// SPDX-License-Identifier: GPL-2.0-only /************************************************************************** * Copyright (c) 2007-2011, Intel Corporation. * All Rights Reserved. * **************************************************************************/ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "framebuffer.h" #include "gtt.h" #include "psb_drv.h" #include "psb_intel_drv.h" #include "psb_intel_reg.h" static const struct drm_framebuffer_funcs psb_fb_funcs = { .destroy = drm_gem_fb_destroy, .create_handle = drm_gem_fb_create_handle, }; #define CMAP_TOHW(_val, _width) ((((_val) << (_width)) + 0x7FFF - (_val)) >> 16) static int psbfb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *info) { struct drm_fb_helper *fb_helper = info->par; struct drm_framebuffer *fb = fb_helper->fb; uint32_t v; if (!fb) return -ENOMEM; if (regno > 255) return 1; red = CMAP_TOHW(red, info->var.red.length); blue = CMAP_TOHW(blue, info->var.blue.length); green = CMAP_TOHW(green, info->var.green.length); transp = CMAP_TOHW(transp, info->var.transp.length); v = (red << info->var.red.offset) | (green << info->var.green.offset) | (blue << info->var.blue.offset) | (transp << info->var.transp.offset); if (regno < 16) { switch (fb->format->cpp[0] * 8) { case 16: ((uint32_t *) info->pseudo_palette)[regno] = v; break; case 24: case 32: ((uint32_t *) info->pseudo_palette)[regno] = v; break; } } return 0; } static int psbfb_pan(struct fb_var_screeninfo *var, struct fb_info *info) { struct drm_fb_helper *fb_helper = info->par; struct drm_framebuffer *fb = fb_helper->fb; struct drm_device *dev = fb->dev; struct gtt_range *gtt = to_gtt_range(fb->obj[0]); /* * We have to poke our nose in here. The core fb code assumes * panning is part of the hardware that can be invoked before * the actual fb is mapped. In our case that isn't quite true. */ if (gtt->npage) { /* GTT roll shifts in 4K pages, we need to shift the right number of pages */ int pages = info->fix.line_length >> 12; psb_gtt_roll(dev, gtt, var->yoffset * pages); } return 0; } static vm_fault_t psbfb_vm_fault(struct vm_fault *vmf) { struct vm_area_struct *vma = vmf->vma; struct drm_framebuffer *fb = vma->vm_private_data; struct drm_device *dev = fb->dev; struct drm_psb_private *dev_priv = dev->dev_private; struct gtt_range *gtt = to_gtt_range(fb->obj[0]); int page_num; int i; unsigned long address; vm_fault_t ret = VM_FAULT_SIGBUS; unsigned long pfn; unsigned long phys_addr = (unsigned long)dev_priv->stolen_base + gtt->offset; page_num = vma_pages(vma); address = vmf->address - (vmf->pgoff << PAGE_SHIFT); vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); for (i = 0; i < page_num; i++) { pfn = (phys_addr >> PAGE_SHIFT); ret = vmf_insert_mixed(vma, address, __pfn_to_pfn_t(pfn, PFN_DEV)); if (unlikely(ret & VM_FAULT_ERROR)) break; address += PAGE_SIZE; phys_addr += PAGE_SIZE; } return ret; } static void psbfb_vm_open(struct vm_area_struct *vma) { } static void psbfb_vm_close(struct vm_area_struct *vma) { } static const struct vm_operations_struct psbfb_vm_ops = { .fault = psbfb_vm_fault, .open = psbfb_vm_open, .close = psbfb_vm_close }; static int psbfb_mmap(struct fb_info *info, struct vm_area_struct *vma) { struct drm_fb_helper *fb_helper = info->par; struct drm_framebuffer *fb = fb_helper->fb; if (vma->vm_pgoff != 0) return -EINVAL; if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) return -EINVAL; /* * If this is a GEM object then info->screen_base is the virtual * kernel remapping of the object. FIXME: Review if this is * suitable for our mmap work */ vma->vm_ops = &psbfb_vm_ops; vma->vm_private_data = (void *)fb; vma->vm_flags |= VM_IO | VM_MIXEDMAP | VM_DONTEXPAND | VM_DONTDUMP; return 0; } static struct fb_ops psbfb_ops = { .owner = THIS_MODULE, DRM_FB_HELPER_DEFAULT_OPS, .fb_setcolreg = psbfb_setcolreg, .fb_fillrect = drm_fb_helper_cfb_fillrect, .fb_copyarea = psbfb_copyarea, .fb_imageblit = drm_fb_helper_cfb_imageblit, .fb_mmap = psbfb_mmap, .fb_sync = psbfb_sync, }; static struct fb_ops psbfb_roll_ops = { .owner = THIS_MODULE, DRM_FB_HELPER_DEFAULT_OPS, .fb_setcolreg = psbfb_setcolreg, .fb_fillrect = drm_fb_helper_cfb_fillrect, .fb_copyarea = drm_fb_helper_cfb_copyarea, .fb_imageblit = drm_fb_helper_cfb_imageblit, .fb_pan_display = psbfb_pan, .fb_mmap = psbfb_mmap, }; static struct fb_ops psbfb_unaccel_ops = { .owner = THIS_MODULE, DRM_FB_HELPER_DEFAULT_OPS, .fb_setcolreg = psbfb_setcolreg, .fb_fillrect = drm_fb_helper_cfb_fillrect, .fb_copyarea = drm_fb_helper_cfb_copyarea, .fb_imageblit = drm_fb_helper_cfb_imageblit, .fb_mmap = psbfb_mmap, }; /** * psb_framebuffer_init - initialize a framebuffer * @dev: our DRM device * @fb: framebuffer to set up * @mode_cmd: mode description * @gt: backing object * * Configure and fill in the boilerplate for our frame buffer. Return * 0 on success or an error code if we fail. */ static int psb_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb, const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object *obj) { const struct drm_format_info *info; int ret; /* * Reject unknown formats, YUV formats, and formats with more than * 4 bytes per pixel. */ info = drm_get_format_info(dev, mode_cmd); if (!info || !info->depth || info->cpp[0] > 4) return -EINVAL; if (mode_cmd->pitches[0] & 63) return -EINVAL; drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd); fb->obj[0] = obj; ret = drm_framebuffer_init(dev, fb, &psb_fb_funcs); if (ret) { dev_err(dev->dev, "framebuffer init failed: %d\n", ret); return ret; } return 0; } /** * psb_framebuffer_create - create a framebuffer backed by gt * @dev: our DRM device * @mode_cmd: the description of the requested mode * @gt: the backing object * * Create a framebuffer object backed by the gt, and fill in the * boilerplate required * * TODO: review object references */ static struct drm_framebuffer *psb_framebuffer_create (struct drm_device *dev, const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object *obj) { struct drm_framebuffer *fb; int ret; fb = kzalloc(sizeof(*fb), GFP_KERNEL); if (!fb) return ERR_PTR(-ENOMEM); ret = psb_framebuffer_init(dev, fb, mode_cmd, obj); if (ret) { kfree(fb); return ERR_PTR(ret); } return fb; } /** * psbfb_alloc - allocate frame buffer memory * @dev: the DRM device * @aligned_size: space needed * * Allocate the frame buffer. In the usual case we get a GTT range that * is stolen memory backed and life is simple. If there isn't sufficient * we fail as we don't have the virtual mapping space to really vmap it * and the kernel console code can't handle non linear framebuffers. * * Re-address this as and if the framebuffer layer grows this ability. */ static struct gtt_range *psbfb_alloc(struct drm_device *dev, int aligned_size) { struct gtt_range *backing; /* Begin by trying to use stolen memory backing */ backing = psb_gtt_alloc_range(dev, aligned_size, "fb", 1, PAGE_SIZE); if (backing) { drm_gem_private_object_init(dev, &backing->gem, aligned_size); return backing; } return NULL; } /** * psbfb_create - create a framebuffer * @fbdev: the framebuffer device * @sizes: specification of the layout * * Create a framebuffer to the specifications provided */ static int psbfb_create(struct drm_fb_helper *fb_helper, struct drm_fb_helper_surface_size *sizes) { struct drm_device *dev = fb_helper->dev; struct drm_psb_private *dev_priv = dev->dev_private; struct fb_info *info; struct drm_framebuffer *fb; struct drm_mode_fb_cmd2 mode_cmd; int size; int ret; struct gtt_range *backing; u32 bpp, depth; int gtt_roll = 0; int pitch_lines = 0; mode_cmd.width = sizes->surface_width; mode_cmd.height = sizes->surface_height; bpp = sizes->surface_bpp; depth = sizes->surface_depth; /* No 24bit packed */ if (bpp == 24) bpp = 32; do { /* * Acceleration via the GTT requires pitch to be * power of two aligned. Preferably page but less * is ok with some fonts */ mode_cmd.pitches[0] = ALIGN(mode_cmd.width * ((bpp + 7) / 8), 4096 >> pitch_lines); size = mode_cmd.pitches[0] * mode_cmd.height; size = ALIGN(size, PAGE_SIZE); /* Allocate the fb in the GTT with stolen page backing */ backing = psbfb_alloc(dev, size); if (pitch_lines) pitch_lines *= 2; else pitch_lines = 1; gtt_roll++; } while (backing == NULL && pitch_lines <= 16); /* The final pitch we accepted if we succeeded */ pitch_lines /= 2; if (backing == NULL) { /* * We couldn't get the space we wanted, fall back to the * display engine requirement instead. The HW requires * the pitch to be 64 byte aligned */ gtt_roll = 0; /* Don't use GTT accelerated scrolling */ pitch_lines = 64; mode_cmd.pitches[0] = ALIGN(mode_cmd.width * ((bpp + 7) / 8), 64); size = mode_cmd.pitches[0] * mode_cmd.height; size = ALIGN(size, PAGE_SIZE); /* Allocate the framebuffer in the GTT with stolen page backing */ backing = psbfb_alloc(dev, size); if (backing == NULL) return -ENOMEM; } memset(dev_priv->vram_addr + backing->offset, 0, size); info = drm_fb_helper_alloc_fbi(fb_helper); if (IS_ERR(info)) { ret = PTR_ERR(info); goto out; } mode_cmd.pixel_format = drm_mode_legacy_fb_format(bpp, depth); fb = psb_framebuffer_create(dev, &mode_cmd, &backing->gem); if (IS_ERR(fb)) { ret = PTR_ERR(fb); goto out; } fb_helper->fb = fb; if (dev_priv->ops->accel_2d && pitch_lines > 8) /* 2D engine */ info->fbops = &psbfb_ops; else if (gtt_roll) { /* GTT rolling seems best */ info->fbops = &psbfb_roll_ops; info->flags |= FBINFO_HWACCEL_YPAN; } else /* Software */ info->fbops = &psbfb_unaccel_ops; info->fix.smem_start = dev->mode_config.fb_base; info->fix.smem_len = size; info->fix.ywrapstep = gtt_roll; info->fix.ypanstep = 0; /* Accessed stolen memory directly */ info->screen_base = dev_priv->vram_addr + backing->offset; info->screen_size = size; if (dev_priv->gtt.stolen_size) { info->apertures->ranges[0].base = dev->mode_config.fb_base; info->apertures->ranges[0].size = dev_priv->gtt.stolen_size; } drm_fb_helper_fill_info(info, fb_helper, sizes); info->fix.mmio_start = pci_resource_start(dev->pdev, 0); info->fix.mmio_len = pci_resource_len(dev->pdev, 0); /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */ dev_dbg(dev->dev, "allocated %dx%d fb\n", fb->width, fb->height); return 0; out: psb_gtt_free_range(dev, backing); return ret; } /** * psb_user_framebuffer_create - create framebuffer * @dev: our DRM device * @filp: client file * @cmd: mode request * * Create a new framebuffer backed by a userspace GEM object */ static struct drm_framebuffer *psb_user_framebuffer_create (struct drm_device *dev, struct drm_file *filp, const struct drm_mode_fb_cmd2 *cmd) { struct drm_gem_object *obj; /* * Find the GEM object and thus the gtt range object that is * to back this space */ obj = drm_gem_object_lookup(filp, cmd->handles[0]); if (obj == NULL) return ERR_PTR(-ENOENT); /* Let the core code do all the work */ return psb_framebuffer_create(dev, cmd, obj); } static int psbfb_probe(struct drm_fb_helper *fb_helper, struct drm_fb_helper_surface_size *sizes) { struct drm_device *dev = fb_helper->dev; struct drm_psb_private *dev_priv = dev->dev_private; unsigned int fb_size; int bytespp; bytespp = sizes->surface_bpp / 8; if (bytespp == 3) /* no 24bit packed */ bytespp = 4; /* If the mode will not fit in 32bit then switch to 16bit to get a console on full resolution. The X mode setting server will allocate its own 32bit GEM framebuffer */ fb_size = ALIGN(sizes->surface_width * bytespp, 64) * sizes->surface_height; fb_size = ALIGN(fb_size, PAGE_SIZE); if (fb_size > dev_priv->vram_stolen_size) { sizes->surface_bpp = 16; sizes->surface_depth = 16; } return psbfb_create(fb_helper, sizes); } static const struct drm_fb_helper_funcs psb_fb_helper_funcs = { .fb_probe = psbfb_probe, }; static int psb_fbdev_destroy(struct drm_device *dev, struct drm_fb_helper *fb_helper) { struct drm_framebuffer *fb = fb_helper->fb; drm_fb_helper_unregister_fbi(fb_helper); drm_fb_helper_fini(fb_helper); drm_framebuffer_unregister_private(fb); drm_framebuffer_cleanup(fb); if (fb->obj[0]) drm_gem_object_put_unlocked(fb->obj[0]); kfree(fb); return 0; } int psb_fbdev_init(struct drm_device *dev) { struct drm_fb_helper *fb_helper; struct drm_psb_private *dev_priv = dev->dev_private; int ret; fb_helper = kzalloc(sizeof(*fb_helper), GFP_KERNEL); if (!fb_helper) { dev_err(dev->dev, "no memory\n"); return -ENOMEM; } dev_priv->fb_helper = fb_helper; drm_fb_helper_prepare(dev, fb_helper, &psb_fb_helper_funcs); ret = drm_fb_helper_init(dev, fb_helper); if (ret) goto free; ret = drm_fb_helper_single_add_all_connectors(fb_helper); if (ret) goto fini; /* disable all the possible outputs/crtcs before entering KMS mode */ drm_helper_disable_unused_functions(dev); ret = drm_fb_helper_initial_config(fb_helper, 32); if (ret) goto fini; return 0; fini: drm_fb_helper_fini(fb_helper); free: kfree(fb_helper); return ret; } static void psb_fbdev_fini(struct drm_device *dev) { struct drm_psb_private *dev_priv = dev->dev_private; if (!dev_priv->fb_helper) return; psb_fbdev_destroy(dev, dev_priv->fb_helper); kfree(dev_priv->fb_helper); dev_priv->fb_helper = NULL; } static const struct drm_mode_config_funcs psb_mode_funcs = { .fb_create = psb_user_framebuffer_create, .output_poll_changed = drm_fb_helper_output_poll_changed, }; static void psb_setup_outputs(struct drm_device *dev) { struct drm_psb_private *dev_priv = dev->dev_private; struct drm_connector *connector; drm_mode_create_scaling_mode_property(dev); /* It is ok for this to fail - we just don't get backlight control */ if (!dev_priv->backlight_property) dev_priv->backlight_property = drm_property_create_range(dev, 0, "backlight", 0, 100); dev_priv->ops->output_init(dev); list_for_each_entry(connector, &dev->mode_config.connector_list, head) { struct gma_encoder *gma_encoder = gma_attached_encoder(connector); struct drm_encoder *encoder = &gma_encoder->base; int crtc_mask = 0, clone_mask = 0; /* valid crtcs */ switch (gma_encoder->type) { case INTEL_OUTPUT_ANALOG: crtc_mask = (1 << 0); clone_mask = (1 << INTEL_OUTPUT_ANALOG); break; case INTEL_OUTPUT_SDVO: crtc_mask = dev_priv->ops->sdvo_mask; clone_mask = (1 << INTEL_OUTPUT_SDVO); break; case INTEL_OUTPUT_LVDS: crtc_mask = dev_priv->ops->lvds_mask; clone_mask = (1 << INTEL_OUTPUT_LVDS); break; case INTEL_OUTPUT_MIPI: crtc_mask = (1 << 0); clone_mask = (1 << INTEL_OUTPUT_MIPI); break; case INTEL_OUTPUT_MIPI2: crtc_mask = (1 << 2); clone_mask = (1 << INTEL_OUTPUT_MIPI2); break; case INTEL_OUTPUT_HDMI: crtc_mask = dev_priv->ops->hdmi_mask; clone_mask = (1 << INTEL_OUTPUT_HDMI); break; case INTEL_OUTPUT_DISPLAYPORT: crtc_mask = (1 << 0) | (1 << 1); clone_mask = (1 << INTEL_OUTPUT_DISPLAYPORT); break; case INTEL_OUTPUT_EDP: crtc_mask = (1 << 1); clone_mask = (1 << INTEL_OUTPUT_EDP); } encoder->possible_crtcs = crtc_mask; encoder->possible_clones = gma_connector_clones(dev, clone_mask); } } void psb_modeset_init(struct drm_device *dev) { struct drm_psb_private *dev_priv = dev->dev_private; struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; int i; drm_mode_config_init(dev); dev->mode_config.min_width = 0; dev->mode_config.min_height = 0; dev->mode_config.funcs = &psb_mode_funcs; /* set memory base */ /* Oaktrail and Poulsbo should use BAR 2*/ pci_read_config_dword(dev->pdev, PSB_BSM, (u32 *) &(dev->mode_config.fb_base)); /* num pipes is 2 for PSB but 1 for Mrst */ for (i = 0; i < dev_priv->num_pipe; i++) psb_intel_crtc_init(dev, i, mode_dev); dev->mode_config.max_width = 4096; dev->mode_config.max_height = 4096; psb_setup_outputs(dev); if (dev_priv->ops->errata) dev_priv->ops->errata(dev); dev_priv->modeset = true; } void psb_modeset_cleanup(struct drm_device *dev) { struct drm_psb_private *dev_priv = dev->dev_private; if (dev_priv->modeset) { drm_kms_helper_poll_fini(dev); psb_fbdev_fini(dev); drm_mode_config_cleanup(dev); } }