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20#include <linux/component.h>
21#include <linux/module.h>
22#include <linux/export.h>
23#include <linux/device.h>
24#include <linux/platform_device.h>
25#include <drm/drmP.h>
26#include <drm/drm_crtc_helper.h>
27#include <linux/fb.h>
28#include <linux/clk.h>
29#include <linux/errno.h>
30#include <drm/drm_gem_cma_helper.h>
31#include <drm/drm_fb_cma_helper.h>
32
33#include <video/imx-ipu-v3.h>
34#include "imx-drm.h"
35#include "ipuv3-plane.h"
36
37#define DRIVER_DESC "i.MX IPUv3 Graphics"
38
39struct ipu_crtc {
40 struct device *dev;
41 struct drm_crtc base;
42 struct imx_drm_crtc *imx_crtc;
43
44
45 struct ipu_plane *plane[2];
46
47 struct ipu_dc *dc;
48 struct ipu_di *di;
49 int enabled;
50 struct drm_pending_vblank_event *page_flip_event;
51 struct drm_framebuffer *newfb;
52 int irq;
53 u32 interface_pix_fmt;
54 unsigned long di_clkflags;
55 int di_hsync_pin;
56 int di_vsync_pin;
57};
58
59#define to_ipu_crtc(x) container_of(x, struct ipu_crtc, base)
60
61static void ipu_fb_enable(struct ipu_crtc *ipu_crtc)
62{
63 struct ipu_soc *ipu = dev_get_drvdata(ipu_crtc->dev->parent);
64
65 if (ipu_crtc->enabled)
66 return;
67
68 ipu_dc_enable(ipu);
69 ipu_plane_enable(ipu_crtc->plane[0]);
70
71 ipu_dc_enable_channel(ipu_crtc->dc);
72 ipu_di_enable(ipu_crtc->di);
73
74 ipu_crtc->enabled = 1;
75}
76
77static void ipu_fb_disable(struct ipu_crtc *ipu_crtc)
78{
79 struct ipu_soc *ipu = dev_get_drvdata(ipu_crtc->dev->parent);
80
81 if (!ipu_crtc->enabled)
82 return;
83
84
85 ipu_dc_disable_channel(ipu_crtc->dc);
86 ipu_di_disable(ipu_crtc->di);
87 ipu_plane_disable(ipu_crtc->plane[0]);
88 ipu_dc_disable(ipu);
89
90 ipu_crtc->enabled = 0;
91}
92
93static void ipu_crtc_dpms(struct drm_crtc *crtc, int mode)
94{
95 struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
96
97 dev_dbg(ipu_crtc->dev, "%s mode: %d\n", __func__, mode);
98
99 switch (mode) {
100 case DRM_MODE_DPMS_ON:
101 ipu_fb_enable(ipu_crtc);
102 break;
103 case DRM_MODE_DPMS_STANDBY:
104 case DRM_MODE_DPMS_SUSPEND:
105 case DRM_MODE_DPMS_OFF:
106 ipu_fb_disable(ipu_crtc);
107 break;
108 }
109}
110
111static int ipu_page_flip(struct drm_crtc *crtc,
112 struct drm_framebuffer *fb,
113 struct drm_pending_vblank_event *event,
114 uint32_t page_flip_flags)
115{
116 struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
117 int ret;
118
119 if (ipu_crtc->newfb)
120 return -EBUSY;
121
122 ret = imx_drm_crtc_vblank_get(ipu_crtc->imx_crtc);
123 if (ret) {
124 dev_dbg(ipu_crtc->dev, "failed to acquire vblank counter\n");
125 list_del(&event->base.link);
126
127 return ret;
128 }
129
130 ipu_crtc->newfb = fb;
131 ipu_crtc->page_flip_event = event;
132 crtc->primary->fb = fb;
133
134 return 0;
135}
136
137static const struct drm_crtc_funcs ipu_crtc_funcs = {
138 .set_config = drm_crtc_helper_set_config,
139 .destroy = drm_crtc_cleanup,
140 .page_flip = ipu_page_flip,
141};
142
143static int ipu_crtc_mode_set(struct drm_crtc *crtc,
144 struct drm_display_mode *orig_mode,
145 struct drm_display_mode *mode,
146 int x, int y,
147 struct drm_framebuffer *old_fb)
148{
149 struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
150 int ret;
151 struct ipu_di_signal_cfg sig_cfg = {};
152 u32 out_pixel_fmt;
153
