blob: b9df46efb62287966d56282632da20a0014a92a7 [file] [log] [blame]
Dave Airlie53209182010-12-15 07:14:24 +10001/*
2 * Copyright (C) 2012 Red Hat
3 *
4 * based in parts on udlfb.c:
5 * Copyright (C) 2009 Roberto De Ioris <roberto@unbit.it>
6 * Copyright (C) 2009 Jaya Kumar <jayakumar.lkml@gmail.com>
7 * Copyright (C) 2009 Bernie Thompson <bernie@plugable.com>
8 *
9 * This file is subject to the terms and conditions of the GNU General Public
10 * License v2. See the file COPYING in the main directory of this archive for
11 * more details.
12 */
13#include <linux/module.h>
14#include <linux/slab.h>
15#include <linux/fb.h>
Dave Airlie32ecd242012-07-30 14:06:55 +100016#include <linux/dma-buf.h>
Dave Airlie53209182010-12-15 07:14:24 +100017
David Howells760285e2012-10-02 18:01:07 +010018#include <drm/drmP.h>
19#include <drm/drm_crtc.h>
20#include <drm/drm_crtc_helper.h>
Dave Airlie53209182010-12-15 07:14:24 +100021#include "udl_drv.h"
22
David Howells760285e2012-10-02 18:01:07 +010023#include <drm/drm_fb_helper.h>
Dave Airlie53209182010-12-15 07:14:24 +100024
Dave Airlie677d23b2013-02-07 12:30:25 +100025#define DL_DEFIO_WRITE_DELAY (HZ/20) /* fb_deferred_io.delay in jiffies */
Dave Airlie53209182010-12-15 07:14:24 +100026
Dave Airlie677d23b2013-02-07 12:30:25 +100027static int fb_defio = 0; /* Optionally enable experimental fb_defio mmap support */
Dave Airlie53209182010-12-15 07:14:24 +100028static int fb_bpp = 16;
29
30module_param(fb_bpp, int, S_IWUSR | S_IRUSR | S_IWGRP | S_IRGRP);
31module_param(fb_defio, int, S_IWUSR | S_IRUSR | S_IWGRP | S_IRGRP);
32
33struct udl_fbdev {
34 struct drm_fb_helper helper;
35 struct udl_framebuffer ufb;
Dave Airlie53209182010-12-15 07:14:24 +100036 int fb_count;
37};
38
39#define DL_ALIGN_UP(x, a) ALIGN(x, a)
40#define DL_ALIGN_DOWN(x, a) ALIGN(x-(a-1), a)
41
42/** Read the red component (0..255) of a 32 bpp colour. */
43#define DLO_RGB_GETRED(col) (uint8_t)((col) & 0xFF)
44
45/** Read the green component (0..255) of a 32 bpp colour. */
46#define DLO_RGB_GETGRN(col) (uint8_t)(((col) >> 8) & 0xFF)
47
48/** Read the blue component (0..255) of a 32 bpp colour. */
49#define DLO_RGB_GETBLU(col) (uint8_t)(((col) >> 16) & 0xFF)
50
51/** Return red/green component of a 16 bpp colour number. */
52#define DLO_RG16(red, grn) (uint8_t)((((red) & 0xF8) | ((grn) >> 5)) & 0xFF)
53
54/** Return green/blue component of a 16 bpp colour number. */
55#define DLO_GB16(grn, blu) (uint8_t)(((((grn) & 0x1C) << 3) | ((blu) >> 3)) & 0xFF)
56
57/** Return 8 bpp colour number from red, green and blue components. */
58#define DLO_RGB8(red, grn, blu) ((((red) << 5) | (((grn) & 3) << 3) | ((blu) & 7)) & 0xFF)
59
60#if 0
61static uint8_t rgb8(uint32_t col)
62{
63 uint8_t red = DLO_RGB_GETRED(col);
64 uint8_t grn = DLO_RGB_GETGRN(col);
65 uint8_t blu = DLO_RGB_GETBLU(col);
66
67 return DLO_RGB8(red, grn, blu);
68}
69
70static uint16_t rgb16(uint32_t col)
71{
72 uint8_t red = DLO_RGB_GETRED(col);
73 uint8_t grn = DLO_RGB_GETGRN(col);
74 uint8_t blu = DLO_RGB_GETBLU(col);
75
76 return (DLO_RG16(red, grn) << 8) + DLO_GB16(grn, blu);
77}
78#endif
79
80/*
81 * NOTE: fb_defio.c is holding info->fbdefio.mutex
82 * Touching ANY framebuffer memory that triggers a page fault
83 * in fb_defio will cause a deadlock, when it also tries to
84 * grab the same mutex.
