3 * Copyright (C) 2012 Samsung Electronics Co.Ltd
5 * Inki Dae <inki.dae@samsung.com>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
15 #include <linux/kernel.h>
16 #include <linux/platform_device.h>
18 #include <drm/exynos_drm.h>
20 #include <drm/drm_edid.h>
21 #include <drm/drm_crtc_helper.h>
23 #include "exynos_drm_drv.h"
24 #include "exynos_drm_crtc.h"
25 #include "exynos_drm_encoder.h"
26 #include "exynos_drm_vidi.h"
28 /* vidi has totally three virtual windows. */
31 #define get_vidi_context(dev) platform_get_drvdata(to_platform_device(dev))
33 struct vidi_win_data
{
34 unsigned int offset_x
;
35 unsigned int offset_y
;
36 unsigned int ovl_width
;
37 unsigned int ovl_height
;
38 unsigned int fb_width
;
39 unsigned int fb_height
;
42 unsigned int buf_offsize
;
43 unsigned int line_size
; /* bytes */
48 struct exynos_drm_subdrv subdrv
;
49 struct drm_crtc
*crtc
;
50 struct vidi_win_data win_data
[WINDOWS_NR
];
51 struct edid
*raw_edid
;
53 unsigned int default_win
;
54 unsigned long irq_flags
;
55 unsigned int connected
;
59 struct work_struct work
;
63 static const char fake_edid_info
[] = {
64 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05,
65 0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78,
66 0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd,
67 0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
68 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00,
69 0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e,
70 0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00,
71 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18,
72 0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
73 0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47,
74 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1,
75 0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83,
76 0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00,
77 0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c,
78 0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a,
79 0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00,
80 0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c,
81 0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0x00,
82 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
83 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
84 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
85 0x00, 0x00, 0x00, 0x06
88 static bool vidi_display_is_connected(struct device
*dev
)
90 struct vidi_context
*ctx
= get_vidi_context(dev
);
93 * connection request would come from user side
94 * to do hotplug through specific ioctl.
96 return ctx
->connected
? true : false;
99 static struct edid
*vidi_get_edid(struct device
*dev
,
100 struct drm_connector
*connector
)
102 struct vidi_context
*ctx
= get_vidi_context(dev
);
106 * the edid data comes from user side and it would be set
107 * to ctx->raw_edid through specific ioctl.
109 if (!ctx
->raw_edid
) {
110 DRM_DEBUG_KMS("raw_edid is null.\n");
111 return ERR_PTR(-EFAULT
);
114 edid
= drm_edid_duplicate(ctx
->raw_edid
);
116 DRM_DEBUG_KMS("failed to allocate edid\n");
117 return ERR_PTR(-ENOMEM
);
123 static void *vidi_get_panel(struct device
*dev
)
130 static int vidi_check_mode(struct device
*dev
, struct drm_display_mode
*mode
)
137 static int vidi_display_power_on(struct device
*dev
, int mode
)
