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/fb.h>
  37 #include <linux/init.h>
  38
  39
  40 #include <drm/drmP.h>
  41 #include <drm/drm_crtc.h>
  42 #include <drm/drm_fb_helper.h>
  43 #include "ast_drv.h"
  44
  45 static void ast_dirty_update(struct ast_fbdev *afbdev,
  46                              int x, int y, int width, int height)
  47 {
  48         int i;
  49         struct drm_gem_object *obj;
  50         struct ast_bo *bo;
  51         int src_offset, dst_offset;
  52         int bpp = (afbdev->afb.base.bits_per_pixel + 7)/8;
  53         int ret;
  54         bool unmap = false;
  55
  56         obj = afbdev->afb.obj;
  57         bo = gem_to_ast_bo(obj);
  58
  59         ret = ast_bo_reserve(bo, true);
  60         if (ret) {
  61                 DRM_ERROR("failed to reserve fb bo\n");
  62                 return;
  63         }
  64
  65         if (!bo->kmap.virtual) {
  66                 ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
  67                 if (ret) {
  68                         DRM_ERROR("failed to kmap fb updates\n");
  69                         ast_bo_unreserve(bo);
  70                         return;
  71                 }
  72                 unmap = true;
  73         }
  74         for (i = y; i < y + height; i++) {
  75                 /* assume equal stride for now */
  76                 src_offset = dst_offset = i * afbdev->afb.base.pitches[0] + (x * bpp);
  77                 memcpy_toio(bo->kmap.virtual + src_offset, afbdev->sysram + src_offset, width * bpp);
  78
  79         }
  80         if (unmap)
  81                 ttm_bo_kunmap(&bo->kmap);
  82
  83         ast_bo_unreserve(bo);
  84 }
  85
  86 static void ast_fillrect(struct fb_info *info,
  87                          const struct fb_fillrect *rect)
  88 {
  89         struct ast_fbdev *afbdev = info->par;
  90         sys_fillrect(info, rect);
  91         ast_dirty_update(afbdev, rect->dx, rect->dy, rect->width,
  92                          rect->height);
  93 }
  94
  95 static void ast_copyarea(struct fb_info *info,
  96                          const struct fb_copyarea *area)
  97 {
  98         struct ast_fbdev *afbdev = info->par;
  99         sys_copyarea(info, area);
 100         ast_dirty_update(afbdev, area->dx, area->dy, area->width,
 101                          area->height);
 102 }
 103
 104 static void ast_imageblit(struct fb_info *info,
 105                           const struct fb_image *image)
 106 {
 107         struct ast_fbdev *afbdev = info->par;
 108         sys_imageblit(info, image);
 109         ast_dirty_update(afbdev, image->dx, image->dy, image->width,
 110                          image->height);
 111 }
 112
 113 static struct fb_ops astfb_ops = {
 114         .owner = THIS_MODULE,
 115         .fb_check_var = drm_fb_helper_check_var,
 116         .fb_set_par = drm_fb_helper_set_par,
 117         .fb_fillrect = ast_fillrect,
 118         .fb_copyarea = ast_copyarea,
 119         .fb_imageblit = ast_imageblit,
 120         .fb_pan_display = drm_fb_helper_pan_display,
 121         .fb_blank = drm_fb_helper_blank,
 122         .fb_setcmap = drm_fb_helper_setcmap,
 123         .fb_debug_enter = drm_fb_helper_debug_enter,
 124         .fb_debug_leave = drm_fb_helper_debug_leave,
 125 };
 126
 127 static int astfb_create_object(struct ast_fbdev *afbdev,
 128                                struct drm_mode_fb_cmd2 *mode_cmd,
 129                                struct drm_gem_object **gobj_p)
 130 {
 131         struct drm_device *dev = afbdev->helper.dev;
 132         u32 bpp, depth;
 133         u32 size;
 134         struct drm_gem_object *gobj;
 135
 136         int ret = 0;
 137         drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
 138
 139         size = mode_cmd->pitches[0] * mode_cmd->height;
 140         ret = ast_gem_create(dev, size, true, &gobj);
 141         if (ret)
 142                 return ret;
 143
 144         *gobj_p = gobj;
 145         return ret;
 146 }
 147
 148 static int astfb_create(struct ast_fbdev *afbdev,
 149                         struct drm_fb_helper_surface_size *sizes)
 150 {
 151         struct drm_device *dev = afbdev->helper.dev;
 152         struct drm_mode_fb_cmd2 mode_cmd;
 153         struct drm_framebuffer *fb;
 154         struct fb_info *info;
 155         int size, ret;
 156         struct device *device = &dev->pdev->dev;
 157         void *sysram;
 158         struct drm_gem_object *gobj = NULL;
 159         struct ast_bo *bo = NULL;
 160         mode_cmd.width = sizes->surface_width;
 161         mode_cmd.height = sizes->surface_height;
 162         mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7)/8);
 163
 164         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 165                                                           sizes->surface_depth);
 166
 167         size = mode_cmd.pitches[0] * mode_cmd.height;
 168
 169         ret = astfb_create_object(afbdev, &mode_cmd, &gobj);
 170         if (ret) {
 171                 DRM_ERROR("failed to create fbcon backing object %d\n", ret);
 172                 return ret;
 173         }
 174         bo = gem_to_ast_bo(gobj);
 175
 176         sysram = vmalloc(size);
 177         if (!sysram)
 178                 return -ENOMEM;
 179
 180         info = framebuffer_alloc(0, device);