85 */
86static void udlfb_dpy_deferred_io(struct fb_info *info,
87 struct list_head *pagelist)
88{
89 struct page *cur;
90 struct fb_deferred_io *fbdefio = info->fbdefio;
91 struct udl_fbdev *ufbdev = info->par;
92 struct drm_device *dev = ufbdev->ufb.base.dev;
93 struct udl_device *udl = dev->dev_private;
94 struct urb *urb;
95 char *cmd;
96 cycles_t start_cycles, end_cycles;
97 int bytes_sent = 0;
98 int bytes_identical = 0;
99 int bytes_rendered = 0;
100
101 if (!fb_defio)
102 return;
103
104 start_cycles = get_cycles();
105
106 urb = udl_get_urb(dev);
107 if (!urb)
108 return;
109
110 cmd = urb->transfer_buffer;
111
112 /* walk the written page list and render each to device */
113 list_for_each_entry(cur, &fbdefio->pagelist, lru) {
114
115 if (udl_render_hline(dev, (ufbdev->ufb.base.bits_per_pixel / 8),
Dave Airlie3916e1d2012-11-01 13:47:09 +1000116 &urb, (char *) info->fix.smem_start,
117 &cmd, cur->index << PAGE_SHIFT,
118 cur->index << PAGE_SHIFT,
119 PAGE_SIZE, &bytes_identical, &bytes_sent))
Dave Airlie53209182010-12-15 07:14:24 +1000120 goto error;
121 bytes_rendered += PAGE_SIZE;
122 }
123
124 if (cmd > (char *) urb->transfer_buffer) {
125 /* Send partial buffer remaining before exiting */
126 int len = cmd - (char *) urb->transfer_buffer;
127 udl_submit_urb(dev, urb, len);
128 bytes_sent += len;
129 } else
130 udl_urb_completion(urb);
131
132error:
133 atomic_add(bytes_sent, &udl->bytes_sent);
134 atomic_add(bytes_identical, &udl->bytes_identical);
135 atomic_add(bytes_rendered, &udl->bytes_rendered);
136 end_cycles = get_cycles();
137 atomic_add(((unsigned int) ((end_cycles - start_cycles)
138 >> 10)), /* Kcycles */
139 &udl->cpu_kcycles_used);
140}
141
142int udl_handle_damage(struct udl_framebuffer *fb, int x, int y,
143 int width, int height)
144{
145 struct drm_device *dev = fb->base.dev;
146 struct udl_device *udl = dev->dev_private;
147 int i, ret;
148 char *cmd;
149 cycles_t start_cycles, end_cycles;
150 int bytes_sent = 0;
151 int bytes_identical = 0;
152 struct urb *urb;
153 int aligned_x;
154 int bpp = (fb->base.bits_per_pixel / 8);
Dave Airliebcb39af2013-02-07 11:19:15 +1000155 int x2, y2;
156 bool store_for_later = false;
157 unsigned long flags;
Dave Airlie53209182010-12-15 07:14:24 +1000158
159 if (!fb->active_16)
160 return 0;
161
Dave Airliee8aa1d12012-03-26 14:36:56 +0100162 if (!fb->obj->vmapping) {
163 ret = udl_gem_vmap(fb->obj);
164 if (ret == -ENOMEM) {
165 DRM_ERROR("failed to vmap fb\n");
166 return 0;
167 }
168 if (!fb->obj->vmapping) {
169 DRM_ERROR("failed to vmapping\n");
170 return 0;
171 }
172 }
Dave Airlie53209182010-12-15 07:14:24 +1000173
Dave Airlie53209182010-12-15 07:14:24 +1000174 aligned_x = DL_ALIGN_DOWN(x, sizeof(unsigned long));
175 width = DL_ALIGN_UP(width + (x-aligned_x), sizeof(unsigned long));
176 x = aligned_x;
177
178 if ((width <= 0) ||
179 (x + width > fb->base.width) ||
180 (y + height > fb->base.height))
181 return -EINVAL;
182
Dave Airliebcb39af2013-02-07 11:19:15 +1000183 /* if we are in atomic just store the info
184 can't test inside spin lock */
185 if (in_atomic())
186 store_for_later = true;
187
188 x2 = x + width - 1;
189 y2 = y + height - 1;
190
191 spin_lock_irqsave(&fb->dirty_lock, flags);
192
193 if (fb->y1 < y)
194 y = fb->y1;
195 if (fb->y2 > y2)
196 y2 = fb->y2;
197 if (fb->x1 < x)
198 x = fb->x1;
199 if (fb->x2 > x2)
200 x2 = fb->x2;
201
202 if (store_for_later) {
203 fb->x1 = x;
204 fb->x2 = x2;
205 fb->y1 = y;
206 fb->y2 = y2;
207 spin_unlock_irqrestore(&fb->dirty_lock, flags);
208 return 0;
209 }
210
211 fb->x1 = fb->y1 = INT_MAX;
212 fb->x2 = fb->y2 = 0;
213
214 spin_unlock_irqrestore(&fb->dirty_lock, flags);
