LXR linux/drivers/gpu/drm/ast/ast

   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 <drm/drm_crtc_helper.h>
  44#include "ast_drv.h"
  45
  46static void ast_dirty_update(struct ast_fbdev *afbdev,
  47                             int x, int y, int width, int height)
  48{
  49        int i;
  50        struct drm_gem_object *obj;
  51        struct ast_bo *bo;
  52        int src_offset, dst_offset;
  53        int bpp = (afbdev->afb.base.bits_per_pixel + 7)/8;
  54        int ret = -EBUSY;
  55        bool unmap = false;
  56        bool store_for_later = false;
  57        int x2, y2;
  58        unsigned long flags;
  59
  60        obj = afbdev->afb.obj;
  61        bo = gem_to_ast_bo(obj);
  62
  63        /*
  64         * try and reserve the BO, if we fail with busy
  65         * then the BO is being moved and we should
  66         * store up the damage until later.
  67         */
  68        if (drm_can_sleep())
  69                ret = ast_bo_reserve(bo, true);
  70        if (ret) {
  71                if (ret != -EBUSY)
  72                        return;
  73
  74                store_for_later = true;
  75        }
  76
  77        x2 = x + width - 1;
  78        y2 = y + height - 1;
  79        spin_lock_irqsave(&afbdev->dirty_lock, flags);
  80
  81        if (afbdev->y1 < y)
  82                y = afbdev->y1;
  83        if (afbdev->y2 > y2)
  84                y2 = afbdev->y2;
  85        if (afbdev->x1 < x)
  86                x = afbdev->x1;
  87        if (afbdev->x2 > x2)
  88                x2 = afbdev->x2;
  89
  90        if (store_for_later) {
  91                afbdev->x1 = x;
  92                afbdev->x2 = x2;
  93                afbdev->y1 = y;
  94                afbdev->y2 = y2;
  95                spin_unlock_irqrestore(&afbdev->dirty_lock, flags);
  96                return;
  97        }
  98
  99        afbdev->x1 = afbdev->y1 = INT_MAX;
 100        afbdev->x2 = afbdev->y2 = 0;
 101        spin_unlock_irqrestore(&afbdev->dirty_lock, flags);
 102
 103        if (!bo->kmap.virtual) {
 104                ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
 105                if (ret) {
 106                        DRM_ERROR("failed to kmap fb updates\n");
 107                        ast_bo_unreserve(bo);
 108                        return;
 109                }
 110                unmap = true;
 111        }
 112        for (i = y; i <= y2; i++) {
 113                /* assume equal stride for now */
 114                src_offset = dst_offset = i * afbdev->afb.base.pitches[0] + (x * bpp);
 115                memcpy_toio(bo->kmap.virtual + src_offset, afbdev->sysram + src_offset, (x2 - x + 1) * bpp);
 116
 117        }
 118        if (unmap)
 119                ttm_bo_kunmap(&bo->kmap);
 120
 121        ast_bo_unreserve(bo);
 122}
 123
 124static void ast_fillrect(struct fb_info *info,
 125                         const struct fb_fillrect *rect)
 126{
 127        struct ast_fbdev *afbdev = info->par;
 128        drm_fb_helper_sys_fillrect(info, rect);
 129        ast_dirty_update(afbdev, rect->dx, rect->dy, rect->width,
 130                         rect->height);
 131}
 132
 133static void ast_copyarea(struct fb_info *info,
 134                         const struct fb_copyarea *area)
 135{
 136        struct ast_fbdev *afbdev = info->par;
 137        drm_fb_helper_sys_copyarea(info, area);
 138        ast_dirty_update(afbdev, area->dx, area->dy, area->width,
 139                         area->height);
 140}
 141
 142static void ast_imageblit(struct fb_info *info,
 143                          const struct fb_image *image)
 144{
 145        struct ast_fbdev *afbdev = info->par;
 146        drm_fb_helper_sys_imageblit(info, image);
 147        ast_dirty_update(afbdev, image->dx, image->dy, image->width,
 148                         image->height);
