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_vram_object *gbo;
  52         int src_offset, dst_offset;
  53         int bpp = afbdev->afb.base.format->cpp[0];
  54         int ret;
  55         u8 *dst;
  56         bool unmap = false;
  57         bool store_for_later = false;
  58         int x2, y2;
  59         unsigned long flags;
  60
  61         gbo = drm_gem_vram_of_gem(afbdev->afb.obj);
  62
  63         if (drm_can_sleep()) {
  64                 /* We pin the BO so it won't be moved during the
  65                  * update. The actual location, video RAM or system
  66                  * memory, is not important.
  67                  */
  68                 ret = drm_gem_vram_pin(gbo, 0);
  69                 if (ret) {
  70                         if (ret != -EBUSY)
  71                                 return;
  72                         store_for_later = true;
  73                 }
  74         } else {
  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         dst = drm_gem_vram_kmap(gbo, false, NULL);
 105         if (IS_ERR(dst)) {
 106                 DRM_ERROR("failed to kmap fb updates\n");
 107                 goto out;
 108         } else if (!dst) {
 109                 dst = drm_gem_vram_kmap(gbo, true, NULL);
 110                 if (IS_ERR(dst)) {
 111                         DRM_ERROR("failed to kmap fb updates\n");
 112                         goto out;
 113                 }
 114                 unmap = true;
 115         }
 116
 117         for (i = y; i <= y2; i++) {
 118                 /* assume equal stride for now */
 119                 src_offset = dst_offset =
 120                         i * afbdev->afb.base.pitches[0] + (x * bpp);
 121                 memcpy_toio(dst + dst_offset, afbdev->sysram + src_offset,
 122                             (x2 - x + 1) * bpp);
 123         }
 124
 125         if (unmap)
 126                 drm_gem_vram_kunmap(gbo);
 127
 128 out:
 129         drm_gem_vram_unpin(gbo);
 130 }
 131
 132 static void ast_fillrect(struct fb_info *info,
 133                          const struct fb_fillrect *rect)
 134 {
 135         struct ast_fbdev *afbdev = info->par;
 136         drm_fb_helper_sys_fillrect(info, rect);
 137         ast_dirty_update(afbdev, rect->dx, rect->dy, rect->width,
 138                          rect->height);
 139 }
 140
 141 static void ast_copyarea(struct fb_info *info,
 142                          const struct fb_copyarea *area)
 143 {
 144         struct ast_fbdev *afbdev = info->par;
 145         drm_fb_helper_sys_copyarea(info, area);
 146         ast_dirty_update(afbdev, area->dx, area->dy, area->width,
 147                          area->height);
 148 }
 149
 150 static void ast_imageblit(struct fb_info *info,
 151                           const struct fb_image *image)
 152 {
 153         struct ast_fbdev *afbdev = info->par;
 154         drm_fb_helper_sys_imageblit(info, image);
 155         ast_dirty_update(afbdev, image->dx, image->dy, image->width,
 156                          image->height);
 157 }
 158
 159 static struct fb_ops astfb_ops = {
 160         .owner = THIS_MODULE,
 161         .fb_check_var = drm_fb_helper_check_var,
 162         .fb_set_par = drm_fb_helper_set_par,
 163         .fb_fillrect = ast_fillrect,
 164         .fb_copyarea = ast_copyarea,
 165         .fb_imageblit = ast_imageblit,
 166         .fb_pan_display = drm_fb_helper_pan_display,
 167         .fb_blank = drm_fb_helper_blank,
 168         .fb_setcmap = drm_fb_helper_setcmap,
 169 };
 170
 171 static int astfb_create_object(struct ast_fbdev *afbdev,
 172                                const struct drm_mode_fb_cmd2 *mode_cmd,
 173                                struct drm_gem_object **gobj_p)
 174 {
 175         struct drm_device *dev = afbdev->helper.dev;
 176         u32 size;
 177         struct drm_gem_object *gobj;
 178         int ret = 0;
 179
 180         size = mode_cmd->pitches[0] * mode_cmd->height;
 181         ret = ast_gem_create(dev, size, true, &gobj);
 182         if (ret)
 183                 return ret;
 184
 185         *gobj_p = gobj;
 186         return ret;
 187 }
 188
 189 static int astfb_create(struct drm_fb_helper *helper,
 190                         struct drm_fb_helper_surface_size *sizes)
 191 {
 192         struct ast_fbdev *afbdev =
 193                 container_of(helper, struct ast_fbdev, helper);
 194         struct drm_device *dev = afbdev->helper.dev;
 195         struct drm_mode_fb_cmd2 mode_cmd;
 196         struct drm_framebuffer *fb;
 197         struct fb_info *info;
 198         int size, ret;
 199         void *sysram;
 200         struct drm_gem_object *gobj = NULL;
 201         mode_cmd.width = sizes->surface_width;
 202         mode_cmd.height = sizes->surface_height;
 203         mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7)/8);
 204
 205         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 206                                                           sizes->surface_depth);
 207
 208         size = mode_cmd.pitches[0] * mode_cmd.height;
 209
 210         ret = astfb_create_object(afbdev, &mode_cmd, &gobj);
 211         if (ret) {
 212                 DRM_ERROR("failed to create fbcon backing object %d\n", ret);
 213                 return ret;
 214         }
 215
 216         sysram = vmalloc(size);
 217         if (!sysram)
 218                 return -ENOMEM;
 219
 220         info = drm_fb_helper_alloc_fbi(helper);
 221         if (IS_ERR(info)) {
 222                 ret = PTR_ERR(info);
 223                 goto out;
 224         }
 225         ret = ast_framebuffer_init(dev, &afbdev->afb, &mode_cmd, gobj);
 226         if (ret)
 227                 goto out;
 228
 229         afbdev->sysram = sysram;
 230         afbdev->size = size;
 231
 232         fb = &afbdev->afb.base;
 233         afbdev->helper.fb = fb;
 234
 235         info->fbops = &astfb_ops;
 236
 237         info->apertures->ranges[0].base = pci_resource_start(dev->pdev, 0);
 238         info->apertures->ranges[0].size = pci_resource_len(dev->pdev, 0);
 239
 240         drm_fb_helper_fill_info(info, &afbdev->helper, sizes);
 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 }