| /* |
| * ispvideo.c |
| * |
| * TI OMAP3 ISP - Generic video node |
| * |
| * Copyright (C) 2009-2010 Nokia Corporation |
| * |
| * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com> |
| * Sakari Ailus <sakari.ailus@iki.fi> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| |
| #include <asm/cacheflush.h> |
| #include <linux/clk.h> |
| #include <linux/mm.h> |
| #include <linux/module.h> |
| #include <linux/pagemap.h> |
| #include <linux/scatterlist.h> |
| #include <linux/sched.h> |
| #include <linux/slab.h> |
| #include <linux/vmalloc.h> |
| |
| #include <media/v4l2-dev.h> |
| #include <media/v4l2-ioctl.h> |
| #include <media/v4l2-mc.h> |
| #include <media/videobuf2-dma-contig.h> |
| |
| #include "ispvideo.h" |
| #include "isp.h" |
| |
| |
| /* ----------------------------------------------------------------------------- |
| * Helper functions |
| */ |
| |
| /* |
| * NOTE: When adding new media bus codes, always remember to add |
| * corresponding in-memory formats to the table below!!! |
| */ |
| static struct isp_format_info formats[] = { |
| { MEDIA_BUS_FMT_Y8_1X8, MEDIA_BUS_FMT_Y8_1X8, |
| MEDIA_BUS_FMT_Y8_1X8, MEDIA_BUS_FMT_Y8_1X8, |
| V4L2_PIX_FMT_GREY, 8, 1, }, |
| { MEDIA_BUS_FMT_Y10_1X10, MEDIA_BUS_FMT_Y10_1X10, |
| MEDIA_BUS_FMT_Y10_1X10, MEDIA_BUS_FMT_Y8_1X8, |
| V4L2_PIX_FMT_Y10, 10, 2, }, |
| { MEDIA_BUS_FMT_Y12_1X12, MEDIA_BUS_FMT_Y10_1X10, |
| MEDIA_BUS_FMT_Y12_1X12, MEDIA_BUS_FMT_Y8_1X8, |
| V4L2_PIX_FMT_Y12, 12, 2, }, |
| { MEDIA_BUS_FMT_SBGGR8_1X8, MEDIA_BUS_FMT_SBGGR8_1X8, |
| MEDIA_BUS_FMT_SBGGR8_1X8, MEDIA_BUS_FMT_SBGGR8_1X8, |
| V4L2_PIX_FMT_SBGGR8, 8, 1, }, |
| { MEDIA_BUS_FMT_SGBRG8_1X8, MEDIA_BUS_FMT_SGBRG8_1X8, |
| MEDIA_BUS_FMT_SGBRG8_1X8, MEDIA_BUS_FMT_SGBRG8_1X8, |
| V4L2_PIX_FMT_SGBRG8, 8, 1, }, |
| { MEDIA_BUS_FMT_SGRBG8_1X8, MEDIA_BUS_FMT_SGRBG8_1X8, |
| MEDIA_BUS_FMT_SGRBG8_1X8, MEDIA_BUS_FMT_SGRBG8_1X8, |
| V4L2_PIX_FMT_SGRBG8, 8, 1, }, |
| { MEDIA_BUS_FMT_SRGGB8_1X8, MEDIA_BUS_FMT_SRGGB8_1X8, |
| MEDIA_BUS_FMT_SRGGB8_1X8, MEDIA_BUS_FMT_SRGGB8_1X8, |
| V4L2_PIX_FMT_SRGGB8, 8, 1, }, |
| { MEDIA_BUS_FMT_SBGGR10_DPCM8_1X8, MEDIA_BUS_FMT_SBGGR10_DPCM8_1X8, |
| MEDIA_BUS_FMT_SBGGR10_1X10, 0, |
| V4L2_PIX_FMT_SBGGR10DPCM8, 8, 1, }, |
| { MEDIA_BUS_FMT_SGBRG10_DPCM8_1X8, MEDIA_BUS_FMT_SGBRG10_DPCM8_1X8, |
| MEDIA_BUS_FMT_SGBRG10_1X10, 0, |
| V4L2_PIX_FMT_SGBRG10DPCM8, 8, 1, }, |
| { MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8, MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8, |
| MEDIA_BUS_FMT_SGRBG10_1X10, 0, |
| V4L2_PIX_FMT_SGRBG10DPCM8, 8, 1, }, |
| { MEDIA_BUS_FMT_SRGGB10_DPCM8_1X8, MEDIA_BUS_FMT_SRGGB10_DPCM8_1X8, |
| MEDIA_BUS_FMT_SRGGB10_1X10, 0, |
| V4L2_PIX_FMT_SRGGB10DPCM8, 8, 1, }, |
| { MEDIA_BUS_FMT_SBGGR10_1X10, MEDIA_BUS_FMT_SBGGR10_1X10, |
| MEDIA_BUS_FMT_SBGGR10_1X10, MEDIA_BUS_FMT_SBGGR8_1X8, |
| V4L2_PIX_FMT_SBGGR10, 10, 2, }, |
| { MEDIA_BUS_FMT_SGBRG10_1X10, MEDIA_BUS_FMT_SGBRG10_1X10, |
| MEDIA_BUS_FMT_SGBRG10_1X10, MEDIA_BUS_FMT_SGBRG8_1X8, |
| V4L2_PIX_FMT_SGBRG10, 10, 2, }, |
| { MEDIA_BUS_FMT_SGRBG10_1X10, MEDIA_BUS_FMT_SGRBG10_1X10, |
| MEDIA_BUS_FMT_SGRBG10_1X10, MEDIA_BUS_FMT_SGRBG8_1X8, |
| V4L2_PIX_FMT_SGRBG10, 10, 2, }, |
| { MEDIA_BUS_FMT_SRGGB10_1X10, MEDIA_BUS_FMT_SRGGB10_1X10, |
| MEDIA_BUS_FMT_SRGGB10_1X10, MEDIA_BUS_FMT_SRGGB8_1X8, |
| V4L2_PIX_FMT_SRGGB10, 10, 2, }, |
| { MEDIA_BUS_FMT_SBGGR12_1X12, MEDIA_BUS_FMT_SBGGR10_1X10, |
| MEDIA_BUS_FMT_SBGGR12_1X12, MEDIA_BUS_FMT_SBGGR8_1X8, |
| V4L2_PIX_FMT_SBGGR12, 12, 2, }, |
| { MEDIA_BUS_FMT_SGBRG12_1X12, MEDIA_BUS_FMT_SGBRG10_1X10, |
| MEDIA_BUS_FMT_SGBRG12_1X12, MEDIA_BUS_FMT_SGBRG8_1X8, |
| V4L2_PIX_FMT_SGBRG12, 12, 2, }, |
| { MEDIA_BUS_FMT_SGRBG12_1X12, MEDIA_BUS_FMT_SGRBG10_1X10, |
| MEDIA_BUS_FMT_SGRBG12_1X12, MEDIA_BUS_FMT_SGRBG8_1X8, |
| V4L2_PIX_FMT_SGRBG12, 12, 2, }, |
| { MEDIA_BUS_FMT_SRGGB12_1X12, MEDIA_BUS_FMT_SRGGB10_1X10, |
| MEDIA_BUS_FMT_SRGGB12_1X12, MEDIA_BUS_FMT_SRGGB8_1X8, |
| V4L2_PIX_FMT_SRGGB12, 12, 2, }, |
| { MEDIA_BUS_FMT_UYVY8_1X16, MEDIA_BUS_FMT_UYVY8_1X16, |
| MEDIA_BUS_FMT_UYVY8_1X16, 0, |
| V4L2_PIX_FMT_UYVY, 16, 2, }, |
| { MEDIA_BUS_FMT_YUYV8_1X16, MEDIA_BUS_FMT_YUYV8_1X16, |
| MEDIA_BUS_FMT_YUYV8_1X16, 0, |
| V4L2_PIX_FMT_YUYV, 16, 2, }, |
| { MEDIA_BUS_FMT_UYVY8_2X8, MEDIA_BUS_FMT_UYVY8_2X8, |
| MEDIA_BUS_FMT_UYVY8_2X8, 0, |
| V4L2_PIX_FMT_UYVY, 8, 2, }, |
| { MEDIA_BUS_FMT_YUYV8_2X8, MEDIA_BUS_FMT_YUYV8_2X8, |
| MEDIA_BUS_FMT_YUYV8_2X8, 0, |
| V4L2_PIX_FMT_YUYV, 8, 2, }, |
| /* Empty entry to catch the unsupported pixel code (0) used by the CCDC |
| * module and avoid NULL pointer dereferences. |
| */ |
| { 0, } |
| }; |
| |
| const struct isp_format_info *omap3isp_video_format_info(u32 code) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < ARRAY_SIZE(formats); ++i) { |
| if (formats[i].code == code) |
| return &formats[i]; |
| } |
| |
| return NULL; |
| } |
| |
| /* |
| * isp_video_mbus_to_pix - Convert v4l2_mbus_framefmt to v4l2_pix_format |
| * @video: ISP video instance |
| * @mbus: v4l2_mbus_framefmt format (input) |
| * @pix: v4l2_pix_format format (output) |
| * |
| * Fill the output pix structure with information from the input mbus format. |
| * The bytesperline and sizeimage fields are computed from the requested bytes |
| * per line value in the pix format and information from the video instance. |
| * |
| * Return the number of padding bytes at end of line. |
| */ |
| static unsigned int isp_video_mbus_to_pix(const struct isp_video *video, |
| const struct v4l2_mbus_framefmt *mbus, |
| struct v4l2_pix_format *pix) |
| { |
| unsigned int bpl = pix->bytesperline; |
| unsigned int min_bpl; |
| unsigned int i; |
| |
| memset(pix, 0, sizeof(*pix)); |
| pix->width = mbus->width; |
| pix->height = mbus->height; |
| |
| for (i = 0; i < ARRAY_SIZE(formats); ++i) { |
