/*
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* omap_vout_vrfb.c
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*
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* Copyright (C) 2010 Texas Instruments.
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*
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* This file is licensed under the terms of the GNU General Public License
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* version 2. This program is licensed "as is" without any warranty of any
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* kind, whether express or implied.
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*
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*/
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#include <linux/sched.h>
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#include <linux/platform_device.h>
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#include <linux/videodev2.h>
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#include <linux/slab.h>
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#include <media/v4l2-device.h>
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#include <video/omapvrfb.h>
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#include "omap_voutdef.h"
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#include "omap_voutlib.h"
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#include "omap_vout_vrfb.h"
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#define OMAP_DMA_NO_DEVICE 0
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/*
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* Function for allocating video buffers
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*/
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static int omap_vout_allocate_vrfb_buffers(struct omap_vout_device *vout,
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unsigned int *count, int startindex)
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{
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int i, j;
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for (i = 0; i < *count; i++) {
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if (!vout->smsshado_virt_addr[i]) {
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vout->smsshado_virt_addr[i] =
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omap_vout_alloc_buffer(vout->smsshado_size,
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&vout->smsshado_phy_addr[i]);
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}
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if (!vout->smsshado_virt_addr[i] && startindex != -1) {
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if (vout->vq.memory == V4L2_MEMORY_MMAP && i >= startindex)
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break;
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}
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if (!vout->smsshado_virt_addr[i]) {
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for (j = 0; j < i; j++) {
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omap_vout_free_buffer(
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vout->smsshado_virt_addr[j],
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vout->smsshado_size);
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vout->smsshado_virt_addr[j] = 0;
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vout->smsshado_phy_addr[j] = 0;
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}
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*count = 0;
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return -ENOMEM;
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}
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memset((void *)(long)vout->smsshado_virt_addr[i], 0,
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vout->smsshado_size);
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}
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return 0;
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}
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/*
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* Wakes up the application once the DMA transfer to VRFB space is completed.
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*/
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static void omap_vout_vrfb_dma_tx_callback(void *data)
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{
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struct vid_vrfb_dma *t = (struct vid_vrfb_dma *) data;
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t->tx_status = 1;
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wake_up_interruptible(&t->wait);
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}
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/*
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* Free VRFB buffers
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*/
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void omap_vout_free_vrfb_buffers(struct omap_vout_device *vout)
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{
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int j;
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for (j = 0; j < VRFB_NUM_BUFS; j++) {
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if (vout->smsshado_virt_addr[j]) {
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omap_vout_free_buffer(vout->smsshado_virt_addr[j],
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vout->smsshado_size);
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vout->smsshado_virt_addr[j] = 0;
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vout->smsshado_phy_addr[j] = 0;
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}
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}
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}
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int omap_vout_setup_vrfb_bufs(struct platform_device *pdev, int vid_num,
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bool static_vrfb_allocation)
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{
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int ret = 0, i, j;
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struct omap_vout_device *vout;
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struct video_device *vfd;
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dma_cap_mask_t mask;
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int image_width, image_height;
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int vrfb_num_bufs = VRFB_NUM_BUFS;
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struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
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struct omap2video_device *vid_dev =
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container_of(v4l2_dev, struct omap2video_device, v4l2_dev);
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vout = vid_dev->vouts[vid_num];
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vfd = vout->vfd;
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for (i = 0; i < VRFB_NUM_BUFS; i++) {
