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>
17 #include <linux/component.h>
19 #include <drm/exynos_drm.h>
21 #include <drm/drm_edid.h>
22 #include <drm/drm_crtc_helper.h>
23 #include <drm/drm_atomic_helper.h>
25 #include "exynos_drm_drv.h"
26 #include "exynos_drm_crtc.h"
27 #include "exynos_drm_fb.h"
28 #include "exynos_drm_plane.h"
29 #include "exynos_drm_vidi.h"
31 /* vidi has totally three virtual windows. */
34 #define ctx_from_connector(c) container_of(c, struct vidi_context, \
38 struct drm_encoder encoder
;
39 struct platform_device
*pdev
;
40 struct drm_device
*drm_dev
;
41 struct exynos_drm_crtc
*crtc
;
42 struct drm_connector connector
;
43 struct exynos_drm_plane planes
[WINDOWS_NR
];
44 struct edid
*raw_edid
;
46 unsigned long irq_flags
;
47 unsigned int connected
;
51 struct work_struct work
;
56 static inline struct vidi_context
*encoder_to_vidi(struct drm_encoder
*e
)
58 return container_of(e
, struct vidi_context
, encoder
);
61 static const char fake_edid_info
[] = {
62 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05,
63 0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78,
64 0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd,
65 0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
66 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00,
67 0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e,
68 0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00,
69 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18,
70 0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
71 0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47,
72 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1,
73 0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83,
74 0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00,
75 0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c,
76 0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a,
77 0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00,
78 0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c,
79 0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0x00,
80 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
81 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
82 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
83 0x00, 0x00, 0x00, 0x06
86 static const uint32_t formats
[] = {
92 static const enum drm_plane_type vidi_win_types
[WINDOWS_NR
] = {
93 DRM_PLANE_TYPE_PRIMARY
,
94 DRM_PLANE_TYPE_OVERLAY
,
95 DRM_PLANE_TYPE_CURSOR
,
98 static int vidi_enable_vblank(struct exynos_drm_crtc
*crtc
)
100 struct vidi_context
*ctx
= crtc
->ctx
;
105 if (!test_and_set_bit(0, &ctx
->irq_flags
))
106 ctx
->vblank_on
= true;
108 ctx
->direct_vblank
= true;
111 * in case of page flip request, vidi_finish_pageflip function
112 * will not be called because direct_vblank is true and then
113 * that function will be called by crtc_ops->update_plane callback
115 schedule_work(&ctx
->work
);
120 static void vidi_disable_vblank(struct exynos_drm_crtc
*crtc
)
122 struct vidi_context
*ctx
= crtc
->ctx
;
127 if (test_and_clear_bit(0, &ctx
->irq_flags
))
128 ctx
->vblank_on
= false;
131 static void vidi_update_plane(struct exynos_drm_crtc
*crtc
,
132 struct exynos_drm_plane
*plane
)
134 struct drm_plane_state
*state
= plane
->base
.state
;
135 struct vidi_context
*ctx
= crtc
->ctx
;
141 addr
= exynos_drm_fb_dma_addr(state
->fb
, 0);
142 DRM_DEBUG_KMS("dma_addr = %pad\n", &addr
);
145 schedule_work(&ctx
->work
);