| if (formats[i].code == mbus->code) |
| break; |
| } |
| |
| if (WARN_ON(i == ARRAY_SIZE(formats))) |
| return 0; |
| |
| min_bpl = pix->width * formats[i].bpp; |
| |
| /* Clamp the requested bytes per line value. If the maximum bytes per |
| * line value is zero, the module doesn't support user configurable line |
| * sizes. Override the requested value with the minimum in that case. |
| */ |
| if (video->bpl_max) |
| bpl = clamp(bpl, min_bpl, video->bpl_max); |
| else |
| bpl = min_bpl; |
| |
| if (!video->bpl_zero_padding || bpl != min_bpl) |
| bpl = ALIGN(bpl, video->bpl_alignment); |
| |
| pix->pixelformat = formats[i].pixelformat; |
| pix->bytesperline = bpl; |
| pix->sizeimage = pix->bytesperline * pix->height; |
| pix->colorspace = mbus->colorspace; |
| pix->field = mbus->field; |
| |
| return bpl - min_bpl; |
| } |
| |
| static void isp_video_pix_to_mbus(const struct v4l2_pix_format *pix, |
| struct v4l2_mbus_framefmt *mbus) |
| { |
| unsigned int i; |
| |
| memset(mbus, 0, sizeof(*mbus)); |
| mbus->width = pix->width; |
| mbus->height = pix->height; |
| |
| /* Skip the last format in the loop so that it will be selected if no |
| * match is found. |
| */ |
| for (i = 0; i < ARRAY_SIZE(formats) - 1; ++i) { |
| if (formats[i].pixelformat == pix->pixelformat) |
| break; |
| } |
| |
| mbus->code = formats[i].code; |
| mbus->colorspace = pix->colorspace; |
| mbus->field = pix->field; |
| } |
| |
| static struct v4l2_subdev * |
| isp_video_remote_subdev(struct isp_video *video, u32 *pad) |
| { |
| struct media_pad *remote; |
| |
| remote = media_entity_remote_pad(&video->pad); |
| |
| if (!remote || !is_media_entity_v4l2_subdev(remote->entity)) |
| return NULL; |
| |
| if (pad) |
| *pad = remote->index; |
| |
| return media_entity_to_v4l2_subdev(remote->entity); |
| } |
| |
| /* Return a pointer to the ISP video instance at the far end of the pipeline. */ |
| static int isp_video_get_graph_data(struct isp_video *video, |
| struct isp_pipeline *pipe) |
| { |
| struct media_graph graph; |
| struct media_entity *entity = &video->video.entity; |
| struct media_device *mdev = entity->graph_obj.mdev; |
| struct isp_video *far_end = NULL; |
| int ret; |
| |
| mutex_lock(&mdev->graph_mutex); |
| ret = media_graph_walk_init(&graph, mdev); |
| if (ret) { |
| mutex_unlock(&mdev->graph_mutex); |
| return ret; |
| } |
| |
| media_graph_walk_start(&graph, entity); |
| |
| while ((entity = media_graph_walk_next(&graph))) { |
| struct isp_video *__video; |
| |
| media_entity_enum_set(&pipe->ent_enum, entity); |
| |
| if (far_end != NULL) |
| continue; |
| |
| if (entity == &video->video.entity) |
| continue; |
| |
| if (!is_media_entity_v4l2_video_device(entity)) |
| continue; |
| |
| __video = to_isp_video(media_entity_to_video_device(entity)); |
| if (__video->type != video->type) |
| far_end = __video; |
| } |
| |
| mutex_unlock(&mdev->graph_mutex); |
| |
| media_graph_walk_cleanup(&graph); |
| |
| if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { |
| pipe->input = far_end; |
| pipe->output = video; |
| } else { |
| if (far_end == NULL) |
| return -EPIPE; |
| |
| pipe->input = video; |
| pipe->output = far_end; |
| } |
| |
| return 0; |
| } |
| |
| static int |
| __isp_video_get_format(struct isp_video *video, struct v4l2_format *format) |
| { |
| struct v4l2_subdev_format fmt; |
| struct v4l2_subdev *subdev; |
| u32 pad; |
| int ret; |
| |
| subdev = isp_video_remote_subdev(video, &pad); |
| if (subdev == NULL) |
| return -EINVAL; |
| |
| fmt.pad = pad; |
| fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE; |
| |
| mutex_lock(&video->mutex); |
| ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt); |
| mutex_unlock(&video->mutex); |
| |
| if (ret) |
| return ret; |
| |
| format->type = video->type; |
| return isp_video_mbus_to_pix(video, &fmt.format, &format->fmt.pix); |
| } |
| |
| static int |
| isp_video_check_format(struct isp_video *video, struct isp_video_fh *vfh) |
| { |
| struct v4l2_format format; |
| int ret; |
| |
| memcpy(&format, &vfh->format, sizeof(format)); |
| ret = __isp_video_get_format(video, &format); |
| if (ret < 0) |
| return ret; |
| |
| if (vfh->format.fmt.pix.pixelformat != format.fmt.pix.pixelformat || |
| vfh->format.fmt.pix.height != format.fmt.pix.height || |
| vfh->format.fmt.pix.width != format.fmt.pix.width || |
| vfh->format.fmt.pix.bytesperline != format.fmt.pix.bytesperline || |
| vfh->format.fmt.pix.sizeimage != format.fmt.pix.sizeimage || |
| vfh->format.fmt.pix.field != format.fmt.pix.field) |
| return -EINVAL; |
| |
| return 0; |
| } |
| |
| /* ----------------------------------------------------------------------------- |
| * Video queue operations |
| */ |
| |
| static int isp_video_queue_setup(struct vb2_queue *queue, |
| unsigned int *count, unsigned int *num_planes, |
| unsigned int sizes[], struct device *alloc_devs[]) |
| { |
| struct isp_video_fh *vfh = vb2_get_drv_priv(queue); |
| struct isp_video *video = vfh->video; |
| |
| *num_planes = 1; |
| |
| sizes[0] = vfh->format.fmt.pix.sizeimage; |
| if (sizes[0] == 0) |
| return -EINVAL; |
| |
| *count = min(*count, video->capture_mem / PAGE_ALIGN(sizes[0])); |
| |
| return 0; |
| } |
| |
| static int isp_video_buffer_prepare(struct vb2_buffer *buf) |
| { |
| struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(buf); |
| struct isp_video_fh *vfh = vb2_get_drv_priv(buf->vb2_queue); |
| struct isp_buffer *buffer = to_isp_buffer(vbuf); |
| struct isp_video *video = vfh->video; |
| dma_addr_t addr; |
| |
| /* Refuse to prepare the buffer is the video node has registered an |
| * error. We don't need to take any lock here as the operation is |
| * inherently racy. The authoritative check will be performed in the |
