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_mgr(dev) platform_get_drvdata(to_platform_device(dev))
32 #define ctx_from_connector(c) container_of(c, struct vidi_context, \
35 struct vidi_win_data
{
36 unsigned int offset_x
;
37 unsigned int offset_y
;
38 unsigned int ovl_width
;
39 unsigned int ovl_height
;
40 unsigned int fb_width
;
41 unsigned int fb_height
;
44 unsigned int buf_offsize
;
45 unsigned int line_size
; /* bytes */
50 struct drm_device
*drm_dev
;
51 struct drm_crtc
*crtc
;
52 struct drm_encoder
*encoder
;
53 struct drm_connector connector
;
54 struct exynos_drm_subdrv subdrv
;
55 struct vidi_win_data win_data
[WINDOWS_NR
];
56 struct edid
*raw_edid
;
58 unsigned int default_win
;
59 unsigned long irq_flags
;
60 unsigned int connected
;
64 struct work_struct work
;
69 static const char fake_edid_info
[] = {
70 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05,
71 0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78,
72 0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd,
73 0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
74 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00,
75 0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e,
76 0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00,
77 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18,
78 0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
79 0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47,
80 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1,
81 0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83,
82 0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00,
83 0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c,
84 0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a,
85 0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00,
86 0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c,
87 0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0x00,
88 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
89 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
90 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
91 0x00, 0x00, 0x00, 0x06
94 static void vidi_apply(struct exynos_drm_manager
*mgr
)
96 struct vidi_context
*ctx
= mgr
->ctx
;
97 struct exynos_drm_manager_ops
*mgr_ops
= mgr
->ops
;
98 struct vidi_win_data
*win_data
;
101 for (i
= 0; i
< WINDOWS_NR
; i
++) {
102 win_data
= &ctx
->win_data
[i
];
103 if (win_data
->enabled
&& (mgr_ops
&& mgr_ops
->win_commit
))
104 mgr_ops
->win_commit(mgr
, i
);
107 if (mgr_ops
&& mgr_ops
->commit
)
108 mgr_ops
->commit(mgr
);
111 static void vidi_commit(struct exynos_drm_manager
*mgr
)
113 struct vidi_context
*ctx
= mgr
->ctx
;
119 static int vidi_enable_vblank(struct exynos_drm_manager
*mgr
)
121 struct vidi_context
*ctx
= mgr
->ctx
;
126 if (!test_and_set_bit(0, &ctx
->irq_flags
))
127 ctx
->vblank_on
= true;
129 ctx
->direct_vblank
= true;
132 * in case of page flip request, vidi_finish_pageflip function
133 * will not be called because direct_vblank is true and then
134 * that function will be called by manager_ops->win_commit callback
136 schedule_work(&ctx
->work
);
141 static void vidi_disable_vblank(struct exynos_drm_manager
*mgr
)
143 struct vidi_context
*ctx
= mgr
->ctx
;
148 if (test_and_clear_bit(0, &ctx
->irq_flags
))
149 ctx
->vblank_on
= false;
152 static void vidi_win_mode_set(struct exynos_drm_manager
*mgr
,
153 struct exynos_drm_overlay
*overlay
)
155 struct vidi_context
*ctx
= mgr
->ctx
;
156 struct vidi_win_data
*win_data
;
158 unsigned long offset
;
161 DRM_ERROR("overlay is NULL\n");
166 if (win
== DEFAULT_ZPOS
)
167 win
= ctx
->default_win
;
169 if (win
< 0 || win
>= WINDOWS_NR
)
172 offset
= overlay
->fb_x
* (overlay
->bpp
>> 3);
173 offset
+= overlay
->fb_y
* overlay
->pitch
;
175 DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset
, overlay
->pitch
);
177 win_data
= &ctx
->win_data
[win
];
179 win_data
->offset_x
= overlay
->crtc_x
;
180 win_data
->offset_y
= overlay
->crtc_y
;
181 win_data
->ovl_width
= overlay
->crtc_width
;
182 win_data
->ovl_height
= overlay
->crtc_height
;
183 win_data
->fb_width
= overlay
->fb_width
;
184 win_data
->fb_height
= overlay
->fb_height
;
185 win_data
->dma_addr
= overlay
->dma_addr
[0] + offset
;
186 win_data
->bpp
= overlay
->bpp
;
187 win_data
->buf_offsize
= (overlay
->fb_width
- overlay
->crtc_width
) *
189 win_data
->line_size
= overlay
->crtc_width
* (overlay
->bpp
>> 3);
192 * some parts of win_data should be transferred to user side
193 * through specific ioctl.
