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/module.h>
17 #include <linux/platform_device.h>
19 #include <drm/exynos_drm.h>
21 #include <drm/drm_edid.h>
22 #include <drm/drm_crtc_helper.h>
24 #include "exynos_drm_drv.h"
25 #include "exynos_drm_crtc.h"
26 #include "exynos_drm_encoder.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
);
92 DRM_DEBUG_KMS("%s\n", __FILE__
);
95 * connection request would come from user side
96 * to do hotplug through specific ioctl.
98 return ctx
->connected
? true : false;
101 static struct edid
*vidi_get_edid(struct device
*dev
,
102 struct drm_connector
*connector
)
104 struct vidi_context
*ctx
= get_vidi_context(dev
);
108 DRM_DEBUG_KMS("%s\n", __FILE__
);
111 * the edid data comes from user side and it would be set
112 * to ctx->raw_edid through specific ioctl.
114 if (!ctx
->raw_edid
) {
115 DRM_DEBUG_KMS("raw_edid is null.\n");
116 return ERR_PTR(-EFAULT
);
119 edid_len
= (1 + ctx
->raw_edid
->extensions
) * EDID_LENGTH
;
120 edid
= kzalloc(edid_len
, GFP_KERNEL
);
122 DRM_DEBUG_KMS("failed to allocate edid\n");
123 return ERR_PTR(-ENOMEM
);
126 memcpy(edid
, ctx
->raw_edid
, edid_len
);
130 static void *vidi_get_panel(struct device
*dev
)
132 DRM_DEBUG_KMS("%s\n", __FILE__
);
139 static int vidi_check_timing(struct device
*dev
, void *timing
)
141 DRM_DEBUG_KMS("%s\n", __FILE__
);
148 static int vidi_display_power_on(struct device
*dev
, int mode
)
150 DRM_DEBUG_KMS("%s\n", __FILE__
);
157 static struct exynos_drm_display_ops vidi_display_ops
= {
158 .type
= EXYNOS_DISPLAY_TYPE_VIDI
,
159 .is_connected
= vidi_display_is_connected
,
160 .get_edid
= vidi_get_edid
,
161 .get_panel
= vidi_get_panel
,
162 .check_timing
= vidi_check_timing
,
163 .power_on
= vidi_display_power_on
,
166 static void vidi_dpms(struct device
*subdrv_dev
, int mode
)
168 struct vidi_context
*ctx
= get_vidi_context(subdrv_dev
);
170 DRM_DEBUG_KMS("%s, %d\n", __FILE__
, mode
);
172 mutex_lock(&ctx
->lock
);
175 case DRM_MODE_DPMS_ON
:
178 case DRM_MODE_DPMS_STANDBY
:
179 case DRM_MODE_DPMS_SUSPEND
:
180 case DRM_MODE_DPMS_OFF
:
184 DRM_DEBUG_KMS("unspecified mode %d\n", mode
);
188 mutex_unlock(&ctx
->lock
);
191 static void vidi_apply(struct device
*subdrv_dev
)
193 struct vidi_context
*ctx
= get_vidi_context(subdrv_dev
);
194 struct exynos_drm_manager
*mgr
= ctx
->subdrv
.manager
;
195 struct exynos_drm_manager_ops
*mgr_ops
= mgr
->ops
;
196 struct exynos_drm_overlay_ops
*ovl_ops
= mgr
->overlay_ops
;
197 struct vidi_win_data
*win_data
;
200 DRM_DEBUG_KMS("%s\n", __FILE__
);
202 for (i
= 0; i
< WINDOWS_NR
; i
++) {
203 win_data
= &ctx
->win_data
[i
];
204 if (win_data
->enabled
&& (ovl_ops
&& ovl_ops
->commit
))
205 ovl_ops
->commit(subdrv_dev
, i
);
208 if (mgr_ops
&& mgr_ops
->commit
)
209 mgr_ops
->commit(subdrv_dev
);
212 static void vidi_commit(struct device
*dev
)
214 struct vidi_context
*ctx
= get_vidi_context(dev
);
216 DRM_DEBUG_KMS("%s\n", __FILE__
);
222 static int vidi_enable_vblank(struct device
*dev
)
224 struct vidi_context
*ctx
= get_vidi_context(dev
);
226 DRM_DEBUG_KMS("%s\n", __FILE__
);
231 if (!test_and_set_bit(0, &ctx
->irq_flags
))
232 ctx
->vblank_on
= true;
234 ctx
->direct_vblank
= true;
