1 /**************************************************************************
2 * Copyright (c) 2007-2011, Intel Corporation.
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18 **************************************************************************/
20 #include <linux/module.h>
21 #include <linux/kernel.h>
22 #include <linux/errno.h>
23 #include <linux/string.h>
24 #include <linux/pfn_t.h>
26 #include <linux/tty.h>
27 #include <linux/slab.h>
28 #include <linux/delay.h>
30 #include <linux/init.h>
31 #include <linux/console.h>
35 #include <drm/drm_crtc.h>
36 #include <drm/drm_fb_helper.h>
39 #include "psb_intel_reg.h"
40 #include "psb_intel_drv.h"
41 #include "framebuffer.h"
44 static void psb_user_framebuffer_destroy(struct drm_framebuffer *fb);
45 static int psb_user_framebuffer_create_handle(struct drm_framebuffer *fb,
46 struct drm_file *file_priv,
47 unsigned int *handle);
49 static const struct drm_framebuffer_funcs psb_fb_funcs = {
50 .destroy = psb_user_framebuffer_destroy,
51 .create_handle = psb_user_framebuffer_create_handle,
54 #define CMAP_TOHW(_val, _width) ((((_val) << (_width)) + 0x7FFF - (_val)) >> 16)
56 static int psbfb_setcolreg(unsigned regno, unsigned red, unsigned green,
57 unsigned blue, unsigned transp,
60 struct psb_fbdev *fbdev = info->par;
61 struct drm_framebuffer *fb = fbdev->psb_fb_helper.fb;
70 red = CMAP_TOHW(red, info->var.red.length);
71 blue = CMAP_TOHW(blue, info->var.blue.length);
72 green = CMAP_TOHW(green, info->var.green.length);
73 transp = CMAP_TOHW(transp, info->var.transp.length);
75 v = (red << info->var.red.offset) |
76 (green << info->var.green.offset) |
77 (blue << info->var.blue.offset) |
78 (transp << info->var.transp.offset);
81 switch (fb->bits_per_pixel) {
83 ((uint32_t *) info->pseudo_palette)[regno] = v;
87 ((uint32_t *) info->pseudo_palette)[regno] = v;
95 static int psbfb_pan(struct fb_var_screeninfo *var, struct fb_info *info)
97 struct psb_fbdev *fbdev = info->par;
98 struct psb_framebuffer *psbfb = &fbdev->pfb;
99 struct drm_device *dev = psbfb->base.dev;
102 * We have to poke our nose in here. The core fb code assumes
103 * panning is part of the hardware that can be invoked before
104 * the actual fb is mapped. In our case that isn't quite true.
106 if (psbfb->gtt->npage) {
107 /* GTT roll shifts in 4K pages, we need to shift the right
109 int pages = info->fix.line_length >> 12;
110 psb_gtt_roll(dev, psbfb->gtt, var->yoffset * pages);
115 static int psbfb_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
117 struct psb_framebuffer *psbfb = vma->vm_private_data;
118 struct drm_device *dev = psbfb->base.dev;
119 struct drm_psb_private *dev_priv = dev->dev_private;
122 unsigned long address;
125 unsigned long phys_addr = (unsigned long)dev_priv->stolen_base +
128 page_num = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
129 address = (unsigned long)vmf->virtual_address - (vmf->pgoff << PAGE_SHIFT);
131 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
