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654 lines
17 KiB
654 lines
17 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Samsung EXYNOS4x12 FIMC-IS (Imaging Subsystem) driver |
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* |
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* FIMC-IS ISP video input and video output DMA interface driver |
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* |
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* Copyright (C) 2013 Samsung Electronics Co., Ltd. |
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* Author: Sylwester Nawrocki <[email protected]> |
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* |
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* The hardware handling code derived from a driver written by |
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* Younghwan Joo <[email protected]>. |
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*/ |
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|
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#include <linux/bitops.h> |
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#include <linux/device.h> |
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#include <linux/delay.h> |
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#include <linux/errno.h> |
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/types.h> |
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#include <linux/printk.h> |
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#include <linux/pm_runtime.h> |
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#include <linux/slab.h> |
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#include <linux/videodev2.h> |
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|
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#include <media/v4l2-device.h> |
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#include <media/v4l2-ioctl.h> |
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#include <media/videobuf2-v4l2.h> |
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#include <media/videobuf2-dma-contig.h> |
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#include <media/drv-intf/exynos-fimc.h> |
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|
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#include "common.h" |
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#include "media-dev.h" |
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#include "fimc-is.h" |
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#include "fimc-isp-video.h" |
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#include "fimc-is-param.h" |
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|
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static int isp_video_capture_queue_setup(struct vb2_queue *vq, |
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unsigned int *num_buffers, unsigned int *num_planes, |
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unsigned int sizes[], struct device *alloc_devs[]) |
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{ |
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struct fimc_isp *isp = vb2_get_drv_priv(vq); |
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struct v4l2_pix_format_mplane *vid_fmt = &isp->video_capture.pixfmt; |
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const struct fimc_fmt *fmt = isp->video_capture.format; |
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unsigned int wh, i; |
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wh = vid_fmt->width * vid_fmt->height; |
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|
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if (fmt == NULL) |
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return -EINVAL; |
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*num_buffers = clamp_t(u32, *num_buffers, FIMC_ISP_REQ_BUFS_MIN, |
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FIMC_ISP_REQ_BUFS_MAX); |
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if (*num_planes) { |
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if (*num_planes != fmt->memplanes) |
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return -EINVAL; |
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for (i = 0; i < *num_planes; i++) |
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if (sizes[i] < (wh * fmt->depth[i]) / 8) |
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return -EINVAL; |
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return 0; |
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} |
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*num_planes = fmt->memplanes; |
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for (i = 0; i < fmt->memplanes; i++) |
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sizes[i] = (wh * fmt->depth[i]) / 8; |
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return 0; |
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} |
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static inline struct param_dma_output *__get_isp_dma2(struct fimc_is *is) |
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{ |
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return &__get_curr_is_config(is)->isp.dma2_output; |
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} |
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static int isp_video_capture_start_streaming(struct vb2_queue *q, |
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unsigned int count) |
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{ |
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struct fimc_isp *isp = vb2_get_drv_priv(q); |
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struct fimc_is *is = fimc_isp_to_is(isp); |
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struct param_dma_output *dma = __get_isp_dma2(is); |
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struct fimc_is_video *video = &isp->video_capture; |
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int ret; |
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if (!test_bit(ST_ISP_VID_CAP_BUF_PREP, &isp->state) || |
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test_bit(ST_ISP_VID_CAP_STREAMING, &isp->state)) |
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return 0; |
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dma->cmd = DMA_OUTPUT_COMMAND_ENABLE; |
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dma->notify_dma_done = DMA_OUTPUT_NOTIFY_DMA_DONE_ENABLE; |
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dma->buffer_address = is->is_dma_p_region + |