144 static struct exynos_drm_display_ops vidi_display_ops
= {
145 .type
= EXYNOS_DISPLAY_TYPE_VIDI
,
146 .is_connected
= vidi_display_is_connected
,
147 .get_edid
= vidi_get_edid
,
148 .get_panel
= vidi_get_panel
,
149 .check_mode
= vidi_check_mode
,
150 .power_on
= vidi_display_power_on
,
153 static void vidi_dpms(struct device
*subdrv_dev
, int mode
)
155 struct vidi_context
*ctx
= get_vidi_context(subdrv_dev
);
157 DRM_DEBUG_KMS("%d\n", mode
);
159 mutex_lock(&ctx
->lock
);
162 case DRM_MODE_DPMS_ON
:
165 case DRM_MODE_DPMS_STANDBY
:
166 case DRM_MODE_DPMS_SUSPEND
:
167 case DRM_MODE_DPMS_OFF
:
171 DRM_DEBUG_KMS("unspecified mode %d\n", mode
);
175 mutex_unlock(&ctx
->lock
);
178 static void vidi_apply(struct device
*subdrv_dev
)
180 struct vidi_context
*ctx
= get_vidi_context(subdrv_dev
);
181 struct exynos_drm_manager
*mgr
= ctx
->subdrv
.manager
;
182 struct exynos_drm_manager_ops
*mgr_ops
= mgr
->ops
;
183 struct exynos_drm_overlay_ops
*ovl_ops
= mgr
->overlay_ops
;
184 struct vidi_win_data
*win_data
;
187 for (i
= 0; i
< WINDOWS_NR
; i
++) {
188 win_data
= &ctx
->win_data
[i
];
189 if (win_data
->enabled
&& (ovl_ops
&& ovl_ops
->commit
))
190 ovl_ops
->commit(subdrv_dev
, i
);
193 if (mgr_ops
&& mgr_ops
->commit
)
194 mgr_ops
->commit(subdrv_dev
);
197 static void vidi_commit(struct device
*dev
)
199 struct vidi_context
*ctx
= get_vidi_context(dev
);
205 static int vidi_enable_vblank(struct device
*dev
)
207 struct vidi_context
*ctx
= get_vidi_context(dev
);
212 if (!test_and_set_bit(0, &ctx
->irq_flags
))
213 ctx
->vblank_on
= true;
215 ctx
->direct_vblank
= true;
218 * in case of page flip request, vidi_finish_pageflip function
219 * will not be called because direct_vblank is true and then
220 * that function will be called by overlay_ops->commit callback
222 schedule_work(&ctx
->work
);
227 static void vidi_disable_vblank(struct device
*dev
)
229 struct vidi_context
*ctx
= get_vidi_context(dev
);
234 if (test_and_clear_bit(0, &ctx
->irq_flags
))
235 ctx
->vblank_on
= false;
238 static struct exynos_drm_manager_ops vidi_manager_ops
= {
241 .commit
= vidi_commit
,
242 .enable_vblank
= vidi_enable_vblank
,
243 .disable_vblank
= vidi_disable_vblank
,
246 static void vidi_win_mode_set(struct device
*dev
,
247 struct exynos_drm_overlay
*overlay
)
249 struct vidi_context
*ctx
= get_vidi_context(dev
);
250 struct vidi_win_data
*win_data
;
252 unsigned long offset
;
255 dev_err(dev
, "overlay is NULL\n");
260 if (win
== DEFAULT_ZPOS
)
261 win
= ctx
->default_win
;
263 if (win
< 0 || win
>= WINDOWS_NR
)
266 offset
= overlay
->fb_x
* (overlay
->bpp
>> 3);
267 offset
+= overlay
->fb_y
* overlay
->pitch
;
269 DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset
, overlay
->pitch
);
271 win_data
= &ctx
->win_data
[win
];
273 win_data
->offset_x
= overlay
->crtc_x
;
274 win_data
->offset_y
= overlay
->crtc_y
;
275 win_data
->ovl_width
= overlay
->crtc_width
;
276 win_data
->ovl_height
= overlay
->crtc_height
;
277 win_data
->fb_width
= overlay
->fb_width
;
278 win_data
->fb_height
= overlay
->fb_height
;
279 win_data
->dma_addr
= overlay
->dma_addr
[0] + offset
;
280 win_data
->bpp
= overlay
->bpp
;
281 win_data
->buf_offsize
= (overlay
->fb_width
- overlay
->crtc_width
) *
283 win_data
->line_size
= overlay
->crtc_width
* (overlay
->bpp
>> 3);
286 * some parts of win_data should be transferred to user side
287 * through specific ioctl.