133 for (i = 0; i < page_num; i++) {
134 pfn = (phys_addr >> PAGE_SHIFT);
136 ret = vm_insert_mixed(vma, address,
137 __pfn_to_pfn_t(pfn, PFN_DEV));
138 if (unlikely((ret == -EBUSY) || (ret != 0 && i > 0)))
140 else if (unlikely(ret != 0)) {
141 ret = (ret == -ENOMEM) ? VM_FAULT_OOM : VM_FAULT_SIGBUS;
144 address += PAGE_SIZE;
145 phys_addr += PAGE_SIZE;
147 return VM_FAULT_NOPAGE;
150 static void psbfb_vm_open(struct vm_area_struct *vma)
154 static void psbfb_vm_close(struct vm_area_struct *vma)
158 static const struct vm_operations_struct psbfb_vm_ops = {
159 .fault = psbfb_vm_fault,
160 .open = psbfb_vm_open,
161 .close = psbfb_vm_close
164 static int psbfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
166 struct psb_fbdev *fbdev = info->par;
167 struct psb_framebuffer *psbfb = &fbdev->pfb;
169 if (vma->vm_pgoff != 0)
171 if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
174 if (!psbfb->addr_space)
175 psbfb->addr_space = vma->vm_file->f_mapping;
177 * If this is a GEM object then info->screen_base is the virtual
178 * kernel remapping of the object. FIXME: Review if this is
179 * suitable for our mmap work
181 vma->vm_ops = &psbfb_vm_ops;
182 vma->vm_private_data = (void *)psbfb;
183 vma->vm_flags |= VM_IO | VM_MIXEDMAP | VM_DONTEXPAND | VM_DONTDUMP;
187 static int psbfb_ioctl(struct fb_info *info, unsigned int cmd,
193 static struct fb_ops psbfb_ops = {
194 .owner = THIS_MODULE,
195 .fb_check_var = drm_fb_helper_check_var,
196 .fb_set_par = drm_fb_helper_set_par,
197 .fb_blank = drm_fb_helper_blank,
198 .fb_setcolreg = psbfb_setcolreg,
199 .fb_fillrect = drm_fb_helper_cfb_fillrect,
200 .fb_copyarea = psbfb_copyarea,
201 .fb_imageblit = drm_fb_helper_cfb_imageblit,
202 .fb_mmap = psbfb_mmap,
203 .fb_sync = psbfb_sync,
204 .fb_ioctl = psbfb_ioctl,
207 static struct fb_ops psbfb_roll_ops = {
208 .owner = THIS_MODULE,
209 .fb_check_var = drm_fb_helper_check_var,
210 .fb_set_par = drm_fb_helper_set_par,
211 .fb_blank = drm_fb_helper_blank,
212 .fb_setcolreg = psbfb_setcolreg,
213 .fb_fillrect = drm_fb_helper_cfb_fillrect,
214 .fb_copyarea = drm_fb_helper_cfb_copyarea,
215 .fb_imageblit = drm_fb_helper_cfb_imageblit,
216 .fb_pan_display = psbfb_pan,
217 .fb_mmap = psbfb_mmap,
218 .fb_ioctl = psbfb_ioctl,
221 static struct fb_ops psbfb_unaccel_ops = {
222 .owner = THIS_MODULE,
223 .fb_check_var = drm_fb_helper_check_var,
224 .fb_set_par = drm_fb_helper_set_par,
225 .fb_blank = drm_fb_helper_blank,
226 .fb_setcolreg = psbfb_setcolreg,
227 .fb_fillrect = drm_fb_helper_cfb_fillrect,
228 .fb_copyarea = drm_fb_helper_cfb_copyarea,
229 .fb_imageblit = drm_fb_helper_cfb_imageblit,
230 .fb_mmap = psbfb_mmap,
231 .fb_ioctl = psbfb_ioctl,
235 * psb_framebuffer_init - initialize a framebuffer
236 * @dev: our DRM device
237 * @fb: framebuffer to set up
238 * @mode_cmd: mode description
239 * @gt: backing object
241 * Configure and fill in the boilerplate for our frame buffer. Return
242 * 0 on success or an error code if we fail.