154 dev_dbg(ipu_crtc->dev, "%s: mode->hdisplay: %d\n", __func__,
155 mode->hdisplay);
156 dev_dbg(ipu_crtc->dev, "%s: mode->vdisplay: %d\n", __func__,
157 mode->vdisplay);
158
159 out_pixel_fmt = ipu_crtc->interface_pix_fmt;
160
161 if (mode->flags & DRM_MODE_FLAG_INTERLACE)
162 sig_cfg.interlaced = 1;
163 if (mode->flags & DRM_MODE_FLAG_PHSYNC)
164 sig_cfg.Hsync_pol = 1;
165 if (mode->flags & DRM_MODE_FLAG_PVSYNC)
166 sig_cfg.Vsync_pol = 1;
167
168 sig_cfg.enable_pol = 1;
169 sig_cfg.clk_pol = 0;
170 sig_cfg.width = mode->hdisplay;
171 sig_cfg.height = mode->vdisplay;
172 sig_cfg.pixel_fmt = out_pixel_fmt;
173 sig_cfg.h_start_width = mode->htotal - mode->hsync_end;
174 sig_cfg.h_sync_width = mode->hsync_end - mode->hsync_start;
175 sig_cfg.h_end_width = mode->hsync_start - mode->hdisplay;
176
177 sig_cfg.v_start_width = mode->vtotal - mode->vsync_end;
178 sig_cfg.v_sync_width = mode->vsync_end - mode->vsync_start;
179 sig_cfg.v_end_width = mode->vsync_start - mode->vdisplay;
180 sig_cfg.pixelclock = mode->clock * 1000;
181 sig_cfg.clkflags = ipu_crtc->di_clkflags;
182
183 sig_cfg.v_to_h_sync = 0;
184
185 sig_cfg.hsync_pin = ipu_crtc->di_hsync_pin;
186 sig_cfg.vsync_pin = ipu_crtc->di_vsync_pin;
187
188 ret = ipu_dc_init_sync(ipu_crtc->dc, ipu_crtc->di, sig_cfg.interlaced,
189 out_pixel_fmt, mode->hdisplay);
190 if (ret) {
191 dev_err(ipu_crtc->dev,
192 "initializing display controller failed with %d\n",
193 ret);
194 return ret;
195 }
196
197 ret = ipu_di_init_sync_panel(ipu_crtc->di, &sig_cfg);
198 if (ret) {
199 dev_err(ipu_crtc->dev,
200 "initializing panel failed with %d\n", ret);
201 return ret;
202 }
203
204 return ipu_plane_mode_set(ipu_crtc->plane[0], crtc, mode,
205 crtc->primary->fb,
206 0, 0, mode->hdisplay, mode->vdisplay,
207 x, y, mode->hdisplay, mode->vdisplay);
208}
209
210static void ipu_crtc_handle_pageflip(struct ipu_crtc *ipu_crtc)
211{
212 unsigned long flags;
213 struct drm_device *drm = ipu_crtc->base.dev;
214
215 spin_lock_irqsave(&drm->event_lock, flags);
216 if (ipu_crtc->page_flip_event)
217 drm_send_vblank_event(drm, -1, ipu_crtc->page_flip_event);
218 ipu_crtc->page_flip_event = NULL;
219 imx_drm_crtc_vblank_put(ipu_crtc->imx_crtc);
220 spin_unlock_irqrestore(&drm->event_lock, flags);
221}
222
223static irqreturn_t ipu_irq_handler(int irq, void *dev_id)
224{
225 struct ipu_crtc *ipu_crtc = dev_id;
226
227 imx_drm_handle_vblank(ipu_crtc->imx_crtc);
228
229 if (ipu_crtc->newfb) {
230 struct ipu_plane *plane = ipu_crtc->plane[0];
231
232 ipu_crtc->newfb = NULL;
233 ipu_plane_set_base(plane, ipu_crtc->base.primary->fb,
234 plane->x, plane->y);
235 ipu_crtc_handle_pageflip(ipu_crtc);
236 }
237
238 return IRQ_HANDLED;
239}
240
241static bool ipu_crtc_mode_fixup(struct drm_crtc *crtc,
242 const struct drm_display_mode *mode,
243 struct drm_display_mode *adjusted_mode)
244{
245 return true;
246}
247
248static void ipu_crtc_prepare(struct drm_crtc *crtc)
249{
250 struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
251
252 ipu_fb_disable(ipu_crtc);
253}
254
255static void ipu_crtc_commit(struct drm_crtc *crtc)
256{
257 struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
258
259 ipu_fb_enable(ipu_crtc);
260}
261
262static struct drm_crtc_helper_funcs ipu_helper_funcs = {
263 .dpms = ipu_crtc_dpms,
264 .mode_fixup = ipu_crtc_mode_fixup,
