| /* |
| * TI OMAP4 ISS V4L2 Driver - Generic video node |
| * |
| * Copyright (C) 2012 Texas Instruments, Inc. |
| * |
| * Author: Sergio Aguirre <sergio.a.aguirre@gmail.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| */ |
| |
| #include <asm/cacheflush.h> |
| #include <linux/clk.h> |
| #include <linux/mm.h> |
| #include <linux/pagemap.h> |
| #include <linux/sched.h> |
| #include <linux/slab.h> |
| #include <linux/vmalloc.h> |
| #include <linux/module.h> |
| #include <media/v4l2-dev.h> |
| #include <media/v4l2-ioctl.h> |
| |
| #include "iss_video.h" |
| #include "iss.h" |
| |
| /* ----------------------------------------------------------------------------- |
| * Helper functions |
| */ |
| |
| static struct iss_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, "Greyscale 8 bpp", }, |
| { 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, "Greyscale 10 bpp", }, |
| { 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, "Greyscale 12 bpp", }, |
| { 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, "BGGR Bayer 8 bpp", }, |
| { 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, "GBRG Bayer 8 bpp", }, |
| { 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, "GRBG Bayer 8 bpp", }, |
| { 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, "RGGB Bayer 8 bpp", }, |
| { MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8, MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8, |
| MEDIA_BUS_FMT_SGRBG10_1X10, 0, |
| V4L2_PIX_FMT_SGRBG10DPCM8, 8, "GRBG Bayer 10 bpp DPCM8", }, |
| { 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, "BGGR Bayer 10 bpp", }, |
| { 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, "GBRG Bayer 10 bpp", }, |
| { 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, "GRBG Bayer 10 bpp", }, |
| { 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, "RGGB Bayer 10 bpp", }, |
| { 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, "BGGR Bayer 12 bpp", }, |
| { 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, "GBRG Bayer 12 bpp", }, |
| { 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, "GRBG Bayer 12 bpp", }, |
| { 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, "RGGB Bayer 12 bpp", }, |
| { MEDIA_BUS_FMT_UYVY8_1X16, MEDIA_BUS_FMT_UYVY8_1X16, |
| MEDIA_BUS_FMT_UYVY8_1X16, 0, |
| V4L2_PIX_FMT_UYVY, 16, "YUV 4:2:2 (UYVY)", }, |
| { MEDIA_BUS_FMT_YUYV8_1X16, MEDIA_BUS_FMT_YUYV8_1X16, |
| MEDIA_BUS_FMT_YUYV8_1X16, 0, |
| V4L2_PIX_FMT_YUYV, 16, "YUV 4:2:2 (YUYV)", }, |
| { MEDIA_BUS_FMT_YUYV8_1_5X8, MEDIA_BUS_FMT_YUYV8_1_5X8, |
| MEDIA_BUS_FMT_YUYV8_1_5X8, 0, |
| V4L2_PIX_FMT_NV12, 8, "YUV 4:2:0 (NV12)", }, |
| }; |
| |
| const struct iss_format_info * |
| omap4iss_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; |
| } |
| |
| /* |
| * iss_video_mbus_to_pix - Convert v4l2_mbus_framefmt to v4l2_pix_format |
| * @video: ISS 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 iss_video_mbus_to_pix(const struct iss_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; |
| |
| /* 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].code == mbus->code) |
| break; |
| } |
| |
| min_bpl = pix->width * ALIGN(formats[i].bpp, 8) / 8; |
| |
| /* 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; |
| |
| /* FIXME: Special case for NV12! We should make this nicer... */ |
| if (pix->pixelformat == V4L2_PIX_FMT_NV12) |