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DMA2_OUTPUT_ADDR_ARRAY_OFFS; |
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dma->buffer_number = video->reqbufs_count; |
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dma->dma_out_mask = video->buf_mask; |
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isp_dbg(2, &video->ve.vdev, |
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"buf_count: %d, planes: %d, dma addr table: %#x\n", |
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video->buf_count, video->format->memplanes, |
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dma->buffer_address); |
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fimc_is_mem_barrier(); |
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fimc_is_set_param_bit(is, PARAM_ISP_DMA2_OUTPUT); |
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__fimc_is_hw_update_param(is, PARAM_ISP_DMA2_OUTPUT); |
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ret = fimc_is_itf_s_param(is, false); |
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if (ret < 0) |
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return ret; |
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ret = fimc_pipeline_call(&video->ve, set_stream, 1); |
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if (ret < 0) |
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return ret; |
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set_bit(ST_ISP_VID_CAP_STREAMING, &isp->state); |
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return ret; |
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} |
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static void isp_video_capture_stop_streaming(struct vb2_queue *q) |
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{ |
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struct fimc_isp *isp = vb2_get_drv_priv(q); |
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struct fimc_is *is = fimc_isp_to_is(isp); |
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struct param_dma_output *dma = __get_isp_dma2(is); |
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int ret; |
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ret = fimc_pipeline_call(&isp->video_capture.ve, set_stream, 0); |
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if (ret < 0) |
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return; |
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dma->cmd = DMA_OUTPUT_COMMAND_DISABLE; |
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dma->notify_dma_done = DMA_OUTPUT_NOTIFY_DMA_DONE_DISABLE; |
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dma->buffer_number = 0; |
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dma->buffer_address = 0; |
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dma->dma_out_mask = 0; |
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fimc_is_set_param_bit(is, PARAM_ISP_DMA2_OUTPUT); |
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__fimc_is_hw_update_param(is, PARAM_ISP_DMA2_OUTPUT); |
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ret = fimc_is_itf_s_param(is, false); |
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if (ret < 0) |
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dev_warn(&is->pdev->dev, "%s: DMA stop failed\n", __func__); |
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fimc_is_hw_set_isp_buf_mask(is, 0); |
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clear_bit(ST_ISP_VID_CAP_BUF_PREP, &isp->state); |
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clear_bit(ST_ISP_VID_CAP_STREAMING, &isp->state); |
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isp->video_capture.buf_count = 0; |
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} |
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static int isp_video_capture_buffer_prepare(struct vb2_buffer *vb) |
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{ |
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struct fimc_isp *isp = vb2_get_drv_priv(vb->vb2_queue); |
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struct fimc_is_video *video = &isp->video_capture; |
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int i; |
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if (video->format == NULL) |
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return -EINVAL; |
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for (i = 0; i < video->format->memplanes; i++) { |
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unsigned long size = video->pixfmt.plane_fmt[i].sizeimage; |
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if (vb2_plane_size(vb, i) < size) { |
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v4l2_err(&video->ve.vdev, |
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"User buffer too small (%ld < %ld)\n", |
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vb2_plane_size(vb, i), size); |
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return -EINVAL; |
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} |
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vb2_set_plane_payload(vb, i, size); |
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} |
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/* Check if we get one of the already known buffers. */ |
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if (test_bit(ST_ISP_VID_CAP_BUF_PREP, &isp->state)) { |
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dma_addr_t dma_addr = vb2_dma_contig_plane_dma_addr(vb, 0); |
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int i; |
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for (i = 0; i < video->buf_count; i++) |
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if (video->buffers[i]->dma_addr[0] == dma_addr) |
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return 0; |
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return -ENXIO; |
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} |
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return 0; |
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} |
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static void isp_video_capture_buffer_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 fimc_isp *isp = vb2_get_drv_priv(vb->vb2_queue); |
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struct fimc_is_video *video = &isp->video_capture; |
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struct fimc_is *is = fimc_isp_to_is(isp); |
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struct isp_video_buf *ivb = to_isp_video_buf(vbuf); |