148 static void vidi_enable(struct exynos_drm_crtc
*crtc
)
150 struct vidi_context
*ctx
= crtc
->ctx
;
152 mutex_lock(&ctx
->lock
);
154 ctx
->suspended
= false;
156 /* if vblank was enabled status, enable it again. */
157 if (test_and_clear_bit(0, &ctx
->irq_flags
))
158 vidi_enable_vblank(ctx
->crtc
);
160 mutex_unlock(&ctx
->lock
);
163 static void vidi_disable(struct exynos_drm_crtc
*crtc
)
165 struct vidi_context
*ctx
= crtc
->ctx
;
167 mutex_lock(&ctx
->lock
);
169 ctx
->suspended
= true;
171 mutex_unlock(&ctx
->lock
);
174 static int vidi_ctx_initialize(struct vidi_context
*ctx
,
175 struct drm_device
*drm_dev
)
177 struct exynos_drm_private
*priv
= drm_dev
->dev_private
;
179 ctx
->drm_dev
= drm_dev
;
180 ctx
->pipe
= priv
->pipe
++;
185 static const struct exynos_drm_crtc_ops vidi_crtc_ops
= {
186 .enable
= vidi_enable
,
187 .disable
= vidi_disable
,
188 .enable_vblank
= vidi_enable_vblank
,
189 .disable_vblank
= vidi_disable_vblank
,
190 .update_plane
= vidi_update_plane
,
193 static void vidi_fake_vblank_handler(struct work_struct
*work
)
195 struct vidi_context
*ctx
= container_of(work
, struct vidi_context
,
202 /* refresh rate is about 50Hz. */
203 usleep_range(16000, 20000);
205 mutex_lock(&ctx
->lock
);
207 if (ctx
->direct_vblank
) {
208 drm_crtc_handle_vblank(&ctx
->crtc
->base
);
209 ctx
->direct_vblank
= false;
210 mutex_unlock(&ctx
->lock
);
214 mutex_unlock(&ctx
->lock
);
216 for (win
= 0 ; win
< WINDOWS_NR
; win
++) {
217 struct exynos_drm_plane
*plane
= &ctx
->planes
[win
];
219 if (!plane
->pending_fb
)
222 exynos_drm_crtc_finish_update(ctx
->crtc
, plane
);
226 static int vidi_show_connection(struct device
*dev
,
227 struct device_attribute
*attr
, char *buf
)
229 struct vidi_context
*ctx
= dev_get_drvdata(dev
);
232 mutex_lock(&ctx
->lock
);
234 rc
= sprintf(buf
, "%d\n", ctx
->connected
);
236 mutex_unlock(&ctx
->lock
);
241 static int vidi_store_connection(struct device
*dev
,
242 struct device_attribute
*attr
,
243 const char *buf
, size_t len
)
245 struct vidi_context
*ctx
= dev_get_drvdata(dev
);
248 ret
= kstrtoint(buf
, 0, &ctx
->connected
);
252 if (ctx
->connected
> 1)
255 /* use fake edid data for test. */
257 ctx
->raw_edid
= (struct edid
*)fake_edid_info
;
259 /* if raw_edid isn't same as fake data then it can't be tested. */
260 if (ctx
->raw_edid
!= (struct edid
*)fake_edid_info
) {
261 DRM_DEBUG_KMS("edid data is not fake data.\n");
265 DRM_DEBUG_KMS("requested connection.\n");
267 drm_helper_hpd_irq_event(ctx
->drm_dev
);
272 static DEVICE_ATTR(connection
, 0644, vidi_show_connection
,
273 vidi_store_connection
);
275 int vidi_connection_ioctl(struct drm_device
*drm_dev
, void *data
,
276 struct drm_file
*file_priv
)
278 struct vidi_context
*ctx
= dev_get_drvdata(drm_dev
->dev
);
279 struct drm_exynos_vidi_connection
*vidi
= data
;
282 DRM_DEBUG_KMS("user data for vidi is null.\n");
286 if (vidi
->connection
> 1) {
287 DRM_DEBUG_KMS("connection should be 0 or 1.\n");
291 if (ctx
->connected
== vidi
->connection
) {
292 DRM_DEBUG_KMS("same connection request.\n");
296 if (vidi
->connection
) {
297 struct edid
*raw_edid
= (struct edid
*)(uint32_t)vidi
->edid
;
298 if (!drm_edid_is_valid(raw_edid
)) {
299 DRM_DEBUG_KMS("edid data is invalid.\n");
302 ctx
->raw_edid
= drm_edid_duplicate(raw_edid
);
303 if (!ctx
->raw_edid
) {
304 DRM_DEBUG_KMS("failed to allocate raw_edid.\n");
309 * with connection = 0, free raw_edid
310 * only if raw edid data isn't same as fake data.