| pix->sizeimage += (pix->bytesperline * pix->height) / 2; |
| |
| return bpl - min_bpl; |
| } |
| |
| static void iss_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 * |
| iss_video_remote_subdev(struct iss_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 ISS video instance at the far end of the pipeline. */ |
| static struct iss_video * |
| iss_video_far_end(struct iss_video *video) |
| { |
| struct media_entity_graph graph; |
| struct media_entity *entity = &video->video.entity; |
| struct media_device *mdev = entity->graph_obj.mdev; |
| struct iss_video *far_end = NULL; |
| |
| mutex_lock(&mdev->graph_mutex); |
| media_entity_graph_walk_start(&graph, entity); |
| |
| while ((entity = media_entity_graph_walk_next(&graph))) { |
| if (entity == &video->video.entity) |
| continue; |
| |
| if (!is_media_entity_v4l2_io(entity)) |
| continue; |
| |
| far_end = to_iss_video(media_entity_to_video_device(entity)); |
| if (far_end->type != video->type) |
| break; |
| |
| far_end = NULL; |
| } |
| |
| mutex_unlock(&mdev->graph_mutex); |
| return far_end; |
| } |
| |
| static int |
| __iss_video_get_format(struct iss_video *video, |
| struct v4l2_mbus_framefmt *format) |
| { |
| struct v4l2_subdev_format fmt; |
| struct v4l2_subdev *subdev; |
| u32 pad; |
| int ret; |
| |
| subdev = iss_video_remote_subdev(video, &pad); |
| if (!subdev) |
| return -EINVAL; |
| |
| memset(&fmt, 0, sizeof(fmt)); |
| 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 = fmt.format; |
| return 0; |
| } |
| |
| static int |
| iss_video_check_format(struct iss_video *video, struct iss_video_fh *vfh) |
| { |
| struct v4l2_mbus_framefmt format; |
| struct v4l2_pix_format pixfmt; |
| int ret; |
| |
| ret = __iss_video_get_format(video, &format); |
| if (ret < 0) |
| return ret; |
| |
| pixfmt.bytesperline = 0; |
| ret = iss_video_mbus_to_pix(video, &format, &pixfmt); |
| |
| if (vfh->format.fmt.pix.pixelformat != pixfmt.pixelformat || |
| vfh->format.fmt.pix.height != pixfmt.height || |
| vfh->format.fmt.pix.width != pixfmt.width || |
| vfh->format.fmt.pix.bytesperline != pixfmt.bytesperline || |
| vfh->format.fmt.pix.sizeimage != pixfmt.sizeimage) |
| return -EINVAL; |
| |
| return ret; |
| } |
| |
| /* ----------------------------------------------------------------------------- |
| * Video queue operations |
| */ |
| |
| static int iss_video_queue_setup(struct vb2_queue *vq, |
| unsigned int *count, unsigned int *num_planes, |
| unsigned int sizes[], void *alloc_ctxs[]) |
| { |
| struct iss_video_fh *vfh = vb2_get_drv_priv(vq); |
| struct iss_video *video = vfh->video; |
| |
| /* Revisit multi-planar support for NV12 */ |
| *num_planes = 1; |
| |
| sizes[0] = vfh->format.fmt.pix.sizeimage; |
| if (sizes[0] == 0) |
| return -EINVAL; |
| |
| alloc_ctxs[0] = video->alloc_ctx; |
| |
| *count = min(*count, video->capture_mem / PAGE_ALIGN(sizes[0])); |
| |
| return 0; |
| } |
| |
| static void iss_video_buf_cleanup(struct vb2_buffer *vb) |
| { |
| struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); |
| struct iss_buffer *buffer = container_of(vbuf, struct iss_buffer, vb); |
| |
| if (buffer->iss_addr) |
| buffer->iss_addr = 0; |
| } |
| |
| static int iss_video_buf_prepare(struct vb2_buffer *vb) |
| { |
| struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); |
| struct iss_video_fh *vfh = vb2_get_drv_priv(vb->vb2_queue); |