265 .mode_set = ipu_crtc_mode_set,
266 .prepare = ipu_crtc_prepare,
267 .commit = ipu_crtc_commit,
268};
269
270static int ipu_enable_vblank(struct drm_crtc *crtc)
271{
272 return 0;
273}
274
275static void ipu_disable_vblank(struct drm_crtc *crtc)
276{
277 struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
278
279 ipu_crtc->page_flip_event = NULL;
280 ipu_crtc->newfb = NULL;
281}
282
283static int ipu_set_interface_pix_fmt(struct drm_crtc *crtc, u32 encoder_type,
284 u32 pixfmt, int hsync_pin, int vsync_pin)
285{
286 struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
287
288 ipu_crtc->interface_pix_fmt = pixfmt;
289 ipu_crtc->di_hsync_pin = hsync_pin;
290 ipu_crtc->di_vsync_pin = vsync_pin;
291
292 switch (encoder_type) {
293 case DRM_MODE_ENCODER_DAC:
294 case DRM_MODE_ENCODER_TVDAC:
295 case DRM_MODE_ENCODER_LVDS:
296 ipu_crtc->di_clkflags = IPU_DI_CLKMODE_SYNC |
297 IPU_DI_CLKMODE_EXT;
298 break;
299 case DRM_MODE_ENCODER_TMDS:
300 case DRM_MODE_ENCODER_NONE:
301 ipu_crtc->di_clkflags = 0;
302 break;
303 }
304
305 return 0;
306}
307
308static const struct imx_drm_crtc_helper_funcs ipu_crtc_helper_funcs = {
309 .enable_vblank = ipu_enable_vblank,
310 .disable_vblank = ipu_disable_vblank,
311 .set_interface_pix_fmt = ipu_set_interface_pix_fmt,
312 .crtc_funcs = &ipu_crtc_funcs,
313 .crtc_helper_funcs = &ipu_helper_funcs,
314};
315
316static void ipu_put_resources(struct ipu_crtc *ipu_crtc)
317{
318 if (!IS_ERR_OR_NULL(ipu_crtc->dc))
319 ipu_dc_put(ipu_crtc->dc);
320 if (!IS_ERR_OR_NULL(ipu_crtc->di))
321 ipu_di_put(ipu_crtc->di);
322}
323
324static int ipu_get_resources(struct ipu_crtc *ipu_crtc,
325 struct ipu_client_platformdata *pdata)
326{
327 struct ipu_soc *ipu = dev_get_drvdata(ipu_crtc->dev->parent);
328 int ret;
329
330 ipu_crtc->dc = ipu_dc_get(ipu, pdata->dc);
331 if (IS_ERR(ipu_crtc->dc)) {
332 ret = PTR_ERR(ipu_crtc->dc);
333 goto err_out;
334 }
335
336 ipu_crtc->di = ipu_di_get(ipu, pdata->di);
337 if (IS_ERR(ipu_crtc->di)) {
338 ret = PTR_ERR(ipu_crtc->di);
339 goto err_out;
340 }
341
342 return 0;
343err_out:
344 ipu_put_resources(ipu_crtc);
345
346 return ret;
347}
348
349static int ipu_crtc_init(struct ipu_crtc *ipu_crtc,
350 struct ipu_client_platformdata *pdata, struct drm_device *drm)
351{
352 struct ipu_soc *ipu = dev_get_drvdata(ipu_crtc->dev->parent);
353 int dp = -EINVAL;
354 int ret;
355 int id;
356
357 ret = ipu_get_resources(ipu_crtc, pdata);
358 if (ret) {
359 dev_err(ipu_crtc->dev, "getting resources failed with %d.\n",
360 ret);
361 return ret;
362 }
363
364 ret = imx_drm_add_crtc(drm, &ipu_crtc->base, &ipu_crtc->imx_crtc,
365 &ipu_crtc_helper_funcs, ipu_crtc->dev->of_node);
366 if (ret) {
367 dev_err(ipu_crtc->dev, "adding crtc failed with %d.\n", ret);
368 goto err_put_resources;
369 }
370
371 if (pdata->dp >= 0)
372 dp = IPU_DP_FLOW_SYNC_BG;
373 id = imx_drm_crtc_id(ipu_crtc->imx_crtc);
374 ipu_crtc->plane[0] = ipu_plane_init(ipu_crtc->base.dev, ipu,
375 pdata->dma[0], dp, BIT(id), true);
376 ret = ipu_plane_get_resources(ipu_crtc->plane[0]);
377 if (ret) {
378 dev_err(ipu_crtc->dev, "getting plane 0 resources failed with %d.\n",
379 ret);
380 goto err_remove_crtc;
381 }
382
383
384 if (pdata->dp >= 0 && pdata->dma[1] > 0) {
385 ipu_crtc->plane[1] = ipu_plane_init(ipu_crtc->base.dev, ipu,