215 start_cycles = get_cycles();
216
Dave Airlie53209182010-12-15 07:14:24 +1000217 urb = udl_get_urb(dev);
218 if (!urb)
219 return 0;
220 cmd = urb->transfer_buffer;
221
Dave Airliebcb39af2013-02-07 11:19:15 +1000222 for (i = y; i <= y2 ; i++) {
Dave Airlie53209182010-12-15 07:14:24 +1000223 const int line_offset = fb->base.pitches[0] * i;
224 const int byte_offset = line_offset + (x * bpp);
Dave Airlie3916e1d2012-11-01 13:47:09 +1000225 const int dev_byte_offset = (fb->base.width * bpp * i) + (x * bpp);
Dave Airlie53209182010-12-15 07:14:24 +1000226 if (udl_render_hline(dev, bpp, &urb,
227 (char *) fb->obj->vmapping,
Dave Airlie3916e1d2012-11-01 13:47:09 +1000228 &cmd, byte_offset, dev_byte_offset,
Dave Airliebcb39af2013-02-07 11:19:15 +1000229 (x2 - x + 1) * bpp,
Dave Airlie53209182010-12-15 07:14:24 +1000230 &bytes_identical, &bytes_sent))
231 goto error;
232 }
233
234 if (cmd > (char *) urb->transfer_buffer) {
235 /* Send partial buffer remaining before exiting */
236 int len = cmd - (char *) urb->transfer_buffer;
237 ret = udl_submit_urb(dev, urb, len);
238 bytes_sent += len;
239 } else
240 udl_urb_completion(urb);
241
242error:
243 atomic_add(bytes_sent, &udl->bytes_sent);
244 atomic_add(bytes_identical, &udl->bytes_identical);
245 atomic_add(width*height*bpp, &udl->bytes_rendered);
246 end_cycles = get_cycles();
247 atomic_add(((unsigned int) ((end_cycles - start_cycles)
248 >> 10)), /* Kcycles */
249 &udl->cpu_kcycles_used);
250
251 return 0;
252}
253
254static int udl_fb_mmap(struct fb_info *info, struct vm_area_struct *vma)
255{
256 unsigned long start = vma->vm_start;
257 unsigned long size = vma->vm_end - vma->vm_start;
258 unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
259 unsigned long page, pos;
260
261 if (offset + size > info->fix.smem_len)
262 return -EINVAL;
263
264 pos = (unsigned long)info->fix.smem_start + offset;
265
266 pr_notice("mmap() framebuffer addr:%lu size:%lu\n",
267 pos, size);
268
269 while (size > 0) {
270 page = vmalloc_to_pfn((void *)pos);
271 if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED))
272 return -EAGAIN;
273
274 start += PAGE_SIZE;
275 pos += PAGE_SIZE;
276 if (size > PAGE_SIZE)
277 size -= PAGE_SIZE;
278 else
279 size = 0;
280 }
281
Konstantin Khlebnikov314e51b2012-10-08 16:29:02 -0700282 /* VM_IO | VM_DONTEXPAND | VM_DONTDUMP are set by remap_pfn_range() */
Dave Airlie53209182010-12-15 07:14:24 +1000283 return 0;
284}
285
286static void udl_fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
287{
288 struct udl_fbdev *ufbdev = info->par;
289
Archit Taneja41ba2f32015-07-22 14:58:16 +0530290 drm_fb_helper_sys_fillrect(info, rect);
Dave Airlie53209182010-12-15 07:14:24 +1000291
292 udl_handle_damage(&ufbdev->ufb, rect->dx, rect->dy, rect->width,
293 rect->height);
294}
295
296static void udl_fb_copyarea(struct fb_info *info, const struct fb_copyarea *region)
297{
298 struct udl_fbdev *ufbdev = info->par;
299
Archit Taneja41ba2f32015-07-22 14:58:16 +0530300 drm_fb_helper_sys_copyarea(info, region);
Dave Airlie53209182010-12-15 07:14:24 +1000301
302 udl_handle_damage(&ufbdev->ufb, region->dx, region->dy, region->width,
303 region->height);
304}
305
306static void udl_fb_imageblit(struct fb_info *info, const struct fb_image *image)
307{
308 struct udl_fbdev *ufbdev = info->par;
309
Archit Taneja41ba2f32015-07-22 14:58:16 +0530310 drm_fb_helper_sys_imageblit(info, image);
Dave Airlie53209182010-12-15 07:14:24 +1000311
312 udl_handle_damage(&ufbdev->ufb, image->dx, image->dy, image->width,
313 image->height);
314}
315
316/*
317 * It's common for several clients to have framebuffer open simultaneously.