196 DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n",
197 win_data
->offset_x
, win_data
->offset_y
);
198 DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
199 win_data
->ovl_width
, win_data
->ovl_height
);
200 DRM_DEBUG_KMS("paddr = 0x%lx\n", (unsigned long)win_data
->dma_addr
);
201 DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n",
202 overlay
->fb_width
, overlay
->crtc_width
);
205 static void vidi_win_commit(struct exynos_drm_manager
*mgr
, int zpos
)
207 struct vidi_context
*ctx
= mgr
->ctx
;
208 struct vidi_win_data
*win_data
;
214 if (win
== DEFAULT_ZPOS
)
215 win
= ctx
->default_win
;
217 if (win
< 0 || win
>= WINDOWS_NR
)
220 win_data
= &ctx
->win_data
[win
];
222 win_data
->enabled
= true;
224 DRM_DEBUG_KMS("dma_addr = %pad\n", &win_data
->dma_addr
);
227 schedule_work(&ctx
->work
);
230 static void vidi_win_disable(struct exynos_drm_manager
*mgr
, int zpos
)
232 struct vidi_context
*ctx
= mgr
->ctx
;
233 struct vidi_win_data
*win_data
;
236 if (win
== DEFAULT_ZPOS
)
237 win
= ctx
->default_win
;
239 if (win
< 0 || win
>= WINDOWS_NR
)
242 win_data
= &ctx
->win_data
[win
];
243 win_data
->enabled
= false;
248 static int vidi_power_on(struct exynos_drm_manager
*mgr
, bool enable
)
250 struct vidi_context
*ctx
= mgr
->ctx
;
252 DRM_DEBUG_KMS("%s\n", __FILE__
);
254 if (enable
!= false && enable
!= true)
258 ctx
->suspended
= false;
260 /* if vblank was enabled status, enable it again. */
261 if (test_and_clear_bit(0, &ctx
->irq_flags
))
262 vidi_enable_vblank(mgr
);
266 ctx
->suspended
= true;
272 static void vidi_dpms(struct exynos_drm_manager
*mgr
, int mode
)
274 struct vidi_context
*ctx
= mgr
->ctx
;
276 DRM_DEBUG_KMS("%d\n", mode
);
278 mutex_lock(&ctx
->lock
);
281 case DRM_MODE_DPMS_ON
:
282 vidi_power_on(mgr
, true);
284 case DRM_MODE_DPMS_STANDBY
:
285 case DRM_MODE_DPMS_SUSPEND
:
286 case DRM_MODE_DPMS_OFF
:
287 vidi_power_on(mgr
, false);
290 DRM_DEBUG_KMS("unspecified mode %d\n", mode
);
294 mutex_unlock(&ctx
->lock
);
297 static int vidi_mgr_initialize(struct exynos_drm_manager
*mgr
,
298 struct drm_device
*drm_dev
)
300 struct vidi_context
*ctx
= mgr
->ctx
;
301 struct exynos_drm_private
*priv
= drm_dev
->dev_private
;
303 mgr
->drm_dev
= ctx
->drm_dev
= drm_dev
;
304 mgr
->pipe
= ctx
->pipe
= priv
->pipe
++;
307 * enable drm irq mode.