237 * in case of page flip request, vidi_finish_pageflip function
238 * will not be called because direct_vblank is true and then
239 * that function will be called by overlay_ops->commit callback
241 schedule_work(&ctx
->work
);
246 static void vidi_disable_vblank(struct device
*dev
)
248 struct vidi_context
*ctx
= get_vidi_context(dev
);
250 DRM_DEBUG_KMS("%s\n", __FILE__
);
255 if (test_and_clear_bit(0, &ctx
->irq_flags
))
256 ctx
->vblank_on
= false;
259 static struct exynos_drm_manager_ops vidi_manager_ops
= {
262 .commit
= vidi_commit
,
263 .enable_vblank
= vidi_enable_vblank
,
264 .disable_vblank
= vidi_disable_vblank
,
267 static void vidi_win_mode_set(struct device
*dev
,
268 struct exynos_drm_overlay
*overlay
)
270 struct vidi_context
*ctx
= get_vidi_context(dev
);
271 struct vidi_win_data
*win_data
;
273 unsigned long offset
;
275 DRM_DEBUG_KMS("%s\n", __FILE__
);
278 dev_err(dev
, "overlay is NULL\n");
283 if (win
== DEFAULT_ZPOS
)
284 win
= ctx
->default_win
;
286 if (win
< 0 || win
> WINDOWS_NR
)
289 offset
= overlay
->fb_x
* (overlay
->bpp
>> 3);
290 offset
+= overlay
->fb_y
* overlay
->pitch
;
292 DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset
, overlay
->pitch
);
294 win_data
= &ctx
->win_data
[win
];
296 win_data
->offset_x
= overlay
->crtc_x
;
297 win_data
->offset_y
= overlay
->crtc_y
;
298 win_data
->ovl_width
= overlay
->crtc_width
;
299 win_data
->ovl_height
= overlay
->crtc_height
;
300 win_data
->fb_width
= overlay
->fb_width
;
301 win_data
->fb_height
= overlay
->fb_height
;
302 win_data
->dma_addr
= overlay
->dma_addr
[0] + offset
;
303 win_data
->bpp
= overlay
->bpp
;
304 win_data
->buf_offsize
= (overlay
->fb_width
- overlay
->crtc_width
) *
306 win_data
->line_size
= overlay
->crtc_width
* (overlay
->bpp
>> 3);
309 * some parts of win_data should be transferred to user side
310 * through specific ioctl.
313 DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n",
314 win_data
->offset_x
, win_data
->offset_y
);
315 DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
316 win_data
->ovl_width
, win_data
->ovl_height
);
317 DRM_DEBUG_KMS("paddr = 0x%lx\n", (unsigned long)win_data
->dma_addr
);
318 DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n",
319 overlay
->fb_width
, overlay
->crtc_width
);
322 static void vidi_win_commit(struct device
*dev
, int zpos
)
324 struct vidi_context
*ctx
= get_vidi_context(dev
);
325 struct vidi_win_data
*win_data
;
328 DRM_DEBUG_KMS("%s\n", __FILE__
);
333 if (win
== DEFAULT_ZPOS
)
334 win
= ctx
->default_win
;
336 if (win
< 0 || win
> WINDOWS_NR
)
339 win_data
= &ctx
->win_data
[win
];
341 win_data
->enabled
= true;
343 DRM_DEBUG_KMS("dma_addr = 0x%x\n", win_data
->dma_addr
);
346 schedule_work(&ctx
->work
);
349 static void vidi_win_disable(struct device
*dev
, int zpos
)
351 struct vidi_context
*ctx
= get_vidi_context(dev
);
352 struct vidi_win_data
*win_data
;
355 DRM_DEBUG_KMS("%s\n", __FILE__
);
357 if (win
== DEFAULT_ZPOS
)
358 win
= ctx
->default_win
;
360 if (win
< 0 || win
> WINDOWS_NR
)
363 win_data
= &ctx
->win_data
[win
];
364 win_data
->enabled
= false;
369 static struct exynos_drm_overlay_ops vidi_overlay_ops
= {
370 .mode_set
= vidi_win_mode_set
,
