diff options
Diffstat (limited to 'drivers/media/platform/omap/omap_vout_vrfb.c')
| -rw-r--r-- | drivers/media/platform/omap/omap_vout_vrfb.c | 394 |
1 files changed, 394 insertions, 0 deletions
diff --git a/drivers/media/platform/omap/omap_vout_vrfb.c b/drivers/media/platform/omap/omap_vout_vrfb.c new file mode 100644 index 000000000..c6e252760 --- /dev/null +++ b/drivers/media/platform/omap/omap_vout_vrfb.c @@ -0,0 +1,394 @@ +/* + * omap_vout_vrfb.c + * + * Copyright (C) 2010 Texas Instruments. + * + * This file is licensed under the terms of the GNU General Public License + * version 2. This program is licensed "as is" without any warranty of any + * kind, whether express or implied. + * + */ + +#include <linux/sched.h> +#include <linux/platform_device.h> +#include <linux/videodev2.h> + +#include <media/videobuf-dma-contig.h> +#include <media/v4l2-device.h> + +#include <linux/omap-dma.h> +#include <video/omapvrfb.h> + +#include "omap_voutdef.h" +#include "omap_voutlib.h" +#include "omap_vout_vrfb.h" + +#define OMAP_DMA_NO_DEVICE 0 + +/* + * Function for allocating video buffers + */ +static int omap_vout_allocate_vrfb_buffers(struct omap_vout_device *vout, + unsigned int *count, int startindex) +{ + int i, j; + + for (i = 0; i < *count; i++) { + if (!vout->smsshado_virt_addr[i]) { + vout->smsshado_virt_addr[i] = + omap_vout_alloc_buffer(vout->smsshado_size, + &vout->smsshado_phy_addr[i]); + } + if (!vout->smsshado_virt_addr[i] && startindex != -1) { + if (V4L2_MEMORY_MMAP == vout->memory && i >= startindex) + break; + } + if (!vout->smsshado_virt_addr[i]) { + for (j = 0; j < i; j++) { + omap_vout_free_buffer( + vout->smsshado_virt_addr[j], + vout->smsshado_size); + vout->smsshado_virt_addr[j] = 0; + vout->smsshado_phy_addr[j] = 0; + } + *count = 0; + return -ENOMEM; + } + memset((void *) vout->smsshado_virt_addr[i], 0, + vout->smsshado_size); + } + return 0; +} + +/* + * Wakes up the application once the DMA transfer to VRFB space is completed. + */ +static void omap_vout_vrfb_dma_tx_callback(int lch, u16 ch_status, void *data) +{ + struct vid_vrfb_dma *t = (struct vid_vrfb_dma *) data; + + t->tx_status = 1; + wake_up_interruptible(&t->wait); +} + +/* + * Free VRFB buffers + */ +void omap_vout_free_vrfb_buffers(struct omap_vout_device *vout) +{ + int j; + + for (j = 0; j < VRFB_NUM_BUFS; j++) { + omap_vout_free_buffer(vout->smsshado_virt_addr[j], + vout->smsshado_size); + vout->smsshado_virt_addr[j] = 0; + vout->smsshado_phy_addr[j] = 0; + } +} + +int omap_vout_setup_vrfb_bufs(struct platform_device *pdev, int vid_num, + bool static_vrfb_allocation) +{ + int ret = 0, i, j; + struct omap_vout_device *vout; + struct video_device *vfd; + int image_width, image_height; + int vrfb_num_bufs = VRFB_NUM_BUFS; + struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev); + struct omap2video_device *vid_dev = + container_of(v4l2_dev, struct omap2video_device, v4l2_dev); + + vout = vid_dev->vouts[vid_num]; + vfd = vout->vfd; + + for (i = 0; i < VRFB_NUM_BUFS; i++) { + if (omap_vrfb_request_ctx(&vout->vrfb_context[i])) { + dev_info(&pdev->dev, ": VRFB allocation failed\n"); + for (j = 0; j < i; j++) + omap_vrfb_release_ctx(&vout->vrfb_context[j]); + ret = -ENOMEM; + goto free_buffers; + } + } + + /* Calculate VRFB memory size */ + /* allocate for worst case size */ + image_width = VID_MAX_WIDTH / TILE_SIZE; + if (VID_MAX_WIDTH % TILE_SIZE) + image_width++; + + image_width = image_width * TILE_SIZE; + image_height = VID_MAX_HEIGHT / TILE_SIZE; + + if (VID_MAX_HEIGHT % TILE_SIZE) + image_height++; + + image_height = image_height * TILE_SIZE; + vout->smsshado_size = PAGE_ALIGN(image_width * image_height * 2 * 2); + + /* + * Request and Initialize DMA, for DMA based VRFB transfer + */ + vout->vrfb_dma_tx.dev_id = OMAP_DMA_NO_DEVICE; + vout->vrfb_dma_tx.dma_ch = -1; + vout->vrfb_dma_tx.req_status = DMA_CHAN_ALLOTED; + ret = omap_request_dma(vout->vrfb_dma_tx.dev_id, "VRFB DMA TX", + omap_vout_vrfb_dma_tx_callback, + (void *) &vout->vrfb_dma_tx, &vout->vrfb_dma_tx.dma_ch); + if (ret < 0) { + vout->vrfb_dma_tx.req_status = DMA_CHAN_NOT_ALLOTED; + dev_info(&pdev->dev, ": failed to allocate DMA Channel for" + " video%d\n", vfd->minor); + } + init_waitqueue_head(&vout->vrfb_dma_tx.wait); + + /* statically allocated the VRFB buffer is done through + commands line aruments */ + if (static_vrfb_allocation) { + if (omap_vout_allocate_vrfb_buffers(vout, &vrfb_num_bufs, -1)) { + ret = -ENOMEM; + goto release_vrfb_ctx; + } + vout->vrfb_static_allocation = true; + } + return 0; + +release_vrfb_ctx: + for (j = 0; j < VRFB_NUM_BUFS; j++) + omap_vrfb_release_ctx(&vout->vrfb_context[j]); +free_buffers: + omap_vout_free_buffers(vout); + + return ret; +} + +/* + * Release the VRFB context once the module exits + */ +void omap_vout_release_vrfb(struct omap_vout_device *vout) +{ + int i; + + for (i = 0; i < VRFB_NUM_BUFS; i++) + omap_vrfb_release_ctx(&vout->vrfb_context[i]); + + if (vout->vrfb_dma_tx.req_status == DMA_CHAN_ALLOTED) { + vout->vrfb_dma_tx.req_status = DMA_CHAN_NOT_ALLOTED; + omap_free_dma(vout->vrfb_dma_tx.dma_ch); + } +} + +/* + * Allocate the buffers for the VRFB space. Data is copied from V4L2 + * buffers to the VRFB buffers using the DMA engine. + */ +int omap_vout_vrfb_buffer_setup(struct omap_vout_device *vout, + unsigned int *count, unsigned int startindex) +{ + int i; + bool yuv_mode; + + if (!is_rotation_enabled(vout)) + return 0; + + /* If rotation is enabled, allocate memory for VRFB space also */ + *count = *count > VRFB_NUM_BUFS ? VRFB_NUM_BUFS : *count; + + /* Allocate the VRFB buffers only if the buffers are not + * allocated during init time. + */ + if (!vout->vrfb_static_allocation) + if (omap_vout_allocate_vrfb_buffers(vout, count, startindex)) + return -ENOMEM; + + if (vout->dss_mode == OMAP_DSS_COLOR_YUV2 || + vout->dss_mode == OMAP_DSS_COLOR_UYVY) + yuv_mode = true; + else + yuv_mode = false; + + for (i = 0; i < *count; i++) + omap_vrfb_setup(&vout->vrfb_context[i], + vout->smsshado_phy_addr[i], vout->pix.width, + vout->pix.height, vout->bpp, yuv_mode); + + return 0; +} + +int omap_vout_prepare_vrfb(struct omap_vout_device *vout, + struct videobuf_buffer *vb) +{ + dma_addr_t dmabuf; + struct vid_vrfb_dma *tx; + enum dss_rotation rotation; + u32 dest_frame_index = 0, src_element_index = 0; + u32 dest_element_index = 0, src_frame_index = 0; + u32 elem_count = 0, frame_count = 0, pixsize = 2; + + if (!is_rotation_enabled(vout)) + return 0; + + dmabuf = vout->buf_phy_addr[vb->i]; + /* If rotation is enabled, copy input buffer into VRFB + * memory space using DMA. We are copying input buffer + * into VRFB memory space of desired angle and DSS will + * read image VRFB memory for 0 degree angle + */ + pixsize = vout->bpp * vout->vrfb_bpp; + /* + * DMA transfer in double index mode + */ + + /* Frame index */ + dest_frame_index = ((MAX_PIXELS_PER_LINE * pixsize) - + (vout->pix.width * vout->bpp)) + 1; + + /* Source and destination parameters */ + src_element_index = 0; + src_frame_index = 0; + dest_element_index = 1; + /* Number of elements per frame */ + elem_count = vout->pix.width * vout->bpp; + frame_count = vout->pix.height; + tx = &vout->vrfb_dma_tx; + tx->tx_status = 0; + omap_set_dma_transfer_params(tx->dma_ch, OMAP_DMA_DATA_TYPE_S32, + (elem_count / 4), frame_count, OMAP_DMA_SYNC_ELEMENT, + tx->dev_id, 0x0); + /* src_port required only for OMAP1 */ + omap_set_dma_src_params(tx->dma_ch, 0, OMAP_DMA_AMODE_POST_INC, + dmabuf, src_element_index, src_frame_index); + /*set dma source burst mode for VRFB */ + omap_set_dma_src_burst_mode(tx->dma_ch, OMAP_DMA_DATA_BURST_16); + rotation = calc_rotation(vout); + + /* dest_port required only