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if (omap_vrfb_request_ctx(&vout->vrfb_context[i])) {
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dev_info(&pdev->dev, ": VRFB allocation failed\n");
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for (j = 0; j < i; j++)
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omap_vrfb_release_ctx(&vout->vrfb_context[j]);
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return -ENOMEM;
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}
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}
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/* Calculate VRFB memory size */
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/* allocate for worst case size */
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image_width = VID_MAX_WIDTH / TILE_SIZE;
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if (VID_MAX_WIDTH % TILE_SIZE)
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image_width++;
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image_width = image_width * TILE_SIZE;
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image_height = VID_MAX_HEIGHT / TILE_SIZE;
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if (VID_MAX_HEIGHT % TILE_SIZE)
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image_height++;
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image_height = image_height * TILE_SIZE;
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vout->smsshado_size = PAGE_ALIGN(image_width * image_height * 2 * 2);
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/*
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* Request and Initialize DMA, for DMA based VRFB transfer
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*/
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dma_cap_zero(mask);
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dma_cap_set(DMA_INTERLEAVE, mask);
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vout->vrfb_dma_tx.chan = dma_request_chan_by_mask(&mask);
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if (IS_ERR(vout->vrfb_dma_tx.chan)) {
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vout->vrfb_dma_tx.req_status = DMA_CHAN_NOT_ALLOTED;
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} else {
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size_t xt_size = sizeof(struct dma_interleaved_template) +
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sizeof(struct data_chunk);
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vout->vrfb_dma_tx.xt = kzalloc(xt_size, GFP_KERNEL);
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if (!vout->vrfb_dma_tx.xt) {
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dma_release_channel(vout->vrfb_dma_tx.chan);
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vout->vrfb_dma_tx.req_status = DMA_CHAN_NOT_ALLOTED;
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}
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}
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if (vout->vrfb_dma_tx.req_status == DMA_CHAN_NOT_ALLOTED)
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dev_info(&pdev->dev,
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": failed to allocate DMA Channel for video%d\n",
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vfd->minor);
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init_waitqueue_head(&vout->vrfb_dma_tx.wait);
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/*
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* statically allocated the VRFB buffer is done through
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* command line arguments
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*/
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if (static_vrfb_allocation) {
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if (omap_vout_allocate_vrfb_buffers(vout, &vrfb_num_bufs, -1)) {
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ret = -ENOMEM;
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goto release_vrfb_ctx;
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}
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vout->vrfb_static_allocation = true;
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}
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return 0;
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release_vrfb_ctx:
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for (j = 0; j < VRFB_NUM_BUFS; j++)
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omap_vrfb_release_ctx(&vout->vrfb_context[j]);
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return ret;
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}
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/*
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* Release the VRFB context once the module exits
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*/
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void omap_vout_release_vrfb(struct omap_vout_device *vout)
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{
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int i;
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for (i = 0; i < VRFB_NUM_BUFS; i++)
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omap_vrfb_release_ctx(&vout->vrfb_context[i]);
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if (vout->vrfb_dma_tx.req_status == DMA_CHAN_ALLOTED) {
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vout->vrfb_dma_tx.req_status = DMA_CHAN_NOT_ALLOTED;
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kfree(vout->vrfb_dma_tx.xt);
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dmaengine_terminate_sync(vout->vrfb_dma_tx.chan);
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dma_release_channel(vout->vrfb_dma_tx.chan);
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}
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}
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/*
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* Allocate the buffers for the VRFB space. Data is copied from V4L2
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* buffers to the VRFB buffers using the DMA engine.
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*/
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int omap_vout_vrfb_buffer_setup(struct omap_vout_device *vout,
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unsigned int *count, unsigned int startindex)
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{
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int i;
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bool yuv_mode;
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if (!is_rotation_enabled(vout))
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return 0;
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/* If rotation is enabled, allocate memory for VRFB space also */
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*count = *count > VRFB_NUM_BUFS ? VRFB_NUM_BUFS : *count;
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/* Allocate the VRFB buffers only if the buffers are not
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* allocated during init time.