| * queue handler, which can't return an error, this check is just a best |
| * effort to notify userspace as early as possible. |
| */ |
| if (unlikely(video->error)) |
| return -EIO; |
| |
| addr = vb2_dma_contig_plane_dma_addr(buf, 0); |
| if (!IS_ALIGNED(addr, 32)) { |
| dev_dbg(video->isp->dev, |
| "Buffer address must be aligned to 32 bytes boundary.\n"); |
| return -EINVAL; |
| } |
| |
| vb2_set_plane_payload(&buffer->vb.vb2_buf, 0, |
| vfh->format.fmt.pix.sizeimage); |
| buffer->dma = addr; |
| |
| return 0; |
| } |
| |
| /* |
| * isp_video_buffer_queue - Add buffer to streaming queue |
| * @buf: Video buffer |
| * |
| * In memory-to-memory mode, start streaming on the pipeline if buffers are |
| * queued on both the input and the output, if the pipeline isn't already busy. |
| * If the pipeline is busy, it will be restarted in the output module interrupt |
| * handler. |
| */ |
| static void isp_video_buffer_queue(struct vb2_buffer *buf) |
| { |
| struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(buf); |
| struct isp_video_fh *vfh = vb2_get_drv_priv(buf->vb2_queue); |
| struct isp_buffer *buffer = to_isp_buffer(vbuf); |
| struct isp_video *video = vfh->video; |
| struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity); |
| enum isp_pipeline_state state; |
| unsigned long flags; |
| unsigned int empty; |
| unsigned int start; |
| |
| spin_lock_irqsave(&video->irqlock, flags); |
| |
| if (unlikely(video->error)) { |
| vb2_buffer_done(&buffer->vb.vb2_buf, VB2_BUF_STATE_ERROR); |
| spin_unlock_irqrestore(&video->irqlock, flags); |
| return; |
| } |
| |
| empty = list_empty(&video->dmaqueue); |
| list_add_tail(&buffer->irqlist, &video->dmaqueue); |
| |
| spin_unlock_irqrestore(&video->irqlock, flags); |
| |
| if (empty) { |
| if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| state = ISP_PIPELINE_QUEUE_OUTPUT; |
| else |
| state = ISP_PIPELINE_QUEUE_INPUT; |
| |
| spin_lock_irqsave(&pipe->lock, flags); |
| pipe->state |= state; |
| video->ops->queue(video, buffer); |
| video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_QUEUED; |
| |
| start = isp_pipeline_ready(pipe); |
| if (start) |
| pipe->state |= ISP_PIPELINE_STREAM; |
| spin_unlock_irqrestore(&pipe->lock, flags); |
| |
| if (start) |
| omap3isp_pipeline_set_stream(pipe, |
| ISP_PIPELINE_STREAM_SINGLESHOT); |
| } |
| } |
| |
| /* |
| * omap3isp_video_return_buffers - Return all queued buffers to videobuf2 |
| * @video: ISP video object |
| * @state: new state for the returned buffers |
| * |
| * Return all buffers queued on the video node to videobuf2 in the given state. |
| * The buffer state should be VB2_BUF_STATE_QUEUED if called due to an error |
| * when starting the stream, or VB2_BUF_STATE_ERROR otherwise. |
| * |
| * The function must be called with the video irqlock held. |
| */ |
| static void omap3isp_video_return_buffers(struct isp_video *video, |
| enum vb2_buffer_state state) |
| { |
| while (!list_empty(&video->dmaqueue)) { |
| struct isp_buffer *buf; |
| |
| buf = list_first_entry(&video->dmaqueue, |
| struct isp_buffer, irqlist); |
| list_del(&buf->irqlist); |
| vb2_buffer_done(&buf->vb.vb2_buf, state); |
| } |
| } |
| |
| static int isp_video_start_streaming(struct vb2_queue *queue, |
| unsigned int count) |
| { |
| struct isp_video_fh *vfh = vb2_get_drv_priv(queue); |
| struct isp_video *video = vfh->video; |
| struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity); |
| unsigned long flags; |
| int ret; |
| |
| /* In sensor-to-memory mode, the stream can be started synchronously |
| * to the stream on command. In memory-to-memory mode, it will be |
| * started when buffers are queued on both the input and output. |
| */ |
| if (pipe->input) |
| return 0; |
| |
| ret = omap3isp_pipeline_set_stream(pipe, |
| ISP_PIPELINE_STREAM_CONTINUOUS); |
| if (ret < 0) { |
| spin_lock_irqsave(&video->irqlock, flags); |
| omap3isp_video_return_buffers(video, VB2_BUF_STATE_QUEUED); |
| spin_unlock_irqrestore(&video->irqlock, flags); |
| return ret; |
| } |
| |
| spin_lock_irqsave(&video->irqlock, flags); |
| if (list_empty(&video->dmaqueue)) |
| video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN; |
| spin_unlock_irqrestore(&video->irqlock, flags); |
| |
| return 0; |
| } |
| |
| static const struct vb2_ops isp_video_queue_ops = { |
| .queue_setup = isp_video_queue_setup, |
| .buf_prepare = isp_video_buffer_prepare, |
| .buf_queue = isp_video_buffer_queue, |
| .start_streaming = isp_video_start_streaming, |
| }; |
| |
| /* |
| * omap3isp_video_buffer_next - Complete the current buffer and return the next |
| * @video: ISP video object |
| * |
| * Remove the current video buffer from the DMA queue and fill its timestamp and |
| * field count before handing it back to videobuf2. |
| * |
| * For capture video nodes the buffer state is set to VB2_BUF_STATE_DONE if no |
| * error has been flagged in the pipeline, or to VB2_BUF_STATE_ERROR otherwise. |
| * For video output nodes the buffer state is always set to VB2_BUF_STATE_DONE. |
| * |
| * The DMA queue is expected to contain at least one buffer. |
| * |
| * Return a pointer to the next buffer in the DMA queue, or NULL if the queue is |
| * empty. |
| */ |
| struct isp_buffer *omap3isp_video_buffer_next(struct isp_video *video) |
| { |
| struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity); |
| enum vb2_buffer_state vb_state; |
| struct isp_buffer *buf; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&video->irqlock, flags); |
| if (WARN_ON(list_empty(&video->dmaqueue))) { |
| spin_unlock_irqrestore(&video->irqlock, flags); |
| return NULL; |
| } |
| |
| buf = list_first_entry(&video->dmaqueue, struct isp_buffer, |
| irqlist); |
| list_del(&buf->irqlist); |
| spin_unlock_irqrestore(&video->irqlock, flags); |
| |
