1 // SPDX-License-Identifier: GPL-2.0-only
2 /**************************************************************************
3 * Copyright (c) 2007-2011, Intel Corporation.
4 * All Rights Reserved.
5 *
6 **************************************************************************/
7
8 #include <linux/console.h>
9 #include <linux/delay.h>
10 #include <linux/errno.h>
11 #include <linux/init.h>
12 #include <linux/kernel.h>
13 #include <linux/mm.h>
14 #include <linux/module.h>
15 #include <linux/pfn_t.h>
16 #include <linux/slab.h>
17 #include <linux/string.h>
18 #include <linux/tty.h>
19
20 #include <drm/drm.h>
21 #include <drm/drm_crtc.h>
22 #include <drm/drm_fb_helper.h>
23 #include <drm/drm_fourcc.h>
24 #include <drm/drm_gem_framebuffer_helper.h>
25
26 #include "framebuffer.h"
27 #include "gem.h"
28 #include "psb_drv.h"
29 #include "psb_intel_drv.h"
30 #include "psb_intel_reg.h"
31
32 static const struct drm_framebuffer_funcs psb_fb_funcs = {
33 .destroy = drm_gem_fb_destroy,
34 .create_handle = drm_gem_fb_create_handle,
35 };
36
37 #define CMAP_TOHW(_val, _width) ((((_val) << (_width)) + 0x7FFF - (_val)) >> 16)
38
psbfb_setcolreg(unsigned regno,unsigned red,unsigned green,unsigned blue,unsigned transp,struct fb_info * info)39 static int psbfb_setcolreg(unsigned regno, unsigned red, unsigned green,
40 unsigned blue, unsigned transp,
41 struct fb_info *info)
42 {
43 struct drm_fb_helper *fb_helper = info->par;
44 struct drm_framebuffer *fb = fb_helper->fb;
45 uint32_t v;
46
47 if (!fb)
48 return -ENOMEM;
49
50 if (regno > 255)
51 return 1;
52
53 red = CMAP_TOHW(red, info->var.red.length);
54 blue = CMAP_TOHW(blue, info->var.blue.length);
55 green = CMAP_TOHW(green, info->var.green.length);
56 transp = CMAP_TOHW(transp, info->var.transp.length);
57
58 v = (red << info->var.red.offset) |
59 (green << info->var.green.offset) |
60 (blue << info->var.blue.offset) |
61 (transp << info->var.transp.offset);
62
63 if (regno < 16) {
64 switch (fb->format->cpp[0] * 8) {
65 case 16:
66 ((uint32_t *) info->pseudo_palette)[regno] = v;
67 break;
68 case 24:
69 case 32:
70 ((uint32_t *) info->pseudo_palette)[regno] = v;
71 break;
72 }
73 }
74
75 return 0;
76 }
77
psbfb_vm_fault(struct vm_fault * vmf)78 static vm_fault_t psbfb_vm_fault(struct vm_fault *vmf)
79 {
80 struct vm_area_struct *vma = vmf->vma;
81 struct drm_framebuffer *fb = vma->vm_private_data;
82 struct drm_device *dev = fb->dev;
83 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
84 struct psb_gem_object *pobj = to_psb_gem_object(fb->obj[0]);
85 int page_num;
86 int i;
87 unsigned long address;
88 vm_fault_t ret = VM_FAULT_SIGBUS;
89 unsigned long pfn;
90 unsigned long phys_addr = (unsigned long)dev_priv->stolen_base + pobj->offset;
91
92 page_num = vma_pages(vma);
93 address = vmf->address - (vmf->pgoff << PAGE_SHIFT);
94
95 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
96
97 for (i = 0; i < page_num; i++) {
98 pfn = (phys_addr >> PAGE_SHIFT);
99
100 ret = vmf_insert_mixed(vma, address,
101 __pfn_to_pfn_t(pfn, PFN_DEV));
102 if (unlikely(ret & VM_FAULT_ERROR))
103 break;
104 address += PAGE_SIZE;
105 phys_addr += PAGE_SIZE;
106 }
107 return ret;
108 }
109
psbfb_vm_open(struct vm_area_struct * vma)110 static void psbfb_vm_open(struct vm_area_struct *vma)
111 {
112 }
113