386 pdata->dma[1],
387 IPU_DP_FLOW_SYNC_FG,
388 BIT(id), false);
389 if (IS_ERR(ipu_crtc->plane[1]))
390 ipu_crtc->plane[1] = NULL;
391 }
392
393 ipu_crtc->irq = ipu_plane_irq(ipu_crtc->plane[0]);
394 ret = devm_request_irq(ipu_crtc->dev, ipu_crtc->irq, ipu_irq_handler, 0,
395 "imx_drm", ipu_crtc);
396 if (ret < 0) {
397 dev_err(ipu_crtc->dev, "irq request failed with %d.\n", ret);
398 goto err_put_plane_res;
399 }
400
401 return 0;
402
403err_put_plane_res:
404 ipu_plane_put_resources(ipu_crtc->plane[0]);
405err_remove_crtc:
406 imx_drm_remove_crtc(ipu_crtc->imx_crtc);
407err_put_resources:
408 ipu_put_resources(ipu_crtc);
409
410 return ret;
411}
412
413static struct device_node *ipu_drm_get_port_by_id(struct device_node *parent,
414 int port_id)
415{
416 struct device_node *port;
417 int id, ret;
418
419 port = of_get_child_by_name(parent, "port");
420 while (port) {
421 ret = of_property_read_u32(port, "reg", &id);
422 if (!ret && id == port_id)
423 return port;
424
425 do {
426 port = of_get_next_child(parent, port);
427 if (!port)
428 return NULL;
429 } while (of_node_cmp(port->name, "port"));
430 }
431
432 return NULL;
433}
434
435static int ipu_drm_bind(struct device *dev, struct device *master, void *data)
436{
437 struct ipu_client_platformdata *pdata = dev->platform_data;
438 struct drm_device *drm = data;
439 struct ipu_crtc *ipu_crtc;
440 int ret;
441
442 ipu_crtc = devm_kzalloc(dev, sizeof(*ipu_crtc), GFP_KERNEL);
443 if (!ipu_crtc)
444 return -ENOMEM;
445
446 ipu_crtc->dev = dev;
447
448 ret = ipu_crtc_init(ipu_crtc, pdata, drm);
449 if (ret)
450 return ret;
451
452 dev_set_drvdata(dev, ipu_crtc);
453
454 return 0;
455}
456
457static void ipu_drm_unbind(struct device *dev, struct device *master,
458 void *data)
459{
460 struct ipu_crtc *ipu_crtc = dev_get_drvdata(dev);
461
462 imx_drm_remove_crtc(ipu_crtc->imx_crtc);
463
464 ipu_plane_put_resources(ipu_crtc->plane[0]);
465 ipu_put_resources(ipu_crtc);
466}
467
468static const struct component_ops ipu_crtc_ops = {
469 .bind = ipu_drm_bind,
470 .unbind = ipu_drm_unbind,
471};
472
473static int ipu_drm_probe(struct platform_device *pdev)
474{
475 struct device *dev = &pdev->dev;
476 struct ipu_client_platformdata *pdata = dev->platform_data;
477 int ret;
478
479 if (!dev->platform_data)
480 return -EINVAL;
481
482 if (!dev->of_node) {
483
484 dev->of_node = ipu_drm_get_port_by_id(dev->parent->of_node,
485 pdata->di + 2);
486 if (!dev->of_node) {
487 dev_err(dev, "missing port@%d node in %s\n",
488 pdata->di + 2, dev->parent->of_node->full_name);
489 return -ENODEV;
490 }
491 }
492
493 ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
494 if (ret)
495 return ret;
496
497 return component_add(dev, &ipu_crtc_ops);
498}
499
500static int ipu_drm_remove(struct platform_device *pdev)
501{
502 component_del(&pdev->dev, &ipu_crtc_ops);
503 return 0;
504}
505
506static struct platform_driver ipu_drm_driver = {
507 .driver = {
508 .name = "imx-ipuv3-crtc",
509 },
510 .probe = ipu_drm_probe,
511 .remove = ipu_drm_remove,
512};
513module_platform_driver(ipu_drm_driver);
514
515MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
516MODULE_DESCRIPTION(DRIVER_DESC);
517MODULE_LICENSE("GPL");
518MODULE_ALIAS("platform:imx-ipuv3-crtc");
519
