drivers/media/platform/omap/omap_vout_vrfb.c

   1 /*
   2  * omap_vout_vrfb.c
   3  *
   4  * Copyright (C) 2010 Texas Instruments.
   5  *
   6  * This file is licensed under the terms of the GNU General Public License
   7  * version 2. This program is licensed "as is" without any warranty of any
   8  * kind, whether express or implied.
   9  *
  10  */
  11
  12 #include <linux/sched.h>
  13 #include <linux/platform_device.h>
  14 #include <linux/videodev2.h>
  15
  16 #include <media/videobuf-dma-contig.h>
  17 #include <media/v4l2-device.h>
  18
  19 #include <linux/omap-dma.h>
  20 #include <video/omapvrfb.h>
  21
  22 #include "omap_voutdef.h"
  23 #include "omap_voutlib.h"
  24
  25 #define OMAP_DMA_NO_DEVICE      0
  26
  27 /*
  28  * Function for allocating video buffers
  29  */
  30 static int omap_vout_allocate_vrfb_buffers(struct omap_vout_device *vout,
  31                 unsigned int *count, int startindex)
  32 {
  33         int i, j;
  34
  35         for (i = 0; i < *count; i++) {
  36                 if (!vout->smsshado_virt_addr[i]) {
  37                         vout->smsshado_virt_addr[i] =
  38                                 omap_vout_alloc_buffer(vout->smsshado_size,
  39                                                 &vout->smsshado_phy_addr[i]);
  40                 }
  41                 if (!vout->smsshado_virt_addr[i] && startindex != -1) {
  42                         if (V4L2_MEMORY_MMAP == vout->memory && i >= startindex)
  43                                 break;
  44                 }
  45                 if (!vout->smsshado_virt_addr[i]) {
  46                         for (j = 0; j < i; j++) {
  47                                 omap_vout_free_buffer(
  48                                                 vout->smsshado_virt_addr[j],
  49                                                 vout->smsshado_size);
  50                                 vout->smsshado_virt_addr[j] = 0;
  51                                 vout->smsshado_phy_addr[j] = 0;
  52                         }
  53                         *count = 0;
  54                         return -ENOMEM;
  55                 }
  56                 memset((void *) vout->smsshado_virt_addr[i], 0,
  57                                 vout->smsshado_size);
  58         }
  59         return 0;
  60 }
  61
  62 /*
  63  * Wakes up the application once the DMA transfer to VRFB space is completed.
  64  */
  65 static void omap_vout_vrfb_dma_tx_callback(int lch, u16 ch_status, void *data)
  66 {
  67         struct vid_vrfb_dma *t = (struct vid_vrfb_dma *) data;
  68
  69         t->tx_status = 1;
  70         wake_up_interruptible(&t->wait);
  71 }
  72
  73 /*
  74  * Free VRFB buffers
  75  */
  76 void omap_vout_free_vrfb_buffers(struct omap_vout_device *vout)
  77 {
  78         int j;
  79
  80         for (j = 0; j < VRFB_NUM_BUFS; j++) {
  81                 omap_vout_free_buffer(vout->smsshado_virt_addr[j],
  82                                 vout->smsshado_size);
  83                 vout->smsshado_virt_addr[j] = 0;
  84                 vout->smsshado_phy_addr[j] = 0;
  85         }
  86 }
  87
  88 int omap_vout_setup_vrfb_bufs(struct platform_device *pdev, int vid_num,
  89                               bool static_vrfb_allocation)
  90 {
  91         int ret = 0, i, j;
  92         struct omap_vout_device *vout;
  93         struct video_device *vfd;
  94         int image_width, image_height;
  95         int vrfb_num_bufs = VRFB_NUM_BUFS;
  96         struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
  97         struct omap2video_device *vid_dev =
  98                 container_of(v4l2_dev, struct omap2video_device, v4l2_dev);
  99
 100         vout = vid_dev->vouts[vid_num];
 101         vfd = vout->vfd;
 102
