drm/gma500/framebuffer.c

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /**************************************************************************
0003  * Copyright (c) 2007-2011, Intel Corporation.
0004  * All Rights Reserved.
0005  *
0006  **************************************************************************/
0007
0008 #include <linux/console.h>
0009 #include <linux/delay.h>
0010 #include <linux/errno.h>
0011 #include <linux/init.h>
0012 #include <linux/kernel.h>
0013 #include <linux/mm.h>
0014 #include <linux/module.h>
0015 #include <linux/pfn_t.h>
0016 #include <linux/slab.h>
0017 #include <linux/string.h>
0018 #include <linux/tty.h>
0019
0020 #include <drm/drm.h>
0021 #include <drm/drm_crtc.h>
0022 #include <drm/drm_fb_helper.h>
0023 #include <drm/drm_fourcc.h>
0024 #include <drm/drm_framebuffer.h>
0025 #include <drm/drm_gem_framebuffer_helper.h>
0026
0027 #include "framebuffer.h"
0028 #include "gem.h"
0029 #include "psb_drv.h"
0030 #include "psb_intel_drv.h"
0031 #include "psb_intel_reg.h"
0032
0033 static const struct drm_framebuffer_funcs psb_fb_funcs = {
0034     .destroy = drm_gem_fb_destroy,
0035     .create_handle = drm_gem_fb_create_handle,
0036 };
0037
0038 #define CMAP_TOHW(_val, _width) ((((_val) << (_width)) + 0x7FFF - (_val)) >> 16)
0039
0040 static int psbfb_setcolreg(unsigned regno, unsigned red, unsigned green,
0041                unsigned blue, unsigned transp,
0042                struct fb_info *info)
0043 {
0044     struct drm_fb_helper *fb_helper = info->par;
0045     struct drm_framebuffer *fb = fb_helper->fb;
0046     uint32_t v;
0047
0048     if (!fb)
0049         return -ENOMEM;
0050
0051     if (regno > 255)
0052         return 1;
0053
0054     red = CMAP_TOHW(red, info->var.red.length);
0055     blue = CMAP_TOHW(blue, info->var.blue.length);
0056     green = CMAP_TOHW(green, info->var.green.length);
0057     transp = CMAP_TOHW(transp, info->var.transp.length);
0058
0059     v = (red << info->var.red.offset) |
0060         (green << info->var.green.offset) |
0061         (blue << info->var.blue.offset) |
0062         (transp << info->var.transp.offset);
0063
0064     if (regno < 16) {
0065         switch (fb->format->cpp[0] * 8) {
0066         case 16:
0067             ((uint32_t *) info->pseudo_palette)[regno] = v;
0068             break;
0069         case 24:
0070         case 32:
0071             ((uint32_t *) info->pseudo_palette)[regno] = v;
0072             break;
0073         }
0074     }
0075
0076     return 0;
0077 }
0078
0079 static vm_fault_t psbfb_vm_fault(struct vm_fault *vmf)
0080 {
0081     struct vm_area_struct *vma = vmf->vma;
0082     struct drm_framebuffer *fb = vma->vm_private_data;
0083     struct drm_device *dev = fb->dev;
0084     struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
0085     struct psb_gem_object *pobj = to_psb_gem_object(fb->obj[0]);
0086     int page_num;
0087     int i;
0088     unsigned long address;
0089     vm_fault_t ret = VM_FAULT_SIGBUS;
0090     unsigned long pfn;
0091     unsigned long phys_addr = (unsigned long)dev_priv->stolen_base + pobj->offset;
0092
0093     page_num = vma_pages(vma);
0094     address = vmf->address - (vmf->pgoff << PAGE_SHIFT);
0095
0096     vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
0097
0098     for (i = 0; i < page_num; i++) {
0099         pfn = (phys_addr >> PAGE_SHIFT);
0100
0101         ret = vmf_insert_mixed(vma, address,
0102                 __pfn_to_pfn_t(pfn, PFN_DEV));
0103         if (unlikely(ret & VM_FAULT_ERROR))
0104             break;
0105         address += PAGE_SIZE;
0106         phys_addr += PAGE_SIZE;
0107     }
