cirrus_fbdev.c revision 10a231026574f9ec9761b6435394b8830b485e4e
1/* 2 * Copyright 2012 Red Hat 3 * 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. 7 * 8 * Authors: Matthew Garrett 9 * Dave Airlie 10 */ 11#include <linux/module.h> 12#include <drm/drmP.h> 13#include <drm/drm_fb_helper.h> 14#include <drm/drm_crtc_helper.h> 15 16#include <linux/fb.h> 17 18#include "cirrus_drv.h" 19 20static void cirrus_dirty_update(struct cirrus_fbdev *afbdev, 21 int x, int y, int width, int height) 22{ 23 int i; 24 struct drm_gem_object *obj; 25 struct cirrus_bo *bo; 26 int src_offset, dst_offset; 27 int bpp = (afbdev->gfb.base.bits_per_pixel + 7)/8; 28 int ret = -EBUSY; 29 bool unmap = false; 30 bool store_for_later = false; 31 int x2, y2; 32 unsigned long flags; 33 34 obj = afbdev->gfb.obj; 35 bo = gem_to_cirrus_bo(obj); 36 37 /* 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. 41 */ 42 if (drm_can_sleep()) 43 ret = cirrus_bo_reserve(bo, true); 44 if (ret) { 45 if (ret != -EBUSY) 46 return; 47 store_for_later = true; 48 } 49 50 x2 = x + width - 1; 51 y2 = y + height - 1; 52 spin_lock_irqsave(&afbdev->dirty_lock, flags); 53 54 if (afbdev->y1 < y) 55 y = afbdev->y1; 56 if (afbdev->y2 > y2) 57 y2 = afbdev->y2; 58 if (afbdev->x1 < x) 59 x = afbdev->x1; 60 if (afbdev->x2 > x2) 61 x2 = afbdev->x2; 62 63 if (store_for_later) { 64 afbdev->x1 = x; 65 afbdev->x2 = x2; 66 afbdev->y1 = y; 67 afbdev->y2 = y2; 68 spin_unlock_irqrestore(&afbdev->dirty_lock, flags); 69 return; 70 } 71 72 afbdev->x1 = afbdev->y1 = INT_MAX; 73 afbdev->x2 = afbdev->y2 = 0; 74 spin_unlock_irqrestore(&afbdev->dirty_lock, flags); 75 76 if (!bo->kmap.virtual) { 77 ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap); 78 if (ret) { 79 DRM_ERROR("failed to kmap fb updates\n"); 80 cirrus_bo_unreserve(bo); 81 return; 82 } 83 unmap = true; 84 } 85 for (i = y; i < y + height; i++) { 86 /* assume equal stride for now */ 87 src_offset = dst_offset = i * afbdev->gfb.base.pitches[0] + (x * bpp); 88 memcpy_toio(bo->kmap.virtual + src_offset, afbdev->sysram + src_offset, width * bpp); 89 90 } 91 if (unmap) 92 ttm_bo_kunmap(&bo->kmap); 93 94 cirrus_bo_unreserve(bo); 95} 96 97static void cirrus_fillrect(struct fb_info *info, 98 const struct fb_fillrect *rect) 99{ 100 struct cirrus_fbdev *afbdev = info->par; 101 sys_fillrect(info, rect); 102 cirrus_dirty_update(afbdev, rect->dx, rect->dy, rect->width, 103 rect->height); 104} 105 106static void cirrus_copyarea(struct fb_info *info, 107 const struct fb_copyarea *area) 108{ 109 struct cirrus_fbdev *afbdev = info->par; 110 sys_copyarea(info, area); 111 cirrus_dirty_update(afbdev, area->dx, area->dy, area->width, 112 area->height); 113} 114 115static void cirrus_imageblit(struct fb_info *info, 116 const struct fb_image *image) 117{ 118 struct cirrus_fbdev *afbdev = info->par; 119 sys_imageblit(info, image); 120 