371 .commit
= vidi_win_commit
,
372 .disable
= vidi_win_disable
,
375 static struct exynos_drm_manager vidi_manager
= {
377 .ops
= &vidi_manager_ops
,
378 .overlay_ops
= &vidi_overlay_ops
,
379 .display_ops
= &vidi_display_ops
,
382 static void vidi_fake_vblank_handler(struct work_struct
*work
)
384 struct vidi_context
*ctx
= container_of(work
, struct vidi_context
,
386 struct exynos_drm_subdrv
*subdrv
= &ctx
->subdrv
;
387 struct exynos_drm_manager
*manager
= subdrv
->manager
;
389 if (manager
->pipe
< 0)
392 /* refresh rate is about 50Hz. */
393 usleep_range(16000, 20000);
395 mutex_lock(&ctx
->lock
);
397 if (ctx
->direct_vblank
) {
398 drm_handle_vblank(subdrv
->drm_dev
, manager
->pipe
);
399 ctx
->direct_vblank
= false;
400 mutex_unlock(&ctx
->lock
);
404 mutex_unlock(&ctx
->lock
);
406 exynos_drm_crtc_finish_pageflip(subdrv
->drm_dev
, manager
->pipe
);
409 static int vidi_subdrv_probe(struct drm_device
*drm_dev
, struct device
*dev
)
411 DRM_DEBUG_KMS("%s\n", __FILE__
);
414 * enable drm irq mode.
415 * - with irq_enabled = 1, we can use the vblank feature.
417 * P.S. note that we wouldn't use drm irq handler but
418 * just specific driver own one instead because
419 * drm framework supports only one irq handler.
421 drm_dev
->irq_enabled
= 1;
424 * with vblank_disable_allowed = 1, vblank interrupt will be disabled
425 * by drm timer once a current process gives up ownership of
426 * vblank event.(after drm_vblank_put function is called)
428 drm_dev
->vblank_disable_allowed
= 1;
433 static void vidi_subdrv_remove(struct drm_device
*drm_dev
, struct device
*dev
)
435 DRM_DEBUG_KMS("%s\n", __FILE__
);
440 static int vidi_power_on(struct vidi_context
*ctx
, bool enable
)
442 struct exynos_drm_subdrv
*subdrv
= &ctx
->subdrv
;
443 struct device
*dev
= subdrv
->dev
;
445 DRM_DEBUG_KMS("%s\n", __FILE__
);
447 if (enable
!= false && enable
!= true)
451 ctx
->suspended
= false;
453 /* if vblank was enabled status, enable it again. */
454 if (test_and_clear_bit(0, &ctx
->irq_flags
))
455 vidi_enable_vblank(dev
);
459 ctx
->suspended
= true;
465 static int vidi_show_connection(struct device
*dev
,
466 struct device_attribute
*attr
, char *buf
)
469 struct vidi_context
*ctx
= get_vidi_context(dev
);
471 mutex_lock(&ctx
->lock
);
473 rc
= sprintf(buf
, "%d\n", ctx
->connected
);
475 mutex_unlock(&ctx
->lock
);
480 static int vidi_store_connection(struct device
*dev
,
481 struct device_attribute
*attr
,
482 const char *buf
, size_t len
)
484 struct vidi_context
*ctx
= get_vidi_context(dev
);
487 DRM_DEBUG_KMS("%s\n", __FILE__
);
489 ret
= kstrtoint(buf
, 0, &ctx
->connected
);
493 if (ctx
->connected
> 1)
496 /* use fake edid data for test. */
498 ctx
->raw_edid
= (struct edid
*)fake_edid_info
;
500 /* if raw_edid isn't same as fake data then it can't be tested. */
501 if (ctx
->raw_edid
!= (struct edid
*)fake_edid_info
) {
502 DRM_DEBUG_KMS("edid data is not fake data.\n");
506 DRM_DEBUG_KMS("requested connection.\n");
508 drm_helper_hpd_irq_event(ctx
->subdrv
.drm_dev
);
513 static DEVICE_ATTR(connection
, 0644, vidi_show_connection
,
514 vidi_store_connection
);
516 int vidi_connection_ioctl(struct drm_device
*drm_dev
, void *data
,
517 struct drm_file