0108     return ret;
0109 }
0110
0111 static void psbfb_vm_open(struct vm_area_struct *vma)
0112 {
0113 }
0114
0115 static void psbfb_vm_close(struct vm_area_struct *vma)
0116 {
0117 }
0118
0119 static const struct vm_operations_struct psbfb_vm_ops = {
0120     .fault  = psbfb_vm_fault,
0121     .open   = psbfb_vm_open,
0122     .close  = psbfb_vm_close
0123 };
0124
0125 static int psbfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
0126 {
0127     struct drm_fb_helper *fb_helper = info->par;
0128     struct drm_framebuffer *fb = fb_helper->fb;
0129
0130     if (vma->vm_pgoff != 0)
0131         return -EINVAL;
0132     if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
0133         return -EINVAL;
0134
0135     /*
0136      * If this is a GEM object then info->screen_base is the virtual
0137      * kernel remapping of the object. FIXME: Review if this is
0138      * suitable for our mmap work
0139      */
0140     vma->vm_ops = &psbfb_vm_ops;
0141     vma->vm_private_data = (void *)fb;
0142     vma->vm_flags |= VM_IO | VM_MIXEDMAP | VM_DONTEXPAND | VM_DONTDUMP;
0143     return 0;
0144 }
0145
0146 static const struct fb_ops psbfb_unaccel_ops = {
0147     .owner = THIS_MODULE,
0148     DRM_FB_HELPER_DEFAULT_OPS,
0149     .fb_setcolreg = psbfb_setcolreg,
0150     .fb_fillrect = drm_fb_helper_cfb_fillrect,
0151     .fb_copyarea = drm_fb_helper_cfb_copyarea,
0152     .fb_imageblit = drm_fb_helper_cfb_imageblit,
0153     .fb_mmap = psbfb_mmap,
0154 };
0155
0156 /**
0157  *  psb_framebuffer_init    -   initialize a framebuffer
0158  *  @dev: our DRM device
0159  *  @fb: framebuffer to set up
0160  *  @mode_cmd: mode description
0161  *  @obj: backing object
0162  *
0163  *  Configure and fill in the boilerplate for our frame buffer. Return
0164  *  0 on success or an error code if we fail.
0165  */
0166 static int psb_framebuffer_init(struct drm_device *dev,
0167                     struct drm_framebuffer *fb,
0168                     const struct drm_mode_fb_cmd2 *mode_cmd,
0169                     struct drm_gem_object *obj)
0170 {
0171     const struct drm_format_info *info;
0172     int ret;
0173
0174     /*
0175      * Reject unknown formats, YUV formats, and formats with more than
0176      * 4 bytes per pixel.
0177      */
0178     info = drm_get_format_info(dev, mode_cmd);
0179     if (!info || !info->depth || info->cpp[0] > 4)
0180         return -EINVAL;
0181
0182     if (mode_cmd->pitches[0] & 63)
0183         return -EINVAL;
0184
0185     drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
0186     fb->obj[0] = obj;
0187     ret = drm_framebuffer_init(dev, fb, &psb_fb_funcs);
0188     if (ret) {
0189         dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
0190         return ret;
0191     }
0192     return 0;
0193 }
0194
0195 /**
0196  *  psb_framebuffer_create  -   create a framebuffer backed by gt
0197  *  @dev: our DRM device
0198  *  @mode_cmd: the description of the requested mode
0199  *  @obj: the backing object
0200  *
0201  *  Create a framebuffer object backed by the gt, and fill in the
0202  *  boilerplate required
0203  *
0204  *  TODO: review object references
0205  */
0206
0207 static struct drm_framebuffer *psb_framebuffer_create
0208             (struct drm_device *dev,
0209              const struct drm_mode_fb_cmd2 *mode_cmd,
0210              struct drm_gem_object *obj)
0211 {
0212     struct drm_framebuffer *fb;
0213     int ret;
0214
0215     fb = kzalloc(sizeof(*fb), GFP_KERNEL);
0216     if (!fb)
0217         return ERR_PTR(-ENOMEM);
0218
0219     ret = psb_framebuffer_init(dev, fb, mode_cmd, obj);
0220     if (ret) {
0221         kfree(fb);