 181         if (!info) {
 182                 ret = -ENOMEM;
 183                 goto out;
 184         }
 185         info->par = afbdev;
 186
 187         ret = ast_framebuffer_init(dev, &afbdev->afb, &mode_cmd, gobj);
 188         if (ret)
 189                 goto out;
 190
 191         afbdev->sysram = sysram;
 192         afbdev->size = size;
 193
 194         fb = &afbdev->afb.base;
 195         afbdev->helper.fb = fb;
 196         afbdev->helper.fbdev = info;
 197
 198         strcpy(info->fix.id, "astdrmfb");
 199
 200         info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
 201         info->fbops = &astfb_ops;
 202
 203         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 204         if (ret) {
 205                 ret = -ENOMEM;
 206                 goto out;
 207         }
 208
 209         info->apertures = alloc_apertures(1);
 210         if (!info->apertures) {
 211                 ret = -ENOMEM;
 212                 goto out;
 213         }
 214         info->apertures->ranges[0].base = pci_resource_start(dev->pdev, 0);
 215         info->apertures->ranges[0].size = pci_resource_len(dev->pdev, 0);
 216
 217         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 218         drm_fb_helper_fill_var(info, &afbdev->helper, sizes->fb_width, sizes->fb_height);
 219
 220         info->screen_base = sysram;
 221         info->screen_size = size;
 222
 223         info->pixmap.flags = FB_PIXMAP_SYSTEM;
 224
 225         DRM_DEBUG_KMS("allocated %dx%d\n",
 226                       fb->width, fb->height);
 227
 228         return 0;
 229 out:
 230         return ret;
 231 }
 232
 233 static void ast_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
 234                                u16 blue, int regno)
 235 {
 236         struct ast_crtc *ast_crtc = to_ast_crtc(crtc);
 237         ast_crtc->lut_r[regno] = red >> 8;
 238         ast_crtc->lut_g[regno] = green >> 8;
 239         ast_crtc->lut_b[regno] = blue >> 8;
 240 }
 241
 242 static void ast_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
 243                                u16 *blue, int regno)
 244 {
 245         struct ast_crtc *ast_crtc = to_ast_crtc(crtc);
 246         *red = ast_crtc->lut_r[regno] << 8;
 247         *green = ast_crtc->lut_g[regno] << 8;
 248         *blue = ast_crtc->lut_b[regno] << 8;
 249 }
 250
 251 static int ast_find_or_create_single(struct drm_fb_helper *helper,
 252                                           struct drm_fb_helper_surface_size *sizes)
 253 {
 254         struct ast_fbdev *afbdev = (struct ast_fbdev *)helper;
 255         int new_fb = 0;
 256         int ret;
 257
 258         if (!helper->fb) {
 259                 ret = astfb_create(afbdev, sizes);
 260                 if (ret)
 261                         return ret;
 262                 new_fb = 1;
 263         }
 264         return new_fb;
 265 }
 266
 267 static struct drm_fb_helper_funcs ast_fb_helper_funcs = {
 268         .gamma_set = ast_fb_gamma_set,
 269         .gamma_get = ast_fb_gamma_get,
 270         .fb_probe = ast_find_or_create_single,
 271 };
 272
 273 static void ast_fbdev_destroy(struct drm_device *dev,
 274                               struct ast_fbdev *afbdev)
 275 {
 276         struct fb_info *info;
 277         struct ast_framebuffer *afb = &afbdev->afb;
 278         if (afbdev->helper.fbdev) {
 279                 info = afbdev->helper.fbdev;
 280                 unregister_framebuffer(info);
 281                 if (info->cmap.len)
 282                         fb_dealloc_cmap(&info->cmap);
 283                 framebuffer_release(info);
 284         }
 285
 286         if (afb->obj) {
 287                 drm_gem_object_unreference_unlocked(afb->obj);
 288                 afb->obj = NULL;
 289         }
 290         drm_fb_helper_fini(&afbdev->helper);
 291
 292         vfree(afbdev->sysram);
 293         drm_framebuffer_unregister_private(&afb->base);
 294         drm_framebuffer_cleanup(&afb->base);
 295 }
 296
 297 int ast_fbdev_init(struct drm_device *dev)
 298 {
 299         struct ast_private *ast = dev->dev_private;
 300         struct ast_fbdev *afbdev;
 301         int ret;
 302
 303         afbdev = kzalloc(sizeof(struct ast_fbdev), GFP_KERNEL);
 304         if (!afbdev)
 305                 return -ENOMEM;
 306
 307         ast->fbdev = afbdev;
 308         afbdev->helper.funcs = &ast_fb_helper_funcs;
 309         ret = drm_fb_helper_init(dev, &afbdev->helper,
 310                                  1, 1);
 311         if (ret) {
 312                 kfree(afbdev);
 313                 return ret;
 314         }
 315
 316         drm_fb_helper_single_add_all_connectors(&afbdev->helper);
 317         drm_fb_helper_initial_config(&afbdev->helper, 32);
 318         return 0;
 319 }
 320
 321 void ast_fbdev_fini(struct drm_device *dev)
 322 {
 323         struct ast_private *ast = dev->dev_private;
 324
 325         if (!ast->fbdev)
 326                 return;
 327
 328         ast_fbdev_destroy(dev, ast->fbdev);
 329         kfree(ast->fbdev);
 330         ast->fbdev = NULL;
 331 }
 332
 333 void ast_fbdev_set_suspend(struct drm_device *dev, int state)
 334 {
 335         struct ast_private *ast = dev->dev_private;
 336
 337         if (!ast->fbdev)
 338                 return;
 339
 340         fb_set_suspend(ast->fbdev->helper.fbdev, state);
 341 }