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;
33 obj = mfbdev->mfb.obj;
34 bo = gem_to_mga_bo(obj);
36 ret = mgag200_bo_reserve(bo, true);
38 DRM_ERROR("failed to reserve fb bo\n");
42 if (!bo->kmap.virtual) {
43 ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
45 DRM_ERROR("failed to kmap fb updates\n");
46 mgag200_bo_unreserve(bo);
51 for (i = y; i < y + height; i++) {
52 /* assume equal stride for now */
53 src_offset = dst_offset = i * mfbdev->mfb.base.pitches[0] + (x * bpp);
54 memcpy_toio(bo->kmap.virtual + src_offset, mfbdev->sysram + src_offset, width * bpp);
58 ttm_bo_kunmap(&bo->kmap);
60 mgag200_bo_unreserve(bo);
63 static void mga_fillrect(struct fb_info *info,
64 const struct fb_fillrect *rect)
66 struct mga_fbdev *mfbdev = info->par;
67 sys_fillrect(info, rect);
68 mga_dirty_update(mfbdev, rect->dx, rect->dy, rect->width,
72 static void mga_copyarea(struct fb_info *info,
73 const struct fb_copyarea *area)
75 struct mga_fbdev *mfbdev = info->par;
76 sys_copyarea(info, area);
77 mga_dirty_update(mfbdev, area->dx, area->dy, area->width,
81 static void mga_imageblit(struct fb_info *info,
82 const struct fb_image *image)
84 struct mga_fbdev *mfbdev = info->par;
85 sys_imageblit(info, image);
86 mga_dirty_update(mfbdev, image->dx, image->dy, image->width,
91 static struct fb_ops mgag200fb_ops = {
93 .fb_check_var = drm_fb_helper_check_var,
94 .fb_set_par = drm_fb_helper_set_par,
95 .fb_fillrect = mga_fillrect,
96 .fb_copyarea = mga_copyarea,
97 .fb_imageblit = mga_imageblit,
98 .fb_pan_display = drm_fb_helper_pan_display,
99 .fb_blank = drm_fb_helper_blank,
100 .fb_setcmap = drm_fb_helper_setcmap,
103 static int mgag200fb_create_object(struct mga_fbdev *afbdev,
104 struct drm_mode_fb_cmd2 *mode_cmd,
105 struct drm_gem_object **gobj_p)
107 struct drm_device *dev = afbdev->helper.dev;
110 struct drm_gem_object *gobj;
113 drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
115 size = mode_cmd->pitches[0] * mode_cmd->height;
116 ret = mgag200_gem_create(dev, size, true, &gobj);
124 static int mgag200fb_create(struct drm_fb_helper *helper,
125 struct drm_fb_helper_surface_size *sizes)
127 struct mga_fbdev *mfbdev = (struct mga_fbdev *)helper;
128 struct drm_device *dev = mfbdev->helper.dev;
129 struct drm_mode_fb_cmd2 mode_cmd;
130 struct mga_device *mdev = dev->dev_private;
131 struct fb_info *info;
132 struct drm_framebuffer *fb;
133 struct drm_gem_object *gobj = NULL;
134 struct device *device = &dev->pdev->dev;
135 struct mgag200_bo *bo;
140 mode_cmd.width = sizes->surface_width;
141 mode_cmd.height = sizes->surface_height;
142 mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7) / 8);
144 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
145 sizes->surface_depth);
146 size = mode_cmd.pitches[0] * mode_cmd.height;
148 ret = mgag200fb_create_object(mfbdev, &mode_cmd, &gobj);
150 DRM_ERROR("failed to create fbcon backing object %d\n", ret);
153 bo = gem_to_mga_bo(gobj);
155 sysram = vmalloc(size);
159 info = framebuffer_alloc(0, device);
165 ret = mgag200_framebuffer_init(dev, &mfbdev->mfb, &mode_cmd, gobj);
169 mfbdev->sysram = sysram;
172 fb = &mfbdev->mfb.base;
175 mfbdev->helper.fb = fb;
176 mfbdev->helper.fbdev = info;
178 ret = fb_alloc_cmap(&info->cmap, 256, 0);
180 DRM_ERROR("%s: can't allocate color map\n", info->fix.id);
185 strcpy(info->fix.id, "mgadrmfb");
187 info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
188 info->fbops = &mgag200fb_ops;
190 /* setup aperture base/size for vesafb takeover */
191 info->apertures = alloc_apertures(1);
192 if (!info->apertures) {
196 info->apertures->ranges[0].base = mdev->dev->mode_config.fb_base;
197 info->apertures->ranges[0].size = mdev->mc.vram_size;
199 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
200 drm_fb_helper_fill_var(info, &mfbdev->helper, sizes->fb_width,
203 info->screen_base = sysram;
204 info->screen_size = size;
205 info->pixmap.flags = FB_PIXMAP_SYSTEM;
207 DRM_DEBUG_KMS("allocated %dx%d\n",
208 fb->width, fb->height);
214 static int mga_fbdev_destroy(struct drm_device *dev,
215 struct mga_fbdev *mfbdev)
217 struct fb_info *info;
218 struct mga_framebuffer *mfb = &mfbdev->mfb;
220 if (mfbdev->helper.fbdev) {
221 info = mfbdev->helper.fbdev;
223 unregister_framebuffer(info);
225 fb_dealloc_cmap(&info->cmap);
226 framebuffer_release(info);
230 drm_gem_object_unreference_unlocked(mfb->obj);
233 drm_fb_helper_fini(&mfbdev->helper);
234 vfree(mfbdev->sysram);
235 drm_framebuffer_unregister_private(&mfb->base);
236 drm_framebuffer_cleanup(&mfb->base);
241 static struct drm_fb_helper_funcs mga_fb_helper_funcs = {
242 .gamma_set = mga_crtc_fb_gamma_set,
243 .gamma_get = mga_crtc_fb_gamma_get,
244 .fb_probe = mgag200fb_create,
247 int mgag200_fbdev_init(struct mga_device *mdev)
249 struct mga_fbdev *mfbdev;
252 mfbdev = kzalloc(sizeof(struct mga_fbdev), GFP_KERNEL);
256 mdev->mfbdev = mfbdev;
257 mfbdev->helper.funcs = &mga_fb_helper_funcs;
259 ret = drm_fb_helper_init(mdev->dev, &mfbdev->helper,
260 mdev->num_crtc, MGAG200FB_CONN_LIMIT);
265 drm_fb_helper_single_add_all_connectors(&mfbdev->helper);
267 /* disable all the possible outputs/crtcs before entering KMS mode */
268 drm_helper_disable_unused_functions(mdev->dev);
270 drm_fb_helper_initial_config(&mfbdev->helper, 32);
275 void mgag200_fbdev_fini(struct mga_device *mdev)
280 mga_fbdev_destroy(mdev->dev, mdev->mfbdev);