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23#define DSS_SUBSYS_NAME "DPI"
24
25#include <linux/kernel.h>
26#include <linux/delay.h>
27#include <linux/export.h>
28#include <linux/err.h>
29#include <linux/errno.h>
30#include <linux/platform_device.h>
31#include <linux/regulator/consumer.h>
32#include <linux/string.h>
33
34#include <video/omapdss.h>
35
36#include "dss.h"
37#include "dss_features.h"
38
39static struct {
40 struct regulator *vdds_dsi_reg;
41 struct platform_device *dsidev;
42
43 struct mutex lock;
44
45 struct omap_video_timings timings;
46 struct dss_lcd_mgr_config mgr_config;
47 int data_lines;
48
49 struct omap_dss_output output;
50} dpi;
51
52static struct platform_device *dpi_get_dsidev(enum omap_dss_clk_source clk)
53{
54 int dsi_module;
55
56 dsi_module = clk == OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC ? 0 : 1;
57
58 return dsi_get_dsidev_from_id(dsi_module);
59}
60
61static bool dpi_use_dsi_pll(struct omap_dss_device *dssdev)
62{
63 if (dssdev->clocks.dispc.dispc_fclk_src ==
64 OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC ||
65 dssdev->clocks.dispc.dispc_fclk_src ==
66 OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DISPC ||
67 dssdev->clocks.dispc.channel.lcd_clk_src ==
68 OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC ||
69 dssdev->clocks.dispc.channel.lcd_clk_src ==
70 OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DISPC)
71 return true;
72 else
73 return false;
74}
75
76static int dpi_set_dsi_clk(struct omap_dss_device *dssdev,
77 unsigned long pck_req, unsigned long *fck, int *lck_div,
78 int *pck_div)
79{
80 struct dsi_clock_info dsi_cinfo;
81 struct dispc_clock_info dispc_cinfo;
82 int r;
83
84 r = dsi_pll_calc_clock_div_pck(dpi.dsidev, pck_req, &dsi_cinfo,
85 &dispc_cinfo);
86 if (r)
87 return r;
88
89 r = dsi_pll_set_clock_div(dpi.dsidev, &dsi_cinfo);
90 if (r)
91 return r;
92
93 dss_select_dispc_clk_source(dssdev->clocks.dispc.dispc_fclk_src);
94
95 dpi.mgr_config.clock_info = dispc_cinfo;
96
97 *fck = dsi_cinfo.dsi_pll_hsdiv_dispc_clk;
98 *lck_div = dispc_cinfo.lck_div;
99 *pck_div = dispc_cinfo.pck_div;
100
101 return 0;
102}
103
104static int dpi_set_dispc_clk(struct omap_dss_device *dssdev,
105 unsigned long pck_req, unsigned long *fck, int *lck_div,
106 int *pck_div)
107{
108 struct dss_clock_info dss_cinfo;
109 struct dispc_clock_info dispc_cinfo;
110 int r;
111
112 r = dss_calc_clock_div(pck_req, &dss_cinfo, &dispc_cinfo);
113 if (r)
114 return r;
115
116 r = dss_set_clock_div(&dss_cinfo);
117 if (r)
118 return r;
119
120 dpi.mgr_config.clock_info = dispc_cinfo;
121
122 *fck = dss_cinfo.fck;
123 *lck_div = dispc_cinfo.lck_div;
124 *pck_div = dispc_cinfo.pck_div;
125
126 return 0;
127}
128
129static int dpi_set_mode(struct omap_dss_device *dssdev)
130{
131 struct omap_video_timings *t = &dpi.timings;