| buf->vb.vb2_buf.timestamp = ktime_get_ns(); |
| |
| /* Do frame number propagation only if this is the output video node. |
| * Frame number either comes from the CSI receivers or it gets |
| * incremented here if H3A is not active. |
| * Note: There is no guarantee that the output buffer will finish |
| * first, so the input number might lag behind by 1 in some cases. |
| */ |
| if (video == pipe->output && !pipe->do_propagation) |
| buf->vb.sequence = |
| atomic_inc_return(&pipe->frame_number); |
| else |
| buf->vb.sequence = atomic_read(&pipe->frame_number); |
| |
| if (pipe->field != V4L2_FIELD_NONE) |
| buf->vb.sequence /= 2; |
| |
| buf->vb.field = pipe->field; |
| |
| /* Report pipeline errors to userspace on the capture device side. */ |
| if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->error) { |
| vb_state = VB2_BUF_STATE_ERROR; |
| pipe->error = false; |
| } else { |
| vb_state = VB2_BUF_STATE_DONE; |
| } |
| |
| vb2_buffer_done(&buf->vb.vb2_buf, vb_state); |
| |
| spin_lock_irqsave(&video->irqlock, flags); |
| |
| if (list_empty(&video->dmaqueue)) { |
| enum isp_pipeline_state state; |
| |
| spin_unlock_irqrestore(&video->irqlock, flags); |
| |
| if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| state = ISP_PIPELINE_QUEUE_OUTPUT |
| | ISP_PIPELINE_STREAM; |
| else |
| state = ISP_PIPELINE_QUEUE_INPUT |
| | ISP_PIPELINE_STREAM; |
| |
| spin_lock_irqsave(&pipe->lock, flags); |
| pipe->state &= ~state; |
| if (video->pipe.stream_state == ISP_PIPELINE_STREAM_CONTINUOUS) |
| video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN; |
| spin_unlock_irqrestore(&pipe->lock, flags); |
| return NULL; |
| } |
| |
| if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->input != NULL) { |
| spin_lock(&pipe->lock); |
| pipe->state &= ~ISP_PIPELINE_STREAM; |
| spin_unlock(&pipe->lock); |
| } |
| |
| buf = list_first_entry(&video->dmaqueue, struct isp_buffer, |
| irqlist); |
| |
| spin_unlock_irqrestore(&video->irqlock, flags); |
| |
| return buf; |
| } |
| |
| /* |
| * omap3isp_video_cancel_stream - Cancel stream on a video node |
| * @video: ISP video object |
| * |
| * Cancelling a stream returns all buffers queued on the video node to videobuf2 |
| * in the erroneous state and makes sure no new buffer can be queued. |
| */ |
| void omap3isp_video_cancel_stream(struct isp_video *video) |
| { |
| unsigned long flags; |
| |
| spin_lock_irqsave(&video->irqlock, flags); |
| omap3isp_video_return_buffers(video, VB2_BUF_STATE_ERROR); |
| video->error = true; |
| spin_unlock_irqrestore(&video->irqlock, flags); |
| } |
| |
| /* |
| * omap3isp_video_resume - Perform resume operation on the buffers |
| * @video: ISP video object |
| * @continuous: Pipeline is in single shot mode if 0 or continuous mode otherwise |
| * |
| * This function is intended to be used on suspend/resume scenario. It |
| * requests video queue layer to discard buffers marked as DONE if it's in |
| * continuous mode and requests ISP modules to queue again the ACTIVE buffer |
| * if there's any. |
| */ |
| void omap3isp_video_resume(struct isp_video *video, int continuous) |
| { |
| struct isp_buffer *buf = NULL; |
| |
| if (continuous && video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { |
| mutex_lock(&video->queue_lock); |
| vb2_discard_done(video->queue); |
| mutex_unlock(&video->queue_lock); |
| } |
| |
| if (!list_empty(&video->dmaqueue)) { |
| buf = list_first_entry(&video->dmaqueue, |
| struct isp_buffer, irqlist); |
| video->ops->queue(video, buf); |
| video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_QUEUED; |
| } else { |
| if (continuous) |
| video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN; |
| } |
| } |
| |
| /* ----------------------------------------------------------------------------- |
| * V4L2 ioctls |
| */ |
| |
| static int |
| isp_video_querycap(struct file *file, void *fh, struct v4l2_capability *cap) |
| { |
| struct isp_video *video = video_drvdata(file); |
| |
| strscpy(cap->driver, ISP_VIDEO_DRIVER_NAME, sizeof(cap->driver)); |
| strscpy(cap->card, video->video.name, sizeof(cap->card)); |
| strscpy(cap->bus_info, "media", sizeof(cap->bus_info)); |
| |
| cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT |
| | V4L2_CAP_STREAMING | V4L2_CAP_DEVICE_CAPS; |
| |
| if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; |
| else |
| cap->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING; |
| |
| return 0; |
| } |
| |
| static int |
| isp_video_get_format(struct file *file, void *fh, struct v4l2_format *format) |
| { |
| struct isp_video_fh *vfh = to_isp_video_fh(fh); |
| struct isp_video *video = video_drvdata(file); |
| |
| if (format->type != video->type) |
| return -EINVAL; |
| |
| mutex_lock(&video->mutex); |
| *format = vfh->format; |
| mutex_unlock(&video->mutex); |
| |
| return 0; |
| } |
| |
| static int |
| isp_video_set_format(struct file *file, void *fh, struct v4l2_format *format) |
| { |
| struct isp_video_fh *vfh = to_isp_video_fh(fh); |
| struct isp_video *video = video_drvdata(file); |
| struct v4l2_mbus_framefmt fmt; |
| |
| if (format->type != video->type) |
| return -EINVAL; |
| |
| /* Replace unsupported field orders with sane defaults. */ |
| switch (format->fmt.pix.field) { |
| case V4L2_FIELD_NONE: |
| /* Progressive is supported everywhere. */ |
| break; |
| case V4L2_FIELD_ALTERNATE: |
| /* ALTERNATE is not supported on output nodes. */ |
| if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) |
| format->fmt.pix.field = V4L2_FIELD_NONE; |
| break; |
| case V4L2_FIELD_INTERLACED: |
| /* The ISP has no concept of video standard, select the |
| * top-bottom order when the unqualified interlaced order is |
| * requested. |
| */ |
| format->fmt.pix.field = V4L2_FIELD_INTERLACED_TB; |
