drivers/gpu/drm/ast/ast_fb.c

   1 /*
   2  * Copyright 2012 Red Hat Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the
   6  * "Software"), to deal in the Software without restriction, including
   7  * without limitation the rights to use, copy, modify, merge, publish,
   8  * distribute, sub license, and/or sell copies of the Software, and to
   9  * permit persons to whom the Software is furnished to do so, subject to
  10  * the following conditions:
  11  *
  12  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  13  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  14  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  15  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  16  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  17  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  18  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  19  *
  20  * The above copyright notice and this permission notice (including the
  21  * next paragraph) shall be included in all copies or substantial portions
  22  * of the Software.
  23  *
  24  */
  25 /*
  26  * Authors: Dave Airlie <airlied@redhat.com>
  27  */
  28 #include <linux/module.h>
  29 #include <linux/kernel.h>
  30 #include <linux/errno.h>
  31 #include <linux/string.h>
  32 #include <linux/mm.h>
  33 #include <linux/tty.h>
  34 #include <linux/sysrq.h>
  35 #include <linux/delay.h>
  36 #include <linux/init.h>
  37
  38
  39 #include <drm/drmP.h>
  40 #include <drm/drm_crtc.h>
  41 #include <drm/drm_fb_helper.h>
  42 #include <drm/drm_util.h>
  43 #include <drm/drm_crtc_helper.h>
  44
  45 #include "ast_drv.h"
  46
  47 static void ast_dirty_update(struct ast_fbdev *afbdev,
  48                              int x, int y, int width, int height)
  49 {
  50         int i;
  51         struct drm_gem_object *obj;
  52         struct ast_bo *bo;
  53         int src_offset, dst_offset;
  54         int bpp = afbdev->afb.base.format->cpp[0];
  55         int ret = -EBUSY;
  56         bool unmap = false;
  57         bool store_for_later = false;
  58         int x2, y2;
  59         unsigned long flags;
  60
  61         obj = afbdev->afb.obj;
  62         bo = gem_to_ast_bo(obj);
  63
  64         /*
  65          * try and reserve the BO, if we fail with busy
  66          * then the BO is being moved and we should
  67          * store up the damage until later.
  68          */
  69         if (drm_can_sleep())
  70                 ret = ast_bo_reserve(bo, true);
  71         if (ret) {
  72                 if (ret != -EBUSY)
  73                         return;
  74
  75                 store_for_later = true;
  76         }
  77
  78         x2 = x + width - 1;
  79         y2 = y + height - 1;
  80         spin_lock_irqsave(&afbdev->dirty_lock, flags);
  81
  82         if (afbdev->y1 < y)
  83                 y = afbdev->y1;
  84         if (afbdev->y2 > y2)
  85                 y2 = afbdev->y2;
  86         if (afbdev->x1 < x)
  87                 x = afbdev->x1;
  88         if (afbdev->x2 > x2)
  89                 x2 = afbdev->x2;
  90
  91         if (store_for_later) {
  92                 afbdev->x1 = x;
  93                 afbdev->x2 = x2;
  94                 afbdev->y1 = y;
  95                 afbdev->y2 = y2;
  96                 spin_unlock_irqrestore(&afbdev->dirty_lock, flags);
  97                 return;
  98         }
  99
 100         afbdev->x1 = afbdev->y1 = INT_MAX;
 101         afbdev->x2 = afbdev->y2 = 0;
 102         spin_unlock_irqrestore(&afbdev->dirty_lock, flags);
 103
 104         if (!bo->kmap.virtual) {
 105                 ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
 106                 if (ret) {
 107                         DRM_ERROR("failed to kmap fb updates\n");
 108                         ast_bo_unreserve(bo);
 109                         return;
 110                 }
 111                 unmap = true;
 112         }
 113         for (i = y; i <= y2; i++) {
 114                 /* assume equal stride for now */
