drivers/staging/omapdrm/omap_fb.c

   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  * framebuffer funcs
  27  */
  28
  29 /* per-format info: */
  30 struct format {
  31         enum omap_color_mode dss_format;
  32         uint32_t pixel_format;
  33         struct {
  34                 int stride_bpp;           /* this times width is stride */
  35                 int sub_y;                /* sub-sample in y dimension */
  36         } planes[4];
  37         bool yuv;
  38 };
  39
  40 static const struct format formats[] = {
  41         /* 16bpp [A]RGB: */
  42         { OMAP_DSS_COLOR_RGB16,       DRM_FORMAT_RGB565,   {{2, 1}}, false }, /* RGB16-565 */
  43         { OMAP_DSS_COLOR_RGB12U,      DRM_FORMAT_RGBX4444, {{2, 1}}, false }, /* RGB12x-4444 */
  44         { OMAP_DSS_COLOR_RGBX16,      DRM_FORMAT_XRGB4444, {{2, 1}}, false }, /* xRGB12-4444 */
  45         { OMAP_DSS_COLOR_RGBA16,      DRM_FORMAT_RGBA4444, {{2, 1}}, false }, /* RGBA12-4444 */
  46         { OMAP_DSS_COLOR_ARGB16,      DRM_FORMAT_ARGB4444, {{2, 1}}, false }, /* ARGB16-4444 */
  47         { OMAP_DSS_COLOR_XRGB16_1555, DRM_FORMAT_XRGB1555, {{2, 1}}, false }, /* xRGB15-1555 */
  48         { OMAP_DSS_COLOR_ARGB16_1555, DRM_FORMAT_ARGB1555, {{2, 1}}, false }, /* ARGB16-1555 */
  49         /* 24bpp RGB: */
  50         { OMAP_DSS_COLOR_RGB24P,      DRM_FORMAT_RGB888,   {{3, 1}}, false }, /* RGB24-888 */
  51         /* 32bpp [A]RGB: */
  52         { OMAP_DSS_COLOR_RGBX32,      DRM_FORMAT_RGBX8888, {{4, 1}}, false }, /* RGBx24-8888 */
  53         { OMAP_DSS_COLOR_RGB24U,      DRM_FORMAT_XRGB8888, {{4, 1}}, false }, /* xRGB24-8888 */
  54         { OMAP_DSS_COLOR_RGBA32,      DRM_FORMAT_RGBA8888, {{4, 1}}, false }, /* RGBA32-8888 */
  55         { OMAP_DSS_COLOR_ARGB32,      DRM_FORMAT_ARGB8888, {{4, 1}}, false }, /* ARGB32-8888 */
  56         /* YUV: */
  57         { OMAP_DSS_COLOR_NV12,        DRM_FORMAT_NV12,     {{1, 1}, {1, 2}}, true },
  58         { OMAP_DSS_COLOR_YUV2,        DRM_FORMAT_YUYV,     {{2, 1}}, true },
  59         { OMAP_DSS_COLOR_UYVY,        DRM_FORMAT_UYVY,     {{2, 1}}, true },
  60 };
  61
  62 /* per-plane info for the fb: */
  63 struct plane {
  64         struct drm_gem_object *bo;
  65         uint32_t pitch;
  66         uint32_t offset;
  67         dma_addr_t paddr;
  68 };
  69
  70 #define to_omap_framebuffer(x) container_of(x, struct omap_framebuffer, base)
  71
  72 struct omap_framebuffer {
  73         struct drm_framebuffer base;
  74         const struct format *format;
  75         struct plane planes[4];
  76 };
  77
  78 static int omap_framebuffer_create_handle(struct drm_framebuffer *fb,
  79                 struct drm_file *file_priv,
  80                 unsigned int *handle)
  81 {
  82         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
  83         return drm_gem_handle_create(file_priv,
  84                         omap_fb->planes[0].bo, handle);
  85 }
  86
  87 static void omap_framebuffer_destroy(struct drm_framebuffer *fb)
  88 {
  89         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
  90         int i, n = drm_format_num_planes(omap_fb->format->pixel_format);
  91
  92         DBG("destroy: FB ID: %d (%p)", fb->base.id, fb);
  93
  94         drm_framebuffer_cleanup(fb);
  95
  96         for (i = 0; i < n; i++) {
  97                 struct plane *plane = &omap_fb->planes[i];
  98                 if (plane->bo)
  99                         drm_gem_object_unreference_unlocked(plane->bo);
 100         }
 101
 102         kfree(omap_fb);
 103 }
 104
 105 static int omap_framebuffer_dirty(struct drm_framebuffer *fb,
 106                 struct drm_file *file_priv, unsigned flags, unsigned color,
 107                 struct drm_clip_rect *clips, unsigned num_clips)
 108 {
 109         int i;
 110
 111         for (i = 0; i < num_clips; i++) {
 112                 omap_framebuffer_flush(fb, clips[i].x1, clips[i].y1,
 113                                         clips[i].x2 - clips[i].x1,
 114                                         clips[i].y2 - clips[i].y1);
 115         }
 116
 117         return 0;
 118 }
 119
 120 static const struct drm_framebuffer_funcs omap_framebuffer_funcs = {
 121         .create_handle = omap_framebuffer_create_handle,
 122         .destroy = omap_framebuffer_destroy,
 123         .dirty = omap_framebuffer_dirty,
 124 };
 125
 126 /* pins buffer in preparation for scanout */
 127 int omap_framebuffer_pin(struct drm_framebuffer *fb)
 128 {