318 * e.g. both fbcon and X. Makes things interesting.
319 * Assumes caller is holding info->lock (for open and release at least)
320 */
321static int udl_fb_open(struct fb_info *info, int user)
322{
323 struct udl_fbdev *ufbdev = info->par;
324 struct drm_device *dev = ufbdev->ufb.base.dev;
325 struct udl_device *udl = dev->dev_private;
326
327 /* If the USB device is gone, we don't accept new opens */
328 if (drm_device_is_unplugged(udl->ddev))
329 return -ENODEV;
330
331 ufbdev->fb_count++;
332
333 if (fb_defio && (info->fbdefio == NULL)) {
334 /* enable defio at last moment if not disabled by client */
335
336 struct fb_deferred_io *fbdefio;
337
338 fbdefio = kmalloc(sizeof(struct fb_deferred_io), GFP_KERNEL);
339
340 if (fbdefio) {
341 fbdefio->delay = DL_DEFIO_WRITE_DELAY;
342 fbdefio->deferred_io = udlfb_dpy_deferred_io;
343 }
344
345 info->fbdefio = fbdefio;
346 fb_deferred_io_init(info);
347 }
348
349 pr_notice("open /dev/fb%d user=%d fb_info=%p count=%d\n",
350 info->node, user, info, ufbdev->fb_count);
351
352 return 0;
353}
354
355
356/*
357 * Assumes caller is holding info->lock mutex (for open and release at least)
358 */
359static int udl_fb_release(struct fb_info *info, int user)
360{
361 struct udl_fbdev *ufbdev = info->par;
362
363 ufbdev->fb_count--;
364
365 if ((ufbdev->fb_count == 0) && (info->fbdefio)) {
366 fb_deferred_io_cleanup(info);
367 kfree(info->fbdefio);
368 info->fbdefio = NULL;
369 info->fbops->fb_mmap = udl_fb_mmap;
370 }
371
372 pr_warn("released /dev/fb%d user=%d count=%d\n",
373 info->node, user, ufbdev->fb_count);
374
375 return 0;
376}
377
378static struct fb_ops udlfb_ops = {
379 .owner = THIS_MODULE,
380 .fb_check_var = drm_fb_helper_check_var,
381 .fb_set_par = drm_fb_helper_set_par,
382 .fb_fillrect = udl_fb_fillrect,
383 .fb_copyarea = udl_fb_copyarea,
384 .fb_imageblit = udl_fb_imageblit,
385 .fb_pan_display = drm_fb_helper_pan_display,
386 .fb_blank = drm_fb_helper_blank,
387 .fb_setcmap = drm_fb_helper_setcmap,
388 .fb_debug_enter = drm_fb_helper_debug_enter,
389 .fb_debug_leave = drm_fb_helper_debug_leave,
390 .fb_mmap = udl_fb_mmap,
391 .fb_open = udl_fb_open,
392 .fb_release = udl_fb_release,
393};
394
Dave Airlie53209182010-12-15 07:14:24 +1000395static int udl_user_framebuffer_dirty(struct drm_framebuffer *fb,
396 struct drm_file *file,
397 unsigned flags, unsigned color,
398 struct drm_clip_rect *clips,
399 unsigned num_clips)
400{
401 struct udl_framebuffer *ufb = to_udl_fb(fb);
402 int i;
Dave Airlie32ecd242012-07-30 14:06:55 +1000403 int ret = 0;
Dave Airlie53209182010-12-15 07:14:24 +1000404
Ville Syrjälä73e9efd2013-12-04 14:13:58 +0200405 drm_modeset_lock_all(fb->dev);
406
Dave Airlie53209182010-12-15 07:14:24 +1000407 if (!ufb->active_16)
Ville Syrjälä73e9efd2013-12-04 14:13:58 +0200408 goto unlock;
Dave Airlie53209182010-12-15 07:14:24 +1000409
Dave Airlie32ecd242012-07-30 14:06:55 +1000410 if (ufb->obj->base.import_attach) {