| struct iss_buffer *buffer = container_of(vbuf, struct iss_buffer, vb); |
| struct iss_video *video = vfh->video; |
| unsigned long size = vfh->format.fmt.pix.sizeimage; |
| dma_addr_t addr; |
| |
| if (vb2_plane_size(vb, 0) < size) |
| return -ENOBUFS; |
| |
| addr = vb2_dma_contig_plane_dma_addr(vb, 0); |
| if (!IS_ALIGNED(addr, 32)) { |
| dev_dbg(video->iss->dev, |
| "Buffer address must be aligned to 32 bytes boundary.\n"); |
| return -EINVAL; |
| } |
| |
| vb2_set_plane_payload(vb, 0, size); |
| buffer->iss_addr = addr; |
| return 0; |
| } |
| |
| static void iss_video_buf_queue(struct vb2_buffer *vb) |
| { |
| struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); |
| struct iss_video_fh *vfh = vb2_get_drv_priv(vb->vb2_queue); |
| struct iss_video *video = vfh->video; |
| struct iss_buffer *buffer = container_of(vbuf, struct iss_buffer, vb); |
| struct iss_pipeline *pipe = to_iss_pipeline(&video->video.entity); |
| unsigned long flags; |
| bool empty; |
| |
| spin_lock_irqsave(&video->qlock, flags); |
| |
| /* Mark the buffer is faulty and give it back to the queue immediately |
| * if the video node has registered an error. vb2 will perform the same |
| * check when preparing the buffer, but that is inherently racy, so we |
| * need to handle the race condition with an authoritative check here. |
| */ |
| if (unlikely(video->error)) { |
| vb2_buffer_done(vb, VB2_BUF_STATE_ERROR); |
| spin_unlock_irqrestore(&video->qlock, flags); |
| return; |
| } |
| |
| empty = list_empty(&video->dmaqueue); |
| list_add_tail(&buffer->list, &video->dmaqueue); |
| |
| spin_unlock_irqrestore(&video->qlock, flags); |
| |
| if (empty) { |
| enum iss_pipeline_state state; |
| unsigned int start; |
| |
| if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| state = ISS_PIPELINE_QUEUE_OUTPUT; |
| else |
| state = ISS_PIPELINE_QUEUE_INPUT; |
| |
| spin_lock_irqsave(&pipe->lock, flags); |
| pipe->state |= state; |
| video->ops->queue(video, buffer); |
| video->dmaqueue_flags |= ISS_VIDEO_DMAQUEUE_QUEUED; |
| |
| start = iss_pipeline_ready(pipe); |
| if (start) |
| pipe->state |= ISS_PIPELINE_STREAM; |
| spin_unlock_irqrestore(&pipe->lock, flags); |
| |
| if (start) |
| omap4iss_pipeline_set_stream(pipe, |
| ISS_PIPELINE_STREAM_SINGLESHOT); |
| } |
| } |
| |
| static const struct vb2_ops iss_video_vb2ops = { |
| .queue_setup = iss_video_queue_setup, |
| .buf_prepare = iss_video_buf_prepare, |
| .buf_queue = iss_video_buf_queue, |
| .buf_cleanup = iss_video_buf_cleanup, |
| }; |
| |
| /* |
| * omap4iss_video_buffer_next - Complete the current buffer and return the next |
| * @video: ISS video object |
| * |
| * Remove the current video buffer from the DMA queue and fill its timestamp, |
| * field count and state fields before waking up its completion handler. |
| * |
| * 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. |
| * |
| * 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 iss_buffer *omap4iss_video_buffer_next(struct iss_video *video) |
| { |
| struct iss_pipeline *pipe = to_iss_pipeline(&video->video.entity); |
| enum iss_pipeline_state state; |
| struct iss_buffer *buf; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&video->qlock, flags); |
| if (WARN_ON(list_empty(&video->dmaqueue))) { |
| spin_unlock_irqrestore(&video->qlock, flags); |
| return NULL; |