 129         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 130         int ret, i, n = drm_format_num_planes(omap_fb->format->pixel_format);
 131
 132         for (i = 0; i < n; i++) {
 133                 struct plane *plane = &omap_fb->planes[i];
 134                 ret = omap_gem_get_paddr(plane->bo, &plane->paddr, true);
 135                 if (ret)
 136                         goto fail;
 137         }
 138
 139         return 0;
 140
 141 fail:
 142         while (--i > 0) {
 143                 struct plane *plane = &omap_fb->planes[i];
 144                 omap_gem_put_paddr(plane->bo);
 145         }
 146         return ret;
 147 }
 148
 149 /* releases buffer when done with scanout */
 150 void omap_framebuffer_unpin(struct drm_framebuffer *fb)
 151 {
 152         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 153         int i, n = drm_format_num_planes(omap_fb->format->pixel_format);
 154
 155         for (i = 0; i < n; i++) {
 156                 struct plane *plane = &omap_fb->planes[i];
 157                 omap_gem_put_paddr(plane->bo);
 158         }
 159 }
 160
 161 /* update ovl info for scanout, handles cases of multi-planar fb's, etc.
 162  */
 163 void omap_framebuffer_update_scanout(struct drm_framebuffer *fb, int x, int y,
 164                 struct omap_overlay_info *info)
 165 {
 166         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 167         const struct format *format = omap_fb->format;
 168         struct plane *plane = &omap_fb->planes[0];
 169         unsigned int offset;
 170
 171         offset = plane->offset +
 172                         (x * format->planes[0].stride_bpp) +
 173                         (y * plane->pitch / format->planes[0].sub_y);
 174
 175         info->color_mode   = format->dss_format;
 176         info->paddr        = plane->paddr + offset;
 177         info->screen_width = plane->pitch / format->planes[0].stride_bpp;
 178
 179         if (format->dss_format == OMAP_DSS_COLOR_NV12) {
 180                 plane = &omap_fb->planes[1];
 181                 offset = plane->offset +
 182                                 (x * format->planes[1].stride_bpp) +
 183                                 (y * plane->pitch / format->planes[1].sub_y);
 184                 info->p_uv_addr = plane->paddr + offset;
 185         } else {
 186                 info->p_uv_addr = 0;
 187         }
 188 }
 189
 190 struct drm_gem_object *omap_framebuffer_bo(struct drm_framebuffer *fb, int p)
 191 {
 192         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 193         if (p >= drm_format_num_planes(omap_fb->format->pixel_format))
 194                 return NULL;
 195         return omap_fb->planes[p].bo;
 196 }
 197
 198 /* iterate thru all the connectors, returning ones that are attached
 199  * to the same fb..
 200  */
 201 struct drm_connector *omap_framebuffer_get_next_connector(
 202                 struct drm_framebuffer *fb, struct drm_connector *from)
 203 {
 204         struct drm_device *dev = fb->dev;
 205         struct list_head *connector_list = &dev->mode_config.connector_list;
 206         struct drm_connector *connector = from;
 207
 208         if (!from) {
 209                 return list_first_entry(connector_list, typeof(*from), head);
 210         }
 211
 212         list_for_each_entry_from(connector, connector_list, head) {
 213                 if (connector != from) {
 214                         struct drm_encoder *encoder = connector->encoder;
 215                         struct drm_crtc *crtc = encoder ? encoder->crtc : NULL;
 216                         if (crtc && crtc->fb == fb) {
 217                                 return connector;
 218                         }
 219                 }
 220         }
 221
 222         return NULL;
 223 }
 224
 225 /* flush an area of the framebuffer (in case of manual update display that
 226  * is not automatically flushed)
 227  */
 228 void omap_framebuffer_flush(struct drm_framebuffer *fb,
 229                 int x, int y, int w, int h)
 230 {
 231         struct drm_connector *connector = NULL;
 232
 233         VERB("flush: %d,%d %dx%d, fb=%p", x, y, w, h, fb);
 234
 235         while ((connector = omap_framebuffer_get_next_connector(fb, connector))) {
 236                 /* only consider connectors that are part of a chain */
 237                 if (connector->encoder && connector->encoder->crtc) {
 238                         /* TODO: maybe this should propagate thru the crtc who
 239                          * could do the coordinate translation..