 149}
 150
 151static struct fb_ops astfb_ops = {
 152        .owner = THIS_MODULE,
 153        .fb_check_var = drm_fb_helper_check_var,
 154        .fb_set_par = drm_fb_helper_set_par,
 155        .fb_fillrect = ast_fillrect,
 156        .fb_copyarea = ast_copyarea,
 157        .fb_imageblit = ast_imageblit,
 158        .fb_pan_display = drm_fb_helper_pan_display,
 159        .fb_blank = drm_fb_helper_blank,
 160        .fb_setcmap = drm_fb_helper_setcmap,
 161        .fb_debug_enter = drm_fb_helper_debug_enter,
 162        .fb_debug_leave = drm_fb_helper_debug_leave,
 163};
 164
 165static int astfb_create_object(struct ast_fbdev *afbdev,
 166                               const struct drm_mode_fb_cmd2 *mode_cmd,
 167                               struct drm_gem_object **gobj_p)
 168{
 169        struct drm_device *dev = afbdev->helper.dev;
 170        u32 bpp, depth;
 171        u32 size;
 172        struct drm_gem_object *gobj;
 173
 174        int ret = 0;
 175        drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
 176
 177        size = mode_cmd->pitches[0] * mode_cmd->height;
 178        ret = ast_gem_create(dev, size, true, &gobj);
 179        if (ret)
 180                return ret;
 181
 182        *gobj_p = gobj;
 183        return ret;
 184}
 185
 186static int astfb_create(struct drm_fb_helper *helper,
 187                        struct drm_fb_helper_surface_size *sizes)
 188{
 189        struct ast_fbdev *afbdev =
 190                container_of(helper, struct ast_fbdev, helper);
 191        struct drm_device *dev = afbdev->helper.dev;
 192        struct drm_mode_fb_cmd2 mode_cmd;
 193        struct drm_framebuffer *fb;
 194        struct fb_info *info;
 195        int size, ret;
 196        void *sysram;
 197        struct drm_gem_object *gobj = NULL;
 198        struct ast_bo *bo = NULL;
 199        mode_cmd.width = sizes->surface_width;
 200        mode_cmd.height = sizes->surface_height;
 201        mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7)/8);
 202
 203        mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 204                                                          sizes->surface_depth);
 205
 206        size = mode_cmd.pitches[0] * mode_cmd.height;
 207
 208        ret = astfb_create_object(afbdev, &mode_cmd, &gobj);
 209        if (ret) {
 210                DRM_ERROR("failed to create fbcon backing object %d\n", ret);
 211                return ret;
 212        }
 213        bo = gem_to_ast_bo(gobj);
 214
 215        sysram = vmalloc(size);
 216        if (!sysram)
 217                return -ENOMEM;
 218
 219        info = drm_fb_helper_alloc_fbi(helper);
 220        if (IS_ERR(info)) {
 221                ret = PTR_ERR(info);
 222                goto err_free_vram;
 223        }
 224        info->par = afbdev;
 225
 226        ret = ast_framebuffer_init(dev, &afbdev->afb, &mode_cmd, gobj);
 227        if (ret)
 228                goto err_release_fbi;
 229
 230        afbdev->sysram = sysram;
 231        afbdev->size = size;
 232
 233        fb = &afbdev->afb.base;
 234        afbdev->helper.fb = fb;
 235
 236        strcpy(info->fix.id, "astdrmfb");
 237
 238        info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
 239        info->fbops = &astfb_ops;
 240
 241        info->apertures->ranges[0].base = pci_resource_start(dev->pdev, 0);
 242        info->apertures->ranges[0].size = pci_resource_len(dev->pdev, 0);
 243
 244        drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 245        drm_fb_helper_fill_var(info, &afbdev->helper, sizes->fb_width, sizes->fb_height);
 246
 247        info->screen_base = sysram;
 248        info->screen_size = size;
 249
 250        info->pixmap.flags = FB_PIXMAP_SYSTEM;
 251
 252        DRM_DEBUG_KMS("allocated %dx%d\n",
 253                      fb->width, fb->height);
