2 * Copyright 2012 Red Hat
4 * This file is subject to the terms and conditions of the GNU General
5 * Public License version 2. See the file COPYING in the main
6 * directory of this archive for more details.
8 * Authors: Matthew Garrett
11 #include <linux/module.h>
13 #include <drm/drm_fb_helper.h>
14 #include <drm/drm_crtc_helper.h>
16 #include "cirrus_drv.h"
18 static void cirrus_dirty_update(struct cirrus_fbdev *afbdev,
19 int x, int y, int width, int height)
22 struct drm_gem_object *obj;
24 int src_offset, dst_offset;
25 int bpp = afbdev->gfb.base.format->cpp[0];
28 bool store_for_later = false;
32 obj = afbdev->gfb.obj;
33 bo = gem_to_cirrus_bo(obj);
36 * try and reserve the BO, if we fail with busy
37 * then the BO is being moved and we should
38 * store up the damage until later.
41 ret = cirrus_bo_reserve(bo, true);
45 store_for_later = true;
50 spin_lock_irqsave(&afbdev->dirty_lock, flags);
61 if (store_for_later) {
66 spin_unlock_irqrestore(&afbdev->dirty_lock, flags);
70 afbdev->x1 = afbdev->y1 = INT_MAX;
71 afbdev->x2 = afbdev->y2 = 0;
72 spin_unlock_irqrestore(&afbdev->dirty_lock, flags);
74 if (!bo->kmap.virtual) {
75 ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
77 DRM_ERROR("failed to kmap fb updates\n");
78 cirrus_bo_unreserve(bo);
83 for (i = y; i < y + height; i++) {
84 /* assume equal stride for now */
85 src_offset = dst_offset = i * afbdev->gfb.base.pitches[0] + (x * bpp);
86 memcpy_toio(bo->kmap.virtual + src_offset, afbdev->sysram + src_offset, width * bpp);
90 ttm_bo_kunmap(&bo->kmap);
92 cirrus_bo_unreserve(bo);
95 static void cirrus_fillrect(struct fb_info *info,
96 const struct fb_fillrect *rect)
98 struct cirrus_fbdev *afbdev = info->par;
99 drm_fb_helper_sys_fillrect(info, rect);
100 cirrus_dirty_update(afbdev, rect->dx, rect->dy, rect->width,
104 static void cirrus_copyarea(struct fb_info *info,
105 const struct fb_copyarea *area)
107 struct cirrus_fbdev *afbdev = info->par;
108 drm_fb_helper_sys_copyarea(info, area);
109 cirrus_dirty_update(afbdev, area->dx, area->dy, area->width,
113 static void cirrus_imageblit(struct fb_info *info,
114 const struct fb_image *image)
116 struct cirrus_fbdev *afbdev = info->par;
117 drm_fb_helper_sys_imageblit(info, image);
118 cirrus_dirty_update(afbdev, image->dx, image->dy, image->width,
123 static struct fb_ops cirrusfb_ops = {
124 .owner = THIS_MODULE,
125 .fb_check_var = drm_fb_helper_check_var,
126 .fb_set_par = drm_fb_helper_set_par,
127 .fb_fillrect = cirrus_fillrect,
128 .fb_copyarea = cirrus_copyarea,
129 .fb_imageblit = cirrus_imageblit,
130 .fb_pan_display = drm_fb_helper_pan_display,
131 .fb_blank = drm_fb_helper_blank,
132 .fb_setcmap = drm_fb_helper_setcmap,
135 static int cirrusfb_create_object(struct cirrus_fbdev *afbdev,
136 const struct drm_mode_fb_cmd2 *mode_cmd,
137 struct drm_gem_object **gobj_p)
139 struct drm_device *dev = afbdev->helper.dev;
140 struct cirrus_device *cdev = dev->dev_private;
143 struct drm_gem_object *gobj;
146 bpp = drm_format_plane_cpp(mode_cmd->pixel_format, 0) * 8;
148 if (!cirrus_check_framebuffer(cdev, mode_cmd->width, mode_cmd->height,
149 bpp, mode_cmd->pitches[0]))
152 size = mode_cmd->pitches[0] * mode_cmd->height;
153 ret = cirrus_gem_create(dev, size, true, &gobj);
161 static int cirrusfb_create(struct drm_fb_helper *helper,
