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>
18 #include "cirrus_drv.h"
20 static void cirrus_dirty_update(struct cirrus_fbdev *afbdev,
21 int x, int y, int width, int height)
24 struct drm_gem_object *obj;
26 int src_offset, dst_offset;
27 int bpp = (afbdev->gfb.base.bits_per_pixel + 7)/8;
30 bool store_for_later = false;
34 obj = afbdev->gfb.obj;
35 bo = gem_to_cirrus_bo(obj);
38 * try and reserve the BO, if we fail with busy
39 * then the BO is being moved and we should
40 * store up the damage until later.
42 ret = cirrus_bo_reserve(bo, true);
46 store_for_later = true;
51 spin_lock_irqsave(&afbdev->dirty_lock, flags);
62 if (store_for_later) {
67 spin_unlock_irqrestore(&afbdev->dirty_lock, flags);
71 afbdev->x1 = afbdev->y1 = INT_MAX;
72 afbdev->x2 = afbdev->y2 = 0;
73 spin_unlock_irqrestore(&afbdev->dirty_lock, flags);
75 if (!bo->kmap.virtual) {
76 ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
78 DRM_ERROR("failed to kmap fb updates\n");
79 cirrus_bo_unreserve(bo);
84 for (i = y; i < y + height; i++) {
85 /* assume equal stride for now */
86 src_offset = dst_offset = i * afbdev->gfb.base.pitches[0] + (x * bpp);
87 memcpy_toio(bo->kmap.virtual + src_offset, afbdev->sysram + src_offset, width * bpp);
91 ttm_bo_kunmap(&bo->kmap);
93 cirrus_bo_unreserve(bo);
96 static void cirrus_fillrect(struct fb_info *info,
97 const struct fb_fillrect *rect)
99 struct cirrus_fbdev *afbdev = info->par;
100 sys_fillrect(info, rect);
101 cirrus_dirty_update(afbdev, rect->dx, rect->dy, rect->width,
105 static void cirrus_copyarea(struct fb_info *info,
106 const struct fb_copyarea *area)
108 struct cirrus_fbdev *afbdev = info->par;
109 sys_copyarea(info, area);
110 cirrus_dirty_update(afbdev, area->dx, area->dy, area->width,
114 static void cirrus_imageblit(struct fb_info *info,
115 const struct fb_image *image)
117 struct cirrus_fbdev *afbdev = info->par;
118 sys_imageblit(info, image);
119 cirrus_dirty_update(afbdev, image->dx, image->dy, image->width,
124 static struct fb_ops cirrusfb_ops = {
125 .owner = THIS_MODULE,
126 .fb_check_var = drm_fb_helper_check_var,
127 .fb_set_par = drm_fb_helper_set_par,
128 .fb_fillrect = cirrus_fillrect,
129 .fb_copyarea = cirrus_copyarea,
130 .fb_imageblit = cirrus_imageblit,
131 .fb_pan_display = drm_fb_helper_pan_display,
132 .fb_blank = drm_fb_helper_blank,
133 .fb_setcmap = drm_fb_helper_setcmap,
136 static int cirrusfb_create_object(struct cirrus_fbdev *afbdev,
137 struct drm_mode_fb_cmd2 *mode_cmd,
138 struct drm_gem_object **gobj_p)
140 struct drm_device *dev = afbdev->helper.dev;
143 struct drm_gem_object *gobj;
146 drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
150 size = mode_cmd->pitches[0] * mode_cmd->height;
151 ret = cirrus_gem_create(dev, size, true, &gobj);
159 static int cirrusfb_create(struct drm_fb_helper *helper,
160 struct drm_fb_helper_surface_size *sizes)
162 struct cirrus_fbdev *gfbdev = (struct cirrus_fbdev *)helper;
163 struct drm_device *dev = gfbdev->helper.dev;
164 struct cirrus_device *cdev = gfbdev->helper.dev->dev_private;
165 struct fb_info *info;
166 struct drm_framebuffer *fb;
167 struct drm_mode_fb_cmd2 mode_cmd;
168 struct device *device = &dev->pdev->dev;
170 struct drm_gem_object *gobj = NULL;