psbfb_vm_close(struct vm_area_struct * vma)114 static void psbfb_vm_close(struct vm_area_struct *vma)
115 {
116 }
117
118 static const struct vm_operations_struct psbfb_vm_ops = {
119 .fault = psbfb_vm_fault,
120 .open = psbfb_vm_open,
121 .close = psbfb_vm_close
122 };
123
psbfb_mmap(struct fb_info * info,struct vm_area_struct * vma)124 static int psbfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
125 {
126 struct drm_fb_helper *fb_helper = info->par;
127 struct drm_framebuffer *fb = fb_helper->fb;
128
129 if (vma->vm_pgoff != 0)
130 return -EINVAL;
131 if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
132 return -EINVAL;
133
134 /*
135 * If this is a GEM object then info->screen_base is the virtual
136 * kernel remapping of the object. FIXME: Review if this is
137 * suitable for our mmap work
138 */
139 vma->vm_ops = &psbfb_vm_ops;
140 vma->vm_private_data = (void *)fb;
141 vma->vm_flags |= VM_IO | VM_MIXEDMAP | VM_DONTEXPAND | VM_DONTDUMP;
142 return 0;
143 }
144
145 static const struct fb_ops psbfb_unaccel_ops = {
146 .owner = THIS_MODULE,
147 DRM_FB_HELPER_DEFAULT_OPS,
148 .fb_setcolreg = psbfb_setcolreg,
149 .fb_fillrect = drm_fb_helper_cfb_fillrect,
150 .fb_copyarea = drm_fb_helper_cfb_copyarea,
151 .fb_imageblit = drm_fb_helper_cfb_imageblit,
152 .fb_mmap = psbfb_mmap,
153 };
154
155 /**
156 * psb_framebuffer_init - initialize a framebuffer
157 * @dev: our DRM device
158 * @fb: framebuffer to set up
159 * @mode_cmd: mode description
160 * @obj: backing object
161 *
162 * Configure and fill in the boilerplate for our frame buffer. Return
163 * 0 on success or an error code if we fail.
164 */
psb_framebuffer_init(struct drm_device * dev,struct drm_framebuffer * fb,const struct drm_mode_fb_cmd2 * mode_cmd,struct drm_gem_object * obj)165 static int psb_framebuffer_init(struct drm_device *dev,
166 struct drm_framebuffer *fb,
167 const struct drm_mode_fb_cmd2 *mode_cmd,
168 struct drm_gem_object *obj)
169 {
170 const struct drm_format_info *info;
171 int ret;
172
173 /*
174 * Reject unknown formats, YUV formats, and formats with more than
175 * 4 bytes per pixel.
176 */
177 info = drm_get_format_info(dev, mode_cmd);
178 if (!info || !info->depth || info->cpp[0] > 4)
179 return -EINVAL;
180
181 if (mode_cmd->pitches[0] & 63)
182 return -EINVAL;
183
184 drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
185 fb->obj[0] = obj;
186 ret = drm_framebuffer_init(dev, fb, &psb_fb_funcs);
187 if (ret) {
188 dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
189 return ret;
190 }
191 return 0;
192 }
193
194 /**
195 * psb_framebuffer_create - create a framebuffer backed by gt
196 * @dev: our DRM device
197 * @mode_cmd: the description of the requested mode
198 * @obj: the backing object
199 *
200 * Create a framebuffer object backed by the gt, and fill in the
201 * boilerplate required
202 *
203 * TODO: review object references
204 */
205
psb_framebuffer_create(struct drm_device * dev,const struct drm_mode_fb_cmd2 * mode_cmd,struct drm_gem_object * obj)206 static struct drm_framebuffer *psb_framebuffer_create
207 (struct drm_device *dev,
208 const struct drm_mode_fb_cmd2 *mode_cmd,
209 struct drm_gem_object *obj)
210 {
211 struct drm_framebuffer *fb;
212 int ret;
213
214 fb = kzalloc(sizeof(*fb), GFP_KERNEL);