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*/
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if (!vout->vrfb_static_allocation)
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if (omap_vout_allocate_vrfb_buffers(vout, count, startindex))
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return -ENOMEM;
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if (vout->dss_mode == OMAP_DSS_COLOR_YUV2 ||
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vout->dss_mode == OMAP_DSS_COLOR_UYVY)
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yuv_mode = true;
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else
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yuv_mode = false;
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for (i = 0; i < *count; i++)
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omap_vrfb_setup(&vout->vrfb_context[i],
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vout->smsshado_phy_addr[i], vout->pix.width,
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vout->pix.height, vout->bpp, yuv_mode);
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return 0;
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}
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int omap_vout_prepare_vrfb(struct omap_vout_device *vout,
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struct vb2_buffer *vb)
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{
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struct dma_async_tx_descriptor *tx;
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enum dma_ctrl_flags flags = DMA_PREP_INTERRUPT | DMA_CTRL_ACK;
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struct dma_chan *chan = vout->vrfb_dma_tx.chan;
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struct dma_interleaved_template *xt = vout->vrfb_dma_tx.xt;
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dma_cookie_t cookie;
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dma_addr_t buf_phy_addr = vb2_dma_contig_plane_dma_addr(vb, 0);
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enum dma_status status;
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enum dss_rotation rotation;
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size_t dst_icg;
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u32 pixsize;
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if (!is_rotation_enabled(vout))
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return 0;
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/* If rotation is enabled, copy input buffer into VRFB
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* memory space using DMA. We are copying input buffer
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* into VRFB memory space of desired angle and DSS will
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* read image VRFB memory for 0 degree angle
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*/
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pixsize = vout->bpp * vout->vrfb_bpp;
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dst_icg = MAX_PIXELS_PER_LINE * pixsize - vout->pix.width * vout->bpp;
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xt->src_start = buf_phy_addr;
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xt->dst_start = vout->vrfb_context[vb->index].paddr[0];
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xt->numf = vout->pix.height;
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xt->frame_size = 1;
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xt->sgl[0].size = vout->pix.width * vout->bpp;
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xt->sgl[0].icg = dst_icg;
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xt->dir = DMA_MEM_TO_MEM;
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xt->src_sgl = false;
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xt->src_inc = true;
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xt->dst_sgl = true;
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xt->dst_inc = true;
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tx = dmaengine_prep_interleaved_dma(chan, xt, flags);
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if (tx == NULL) {
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pr_err("%s: DMA interleaved prep error\n", __func__);
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return -EINVAL;
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}
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tx->callback = omap_vout_vrfb_dma_tx_callback;
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tx->callback_param = &vout->vrfb_dma_tx;
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cookie = dmaengine_submit(tx);
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if (dma_submit_error(cookie)) {
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pr_err("%s: dmaengine_submit failed (%d)\n", __func__, cookie);
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return -EINVAL;
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}
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vout->vrfb_dma_tx.tx_status = 0;
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dma_async_issue_pending(chan);
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wait_event_interruptible_timeout(vout->vrfb_dma_tx.wait,
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vout->vrfb_dma_tx.tx_status == 1,
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VRFB_TX_TIMEOUT);
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status = dma_async_is_tx_complete(chan, cookie, NULL, NULL);
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if (vout->vrfb_dma_tx.tx_status == 0) {
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pr_err("%s: Timeout while waiting for DMA\n", __func__);
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dmaengine_terminate_sync(chan);
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return -EINVAL;
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} else if (status != DMA_COMPLETE) {
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pr_err("%s: DMA completion %s status\n", __func__,
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status == DMA_ERROR ? "error" : "busy");
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dmaengine_terminate_sync(chan);
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return -EINVAL;
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}
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/* Store buffers physical address into an array. Addresses
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* from this array will be used to configure DSS */
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rotation = calc_rotation(vout);
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vout->queued_buf_addr[vb->index] = (u8 *)
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vout->vrfb_context[vb->index].paddr[rotation];
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return 0;
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}
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/*
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* Calculate the buffer offsets from which the streaming should
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* start. This offset calculation is mainly required because of
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* the VRFB 32 pixels alignment with rotation.