411 ret = dma_buf_begin_cpu_access(ufb->obj->base.import_attach->dmabuf,
412 0, ufb->obj->base.size,
413 DMA_FROM_DEVICE);
414 if (ret)
Ville Syrjälä73e9efd2013-12-04 14:13:58 +0200415 goto unlock;
Dave Airlie32ecd242012-07-30 14:06:55 +1000416 }
417
Dave Airlie53209182010-12-15 07:14:24 +1000418 for (i = 0; i < num_clips; i++) {
Dave Airlie32ecd242012-07-30 14:06:55 +1000419 ret = udl_handle_damage(ufb, clips[i].x1, clips[i].y1,
Dave Airlie53209182010-12-15 07:14:24 +1000420 clips[i].x2 - clips[i].x1,
421 clips[i].y2 - clips[i].y1);
Dave Airlie32ecd242012-07-30 14:06:55 +1000422 if (ret)
David Herrmann06c991612014-01-20 19:52:29 +0100423 break;
Dave Airlie53209182010-12-15 07:14:24 +1000424 }
Dave Airlie32ecd242012-07-30 14:06:55 +1000425
426 if (ufb->obj->base.import_attach) {
427 dma_buf_end_cpu_access(ufb->obj->base.import_attach->dmabuf,
428 0, ufb->obj->base.size,
429 DMA_FROM_DEVICE);
430 }
Ville Syrjälä73e9efd2013-12-04 14:13:58 +0200431
432 unlock:
433 drm_modeset_unlock_all(fb->dev);
434
Dave Airlie32ecd242012-07-30 14:06:55 +1000435 return ret;
Dave Airlie53209182010-12-15 07:14:24 +1000436}
437
438static void udl_user_framebuffer_destroy(struct drm_framebuffer *fb)
439{
440 struct udl_framebuffer *ufb = to_udl_fb(fb);
441
442 if (ufb->obj)
443 drm_gem_object_unreference_unlocked(&ufb->obj->base);
444
445 drm_framebuffer_cleanup(fb);
446 kfree(ufb);
447}
448
449static const struct drm_framebuffer_funcs udlfb_funcs = {
450 .destroy = udl_user_framebuffer_destroy,
451 .dirty = udl_user_framebuffer_dirty,
Dave Airlie53209182010-12-15 07:14:24 +1000452};
453
454
455static int
456udl_framebuffer_init(struct drm_device *dev,
457 struct udl_framebuffer *ufb,
458 struct drm_mode_fb_cmd2 *mode_cmd,
459 struct udl_gem_object *obj)
460{
461 int ret;
462
Dave Airliebcb39af2013-02-07 11:19:15 +1000463 spin_lock_init(&ufb->dirty_lock);
Dave Airlie53209182010-12-15 07:14:24 +1000464 ufb->obj = obj;
Dave Airlie53209182010-12-15 07:14:24 +1000465 drm_helper_mode_fill_fb_struct(&ufb->base, mode_cmd);
Daniel Vetterc7d73f62012-12-13 23:38:38 +0100466 ret = drm_framebuffer_init(dev, &ufb->base, &udlfb_funcs);
Dave Airlie53209182010-12-15 07:14:24 +1000467 return ret;
468}
469
470
Daniel Vettercd5428a2013-01-21 23:42:49 +0100471static int udlfb_create(struct drm_fb_helper *helper,
Dave Airlie53209182010-12-15 07:14:24 +1000472 struct drm_fb_helper_surface_size *sizes)
473{
Fabian Frederickee0d68a2014-09-14 18:40:22 +0200474 struct udl_fbdev *ufbdev =
475 container_of(helper, struct udl_fbdev, helper);
Dave Airlie53209182010-12-15 07:14:24 +1000476 struct drm_device *dev = ufbdev->helper.dev;
477 struct fb_info *info;
Dave Airlie53209182010-12-15 07:14:24 +1000478 struct drm_framebuffer *fb;
479 struct drm_mode_fb_cmd2 mode_cmd;
480 struct udl_gem_object *obj;
481 uint32_t size;
482 int ret = 0;
483
484 if (sizes->surface_bpp == 24)