215 if (!fb)
216 return ERR_PTR(-ENOMEM);
217
218 ret = psb_framebuffer_init(dev, fb, mode_cmd, obj);
219 if (ret) {
220 kfree(fb);
221 return ERR_PTR(ret);
222 }
223 return fb;
224 }
225
226 /**
227 * psbfb_create - create a framebuffer
228 * @fb_helper: the framebuffer helper
229 * @sizes: specification of the layout
230 *
231 * Create a framebuffer to the specifications provided
232 */
psbfb_create(struct drm_fb_helper * fb_helper,struct drm_fb_helper_surface_size * sizes)233 static int psbfb_create(struct drm_fb_helper *fb_helper,
234 struct drm_fb_helper_surface_size *sizes)
235 {
236 struct drm_device *dev = fb_helper->dev;
237 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
238 struct pci_dev *pdev = to_pci_dev(dev->dev);
239 struct fb_info *info;
240 struct drm_framebuffer *fb;
241 struct drm_mode_fb_cmd2 mode_cmd;
242 int size;
243 int ret;
244 struct psb_gem_object *backing;
245 struct drm_gem_object *obj;
246 u32 bpp, depth;
247
248 mode_cmd.width = sizes->surface_width;
249 mode_cmd.height = sizes->surface_height;
250 bpp = sizes->surface_bpp;
251 depth = sizes->surface_depth;
252
253 /* No 24bit packed */
254 if (bpp == 24)
255 bpp = 32;
256
257 mode_cmd.pitches[0] = ALIGN(mode_cmd.width * DIV_ROUND_UP(bpp, 8), 64);
258
259 size = mode_cmd.pitches[0] * mode_cmd.height;
260 size = ALIGN(size, PAGE_SIZE);
261
262 /* Allocate the framebuffer in the GTT with stolen page backing */
263 backing = psb_gem_create(dev, size, "fb", true, PAGE_SIZE);
264 if (IS_ERR(backing))
265 return PTR_ERR(backing);
266 obj = &backing->base;
267
268 memset(dev_priv->vram_addr + backing->offset, 0, size);
269
270 info = drm_fb_helper_alloc_fbi(fb_helper);
271 if (IS_ERR(info)) {
272 ret = PTR_ERR(info);
273 goto err_drm_gem_object_put;
274 }
275
276 mode_cmd.pixel_format = drm_mode_legacy_fb_format(bpp, depth);
277
278 fb = psb_framebuffer_create(dev, &mode_cmd, obj);
279 if (IS_ERR(fb)) {
280 ret = PTR_ERR(fb);
281 goto err_drm_gem_object_put;
282 }
283
284 fb_helper->fb = fb;
285
286 info->fbops = &psbfb_unaccel_ops;
287
288 info->fix.smem_start = dev->mode_config.fb_base;
289 info->fix.smem_len = size;
290 info->fix.ywrapstep = 0;
291 info->fix.ypanstep = 0;
292
293 /* Accessed stolen memory directly */
294 info->screen_base = dev_priv->vram_addr + backing->offset;
295 info->screen_size = size;
296
297 if (dev_priv->gtt.stolen_size) {
298 info->apertures->ranges[0].base = dev->mode_config.fb_base;
299 info->apertures->ranges[0].size = dev_priv->gtt.stolen_size;
300 }
301
302 drm_fb_helper_fill_info(info, fb_helper, sizes);
303
304 info->fix.mmio_start = pci_resource_start(pdev, 0);
305 info->fix.mmio_len = pci_resource_len(pdev, 0);
306
307 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
308
309 dev_dbg(dev->dev, "allocated %dx%d fb\n", fb->width, fb->height);
310
311 return 0;
312
313 err_drm_gem_object_put:
314 drm_gem_object_put(obj);
315 return ret;
316 }
317
318 /**
319 * psb_user_framebuffer_create - create framebuffer
320 * @dev: our DRM device
321 * @filp: client file
322 * @cmd: mode request
323 *
324 * Create a new framebuffer backed by a userspace GEM object
325 */
psb_user_framebuffer_create(struct drm_device * dev,struct drm_file * filp,const struct drm_mode_fb_cmd2 * cmd)326 static struct drm_framebuffer *psb_user_framebuffer_create
