2 * Copyright 2010 Matt Turner.
3 * Copyright 2012 Red Hat
5 * This file is subject to the terms and conditions of the GNU General
6 * Public License version 2. See the file COPYING in the main
7 * directory of this archive for more details.
9 * Authors: Matthew Garrett
13 #include <linux/module.h>
15 #include <drm/drm_fb_helper.h>
19 #include "mgag200_drv.h"
21 static void mga_dirty_update(struct mga_fbdev *mfbdev,
22 int x, int y, int width, int height)
25 struct drm_gem_object *obj;
26 struct mgag200_bo *bo;
27 int src_offset, dst_offset;
28 int bpp = (mfbdev->mfb.base.bits_per_pixel + 7)/8;
32 obj = mfbdev->mfb.obj;
33 bo = gem_to_mga_bo(obj);
35 ret = mgag200_bo_reserve(bo, true);
37 DRM_ERROR("failed to reserve fb bo\n");
41 if (!bo->kmap.virtual) {
42 ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
44 DRM_ERROR("failed to kmap fb updates\n");
45 mgag200_bo_unreserve(bo);
50 for (i = y; i < y + height; i++) {
51 /* assume equal stride for now */
52 src_offset = dst_offset = i * mfbdev->mfb.base.pitches[0] + (x * bpp);
53 memcpy_toio(bo->kmap.virtual + src_offset, mfbdev->sysram + src_offset, width * bpp);
57 ttm_bo_kunmap(&bo->kmap);
59 mgag200_bo_unreserve(bo);
62 static void mga_fillrect(struct fb_info *info,
63 const struct fb_fillrect *rect)
65 struct mga_fbdev *mfbdev = info->par;
66 sys_fillrect(info, rect);
67 mga_dirty_update(mfbdev, rect->dx, rect->dy, rect->width,
71 static void mga_copyarea(struct fb_info *info,
72 const struct fb_copyarea *area)
74 struct mga_fbdev *mfbdev = info->par;
75 sys_copyarea(info, area);
76 mga_dirty_update(mfbdev, area->dx, area->dy, area->width,
80 static void mga_imageblit(struct fb_info *info,
81 const struct fb_image *image)
83 struct mga_fbdev *mfbdev = info->par;
84 sys_imageblit(info, image);
85 mga_dirty_update(mfbdev, image->dx, image->dy, image->width,
90 static struct fb_ops mgag200fb_ops = {
92 .fb_check_var = drm_fb_helper_check_var,
93 .fb_set_par = drm_fb_helper_set_par,
94 .fb_fillrect = mga_fillrect,
95 .fb_copyarea = mga_copyarea,
96 .fb_imageblit = mga_imageblit,
97 .fb_pan_display = drm_fb_helper_pan_display,
98 .fb_blank = drm_fb_helper_blank,
99 .fb_setcmap = drm_fb_helper_setcmap,
102 static int mgag200fb_create_object(struct mga_fbdev *afbdev,
103 struct drm_mode_fb_cmd2 *mode_cmd,
104 struct drm_gem_object **gobj_p)
106 struct drm_device *dev = afbdev->helper.dev;
109 struct drm_gem_object *gobj;
112 drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
114 size = mode_cmd->pitches[0] * mode_cmd->height;
115 ret = mgag200_gem_create(dev, size, true, &gobj);
123 static int mgag200fb_create(struct mga_fbdev *mfbdev,
124 struct drm_fb_helper_surface_size *sizes)
126 struct drm_device *dev = mfbdev->helper.dev;
127 struct drm_mode_fb_cmd2 mode_cmd;
128 struct mga_device *mdev = dev->dev_private;
129 struct fb_info *info;
130 struct drm_framebuffer *fb;
131 struct drm_gem_object *gobj = NULL;
132 struct device *device = &dev->pdev->dev;
133 struct mgag200_bo *bo;
138 mode_cmd.width = sizes->surface_width;
139 mode_cmd.height = sizes->surface_height;
140 mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7) / 8);
142 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
143 sizes->surface_depth);
144 size = mode_cmd.pitches[0] * mode_cmd.height;
146 ret = mgag200fb_create_object(mfbdev, &mode_cmd, &gobj);
148 DRM_ERROR("failed to create fbcon backing object %d\n", ret);
151 bo = gem_to_mga_bo(gobj);
153 sysram = vmalloc(size);
157 info = framebuffer_alloc(0, device);
163 ret = mgag200_framebuffer_init(dev, &mfbdev->mfb, &mode_cmd, gobj);
167 mfbdev->sysram = sysram;
170 fb = &mfbdev->mfb.base;
173 mfbdev->helper.fb = fb;
174 mfbdev->helper.fbdev = info;
176 ret = fb_alloc_cmap(&info->cmap, 256, 0);
178 DRM_ERROR("%s: can't allocate color map\n", info->fix.id);
183 strcpy(info->fix.id, "mgadrmfb");
185 info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
186 info->fbops = &mgag200fb_ops;
188 /* setup aperture base/size for vesafb takeover */
189 info->apertures = alloc_apertures(1);
190 if (!info->apertures) {
194 info->apertures->ranges[0].base = mdev->dev->mode_config.fb_base;
195 info->apertures->ranges[0].size = mdev->mc.vram_size;
197 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
198 drm_fb_helper_fill_var(info, &mfbdev->helper, sizes->fb_width,
201 info->screen_base = sysram;
202 info->screen_size = size;
203 info->pixmap.flags = FB_PIXMAP_SYSTEM;
205 DRM_DEBUG_KMS("allocated %dx%d\n",
206 fb->width, fb->height);
212 static int mga_fb_find_or_create_single(struct drm_fb_helper *helper,
213 struct drm_fb_helper_surface_size
216 struct mga_fbdev *mfbdev = (struct mga_fbdev *)helper;
221 ret = mgag200fb_create(mfbdev, sizes);
229 static int mga_fbdev_destroy(struct drm_device *dev,
230 struct mga_fbdev *mfbdev)
232 struct fb_info *info;
233 struct mga_framebuffer *mfb = &mfbdev->mfb;
235 if (mfbdev->helper.fbdev) {
236 info = mfbdev->helper.fbdev;
238 unregister_framebuffer(info);
240 fb_dealloc_cmap(&info->cmap);
241 framebuffer_release(info);
245 drm_gem_object_unreference_unlocked(mfb->obj);
248 drm_fb_helper_fini(&mfbdev->helper);
249 vfree(mfbdev->sysram);
250 drm_framebuffer_cleanup(&mfb->base);
255 static struct drm_fb_helper_funcs mga_fb_helper_funcs = {
256 .gamma_set = mga_crtc_fb_gamma_set,
257 .gamma_get = mga_crtc_fb_gamma_get,
258 .fb_probe = mga_fb_find_or_create_single,
261 int mgag200_fbdev_init(struct mga_device *mdev)
263 struct mga_fbdev *mfbdev;
266 mfbdev = kzalloc(sizeof(struct mga_fbdev), GFP_KERNEL);
270 mdev->mfbdev = mfbdev;
271 mfbdev->helper.funcs = &mga_fb_helper_funcs;
273 ret = drm_fb_helper_init(mdev->dev, &mfbdev->helper,
274 mdev->num_crtc, MGAG200FB_CONN_LIMIT);
279 drm_fb_helper_single_add_all_connectors(&mfbdev->helper);
280 drm_fb_helper_initial_config(&mfbdev->helper, 32);
285 void mgag200_fbdev_fini(struct mga_device *mdev)
290 mga_fbdev_destroy(mdev->dev, mdev->mfbdev);