for OMAP1 */ + omap_set_dma_dest_params(tx->dma_ch, 0, OMAP_DMA_AMODE_DOUBLE_IDX, + vout->vrfb_context[vb->i].paddr[0], dest_element_index, + dest_frame_index); + /*set dma dest burst mode for VRFB */ + omap_set_dma_dest_burst_mode(tx->dma_ch, OMAP_DMA_DATA_BURST_16); + omap_dma_set_global_params(DMA_DEFAULT_ARB_RATE, 0x20, 0); + + omap_start_dma(tx->dma_ch); + wait_event_interruptible_timeout(tx->wait, tx->tx_status == 1, + VRFB_TX_TIMEOUT); + + if (tx->tx_status == 0) { + omap_stop_dma(tx->dma_ch); + return -EINVAL; + } + /* Store buffers physical address into an array. Addresses + * from this array will be used to configure DSS */ + vout->queued_buf_addr[vb->i] = (u8 *) + vout->vrfb_context[vb->i].paddr[rotation]; + return 0; +} + +/* + * Calculate the buffer offsets from which the streaming should + * start. This offset calculation is mainly required because of + * the VRFB 32 pixels alignment with rotation. + */ +void omap_vout_calculate_vrfb_offset(struct omap_vout_device *vout) +{ + enum dss_rotation rotation; + bool mirroring = vout->mirror; + struct v4l2_rect *crop = &vout->crop; + struct v4l2_pix_format *pix = &vout->pix; + int *cropped_offset = &vout->cropped_offset; + int vr_ps = 1, ps = 2, temp_ps = 2; + int offset = 0, ctop = 0, cleft = 0, line_length = 0; + + rotation = calc_rotation(vout); + + if (V4L2_PIX_FMT_YUYV == pix->pixelformat || + V4L2_PIX_FMT_UYVY == pix->pixelformat) { + if (is_rotation_enabled(vout)) { + /* + * ps - Actual pixel size for YUYV/UYVY for + * VRFB/Mirroring is 4 bytes + * vr_ps - Virtually pixel size for YUYV/UYVY is + * 2 bytes + */ + ps = 4; + vr_ps = 2; + } else { + ps = 2; /* otherwise the pixel size is 2 byte */ + } + } else if (V4L2_PIX_FMT_RGB32 == pix->pixelformat) { + ps = 4; + } else if (V4L2_PIX_FMT_RGB24 == pix->pixelformat) { + ps = 3; + } + vout->ps = ps; + vout->vr_ps = vr_ps; + + if (is_rotation_enabled(vout)) { + line_length = MAX_PIXELS_PER_LINE; + ctop = (pix->height - crop->height) - crop->top; + cleft = (pix->width - crop->width) - crop->left; + } else { + line_length = pix->width; + } + vout->line_length = line_length; + switch (rotation) { + case dss_rotation_90_degree: + offset = vout->vrfb_context[0].yoffset * + vout->vrfb_context[0].bytespp; + temp_ps = ps / vr_ps; + if (!mirroring) { + *cropped_offset = offset + line_length * + temp_ps * cleft + crop->top * temp_ps; + } else { + *cropped_offset = offset + line_length * temp_ps * + cleft + crop->top * temp_ps + (line_length * + ((crop->width / (vr_ps)) - 1) * ps); + } + break; + case dss_rotation_180_degree: + offset = ((MAX_PIXELS_PER_LINE * vout->vrfb_context[0].yoffset * + vout->vrfb_context[0].bytespp) + + (vout->vrfb_context[0].xoffset * + vout->vrfb_context[0].bytespp)); + if (!mirroring) { + *cropped_offset = offset + (line_length * ps * ctop) + + (cleft / vr_ps) * ps; + + } else { + *cropped_offset = offset + (line_length * ps * ctop) + + (cleft / vr_ps) * ps + (line_length * + (crop->height - 1) * ps); + } + break; + case dss_rotation_270_degree: + offset = MAX_PIXELS_PER_LINE * vout->vrfb_context[0].xoffset * + vout->vrfb_context[0].bytespp; + temp_ps = ps / vr_ps; + if (!mirroring) { + *cropped_offset = offset + line_length * + temp_ps * crop->left + ctop * ps; + } else { + *cropped_offset = offset + line_length * + temp_ps * crop->left + ctop * ps + + (line_length * ((crop->width / vr_ps) - 1) * + ps); + } + break; + case dss_rotation_0_degree: + if (!mirroring) { + *cropped_offset = (line_length * ps) * + crop->top + (crop->left / vr_ps) * ps; + } else { + *cropped_offset = (line_length * ps) * + crop->top + (crop->left / vr_ps) * ps + + (line_length * (crop->height - 1) * ps); + } + break; + default: + *cropped_offset = (line_length * ps * crop->top) / + vr_ps + (crop->left * ps) / vr_ps + + ((crop->width / vr_ps) - 1) * ps; + break; + } +} |