171 struct cirrus_bo *bo = NULL;
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);
177 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
178 sizes->surface_depth);
179 size = mode_cmd.pitches[0] * mode_cmd.height;
181 ret = cirrusfb_create_object(gfbdev, &mode_cmd, &gobj);
183 DRM_ERROR("failed to create fbcon backing object %d\n", ret);
187 bo = gem_to_cirrus_bo(gobj);
189 sysram = vmalloc(size);
193 info = framebuffer_alloc(0, device);
199 ret = cirrus_framebuffer_init(cdev->dev, &gfbdev->gfb, &mode_cmd, gobj);
203 gfbdev->sysram = sysram;
206 fb = &gfbdev->gfb.base;
208 DRM_INFO("fb is NULL\n");
213 gfbdev->helper.fb = fb;
214 gfbdev->helper.fbdev = info;
216 strcpy(info->fix.id, "cirrusdrmfb");
219 info->flags = FBINFO_DEFAULT;
220 info->fbops = &cirrusfb_ops;
222 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
223 drm_fb_helper_fill_var(info, &gfbdev->helper, sizes->fb_width,
226 /* setup aperture base/size for vesafb takeover */
227 info->apertures = alloc_apertures(1);
228 if (!info->apertures) {
232 info->apertures->ranges[0].base = cdev->dev->mode_config.fb_base;
233 info->apertures->ranges[0].size = cdev->mc.vram_size;
235 info->screen_base = sysram;
236 info->screen_size = size;
238 info->fix.mmio_start = 0;
239 info->fix.mmio_len = 0;
241 ret = fb_alloc_cmap(&info->cmap, 256, 0);
243 DRM_ERROR("%s: can't allocate color map\n", info->fix.id);
248 DRM_INFO("fb mappable at 0x%lX\n", info->fix.smem_start);
249 DRM_INFO("vram aper at 0x%lX\n", (unsigned long)info->fix.smem_start);
250 DRM_INFO("size %lu\n", (unsigned long)info->fix.smem_len);
251 DRM_INFO("fb depth is %d\n", fb->depth);
252 DRM_INFO(" pitch is %d\n", fb->pitches[0]);
259 static int cirrus_fbdev_destroy(struct drm_device *dev,
260 struct cirrus_fbdev *gfbdev)
262 struct fb_info *info;
263 struct cirrus_framebuffer *gfb = &gfbdev->gfb;
265 if (gfbdev->helper.fbdev) {
266 info = gfbdev->helper.fbdev;
268 unregister_framebuffer(info);
270 fb_dealloc_cmap(&info->cmap);
271 framebuffer_release(info);
275 drm_gem_object_unreference_unlocked(gfb->obj);
279 vfree(gfbdev->sysram);
280 drm_fb_helper_fini(&gfbdev->helper);
281 drm_framebuffer_unregister_private(&gfb->base);
282 drm_framebuffer_cleanup(&gfb->base);
287 static struct drm_fb_helper_funcs cirrus_fb_helper_funcs = {
288 .gamma_set = cirrus_crtc_fb_gamma_set,
289 .gamma_get = cirrus_crtc_fb_gamma_get,
290 .fb_probe = cirrusfb_create,
293 int cirrus_fbdev_init(struct cirrus_device *cdev)
295 struct cirrus_fbdev *gfbdev;
300 gfbdev = kzalloc(sizeof(struct cirrus_fbdev), GFP_KERNEL);
304 cdev->mode_info.gfbdev = gfbdev;
305 gfbdev->helper.funcs = &cirrus_fb_helper_funcs;
306 spin_lock_init(&gfbdev->dirty_lock);
308 ret = drm_fb_helper_init(cdev->dev, &gfbdev->helper,
309 cdev->num_crtc, CIRRUSFB_CONN_LIMIT);
314 drm_fb_helper_single_add_all_connectors(&gfbdev->helper);
316 /* disable all the possible outputs/crtcs before entering KMS mode */
317 drm_helper_disable_unused_functions(cdev->dev);
318 drm_fb_helper_initial_config(&gfbdev->helper, bpp_sel);
323 void cirrus_fbdev_fini(struct cirrus_device *cdev)
325 if (!cdev->mode_info.gfbdev)
328 cirrus_fbdev_destroy(cdev->dev, cdev->mode_info.gfbdev);
329 kfree(cdev->mode_info.gfbdev);
330 cdev->mode_info.gfbdev = NULL;