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unsigned long flags; |
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unsigned int i; |
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if (test_bit(ST_ISP_VID_CAP_BUF_PREP, &isp->state)) { |
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spin_lock_irqsave(&is->slock, flags); |
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video->buf_mask |= BIT(ivb->index); |
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spin_unlock_irqrestore(&is->slock, flags); |
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} else { |
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unsigned int num_planes = video->format->memplanes; |
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ivb->index = video->buf_count; |
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video->buffers[ivb->index] = ivb; |
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for (i = 0; i < num_planes; i++) { |
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int buf_index = ivb->index * num_planes + i; |
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ivb->dma_addr[i] = vb2_dma_contig_plane_dma_addr(vb, i); |
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is->is_p_region->shared[32 + buf_index] = |
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ivb->dma_addr[i]; |
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isp_dbg(2, &video->ve.vdev, |
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"dma_buf %d (%d/%d/%d) addr: %pad\n", |
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buf_index, ivb->index, i, vb->index, |
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&ivb->dma_addr[i]); |
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} |
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if (++video->buf_count < video->reqbufs_count) |
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return; |
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video->buf_mask = (1UL << video->buf_count) - 1; |
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set_bit(ST_ISP_VID_CAP_BUF_PREP, &isp->state); |
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} |
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if (!test_bit(ST_ISP_VID_CAP_STREAMING, &isp->state)) |
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isp_video_capture_start_streaming(vb->vb2_queue, 0); |
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} |
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/* |
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* FIMC-IS ISP input and output DMA interface interrupt handler. |
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* Locking: called with is->slock spinlock held. |
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*/ |
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void fimc_isp_video_irq_handler(struct fimc_is *is) |
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{ |
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struct fimc_is_video *video = &is->isp.video_capture; |
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struct vb2_v4l2_buffer *vbuf; |
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int buf_index; |
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/* TODO: Ensure the DMA is really stopped in stop_streaming callback */ |
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if (!test_bit(ST_ISP_VID_CAP_STREAMING, &is->isp.state)) |
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return; |
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buf_index = (is->i2h_cmd.args[1] - 1) % video->buf_count; |
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vbuf = &video->buffers[buf_index]->vb; |
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vbuf->vb2_buf.timestamp = ktime_get_ns(); |
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vb2_buffer_done(&vbuf->vb2_buf, VB2_BUF_STATE_DONE); |
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video->buf_mask &= ~BIT(buf_index); |
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fimc_is_hw_set_isp_buf_mask(is, video->buf_mask); |
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} |
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static const struct vb2_ops isp_video_capture_qops = { |
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.queue_setup = isp_video_capture_queue_setup, |
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.buf_prepare = isp_video_capture_buffer_prepare, |
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.buf_queue = isp_video_capture_buffer_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 = isp_video_capture_start_streaming, |
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.stop_streaming = isp_video_capture_stop_streaming, |
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}; |
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static int isp_video_open(struct file *file) |
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{ |
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struct fimc_isp *isp = video_drvdata(file); |
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struct exynos_video_entity *ve = &isp->video_capture.ve; |
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struct media_entity *me = &ve->vdev.entity; |
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int ret; |
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if (mutex_lock_interruptible(&isp->video_lock)) |
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return -ERESTARTSYS; |
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ret = v4l2_fh_open(file); |
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if (ret < 0) |
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goto unlock; |
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ret = pm_runtime_get_sync(&isp->pdev->dev); |
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if (ret < 0) |
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goto rel_fh; |
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if (v4l2_fh_is_singular_file(file)) { |
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mutex_lock(&me->graph_obj.mdev->graph_mutex); |
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ret = fimc_pipeline_call(ve, open, me, true); |
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/* Mark the video pipeline as in use. */ |
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if (ret == 0) |
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me->use_count++; |
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mutex_unlock(&me->graph_obj.mdev->graph_mutex); |