244 static int psb_framebuffer_init(struct drm_device *dev,
245 struct psb_framebuffer *fb,
246 const struct drm_mode_fb_cmd2 *mode_cmd,
247 struct gtt_range *gt)
252 drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
254 if (mode_cmd->pitches[0] & 63)
265 drm_helper_mode_fill_fb_struct(&fb->base, mode_cmd);
267 ret = drm_framebuffer_init(dev, &fb->base, &psb_fb_funcs);
269 dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
276 * psb_framebuffer_create - create a framebuffer backed by gt
277 * @dev: our DRM device
278 * @mode_cmd: the description of the requested mode
279 * @gt: the backing object
281 * Create a framebuffer object backed by the gt, and fill in the
282 * boilerplate required
284 * TODO: review object references
287 static struct drm_framebuffer *psb_framebuffer_create
288 (struct drm_device *dev,
289 const struct drm_mode_fb_cmd2 *mode_cmd,
290 struct gtt_range *gt)
292 struct psb_framebuffer *fb;
295 fb = kzalloc(sizeof(*fb), GFP_KERNEL);
297 return ERR_PTR(-ENOMEM);
299 ret = psb_framebuffer_init(dev, fb, mode_cmd, gt);
308 * psbfb_alloc - allocate frame buffer memory
309 * @dev: the DRM device
310 * @aligned_size: space needed
311 * @force: fall back to GEM buffers if need be
313 * Allocate the frame buffer. In the usual case we get a GTT range that
314 * is stolen memory backed and life is simple. If there isn't sufficient
315 * we fail as we don't have the virtual mapping space to really vmap it
316 * and the kernel console code can't handle non linear framebuffers.
318 * Re-address this as and if the framebuffer layer grows this ability.
320 static struct gtt_range *psbfb_alloc(struct drm_device *dev, int aligned_size)
322 struct gtt_range *backing;
323 /* Begin by trying to use stolen memory backing */
324 backing = psb_gtt_alloc_range(dev, aligned_size, "fb", 1, PAGE_SIZE);
326 drm_gem_private_object_init(dev, &backing->gem, aligned_size);
333 * psbfb_create - create a framebuffer
334 * @fbdev: the framebuffer device
335 * @sizes: specification of the layout
337 * Create a framebuffer to the specifications provided
339 static int psbfb_create(struct psb_fbdev *fbdev,
340 struct drm_fb_helper_surface_size *sizes)
342 struct drm_device *dev = fbdev->psb_fb_helper.dev;
343 struct drm_psb_private *dev_priv = dev->dev_private;
344 struct fb_info *info;
345 struct drm_framebuffer *fb;
346 struct psb_framebuffer *psbfb = &fbdev->pfb;
347 struct drm_mode_fb_cmd2 mode_cmd;
350 struct gtt_range *backing;
355 mode_cmd.width = sizes->surface_width;
356 mode_cmd.height = sizes->surface_height;
357 bpp = sizes->surface_bpp;
358 depth = sizes->surface_depth;
360 /* No 24bit packed */
366 * Acceleration via the GTT requires pitch to be
367 * power of two aligned. Preferably page but less
368 * is ok with some fonts
370 mode_cmd.pitches[0] = ALIGN(mode_cmd.width * ((bpp + 7) / 8), 4096 >> pitch_lines);
372 size = mode_cmd.pitches[0] * mode_cmd.height;
373 size = ALIGN(size, PAGE_SIZE);
375 /* Allocate the fb in the GTT with stolen page backing */
376 backing = psbfb_alloc(dev, size);
383 } while (backing == NULL && pitch_lines <= 16);
385 /* The final pitch we accepted if we succeeded */
388 if (backing == NULL) {
390 * We couldn't get the space we wanted, fall back to the