132 struct omap_overlay_manager *mgr = dssdev->output->manager;
133 int lck_div = 0, pck_div = 0;
134 unsigned long fck = 0;
135 unsigned long pck;
136 int r = 0;
137
138 if (dpi_use_dsi_pll(dssdev))
139 r = dpi_set_dsi_clk(dssdev, t->pixel_clock * 1000, &fck,
140 &lck_div, &pck_div);
141 else
142 r = dpi_set_dispc_clk(dssdev, t->pixel_clock * 1000, &fck,
143 &lck_div, &pck_div);
144 if (r)
145 return r;
146
147 pck = fck / lck_div / pck_div / 1000;
148
149 if (pck != t->pixel_clock) {
150 DSSWARN("Could not find exact pixel clock. "
151 "Requested %d kHz, got %lu kHz\n",
152 t->pixel_clock, pck);
153
154 t->pixel_clock = pck;
155 }
156
157 dss_mgr_set_timings(mgr, t);
158
159 return 0;
160}
161
162static void dpi_config_lcd_manager(struct omap_dss_device *dssdev)
163{
164 struct omap_overlay_manager *mgr = dssdev->output->manager;
165
166 dpi.mgr_config.io_pad_mode = DSS_IO_PAD_MODE_BYPASS;
167
168 dpi.mgr_config.stallmode = false;
169 dpi.mgr_config.fifohandcheck = false;
170
171 dpi.mgr_config.video_port_width = dpi.data_lines;
172
173 dpi.mgr_config.lcden_sig_polarity = 0;
174
175 dss_mgr_set_lcd_config(mgr, &dpi.mgr_config);
176}
177
178int omapdss_dpi_display_enable(struct omap_dss_device *dssdev)
179{
180 struct omap_dss_output *out = dssdev->output;
181 int r;
182
183 mutex_lock(&dpi.lock);
184
185 if (dss_has_feature(FEAT_DPI_USES_VDDS_DSI) && !dpi.vdds_dsi_reg) {
186 DSSERR("no VDSS_DSI regulator\n");
187 r = -ENODEV;
188 goto err_no_reg;
189 }
190
191 if (out == NULL || out->manager == NULL) {
192 DSSERR("failed to enable display: no output/manager\n");
193 r = -ENODEV;
194 goto err_no_out_mgr;
195 }
196
197 r = omap_dss_start_device(dssdev);
198 if (r) {
199 DSSERR("failed to start device\n");
200 goto err_start_dev;
201 }
202
203 if (dss_has_feature(FEAT_DPI_USES_VDDS_DSI)) {
204 r = regulator_enable(dpi.vdds_dsi_reg);
205 if (r)
206 goto err_reg_enable;
207 }
208
209 r = dispc_runtime_get();
210 if (r)
211 goto err_get_dispc;
212
213 r = dss_dpi_select_source(dssdev->channel);
214 if (r)
215 goto err_src_sel;
216
217 if (dpi_use_dsi_pll(dssdev)) {
218 r = dsi_runtime_get(dpi.dsidev);
219 if (r)
220 goto err_get_dsi;
221
222 r = dsi_pll_init(dpi.dsidev, 0, 1);
223 if (r)
224 goto err_dsi_pll_init;
225 }
226
227 r = dpi_set_mode(dssdev);
228 if (r)
229 goto err_set_mode;
230
231 dpi_config_lcd_manager(dssdev);
232
233 mdelay(2);
234
235 r = dss_mgr_enable(out->manager);
236 if (r)
237 goto err_mgr_enable;
238
239 mutex_unlock(&dpi.lock);
240
241 return 0;
242
243err_mgr_enable:
244err_set_mode:
245 if (dpi_use_dsi_pll(dssdev))
246 dsi_pll_uninit(dpi.dsidev, true);
247err_dsi_pll_init:
248 if (dpi_use_dsi_pll(dssdev))
249 dsi_runtime_put(dpi.dsidev);
250err_get_dsi:
251err_src_sel:
252 dispc_runtime_put();
253err_get_dispc:
254 if (dss_has_feature(FEAT_DPI_USES_VDDS_DSI))
255 regulator_disable(dpi.vdds_dsi_reg);