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} |
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if (!ret) |
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goto unlock; |
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rel_fh: |
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pm_runtime_put_noidle(&isp->pdev->dev); |
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v4l2_fh_release(file); |
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unlock: |
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mutex_unlock(&isp->video_lock); |
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return ret; |
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} |
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static int isp_video_release(struct file *file) |
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{ |
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struct fimc_isp *isp = video_drvdata(file); |
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struct fimc_is_video *ivc = &isp->video_capture; |
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struct media_entity *entity = &ivc->ve.vdev.entity; |
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struct media_device *mdev = entity->graph_obj.mdev; |
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mutex_lock(&isp->video_lock); |
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if (v4l2_fh_is_singular_file(file) && ivc->streaming) { |
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media_pipeline_stop(entity); |
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ivc->streaming = 0; |
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} |
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_vb2_fop_release(file, NULL); |
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if (v4l2_fh_is_singular_file(file)) { |
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fimc_pipeline_call(&ivc->ve, close); |
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mutex_lock(&mdev->graph_mutex); |
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entity->use_count--; |
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mutex_unlock(&mdev->graph_mutex); |
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} |
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pm_runtime_put(&isp->pdev->dev); |
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mutex_unlock(&isp->video_lock); |
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return 0; |
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} |
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static const struct v4l2_file_operations isp_video_fops = { |
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.owner = THIS_MODULE, |
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.open = isp_video_open, |
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.release = isp_video_release, |
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.poll = vb2_fop_poll, |
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.unlocked_ioctl = video_ioctl2, |
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.mmap = vb2_fop_mmap, |
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}; |
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/* |
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* Video node ioctl operations |
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*/ |
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static int isp_video_querycap(struct file *file, void *priv, |
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struct v4l2_capability *cap) |
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{ |
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struct fimc_isp *isp = video_drvdata(file); |
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__fimc_vidioc_querycap(&isp->pdev->dev, cap); |
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return 0; |
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} |
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static int isp_video_enum_fmt(struct file *file, void *priv, |
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struct v4l2_fmtdesc *f) |
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{ |
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const struct fimc_fmt *fmt; |
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if (f->index >= FIMC_ISP_NUM_FORMATS) |
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return -EINVAL; |
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fmt = fimc_isp_find_format(NULL, NULL, f->index); |
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if (WARN_ON(fmt == NULL)) |
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return -EINVAL; |
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f->pixelformat = fmt->fourcc; |
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return 0; |
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} |
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static int isp_video_g_fmt_mplane(struct file *file, void *fh, |
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struct v4l2_format *f) |
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{ |
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struct fimc_isp *isp = video_drvdata(file); |
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f->fmt.pix_mp = isp->video_capture.pixfmt; |
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return 0; |
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} |
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static void __isp_video_try_fmt(struct fimc_isp *isp, |
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struct v4l2_pix_format_mplane *pixm, |
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const struct fimc_fmt **fmt) |
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{ |
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const struct fimc_fmt *__fmt; |
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__fmt = fimc_isp_find_format(&pixm->pixelformat, NULL, 2); |
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if (fmt) |
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*fmt = __fmt; |
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pixm->colorspace = V4L2_COLORSPACE_SRGB; |
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pixm->field = V4L2_FIELD_NONE; |
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pixm->num_planes = __fmt->memplanes; |
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pixm->pixelformat = __fmt->fourcc; |
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/* |