cirrus_dirty_update(afbdev, image->dx, image->dy, image->width, 121 image->height); 122} 123 124 125static struct fb_ops cirrusfb_ops = { 126 .owner = THIS_MODULE, 127 .fb_check_var = drm_fb_helper_check_var, 128 .fb_set_par = drm_fb_helper_set_par, 129 .fb_fillrect = cirrus_fillrect, 130 .fb_copyarea = cirrus_copyarea, 131 .fb_imageblit = cirrus_imageblit, 132 .fb_pan_display = drm_fb_helper_pan_display, 133 .fb_blank = drm_fb_helper_blank, 134 .fb_setcmap = drm_fb_helper_setcmap, 135}; 136 137static int cirrusfb_create_object(struct cirrus_fbdev *afbdev, 138 struct drm_mode_fb_cmd2 *mode_cmd, 139 struct drm_gem_object **gobj_p) 140{ 141 struct drm_device *dev = afbdev->helper.dev; 142 u32 bpp, depth; 143 u32 size; 144 struct drm_gem_object *gobj; 145 146 int ret = 0; 147 drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp); 148 149 if (bpp > 24) 150 return -EINVAL; 151 size = mode_cmd->pitches[0] * mode_cmd->height; 152 ret = cirrus_gem_create(dev, size, true, &gobj); 153 if (ret) 154 return ret; 155 156 *gobj_p = gobj; 157 return ret; 158} 159 160static int cirrusfb_create(struct drm_fb_helper *helper, 161 struct drm_fb_helper_surface_size *sizes) 162{ 163 struct cirrus_fbdev *gfbdev = (struct cirrus_fbdev *)helper; 164 struct drm_device *dev = gfbdev->helper.dev; 165 struct cirrus_device *cdev = gfbdev->helper.dev->dev_private; 166 struct fb_info *info; 167 struct drm_framebuffer *fb; 168 struct drm_mode_fb_cmd2 mode_cmd; 169 struct device *device = &dev->pdev->dev; 170 void *sysram; 171 struct drm_gem_object *gobj = NULL; 172 struct cirrus_bo *bo = NULL; 173 int size, ret; 174 175 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; 181 182 ret = cirrusfb_create_object(gfbdev, &mode_cmd, &gobj); 183 if (ret) { 184 DRM_ERROR("failed to create fbcon backing object %d\n", ret); 185 return ret; 186 } 187 188 bo = gem_to_cirrus_bo(gobj); 189 190 sysram = vmalloc(size); 191 if (!sysram) 192 return -ENOMEM; 193 194 info = framebuffer_alloc(0, device); 195 if (info == NULL) 196 return -ENOMEM; 197 198 info->par = gfbdev; 199 200 ret = cirrus_framebuffer_init(cdev->dev, &gfbdev->gfb, &mode_cmd, gobj); 201 if (ret) 202 return ret; 203 204 gfbdev->sysram = sysram; 205 gfbdev->size = size; 206 207 fb = &gfbdev->gfb.base; 208 if (!fb) { 209 DRM_INFO("fb is NULL\n"); 210 return -EINVAL; 211 } 212 213 /* setup helper */ 214 gfbdev->helper.fb = fb; 215 gfbdev->helper.fbdev = info; 216 217 strcpy(info->fix.id, "cirrusdrmfb"); 218 219 220 info->flags = FBINFO_DEFAULT; 221 info->fbops = &cirrusfb_ops; 222 223 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth); 224 drm_fb_helper_fill_var(info, &gfbdev->helper, sizes->fb_width, 225 sizes->fb_height); 226 227 /* setup aperture base/size for vesafb takeover */ 228 info->apertures = alloc_apertures(1); 229 if (!info->apertures) { 230 ret = -ENOMEM; 231 goto out_iounmap; 232 } 233 