| /* Fall-through */ |
| case V4L2_FIELD_INTERLACED_TB: |
| case V4L2_FIELD_INTERLACED_BT: |
| /* Interlaced orders are only supported at the CCDC output. */ |
| if (video != &video->isp->isp_ccdc.video_out) |
| format->fmt.pix.field = V4L2_FIELD_NONE; |
| break; |
| case V4L2_FIELD_TOP: |
| case V4L2_FIELD_BOTTOM: |
| case V4L2_FIELD_SEQ_TB: |
| case V4L2_FIELD_SEQ_BT: |
| default: |
| /* All other field orders are currently unsupported, default to |
| * progressive. |
| */ |
| format->fmt.pix.field = V4L2_FIELD_NONE; |
| break; |
| } |
| |
| /* Fill the bytesperline and sizeimage fields by converting to media bus |
| * format and back to pixel format. |
| */ |
| isp_video_pix_to_mbus(&format->fmt.pix, &fmt); |
| isp_video_mbus_to_pix(video, &fmt, &format->fmt.pix); |
| |
| mutex_lock(&video->mutex); |
| vfh->format = *format; |
| mutex_unlock(&video->mutex); |
| |
| return 0; |
| } |
| |
| static int |
| isp_video_try_format(struct file *file, void *fh, struct v4l2_format *format) |
| { |
| struct isp_video *video = video_drvdata(file); |
| struct v4l2_subdev_format fmt; |
| struct v4l2_subdev *subdev; |
| u32 pad; |
| int ret; |
| |
| if (format->type != video->type) |
| return -EINVAL; |
| |
| subdev = isp_video_remote_subdev(video, &pad); |
| if (subdev == NULL) |
| return -EINVAL; |
| |
| isp_video_pix_to_mbus(&format->fmt.pix, &fmt.format); |
| |
| fmt.pad = pad; |
| fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE; |
| ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt); |
| if (ret) |
| return ret == -ENOIOCTLCMD ? -ENOTTY : ret; |
| |
| isp_video_mbus_to_pix(video, &fmt.format, &format->fmt.pix); |
| return 0; |
| } |
| |
| static int |
| isp_video_get_selection(struct file *file, void *fh, struct v4l2_selection *sel) |
| { |
| struct isp_video *video = video_drvdata(file); |
| struct v4l2_subdev_format format; |
| struct v4l2_subdev *subdev; |
| struct v4l2_subdev_selection sdsel = { |
| .which = V4L2_SUBDEV_FORMAT_ACTIVE, |
| .target = sel->target, |
| }; |
| u32 pad; |
| int ret; |
| |
| switch (sel->target) { |
| case V4L2_SEL_TGT_CROP: |
| case V4L2_SEL_TGT_CROP_BOUNDS: |
| case V4L2_SEL_TGT_CROP_DEFAULT: |
| if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) |
| return -EINVAL; |
| break; |
| case V4L2_SEL_TGT_COMPOSE: |
| case V4L2_SEL_TGT_COMPOSE_BOUNDS: |
| case V4L2_SEL_TGT_COMPOSE_DEFAULT: |
| if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| return -EINVAL; |
| break; |
| default: |
| return -EINVAL; |
| } |
| subdev = isp_video_remote_subdev(video, &pad); |
| if (subdev == NULL) |
| return -EINVAL; |
| |
| /* Try the get selection operation first and fallback to get format if not |
| * implemented. |
| */ |
| sdsel.pad = pad; |
| ret = v4l2_subdev_call(subdev, pad, get_selection, NULL, &sdsel); |
| if (!ret) |
| sel->r = sdsel.r; |
| if (ret != -ENOIOCTLCMD) |
| return ret; |
| |
| format.pad = pad; |
| format.which = V4L2_SUBDEV_FORMAT_ACTIVE; |
| ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &format); |
| if (ret < 0) |
| return ret == -ENOIOCTLCMD ? -ENOTTY : ret; |
| |
| sel->r.left = 0; |
| sel->r.top = 0; |
| sel->r.width = format.format.width; |
| sel->r.height = format.format.height; |
| |
| return 0; |
| } |
| |
| static int |
| isp_video_set_selection(struct file *file, void *fh, struct v4l2_selection *sel) |
| { |
| struct isp_video *video = video_drvdata(file); |
| struct v4l2_subdev *subdev; |
| struct v4l2_subdev_selection sdsel = { |
| .which = V4L2_SUBDEV_FORMAT_ACTIVE, |
| .target = sel->target, |
| .flags = sel->flags, |
| .r = sel->r, |
| }; |
| u32 pad; |
| int ret; |
| |
| switch (sel->target) { |
| case V4L2_SEL_TGT_CROP: |
| if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) |
| return -EINVAL; |
| break; |
| case V4L2_SEL_TGT_COMPOSE: |
| if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| return -EINVAL; |
| break; |
| default: |
| return -EINVAL; |
| } |
| subdev = isp_video_remote_subdev(video, &pad); |
| if (subdev == NULL) |
| return -EINVAL; |
| |
| sdsel.pad = pad; |
| mutex_lock(&video->mutex); |
| ret = v4l2_subdev_call(subdev, pad, set_selection, NULL, &sdsel); |
| mutex_unlock(&video->mutex); |
| if (!ret) |
| sel->r = sdsel.r; |
| |
| return ret == -ENOIOCTLCMD ? -ENOTTY : ret; |
| } |
| |
| static int |
| isp_video_get_param(struct file *file, void *fh, struct v4l2_streamparm *a) |
| { |
| struct isp_video_fh *vfh = to_isp_video_fh(fh); |
| struct isp_video *video = video_drvdata(file); |
| |
| if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT || |
| video->type != a->type) |
| return -EINVAL; |
| |
| memset(a, 0, sizeof(*a)); |
| a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; |
| a->parm.output.capability = V4L2_CAP_TIMEPERFRAME; |
| a->parm.output.timeperframe = vfh->timeperframe; |
| |
| return 0; |
| } |
| |
| static int |
| isp_video_set_param(struct file *file, void *fh, struct v4l2_streamparm *a) |
| { |
| struct isp_video_fh *vfh = to_isp_video_fh(fh); |
| struct isp_video *video = video_drvdata(file); |
| |
| if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT || |
| video->type != a->type) |
| return -EINVAL; |
| |
| if (a->parm.output.timeperframe.denominator == 0) |
| a->parm.output.timeperframe.denominator = 1; |
| |
| vfh->timeperframe = a->parm.output.timeperframe; |
| |
| return 0; |
| } |
| |
| static int |
| isp_video_reqbufs(struct file *file, void *fh, struct v4l2_requestbuffers *rb) |
| { |
| struct isp_video_fh *vfh = to_isp_video_fh(fh); |
| struct isp_video *video = video_drvdata(file); |
| int ret; |
| |
| mutex_lock(&video->queue_lock); |
| ret = vb2_reqbufs(&vfh->queue, rb); |
| mutex_unlock(&video->queue_lock); |
| |
| return ret; |
| } |
| |
| static int |
| isp_video_querybuf(struct file *file, void *fh, struct v4l2_buffer *b) |