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* TODO: double check with the docmentation these width/height |
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* constraints are correct. |
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*/ |
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v4l_bound_align_image(&pixm->width, FIMC_ISP_SOURCE_WIDTH_MIN, |
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FIMC_ISP_SOURCE_WIDTH_MAX, 3, |
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&pixm->height, FIMC_ISP_SOURCE_HEIGHT_MIN, |
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FIMC_ISP_SOURCE_HEIGHT_MAX, 0, 0); |
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} |
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static int isp_video_try_fmt_mplane(struct file *file, void *fh, |
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struct v4l2_format *f) |
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{ |
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struct fimc_isp *isp = video_drvdata(file); |
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__isp_video_try_fmt(isp, &f->fmt.pix_mp, NULL); |
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return 0; |
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} |
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static int isp_video_s_fmt_mplane(struct file *file, void *priv, |
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struct v4l2_format *f) |
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{ |
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struct fimc_isp *isp = video_drvdata(file); |
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struct fimc_is *is = fimc_isp_to_is(isp); |
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struct v4l2_pix_format_mplane *pixm = &f->fmt.pix_mp; |
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const struct fimc_fmt *ifmt = NULL; |
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struct param_dma_output *dma = __get_isp_dma2(is); |
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__isp_video_try_fmt(isp, pixm, &ifmt); |
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if (WARN_ON(ifmt == NULL)) |
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return -EINVAL; |
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dma->format = DMA_OUTPUT_FORMAT_BAYER; |
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dma->order = DMA_OUTPUT_ORDER_GB_BG; |
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dma->plane = ifmt->memplanes; |
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dma->bitwidth = ifmt->depth[0]; |
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dma->width = pixm->width; |
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dma->height = pixm->height; |
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fimc_is_mem_barrier(); |
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isp->video_capture.format = ifmt; |
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isp->video_capture.pixfmt = *pixm; |
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return 0; |
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} |
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/* |
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* Check for source/sink format differences at each link. |
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* Return 0 if the formats match or -EPIPE otherwise. |
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*/ |
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static int isp_video_pipeline_validate(struct fimc_isp *isp) |
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{ |
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struct v4l2_subdev *sd = &isp->subdev; |
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struct v4l2_subdev_format sink_fmt, src_fmt; |
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struct media_pad *pad; |
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int ret; |
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while (1) { |
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/* Retrieve format at the sink pad */ |
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pad = &sd->entity.pads[0]; |
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if (!(pad->flags & MEDIA_PAD_FL_SINK)) |
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break; |
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sink_fmt.pad = pad->index; |
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sink_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE; |
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ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &sink_fmt); |
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if (ret < 0 && ret != -ENOIOCTLCMD) |
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return -EPIPE; |
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/* Retrieve format at the source pad */ |
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pad = media_entity_remote_pad(pad); |
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if (!pad || !is_media_entity_v4l2_subdev(pad->entity)) |
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break; |
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sd = media_entity_to_v4l2_subdev(pad->entity); |
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src_fmt.pad = pad->index; |
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src_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE; |
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ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &src_fmt); |
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if (ret < 0 && ret != -ENOIOCTLCMD) |
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return -EPIPE; |
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|
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if (src_fmt.format.width != sink_fmt.format.width || |
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src_fmt.format.height != sink_fmt.format.height || |
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src_fmt.format.code != sink_fmt.format.code) |
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return -EPIPE; |
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} |
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return 0; |
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} |
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static int isp_video_streamon(struct file *file, void *priv, |
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enum v4l2_buf_type type) |
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{ |