| } |
| |
| buf = list_first_entry(&video->dmaqueue, struct iss_buffer, |
| list); |
| list_del(&buf->list); |
| spin_unlock_irqrestore(&video->qlock, 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); |
| |
| vb2_buffer_done(&buf->vb.vb2_buf, pipe->error ? |
| VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE); |
| pipe->error = false; |
| |
| spin_lock_irqsave(&video->qlock, flags); |
| if (list_empty(&video->dmaqueue)) { |
| spin_unlock_irqrestore(&video->qlock, flags); |
| if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| state = ISS_PIPELINE_QUEUE_OUTPUT |
| | ISS_PIPELINE_STREAM; |
| else |
| state = ISS_PIPELINE_QUEUE_INPUT |
| | ISS_PIPELINE_STREAM; |
| |
| spin_lock_irqsave(&pipe->lock, flags); |
| pipe->state &= ~state; |
| if (video->pipe.stream_state == ISS_PIPELINE_STREAM_CONTINUOUS) |
| video->dmaqueue_flags |= ISS_VIDEO_DMAQUEUE_UNDERRUN; |
| spin_unlock_irqrestore(&pipe->lock, flags); |
| return NULL; |
| } |
| |
| if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->input) { |
| spin_lock(&pipe->lock); |
| pipe->state &= ~ISS_PIPELINE_STREAM; |
| spin_unlock(&pipe->lock); |
| } |
| |
| buf = list_first_entry(&video->dmaqueue, struct iss_buffer, |
| list); |
| spin_unlock_irqrestore(&video->qlock, flags); |
| buf->vb.vb2_buf.state = VB2_BUF_STATE_ACTIVE; |
| return buf; |
| } |
| |
| /* |
| * omap4iss_video_cancel_stream - Cancel stream on a video node |
| * @video: ISS video object |
| * |
| * Cancelling a stream mark all buffers on the video node as erroneous and makes |
| * sure no new buffer can be queued. |
| */ |
| void omap4iss_video_cancel_stream(struct iss_video *video) |
| { |
| unsigned long flags; |
| |
| spin_lock_irqsave(&video->qlock, flags); |
| |
| while (!list_empty(&video->dmaqueue)) { |
| struct iss_buffer *buf; |
| |
| buf = list_first_entry(&video->dmaqueue, struct iss_buffer, |
| list); |
| list_del(&buf->list); |
| vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); |
| } |
| |
| vb2_queue_error(video->queue); |
| video->error = true; |
| |
| spin_unlock_irqrestore(&video->qlock, flags); |
| } |
| |
| /* ----------------------------------------------------------------------------- |
| * V4L2 ioctls |
| */ |
| |
| static int |
| iss_video_querycap(struct file *file, void *fh, struct v4l2_capability *cap) |
| { |
| struct iss_video *video = video_drvdata(file); |
| |
| strlcpy(cap->driver, ISS_VIDEO_DRIVER_NAME, sizeof(cap->driver)); |
| strlcpy(cap->card, video->video.name, sizeof(cap->card)); |
| strlcpy(cap->bus_info, "media", sizeof(cap->bus_info)); |
| |
| 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; |
| |
| cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_STREAMING |
| | V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT; |
| |
| return 0; |
| } |
| |
| static int |
| iss_video_enum_format(struct file *file, void *fh, struct v4l2_fmtdesc *f) |
| { |
| struct iss_video *video = video_drvdata(file); |
| struct v4l2_mbus_framefmt format; |
| unsigned int index = f->index; |
| unsigned int i; |
| int ret; |
| |
| if (f->type != video->type) |
| return -EINVAL; |
| |
| ret = __iss_video_get_format(video, &format); |
| if (ret < 0) |
| return ret; |
| |
| for (i = 0; i < ARRAY_SIZE(formats); ++i) { |
| const struct iss_format_info *info = &formats[i]; |
| |
| if (format.code != info->code) |
| continue; |
| |