256err_reg_enable:
257 omap_dss_stop_device(dssdev);
258err_start_dev:
259err_no_out_mgr:
260err_no_reg:
261 mutex_unlock(&dpi.lock);
262 return r;
263}
264EXPORT_SYMBOL(omapdss_dpi_display_enable);
265
266void omapdss_dpi_display_disable(struct omap_dss_device *dssdev)
267{
268 struct omap_overlay_manager *mgr = dssdev->output->manager;
269
270 mutex_lock(&dpi.lock);
271
272 dss_mgr_disable(mgr);
273
274 if (dpi_use_dsi_pll(dssdev)) {
275 dss_select_dispc_clk_source(OMAP_DSS_CLK_SRC_FCK);
276 dsi_pll_uninit(dpi.dsidev, true);
277 dsi_runtime_put(dpi.dsidev);
278 }
279
280 dispc_runtime_put();
281
282 if (dss_has_feature(FEAT_DPI_USES_VDDS_DSI))
283 regulator_disable(dpi.vdds_dsi_reg);
284
285 omap_dss_stop_device(dssdev);
286
287 mutex_unlock(&dpi.lock);
288}
289EXPORT_SYMBOL(omapdss_dpi_display_disable);
290
291void omapdss_dpi_set_timings(struct omap_dss_device *dssdev,
292 struct omap_video_timings *timings)
293{
294 DSSDBG("dpi_set_timings\n");
295
296 mutex_lock(&dpi.lock);
297
298 dpi.timings = *timings;
299
300 mutex_unlock(&dpi.lock);
301}
302EXPORT_SYMBOL(omapdss_dpi_set_timings);
303
304int dpi_check_timings(struct omap_dss_device *dssdev,
305 struct omap_video_timings *timings)
306{
307 int r;
308 struct omap_overlay_manager *mgr = dssdev->output->manager;
309 int lck_div, pck_div;
310 unsigned long fck;
311 unsigned long pck;
312 struct dispc_clock_info dispc_cinfo;
313
314 if (dss_mgr_check_timings(mgr, timings))
315 return -EINVAL;
316
317 if (timings->pixel_clock == 0)
318 return -EINVAL;
319
320 if (dpi_use_dsi_pll(dssdev)) {
321 struct dsi_clock_info dsi_cinfo;
322 r = dsi_pll_calc_clock_div_pck(dpi.dsidev,
323 timings->pixel_clock * 1000,
324 &dsi_cinfo, &dispc_cinfo);
325
326 if (r)
327 return r;
328
329 fck = dsi_cinfo.dsi_pll_hsdiv_dispc_clk;
330 } else {
331 struct dss_clock_info dss_cinfo;
332 r = dss_calc_clock_div(timings->pixel_clock * 1000,
333 &dss_cinfo, &dispc_cinfo);
334
335 if (r)
336 return r;
337
338 fck = dss_cinfo.fck;
339 }
340
341 lck_div = dispc_cinfo.lck_div;
342 pck_div = dispc_cinfo.pck_div;
343
344 pck = fck / lck_div / pck_div / 1000;
345
346 timings->pixel_clock = pck;
347
348 return 0;
349}
350EXPORT_SYMBOL(dpi_check_timings);
351
352void omapdss_dpi_set_data_lines(struct omap_dss_device *dssdev, int data_lines)
353{
354 mutex_lock(&dpi.lock);
355
356 dpi.data_lines = data_lines;
357
358 mutex_unlock(&dpi.lock);
359}
360EXPORT_SYMBOL(omapdss_dpi_set_data_lines);
361
362static int __init dpi_init_display(struct omap_dss_device *dssdev)
363{
364 DSSDBG("init_display\n");
365
366 if (dss_has_feature(FEAT_DPI_USES_VDDS_DSI) &&
367 dpi.vdds_dsi_reg == NULL) {
368 struct regulator *vdds_dsi;
369
370 vdds_dsi = dss_get_vdds_dsi();
371
372 if (IS_ERR(vdds_dsi)) {
373 DSSERR("can't get VDDS_DSI regulator\n");
374 return PTR_ERR(vdds_dsi);
375 }
376