308 * - with irq_enabled = 1, we can use the vblank feature.
310 * P.S. note that we wouldn't use drm irq handler but
311 * just specific driver own one instead because
312 * drm framework supports only one irq handler.
314 drm_dev
->irq_enabled
= 1;
317 * with vblank_disable_allowed = 1, vblank interrupt will be disabled
318 * by drm timer once a current process gives up ownership of
319 * vblank event.(after drm_vblank_put function is called)
321 drm_dev
->vblank_disable_allowed
= 1;
326 static struct exynos_drm_manager_ops vidi_manager_ops
= {
328 .commit
= vidi_commit
,
329 .enable_vblank
= vidi_enable_vblank
,
330 .disable_vblank
= vidi_disable_vblank
,
331 .win_mode_set
= vidi_win_mode_set
,
332 .win_commit
= vidi_win_commit
,
333 .win_disable
= vidi_win_disable
,
336 static struct exynos_drm_manager vidi_manager
= {
337 .type
= EXYNOS_DISPLAY_TYPE_VIDI
,
338 .ops
= &vidi_manager_ops
,
341 static void vidi_fake_vblank_handler(struct work_struct
*work
)
343 struct vidi_context
*ctx
= container_of(work
, struct vidi_context
,
349 /* refresh rate is about 50Hz. */
350 usleep_range(16000, 20000);
352 mutex_lock(&ctx
->lock
);
354 if (ctx
->direct_vblank
) {
355 drm_handle_vblank(ctx
->drm_dev
, ctx
->pipe
);
356 ctx
->direct_vblank
= false;
357 mutex_unlock(&ctx
->lock
);
361 mutex_unlock(&ctx
->lock
);
363 exynos_drm_crtc_finish_pageflip(ctx
->drm_dev
, ctx
->pipe
);
366 static int vidi_show_connection(struct device
*dev
,
367 struct device_attribute
*attr
, char *buf
)
370 struct exynos_drm_manager
*mgr
= get_vidi_mgr(dev
);
371 struct vidi_context
*ctx
= mgr
->ctx
;
373 mutex_lock(&ctx
->lock
);
375 rc
= sprintf(buf
, "%d\n", ctx
->connected
);
377 mutex_unlock(&ctx
->lock
);
382 static int vidi_store_connection(struct device
*dev
,
383 struct device_attribute
*attr
,
384 const char *buf
, size_t len
)
386 struct exynos_drm_manager
*mgr
= get_vidi_mgr(dev
);
387 struct vidi_context
*ctx
= mgr
->ctx
;
390 ret
= kstrtoint(buf
, 0, &ctx
->connected
);
394 if (ctx
->connected
> 1)
397 /* use fake edid data for test. */
399 ctx
->raw_edid
= (struct edid
*)fake_edid_info
;
401 /* if raw_edid isn't same as fake data then it can't be tested. */
402 if (ctx
->raw_edid
!= (struct edid
*)fake_edid_info
) {
403 DRM_DEBUG_KMS("edid data is not fake data.\n");
407 DRM_DEBUG_KMS("requested connection.\n");
409 drm_helper_hpd_irq_event(ctx
->drm_dev
);
414 static DEVICE_ATTR(connection
, 0644, vidi_show_connection
,
415 vidi_store_connection
);
417 int vidi_connection_ioctl(struct drm_device
*drm_dev
, void *data
,
418 struct drm_file
*file_priv
)
420 struct vidi_context
*ctx
= NULL
;
421 struct drm_encoder
*encoder
;
422 struct exynos_drm_display
*display
;
423 struct drm_exynos_vidi_connection
*vidi
= data
;
426 DRM_DEBUG_KMS("user data for vidi is null.\n");
430 if (vidi
->connection
> 1) {
431 DRM_DEBUG_KMS("connection should be 0 or 1.\n");
435 list_for_each_entry(encoder
, &drm_dev
->mode_config
.encoder_list
,
437 display
= exynos_drm_get_display(encoder
);
439 if (display
->type
== EXYNOS_DISPLAY_TYPE_VIDI
) {
446 DRM_DEBUG_KMS("not found virtual device type encoder.\n");
450 if (ctx
->connected
== vidi
->connection
) {
451 DRM_DEBUG_KMS("same connection request.\n");
455 if (vidi
->connection
) {
456 struct edid
*raw_edid
= (struct edid
*)(uint32_t)vidi
->edid
;
457 if (!drm_edid_is_valid(raw_edid
)) {
458 DRM_DEBUG_KMS("edid data is invalid.\n");
461 ctx
->raw_edid
= drm_edid_duplicate(raw_edid
);
462 if (!ctx
->raw_edid
) {
463 DRM_DEBUG_KMS("failed to allocate raw_edid.\n");
468 * with connection = 0, free raw_edid
469 * only if raw edid data isn't same as fake data.