info->apertures->ranges[0].base = cdev->dev->mode_config.fb_base; 234 info->apertures->ranges[0].size = cdev->mc.vram_size; 235 236 info->fix.smem_start = cdev->dev->mode_config.fb_base; 237 info->fix.smem_len = cdev->mc.vram_size; 238 239 info->screen_base = sysram; 240 info->screen_size = size; 241 242 info->fix.mmio_start = 0; 243 info->fix.mmio_len = 0; 244 245 ret = fb_alloc_cmap(&info->cmap, 256, 0); 246 if (ret) { 247 DRM_ERROR("%s: can't allocate color map\n", info->fix.id); 248 ret = -ENOMEM; 249 goto out_iounmap; 250 } 251 252 DRM_INFO("fb mappable at 0x%lX\n", info->fix.smem_start); 253 DRM_INFO("vram aper at 0x%lX\n", (unsigned long)info->fix.smem_start); 254 DRM_INFO("size %lu\n", (unsigned long)info->fix.smem_len); 255 DRM_INFO("fb depth is %d\n", fb->depth); 256 DRM_INFO(" pitch is %d\n", fb->pitches[0]); 257 258 return 0; 259out_iounmap: 260 return ret; 261} 262 263static int cirrus_fbdev_destroy(struct drm_device *dev, 264 struct cirrus_fbdev *gfbdev) 265{ 266 struct fb_info *info; 267 struct cirrus_framebuffer *gfb = &gfbdev->gfb; 268 269 if (gfbdev->helper.fbdev) { 270 info = gfbdev->helper.fbdev; 271 272 unregister_framebuffer(info); 273 if (info->cmap.len) 274 fb_dealloc_cmap(&info->cmap); 275 framebuffer_release(info); 276 } 277 278 if (gfb->obj) { 279 drm_gem_object_unreference_unlocked(gfb->obj); 280 gfb->obj = NULL; 281 } 282 283 vfree(gfbdev->sysram); 284 drm_fb_helper_fini(&gfbdev->helper); 285 drm_framebuffer_unregister_private(&gfb->base); 286 drm_framebuffer_cleanup(&gfb->base); 287 288 return 0; 289} 290 291static const struct drm_fb_helper_funcs cirrus_fb_helper_funcs = { 292 .gamma_set = cirrus_crtc_fb_gamma_set, 293 .gamma_get = cirrus_crtc_fb_gamma_get, 294 .fb_probe = cirrusfb_create, 295}; 296 297int cirrus_fbdev_init(struct cirrus_device *cdev) 298{ 299 struct cirrus_fbdev *gfbdev; 300 int ret; 301 int bpp_sel = 24; 302 303 /*bpp_sel = 8;*/ 304 gfbdev = kzalloc(sizeof(struct cirrus_fbdev), GFP_KERNEL); 305 if (!gfbdev) 306 return -ENOMEM; 307 308 cdev->mode_info.gfbdev = gfbdev; 309 spin_lock_init(&gfbdev->dirty_lock); 310 311 drm_fb_helper_prepare(cdev->dev, &gfbdev->helper, 312 &cirrus_fb_helper_funcs); 313 314 ret = drm_fb_helper_init(cdev->dev, &gfbdev->helper, 315 cdev->num_crtc, CIRRUSFB_CONN_LIMIT); 316 if (ret) { 317 kfree(gfbdev); 318 return ret; 319 } 320 drm_fb_helper_single_add_all_connectors(&gfbdev->helper); 321 322 /* disable all the possible outputs/crtcs before entering KMS mode */ 323 drm_helper_disable_unused_functions(cdev->dev); 324 drm_fb_helper_initial_config(&gfbdev->helper, bpp_sel); 325 326 return 0; 327} 328 329void cirrus_fbdev_fini(struct cirrus_device *cdev) 330{ 331 if (!cdev->mode_info.gfbdev) 332 return; 333 334 cirrus_fbdev_destroy(cdev->dev, cdev->mode_info.gfbdev); 335 kfree(cdev->mode_info.gfbdev); 336 cdev->mode_info.gfbdev = NULL; 337} 338