| if (index == 0) { |
| f->pixelformat = info->pixelformat; |
| strlcpy(f->description, info->description, |
| sizeof(f->description)); |
| return 0; |
| } |
| |
| index--; |
| } |
| |
| return -EINVAL; |
| } |
| |
| static int |
| iss_video_get_format(struct file *file, void *fh, struct v4l2_format *format) |
| { |
| struct iss_video_fh *vfh = to_iss_video_fh(fh); |
| struct iss_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 |
| iss_video_set_format(struct file *file, void *fh, struct v4l2_format *format) |
| { |
| struct iss_video_fh *vfh = to_iss_video_fh(fh); |
| struct iss_video *video = video_drvdata(file); |
| struct v4l2_mbus_framefmt fmt; |
| |
| if (format->type != video->type) |
| return -EINVAL; |
| |
| mutex_lock(&video->mutex); |
| |
| /* Fill the bytesperline and sizeimage fields by converting to media bus |
| * format and back to pixel format. |
| */ |
| iss_video_pix_to_mbus(&format->fmt.pix, &fmt); |
| iss_video_mbus_to_pix(video, &fmt, &format->fmt.pix); |
| |
| vfh->format = *format; |
| |
| mutex_unlock(&video->mutex); |
| return 0; |
| } |
| |
| static int |
| iss_video_try_format(struct file *file, void *fh, struct v4l2_format *format) |
| { |
| struct iss_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 = iss_video_remote_subdev(video, &pad); |
| if (!subdev) |
| return -EINVAL; |
| |
| iss_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; |
| |
| iss_video_mbus_to_pix(video, &fmt.format, &format->fmt.pix); |
| return 0; |
| } |
| |
| static int |
| iss_video_get_param(struct file *file, void *fh, struct v4l2_streamparm *a) |
| { |
| struct iss_video_fh *vfh = to_iss_video_fh(fh); |
| struct iss_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 |
| iss_video_set_param(struct file *file, void *fh, struct v4l2_streamparm *a) |
| { |
| struct iss_video_fh *vfh = to_iss_video_fh(fh); |
| struct iss_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 |
| iss_video_reqbufs(struct file *file, void *fh, struct v4l2_requestbuffers *rb) |
| { |
| struct iss_video_fh *vfh = to_iss_video_fh(fh); |
| |
| return vb2_reqbufs(&vfh->queue, rb); |
| } |
| |
| static int |
| iss_video_querybuf(struct file *file, void *fh, struct v4l2_buffer *b) |
| { |
| struct iss_video_fh *vfh = to_iss_video_fh(fh); |
| |
| return vb2_querybuf(&vfh->queue, b); |
| } |
| |
| static int |
| iss_video_qbuf(struct file *file, void *fh, struct v4l2_buffer *b) |
| { |
| struct iss_video_fh *vfh = to_iss_video_fh(fh); |
| |
| return vb2_qbuf(&vfh->queue, b); |
| } |
| |
| static int |
| iss_video_expbuf(struct file *file, void *fh, struct v4l2_exportbuffer *e) |
| { |
| struct iss_video_fh *vfh = to_iss_video_fh(fh); |
| |
| return vb2_expbuf(&vfh->queue, e); |
| } |
| |
| static int |
| iss_video_dqbuf(struct file *file, void *fh, struct v4l2_buffer *b) |
| { |
| struct iss_video_fh *vfh = to_iss_video_fh(fh); |
| |
| return vb2_dqbuf(&vfh->queue, b, file->f_flags & O_NONBLOCK); |
| } |
| |
| /* |
| * Stream management |
| * |
| * Every ISS 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 ISS 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. ISS 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 |
| iss_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type) |
| { |
| struct iss_video_fh *vfh = to_iss_video_fh(fh); |
| struct iss_video *video = video_drvdata(file); |