485 sizes->surface_bpp = 32;
486
487 mode_cmd.width = sizes->surface_width;
488 mode_cmd.height = sizes->surface_height;
489 mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7) / 8);
490
491 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
492 sizes->surface_depth);
493
494 size = mode_cmd.pitches[0] * mode_cmd.height;
495 size = ALIGN(size, PAGE_SIZE);
496
497 obj = udl_gem_alloc_object(dev, size);
498 if (!obj)
499 goto out;
500
501 ret = udl_gem_vmap(obj);
502 if (ret) {
503 DRM_ERROR("failed to vmap fb\n");
504 goto out_gfree;
505 }
506
Archit Taneja41ba2f32015-07-22 14:58:16 +0530507 info = drm_fb_helper_alloc_fbi(helper);
508 if (IS_ERR(info)) {
509 ret = PTR_ERR(info);
Dave Airlie53209182010-12-15 07:14:24 +1000510 goto out_gfree;
511 }
512 info->par = ufbdev;
513
514 ret = udl_framebuffer_init(dev, &ufbdev->ufb, &mode_cmd, obj);
515 if (ret)
Archit Taneja41ba2f32015-07-22 14:58:16 +0530516 goto out_destroy_fbi;
Dave Airlie53209182010-12-15 07:14:24 +1000517
518 fb = &ufbdev->ufb.base;
519
520 ufbdev->helper.fb = fb;
Dave Airlie53209182010-12-15 07:14:24 +1000521
522 strcpy(info->fix.id, "udldrmfb");
523
524 info->screen_base = ufbdev->ufb.obj->vmapping;
525 info->fix.smem_len = size;
526 info->fix.smem_start = (unsigned long)ufbdev->ufb.obj->vmapping;
527
528 info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
529 info->fbops = &udlfb_ops;
530 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
531 drm_fb_helper_fill_var(info, &ufbdev->helper, sizes->fb_width, sizes->fb_height);
532
Dave Airlie53209182010-12-15 07:14:24 +1000533 DRM_DEBUG_KMS("allocated %dx%d vmal %p\n",
534 fb->width, fb->height,
535 ufbdev->ufb.obj->vmapping);
536
537 return ret;
Archit Taneja41ba2f32015-07-22 14:58:16 +0530538out_destroy_fbi:
539 drm_fb_helper_release_fbi(helper);
Dave Airlie53209182010-12-15 07:14:24 +1000540out_gfree:
541 drm_gem_object_unreference(&ufbdev->ufb.obj->base);
542out:
543 return ret;
544}
545
Thierry Reding3a493872014-06-27 17:19:23 +0200546static const struct drm_fb_helper_funcs udl_fb_helper_funcs = {
Daniel Vettercd5428a2013-01-21 23:42:49 +0100547 .fb_probe = udlfb_create,
Dave Airlie53209182010-12-15 07:14:24 +1000548};
549
550static void udl_fbdev_destroy(struct drm_device *dev,
551 struct udl_fbdev *ufbdev)
552{
Archit Taneja41ba2f32015-07-22 14:58:16 +0530553 drm_fb_helper_unregister_fbi(&ufbdev->helper);
554 drm_fb_helper_release_fbi(&ufbdev->helper);
Dave Airlie53209182010-12-15 07:14:24 +1000555 drm_fb_helper_fini(&ufbdev->helper);
Daniel Vetter36206362012-12-10 20:42:17 +0100556 drm_framebuffer_unregister_private(&ufbdev->ufb.base);
Dave Airlie53209182010-12-15 07:14:24 +1000557 drm_framebuffer_cleanup(&ufbdev->ufb.base);
558 drm_gem_object_unreference_unlocked(&ufbdev->ufb.obj->base);
559}
560
561int udl_fbdev_init(struct drm_device *dev)
562{
563 struct udl_device *udl = dev->dev_private;
564 int bpp_sel = fb_bpp;
