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/*
* Copyright (C) 2017 Fuzhou Rockchip Electronics Co.Ltd
* Author: Jacob Chen <jacob-chen@iotwrt.com>
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/pm_runtime.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-mem2mem.h>
#include <media/videobuf2-dma-sg.h>
#include <media/videobuf2-v4l2.h>
#include "rga-hw.h"
#include "rga.h"
static int
rga_queue_setup(struct vb2_queue *vq,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], struct device *alloc_devs[])
{
struct rga_ctx *ctx = vb2_get_drv_priv(vq);
struct rga_frame *f = rga_get_frame(ctx, vq->type);
if (IS_ERR(f))
return PTR_ERR(f);
if (*nplanes)
return sizes[0] < f->size ? -EINVAL : 0;
sizes[0] = f->size;
*nplanes = 1;
return 0;
}
static int rga_buf_prepare(struct vb2_buffer *vb)
{
struct rga_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
struct rga_frame *f = rga_get_frame(ctx, vb->vb2_queue->type);
if (IS_ERR(f))
return PTR_ERR(f);
vb2_set_plane_payload(vb, 0, f->size);
return 0;
}
static void rga_buf_queue(struct vb2_buffer *vb)
{
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct rga_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
}
static void rga_buf_return_buffers(struct vb2_queue *q,
enum vb2_buffer_state state)
{
struct rga_ctx *ctx = vb2_get_drv_priv(q);
struct vb2_v4l2_buffer *vbuf;
for (;;) {
if (V4L2_TYPE_IS_OUTPUT(q->type))
vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
else
vbuf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
if (!vbuf)
break;
v4l2_m2m_buf_done(vbuf, state);
}
}
static int rga_buf_start_streaming(struct vb2_queue *q, unsigned int count)
{
struct rga_ctx *ctx = vb2_get_drv_priv(q);
struct rockchip_rga *rga = ctx->rga;
int ret;
ret = pm_runtime_get_sync(rga->dev);
if (ret < 0) {
rga_buf_return_buffers(q, VB2_BUF_STATE_QUEUED);
return ret;
}
return 0;
}
static void rga_buf_stop_streaming(struct vb2_queue *q)
{
struct rga_ctx *ctx = vb2_get_drv_priv(q);
struct rockchip_rga *rga = ctx->rga;
rga_buf_return_buffers(q, VB2_BUF_STATE_ERROR);
pm_runtime_put(rga->dev);
}
const struct vb2_ops rga_qops = {
.queue_setup = rga_queue_setup,
.buf_prepare = rga_buf_prepare,
.buf_queue = rga_buf_queue,
.wait_prepare = vb2_ops_wait_prepare,
.wait_finish = vb2_ops_wait_finish,
.start_streaming = rga_buf_start_streaming,
.stop_streaming = rga_buf_stop_streaming,
};
/* RGA MMU is a 1-Level MMU, so it can't be used through the IOMMU API.
* We use it more like a scatter-gather list.
*/
void rga_buf_map(struct vb2_buffer *vb)
{
struct rga_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
struct rockchip_rga *rga = ctx->rga;
struct sg_table *sgt;
struct scatterlist *sgl;
unsigned int *pages;
unsigned int address, len, i, p;
unsigned int mapped_size = 0;
if (vb->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
pages = rga->src_mmu_pages;
else
pages = rga->dst_mmu_pages;
/* Create local MMU table for RGA */
sgt = vb2_plane_cookie(vb, 0);
for_each_sg(sgt->sgl, sgl, sgt->nents, i) {
len = sg_dma_len(sgl) >> PAGE_SHIFT;
address = sg_phys(sgl);
for (p = 0; p < len; p++) {
dma_addr_t phys = address +
((dma_addr_t)p << PAGE_SHIFT);
pages[mapped_size + p] = phys;
}
mapped_size += len;
}
/* sync local MMU table for RGA */
dma_sync_single_for_device(rga->dev, virt_to_phys(pages),
8 * PAGE_SIZE, DMA_BIDIRECTIONAL);
}
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