 115                 src_offset = dst_offset = i * afbdev->afb.base.pitches[0] + (x * bpp);
 116                 memcpy_toio(bo->kmap.virtual + src_offset, afbdev->sysram + src_offset, (x2 - x + 1) * bpp);
 117
 118         }
 119         if (unmap)
 120                 ttm_bo_kunmap(&bo->kmap);
 121
 122         ast_bo_unreserve(bo);
 123 }
 124
 125 static void ast_fillrect(struct fb_info *info,
 126                          const struct fb_fillrect *rect)
 127 {
 128         struct ast_fbdev *afbdev = info->par;
 129         drm_fb_helper_sys_fillrect(info, rect);
 130         ast_dirty_update(afbdev, rect->dx, rect->dy, rect->width,
 131                          rect->height);
 132 }
 133
 134 static void ast_copyarea(struct fb_info *info,
 135                          const struct fb_copyarea *area)
 136 {
 137         struct ast_fbdev *afbdev = info->par;
 138         drm_fb_helper_sys_copyarea(info, area);
 139         ast_dirty_update(afbdev, area->dx, area->dy, area->width,
 140                          area->height);
 141 }
 142
 143 static void ast_imageblit(struct fb_info *info,
 144                           const struct fb_image *image)
 145 {
 146         struct ast_fbdev *afbdev = info->par;
 147         drm_fb_helper_sys_imageblit(info, image);
 148         ast_dirty_update(afbdev, image->dx, image->dy, image->width,
 149                          image->height);
 150 }
 151
 152 static struct fb_ops astfb_ops = {
 153         .owner = THIS_MODULE,
 154         .fb_check_var = drm_fb_helper_check_var,
 155         .fb_set_par = drm_fb_helper_set_par,
 156         .fb_fillrect = ast_fillrect,
 157         .fb_copyarea = ast_copyarea,
 158         .fb_imageblit = ast_imageblit,
 159         .fb_pan_display = drm_fb_helper_pan_display,
 160         .fb_blank = drm_fb_helper_blank,
 161         .fb_setcmap = drm_fb_helper_setcmap,
 162         .fb_debug_enter = drm_fb_helper_debug_enter,
 163         .fb_debug_leave = drm_fb_helper_debug_leave,
 164 };
 165
 166 static int astfb_create_object(struct ast_fbdev *afbdev,
 167                                const struct drm_mode_fb_cmd2 *mode_cmd,
 168                                struct drm_gem_object **gobj_p)
 169 {
 170         struct drm_device *dev = afbdev->helper.dev;
 171         u32 size;
 172         struct drm_gem_object *gobj;
 173         int ret = 0;
 174
 175         size = mode_cmd->pitches[0] * mode_cmd->height;
 176         ret = ast_gem_create(dev, size, true, &gobj);
 177         if (ret)
 178                 return ret;
 179
 180         *gobj_p = gobj;
 181         return ret;
 182 }
 183
 184 static int astfb_create(struct drm_fb_helper *helper,
 185                         struct drm_fb_helper_surface_size *sizes)
 186 {
 187         struct ast_fbdev *afbdev =
 188                 container_of(helper, struct ast_fbdev, helper);
 189         struct drm_device *dev = afbdev->helper.dev;
 190         struct drm_mode_fb_cmd2 mode_cmd;
 191         struct drm_framebuffer *fb;
 192         struct fb_info *info;
 193         int size, ret;
 194         void *sysram;
 195         struct drm_gem_object *gobj = NULL;
 196         mode_cmd.width = sizes->surface_width;
 197         mode_cmd.height = sizes->surface_height;
 198         mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7)/8);
 199
 200         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 201                                                           sizes->surface_depth);
 202
 203         size = mode_cmd.pitches[0] * mode_cmd.height;
 204
 205         ret = astfb_create_object(afbdev, &mode_cmd, &gobj);
 206         if (ret) {
 207                 DRM_ERROR("failed to create fbcon backing object %d\n", ret);
 208                 return ret;
 209         }
 210
 211         sysram = vmalloc(size);
 212         if (!sysram)
 213                 return -ENOMEM;
 214
 215         info = drm_fb_helper_alloc_fbi(helper);
 216         if (IS_ERR(info)) {
 217                 ret = PTR_ERR(info);