| { |
| struct isp_video_fh *vfh = to_isp_video_fh(fh); |
| struct isp_video *video = video_drvdata(file); |
| int ret; |
| |
| mutex_lock(&video->queue_lock); |
| ret = vb2_querybuf(&vfh->queue, b); |
| mutex_unlock(&video->queue_lock); |
| |
| return ret; |
| } |
| |
| static int |
| isp_video_qbuf(struct file *file, void *fh, struct v4l2_buffer *b) |
| { |
| struct isp_video_fh *vfh = to_isp_video_fh(fh); |
| struct isp_video *video = video_drvdata(file); |
| int ret; |
| |
| mutex_lock(&video->queue_lock); |
| ret = vb2_qbuf(&vfh->queue, video->video.v4l2_dev->mdev, b); |
| mutex_unlock(&video->queue_lock); |
| |
| return ret; |
| } |
| |
| static int |
| isp_video_dqbuf(struct file *file, void *fh, struct v4l2_buffer *b) |
| { |
| struct isp_video_fh *vfh = to_isp_video_fh(fh); |
| struct isp_video *video = video_drvdata(file); |
| int ret; |
| |
| mutex_lock(&video->queue_lock); |
| ret = vb2_dqbuf(&vfh->queue, b, file->f_flags & O_NONBLOCK); |
| mutex_unlock(&video->queue_lock); |
| |
| return ret; |
| } |
| |
| static int isp_video_check_external_subdevs(struct isp_video *video, |
| struct isp_pipeline *pipe) |
| { |
| struct isp_device *isp = video->isp; |
| struct media_entity *ents[] = { |
| &isp->isp_csi2a.subdev.entity, |
| &isp->isp_csi2c.subdev.entity, |
| &isp->isp_ccp2.subdev.entity, |
| &isp->isp_ccdc.subdev.entity |
| }; |
| struct media_pad *source_pad; |
| struct media_entity *source = NULL; |
| struct media_entity *sink; |
| struct v4l2_subdev_format fmt; |
| struct v4l2_ext_controls ctrls; |
| struct v4l2_ext_control ctrl; |
| unsigned int i; |
| int ret; |
| |
| /* Memory-to-memory pipelines have no external subdev. */ |
| if (pipe->input != NULL) |
| return 0; |
| |
| for (i = 0; i < ARRAY_SIZE(ents); i++) { |
| /* Is the entity part of the pipeline? */ |
| if (!media_entity_enum_test(&pipe->ent_enum, ents[i])) |
| continue; |
| |
| /* ISP entities have always sink pad == 0. Find source. */ |
| source_pad = media_entity_remote_pad(&ents[i]->pads[0]); |
| if (source_pad == NULL) |
| continue; |
| |
| source = source_pad->entity; |
| sink = ents[i]; |
| break; |
| } |
| |
| if (!source) { |
| dev_warn(isp->dev, "can't find source, failing now\n"); |
| return -EINVAL; |
| } |
| |
| if (!is_media_entity_v4l2_subdev(source)) |
| return 0; |
| |
| pipe->external = media_entity_to_v4l2_subdev(source); |
| |
| fmt.pad = source_pad->index; |
| fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE; |
| ret = v4l2_subdev_call(media_entity_to_v4l2_subdev(sink), |
| pad, get_fmt, NULL, &fmt); |
| if (unlikely(ret < 0)) { |
| dev_warn(isp->dev, "get_fmt returned null!\n"); |
| return ret; |
| } |
| |
| pipe->external_width = |
| omap3isp_video_format_info(fmt.format.code)->width; |
| |
| memset(&ctrls, 0, sizeof(ctrls)); |
| memset(&ctrl, 0, sizeof(ctrl)); |
| |
| ctrl.id = V4L2_CID_PIXEL_RATE; |
| |
| ctrls.count = 1; |
| ctrls.controls = &ctrl; |
| |
| ret = v4l2_g_ext_ctrls(pipe->external->ctrl_handler, NULL, &ctrls); |
| if (ret < 0) { |
| dev_warn(isp->dev, "no pixel rate control in subdev %s\n", |
| pipe->external->name); |
| return ret; |
| } |
| |
| pipe->external_rate = ctrl.value64; |
| |
| if (media_entity_enum_test(&pipe->ent_enum, |
| &isp->isp_ccdc.subdev.entity)) { |
| unsigned int rate = UINT_MAX; |
| /* |
| * Check that maximum allowed CCDC pixel rate isn't |
| * exceeded by the pixel rate. |
| */ |
| omap3isp_ccdc_max_rate(&isp->isp_ccdc, &rate); |
| if (pipe->external_rate > rate) |
| return -ENOSPC; |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * Stream management |
| * |
| * Every ISP pipeline has a single input and a single output. The input can be |
| * either a sensor or a video node. The output is always a video node. |
| * |
| * As every pipeline has an output video node, the ISP video objects at the |
| * pipeline output stores the pipeline state. It tracks the streaming state of |
| * both the input and output, as well as the availability of buffers. |
| * |
| * In sensor-to-memory mode, frames are always available at the pipeline input. |
| * Starting the sensor usually requires I2C transfers and must be done in |
| * interruptible context. The pipeline is started and stopped synchronously |
| * to the stream on/off commands. All modules in the pipeline will get their |
| * subdev set stream handler called. The module at the end of the pipeline must |
| * delay starting the hardware until buffers are available at its output. |
| * |
| * In memory-to-memory mode, starting/stopping the stream requires |
| * synchronization between the input and output. ISP modules can't be stopped |
| * in the middle of a frame, and at least some of the modules seem to become |
| * busy as soon as they're started, even if they don't receive a frame start |
| * event. For that reason frames need to be processed in single-shot mode. The |
| * driver needs to wait until a frame is completely processed and written to |
| * memory before restarting the pipeline for the next frame. Pipelined |
| * processing might be possible but requires more testing. |
| * |
| * Stream start must be delayed until buffers are available at both the input |
| * and output. The pipeline must be started in the videobuf queue callback with |
| * the buffers queue spinlock held. The modules subdev set stream operation must |
| * not sleep. |
| */ |
| static int |
| isp_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type) |
| { |
| struct isp_video_fh *vfh = to_isp_video_fh(fh); |
| struct isp_video *video = video_drvdata(file); |
| enum isp_pipeline_state state; |
| struct isp_pipeline *pipe; |
| unsigned long flags; |
| int ret; |
| |
| if (type != video->type) |
| return -EINVAL; |
| |
| mutex_lock(&video->stream_lock); |