565 struct udl_fbdev *ufbdev;
566 int ret;
567
568 ufbdev = kzalloc(sizeof(struct udl_fbdev), GFP_KERNEL);
569 if (!ufbdev)
570 return -ENOMEM;
571
572 udl->fbdev = ufbdev;
Thierry Reding10a23102014-06-27 17:19:24 +0200573
574 drm_fb_helper_prepare(dev, &ufbdev->helper, &udl_fb_helper_funcs);
Dave Airlie53209182010-12-15 07:14:24 +1000575
576 ret = drm_fb_helper_init(dev, &ufbdev->helper,
577 1, 1);
Thierry Reding01934c22014-12-19 11:21:32 +0100578 if (ret)
579 goto free;
Dave Airlie53209182010-12-15 07:14:24 +1000580
Thierry Reding01934c22014-12-19 11:21:32 +0100581 ret = drm_fb_helper_single_add_all_connectors(&ufbdev->helper);
582 if (ret)
583 goto fini;
Daniel Vetter76a39db2013-01-20 23:12:54 +0100584
585 /* disable all the possible outputs/crtcs before entering KMS mode */
586 drm_helper_disable_unused_functions(dev);
587
Thierry Reding01934c22014-12-19 11:21:32 +0100588 ret = drm_fb_helper_initial_config(&ufbdev->helper, bpp_sel);
589 if (ret)
590 goto fini;
591
Dave Airlie53209182010-12-15 07:14:24 +1000592 return 0;
Thierry Reding01934c22014-12-19 11:21:32 +0100593
594fini:
595 drm_fb_helper_fini(&ufbdev->helper);
596free:
597 kfree(ufbdev);
598 return ret;
Dave Airlie53209182010-12-15 07:14:24 +1000599}
600
601void udl_fbdev_cleanup(struct drm_device *dev)
602{
603 struct udl_device *udl = dev->dev_private;
604 if (!udl->fbdev)
605 return;
606
607 udl_fbdev_destroy(dev, udl->fbdev);
608 kfree(udl->fbdev);
609 udl->fbdev = NULL;
610}
611
612void udl_fbdev_unplug(struct drm_device *dev)
613{
614 struct udl_device *udl = dev->dev_private;
615 struct udl_fbdev *ufbdev;
616 if (!udl->fbdev)
617 return;
618
619 ufbdev = udl->fbdev;
Archit Taneja41ba2f32015-07-22 14:58:16 +0530620 drm_fb_helper_unlink_fbi(&ufbdev->helper);
Dave Airlie53209182010-12-15 07:14:24 +1000621}
622
623struct drm_framebuffer *
624udl_fb_user_fb_create(struct drm_device *dev,
625 struct drm_file *file,
626 struct drm_mode_fb_cmd2 *mode_cmd)
627{
628 struct drm_gem_object *obj;
629 struct udl_framebuffer *ufb;
630 int ret;
Dave Airlie96503f52011-12-21 11:23:44 +0000631 uint32_t size;
Dave Airlie53209182010-12-15 07:14:24 +1000632
633 obj = drm_gem_object_lookup(dev, file, mode_cmd->handles[0]);
634 if (obj == NULL)
635 return ERR_PTR(-ENOENT);
636
Dave Airlie96503f52011-12-21 11:23:44 +0000637 size = mode_cmd->pitches[0] * mode_cmd->height;
638 size = ALIGN(size, PAGE_SIZE);
639
640 if (size > obj->size) {
641 DRM_ERROR("object size not sufficient for fb %d %zu %d %d\n", size, obj->size, mode_cmd->pitches[0], mode_cmd->height);
642 return ERR_PTR(-ENOMEM);
643 }
644
Dave Airlie53209182010-12-15 07:14:24 +1000645 ufb = kzalloc(sizeof(*ufb), GFP_KERNEL);
646 if (ufb == NULL)
647 return ERR_PTR(-ENOMEM);
648
649 ret = udl_framebuffer_init(dev, ufb, mode_cmd, to_udl_bo(obj));
650 if (ret) {
651 kfree(ufb);
652 return ERR_PTR(-EINVAL);
653 }
654 return &ufb->base;
655}