 103         for (i = 0; i < VRFB_NUM_BUFS; i++) {
 104                 if (omap_vrfb_request_ctx(&vout->vrfb_context[i])) {
 105                         dev_info(&pdev->dev, ": VRFB allocation failed\n");
 106                         for (j = 0; j < i; j++)
 107                                 omap_vrfb_release_ctx(&vout->vrfb_context[j]);
 108                         ret = -ENOMEM;
 109                         goto free_buffers;
 110                 }
 111         }
 112
 113         /* Calculate VRFB memory size */
 114         /* allocate for worst case size */
 115         image_width = VID_MAX_WIDTH / TILE_SIZE;
 116         if (VID_MAX_WIDTH % TILE_SIZE)
 117                 image_width++;
 118
 119         image_width = image_width * TILE_SIZE;
 120         image_height = VID_MAX_HEIGHT / TILE_SIZE;
 121
 122         if (VID_MAX_HEIGHT % TILE_SIZE)
 123                 image_height++;
 124
 125         image_height = image_height * TILE_SIZE;
 126         vout->smsshado_size = PAGE_ALIGN(image_width * image_height * 2 * 2);
 127
 128         /*
 129          * Request and Initialize DMA, for DMA based VRFB transfer
 130          */
 131         vout->vrfb_dma_tx.dev_id = OMAP_DMA_NO_DEVICE;
 132         vout->vrfb_dma_tx.dma_ch = -1;
 133         vout->vrfb_dma_tx.req_status = DMA_CHAN_ALLOTED;
 134         ret = omap_request_dma(vout->vrfb_dma_tx.dev_id, "VRFB DMA TX",
 135                         omap_vout_vrfb_dma_tx_callback,
 136                         (void *) &vout->vrfb_dma_tx, &vout->vrfb_dma_tx.dma_ch);
 137         if (ret < 0) {
 138                 vout->vrfb_dma_tx.req_status = DMA_CHAN_NOT_ALLOTED;
 139                 dev_info(&pdev->dev, ": failed to allocate DMA Channel for"
 140                                 " video%d\n", vfd->minor);
 141         }
 142         init_waitqueue_head(&vout->vrfb_dma_tx.wait);
 143
 144         /* statically allocated the VRFB buffer is done through
 145            commands line aruments */
 146         if (static_vrfb_allocation) {
 147                 if (omap_vout_allocate_vrfb_buffers(vout, &vrfb_num_bufs, -1)) {
 148                         ret =  -ENOMEM;
 149                         goto release_vrfb_ctx;
 150                 }
 151                 vout->vrfb_static_allocation = 1;
 152         }
 153         return 0;
 154
 155 release_vrfb_ctx:
 156         for (j = 0; j < VRFB_NUM_BUFS; j++)
 157                 omap_vrfb_release_ctx(&vout->vrfb_context[j]);
 158 free_buffers:
 159         omap_vout_free_buffers(vout);
 160
 161         return ret;
 162 }
 163
 164 /*
 165  * Release the VRFB context once the module exits
 166  */
 167 void omap_vout_release_vrfb(struct omap_vout_device *vout)
 168 {
 169         int i;
 170
 171         for (i = 0; i < VRFB_NUM_BUFS; i++)
 172                 omap_vrfb_release_ctx(&vout->vrfb_context[i]);
 173
 174         if (vout->vrfb_dma_tx.req_status == DMA_CHAN_ALLOTED) {
 175                 vout->vrfb_dma_tx.req_status = DMA_CHAN_NOT_ALLOTED;
 176                 omap_free_dma(vout->vrfb_dma_tx.dma_ch);
 177         }
 178 }
 179
 180 /*
 181  * Allocate the buffers for the VRFB space.  Data is copied from V4L2
 182  * buffers to the VRFB buffers using the DMA engine.
 183  */
 184 int omap_vout_vrfb_buffer_setup(struct omap_vout_device *vout,
 185                           unsigned int *count, unsigned int startindex)
 186 {
 187         int i;
 188         bool yuv_mode;
 189
 190         if (!is_rotation_enabled(vout))
 191                 return 0;
 192
 193         /* If rotation is enabled, allocate memory for VRFB space also */
 194         *count = *count > VRFB_NUM_BUFS ? VRFB_NUM_BUFS : *count;
 195
 196         /* Allocate the VRFB buffers only if the buffers are not
 197          * allocated during init time.