| |
| /* Start streaming on the pipeline. No link touching an entity in the |
| * pipeline can be activated or deactivated once streaming is started. |
| */ |
| pipe = video->video.entity.pipe |
| ? to_isp_pipeline(&video->video.entity) : &video->pipe; |
| |
| ret = media_entity_enum_init(&pipe->ent_enum, &video->isp->media_dev); |
| if (ret) |
| goto err_enum_init; |
| |
| /* TODO: Implement PM QoS */ |
| pipe->l3_ick = clk_get_rate(video->isp->clock[ISP_CLK_L3_ICK]); |
| pipe->max_rate = pipe->l3_ick; |
| |
| ret = media_pipeline_start(&video->video.entity, &pipe->pipe); |
| if (ret < 0) |
| goto err_pipeline_start; |
| |
| /* Verify that the currently configured format matches the output of |
| * the connected subdev. |
| */ |
| ret = isp_video_check_format(video, vfh); |
| if (ret < 0) |
| goto err_check_format; |
| |
| video->bpl_padding = ret; |
| video->bpl_value = vfh->format.fmt.pix.bytesperline; |
| |
| ret = isp_video_get_graph_data(video, pipe); |
| if (ret < 0) |
| goto err_check_format; |
| |
| if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| state = ISP_PIPELINE_STREAM_OUTPUT | ISP_PIPELINE_IDLE_OUTPUT; |
| else |
| state = ISP_PIPELINE_STREAM_INPUT | ISP_PIPELINE_IDLE_INPUT; |
| |
| ret = isp_video_check_external_subdevs(video, pipe); |
| if (ret < 0) |
| goto err_check_format; |
| |
| pipe->error = false; |
| |
| spin_lock_irqsave(&pipe->lock, flags); |
| pipe->state &= ~ISP_PIPELINE_STREAM; |
| pipe->state |= state; |
| spin_unlock_irqrestore(&pipe->lock, flags); |
| |
| /* Set the maximum time per frame as the value requested by userspace. |
| * This is a soft limit that can be overridden if the hardware doesn't |
| * support the request limit. |
| */ |
| if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) |
| pipe->max_timeperframe = vfh->timeperframe; |
| |
| video->queue = &vfh->queue; |
| INIT_LIST_HEAD(&video->dmaqueue); |
| atomic_set(&pipe->frame_number, -1); |
| pipe->field = vfh->format.fmt.pix.field; |
| |
| mutex_lock(&video->queue_lock); |
| ret = vb2_streamon(&vfh->queue, type); |
| mutex_unlock(&video->queue_lock); |
| if (ret < 0) |
| goto err_check_format; |
| |
| mutex_unlock(&video->stream_lock); |
| |
| return 0; |
| |
| err_check_format: |
| media_pipeline_stop(&video->video.entity); |
| err_pipeline_start: |
| /* TODO: Implement PM QoS */ |
| /* The DMA queue must be emptied here, otherwise CCDC interrupts that |
| * will get triggered the next time the CCDC is powered up will try to |
| * access buffers that might have been freed but still present in the |
| * DMA queue. This can easily get triggered if the above |
| * omap3isp_pipeline_set_stream() call fails on a system with a |
| * free-running sensor. |
| */ |
| INIT_LIST_HEAD(&video->dmaqueue); |
| video->queue = NULL; |
| |
| media_entity_enum_cleanup(&pipe->ent_enum); |
| |
| err_enum_init: |
| mutex_unlock(&video->stream_lock); |
| |
| return ret; |
| } |
| |
| static int |
| isp_video_streamoff(struct file *file, void *fh, enum v4l2_buf_type type) |
| { |
| struct isp_video_fh *vfh = to_isp_video_fh(fh); |
| struct isp_video *video = video_drvdata(file); |
| struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity); |
| enum isp_pipeline_state state; |
| unsigned int streaming; |
| unsigned long flags; |
| |
| if (type != video->type) |
| return -EINVAL; |
| |
| mutex_lock(&video->stream_lock); |
| |
| /* Make sure we're not streaming yet. */ |
| mutex_lock(&video->queue_lock); |
| streaming = vb2_is_streaming(&vfh->queue); |
| mutex_unlock(&video->queue_lock); |
| |
| if (!streaming) |
| goto done; |
| |
| /* Update the pipeline state. */ |
| if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| state = ISP_PIPELINE_STREAM_OUTPUT |
| | ISP_PIPELINE_QUEUE_OUTPUT; |
| else |
| state = ISP_PIPELINE_STREAM_INPUT |
| | ISP_PIPELINE_QUEUE_INPUT; |
| |
| spin_lock_irqsave(&pipe->lock, flags); |
| pipe->state &= ~state; |
| spin_unlock_irqrestore(&pipe->lock, flags); |
| |
| /* Stop the stream. */ |
| omap3isp_pipeline_set_stream(pipe, ISP_PIPELINE_STREAM_STOPPED); |
| omap3isp_video_cancel_stream(video); |
| |
| mutex_lock(&video->queue_lock); |
| vb2_streamoff(&vfh->queue, type); |
| mutex_unlock(&video->queue_lock); |
| video->queue = NULL; |
| video->error = false; |
| |
| /* TODO: Implement PM QoS */ |
| media_pipeline_stop(&video->video.entity); |
| |
| media_entity_enum_cleanup(&pipe->ent_enum); |
| |
| done: |
| mutex_unlock(&video->stream_lock); |
| return 0; |
| } |
| |
| static int |
| isp_video_enum_input(struct file *file, void *fh, struct v4l2_input *input) |
| { |
| if (input->index > 0) |
| return -EINVAL; |
| |
| strscpy(input->name, "camera", sizeof(input->name)); |
| input->type = V4L2_INPUT_TYPE_CAMERA; |
| |
| return 0; |
| } |
| |
| static int |
| isp_video_g_input(struct file *file, void *fh, unsigned int *input) |
| { |
| *input = 0; |
| |
| return 0; |
| } |
| |
| static int |
| isp_video_s_input(struct file *file, void *fh, unsigned int input) |
| { |
| return input == 0 ? 0 : -EINVAL; |
| } |
| |
| static const struct v4l2_ioctl_ops isp_video_ioctl_ops = { |
| .vidioc_querycap = isp_video_querycap, |
| .vidioc_g_fmt_vid_cap = isp_video_get_format, |
| .vidioc_s_fmt_vid_cap = isp_video_set_format, |
| .vidioc_try_fmt_vid_cap = isp_video_try_format, |
| .vidioc_g_fmt_vid_out = isp_video_get_format, |
| .vidioc_s_fmt_vid_out = isp_video_set_format, |
| .vidioc_try_fmt_vid_out = isp_video_try_format, |
| .vidioc_g_selection = isp_video_get_selection, |
| .vidioc_s_selection = isp_video_set_selection, |
| .vidioc_g_parm = isp_video_get_param, |
| .vidioc_s_parm = isp_video_set_param, |
| .vidioc_reqbufs = isp_video_reqbufs, |
| .vidioc_querybuf = isp_video_querybuf, |
| .vidioc_qbuf = isp_video_qbuf, |