290 DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n",
291 win_data
->offset_x
, win_data
->offset_y
);
292 DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
293 win_data
->ovl_width
, win_data
->ovl_height
);
294 DRM_DEBUG_KMS("paddr = 0x%lx\n", (unsigned long)win_data
->dma_addr
);
295 DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n",
296 overlay
->fb_width
, overlay
->crtc_width
);
299 static void vidi_win_commit(struct device
*dev
, int zpos
)
301 struct vidi_context
*ctx
= get_vidi_context(dev
);
302 struct vidi_win_data
*win_data
;
308 if (win
== DEFAULT_ZPOS
)
309 win
= ctx
->default_win
;
311 if (win
< 0 || win
>= WINDOWS_NR
)
314 win_data
= &ctx
->win_data
[win
];
316 win_data
->enabled
= true;
318 DRM_DEBUG_KMS("dma_addr = 0x%x\n", win_data
->dma_addr
);
321 schedule_work(&ctx
->work
);
324 static void vidi_win_disable(struct device
*dev
, int zpos
)
326 struct vidi_context
*ctx
= get_vidi_context(dev
);
327 struct vidi_win_data
*win_data
;
330 if (win
== DEFAULT_ZPOS
)
331 win
= ctx
->default_win
;
333 if (win
< 0 || win
>= WINDOWS_NR
)
336 win_data
= &ctx
->win_data
[win
];
337 win_data
->enabled
= false;
342 static struct exynos_drm_overlay_ops vidi_overlay_ops
= {
343 .mode_set
= vidi_win_mode_set
,
344 .commit
= vidi_win_commit
,
345 .disable
= vidi_win_disable
,
348 static struct exynos_drm_manager vidi_manager
= {
350 .ops
= &vidi_manager_ops
,
351 .overlay_ops
= &vidi_overlay_ops
,
352 .display_ops
= &vidi_display_ops
,
355 static void vidi_fake_vblank_handler(struct work_struct
*work
)
357 struct vidi_context
*ctx
= container_of(work
, struct vidi_context
,
359 struct exynos_drm_subdrv
*subdrv
= &ctx
->subdrv
;
360 struct exynos_drm_manager
*manager
= subdrv
->manager
;
362 if (manager
->pipe
< 0)
365 /* refresh rate is about 50Hz. */
366 usleep_range(16000, 20000);
368 mutex_lock(&ctx
->lock
);
370 if (ctx
->direct_vblank
) {
371 drm_handle_vblank(subdrv
->drm_dev
, manager
->pipe
);
372 ctx
->direct_vblank
= false;
373 mutex_unlock(&ctx
->lock
);
377 mutex_unlock(&ctx
->lock
);
379 exynos_drm_crtc_finish_pageflip(subdrv
->drm_dev
, manager
->pipe
);
382 static int vidi_subdrv_probe(struct drm_device
*drm_dev
, struct device
*dev
)
385 * enable drm irq mode.
386 * - with irq_enabled = true, we can use the vblank feature.
388 * P.S. note that we wouldn't use drm irq handler but
389 * just specific driver own one instead because
390 * drm framework supports only one irq handler.
392 drm_dev
->irq_enabled
= true;
395 * with vblank_disable_allowed = true, vblank interrupt will be disabled
396 * by drm timer once a current process gives up ownership of
397 * vblank event.(after drm_vblank_put function is called)
399 drm_dev
->vblank_disable_allowed
= true;
404 static void vidi_subdrv_remove(struct drm_device
*drm_dev
, struct device
*dev
)
409 static int vidi_power_on(struct vidi_context
*ctx
, bool enable
)
411 struct exynos_drm_subdrv
*subdrv
= &ctx
->subdrv
;
412 struct device
*dev
= subdrv
->dev
;
415 ctx
->suspended
= false;
417 /* if vblank was enabled status, enable it again. */
418 if (test_and_clear_bit(0, &ctx
->irq_flags
))
419 vidi_enable_vblank(dev
);
423 ctx
->suspended
= true;
429 static int vidi_show_connection(struct device
*dev
,
430 struct device_attribute
*attr
, char *buf
)
433 struct vidi_context
*ctx
= get_vidi_context(dev
);
435 mutex_lock(&ctx
->lock
);
437 rc
= sprintf(buf
, "%d\n", ctx
->connected
);
439 mutex_unlock(&ctx
->lock
);
444 static int vidi_store_connection(struct device
*dev
,
445 struct device_attribute
*attr
,
446 const char *buf
, size_t len
)
448 struct vidi_context
*ctx
