]> Git Repo - J-linux.git/blob - drivers/media/platform/rockchip/rga/rga-buf.c
Merge tag 'amd-drm-next-6.5-2023-06-09' of https://gitlab.freedesktop.org/agd5f/linux...
[J-linux.git] / drivers / media / platform / rockchip / rga / rga-buf.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (C) 2017 Fuzhou Rockchip Electronics Co.Ltd
4  * Author: Jacob Chen <[email protected]>
5  */
6
7 #include <linux/pm_runtime.h>
8
9 #include <media/v4l2-device.h>
10 #include <media/v4l2-ioctl.h>
11 #include <media/v4l2-mem2mem.h>
12 #include <media/videobuf2-dma-sg.h>
13 #include <media/videobuf2-v4l2.h>
14
15 #include "rga-hw.h"
16 #include "rga.h"
17
18 static int
19 rga_queue_setup(struct vb2_queue *vq,
20                 unsigned int *nbuffers, unsigned int *nplanes,
21                 unsigned int sizes[], struct device *alloc_devs[])
22 {
23         struct rga_ctx *ctx = vb2_get_drv_priv(vq);
24         struct rga_frame *f = rga_get_frame(ctx, vq->type);
25
26         if (IS_ERR(f))
27                 return PTR_ERR(f);
28
29         if (*nplanes)
30                 return sizes[0] < f->size ? -EINVAL : 0;
31
32         sizes[0] = f->size;
33         *nplanes = 1;
34
35         return 0;
36 }
37
38 static int rga_buf_prepare(struct vb2_buffer *vb)
39 {
40         struct rga_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
41         struct rga_frame *f = rga_get_frame(ctx, vb->vb2_queue->type);
42
43         if (IS_ERR(f))
44                 return PTR_ERR(f);
45
46         vb2_set_plane_payload(vb, 0, f->size);
47
48         return 0;
49 }
50
51 static void rga_buf_queue(struct vb2_buffer *vb)
52 {
53         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
54         struct rga_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
55
56         v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
57 }
58
59 static void rga_buf_return_buffers(struct vb2_queue *q,
60                                    enum vb2_buffer_state state)
61 {
62         struct rga_ctx *ctx = vb2_get_drv_priv(q);
63         struct vb2_v4l2_buffer *vbuf;
64
65         for (;;) {
66                 if (V4L2_TYPE_IS_OUTPUT(q->type))
67                         vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
68                 else
69                         vbuf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
70                 if (!vbuf)
71                         break;
72                 v4l2_m2m_buf_done(vbuf, state);
73         }
74 }
75
76 static int rga_buf_start_streaming(struct vb2_queue *q, unsigned int count)
77 {
78         struct rga_ctx *ctx = vb2_get_drv_priv(q);
79         struct rockchip_rga *rga = ctx->rga;
80         int ret;
81
82         ret = pm_runtime_resume_and_get(rga->dev);
83         if (ret < 0) {
84                 rga_buf_return_buffers(q, VB2_BUF_STATE_QUEUED);
85                 return ret;
86         }
87
88         return 0;
89 }
90
91 static void rga_buf_stop_streaming(struct vb2_queue *q)
92 {
93         struct rga_ctx *ctx = vb2_get_drv_priv(q);
94         struct rockchip_rga *rga = ctx->rga;
95
96         rga_buf_return_buffers(q, VB2_BUF_STATE_ERROR);
97         pm_runtime_put(rga->dev);
98 }
99
100 const struct vb2_ops rga_qops = {
101         .queue_setup = rga_queue_setup,
102         .buf_prepare = rga_buf_prepare,
103         .buf_queue = rga_buf_queue,
104         .wait_prepare = vb2_ops_wait_prepare,
105         .wait_finish = vb2_ops_wait_finish,
106         .start_streaming = rga_buf_start_streaming,
107         .stop_streaming = rga_buf_stop_streaming,
108 };
109
110 /* RGA MMU is a 1-Level MMU, so it can't be used through the IOMMU API.
111  * We use it more like a scatter-gather list.
112  */
113 void rga_buf_map(struct vb2_buffer *vb)
114 {
115         struct rga_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
116         struct rockchip_rga *rga = ctx->rga;
117         struct sg_table *sgt;
118         struct scatterlist *sgl;
119         unsigned int *pages;
120         unsigned int address, len, i, p;
121         unsigned int mapped_size = 0;
122
123         if (vb->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
124                 pages = rga->src_mmu_pages;
125         else
126                 pages = rga->dst_mmu_pages;
127
128         /* Create local MMU table for RGA */
129         sgt = vb2_plane_cookie(vb, 0);
130
131         for_each_sg(sgt->sgl, sgl, sgt->nents, i) {
132                 len = sg_dma_len(sgl) >> PAGE_SHIFT;
133                 address = sg_phys(sgl);
134
135                 for (p = 0; p < len; p++) {
136                         dma_addr_t phys = address +
137                                           ((dma_addr_t)p << PAGE_SHIFT);
138
139                         pages[mapped_size + p] = phys;
140                 }
141
142                 mapped_size += len;
143         }
144
145         /* sync local MMU table for RGA */
146         dma_sync_single_for_device(rga->dev, virt_to_phys(pages),
147                                    8 * PAGE_SIZE, DMA_BIDIRECTIONAL);
148 }
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