162 struct drm_fb_helper_surface_size *sizes)
164 struct cirrus_fbdev *gfbdev =
165 container_of(helper, struct cirrus_fbdev, helper);
166 struct cirrus_device *cdev = gfbdev->helper.dev->dev_private;
167 struct fb_info *info;
168 struct drm_framebuffer *fb;
169 struct drm_mode_fb_cmd2 mode_cmd;
171 struct drm_gem_object *gobj = NULL;
172 struct cirrus_bo *bo = NULL;
175 mode_cmd.width = sizes->surface_width;
176 mode_cmd.height = sizes->surface_height;
177 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 = cirrusfb_create_object(gfbdev, &mode_cmd, &gobj);
184 DRM_ERROR("failed to create fbcon backing object %d\n", ret);
188 bo = gem_to_cirrus_bo(gobj);
190 sysram = vmalloc(size);
194 info = drm_fb_helper_alloc_fbi(helper);
196 return PTR_ERR(info);
200 ret = cirrus_framebuffer_init(cdev->dev, &gfbdev->gfb, &mode_cmd, gobj);
204 gfbdev->sysram = sysram;
207 fb = &gfbdev->gfb.base;
209 DRM_INFO("fb is NULL\n");
214 gfbdev->helper.fb = fb;
216 strcpy(info->fix.id, "cirrusdrmfb");
218 info->fbops = &cirrusfb_ops;
220 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->format->depth);
221 drm_fb_helper_fill_var(info, &gfbdev->helper, sizes->fb_width,
224 /* setup aperture base/size for vesafb takeover */
225 info->apertures->ranges[0].base = cdev->dev->mode_config.fb_base;
226 info->apertures->ranges[0].size = cdev->mc.vram_size;
228 info->fix.smem_start = cdev->dev->mode_config.fb_base;
229 info->fix.smem_len = cdev->mc.vram_size;
231 info->screen_base = sysram;
232 info->screen_size = size;
234 info->fix.mmio_start = 0;
235 info->fix.mmio_len = 0;
237 DRM_INFO("fb mappable at 0x%lX\n", info->fix.smem_start);
238 DRM_INFO("vram aper at 0x%lX\n", (unsigned long)info->fix.smem_start);
239 DRM_INFO("size %lu\n", (unsigned long)info->fix.smem_len);
240 DRM_INFO("fb depth is %d\n", fb->format->depth);
241 DRM_INFO(" pitch is %d\n", fb->pitches[0]);
246 static int cirrus_fbdev_destroy(struct drm_device *dev,
247 struct cirrus_fbdev *gfbdev)
249 struct cirrus_framebuffer *gfb = &gfbdev->gfb;
251 drm_fb_helper_unregister_fbi(&gfbdev->helper);
254 drm_gem_object_put_unlocked(gfb->obj);
258 vfree(gfbdev->sysram);
259 drm_fb_helper_fini(&gfbdev->helper);
260 drm_framebuffer_unregister_private(&gfb->base);
261 drm_framebuffer_cleanup(&gfb->base);
266 static const struct drm_fb_helper_funcs cirrus_fb_helper_funcs = {
267 .fb_probe = cirrusfb_create,
270 int cirrus_fbdev_init(struct cirrus_device *cdev)
272 struct cirrus_fbdev *gfbdev;
277 gfbdev = kzalloc(sizeof(struct cirrus_fbdev), GFP_KERNEL);
281 cdev->mode_info.gfbdev = gfbdev;
282 spin_lock_init(&gfbdev->dirty_lock);
284 drm_fb_helper_prepare(cdev->dev, &gfbdev->helper,
285 &cirrus_fb_helper_funcs);
287 ret = drm_fb_helper_init(cdev->dev, &gfbdev->helper,
288 CIRRUSFB_CONN_LIMIT);
292 ret = drm_fb_helper_single_add_all_connectors(&gfbdev->helper);
296 /* disable all the possible outputs/crtcs before entering KMS mode */
297 drm_helper_disable_unused_functions(cdev->dev);
299 return drm_fb_helper_initial_config(&gfbdev->helper, bpp_sel);
302 void cirrus_fbdev_fini(struct cirrus_device *cdev)
304 if (!cdev->mode_info.gfbdev)
307 cirrus_fbdev_destroy(cdev->dev, cdev->mode_info.gfbdev);
308 kfree(cdev->mode_info.gfbdev);
309 cdev->mode_info.gfbdev = NULL;