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struct fimc_isp *isp = video_drvdata(file); |
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struct exynos_video_entity *ve = &isp->video_capture.ve; |
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struct media_entity *me = &ve->vdev.entity; |
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int ret; |
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ret = media_pipeline_start(me, &ve->pipe->mp); |
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if (ret < 0) |
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return ret; |
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ret = isp_video_pipeline_validate(isp); |
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if (ret < 0) |
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goto p_stop; |
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ret = vb2_ioctl_streamon(file, priv, type); |
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if (ret < 0) |
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goto p_stop; |
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isp->video_capture.streaming = 1; |
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return 0; |
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p_stop: |
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media_pipeline_stop(me); |
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return ret; |
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} |
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|
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static int isp_video_streamoff(struct file *file, void *priv, |
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enum v4l2_buf_type type) |
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{ |
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struct fimc_isp *isp = video_drvdata(file); |
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struct fimc_is_video *video = &isp->video_capture; |
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int ret; |
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ret = vb2_ioctl_streamoff(file, priv, type); |
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if (ret < 0) |
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return ret; |
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media_pipeline_stop(&video->ve.vdev.entity); |
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video->streaming = 0; |
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return 0; |
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} |
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|
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static int isp_video_reqbufs(struct file *file, void *priv, |
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struct v4l2_requestbuffers *rb) |
|
{ |
|
struct fimc_isp *isp = video_drvdata(file); |
|
int ret; |
|
|
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ret = vb2_ioctl_reqbufs(file, priv, rb); |
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if (ret < 0) |
|
return ret; |
|
|
|
if (rb->count && rb->count < FIMC_ISP_REQ_BUFS_MIN) { |
|
rb->count = 0; |
|
vb2_ioctl_reqbufs(file, priv, rb); |
|
ret = -ENOMEM; |
|
} |
|
|
|
isp->video_capture.reqbufs_count = rb->count; |
|
return ret; |
|
} |
|
|
|
static const struct v4l2_ioctl_ops isp_video_ioctl_ops = { |
|
.vidioc_querycap = isp_video_querycap, |
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.vidioc_enum_fmt_vid_cap = isp_video_enum_fmt, |
|
.vidioc_try_fmt_vid_cap_mplane = isp_video_try_fmt_mplane, |
|
.vidioc_s_fmt_vid_cap_mplane = isp_video_s_fmt_mplane, |
|
.vidioc_g_fmt_vid_cap_mplane = isp_video_g_fmt_mplane, |
|
.vidioc_reqbufs = isp_video_reqbufs, |
|
.vidioc_querybuf = vb2_ioctl_querybuf, |
|
.vidioc_prepare_buf = vb2_ioctl_prepare_buf, |
|
.vidioc_create_bufs = vb2_ioctl_create_bufs, |
|
.vidioc_qbuf = vb2_ioctl_qbuf, |
|
.vidioc_dqbuf = vb2_ioctl_dqbuf, |
|
.vidioc_streamon = isp_video_streamon, |
|
.vidioc_streamoff = isp_video_streamoff, |
|
}; |
|
|
|
int fimc_isp_video_device_register(struct fimc_isp *isp, |
|
struct v4l2_device *v4l2_dev, |
|
enum v4l2_buf_type type) |
|
{ |
|
struct vb2_queue *q = &isp->video_capture.vb_queue; |
|
struct fimc_is_video *iv; |
|
struct video_device *vdev; |
|
int ret; |
|
|
|
if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) |
|
iv = &isp->video_capture; |
|
else |
|
return -ENOSYS; |
|
|
|
mutex_init(&isp->video_lock); |
|
INIT_LIST_HEAD(&iv->pending_buf_q); |
|
INIT_LIST_HEAD(&iv->active_buf_q); |
|
iv->format = fimc_isp_find_format(NULL, NULL, 0); |
|
iv->pixfmt.width = IS_DEFAULT_WIDTH; |
|
iv->pixfmt.height = IS_DEFAULT_HEIGHT; |
|
iv->pixfmt.pixelformat = iv->format->fourcc; |
|
iv->pixfmt.colorspace = V4L2_COLORSPACE_SRGB; |
|
iv->reqbufs_count = 0; |
|
|
|
memset(q, 0, sizeof(*q)); |
|
q->type = type; |
|
q->io_modes = VB2_MMAP | VB2_USERPTR; |
|
q->ops = &isp_video_capture_qops; |
|
q->mem_ops = &vb2_dma_contig_memops; |
|
q->buf_struct_size = sizeof(struct isp_video_buf); |
|
q->drv_priv = isp; |
|
q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; |
|
q->lock = &isp->video_lock; |
|
q->dev = &isp->pdev->dev; |
|
|
|
ret = vb2_queue_init(q); |
|
if (ret < 0) |
|
return ret; |
|
|
|
vdev = &iv->ve.vdev; |
|
memset(vdev, 0, sizeof(*vdev)); |
|
strscpy(vdev->name, "fimc-is-isp.capture", sizeof(vdev->name)); |
|
vdev->queue = q; |
|
vdev->fops = &isp_video_fops; |
|
vdev->ioctl_ops = &isp_video_ioctl_ops; |
|
vdev->v4l2_dev = v4l2_dev; |
|
vdev->minor = -1; |
|
vdev->release = video_device_release_empty; |
|
vdev->lock = &isp->video_lock; |
|
vdev->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_CAPTURE_MPLANE; |
|
|
|
iv->pad.flags = MEDIA_PAD_FL_SINK; |
|
ret = media_entity_pads_init(&vdev->entity, 1, &iv->pad); |
|
if (ret < 0) |
|
return ret; |
|
|
|
video_set_drvdata(vdev, isp); |
|
|
|
ret = video_register_device(vdev, VFL_TYPE_VIDEO, -1); |
|
if (ret < 0) { |
|
media_entity_cleanup(&vdev->entity); |
|
return ret; |
|
} |
|
|
|
v4l2_info(v4l2_dev, "Registered %s as /dev/%s\n", |
|
vdev->name, video_device_node_name(vdev)); |
|
|
|
return 0; |
|
} |
|
|
|
void fimc_isp_video_device_unregister(struct fimc_isp *isp, |
|
enum v4l2_buf_type type) |
|
{ |
|
struct exynos_video_entity *ve; |
|
|
|
if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) |
|
ve = &isp->video_capture.ve; |
|
else |
|
return; |
|
|
|
mutex_lock(&isp->video_lock); |
|
|
|
if (video_is_registered(&ve->vdev)) { |
|
video_unregister_device(&ve->vdev); |
|
media_entity_cleanup(&ve->vdev.entity); |
|
ve->pipe = NULL; |
|
} |
|
|
|
mutex_unlock(&isp->video_lock); |
|
}
|
|
|