471 if (ctx
->raw_edid
&& ctx
->raw_edid
!=
472 (struct edid
*)fake_edid_info
) {
473 kfree(ctx
->raw_edid
);
474 ctx
->raw_edid
= NULL
;
478 ctx
->connected
= vidi
->connection
;
479 drm_helper_hpd_irq_event(ctx
->drm_dev
);
484 static enum drm_connector_status
vidi_detect(struct drm_connector
*connector
,
487 struct vidi_context
*ctx
= ctx_from_connector(connector
);
490 * connection request would come from user side
491 * to do hotplug through specific ioctl.
493 return ctx
->connected
? connector_status_connected
:
494 connector_status_disconnected
;
497 static void vidi_connector_destroy(struct drm_connector
*connector
)
501 static struct drm_connector_funcs vidi_connector_funcs
= {
502 .dpms
= drm_helper_connector_dpms
,
503 .fill_modes
= drm_helper_probe_single_connector_modes
,
504 .detect
= vidi_detect
,
505 .destroy
= vidi_connector_destroy
,
508 static int vidi_get_modes(struct drm_connector
*connector
)
510 struct vidi_context
*ctx
= ctx_from_connector(connector
);
515 * the edid data comes from user side and it would be set
516 * to ctx->raw_edid through specific ioctl.
518 if (!ctx
->raw_edid
) {
519 DRM_DEBUG_KMS("raw_edid is null.\n");
523 edid_len
= (1 + ctx
->raw_edid
->extensions
) * EDID_LENGTH
;
524 edid
= kmemdup(ctx
->raw_edid
, edid_len
, GFP_KERNEL
);
526 DRM_DEBUG_KMS("failed to allocate edid\n");
530 drm_mode_connector_update_edid_property(connector
, edid
);
532 return drm_add_edid_modes(connector
, edid
);
535 static struct drm_encoder
*vidi_best_encoder(struct drm_connector
*connector
)
537 struct vidi_context
*ctx
= ctx_from_connector(connector
);
542 static struct drm_connector_helper_funcs vidi_connector_helper_funcs
= {
543 .get_modes
= vidi_get_modes
,
544 .best_encoder
= vidi_best_encoder
,
547 static int vidi_create_connector(struct exynos_drm_display
*display
,
548 struct drm_encoder
*encoder
)
550 struct vidi_context
*ctx
= display
->ctx
;
551 struct drm_connector
*connector
= &ctx
->connector
;
554 ctx
->encoder
= encoder
;
555 connector
->polled
= DRM_CONNECTOR_POLL_HPD
;
557 ret
= drm_connector_init(ctx
->drm_dev
, connector
,
558 &vidi_connector_funcs
, DRM_MODE_CONNECTOR_VIRTUAL
);
560 DRM_ERROR("Failed to initialize connector with drm\n");
564 drm_connector_helper_add(connector
, &vidi_connector_helper_funcs
);
565 drm_connector_register(connector
);
566 drm_mode_connector_attach_encoder(connector
, encoder
);
572 static struct exynos_drm_display_ops vidi_display_ops
= {
573 .create_connector
= vidi_create_connector
,
576 static struct exynos_drm_display vidi_display
= {
577 .type