0222         return ERR_PTR(ret);
0223     }
0224     return fb;
0225 }
0226
0227 /**
0228  *  psbfb_create        -   create a framebuffer
0229  *  @fb_helper: the framebuffer helper
0230  *  @sizes: specification of the layout
0231  *
0232  *  Create a framebuffer to the specifications provided
0233  */
0234 static int psbfb_create(struct drm_fb_helper *fb_helper,
0235                 struct drm_fb_helper_surface_size *sizes)
0236 {
0237     struct drm_device *dev = fb_helper->dev;
0238     struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
0239     struct pci_dev *pdev = to_pci_dev(dev->dev);
0240     struct fb_info *info;
0241     struct drm_framebuffer *fb;
0242     struct drm_mode_fb_cmd2 mode_cmd;
0243     int size;
0244     int ret;
0245     struct psb_gem_object *backing;
0246     struct drm_gem_object *obj;
0247     u32 bpp, depth;
0248
0249     mode_cmd.width = sizes->surface_width;
0250     mode_cmd.height = sizes->surface_height;
0251     bpp = sizes->surface_bpp;
0252     depth = sizes->surface_depth;
0253
0254     /* No 24bit packed */
0255     if (bpp == 24)
0256         bpp = 32;
0257
0258     mode_cmd.pitches[0] = ALIGN(mode_cmd.width * DIV_ROUND_UP(bpp, 8), 64);
0259
0260     size = mode_cmd.pitches[0] * mode_cmd.height;
0261     size = ALIGN(size, PAGE_SIZE);
0262
0263     /* Allocate the framebuffer in the GTT with stolen page backing */
0264     backing = psb_gem_create(dev, size, "fb", true, PAGE_SIZE);
0265     if (IS_ERR(backing))
0266         return PTR_ERR(backing);
0267     obj = &backing->base;
0268
0269     memset(dev_priv->vram_addr + backing->offset, 0, size);
0270
0271     info = drm_fb_helper_alloc_fbi(fb_helper);
0272     if (IS_ERR(info)) {
0273         ret = PTR_ERR(info);
0274         goto err_drm_gem_object_put;
0275     }
0276
0277     mode_cmd.pixel_format = drm_mode_legacy_fb_format(bpp, depth);
0278
0279     fb = psb_framebuffer_create(dev, &mode_cmd, obj);
0280     if (IS_ERR(fb)) {
0281         ret = PTR_ERR(fb);
0282         goto err_drm_gem_object_put;
0283     }
0284
0285     fb_helper->fb = fb;
0286
0287     info->fbops = &psbfb_unaccel_ops;
0288
0289     info->fix.smem_start = dev->mode_config.fb_base;
0290     info->fix.smem_len = size;
0291     info->fix.ywrapstep = 0;
0292     info->fix.ypanstep = 0;
0293
0294     /* Accessed stolen memory directly */
0295     info->screen_base = dev_priv->vram_addr + backing->offset;
0296     info->screen_size = size;
0297
0298     if (dev_priv->gtt.stolen_size) {
0299         info->apertures->ranges[0].base = dev->mode_config.fb_base;
0300         info->apertures->ranges[0].size = dev_priv->gtt.stolen_size;
0301     }
0302
0303     drm_fb_helper_fill_info(info, fb_helper, sizes);
0304
0305     info->fix.mmio_start = pci_resource_start(pdev, 0);
0306     info->fix.mmio_len = pci_resource_len(pdev, 0);
0307
0308     /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
0309
0310     dev_dbg(dev->dev, "allocated %dx%d fb\n", fb->width, fb->height);
0311
0312     return 0;
0313
0314 err_drm_gem_object_put:
0315     drm_gem_object_put(obj);
0316     return ret;
0317 }
0318
0319 /**
0320  *  psb_user_framebuffer_create -   create framebuffer
0321  *  @dev: our DRM device
0322  *  @filp: client file
0323  *  @cmd: mode request
0324  *
0325  *  Create a new framebuffer backed by a userspace GEM object
0326  */
0327 static struct drm_framebuffer *psb_user_framebuffer_create
0328             (struct drm_device *dev, struct drm_file *filp,
0329              const struct drm_mode_fb_cmd2 *cmd)
0330 {
0331     struct drm_gem_object *obj;
0332     struct drm_framebuffer *fb;
0333
