Rob Clark | cd5351f | 2011-11-12 12:09:40 -0600 | [diff] [blame] | 1 | /* |
| 2 | * drivers/staging/omapdrm/omap_fb.c |
| 3 | * |
| 4 | * Copyright (C) 2011 Texas Instruments |
| 5 | * Author: Rob Clark <rob@ti.com> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify it |
| 8 | * under the terms of the GNU General Public License version 2 as published by |
| 9 | * the Free Software Foundation. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 14 | * more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License along with |
| 17 | * this program. If not, see <http://www.gnu.org/licenses/>. |
| 18 | */ |
| 19 | |
| 20 | #include "omap_drv.h" |
| 21 | |
| 22 | #include "drm_crtc.h" |
| 23 | #include "drm_crtc_helper.h" |
| 24 | |
| 25 | |
| 26 | /* |
| 27 | * framebuffer funcs |
| 28 | */ |
| 29 | |
| 30 | #define to_omap_framebuffer(x) container_of(x, struct omap_framebuffer, base) |
| 31 | |
| 32 | struct omap_framebuffer { |
| 33 | struct drm_framebuffer base; |
| 34 | struct drm_gem_object *bo; |
| 35 | int size; |
| 36 | dma_addr_t paddr; |
| 37 | }; |
| 38 | |
| 39 | static int omap_framebuffer_create_handle(struct drm_framebuffer *fb, |
| 40 | struct drm_file *file_priv, |
| 41 | unsigned int *handle) |
| 42 | { |
| 43 | struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); |
| 44 | return drm_gem_handle_create(file_priv, omap_fb->bo, handle); |
| 45 | } |
| 46 | |
| 47 | static void omap_framebuffer_destroy(struct drm_framebuffer *fb) |
| 48 | { |
| 49 | struct drm_device *dev = fb->dev; |
| 50 | struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); |
| 51 | |
| 52 | DBG("destroy: FB ID: %d (%p)", fb->base.id, fb); |
| 53 | |
| 54 | drm_framebuffer_cleanup(fb); |
| 55 | |
Rob Clark | cd5351f | 2011-11-12 12:09:40 -0600 | [diff] [blame] | 56 | if (omap_fb->bo) { |
Rob Clark | 65b0bd0 | 2011-12-09 23:26:07 -0600 | [diff] [blame] | 57 | if (omap_fb->paddr && omap_gem_put_paddr(omap_fb->bo)) |
| 58 | dev_err(dev->dev, "could not unmap!\n"); |
Rob Clark | cd5351f | 2011-11-12 12:09:40 -0600 | [diff] [blame] | 59 | drm_gem_object_unreference_unlocked(omap_fb->bo); |
| 60 | } |
| 61 | |
| 62 | kfree(omap_fb); |
| 63 | } |
| 64 | |
| 65 | static int omap_framebuffer_dirty(struct drm_framebuffer *fb, |
| 66 | struct drm_file *file_priv, unsigned flags, unsigned color, |
| 67 | struct drm_clip_rect *clips, unsigned num_clips) |
| 68 | { |
| 69 | int i; |
| 70 | |
| 71 | for (i = 0; i < num_clips; i++) { |
| 72 | omap_framebuffer_flush(fb, clips[i].x1, clips[i].y1, |
| 73 | clips[i].x2 - clips[i].x1, |
| 74 | clips[i].y2 - clips[i].y1); |
| 75 | } |
| 76 | |
| 77 | return 0; |
| 78 | } |
| 79 | |
| 80 | static const struct drm_framebuffer_funcs omap_framebuffer_funcs = { |
| 81 | .create_handle = omap_framebuffer_create_handle, |
| 82 | .destroy = omap_framebuffer_destroy, |
| 83 | .dirty = omap_framebuffer_dirty, |
| 84 | }; |
| 85 | |
| 86 | /* returns the buffer size */ |
| 87 | int omap_framebuffer_get_buffer(struct drm_framebuffer *fb, int x, int y, |
| 88 | void **vaddr, dma_addr_t *paddr, unsigned int *screen_width) |
| 89 | { |
| 90 | struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); |
| 91 | int bpp = fb->bits_per_pixel / 8; |
| 92 | unsigned long offset; |
| 93 | |
| 94 | offset = (x * bpp) + (y * fb->pitch); |
| 95 | |
| 96 | if (vaddr) { |
| 97 | void *bo_vaddr = omap_gem_vaddr(omap_fb->bo); |
| 98 | /* note: we can only count on having a vaddr for buffers that |
| 99 | * are allocated physically contiguously to begin with (ie. |
| 100 | * dma_alloc_coherent()). But this should be ok because it |
| 101 | * is only used by legacy fbdev |
| 102 | */ |
Rob Clark | f7f9f45 | 2011-12-05 19:19:22 -0600 | [diff] [blame] | 103 | BUG_ON(IS_ERR_OR_NULL(bo_vaddr)); |
Rob Clark | cd5351f | 2011-11-12 12:09:40 -0600 | [diff] [blame] | 104 | *vaddr = bo_vaddr + offset; |
| 105 | } |
| 106 | |
| 107 | *paddr = omap_fb->paddr + offset; |
| 108 | *screen_width = fb->pitch / bpp; |
| 109 | |
| 110 | return omap_fb->size - offset; |
| 111 | } |
| 112 | |
| 113 | struct drm_gem_object *omap_framebuffer_bo(struct drm_framebuffer *fb) |
| 114 | { |
| 115 | struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); |
| 116 | return omap_fb->bo; |
| 117 | } |
| 118 | |
| 119 | /* iterate thru all the connectors, returning ones that are attached |
| 120 | * to the same fb.. |