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*/
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void omap_vout_calculate_vrfb_offset(struct omap_vout_device *vout)
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{
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enum dss_rotation rotation;
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bool mirroring = vout->mirror;
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struct v4l2_rect *crop = &vout->crop;
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struct v4l2_pix_format *pix = &vout->pix;
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int *cropped_offset = &vout->cropped_offset;
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int vr_ps = 1, ps = 2, temp_ps = 2;
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int offset = 0, ctop = 0, cleft = 0, line_length = 0;
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rotation = calc_rotation(vout);
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if (V4L2_PIX_FMT_YUYV == pix->pixelformat ||
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V4L2_PIX_FMT_UYVY == pix->pixelformat) {
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if (is_rotation_enabled(vout)) {
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/*
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* ps - Actual pixel size for YUYV/UYVY for
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* VRFB/Mirroring is 4 bytes
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* vr_ps - Virtually pixel size for YUYV/UYVY is
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* 2 bytes
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*/
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ps = 4;
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vr_ps = 2;
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} else {
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ps = 2; /* otherwise the pixel size is 2 byte */
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}
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} else if (V4L2_PIX_FMT_RGB32 == pix->pixelformat) {
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ps = 4;
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} else if (V4L2_PIX_FMT_RGB24 == pix->pixelformat) {
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ps = 3;
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}
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vout->ps = ps;
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vout->vr_ps = vr_ps;
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if (is_rotation_enabled(vout)) {
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line_length = MAX_PIXELS_PER_LINE;
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ctop = (pix->height - crop->height) - crop->top;
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cleft = (pix->width - crop->width) - crop->left;
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} else {
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line_length = pix->width;
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}
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vout->line_length = line_length;
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switch (rotation) {
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case dss_rotation_90_degree:
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offset = vout->vrfb_context[0].yoffset *
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vout->vrfb_context[0].bytespp;
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temp_ps = ps / vr_ps;
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if (!mirroring) {
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*cropped_offset = offset + line_length *
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temp_ps * cleft + crop->top * temp_ps;
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} else {
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*cropped_offset = offset + line_length * temp_ps *
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cleft + crop->top * temp_ps + (line_length *
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((crop->width / (vr_ps)) - 1) * ps);
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}
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break;
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case dss_rotation_180_degree:
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offset = ((MAX_PIXELS_PER_LINE * vout->vrfb_context[0].yoffset *
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vout->vrfb_context[0].bytespp) +
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(vout->vrfb_context[0].xoffset *
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vout->vrfb_context[0].bytespp));
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if (!mirroring) {
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*cropped_offset = offset + (line_length * ps * ctop) +
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(cleft / vr_ps) * ps;
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} else {
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*cropped_offset = offset + (line_length * ps * ctop) +
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(cleft / vr_ps) * ps + (line_length *
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(crop->height - 1) * ps);
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}
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break;
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case dss_rotation_270_degree:
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offset = MAX_PIXELS_PER_LINE * vout->vrfb_context[0].xoffset *
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vout->vrfb_context[0].bytespp;
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temp_ps = ps / vr_ps;
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if (!mirroring) {
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*cropped_offset = offset + line_length *
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temp_ps * crop->left + ctop * ps;
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} else {
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*cropped_offset = offset + line_length *
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temp_ps * crop->left + ctop * ps +
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(line_length * ((crop->width / vr_ps) - 1) *
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ps);
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}
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break;
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case dss_rotation_0_degree:
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if (!mirroring) {
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*cropped_offset = (line_length * ps) *
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crop->top + (crop->left / vr_ps) * ps;
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} else {
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*cropped_offset = (line_length * ps) *
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crop->top + (crop->left / vr_ps) * ps +
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(line_length * (crop->height - 1) * ps);
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}
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break;
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default:
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*cropped_offset = (line_length * ps * crop->top) /
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vr_ps + (crop->left * ps) / vr_ps +
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((crop->width / vr_ps) - 1) * ps;
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break;
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}
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}
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