0334     /*
0335      *  Find the GEM object and thus the gtt range object that is
0336      *  to back this space
0337      */
0338     obj = drm_gem_object_lookup(filp, cmd->handles[0]);
0339     if (obj == NULL)
0340         return ERR_PTR(-ENOENT);
0341
0342     /* Let the core code do all the work */
0343     fb = psb_framebuffer_create(dev, cmd, obj);
0344     if (IS_ERR(fb))
0345         drm_gem_object_put(obj);
0346
0347     return fb;
0348 }
0349
0350 static int psbfb_probe(struct drm_fb_helper *fb_helper,
0351                 struct drm_fb_helper_surface_size *sizes)
0352 {
0353     struct drm_device *dev = fb_helper->dev;
0354     struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
0355     unsigned int fb_size;
0356     int bytespp;
0357
0358     bytespp = sizes->surface_bpp / 8;
0359     if (bytespp == 3)   /* no 24bit packed */
0360         bytespp = 4;
0361
0362     /* If the mode will not fit in 32bit then switch to 16bit to get
0363        a console on full resolution. The X mode setting server will
0364        allocate its own 32bit GEM framebuffer */
0365     fb_size = ALIGN(sizes->surface_width * bytespp, 64) *
0366           sizes->surface_height;
0367     fb_size = ALIGN(fb_size, PAGE_SIZE);
0368
0369     if (fb_size > dev_priv->vram_stolen_size) {
0370                 sizes->surface_bpp = 16;
0371                 sizes->surface_depth = 16;
0372         }
0373
0374     return psbfb_create(fb_helper, sizes);
0375 }
0376
0377 static const struct drm_fb_helper_funcs psb_fb_helper_funcs = {
0378     .fb_probe = psbfb_probe,
0379 };
0380
0381 static int psb_fbdev_destroy(struct drm_device *dev,
0382                  struct drm_fb_helper *fb_helper)
0383 {
0384     struct drm_framebuffer *fb = fb_helper->fb;
0385
0386     drm_fb_helper_unregister_fbi(fb_helper);
0387
0388     drm_fb_helper_fini(fb_helper);
0389     drm_framebuffer_unregister_private(fb);
0390     drm_framebuffer_cleanup(fb);
0391
0392     if (fb->obj[0])
0393         drm_gem_object_put(fb->obj[0]);
0394     kfree(fb);
0395
0396     return 0;
0397 }
0398
0399 int psb_fbdev_init(struct drm_device *dev)
0400 {
0401     struct drm_fb_helper *fb_helper;
0402     struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
0403     int ret;
0404
0405     fb_helper = kzalloc(sizeof(*fb_helper), GFP_KERNEL);
0406     if (!fb_helper) {
0407         dev_err(dev->dev, "no memory\n");
0408         return -ENOMEM;
0409     }
0410
0411     dev_priv->fb_helper = fb_helper;
0412
0413     drm_fb_helper_prepare(dev, fb_helper, &psb_fb_helper_funcs);
0414
0415     ret = drm_fb_helper_init(dev, fb_helper);
0416     if (ret)
0417         goto free;
0418
0419     /* disable all the possible outputs/crtcs before entering KMS mode */
0420     drm_helper_disable_unused_functions(dev);
0421
0422     ret = drm_fb_helper_initial_config(fb_helper, 32);
0423     if (ret)
0424         goto fini;
0425
0426     return 0;
0427
0428 fini:
0429     drm_fb_helper_fini(fb_helper);
0430 free:
0431     kfree(fb_helper);
0432     return ret;
0433 }
0434
0435 static void psb_fbdev_fini(struct drm_device *dev)
0436 {
0437     struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
0438
0439     if (!dev_priv->fb_helper)
0440         return;
0441
0442     psb_fbdev_destroy(dev, dev_priv->fb_helper);
0443     kfree(dev_priv->fb_helper);
0444     dev_priv->fb_helper = NULL;
0445 }
0446
0447 static const struct drm_mode_config_funcs psb_mode_funcs = {
0448     .fb_create = psb_user_framebuffer_create,
0449     .output_poll_changed = drm_fb_helper_output_poll_changed,
0450 };
0451
0452 static void psb_setup_outputs(struct drm_device *dev)