= get_vidi_context(dev
);
451 ret
= kstrtoint(buf
, 0, &ctx
->connected
);
455 if (ctx
->connected
> 1)
458 /* use fake edid data for test. */
460 ctx
->raw_edid
= (struct edid
*)fake_edid_info
;
462 /* if raw_edid isn't same as fake data then it can't be tested. */
463 if (ctx
->raw_edid
!= (struct edid
*)fake_edid_info
) {
464 DRM_DEBUG_KMS("edid data is not fake data.\n");
468 DRM_DEBUG_KMS("requested connection.\n");
470 drm_helper_hpd_irq_event(ctx
->subdrv
.drm_dev
);
475 static DEVICE_ATTR(connection
, 0644, vidi_show_connection
,
476 vidi_store_connection
);
478 int vidi_connection_ioctl(struct drm_device
*drm_dev
, void *data
,
479 struct drm_file
*file_priv
)
481 struct vidi_context
*ctx
= NULL
;
482 struct drm_encoder
*encoder
;
483 struct exynos_drm_manager
*manager
;
484 struct exynos_drm_display_ops
*display_ops
;
485 struct drm_exynos_vidi_connection
*vidi
= data
;
488 DRM_DEBUG_KMS("user data for vidi is null.\n");
492 if (vidi
->connection
> 1) {
493 DRM_DEBUG_KMS("connection should be 0 or 1.\n");
497 list_for_each_entry(encoder
, &drm_dev
->mode_config
.encoder_list
,
499 manager
= exynos_drm_get_manager(encoder
);
500 display_ops
= manager
->display_ops
;
502 if (display_ops
->type
== EXYNOS_DISPLAY_TYPE_VIDI
) {
503 ctx
= get_vidi_context(manager
->dev
);
509 DRM_DEBUG_KMS("not found virtual device type encoder.\n");
513 if (ctx
->connected
== vidi
->connection
) {
514 DRM_DEBUG_KMS("same connection request.\n");
518 if (vidi
->connection
) {
519 struct edid
*raw_edid
= (struct edid
*)(uint32_t)vidi
->edid
;
520 if (!drm_edid_is_valid(raw_edid
)) {
521 DRM_DEBUG_KMS("edid data is invalid.\n");
524 ctx
->raw_edid
= drm_edid_duplicate(raw_edid
);
525 if (!ctx
->raw_edid
) {
526 DRM_DEBUG_KMS("failed to allocate raw_edid.\n");
531 * with connection = 0, free raw_edid
532 * only if raw edid data isn't same as fake data.
534 if (ctx
->raw_edid
&& ctx
->raw_edid
!=
535 (struct edid
*)fake_edid_info
) {
536 kfree(ctx
->raw_edid
);
537 ctx
->raw_edid
= NULL
;
541 ctx
->connected
= vidi
->connection
;
542 drm_helper_hpd_irq_event(ctx
->subdrv
.drm_dev
);
547 static int vidi_probe(struct platform_device
*pdev
)
549 struct device
*dev
= &pdev
->dev
;
550 struct vidi_context
*ctx
;
551 struct exynos_drm_subdrv
*subdrv
;
554 ctx
= devm_kzalloc(dev
, sizeof(*ctx
), GFP_KERNEL
);
558 ctx
->default_win
= 0;
560 INIT_WORK(&ctx
->work
, vidi_fake_vblank_handler
);
562 subdrv
= &ctx
->subdrv
;
564 subdrv
->manager
= &vidi_manager
;
565 subdrv
->probe
= vidi_subdrv_probe
;
566 subdrv
->remove
= vidi_subdrv_remove
;
568 mutex_init(&ctx
->lock
);
570 platform_set_drvdata(pdev
, ctx
);
572 ret
= device_create_file(dev
, &dev_attr_connection
);
574 DRM_INFO("failed to create connection sysfs.\n");
576 exynos_drm_subdrv_register(subdrv
);
581 static int vidi_remove(struct platform_device
*pdev
)
583 struct vidi_context
*ctx
= platform_get_drvdata(pdev
);
585 exynos_drm_subdrv_unregister(&ctx
->subdrv
);
587 if (ctx
->raw_edid
!= (struct edid
*)fake_edid_info
) {
588 kfree(ctx
->raw_edid
);
589 ctx
->raw_edid
= NULL
;
595 #ifdef CONFIG_PM_SLEEP
596 static int vidi_suspend(struct device
*dev
)
598 struct vidi_context
*ctx
= get_vidi_context(dev
);
600 return vidi_power_on(ctx
, false);
603 static int vidi_resume(struct device
*dev
)
605 struct vidi_context
*ctx
= get_vidi_context(dev
);
607 return vidi_power_on(ctx
, true);
611 static const struct dev_pm_ops vidi_pm_ops
= {
612 SET_SYSTEM_SLEEP_PM_OPS(vidi_suspend
, vidi_resume
)
615 struct platform_driver vidi_driver
= {
617 .remove
= vidi_remove
,
619 .name
= "exynos-drm-vidi",
620 .owner
= THIS_MODULE
,