327 (struct drm_device *dev, struct drm_file *filp,
328 const struct drm_mode_fb_cmd2 *cmd)
329 {
330 struct drm_gem_object *obj;
331 struct drm_framebuffer *fb;
332
333 /*
334 * Find the GEM object and thus the gtt range object that is
335 * to back this space
336 */
337 obj = drm_gem_object_lookup(filp, cmd->handles[0]);
338 if (obj == NULL)
339 return ERR_PTR(-ENOENT);
340
341 /* Let the core code do all the work */
342 fb = psb_framebuffer_create(dev, cmd, obj);
343 if (IS_ERR(fb))
344 drm_gem_object_put(obj);
345
346 return fb;
347 }
348
psbfb_probe(struct drm_fb_helper * fb_helper,struct drm_fb_helper_surface_size * sizes)349 static int psbfb_probe(struct drm_fb_helper *fb_helper,
350 struct drm_fb_helper_surface_size *sizes)
351 {
352 struct drm_device *dev = fb_helper->dev;
353 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
354 unsigned int fb_size;
355 int bytespp;
356
357 bytespp = sizes->surface_bpp / 8;
358 if (bytespp == 3) /* no 24bit packed */
359 bytespp = 4;
360
361 /* If the mode will not fit in 32bit then switch to 16bit to get
362 a console on full resolution. The X mode setting server will
363 allocate its own 32bit GEM framebuffer */
364 fb_size = ALIGN(sizes->surface_width * bytespp, 64) *
365 sizes->surface_height;
366 fb_size = ALIGN(fb_size, PAGE_SIZE);
367
368 if (fb_size > dev_priv->vram_stolen_size) {
369 sizes->surface_bpp = 16;
370 sizes->surface_depth = 16;
371 }
372
373 return psbfb_create(fb_helper, sizes);
374 }
375
376 static const struct drm_fb_helper_funcs psb_fb_helper_funcs = {
377 .fb_probe = psbfb_probe,
378 };
379
psb_fbdev_destroy(struct drm_device * dev,struct drm_fb_helper * fb_helper)380 static int psb_fbdev_destroy(struct drm_device *dev,
381 struct drm_fb_helper *fb_helper)
382 {
383 struct drm_framebuffer *fb = fb_helper->fb;
384
385 drm_fb_helper_unregister_fbi(fb_helper);
386
387 drm_fb_helper_fini(fb_helper);
388 drm_framebuffer_unregister_private(fb);
389 drm_framebuffer_cleanup(fb);
390
391 if (fb->obj[0])
392 drm_gem_object_put(fb->obj[0]);
393 kfree(fb);
394
395 return 0;
396 }
397
psb_fbdev_init(struct drm_device * dev)398 int psb_fbdev_init(struct drm_device *dev)
399 {
400 struct drm_fb_helper *fb_helper;
401 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
402 int ret;
403
404 fb_helper = kzalloc(sizeof(*fb_helper), GFP_KERNEL);
405 if (!fb_helper) {
406 dev_err(dev->dev, "no memory\n");
407 return -ENOMEM;
408 }
409
410 dev_priv->fb_helper = fb_helper;
411
412 drm_fb_helper_prepare(dev, fb_helper, &psb_fb_helper_funcs);
413
414 ret = drm_fb_helper_init(dev, fb_helper);
415 if (ret)
416 goto free;
417
418 /* disable all the possible outputs/crtcs before entering KMS mode */
419 drm_helper_disable_unused_functions(dev);
420
421 ret = drm_fb_helper_initial_config(fb_helper, 32);
422 if (ret)
423 goto fini;
424
425 return 0;
426
427 fini:
428 drm_fb_helper_fini(fb_helper);
429 free:
430 kfree(fb_helper);
431 return ret;
432 }
433
psb_fbdev_fini(struct drm_device * dev)434 static void psb_fbdev_fini(struct drm_device *dev)
435 {
436 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
437
438 if (!dev_priv->fb_helper)
439 return;
440
441 psb_fbdev_destroy(dev, dev_priv->fb_helper);
442 kfree(dev_priv->fb_helper);
443 dev_priv->fb_helper = NULL;