 198          */
 199         if (!vout->vrfb_static_allocation)
 200                 if (omap_vout_allocate_vrfb_buffers(vout, count, startindex))
 201                         return -ENOMEM;
 202
 203         if (vout->dss_mode == OMAP_DSS_COLOR_YUV2 ||
 204                         vout->dss_mode == OMAP_DSS_COLOR_UYVY)
 205                 yuv_mode = true;
 206         else
 207                 yuv_mode = false;
 208
 209         for (i = 0; i < *count; i++)
 210                 omap_vrfb_setup(&vout->vrfb_context[i],
 211                                 vout->smsshado_phy_addr[i], vout->pix.width,
 212                                 vout->pix.height, vout->bpp, yuv_mode);
 213
 214         return 0;
 215 }
 216
 217 int omap_vout_prepare_vrfb(struct omap_vout_device *vout,
 218                                 struct videobuf_buffer *vb)
 219 {
 220         dma_addr_t dmabuf;
 221         struct vid_vrfb_dma *tx;
 222         enum dss_rotation rotation;
 223         u32 dest_frame_index = 0, src_element_index = 0;
 224         u32 dest_element_index = 0, src_frame_index = 0;
 225         u32 elem_count = 0, frame_count = 0, pixsize = 2;
 226
 227         if (!is_rotation_enabled(vout))
 228                 return 0;
 229
 230         dmabuf = vout->buf_phy_addr[vb->i];
 231         /* If rotation is enabled, copy input buffer into VRFB
 232          * memory space using DMA. We are copying input buffer
 233          * into VRFB memory space of desired angle and DSS will
 234          * read image VRFB memory for 0 degree angle
 235          */
 236         pixsize = vout->bpp * vout->vrfb_bpp;
 237         /*
 238          * DMA transfer in double index mode
 239          */
 240
 241         /* Frame index */
 242         dest_frame_index = ((MAX_PIXELS_PER_LINE * pixsize) -
 243                         (vout->pix.width * vout->bpp)) + 1;
 244
 245         /* Source and destination parameters */
 246         src_element_index = 0;
 247         src_frame_index = 0;
 248         dest_element_index = 1;
 249         /* Number of elements per frame */
 250         elem_count = vout->pix.width * vout->bpp;
 251         frame_count = vout->pix.height;
 252         tx = &vout->vrfb_dma_tx;
 253         tx->tx_status = 0;
 254         omap_set_dma_transfer_params(tx->dma_ch, OMAP_DMA_DATA_TYPE_S32,
 255                         (elem_count / 4), frame_count, OMAP_DMA_SYNC_ELEMENT,
 256                         tx->dev_id, 0x0);
 257         /* src_port required only for OMAP1 */
 258         omap_set_dma_src_params(tx->dma_ch, 0, OMAP_DMA_AMODE_POST_INC,
 259                         dmabuf, src_element_index, src_frame_index);
 260         /*set dma source burst mode for VRFB */
 261         omap_set_dma_src_burst_mode(tx->dma_ch, OMAP_DMA_DATA_BURST_16);
 262         rotation = calc_rotation(vout);
 263
 264         /* dest_port required only for OMAP1 */
 265         omap_set_dma_dest_params(tx->dma_ch, 0, OMAP_DMA_AMODE_DOUBLE_IDX,
 266                         vout->vrfb_context[vb->i].paddr[0], dest_element_index,
 267                         dest_frame_index);
 268         /*set dma dest burst mode for VRFB */
 269         omap_set_dma_dest_burst_mode(tx->dma_ch, OMAP_DMA_DATA_BURST_16);
 270         omap_dma_set_global_params(DMA_DEFAULT_ARB_RATE, 0x20, 0);
 271
 272         omap_start_dma(tx->dma_ch);
 273         interruptible_sleep_on_timeout(&tx->wait, VRFB_TX_TIMEOUT);
 274
 275         if (tx->tx_status == 0) {
 276                 omap_stop_dma(tx->dma_ch);
 277                 return -EINVAL;
 278         }
 279         /* Store buffers physical address into an array. Addresses
 280          * from this array will be used to configure DSS */
 281         vout->queued_buf_addr[vb->i] = (u8 *)
 282                 vout->vrfb_context[vb->i].paddr[rotation];
 283         return 0;
 284 }
 285
 286 /*
 287  * Calculate the buffer offsets from which the streaming should
 288  * start. This offset calculation is mainly required because of
 289  * the VRFB 32 pixels alignment with rotation.