312 if (ctx
->raw_edid
&& ctx
->raw_edid
!=
313 (struct edid
*)fake_edid_info
) {
314 kfree(ctx
->raw_edid
);
315 ctx
->raw_edid
= NULL
;
319 ctx
->connected
= vidi
->connection
;
320 drm_helper_hpd_irq_event(ctx
->drm_dev
);
325 static enum drm_connector_status
vidi_detect(struct drm_connector
*connector
,
328 struct vidi_context
*ctx
= ctx_from_connector(connector
);
331 * connection request would come from user side
332 * to do hotplug through specific ioctl.
334 return ctx
->connected
? connector_status_connected
:
335 connector_status_disconnected
;
338 static void vidi_connector_destroy(struct drm_connector
*connector
)
342 static struct drm_connector_funcs vidi_connector_funcs
= {
343 .dpms
= drm_atomic_helper_connector_dpms
,
344 .fill_modes
= drm_helper_probe_single_connector_modes
,
345 .detect
= vidi_detect
,
346 .destroy
= vidi_connector_destroy
,
347 .reset
= drm_atomic_helper_connector_reset
,
348 .atomic_duplicate_state
= drm_atomic_helper_connector_duplicate_state
,
349 .atomic_destroy_state
= drm_atomic_helper_connector_destroy_state
,
352 static int vidi_get_modes(struct drm_connector
*connector
)
354 struct vidi_context
*ctx
= ctx_from_connector(connector
);
359 * the edid data comes from user side and it would be set
360 * to ctx->raw_edid through specific ioctl.
362 if (!ctx
->raw_edid
) {
363 DRM_DEBUG_KMS("raw_edid is null.\n");
367 edid_len
= (1 + ctx
->raw_edid
->extensions
) * EDID_LENGTH
;
368 edid
= kmemdup(ctx
->raw_edid
, edid_len
, GFP_KERNEL
);
370 DRM_DEBUG_KMS("failed to allocate edid\n");
374 drm_mode_connector_update_edid_property(connector
, edid
);
376 return drm_add_edid_modes(connector
, edid
);
379 static struct drm_encoder
*vidi_best_encoder(struct drm_connector
*connector
)
381 struct vidi_context
*ctx
= ctx_from_connector(connector
);
383 return &ctx
->encoder
;
386 static struct drm_connector_helper_funcs vidi_connector_helper_funcs
= {
387 .get_modes
= vidi_get_modes
,
388 .best_encoder
= vidi_best_encoder
,
391 static int vidi_create_connector(struct drm_encoder
*encoder
)
393 struct vidi_context
*ctx
= encoder_to_vidi(encoder
);
394 struct drm_connector
*connector
= &ctx
->connector
;
397 connector
->polled
= DRM_CONNECTOR_POLL_HPD
;
399 ret
= drm_connector_init(ctx
->drm_dev
, connector
,
400 &vidi_connector_funcs
, DRM_MODE_CONNECTOR_VIRTUAL
);
402 DRM_ERROR("Failed to initialize connector with drm\n");
406 drm_connector_helper_add(connector
, &vidi_connector_helper_funcs
);
407 drm_connector_register(connector
);
408 drm_mode_connector_attach_encoder(connector
, encoder
);
413 static bool exynos_vidi_mode_fixup(struct drm_encoder
*encoder
,
414 const struct drm_display_mode
*mode
,
415 struct drm_display_mode
*adjusted_mode
)
420 static void exynos_vidi_mode_set(struct drm_encoder
*encoder
,
421 struct drm_display_mode
*mode
,
422 struct drm_display_mode
*adjusted_mode
)
426 static void exynos_vidi_enable(struct drm_encoder
*encoder
)
430 static void exynos_vidi_disable(struct drm_encoder
*encoder