| 121 | */ |
| 122 | struct drm_connector *omap_framebuffer_get_next_connector( |
| 123 | struct drm_framebuffer *fb, struct drm_connector *from) |
| 124 | { |
| 125 | struct drm_device *dev = fb->dev; |
| 126 | struct list_head *connector_list = &dev->mode_config.connector_list; |
| 127 | struct drm_connector *connector = from; |
| 128 | |
| 129 | if (!from) { |
| 130 | return list_first_entry(connector_list, typeof(*from), head); |
| 131 | } |
| 132 | |
| 133 | list_for_each_entry_from(connector, connector_list, head) { |
| 134 | if (connector != from) { |
| 135 | struct drm_encoder *encoder = connector->encoder; |
| 136 | struct drm_crtc *crtc = encoder ? encoder->crtc : NULL; |
| 137 | if (crtc && crtc->fb == fb) { |
| 138 | return connector; |
| 139 | } |
| 140 | } |
| 141 | } |
| 142 | |
| 143 | return NULL; |
| 144 | } |
| 145 | |
| 146 | /* flush an area of the framebuffer (in case of manual update display that |
| 147 | * is not automatically flushed) |
| 148 | */ |
| 149 | void omap_framebuffer_flush(struct drm_framebuffer *fb, |
| 150 | int x, int y, int w, int h) |
| 151 | { |
| 152 | struct drm_connector *connector = NULL; |
| 153 | |
| 154 | VERB("flush: %d,%d %dx%d, fb=%p", x, y, w, h, fb); |
| 155 | |
| 156 | while ((connector = omap_framebuffer_get_next_connector(fb, connector))) { |
| 157 | /* only consider connectors that are part of a chain */ |
| 158 | if (connector->encoder && connector->encoder->crtc) { |
| 159 | /* TODO: maybe this should propagate thru the crtc who |
| 160 | * could do the coordinate translation.. |
| 161 | */ |
| 162 | struct drm_crtc *crtc = connector->encoder->crtc; |
| 163 | int cx = max(0, x - crtc->x); |
| 164 | int cy = max(0, y - crtc->y); |
| 165 | int cw = w + (x - crtc->x) - cx; |
| 166 | int ch = h + (y - crtc->y) - cy; |
| 167 | |
| 168 | omap_connector_flush(connector, cx, cy, cw, ch); |
| 169 | } |
| 170 | } |
| 171 | } |
| 172 | |
| 173 | struct drm_framebuffer *omap_framebuffer_create(struct drm_device *dev, |
| 174 | struct drm_file *file, struct drm_mode_fb_cmd *mode_cmd) |
| 175 | { |
| 176 | struct drm_gem_object *bo; |
| 177 | struct drm_framebuffer *fb; |
| 178 | bo = drm_gem_object_lookup(dev, file, mode_cmd->handle); |
| 179 | if (!bo) { |
| 180 | return ERR_PTR(-ENOENT); |
| 181 | } |
| 182 | fb = omap_framebuffer_init(dev, mode_cmd, bo); |
| 183 | if (!fb) { |
| 184 | return ERR_PTR(-ENOMEM); |
| 185 | } |
| 186 | return fb; |
| 187 | } |
| 188 | |
| 189 | struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev, |
| 190 | struct drm_mode_fb_cmd *mode_cmd, struct drm_gem_object *bo) |
| 191 | { |
| 192 | struct omap_framebuffer *omap_fb; |
| 193 | struct drm_framebuffer *fb = NULL; |
| 194 | int size, ret; |
| 195 | |
| 196 | DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%d)", |
| 197 | dev, mode_cmd, mode_cmd->width, mode_cmd->height, |
| 198 | mode_cmd->bpp); |
| 199 | |
| 200 | /* in case someone tries to feed us a completely bogus stride: */ |
| 201 | mode_cmd->pitch = align_pitch(mode_cmd->pitch, |
| 202 | mode_cmd->width, mode_cmd->bpp); |
| 203 | |
| 204 | omap_fb = kzalloc(sizeof(*omap_fb), GFP_KERNEL); |
| 205 | if (!omap_fb) { |
| 206 | dev_err(dev->dev, "could not allocate fb\n"); |
| 207 | goto fail; |
| 208 | } |
| 209 | |
| 210 | fb = &omap_fb->base; |
| 211 | ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs); |
| 212 | if (ret) { |
| 213 | dev_err(dev->dev, "framebuffer init failed: %d\n", ret); |
| 214 | goto fail; |
| 215 | } |
| 216 | |
| 217 | DBG("create: FB ID: %d (%p)", fb->base.id, fb); |
| 218 | |
| 219 | size = PAGE_ALIGN(mode_cmd->pitch * mode_cmd->height); |
| 220 | |
Rob Clark | a6a9182 | 2011-12-09 23:26:08 -0600 | [diff] [blame] | 221 | if (size > bo->size) { |
| 222 | dev_err(dev->dev, "provided buffer object is too small!\n"); |
| 223 | goto fail; |
Rob Clark | cd5351f | 2011-11-12 12:09:40 -0600 | [diff] [blame] | 224 | } |
| 225 | |
| 226 | omap_fb->bo = bo; |
| 227 | omap_fb->size = size; |
| 228 | |
| 229 | if (omap_gem_get_paddr(bo, &omap_fb->paddr, true)) { |
| 230 | dev_err(dev->dev, "could not map (paddr)!\n"); |
| 231 | goto fail; |
| 232 | } |
| 233 | |
| 234 | drm_helper_mode_fill_fb_struct(fb, mode_cmd); |
| 235 | |
| 236 | return fb; |
| 237 | |
| 238 | fail: |
| 239 | if (fb) { |
| 240 | omap_framebuffer_destroy(fb); |
| 241 | } |
| 242 | return NULL; |
| 243 | } |