 290  */
 291 void omap_vout_calculate_vrfb_offset(struct omap_vout_device *vout)
 292 {
 293         enum dss_rotation rotation;
 294         bool mirroring = vout->mirror;
 295         struct v4l2_rect *crop = &vout->crop;
 296         struct v4l2_pix_format *pix = &vout->pix;
 297         int *cropped_offset = &vout->cropped_offset;
 298         int vr_ps = 1, ps = 2, temp_ps = 2;
 299         int offset = 0, ctop = 0, cleft = 0, line_length = 0;
 300
 301         rotation = calc_rotation(vout);
 302
 303         if (V4L2_PIX_FMT_YUYV == pix->pixelformat ||
 304                         V4L2_PIX_FMT_UYVY == pix->pixelformat) {
 305                 if (is_rotation_enabled(vout)) {
 306                         /*
 307                          * ps    - Actual pixel size for YUYV/UYVY for
 308                          *         VRFB/Mirroring is 4 bytes
 309                          * vr_ps - Virtually pixel size for YUYV/UYVY is
 310                          *         2 bytes
 311                          */
 312                         ps = 4;
 313                         vr_ps = 2;
 314                 } else {
 315                         ps = 2; /* otherwise the pixel size is 2 byte */
 316                 }
 317         } else if (V4L2_PIX_FMT_RGB32 == pix->pixelformat) {
 318                 ps = 4;
 319         } else if (V4L2_PIX_FMT_RGB24 == pix->pixelformat) {
 320                 ps = 3;
 321         }
 322         vout->ps = ps;
 323         vout->vr_ps = vr_ps;
 324
 325         if (is_rotation_enabled(vout)) {
 326                 line_length = MAX_PIXELS_PER_LINE;
 327                 ctop = (pix->height - crop->height) - crop->top;
 328                 cleft = (pix->width - crop->width) - crop->left;
 329         } else {
 330                 line_length = pix->width;
 331         }
 332         vout->line_length = line_length;
 333         switch (rotation) {
 334         case dss_rotation_90_degree:
 335                 offset = vout->vrfb_context[0].yoffset *
 336                         vout->vrfb_context[0].bytespp;
 337                 temp_ps = ps / vr_ps;
 338                 if (mirroring == 0) {
 339                         *cropped_offset = offset + line_length *
 340                                 temp_ps * cleft + crop->top * temp_ps;
 341                 } else {
 342                         *cropped_offset = offset + line_length * temp_ps *
 343                                 cleft + crop->top * temp_ps + (line_length *
 344                                 ((crop->width / (vr_ps)) - 1) * ps);
 345                 }
 346                 break;
 347         case dss_rotation_180_degree:
 348                 offset = ((MAX_PIXELS_PER_LINE * vout->vrfb_context[0].yoffset *
 349                         vout->vrfb_context[0].bytespp) +
 350                         (vout->vrfb_context[0].xoffset *
 351                         vout->vrfb_context[0].bytespp));
 352                 if (mirroring == 0) {
 353                         *cropped_offset = offset + (line_length * ps * ctop) +
 354                                 (cleft / vr_ps) * ps;
 355
 356                 } else {
 357                         *cropped_offset = offset + (line_length * ps * ctop) +
 358                                 (cleft / vr_ps) * ps + (line_length *
 359                                 (crop->height - 1) * ps);
 360                 }
 361                 break;
 362         case dss_rotation_270_degree:
 363                 offset = MAX_PIXELS_PER_LINE * vout->vrfb_context[0].xoffset *
 364                         vout->vrfb_context[0].bytespp;
 365                 temp_ps = ps / vr_ps;
 366                 if (mirroring == 0) {
 367                         *cropped_offset = offset + line_length *
 368                             temp_ps * crop->left + ctop * ps;
 369                 } else {
 370                         *cropped_offset = offset + line_length *
 371                                 temp_ps * crop->left + ctop * ps +
 372                                 (line_length * ((crop->width / vr_ps) - 1) *
 373                                  ps);
 374                 }
 375                 break;
 376         case dss_rotation_0_degree:
 377                 if (mirroring == 0) {
 378                         *cropped_offset = (line_length * ps) *
 379                                 crop->top + (crop->left / vr_ps) * ps;
 380                 } else {
 381                         *cropped_offset = (line_length * ps) *
 382                                 crop->top + (crop->left / vr_ps) * ps +
 383                                 (line_length * (crop->height - 1) * ps);
 384                 }
 385                 break;
 386         default:
 387                 *cropped_offset = (line_length * ps * crop->top) /
 388                         vr_ps + (crop->left * ps) / vr_ps +
 389                         ((crop->width / vr_ps) - 1) * ps;
 390                 break;
 391         }
 392 }