![Thomas Gleixner](/assets/img/avatar_default.png)
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 285 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190529141900.642774971@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
149 lines
3.4 KiB
C
149 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2017 Fuzhou Rockchip Electronics Co.Ltd
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* Author: Jacob Chen <jacob-chen@iotwrt.com>
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*/
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#include <linux/pm_runtime.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-ioctl.h>
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#include <media/v4l2-mem2mem.h>
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#include <media/videobuf2-dma-sg.h>
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#include <media/videobuf2-v4l2.h>
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#include "rga-hw.h"
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#include "rga.h"
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static int
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rga_queue_setup(struct vb2_queue *vq,
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unsigned int *nbuffers, unsigned int *nplanes,
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unsigned int sizes[], struct device *alloc_devs[])
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{
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struct rga_ctx *ctx = vb2_get_drv_priv(vq);
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struct rga_frame *f = rga_get_frame(ctx, vq->type);
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if (IS_ERR(f))
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return PTR_ERR(f);
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if (*nplanes)
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return sizes[0] < f->size ? -EINVAL : 0;
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sizes[0] = f->size;
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*nplanes = 1;
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return 0;
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}
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static int rga_buf_prepare(struct vb2_buffer *vb)
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{
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struct rga_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
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struct rga_frame *f = rga_get_frame(ctx, vb->vb2_queue->type);
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if (IS_ERR(f))
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return PTR_ERR(f);
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vb2_set_plane_payload(vb, 0, f->size);
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return 0;
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}
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static void rga_buf_queue(struct vb2_buffer *vb)
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{
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struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
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struct rga_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
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v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
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}
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static void rga_buf_return_buffers(struct vb2_queue *q,
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enum vb2_buffer_state state)
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{
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struct rga_ctx *ctx = vb2_get_drv_priv(q);
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struct vb2_v4l2_buffer *vbuf;
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for (;;) {
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if (V4L2_TYPE_IS_OUTPUT(q->type))
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vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
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else
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vbuf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
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if (!vbuf)
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break;
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v4l2_m2m_buf_done(vbuf, state);
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}
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}
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static int rga_buf_start_streaming(struct vb2_queue *q, unsigned int count)
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{
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struct rga_ctx *ctx = vb2_get_drv_priv(q);
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struct rockchip_rga *rga = ctx->rga;
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int ret;
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ret = pm_runtime_get_sync(rga->dev);
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if (ret < 0) {
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rga_buf_return_buffers(q, VB2_BUF_STATE_QUEUED);
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return ret;
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}
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return 0;
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}
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static void rga_buf_stop_streaming(struct vb2_queue *q)
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{
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struct rga_ctx *ctx = vb2_get_drv_priv(q);
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struct rockchip_rga *rga = ctx->rga;
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rga_buf_return_buffers(q, VB2_BUF_STATE_ERROR);
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pm_runtime_put(rga->dev);
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}
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const struct vb2_ops rga_qops = {
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.queue_setup = rga_queue_setup,
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.buf_prepare = rga_buf_prepare,
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.buf_queue = rga_buf_queue,
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.wait_prepare = vb2_ops_wait_prepare,
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.wait_finish = vb2_ops_wait_finish,
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.start_streaming = rga_buf_start_streaming,
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.stop_streaming = rga_buf_stop_streaming,
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};
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/* RGA MMU is a 1-Level MMU, so it can't be used through the IOMMU API.
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* We use it more like a scatter-gather list.
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*/
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void rga_buf_map(struct vb2_buffer *vb)
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{
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struct rga_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
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struct rockchip_rga *rga = ctx->rga;
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struct sg_table *sgt;
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struct scatterlist *sgl;
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unsigned int *pages;
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unsigned int address, len, i, p;
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unsigned int mapped_size = 0;
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if (vb->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
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pages = rga->src_mmu_pages;
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else
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pages = rga->dst_mmu_pages;
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/* Create local MMU table for RGA */
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sgt = vb2_plane_cookie(vb, 0);
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for_each_sg(sgt->sgl, sgl, sgt->nents, i) {
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len = sg_dma_len(sgl) >> PAGE_SHIFT;
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address = sg_phys(sgl);
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for (p = 0; p < len; p++) {
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dma_addr_t phys = address +
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((dma_addr_t)p << PAGE_SHIFT);
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pages[mapped_size + p] = phys;
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}
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mapped_size += len;
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}
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/* sync local MMU table for RGA */
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dma_sync_single_for_device(rga->dev, virt_to_phys(pages),
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8 * PAGE_SIZE, DMA_BIDIRECTIONAL);
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}
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