)
434 static struct drm_encoder_helper_funcs exynos_vidi_encoder_helper_funcs
= {
435 .mode_fixup
= exynos_vidi_mode_fixup
,
436 .mode_set
= exynos_vidi_mode_set
,
437 .enable
= exynos_vidi_enable
,
438 .disable
= exynos_vidi_disable
,
441 static struct drm_encoder_funcs exynos_vidi_encoder_funcs
= {
442 .destroy
= drm_encoder_cleanup
,
445 static int vidi_bind(struct device
*dev
, struct device
*master
, void *data
)
447 struct vidi_context
*ctx
= dev_get_drvdata(dev
);
448 struct drm_device
*drm_dev
= data
;
449 struct drm_encoder
*encoder
= &ctx
->encoder
;
450 struct exynos_drm_plane
*exynos_plane
;
451 struct exynos_drm_plane_config plane_config
= { 0 };
455 vidi_ctx_initialize(ctx
, drm_dev
);
457 plane_config
.pixel_formats
= formats
;
458 plane_config
.num_pixel_formats
= ARRAY_SIZE(formats
);
460 for (i
= 0; i
< WINDOWS_NR
; i
++) {
461 plane_config
.zpos
= i
;
462 plane_config
.type
= vidi_win_types
[i
];
464 ret
= exynos_plane_init(drm_dev
, &ctx
->planes
[i
],
465 1 << ctx
->pipe
, &plane_config
);
470 exynos_plane
= &ctx
->planes
[DEFAULT_WIN
];
471 ctx
->crtc
= exynos_drm_crtc_create(drm_dev
, &exynos_plane
->base
,
472 ctx
->pipe
, EXYNOS_DISPLAY_TYPE_VIDI
,
473 &vidi_crtc_ops
, ctx
);
474 if (IS_ERR(ctx
->crtc
)) {
475 DRM_ERROR("failed to create crtc.\n");
476 return PTR_ERR(ctx
->crtc
);
479 pipe
= exynos_drm_crtc_get_pipe_from_type(drm_dev
,
480 EXYNOS_DISPLAY_TYPE_VIDI
);
484 encoder
->possible_crtcs
= 1 << pipe
;
486 DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder
->possible_crtcs
);
488 drm_encoder_init(drm_dev
, encoder
, &exynos_vidi_encoder_funcs
,
489 DRM_MODE_ENCODER_TMDS
, NULL
);
491 drm_encoder_helper_add(encoder
, &exynos_vidi_encoder_helper_funcs
);
493 ret
= vidi_create_connector(encoder
);
495 DRM_ERROR("failed to create connector ret = %d\n", ret
);
496 drm_encoder_cleanup(encoder
);
504 static void vidi_unbind(struct device
*dev
, struct device
*master
, void *data
)
508 static const struct component_ops vidi_component_ops
= {
510 .unbind
= vidi_unbind
,
513 static int vidi_probe(struct platform_device
*pdev
)
515 struct vidi_context
*ctx
;
518 ctx
= devm_kzalloc(&pdev
->dev
, sizeof(*ctx
), GFP_KERNEL
);
524 INIT_WORK(&ctx
->work
, vidi_fake_vblank_handler
);
526 mutex_init(&ctx
->lock
);
528 platform_set_drvdata(pdev
, ctx
);
530 ret
= device_create_file(&pdev
->dev
, &dev_attr_connection
);
532 DRM_ERROR("failed to create connection sysfs.\n");
536 ret
= component_add(&pdev
->dev
, &vidi_component_ops
);
538 goto err_remove_file
;
543 device_remove_file(&pdev
->dev
, &dev_attr_connection
);
548 static int vidi_remove(struct platform_device
*pdev
)
550 struct vidi_context
*ctx
= platform_get_drvdata(pdev
);
552 if (ctx
->raw_edid
!= (struct edid
*)fake_edid_info
) {
553 kfree(ctx
->raw_edid
);
554 ctx
->raw_edid
= NULL
;
559 component_del(&pdev
->dev
, &vidi_component_ops
);
564 struct platform_driver vidi_driver
= {
566 .remove
= vidi_remove
,
568 .name
= "exynos-drm-vidi",
569 .owner
= THIS_MODULE
,