 254
 255        return 0;
 256
 257err_release_fbi:
 258        drm_fb_helper_release_fbi(helper);
 259err_free_vram:
 260        vfree(afbdev->sysram);
 261        return ret;
 262}
 263
 264static void ast_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
 265                               u16 blue, int regno)
 266{
 267        struct ast_crtc *ast_crtc = to_ast_crtc(crtc);
 268        ast_crtc->lut_r[regno] = red >> 8;
 269        ast_crtc->lut_g[regno] = green >> 8;
 270        ast_crtc->lut_b[regno] = blue >> 8;
 271}
 272
 273static void ast_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
 274                               u16 *blue, int regno)
 275{
 276        struct ast_crtc *ast_crtc = to_ast_crtc(crtc);
 277        *red = ast_crtc->lut_r[regno] << 8;
 278        *green = ast_crtc->lut_g[regno] << 8;
 279        *blue = ast_crtc->lut_b[regno] << 8;
 280}
 281
 282static const struct drm_fb_helper_funcs ast_fb_helper_funcs = {
 283        .gamma_set = ast_fb_gamma_set,
 284        .gamma_get = ast_fb_gamma_get,
 285        .fb_probe = astfb_create,
 286};
 287
 288static void ast_fbdev_destroy(struct drm_device *dev,
 289                              struct ast_fbdev *afbdev)
 290{
 291        struct ast_framebuffer *afb = &afbdev->afb;
 292
 293        drm_fb_helper_unregister_fbi(&afbdev->helper);
 294        drm_fb_helper_release_fbi(&afbdev->helper);
 295
 296        if (afb->obj) {
 297                drm_gem_object_unreference_unlocked(afb->obj);
 298                afb->obj = NULL;
 299        }
 300        drm_fb_helper_fini(&afbdev->helper);
 301
 302        vfree(afbdev->sysram);
 303        drm_framebuffer_unregister_private(&afb->base);
 304        drm_framebuffer_cleanup(&afb->base);
 305}
 306
 307int ast_fbdev_init(struct drm_device *dev)
 308{
 309        struct ast_private *ast = dev->dev_private;
 310        struct ast_fbdev *afbdev;
 311        int ret;
 312
 313        afbdev = kzalloc(sizeof(struct ast_fbdev), GFP_KERNEL);
 314        if (!afbdev)
 315                return -ENOMEM;
 316
 317        ast->fbdev = afbdev;
 318        spin_lock_init(&afbdev->dirty_lock);
 319
 320        drm_fb_helper_prepare(dev, &afbdev->helper, &ast_fb_helper_funcs);
 321
 322        ret = drm_fb_helper_init(dev, &afbdev->helper,
 323                                 1, 1);
 324        if (ret)
 325                goto free;
 326
 327        ret = drm_fb_helper_single_add_all_connectors(&afbdev->helper);
 328        if (ret)
 329                goto fini;
 330
 331        /* disable all the possible outputs/crtcs before entering KMS mode */
 332        drm_helper_disable_unused_functions(dev);
 333
 334        ret = drm_fb_helper_initial_config(&afbdev->helper, 32);
 335        if (ret)
 336                goto fini;
 337
 338        return 0;
 339
 340fini:
 341        drm_fb_helper_fini(&afbdev->helper);
 342free:
 343        kfree(afbdev);
 344        return ret;
 345}
 346
 347void ast_fbdev_fini(struct drm_device *dev)
 348{
 349        struct ast_private *ast = dev->dev_private;
 350
 351        if (!ast->fbdev)
 352                return;
 353
 354        ast_fbdev_destroy(dev, ast->fbdev);
 355        kfree(ast->fbdev);
 356        ast->fbdev = NULL;
 357}
 358
 359void ast_fbdev_set_suspend(struct drm_device *dev, int state)
 360{
 361        struct ast_private *ast = dev->dev_private;
 362
 363        if (!ast->fbdev)
 364                return;
 365
 366        drm_fb_helper_set_suspend(&ast->fbdev->helper, state);
 367}
 368
 369void ast_fbdev_set_base(struct ast_private *ast, unsigned long gpu_addr)
 370{
 371        ast->fbdev->helper.fbdev->fix.smem_start =
 372                ast->fbdev->helper.fbdev->apertures->ranges[0].base + gpu_addr;
 373        ast->fbdev->helper.fbdev->fix.smem_len = ast->vram_size - gpu_addr;
 374}
 375