diff options
Diffstat (limited to 'drivers/gpu/drm/mgag200/mgag200_fb.c')
| -rw-r--r-- | drivers/gpu/drm/mgag200/mgag200_fb.c | 294 |
1 files changed, 294 insertions, 0 deletions
diff --git a/drivers/gpu/drm/mgag200/mgag200_fb.c b/drivers/gpu/drm/mgag200/mgag200_fb.c new file mode 100644 index 00000000000..880d3369760 --- /dev/null +++ b/drivers/gpu/drm/mgag200/mgag200_fb.c @@ -0,0 +1,294 @@ +/* + * Copyright 2010 Matt Turner. + * Copyright 2012 Red Hat + * + * This file is subject to the terms and conditions of the GNU General + * Public License version 2. See the file COPYING in the main + * directory of this archive for more details. + * + * Authors: Matthew Garrett + * Matt Turner + * Dave Airlie + */ +#include <linux/module.h> +#include "drmP.h" +#include "drm.h" +#include "drm_fb_helper.h" + +#include <linux/fb.h> + +#include "mgag200_drv.h" + +static void mga_dirty_update(struct mga_fbdev *mfbdev, + int x, int y, int width, int height) +{ + int i; + struct drm_gem_object *obj; + struct mgag200_bo *bo; + int src_offset, dst_offset; + int bpp = (mfbdev->mfb.base.bits_per_pixel + 7)/8; + int ret; + bool unmap = false; + + obj = mfbdev->mfb.obj; + bo = gem_to_mga_bo(obj); + + ret = mgag200_bo_reserve(bo, true); + if (ret) { + DRM_ERROR("failed to reserve fb bo\n"); + return; + } + + if (!bo->kmap.virtual) { + ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap); + if (ret) { + DRM_ERROR("failed to kmap fb updates\n"); + mgag200_bo_unreserve(bo); + return; + } + unmap = true; + } + for (i = y; i < y + height; i++) { + /* assume equal stride for now */ + src_offset = dst_offset = i * mfbdev->mfb.base.pitches[0] + (x * bpp); + memcpy_toio(bo->kmap.virtual + src_offset, mfbdev->sysram + src_offset, width * bpp); + + } + if (unmap) + ttm_bo_kunmap(&bo->kmap); + + mgag200_bo_unreserve(bo); +} + +static void mga_fillrect(struct fb_info *info, + const struct fb_fillrect *rect) +{ + struct mga_fbdev *mfbdev = info->par; + sys_fillrect(info, rect); + mga_dirty_update(mfbdev, rect->dx, rect->dy, rect->width, + rect->height); +} + +static void mga_copyarea(struct fb_info *info, + const struct fb_copyarea *area) +{ + struct mga_fbdev *mfbdev = info->par; + sys_copyarea(info, area); + mga_dirty_update(mfbdev, area->dx, area->dy, area->width, + area->height); +} + +static void mga_imageblit(struct fb_info *info, + const struct fb_image *image) +{ + struct mga_fbdev *mfbdev = info->par; + sys_imageblit(info, image); + mga_dirty_update(mfbdev, image->dx, image->dy, image->width, + image->height); +} + + +static struct fb_ops mgag200fb_ops = { + .owner = THIS_MODULE, + .fb_check_var = drm_fb_helper_check_var, + .fb_set_par = drm_fb_helper_set_par, + .fb_fillrect = mga_fillrect, + .fb_copyarea = mga_copyarea, + .fb_imageblit = mga_imageblit, + .fb_pan_display = drm_fb_helper_pan_display, + .fb_blank = drm_fb_helper_blank, + .fb_setcmap = drm_fb_helper_setcmap, +}; + +static int mgag200fb_create_object(struct mga_fbdev *afbdev, + struct drm_mode_fb_cmd2 *mode_cmd, + struct drm_gem_object **gobj_p) +{ + struct drm_device *dev = afbdev->helper.dev; + u32 bpp, depth; + u32 size; + struct drm_gem_object *gobj; + + int ret = 0; + drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp); + + size = mode_cmd->pitches[0] * mode_cmd->height; + ret = mgag200_gem_create(dev, size, true, &gobj); + if (ret) + return ret; + + *gobj_p = gobj; + return ret; +} + +static int mgag200fb_create(struct mga_fbdev *mfbdev, + struct drm_fb_helper_surface_size *sizes) +{ + struct drm_device *dev = mfbdev->helper.dev; + struct drm_mode_fb_cmd2 mode_cmd; + struct mga_device *mdev = dev->dev_private; + struct fb_info *info; + struct drm_framebuffer *fb; + struct drm_gem_object *gobj = NULL; + struct device *device = &dev->pdev->dev; + struct mgag200_bo *bo; + int ret; + void *sysram; + int size; + + mode_cmd.width = sizes->surface_width; + mode_cmd.height = sizes->surface_height; + mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7) / 8); + + mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, + sizes->surface_depth); + size = mode_cmd.pitches[0] * mode_cmd.height; + + ret = mgag200fb_create_object(mfbdev, &mode_cmd, &gobj); + if (ret) { + DRM_ERROR("failed to create fbcon backing object %d\n", ret); + return ret; + } + bo = gem_to_mga_bo(gobj); + + sysram = vmalloc(size); + if (!sysram) + return -ENOMEM; + + info = framebuffer_alloc(0, device); + if (info == NULL) + return -ENOMEM; + + info->par = mfbdev; + + ret = mgag200_framebuffer_init(dev, &mfbdev->mfb, &mode_cmd, gobj); + if (ret) + return ret; + + mfbdev->sysram = sysram; + mfbdev->size = size; + + fb = &mfbdev->mfb.base; + + /* setup helper */ + mfbdev->helper.fb = fb; + mfbdev->helper.fbdev = info; + + ret = fb_alloc_cmap(&info->cmap, 256, 0); + if (ret) { + DRM_ERROR("%s: can't allocate color map\n", info->fix.id); + ret = -ENOMEM; + goto out; + } + + strcpy(info->fix.id, "mgadrmfb"); + + info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT; + info->fbops = &mgag200fb_ops; + + /* setup aperture base/size for vesafb takeover */ + info->apertures = alloc_apertures(1); + if (!info->apertures) { + ret = -ENOMEM; + goto out; + } + info->apertures->ranges[0].base = mdev->dev->mode_config.fb_base; + info->apertures->ranges[0].size = mdev->mc.vram_size; + + drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth); + drm_fb_helper_fill_var(info, &mfbdev->helper, sizes->fb_width, + sizes->fb_height); + + info->screen_base = sysram; + info->screen_size = size; + info->pixmap.flags = FB_PIXMAP_SYSTEM; + + DRM_DEBUG_KMS("allocated %dx%d\n", + fb->width, fb->height); + return 0; +out: + return ret; +} + +static int mga_fb_find_or_create_single(struct drm_fb_helper *helper, + struct drm_fb_helper_surface_size + *sizes) +{ + struct mga_fbdev *mfbdev = (struct mga_fbdev *)helper; + int new_fb = 0; + int ret; + + if (!helper->fb) { + ret = mgag200fb_create(mfbdev, sizes); + if (ret) + return ret; + new_fb = 1; + } + return new_fb; +} + +static int mga_fbdev_destroy(struct drm_device *dev, + struct mga_fbdev *mfbdev) +{ + struct fb_info *info; + struct mga_framebuffer *mfb = &mfbdev->mfb; + + if (mfbdev->helper.fbdev) { + info = mfbdev->helper.fbdev; + + unregister_framebuffer(info); + if (info->cmap.len) + fb_dealloc_cmap(&info->cmap); + framebuffer_release(info); + } + + if (mfb->obj) { + drm_gem_object_unreference_unlocked(mfb->obj); + mfb->obj = NULL; + } + drm_fb_helper_fini(&mfbdev->helper); + vfree(mfbdev->sysram); + drm_framebuffer_cleanup(&mfb->base); + + return 0; +} + +static struct drm_fb_helper_funcs mga_fb_helper_funcs = { + .gamma_set = mga_crtc_fb_gamma_set, + .gamma_get = mga_crtc_fb_gamma_get, + .fb_probe = mga_fb_find_or_create_single, +}; + +int mgag200_fbdev_init(struct mga_device *mdev) +{ + struct mga_fbdev *mfbdev; + int ret; + + mfbdev = kzalloc(sizeof(struct mga_fbdev), GFP_KERNEL); + if (!mfbdev) + return -ENOMEM; + + mdev->mfbdev = mfbdev; + mfbdev->helper.funcs = &mga_fb_helper_funcs; + + ret = drm_fb_helper_init(mdev->dev, &mfbdev->helper, + mdev->num_crtc, MGAG200FB_CONN_LIMIT); + if (ret) { + kfree(mfbdev); + return ret; + } + drm_fb_helper_single_add_all_connectors(&mfbdev->helper); + drm_fb_helper_initial_config(&mfbdev->helper, 32); + + return 0; +} + +void mgag200_fbdev_fini(struct mga_device *mdev) +{ + if (!mdev->mfbdev) + return; + + mga_fbdev_destroy(mdev->dev, mdev->mfbdev); + kfree(mdev->mfbdev); + mdev->mfbdev = NULL; +} |