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>
16 #include <drm/drm_crtc_helper.h>
20 #include "mgag200_drv.h"
22 static void mga_dirty_update(struct mga_fbdev *mfbdev,
23 int x, int y, int width, int height)
26 struct drm_gem_object *obj;
27 struct mgag200_bo *bo;
28 int src_offset, dst_offset;
29 int bpp = (mfbdev->mfb.base.bits_per_pixel + 7)/8;
32 bool store_for_later = false;
36 obj = mfbdev->mfb.obj;
37 bo = gem_to_mga_bo(obj);
40 * try and reserve the BO, if we fail with busy
41 * then the BO is being moved and we should
42 * store up the damage until later.
45 ret = mgag200_bo_reserve(bo, true);
50 store_for_later = true;
55 spin_lock_irqsave(&mfbdev->dirty_lock, flags);
66 if (store_for_later) {
71 spin_unlock_irqrestore(&mfbdev->dirty_lock, flags);
75 mfbdev->x1 = mfbdev->y1 = INT_MAX;
76 mfbdev->x2 = mfbdev->y2 = 0;
77 spin_unlock_irqrestore(&mfbdev->dirty_lock, flags);
79 if (!bo->kmap.virtual) {
80 ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
82 DRM_ERROR("failed to kmap fb updates\n");
83 mgag200_bo_unreserve(bo);
88 for (i = y; i <= y2; i++) {
89 /* assume equal stride for now */
90 src_offset = dst_offset = i * mfbdev->mfb.base.pitches[0] + (x * bpp);
91 memcpy_toio(bo->kmap.virtual + src_offset, mfbdev->sysram + src_offset, (x2 - x + 1) * bpp);
95 ttm_bo_kunmap(&bo->kmap);
97 mgag200_bo_unreserve(bo);
100 static void mga_fillrect(struct fb_info *info,
101 const struct fb_fillrect *rect)
103 struct mga_fbdev *mfbdev = info->par;
104 sys_fillrect(info, rect);
105 mga_dirty_update(mfbdev, rect->dx, rect->dy, rect->width,
109 static void mga_copyarea(struct fb_info *info,
110 const struct fb_copyarea *area)
112 struct mga_fbdev *mfbdev = info->par;
113 sys_copyarea(info, area);
114 mga_dirty_update(mfbdev, area->dx, area->dy, area->width,
118 static void mga_imageblit(struct fb_info *info,
119 const struct fb_image *image)
121 struct mga_fbdev *mfbdev = info->par;
122 sys_imageblit(info, image);
123 mga_dirty_update(mfbdev, image->dx, image->dy, image->width,
128 static struct fb_ops mgag200fb_ops = {
129 .owner = THIS_MODULE,
130 .fb_check_var = drm_fb_helper_check_var,
131 .fb_set_par = drm_fb_helper_set_par,
132 .fb_fillrect = mga_fillrect,
133 .fb_copyarea = mga_copyarea,
134 .fb_imageblit = mga_imageblit,
135 .fb_pan_display = drm_fb_helper_pan_display,
136 .fb_blank = drm_fb_helper_blank,
137 .fb_setcmap = drm_fb_helper_setcmap,
140 static int mgag200fb_create_object(struct mga_fbdev *afbdev,
141 struct drm_mode_fb_cmd2 *mode_cmd,
142 struct drm_gem_object **gobj_p)
144 struct drm_device *dev = afbdev->helper.dev;
146 struct drm_gem_object *gobj;
149 size = mode_cmd->pitches[0] * mode_cmd->height;
150 ret = mgag200_gem_create(dev, size, true, &gobj);
158 static int mgag200fb_create(struct drm_fb_helper *helper,
159 struct drm_fb_helper_surface_size *sizes)
161 struct mga_fbdev *mfbdev = (struct mga_fbdev *)helper;
162 struct drm_device *dev = mfbdev->helper.dev;
163 struct drm_mode_fb_cmd2 mode_cmd;
164 struct mga_device *mdev = dev->dev_private;
165 struct fb_info *info;
