MASK; | |
408 | } | |
409 | ||
465698ee CM |
410 | /* store value of LCDENABLE for LCD3 */ |
411 | if (da->manager_count > 3) { | |
412 | v = omap_hwmod_read(oh, DISPC_CONTROL3); | |
413 | lcd3_en = v & LCD_EN_MASK; | |
414 | } | |
415 | ||
416 | if (!(lcd_en | digit_en | lcd2_en | lcd3_en)) | |
b923d40d AT |
417 | return; /* no managers currently enabled */ |
418 | ||
419 | /* | |
420 | * If any manager was enabled, we need to disable it before | |
421 | * DSS clocks are disabled or DISPC module is reset | |
422 | */ | |
423 | if (lcd_en) | |
424 | irq_mask |= 1 << FRAMEDONE_IRQ_SHIFT; | |
425 | ||
426 | if (digit_en) { | |
427 | if (da->has_framedonetv_irq) { | |
428 | irq_mask |= 1 << FRAMEDONETV_IRQ_SHIFT; | |
429 | } else { | |
430 | irq_mask |= 1 << EVSYNC_EVEN_IRQ_SHIFT | | |
431 | 1 << EVSYNC_ODD_IRQ_SHIFT; | |
432 | } | |
433 | } | |
434 | ||
435 | if (lcd2_en) | |
436 | irq_mask |= 1 << FRAMEDONE2_IRQ_SHIFT; | |
465698ee CM |
437 | if (lcd3_en) |
438 | irq_mask |= 1 << FRAMEDONE3_IRQ_SHIFT; | |
b923d40d AT |
439 | |
440 | /* | |
441 | * clear any previous FRAMEDONE, FRAMEDONETV, | |
465698ee | 442 | * EVSYNC_EVEN/ODD, FRAMEDONE2 or FRAMEDONE3 interrupts |
b923d40d AT |
443 | */ |
444 | omap_hwmod_write(irq_mask, oh, DISPC_IRQSTATUS); | |
445 | ||
446 | /* disable LCD and TV managers */ | |
447 | v = omap_hwmod_read(oh, DISPC_CONTROL); | |
448 | v &= ~(LCD_EN_MASK | DIGIT_EN_MASK); | |
449 | omap_hwmod_write(v, oh, DISPC_CONTROL); | |
450 | ||
451 | /* disable LCD2 manager */ | |
452 | if (da->manager_count > 2) { | |
453 | v = omap_hwmod_read(oh, DISPC_CONTROL2); | |
454 | v &= ~LCD_EN_MASK; | |
455 | omap_hwmod_write(v, oh, DISPC_CONTROL2); | |
456 | } | |
457 | ||
465698ee CM |
458 | /* disable LCD3 manager */ |
459 | if (da->manager_count > 3) { | |
460 | v = omap_hwmod_read(oh, DISPC_CONTROL3); | |
461 | v &= ~LCD_EN_MASK; | |
462 | omap_hwmod_write(v, oh, DISPC_CONTROL3); | |
463 | } | |
464 | ||
b923d40d AT |
465 | i = 0; |
466 | while ((omap_hwmod_read(oh, DISPC_IRQSTATUS) & irq_mask) != | |
467 | irq_mask) { | |
468 | i++; | |
469 | if (i > FRAMEDONE_IRQ_TIMEOUT) { | |
465698ee | 470 | pr_err("didn't get FRAMEDONE1/2/3 or TV interrupt\n"); |
b923d40d AT |
471 | break; |
472 | } | |
473 | mdelay(1); | |
474 | } | |
475 | } | |
476 | ||
13662dc5 TV |
477 | #define MAX_MODULE_SOFTRESET_WAIT 10000 |
478 | int omap_dss_reset(struct omap_hwmod *oh) | |
479 | { | |
480 | struct omap_hwmod_opt_clk *oc; | |
481 | int c = 0; | |
482 | int i, r; | |
483 | ||
484 | if (!(oh->class->sysc->sysc_flags & SYSS_HAS_RESET_STATUS)) { | |
485 | pr_err("dss_core: hwmod data doesn't contain reset data\n"); | |
486 | return -EINVAL; | |
487 | } | |
488 | ||
489 | for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++) | |
490 | if (oc->_clk) | |
491 | clk_enable(oc->_clk); | |
492 | ||
b923d40d AT |
493 | dispc_disable_outputs(); |
494 | ||
495 | /* clear SDI registers */ | |
496 | if (cpu_is_omap3430()) { | |
497 | omap_hwmod_write(0x0, oh, DSS_SDI_CONTROL); | |
498 | omap_hwmod_write(0x0, oh, DSS_PLL_CONTROL); | |
499 | } | |
500 | ||
501 | /* | |
502 | * clear DSS_CONTROL register to switch DSS clock sources to | |
503 | * PRCM clock, if any | |
504 | */ | |
505 | omap_hwmod_write(0x0, oh, DSS_CONTROL); | |
506 | ||
13662dc5 TV |
507 | omap_test_timeout((omap_hwmod_read(oh, oh->class->sysc->syss_offs) |
508 | & SYSS_RESETDONE_MASK), | |
509 | MAX_MODULE_SOFTRESET_WAIT, c); | |
510 | ||
511 | if (c == MAX_MODULE_SOFTRESET_WAIT) | |
512 | pr_warning("dss_core: waiting for reset to finish failed\n"); | |
513 | else | |
514 | pr_debug("dss_core: softreset done\n"); | |
515 | ||
516 | for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++) | |
517 | if (oc->_clk) | |
518 | clk_disable(oc->_clk); | |
519 | ||
520 | r = (c == MAX_MODULE_SOFTRESET_WAIT) ? -ETIMEDOUT : 0; | |
521 | ||
522 | return r; | |
523 | } |