*file_priv
)
519 struct vidi_context
*ctx
= NULL
;
520 struct drm_encoder
*encoder
;
521 struct exynos_drm_manager
*manager
;
522 struct exynos_drm_display_ops
*display_ops
;
523 struct drm_exynos_vidi_connection
*vidi
= data
;
526 DRM_DEBUG_KMS("%s\n", __FILE__
);
529 DRM_DEBUG_KMS("user data for vidi is null.\n");
533 if (vidi
->connection
> 1) {
534 DRM_DEBUG_KMS("connection should be 0 or 1.\n");
538 list_for_each_entry(encoder
, &drm_dev
->mode_config
.encoder_list
,
540 manager
= exynos_drm_get_manager(encoder
);
541 display_ops
= manager
->display_ops
;
543 if (display_ops
->type
== EXYNOS_DISPLAY_TYPE_VIDI
) {
544 ctx
= get_vidi_context(manager
->dev
);
550 DRM_DEBUG_KMS("not found virtual device type encoder.\n");
554 if (ctx
->connected
== vidi
->connection
) {
555 DRM_DEBUG_KMS("same connection request.\n");
559 if (vidi
->connection
) {
560 struct edid
*raw_edid
= (struct edid
*)(uint32_t)vidi
->edid
;
561 if (!drm_edid_is_valid(raw_edid
)) {
562 DRM_DEBUG_KMS("edid data is invalid.\n");
565 edid_len
= (1 + raw_edid
->extensions
) * EDID_LENGTH
;
566 ctx
->raw_edid
= kzalloc(edid_len
, GFP_KERNEL
);
567 if (!ctx
->raw_edid
) {
568 DRM_DEBUG_KMS("failed to allocate raw_edid.\n");
571 memcpy(ctx
->raw_edid
, raw_edid
, edid_len
);
574 * with connection = 0, free raw_edid
575 * only if raw edid data isn't same as fake data.
577 if (ctx
->raw_edid
&& ctx
->raw_edid
!=
578 (struct edid
*)fake_edid_info
) {
579 kfree(ctx
->raw_edid
);
580 ctx
->raw_edid
= NULL
;
584 ctx
->connected
= vidi
->connection
;
585 drm_helper_hpd_irq_event(ctx
->subdrv
.drm_dev
);
590 static int vidi_probe(struct platform_device
*pdev
)
592 struct device
*dev
= &pdev
->dev
;
593 struct vidi_context
*ctx
;
594 struct exynos_drm_subdrv
*subdrv
;
597 DRM_DEBUG_KMS("%s\n", __FILE__
);
599 ctx
= devm_kzalloc(&pdev
->dev
, sizeof(*ctx
), GFP_KERNEL
);
603 ctx
->default_win
= 0;
605 INIT_WORK(&ctx
->work
, vidi_fake_vblank_handler
);
607 subdrv
= &ctx
->subdrv
;
609 subdrv
->manager
= &vidi_manager
;
610 subdrv
->probe
= vidi_subdrv_probe
;
611 subdrv
->remove
= vidi_subdrv_remove
;
613 mutex_init(&ctx
->lock
);
615 platform_set_drvdata(pdev
, ctx
);
617 ret
= device_create_file(&pdev
->dev
, &dev_attr_connection
);
619 DRM_INFO("failed to create connection sysfs.\n");
621 exynos_drm_subdrv_register(subdrv
);
626 static int vidi_remove(struct platform_device
*pdev
)
628 struct vidi_context
*ctx
= platform_get_drvdata(pdev
);
630 DRM_DEBUG_KMS("%s\n", __FILE__
);
632 exynos_drm_subdrv_unregister(&ctx
->subdrv
);
634 if (ctx
->raw_edid
!= (struct edid
*)fake_edid_info
) {
635 kfree(ctx
->raw_edid
);
636 ctx
->raw_edid
= NULL
;
642 #ifdef CONFIG_PM_SLEEP
643 static int vidi_suspend(struct device
*dev
)
645 struct vidi_context
*ctx
= get_vidi_context(dev
);
647 return vidi_power_on(ctx
, false);
650 static int vidi_resume(struct device
*dev
)
652 struct vidi_context
*ctx
= get_vidi_context(dev
);
654 return vidi_power_on(ctx
, true);
658 static const struct dev_pm_ops vidi_pm_ops
= {
659 SET_SYSTEM_SLEEP_PM_OPS(vidi_suspend
, vidi_resume
)
662 struct platform_driver vidi_driver
= {
664 .remove
= vidi_remove
,
666 .name
= "exynos-drm-vidi",
667 .owner
= THIS_MODULE
,