391 * display engine requirement instead. The HW requires
392 * the pitch to be 64 byte aligned
395 gtt_roll = 0; /* Don't use GTT accelerated scrolling */
398 mode_cmd.pitches[0] = ALIGN(mode_cmd.width * ((bpp + 7) / 8), 64);
400 size = mode_cmd.pitches[0] * mode_cmd.height;
401 size = ALIGN(size, PAGE_SIZE);
403 /* Allocate the framebuffer in the GTT with stolen page backing */
404 backing = psbfb_alloc(dev, size);
409 memset(dev_priv->vram_addr + backing->offset, 0, size);
411 info = drm_fb_helper_alloc_fbi(&fbdev->psb_fb_helper);
418 mode_cmd.pixel_format = drm_mode_legacy_fb_format(bpp, depth);
420 ret = psb_framebuffer_init(dev, psbfb, &mode_cmd, backing);
427 fbdev->psb_fb_helper.fb = fb;
429 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
430 strcpy(info->fix.id, "psbdrmfb");
432 info->flags = FBINFO_DEFAULT;
433 if (dev_priv->ops->accel_2d && pitch_lines > 8) /* 2D engine */
434 info->fbops = &psbfb_ops;
435 else if (gtt_roll) { /* GTT rolling seems best */
436 info->fbops = &psbfb_roll_ops;
437 info->flags |= FBINFO_HWACCEL_YPAN;
438 } else /* Software */
439 info->fbops = &psbfb_unaccel_ops;
441 info->fix.smem_start = dev->mode_config.fb_base;
442 info->fix.smem_len = size;
443 info->fix.ywrapstep = gtt_roll;
444 info->fix.ypanstep = 0;
446 /* Accessed stolen memory directly */
447 info->screen_base = dev_priv->vram_addr + backing->offset;
448 info->screen_size = size;
450 if (dev_priv->gtt.stolen_size) {
451 info->apertures->ranges[0].base = dev->mode_config.fb_base;
452 info->apertures->ranges[0].size = dev_priv->gtt.stolen_size;
455 drm_fb_helper_fill_var(info, &fbdev->psb_fb_helper,
456 sizes->fb_width, sizes->fb_height);
458 info->fix.mmio_start = pci_resource_start(dev->pdev, 0);
459 info->fix.mmio_len = pci_resource_len(dev->pdev, 0);
461 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
463 dev_dbg(dev->dev, "allocated %dx%d fb\n",
464 psbfb->base.width, psbfb->base.height);
468 drm_fb_helper_release_fbi(&fbdev->psb_fb_helper);
470 psb_gtt_free_range(dev, backing);
475 * psb_user_framebuffer_create - create framebuffer
476 * @dev: our DRM device
480 * Create a new framebuffer backed by a userspace GEM object
482 static struct drm_framebuffer *psb_user_framebuffer_create
483 (struct drm_device *dev, struct drm_file *filp,
484 const struct drm_mode_fb_cmd2 *cmd)
487 struct drm_gem_object *obj;
490 * Find the GEM object and thus the gtt range object that is
493 obj = drm_gem_object_lookup(dev, filp, cmd->handles[0]);
495 return ERR_PTR(-ENOENT);
497 /* Let the core code do all the work */
498 r = container_of(obj, struct gtt_range, gem);
499 return psb_framebuffer_create(dev, cmd, r);
502 static void psbfb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
505 struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
507 gma_crtc->lut_r[regno] = red >> 8;
508 gma_crtc->lut_g[regno] = green >> 8;
509 gma_crtc->lut_b[regno] = blue >> 8;
512 static void psbfb_gamma_get(struct drm_crtc *crtc, u16 *red,
513 u16 *green, u16 *blue, int regno)
515 struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
517 *red = gma_crtc->lut_r[regno] << 8;
518 *green = gma_crtc->lut_g[regno] << 8;
519 *blue = gma_crtc->lut_b[regno] << 8;
522 static int psbfb_probe(struct drm_fb_helper *helper,