= EXYNOS_DISPLAY_TYPE_VIDI
,
578 .ops
= &vidi_display_ops
,
581 static int vidi_subdrv_probe(struct drm_device
*drm_dev
, struct device
*dev
)
583 struct exynos_drm_manager
*mgr
= get_vidi_mgr(dev
);
584 struct vidi_context
*ctx
= mgr
->ctx
;
585 struct drm_crtc
*crtc
= ctx
->crtc
;
588 vidi_mgr_initialize(mgr
, drm_dev
);
590 ret
= exynos_drm_crtc_create(&vidi_manager
);
592 DRM_ERROR("failed to create crtc.\n");
596 ret
= exynos_drm_create_enc_conn(drm_dev
, &vidi_display
);
598 crtc
->funcs
->destroy(crtc
);
599 DRM_ERROR("failed to create encoder and connector.\n");
606 static int vidi_probe(struct platform_device
*pdev
)
608 struct exynos_drm_subdrv
*subdrv
;
609 struct vidi_context
*ctx
;
612 ctx
= devm_kzalloc(&pdev
->dev
, sizeof(*ctx
), GFP_KERNEL
);
616 ctx
->default_win
= 0;
618 INIT_WORK(&ctx
->work
, vidi_fake_vblank_handler
);
620 vidi_manager
.ctx
= ctx
;
621 vidi_display
.ctx
= ctx
;
623 mutex_init(&ctx
->lock
);
625 platform_set_drvdata(pdev
, &vidi_manager
);
627 subdrv
= &ctx
->subdrv
;
628 subdrv
->dev
= &pdev
->dev
;
629 subdrv
->probe
= vidi_subdrv_probe
;
631 ret
= exynos_drm_subdrv_register(subdrv
);
633 dev_err(&pdev
->dev
, "failed to register drm vidi device\n");
637 ret
= device_create_file(&pdev
->dev
, &dev_attr_connection
);
639 exynos_drm_subdrv_unregister(subdrv
);
640 DRM_INFO("failed to create connection sysfs.\n");
646 static int vidi_remove(struct platform_device
*pdev
)
648 struct exynos_drm_manager
*mgr
= platform_get_drvdata(pdev
);
649 struct vidi_context
*ctx
= mgr
->ctx
;
650 struct drm_encoder
*encoder
= ctx
->encoder
;
651 struct drm_crtc
*crtc
= mgr
->crtc
;
653 if (ctx
->raw_edid
!= (struct edid
*)fake_edid_info
) {
654 kfree(ctx
->raw_edid
);
655 ctx
->raw_edid
= NULL
;
660 crtc
->funcs
->destroy(crtc
);
661 encoder
->funcs
->destroy(encoder
);
662 drm_connector_cleanup(&ctx
->connector
);
667 struct platform_driver vidi_driver
= {
669 .remove
= vidi_remove
,
671 .name
= "exynos-drm-vidi",
672 .owner
= THIS_MODULE
,
676 int exynos_drm_probe_vidi(void)
678 struct platform_device
*pdev
;
681 pdev
= platform_device_register_simple("exynos-drm-vidi", -1, NULL
, 0);
683 return PTR_ERR(pdev
);
685 ret
= platform_driver_register(&vidi_driver
);
687 platform_device_unregister(pdev
);
694 void exynos_drm_remove_vidi(void)
696 struct vidi_context
*ctx
= vidi_manager
.ctx
;
697 struct exynos_drm_subdrv
*subdrv
= &ctx
->subdrv
;
698 struct platform_device
*pdev
= to_platform_device(subdrv
->dev
);
700 platform_driver_unregister(&vidi_driver
);
701 platform_device_unregister(pdev
);