 218                 goto out;
 219         }
 220         info->par = afbdev;
 221
 222         ret = ast_framebuffer_init(dev, &afbdev->afb, &mode_cmd, gobj);
 223         if (ret)
 224                 goto out;
 225
 226         afbdev->sysram = sysram;
 227         afbdev->size = size;
 228
 229         fb = &afbdev->afb.base;
 230         afbdev->helper.fb = fb;
 231
 232         strcpy(info->fix.id, "astdrmfb");
 233
 234         info->fbops = &astfb_ops;
 235
 236         info->apertures->ranges[0].base = pci_resource_start(dev->pdev, 0);
 237         info->apertures->ranges[0].size = pci_resource_len(dev->pdev, 0);
 238
 239         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->format->depth);
 240         drm_fb_helper_fill_var(info, &afbdev->helper, sizes->fb_width, sizes->fb_height);
 241
 242         info->screen_base = sysram;
 243         info->screen_size = size;
 244
 245         info->pixmap.flags = FB_PIXMAP_SYSTEM;
 246
 247         DRM_DEBUG_KMS("allocated %dx%d\n",
 248                       fb->width, fb->height);
 249
 250         return 0;
 251
 252 out:
 253         vfree(sysram);
 254         return ret;
 255 }
 256
 257 static const struct drm_fb_helper_funcs ast_fb_helper_funcs = {
 258         .fb_probe = astfb_create,
 259 };
 260
 261 static void ast_fbdev_destroy(struct drm_device *dev,
 262                               struct ast_fbdev *afbdev)
 263 {
 264         struct ast_framebuffer *afb = &afbdev->afb;
 265
 266         drm_helper_force_disable_all(dev);
 267         drm_fb_helper_unregister_fbi(&afbdev->helper);
 268
 269         if (afb->obj) {
 270                 drm_gem_object_put_unlocked(afb->obj);
 271                 afb->obj = NULL;
 272         }
 273         drm_fb_helper_fini(&afbdev->helper);
 274
 275         vfree(afbdev->sysram);
 276         drm_framebuffer_unregister_private(&afb->base);
 277         drm_framebuffer_cleanup(&afb->base);
 278 }
 279
 280 int ast_fbdev_init(struct drm_device *dev)
 281 {
 282         struct ast_private *ast = dev->dev_private;
 283         struct ast_fbdev *afbdev;
 284         int ret;
 285
 286         afbdev = kzalloc(sizeof(struct ast_fbdev), GFP_KERNEL);
 287         if (!afbdev)
 288                 return -ENOMEM;
 289
 290         ast->fbdev = afbdev;
 291         spin_lock_init(&afbdev->dirty_lock);
 292
 293         drm_fb_helper_prepare(dev, &afbdev->helper, &ast_fb_helper_funcs);
 294
 295         ret = drm_fb_helper_init(dev, &afbdev->helper, 1);
 296         if (ret)
 297                 goto free;
 298
 299         ret = drm_fb_helper_single_add_all_connectors(&afbdev->helper);
 300         if (ret)
 301                 goto fini;
 302
 303         /* disable all the possible outputs/crtcs before entering KMS mode */
 304         drm_helper_disable_unused_functions(dev);
 305
 306         ret = drm_fb_helper_initial_config(&afbdev->helper, 32);
 307         if (ret)
 308                 goto fini;
 309
 310         return 0;
 311
 312 fini:
 313         drm_fb_helper_fini(&afbdev->helper);
 314 free:
 315         kfree(afbdev);
 316         return ret;
 317 }
 318
 319 void ast_fbdev_fini(struct drm_device *dev)
 320 {
 321         struct ast_private *ast = dev->dev_private;
 322
 323         if (!ast->fbdev)
 324                 return;
 325
 326         ast_fbdev_destroy(dev, ast->fbdev);
 327         kfree(ast->fbdev);
 328         ast->fbdev = NULL;
 329 }
 330
 331 void ast_fbdev_set_suspend(struct drm_device *dev, int state)
 332 {
 333         struct ast_private *ast = dev->dev_private;
 334
 335         if (!ast->fbdev)
 336                 return;
 337
 338         drm_fb_helper_set_suspend(&ast->fbdev->helper, state);
 339 }
 340
 341 void ast_fbdev_set_base(struct ast_private *ast, unsigned long gpu_addr)
 342 {
 343         ast->fbdev->helper.fbdev->fix.smem_start =
 344                 ast->fbdev->helper.fbdev->apertures->ranges[0].base + gpu_addr;
 345         ast->fbdev->helper.fbdev->fix.smem_len = ast->vram_size - gpu_addr;
 346 }