 240                          */
 241                         struct drm_crtc *crtc = connector->encoder->crtc;
 242                         int cx = max(0, x - crtc->x);
 243                         int cy = max(0, y - crtc->y);
 244                         int cw = w + (x - crtc->x) - cx;
 245                         int ch = h + (y - crtc->y) - cy;
 246
 247                         omap_connector_flush(connector, cx, cy, cw, ch);
 248                 }
 249         }
 250 }
 251
 252 struct drm_framebuffer *omap_framebuffer_create(struct drm_device *dev,
 253                 struct drm_file *file, struct drm_mode_fb_cmd2 *mode_cmd)
 254 {
 255         struct drm_gem_object *bos[4];
 256         struct drm_framebuffer *fb;
 257         int ret;
 258
 259         ret = objects_lookup(dev, file, mode_cmd->pixel_format,
 260                         bos, mode_cmd->handles);
 261         if (ret)
 262                 return ERR_PTR(ret);
 263
 264         fb = omap_framebuffer_init(dev, mode_cmd, bos);
 265         if (IS_ERR(fb)) {
 266                 int i, n = drm_format_num_planes(mode_cmd->pixel_format);
 267                 for (i = 0; i < n; i++)
 268                         drm_gem_object_unreference_unlocked(bos[i]);
 269                 return fb;
 270         }
 271         return fb;
 272 }
 273
 274 struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev,
 275                 struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos)
 276 {
 277         struct omap_framebuffer *omap_fb;
 278         struct drm_framebuffer *fb = NULL;
 279         const struct format *format = NULL;
 280         int ret, i, n = drm_format_num_planes(mode_cmd->pixel_format);
 281
 282         DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)",
 283                         dev, mode_cmd, mode_cmd->width, mode_cmd->height,
 284                         (char *)&mode_cmd->pixel_format);
 285
 286         for (i = 0; i < ARRAY_SIZE(formats); i++) {
 287                 if (formats[i].pixel_format == mode_cmd->pixel_format) {
 288                         format = &formats[i];
 289                         break;
 290                 }
 291         }
 292
 293         if (!format) {
 294                 dev_err(dev->dev, "unsupported pixel format: %4.4s\n",
 295                                 (char *)&mode_cmd->pixel_format);
 296                 ret = -EINVAL;
 297                 goto fail;
 298         }
 299
 300         omap_fb = kzalloc(sizeof(*omap_fb), GFP_KERNEL);
 301         if (!omap_fb) {
 302                 dev_err(dev->dev, "could not allocate fb\n");
 303                 ret = -ENOMEM;
 304                 goto fail;
 305         }
 306
 307         fb = &omap_fb->base;
 308         ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs);
 309         if (ret) {
 310                 dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
 311                 goto fail;
 312         }
 313
 314         DBG("create: FB ID: %d (%p)", fb->base.id, fb);
 315
 316         omap_fb->format = format;
 317
 318         for (i = 0; i < n; i++) {
 319                 struct plane *plane = &omap_fb->planes[i];
 320                 int size, pitch = mode_cmd->pitches[i];
 321
 322                 if (pitch < (mode_cmd->width * format->planes[i].stride_bpp)) {
 323                         dev_err(dev->dev, "provided buffer pitch is too small! %d < %d\n",
 324                                         pitch, mode_cmd->width * format->planes[i].stride_bpp);
 325                         ret = -EINVAL;
 326                         goto fail;
 327                 }
 328
 329                 size = pitch * mode_cmd->height / format->planes[i].sub_y;
 330
 331                 if (size > (bos[i]->size - mode_cmd->offsets[i])) {
 332                         dev_err(dev->dev, "provided buffer object is too small! %d < %d\n",
 333                                         bos[i]->size - mode_cmd->offsets[i], size);
 334                         ret = -EINVAL;
 335                         goto fail;
 336                 }
 337
 338                 plane->bo     = bos[i];
 339                 plane->offset = mode_cmd->offsets[i];
 340                 plane->pitch  = mode_cmd->pitches[i];
 341                 plane->paddr  = pitch;
 342         }
 343
 344         drm_helper_mode_fill_fb_struct(fb, mode_cmd);
 345
 346         return fb;
 347
 348 fail:
 349         if (fb) {
 350                 omap_framebuffer_destroy(fb);
 351         }
 352         return ERR_PTR(ret);
 353 }