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[media] rockchip/rga: v4l2 m2m support
Rockchip RGA is a separate 2D raster graphic acceleration unit. It accelerates 2D graphics operations, such as point/line drawing, image scaling, rotation, BitBLT, alpha blending and image blur/sharpness The driver supports various operations from the rendering pipeline. - copy - fast solid color fill - rotation - flip - alpha blending The code in rga-hw.c is used to configure regs according to operations The code in rga-buf.c is used to create private mmu table for RGA. Signed-off-by: Jacob Chen <jacob-chen@iotwrt.com> Signed-off-by: Hans Verkuil <hansverk@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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rockchip-rga-objs := rga.o rga-hw.o rga-buf.o | ||
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obj-$(CONFIG_VIDEO_ROCKCHIP_RGA) += rockchip-rga.o |
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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. | ||
*/ | ||
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#include <linux/pm_runtime.h> | ||
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#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> | ||
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#include "rga-hw.h" | ||
#include "rga.h" | ||
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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); | ||
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if (IS_ERR(f)) | ||
return PTR_ERR(f); | ||
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if (*nplanes) | ||
return sizes[0] < f->size ? -EINVAL : 0; | ||
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sizes[0] = f->size; | ||
*nplanes = 1; | ||
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return 0; | ||
} | ||
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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); | ||
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if (IS_ERR(f)) | ||
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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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); | ||
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v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf); | ||
} | ||
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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, i; | ||
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ret = pm_runtime_get_sync(rga->dev); | ||
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if (!ret) | ||
return 0; | ||
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for (i = 0; i < q->num_buffers; ++i) { | ||
if (q->bufs[i]->state == VB2_BUF_STATE_ACTIVE) { | ||
v4l2_m2m_buf_done(to_vb2_v4l2_buffer(q->bufs[i]), | ||
VB2_BUF_STATE_QUEUED); | ||
} | ||
} | ||
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return ret; | ||
} | ||
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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; | ||
struct vb2_v4l2_buffer *vbuf; | ||
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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, VB2_BUF_STATE_ERROR); | ||
} | ||
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pm_runtime_put(rga->dev); | ||
} | ||
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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, | ||
}; | ||
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/* 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; | ||
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if (vb->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) | ||
pages = rga->src_mmu_pages; | ||
else | ||
pages = rga->dst_mmu_pages; | ||
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/* Create local MMU table for RGA */ | ||
sgt = vb2_plane_cookie(vb, 0); | ||
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for_each_sg(sgt->sgl, sgl, sgt->nents, i) { | ||
len = sg_dma_len(sgl) >> PAGE_SHIFT; | ||
address = sg_phys(sgl); | ||
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for (p = 0; p < len; p++) { | ||
dma_addr_t phys = address + (p << PAGE_SHIFT); | ||
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pages[mapped_size + p] = phys; | ||
} | ||
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mapped_size += len; | ||
} | ||
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/* 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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