523 struct drm_fb_helper_surface_size *sizes)
525 struct psb_fbdev *psb_fbdev =
526 container_of(helper, struct psb_fbdev, psb_fb_helper);
527 struct drm_device *dev = psb_fbdev->psb_fb_helper.dev;
528 struct drm_psb_private *dev_priv = dev->dev_private;
531 bytespp = sizes->surface_bpp / 8;
532 if (bytespp == 3) /* no 24bit packed */
535 /* If the mode will not fit in 32bit then switch to 16bit to get
536 a console on full resolution. The X mode setting server will
537 allocate its own 32bit GEM framebuffer */
538 if (ALIGN(sizes->fb_width * bytespp, 64) * sizes->fb_height >
539 dev_priv->vram_stolen_size) {
540 sizes->surface_bpp = 16;
541 sizes->surface_depth = 16;
544 return psbfb_create(psb_fbdev, sizes);
547 static const struct drm_fb_helper_funcs psb_fb_helper_funcs = {
548 .gamma_set = psbfb_gamma_set,
549 .gamma_get = psbfb_gamma_get,
550 .fb_probe = psbfb_probe,
553 static int psb_fbdev_destroy(struct drm_device *dev, struct psb_fbdev *fbdev)
555 struct psb_framebuffer *psbfb = &fbdev->pfb;
557 drm_fb_helper_unregister_fbi(&fbdev->psb_fb_helper);
558 drm_fb_helper_release_fbi(&fbdev->psb_fb_helper);
560 drm_fb_helper_fini(&fbdev->psb_fb_helper);
561 drm_framebuffer_unregister_private(&psbfb->base);
562 drm_framebuffer_cleanup(&psbfb->base);
565 drm_gem_object_unreference_unlocked(&psbfb->gtt->gem);
569 int psb_fbdev_init(struct drm_device *dev)
571 struct psb_fbdev *fbdev;
572 struct drm_psb_private *dev_priv = dev->dev_private;
575 fbdev = kzalloc(sizeof(struct psb_fbdev), GFP_KERNEL);
577 dev_err(dev->dev, "no memory\n");
581 dev_priv->fbdev = fbdev;
583 drm_fb_helper_prepare(dev, &fbdev->psb_fb_helper, &psb_fb_helper_funcs);
585 ret = drm_fb_helper_init(dev, &fbdev->psb_fb_helper,
586 dev_priv->ops->crtcs, INTELFB_CONN_LIMIT);
590 ret = drm_fb_helper_single_add_all_connectors(&fbdev->psb_fb_helper);
594 /* disable all the possible outputs/crtcs before entering KMS mode */
595 drm_helper_disable_unused_functions(dev);
597 ret = drm_fb_helper_initial_config(&fbdev->psb_fb_helper, 32);
604 drm_fb_helper_fini(&fbdev->psb_fb_helper);
610 static void psb_fbdev_fini(struct drm_device *dev)
612 struct drm_psb_private *dev_priv = dev->dev_private;
614 if (!dev_priv->fbdev)
617 psb_fbdev_destroy(dev, dev_priv->fbdev);
618 kfree(dev_priv->fbdev);
619 dev_priv->fbdev = NULL;
622 static void psbfb_output_poll_changed(struct drm_device *dev)
624 struct drm_psb_private *dev_priv = dev->dev_private;
625 struct psb_fbdev *fbdev = (struct psb_fbdev *)dev_priv->fbdev;
626 drm_fb_helper_hotplug_event(&fbdev->psb_fb_helper);
630 * psb_user_framebuffer_create_handle - add hamdle to a framebuffer
632 * @file_priv: our DRM file
633 * @handle: returned handle
635 * Our framebuffer object is a GTT range which also contains a GEM
636 * object. We need to turn it into a handle for userspace. GEM will do
639 static int psb_user_framebuffer_create_handle(struct drm_framebuffer *fb,
640 struct drm_file *file_priv,
641 unsigned int *handle)
643 struct psb_framebuffer *psbfb = to_psb_fb(fb);
644 struct gtt_range *r = psbfb->gtt;
645 return drm_gem_handle_create(file_priv, &r->gem, handle);
649 * psb_user_framebuffer_destroy - destruct user created fb
652 * User framebuffers are backed by GEM objects so all we have to do is