| struct media_entity_graph graph; |
| struct media_entity *entity; |
| enum iss_pipeline_state state; |
| struct iss_pipeline *pipe; |
| struct iss_video *far_end; |
| 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_iss_pipeline(&video->video.entity) : &video->pipe; |
| pipe->external = NULL; |
| pipe->external_rate = 0; |
| pipe->external_bpp = 0; |
| pipe->entities = 0; |
| |
| if (video->iss->pdata->set_constraints) |
| video->iss->pdata->set_constraints(video->iss, true); |
| |
| ret = media_entity_pipeline_start(&video->video.entity, &pipe->pipe); |
| if (ret < 0) |
| goto err_media_entity_pipeline_start; |
| |
| entity = &video->video.entity; |
| media_entity_graph_walk_start(&graph, entity); |
| while ((entity = media_entity_graph_walk_next(&graph))) |
| pipe->entities |= 1 << media_entity_id(entity); |
| |
| /* Verify that the currently configured format matches the output of |
| * the connected subdev. |
| */ |
| ret = iss_video_check_format(video, vfh); |
| if (ret < 0) |
| goto err_iss_video_check_format; |
| |
| video->bpl_padding = ret; |
| video->bpl_value = vfh->format.fmt.pix.bytesperline; |
| |
| /* Find the ISS video node connected at the far end of the pipeline and |
| * update the pipeline. |
| */ |
| far_end = iss_video_far_end(video); |
| |
| if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { |
| state = ISS_PIPELINE_STREAM_OUTPUT | ISS_PIPELINE_IDLE_OUTPUT; |
| pipe->input = far_end; |
| pipe->output = video; |
| } else { |
| if (!far_end) { |
| ret = -EPIPE; |
| goto err_iss_video_check_format; |
| } |
| |
| state = ISS_PIPELINE_STREAM_INPUT | ISS_PIPELINE_IDLE_INPUT; |
| pipe->input = video; |
| pipe->output = far_end; |
| } |
| |
| spin_lock_irqsave(&pipe->lock, flags); |
| pipe->state &= ~ISS_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); |
| video->error = false; |
| atomic_set(&pipe->frame_number, -1); |
| |
| ret = vb2_streamon(&vfh->queue, type); |
| if (ret < 0) |
| goto err_iss_video_check_format; |
| |
| /* 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) { |
| unsigned long flags; |
| |
| ret = omap4iss_pipeline_set_stream(pipe, |
| ISS_PIPELINE_STREAM_CONTINUOUS); |
| if (ret < 0) |
| goto err_omap4iss_set_stream; |
| spin_lock_irqsave(&video->qlock, flags); |
| if (list_empty(&video->dmaqueue)) |
| video->dmaqueue_flags |= ISS_VIDEO_DMAQUEUE_UNDERRUN; |
| spin_unlock_irqrestore(&video->qlock, flags); |
| } |
| |
| mutex_unlock(&video->stream_lock); |
| return 0; |
| |
| err_omap4iss_set_stream: |
| vb2_streamoff(&vfh->queue, type); |
| err_iss_video_check_format: |
| media_entity_pipeline_stop(&video->video.entity); |
| err_media_entity_pipeline_start: |
| if (video->iss->pdata->set_constraints) |
| video->iss->pdata->set_constraints(video->iss, false); |
| video->queue = NULL; |
| |
| mutex_unlock(&video->stream_lock); |
| return ret; |
| } |
| |
| static int |
| iss_video_streamoff(struct file *file, void *fh, enum v4l2_buf_type type) |
| { |
| struct iss_video_fh *vfh = to_iss_video_fh(fh); |
| struct iss_video *video = video_drvdata(file); |
| struct iss_pipeline *pipe = to_iss_pipeline(&video->video.entity); |
| enum iss_pipeline_state state; |
| unsigned long flags; |
| |
| if (type != video->type) |
| return -EINVAL; |
| |
| mutex_lock(&video->stream_lock); |
| |
| if (!vb2_is_streaming(&vfh->queue)) |
| goto done; |
| |