377 dpi.vdds_dsi_reg = vdds_dsi;
378 }
379
380 if (dpi_use_dsi_pll(dssdev)) {
381 enum omap_dss_clk_source dispc_fclk_src =
382 dssdev->clocks.dispc.dispc_fclk_src;
383 dpi.dsidev = dpi_get_dsidev(dispc_fclk_src);
384 }
385
386 return 0;
387}
388
389static struct omap_dss_device * __init dpi_find_dssdev(struct platform_device *pdev)
390{
391 struct omap_dss_board_info *pdata = pdev->dev.platform_data;
392 const char *def_disp_name = dss_get_default_display_name();
393 struct omap_dss_device *def_dssdev;
394 int i;
395
396 def_dssdev = NULL;
397
398 for (i = 0; i < pdata->num_devices; ++i) {
399 struct omap_dss_device *dssdev = pdata->devices[i];
400
401 if (dssdev->type != OMAP_DISPLAY_TYPE_DPI)
402 continue;
403
404 if (def_dssdev == NULL)
405 def_dssdev = dssdev;
406
407 if (def_disp_name != NULL &&
408 strcmp(dssdev->name, def_disp_name) == 0) {
409 def_dssdev = dssdev;
410 break;
411 }
412 }
413
414 return def_dssdev;
415}
416
417static void __init dpi_probe_pdata(struct platform_device *dpidev)
418{
419 struct omap_dss_device *plat_dssdev;
420 struct omap_dss_device *dssdev;
421 int r;
422
423 plat_dssdev = dpi_find_dssdev(dpidev);
424
425 if (!plat_dssdev)
426 return;
427
428 dssdev = dss_alloc_and_init_device(&dpidev->dev);
429 if (!dssdev)
430 return;
431
432 dss_copy_device_pdata(dssdev, plat_dssdev);
433
434 r = dpi_init_display(dssdev);
435 if (r) {
436 DSSERR("device %s init failed: %d\n", dssdev->name, r);
437 dss_put_device(dssdev);
438 return;
439 }
440
441 r = dss_add_device(dssdev);
442 if (r) {
443 DSSERR("device %s register failed: %d\n", dssdev->name, r);
444 dss_put_device(dssdev);
445 return;
446 }
447}
448
449static void __init dpi_init_output(struct platform_device *pdev)
450{
451 struct omap_dss_output *out = &dpi.output;
452
453 out->pdev = pdev;
454 out->id = OMAP_DSS_OUTPUT_DPI;
455 out->type = OMAP_DISPLAY_TYPE_DPI;
456
457 dss_register_output(out);
458}
459
460static void __exit dpi_uninit_output(struct platform_device *pdev)
461{
462 struct omap_dss_output *out = &dpi.output;
463
464 dss_unregister_output(out);
465}
466
467static int __init omap_dpi_probe(struct platform_device *pdev)
468{
469 mutex_init(&dpi.lock);
470
471 dpi_init_output(pdev);
472
473 dpi_probe_pdata(pdev);
474
475 return 0;
476}
477
478static int __exit omap_dpi_remove(struct platform_device *pdev)
479{
480 dss_unregister_child_devices(&pdev->dev);
481
482 dpi_uninit_output(pdev);
483
484 return 0;
485}
486
487static struct platform_driver omap_dpi_driver = {
488 .remove = __exit_p(omap_dpi_remove),
489 .driver = {
490 .name = "omapdss_dpi",
491 .owner = THIS_MODULE,
492 },
493};
494
495int __init dpi_init_platform_driver(void)
496{
497 return platform_driver_probe(&omap_dpi_driver, omap_dpi_probe);
498}
499
500void __exit dpi_uninit_platform_driver(void)
501{
502 platform_driver_unregister(&omap_dpi_driver);
503}
504