653 * clean up a bit and drop the reference, GEM will handle the fallout
655 static void psb_user_framebuffer_destroy(struct drm_framebuffer *fb)
657 struct psb_framebuffer *psbfb = to_psb_fb(fb);
658 struct gtt_range *r = psbfb->gtt;
660 /* Let DRM do its clean up */
661 drm_framebuffer_cleanup(fb);
662 /* We are no longer using the resource in GEM */
663 drm_gem_object_unreference_unlocked(&r->gem);
667 static const struct drm_mode_config_funcs psb_mode_funcs = {
668 .fb_create = psb_user_framebuffer_create,
669 .output_poll_changed = psbfb_output_poll_changed,
672 static void psb_setup_outputs(struct drm_device *dev)
674 struct drm_psb_private *dev_priv = dev->dev_private;
675 struct drm_connector *connector;
677 drm_mode_create_scaling_mode_property(dev);
679 /* It is ok for this to fail - we just don't get backlight control */
680 if (!dev_priv->backlight_property)
681 dev_priv->backlight_property = drm_property_create_range(dev, 0,
682 "backlight", 0, 100);
683 dev_priv->ops->output_init(dev);
685 list_for_each_entry(connector, &dev->mode_config.connector_list,
687 struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
688 struct drm_encoder *encoder = &gma_encoder->base;
689 int crtc_mask = 0, clone_mask = 0;
692 switch (gma_encoder->type) {
693 case INTEL_OUTPUT_ANALOG:
694 crtc_mask = (1 << 0);
695 clone_mask = (1 << INTEL_OUTPUT_ANALOG);
697 case INTEL_OUTPUT_SDVO:
698 crtc_mask = dev_priv->ops->sdvo_mask;
699 clone_mask = (1 << INTEL_OUTPUT_SDVO);
701 case INTEL_OUTPUT_LVDS:
702 crtc_mask = dev_priv->ops->lvds_mask;
703 clone_mask = (1 << INTEL_OUTPUT_LVDS);
705 case INTEL_OUTPUT_MIPI:
706 crtc_mask = (1 << 0);
707 clone_mask = (1 << INTEL_OUTPUT_MIPI);
709 case INTEL_OUTPUT_MIPI2:
710 crtc_mask = (1 << 2);
711 clone_mask = (1 << INTEL_OUTPUT_MIPI2);
713 case INTEL_OUTPUT_HDMI:
714 crtc_mask = dev_priv->ops->hdmi_mask;
715 clone_mask = (1 << INTEL_OUTPUT_HDMI);
717 case INTEL_OUTPUT_DISPLAYPORT:
718 crtc_mask = (1 << 0) | (1 << 1);
719 clone_mask = (1 << INTEL_OUTPUT_DISPLAYPORT);
721 case INTEL_OUTPUT_EDP:
722 crtc_mask = (1 << 1);
723 clone_mask = (1 << INTEL_OUTPUT_EDP);
725 encoder->possible_crtcs = crtc_mask;
726 encoder->possible_clones =
727 gma_connector_clones(dev, clone_mask);
731 void psb_modeset_init(struct drm_device *dev)
733 struct drm_psb_private *dev_priv = dev->dev_private;
734 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
737 drm_mode_config_init(dev);
739 dev->mode_config.min_width = 0;
740 dev->mode_config.min_height = 0;
742 dev->mode_config.funcs = &psb_mode_funcs;
744 /* set memory base */
745 /* Oaktrail and Poulsbo should use BAR 2*/
746 pci_read_config_dword(dev->pdev, PSB_BSM, (u32 *)
747 &(dev->mode_config.fb_base));
749 /* num pipes is 2 for PSB but 1 for Mrst */
750 for (i = 0; i < dev_priv->num_pipe; i++)
751 psb_intel_crtc_init(dev, i, mode_dev);
753 dev->mode_config.max_width = 4096;
754 dev->mode_config.max_height = 4096;
756 psb_setup_outputs(dev);
758 if (dev_priv->ops->errata)
759 dev_priv->ops->errata(dev);
761 dev_priv->modeset = true;
764 void psb_modeset_cleanup(struct drm_device *dev)
766 struct drm_psb_private *dev_priv = dev->dev_private;
767 if (dev_priv->modeset) {
768 drm_kms_helper_poll_fini(dev);
770 drm_mode_config_cleanup(dev);