| /* Update the pipeline state. */ |
| if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| state = ISS_PIPELINE_STREAM_OUTPUT |
| | ISS_PIPELINE_QUEUE_OUTPUT; |
| else |
| state = ISS_PIPELINE_STREAM_INPUT |
| | ISS_PIPELINE_QUEUE_INPUT; |
| |
| spin_lock_irqsave(&pipe->lock, flags); |
| pipe->state &= ~state; |
| spin_unlock_irqrestore(&pipe->lock, flags); |
| |
| /* Stop the stream. */ |
| omap4iss_pipeline_set_stream(pipe, ISS_PIPELINE_STREAM_STOPPED); |
| vb2_streamoff(&vfh->queue, type); |
| video->queue = NULL; |
| |
| if (video->iss->pdata->set_constraints) |
| video->iss->pdata->set_constraints(video->iss, false); |
| media_entity_pipeline_stop(&video->video.entity); |
| |
| done: |
| mutex_unlock(&video->stream_lock); |
| return 0; |
| } |
| |
| static int |
| iss_video_enum_input(struct file *file, void *fh, struct v4l2_input *input) |
| { |
| if (input->index > 0) |
| return -EINVAL; |
| |
| strlcpy(input->name, "camera", sizeof(input->name)); |
| input->type = V4L2_INPUT_TYPE_CAMERA; |
| |
| return 0; |
| } |
| |
| static int |
| iss_video_g_input(struct file *file, void *fh, unsigned int *input) |
| { |
| *input = 0; |
| |
| return 0; |
| } |
| |
| static int |
| iss_video_s_input(struct file *file, void *fh, unsigned int input) |
| { |
| return input == 0 ? 0 : -EINVAL; |
| } |
| |
| static const struct v4l2_ioctl_ops iss_video_ioctl_ops = { |
| .vidioc_querycap = iss_video_querycap, |
| .vidioc_enum_fmt_vid_cap = iss_video_enum_format, |
| .vidioc_g_fmt_vid_cap = iss_video_get_format, |
| .vidioc_s_fmt_vid_cap = iss_video_set_format, |
| .vidioc_try_fmt_vid_cap = iss_video_try_format, |
| .vidioc_g_fmt_vid_out = iss_video_get_format, |
| .vidioc_s_fmt_vid_out = iss_video_set_format, |
| .vidioc_try_fmt_vid_out = iss_video_try_format, |
| .vidioc_g_parm = iss_video_get_param, |
| .vidioc_s_parm = iss_video_set_param, |
| .vidioc_reqbufs = iss_video_reqbufs, |
| .vidioc_querybuf = iss_video_querybuf, |
| .vidioc_qbuf = iss_video_qbuf, |
| .vidioc_expbuf = iss_video_expbuf, |
| .vidioc_dqbuf = iss_video_dqbuf, |
| .vidioc_streamon = iss_video_streamon, |
| .vidioc_streamoff = iss_video_streamoff, |
| .vidioc_enum_input = iss_video_enum_input, |
| .vidioc_g_input = iss_video_g_input, |
| .vidioc_s_input = iss_video_s_input, |
| }; |
| |
| /* ----------------------------------------------------------------------------- |
| * V4L2 file operations |
| */ |
| |
| static int iss_video_open(struct file *file) |
| { |
| struct iss_video *video = video_drvdata(file); |
| struct iss_video_fh *handle; |
| struct vb2_queue *q; |
| int ret = 0; |
| |
| handle = kzalloc(sizeof(*handle), GFP_KERNEL); |
| if (!handle) |
| return -ENOMEM; |
| |
| v4l2_fh_init(&handle->vfh, &video->video); |
| v4l2_fh_add(&handle->vfh); |
| |
| /* If this is the first user, initialise the pipeline. */ |
| if (!omap4iss_get(video->iss)) { |
| ret = -EBUSY; |
| goto done; |
| } |
| |
| ret = omap4iss_pipeline_pm_use(&video->video.entity, 1); |
| if (ret < 0) { |
| omap4iss_put(video->iss); |
| goto done; |
| } |
| |
| video->alloc_ctx = vb2_dma_contig_init_ctx(video->iss->dev); |
| if (IS_ERR(video->alloc_ctx)) { |
| ret = PTR_ERR(video->alloc_ctx); |
| omap4iss_put(video->iss); |
| goto done; |
| } |
| |
| q = &handle->queue; |
| |
| q->type = video->type; |
| q->io_modes = VB2_MMAP | VB2_DMABUF; |
| q->drv_priv = handle; |