444 }
445
446 static const struct drm_mode_config_funcs psb_mode_funcs = {
447 .fb_create = psb_user_framebuffer_create,
448 .output_poll_changed = drm_fb_helper_output_poll_changed,
449 };
450
psb_setup_outputs(struct drm_device * dev)451 static void psb_setup_outputs(struct drm_device *dev)
452 {
453 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
454 struct drm_connector_list_iter conn_iter;
455 struct drm_connector *connector;
456
457 drm_mode_create_scaling_mode_property(dev);
458
459 /* It is ok for this to fail - we just don't get backlight control */
460 if (!dev_priv->backlight_property)
461 dev_priv->backlight_property = drm_property_create_range(dev, 0,
462 "backlight", 0, 100);
463 dev_priv->ops->output_init(dev);
464
465 drm_connector_list_iter_begin(dev, &conn_iter);
466 drm_for_each_connector_iter(connector, &conn_iter) {
467 struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
468 struct drm_encoder *encoder = &gma_encoder->base;
469 int crtc_mask = 0, clone_mask = 0;
470
471 /* valid crtcs */
472 switch (gma_encoder->type) {
473 case INTEL_OUTPUT_ANALOG:
474 crtc_mask = (1 << 0);
475 clone_mask = (1 << INTEL_OUTPUT_ANALOG);
476 break;
477 case INTEL_OUTPUT_SDVO:
478 crtc_mask = dev_priv->ops->sdvo_mask;
479 clone_mask = 0;
480 break;
481 case INTEL_OUTPUT_LVDS:
482 crtc_mask = dev_priv->ops->lvds_mask;
483 clone_mask = 0;
484 break;
485 case INTEL_OUTPUT_MIPI:
486 crtc_mask = (1 << 0);
487 clone_mask = 0;
488 break;
489 case INTEL_OUTPUT_MIPI2:
490 crtc_mask = (1 << 2);
491 clone_mask = 0;
492 break;
493 case INTEL_OUTPUT_HDMI:
494 crtc_mask = dev_priv->ops->hdmi_mask;
495 clone_mask = (1 << INTEL_OUTPUT_HDMI);
496 break;
497 case INTEL_OUTPUT_DISPLAYPORT:
498 crtc_mask = (1 << 0) | (1 << 1);
499 clone_mask = 0;
500 break;
501 case INTEL_OUTPUT_EDP:
502 crtc_mask = (1 << 1);
503 clone_mask = 0;
504 }
505 encoder->possible_crtcs = crtc_mask;
506 encoder->possible_clones =
507 gma_connector_clones(dev, clone_mask);
508 }
509 drm_connector_list_iter_end(&conn_iter);
510 }
511
psb_modeset_init(struct drm_device * dev)512 void psb_modeset_init(struct drm_device *dev)
513 {
514 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
515 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
516 struct pci_dev *pdev = to_pci_dev(dev->dev);
517 int i;
518
519 if (drmm_mode_config_init(dev))
520 return;
521
522 dev->mode_config.min_width = 0;
523 dev->mode_config.min_height = 0;
524
525 dev->mode_config.funcs = &psb_mode_funcs;
526
527 /* set memory base */
528 /* Oaktrail and Poulsbo should use BAR 2*/
529 pci_read_config_dword(pdev, PSB_BSM, (u32 *)&(dev->mode_config.fb_base));
530
531 /* num pipes is 2 for PSB but 1 for Mrst */
532 for (i = 0; i < dev_priv->num_pipe; i++)
533 psb_intel_crtc_init(dev, i, mode_dev);
534
535 dev->mode_config.max_width = 4096;
536 dev->mode_config.max_height = 4096;
537
538 psb_setup_outputs(dev);
539
540 if (dev_priv->ops->errata)
541 dev_priv->ops->errata(dev);
542
543 dev_priv->modeset = true;
544 }
545
psb_modeset_cleanup(struct drm_device * dev)546 void psb_modeset_cleanup(struct drm_device *dev)
547 {
548 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
549 if (dev_priv->modeset) {
550 drm_kms_helper_poll_fini(dev);
551 psb_fbdev_fini(dev);
552 }
553 }
554