0453 {
0454     struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
0455     struct drm_connector_list_iter conn_iter;
0456     struct drm_connector *connector;
0457
0458     drm_mode_create_scaling_mode_property(dev);
0459
0460     /* It is ok for this to fail - we just don't get backlight control */
0461     if (!dev_priv->backlight_property)
0462         dev_priv->backlight_property = drm_property_create_range(dev, 0,
0463                             "backlight", 0, 100);
0464     dev_priv->ops->output_init(dev);
0465
0466     drm_connector_list_iter_begin(dev, &conn_iter);
0467     drm_for_each_connector_iter(connector, &conn_iter) {
0468         struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
0469         struct drm_encoder *encoder = &gma_encoder->base;
0470         int crtc_mask = 0, clone_mask = 0;
0471
0472         /* valid crtcs */
0473         switch (gma_encoder->type) {
0474         case INTEL_OUTPUT_ANALOG:
0475             crtc_mask = (1 << 0);
0476             clone_mask = (1 << INTEL_OUTPUT_ANALOG);
0477             break;
0478         case INTEL_OUTPUT_SDVO:
0479             crtc_mask = dev_priv->ops->sdvo_mask;
0480             clone_mask = 0;
0481             break;
0482         case INTEL_OUTPUT_LVDS:
0483             crtc_mask = dev_priv->ops->lvds_mask;
0484             clone_mask = 0;
0485             break;
0486         case INTEL_OUTPUT_MIPI:
0487             crtc_mask = (1 << 0);
0488             clone_mask = 0;
0489             break;
0490         case INTEL_OUTPUT_MIPI2:
0491             crtc_mask = (1 << 2);
0492             clone_mask = 0;
0493             break;
0494         case INTEL_OUTPUT_HDMI:
0495             crtc_mask = dev_priv->ops->hdmi_mask;
0496             clone_mask = (1 << INTEL_OUTPUT_HDMI);
0497             break;
0498         case INTEL_OUTPUT_DISPLAYPORT:
0499             crtc_mask = (1 << 0) | (1 << 1);
0500             clone_mask = 0;
0501             break;
0502         case INTEL_OUTPUT_EDP:
0503             crtc_mask = (1 << 1);
0504             clone_mask = 0;
0505         }
0506         encoder->possible_crtcs = crtc_mask;
0507         encoder->possible_clones =
0508             gma_connector_clones(dev, clone_mask);
0509     }
0510     drm_connector_list_iter_end(&conn_iter);
0511 }
0512
0513 void psb_modeset_init(struct drm_device *dev)
0514 {
0515     struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
0516     struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
0517     struct pci_dev *pdev = to_pci_dev(dev->dev);
0518     int i;
0519
0520     if (drmm_mode_config_init(dev))
0521         return;
0522
0523     dev->mode_config.min_width = 0;
0524     dev->mode_config.min_height = 0;
0525
0526     dev->mode_config.funcs = &psb_mode_funcs;
0527
0528     /* set memory base */
0529     /* Oaktrail and Poulsbo should use BAR 2*/
0530     pci_read_config_dword(pdev, PSB_BSM, (u32 *)&(dev->mode_config.fb_base));
0531
0532     /* num pipes is 2 for PSB but 1 for Mrst */
0533     for (i = 0; i < dev_priv->num_pipe; i++)
0534         psb_intel_crtc_init(dev, i, mode_dev);
0535
0536     dev->mode_config.max_width = 4096;
0537     dev->mode_config.max_height = 4096;
0538
0539     psb_setup_outputs(dev);
0540
0541     if (dev_priv->ops->errata)
0542             dev_priv->ops->errata(dev);
0543
0544         dev_priv->modeset = true;
0545 }
0546
0547 void psb_modeset_cleanup(struct drm_device *dev)
0548 {
0549     struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
0550     if (dev_priv->modeset) {
0551         drm_kms_helper_poll_fini(dev);
0552         psb_fbdev_fini(dev);
0553     }
0554 }