166 struct drm_framebuffer *fb;
167 struct drm_gem_object *gobj = NULL;
168 struct device *device = &dev->pdev->dev;
169 struct mgag200_bo *bo;
174 mode_cmd.width = sizes->surface_width;
175 mode_cmd.height = sizes->surface_height;
176 mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7) / 8);
178 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
179 sizes->surface_depth);
180 size = mode_cmd.pitches[0] * mode_cmd.height;
182 ret = mgag200fb_create_object(mfbdev, &mode_cmd, &gobj);
184 DRM_ERROR("failed to create fbcon backing object %d\n", ret);
187 bo = gem_to_mga_bo(gobj);
189 sysram = vmalloc(size);
193 info = framebuffer_alloc(0, device);
199 ret = mgag200_framebuffer_init(dev, &mfbdev->mfb, &mode_cmd, gobj);
203 mfbdev->sysram = sysram;
206 fb = &mfbdev->mfb.base;
209 mfbdev->helper.fb = fb;
210 mfbdev->helper.fbdev = info;
212 ret = fb_alloc_cmap(&info->cmap, 256, 0);
214 DRM_ERROR("%s: can't allocate color map\n", info->fix.id);
219 strcpy(info->fix.id, "mgadrmfb");
221 info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
222 info->fbops = &mgag200fb_ops;
224 /* setup aperture base/size for vesafb takeover */
225 info->apertures = alloc_apertures(1);
226 if (!info->apertures) {
230 info->apertures->ranges[0].base = mdev->dev->mode_config.fb_base;
231 info->apertures->ranges[0].size = mdev->mc.vram_size;
233 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
234 drm_fb_helper_fill_var(info, &mfbdev->helper, sizes->fb_width,
237 info->screen_base = sysram;
238 info->screen_size = size;
239 info->pixmap.flags = FB_PIXMAP_SYSTEM;
241 DRM_DEBUG_KMS("allocated %dx%d\n",
242 fb->width, fb->height);
248 static int mga_fbdev_destroy(struct drm_device *dev,
249 struct mga_fbdev *mfbdev)
251 struct fb_info *info;
252 struct mga_framebuffer *mfb = &mfbdev->mfb;
254 if (mfbdev->helper.fbdev) {
255 info = mfbdev->helper.fbdev;
257 unregister_framebuffer(info);
259 fb_dealloc_cmap(&info->cmap);
260 framebuffer_release(info);
264 drm_gem_object_unreference_unlocked(mfb->obj);
267 drm_fb_helper_fini(&mfbdev->helper);
268 vfree(mfbdev->sysram);
269 drm_framebuffer_unregister_private(&mfb->base);
270 drm_framebuffer_cleanup(&mfb->base);
275 static struct drm_fb_helper_funcs mga_fb_helper_funcs = {
276 .gamma_set = mga_crtc_fb_gamma_set,
277 .gamma_get = mga_crtc_fb_gamma_get,
278 .fb_probe = mgag200fb_create,
281 int mgag200_fbdev_init(struct mga_device *mdev)
283 struct mga_fbdev *mfbdev;
286 mfbdev = devm_kzalloc(mdev->dev->dev, sizeof(struct mga_fbdev), GFP_KERNEL);
290 mdev->mfbdev = mfbdev;
291 mfbdev->helper.funcs = &mga_fb_helper_funcs;
292 spin_lock_init(&mfbdev->dirty_lock);
294 ret = drm_fb_helper_init(mdev->dev, &mfbdev->helper,
295 mdev->num_crtc, MGAG200FB_CONN_LIMIT);
299 drm_fb_helper_single_add_all_connectors(&mfbdev->helper);
301 /* disable all the possible outputs/crtcs before entering KMS mode */
302 drm_helper_disable_unused_functions(mdev->dev);
304 drm_fb_helper_initial_config(&mfbdev->helper, 32);
309 void mgag200_fbdev_fini(struct mga_device *mdev)
314 mga_fbdev_destroy(mdev->dev, mdev->mfbdev);