| .vidioc_dqbuf = isp_video_dqbuf, |
| .vidioc_streamon = isp_video_streamon, |
| .vidioc_streamoff = isp_video_streamoff, |
| .vidioc_enum_input = isp_video_enum_input, |
| .vidioc_g_input = isp_video_g_input, |
| .vidioc_s_input = isp_video_s_input, |
| }; |
| |
| /* ----------------------------------------------------------------------------- |
| * V4L2 file operations |
| */ |
| |
| static int isp_video_open(struct file *file) |
| { |
| struct isp_video *video = video_drvdata(file); |
| struct isp_video_fh *handle; |
| struct vb2_queue *queue; |
| int ret = 0; |
| |
| handle = kzalloc(sizeof(*handle), GFP_KERNEL); |
| if (handle == NULL) |
| return -ENOMEM; |
| |
| v4l2_fh_init(&handle->vfh, &video->video); |
| v4l2_fh_add(&handle->vfh); |
| |
| /* If this is the first user, initialise the pipeline. */ |
| if (omap3isp_get(video->isp) == NULL) { |
| ret = -EBUSY; |
| goto done; |
| } |
| |
| ret = v4l2_pipeline_pm_use(&video->video.entity, 1); |
| if (ret < 0) { |
| omap3isp_put(video->isp); |
| goto done; |
| } |
| |
| queue = &handle->queue; |
| queue->type = video->type; |
| queue->io_modes = VB2_MMAP | VB2_USERPTR; |
| queue->drv_priv = handle; |
| queue->ops = &isp_video_queue_ops; |
| queue->mem_ops = &vb2_dma_contig_memops; |
| queue->buf_struct_size = sizeof(struct isp_buffer); |
| queue->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; |
| queue->dev = video->isp->dev; |
| |
| ret = vb2_queue_init(&handle->queue); |
| if (ret < 0) { |
| omap3isp_put(video->isp); |
| goto done; |
| } |
| |
| memset(&handle->format, 0, sizeof(handle->format)); |
| handle->format.type = video->type; |
| handle->timeperframe.denominator = 1; |
| |
| handle->video = video; |
| file->private_data = &handle->vfh; |
| |
| done: |
| if (ret < 0) { |
| v4l2_fh_del(&handle->vfh); |
| v4l2_fh_exit(&handle->vfh); |
| kfree(handle); |
| } |
| |
| return ret; |
| } |
| |
| static int isp_video_release(struct file *file) |
| { |
| struct isp_video *video = video_drvdata(file); |
| struct v4l2_fh *vfh = file->private_data; |
| struct isp_video_fh *handle = to_isp_video_fh(vfh); |
| |
| /* Disable streaming and free the buffers queue resources. */ |
| isp_video_streamoff(file, vfh, video->type); |
| |
| mutex_lock(&video->queue_lock); |
| vb2_queue_release(&handle->queue); |
| mutex_unlock(&video->queue_lock); |
| |
| v4l2_pipeline_pm_use(&video->video.entity, 0); |
| |
| /* Release the file handle. */ |
| v4l2_fh_del(vfh); |
| v4l2_fh_exit(vfh); |
| kfree(handle); |
| file->private_data = NULL; |
| |
| omap3isp_put(video->isp); |
| |
| return 0; |
| } |
| |
| static __poll_t isp_video_poll(struct file *file, poll_table *wait) |
| { |
| struct isp_video_fh *vfh = to_isp_video_fh(file->private_data); |
| struct isp_video *video = video_drvdata(file); |
| __poll_t ret; |
| |
| mutex_lock(&video->queue_lock); |
| ret = vb2_poll(&vfh->queue, file, wait); |
| mutex_unlock(&video->queue_lock); |
| |
| return ret; |
| } |
| |
| static int isp_video_mmap(struct file *file, struct vm_area_struct *vma) |
| { |
| struct isp_video_fh *vfh = to_isp_video_fh(file->private_data); |
| |
| return vb2_mmap(&vfh->queue, vma); |
| } |
| |
| static const struct v4l2_file_operations isp_video_fops = { |
| .owner = THIS_MODULE, |
| .unlocked_ioctl = video_ioctl2, |
| .open = isp_video_open, |
| .release = isp_video_release, |
| .poll = isp_video_poll, |
| .mmap = isp_video_mmap, |
| }; |
| |
| /* ----------------------------------------------------------------------------- |
| * ISP video core |
| */ |
| |
| static const struct isp_video_operations isp_video_dummy_ops = { |
| }; |
| |
| int omap3isp_video_init(struct isp_video *video, const char *name) |
| { |
| const char *direction; |
| int ret; |
| |
| switch (video->type) { |
| case V4L2_BUF_TYPE_VIDEO_CAPTURE: |
| direction = "output"; |
| video->pad.flags = MEDIA_PAD_FL_SINK |
| | MEDIA_PAD_FL_MUST_CONNECT; |
| break; |
| case V4L2_BUF_TYPE_VIDEO_OUTPUT: |
| direction = "input"; |
| video->pad.flags = MEDIA_PAD_FL_SOURCE |
| | MEDIA_PAD_FL_MUST_CONNECT; |
| video->video.vfl_dir = VFL_DIR_TX; |
| break; |
| |
| default: |
| return -EINVAL; |
| } |
| |
| ret = media_entity_pads_init(&video->video.entity, 1, &video->pad); |
| if (ret < 0) |
| return ret; |
| |
| mutex_init(&video->mutex); |
| atomic_set(&video->active, 0); |
| |
| spin_lock_init(&video->pipe.lock); |
| mutex_init(&video->stream_lock); |
| mutex_init(&video->queue_lock); |
| spin_lock_init(&video->irqlock); |
| |
| /* Initialize the video device. */ |
| if (video->ops == NULL) |
| video->ops = &isp_video_dummy_ops; |
| |
| video->video.fops = &isp_video_fops; |
| snprintf(video->video.name, sizeof(video->video.name), |
| "OMAP3 ISP %s %s", name, direction); |
| video->video.vfl_type = VFL_TYPE_GRABBER; |
| video->video.release = video_device_release_empty; |
| video->video.ioctl_ops = &isp_video_ioctl_ops; |
| video->pipe.stream_state = ISP_PIPELINE_STREAM_STOPPED; |
| |
| video_set_drvdata(&video->video, video); |
| |
| return 0; |
| } |
| |
| void omap3isp_video_cleanup(struct isp_video *video) |
| { |
| media_entity_cleanup(&video->video.entity); |
| mutex_destroy(&video->queue_lock); |
| mutex_destroy(&video->stream_lock); |
| mutex_destroy(&video->mutex); |
| } |
| |
| int omap3isp_video_register(struct isp_video *video, struct v4l2_device *vdev) |
| { |
| int ret; |
| |
| video->video.v4l2_dev = vdev; |
| |
| ret = video_register_device(&video->video, VFL_TYPE_GRABBER, -1); |
| if (ret < 0) |
| dev_err(video->isp->dev, |
| "%s: could not register video device (%d)\n", |
| __func__, ret); |
| |
| return ret; |
| } |
| |
| void omap3isp_video_unregister(struct isp_video *video) |
| { |
| if (video_is_registered(&video->video)) |
| video_unregister_device(&video->video); |
| } |