diff options
Diffstat (limited to 'drivers/gpu/drm/gma500/framebuffer.c')
| -rw-r--r-- | drivers/gpu/drm/gma500/framebuffer.c | 554 |
1 files changed, 554 insertions, 0 deletions
diff --git a/drivers/gpu/drm/gma500/framebuffer.c b/drivers/gpu/drm/gma500/framebuffer.c new file mode 100644 index 000000000..aa3ecf771 --- /dev/null +++ b/drivers/gpu/drm/gma500/framebuffer.c @@ -0,0 +1,554 @@ +// SPDX-License-Identifier: GPL-2.0-only +/************************************************************************** + * Copyright (c) 2007-2011, Intel Corporation. + * All Rights Reserved. + * + **************************************************************************/ + +#include <linux/console.h> +#include <linux/delay.h> +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/module.h> +#include <linux/pfn_t.h> +#include <linux/slab.h> +#include <linux/string.h> +#include <linux/tty.h> + +#include <drm/drm.h> +#include <drm/drm_crtc.h> +#include <drm/drm_fb_helper.h> +#include <drm/drm_fourcc.h> +#include <drm/drm_framebuffer.h> +#include <drm/drm_gem_framebuffer_helper.h> + +#include "framebuffer.h" +#include "gem.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 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 = to_drm_psb_private(dev); + struct psb_gem_object *pobj = to_psb_gem_object(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 + pobj->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 const 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 + * @obj: 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 + * @obj: 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_create - create a framebuffer + * @fb_helper: the framebuffer helper + * @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 = to_drm_psb_private(dev); + struct pci_dev *pdev = to_pci_dev(dev->dev); + struct fb_info *info; + struct drm_framebuffer *fb; + struct drm_mode_fb_cmd2 mode_cmd; + int size; + int ret; + struct psb_gem_object *backing; + struct drm_gem_object *obj; + u32 bpp, depth; + + 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; + + mode_cmd.pitches[0] = ALIGN(mode_cmd.width * DIV_ROUND_UP(bpp, 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 = psb_gem_create(dev, size, "fb", true, PAGE_SIZE); + if (IS_ERR(backing)) + return PTR_ERR(backing); + obj = &backing->base; + + 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 err_drm_gem_object_put; + } + + mode_cmd.pixel_format = drm_mode_legacy_fb_format(bpp, depth); + + fb = psb_framebuffer_create(dev, &mode_cmd, obj); + if (IS_ERR(fb)) { + ret = PTR_ERR(fb); + goto err_drm_gem_object_put; + } + + fb_helper->fb = fb; + + info->fbops = &psbfb_unaccel_ops; + + info->fix.smem_start = dev->mode_config.fb_base; + info->fix.smem_len = size; + info->fix.ywrapstep = 0; + 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(pdev, 0); + info->fix.mmio_len = pci_resource_len(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; + +err_drm_gem_object_put: + drm_gem_object_put(obj); + 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; + struct drm_framebuffer *fb; + + /* + * 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 */ + fb = psb_framebuffer_create(dev, cmd, obj); + if (IS_ERR(fb)) + drm_gem_object_put(obj); + + return fb; +} + +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 = to_drm_psb_private(dev); + 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(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 = to_drm_psb_private(dev); + 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; + + /* 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 = to_drm_psb_private(dev); + + 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 = to_drm_psb_private(dev); + struct drm_connector_list_iter conn_iter; + 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); + + drm_connector_list_iter_begin(dev, &conn_iter); + drm_for_each_connector_iter(connector, &conn_iter) { + 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 = 0; + break; + case INTEL_OUTPUT_LVDS: + crtc_mask = dev_priv->ops->lvds_mask; + clone_mask = 0; + break; + case INTEL_OUTPUT_MIPI: + crtc_mask = (1 << 0); + clone_mask = 0; + break; + case INTEL_OUTPUT_MIPI2: + crtc_mask = (1 << 2); + clone_mask = 0; + 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 = 0; + break; + case INTEL_OUTPUT_EDP: + crtc_mask = (1 << 1); + clone_mask = 0; + } + encoder->possible_crtcs = crtc_mask; + encoder->possible_clones = + gma_connector_clones(dev, clone_mask); + } + drm_connector_list_iter_end(&conn_iter); +} + +void psb_modeset_init(struct drm_device *dev) +{ + struct drm_psb_private *dev_priv = to_drm_psb_private(dev); + struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; + struct pci_dev *pdev = to_pci_dev(dev->dev); + int i; + + if (drmm_mode_config_init(dev)) + return; + + 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(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 = to_drm_psb_private(dev); + if (dev_priv->modeset) { + drm_kms_helper_poll_fini(dev); + psb_fbdev_fini(dev); + } +} |