| q->ops = &iss_video_vb2ops; |
| q->mem_ops = &vb2_dma_contig_memops; |
| q->buf_struct_size = sizeof(struct iss_buffer); |
| q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; |
| |
| ret = vb2_queue_init(q); |
| if (ret) { |
| omap4iss_put(video->iss); |
| 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); |
| kfree(handle); |
| } |
| |
| return ret; |
| } |
| |
| static int iss_video_release(struct file *file) |
| { |
| struct iss_video *video = video_drvdata(file); |
| struct v4l2_fh *vfh = file->private_data; |
| struct iss_video_fh *handle = to_iss_video_fh(vfh); |
| |
| /* Disable streaming and free the buffers queue resources. */ |
| iss_video_streamoff(file, vfh, video->type); |
| |
| omap4iss_pipeline_pm_use(&video->video.entity, 0); |
| |
| /* Release the videobuf2 queue */ |
| vb2_queue_release(&handle->queue); |
| |
| /* Release the file handle. */ |
| v4l2_fh_del(vfh); |
| kfree(handle); |
| file->private_data = NULL; |
| |
| omap4iss_put(video->iss); |
| |
| return 0; |
| } |
| |
| static unsigned int iss_video_poll(struct file *file, poll_table *wait) |
| { |
| struct iss_video_fh *vfh = to_iss_video_fh(file->private_data); |
| |
| return vb2_poll(&vfh->queue, file, wait); |
| } |
| |
| static int iss_video_mmap(struct file *file, struct vm_area_struct *vma) |
| { |
| struct iss_video_fh *vfh = to_iss_video_fh(file->private_data); |
| |
| return vb2_mmap(&vfh->queue, vma); |
| } |
| |
| static struct v4l2_file_operations iss_video_fops = { |
| .owner = THIS_MODULE, |
| .unlocked_ioctl = video_ioctl2, |
| .open = iss_video_open, |
| .release = iss_video_release, |
| .poll = iss_video_poll, |
| .mmap = iss_video_mmap, |
| }; |
| |
| /* ----------------------------------------------------------------------------- |
| * ISS video core |
| */ |
| |
| static const struct iss_video_operations iss_video_dummy_ops = { |
| }; |
| |
| int omap4iss_video_init(struct iss_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; |
| break; |
| case V4L2_BUF_TYPE_VIDEO_OUTPUT: |
| direction = "input"; |
| video->pad.flags = MEDIA_PAD_FL_SOURCE; |
| break; |
| |
| default: |
| return -EINVAL; |
| } |
| |
| ret = media_entity_pads_init(&video->video.entity, 1, &video->pad); |
| if (ret < 0) |
| return ret; |
| |
| spin_lock_init(&video->qlock); |
| mutex_init(&video->mutex); |
| atomic_set(&video->active, 0); |
| |
| spin_lock_init(&video->pipe.lock); |
| mutex_init(&video->stream_lock); |
| |
| /* Initialize the video device. */ |
| if (!video->ops) |
| video->ops = &iss_video_dummy_ops; |
| |
| video->video.fops = &iss_video_fops; |
| snprintf(video->video.name, sizeof(video->video.name), |
| "OMAP4 ISS %s %s", name, direction); |
| video->video.vfl_type = VFL_TYPE_GRABBER; |
| video->video.release = video_device_release_empty; |
| video->video.ioctl_ops = &iss_video_ioctl_ops; |
| video->pipe.stream_state = ISS_PIPELINE_STREAM_STOPPED; |
| |
| video_set_drvdata(&video->video, video); |
| |
| return 0; |
| } |
| |
| void omap4iss_video_cleanup(struct iss_video *video) |
| { |
| media_entity_cleanup(&video->video.entity); |
| mutex_destroy(&video->stream_lock); |
| mutex_destroy(&video->mutex); |
| } |
| |
| int omap4iss_video_register(struct iss_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->iss->dev, |
| "could not register video device (%d)\n", ret); |
| |
| return ret; |
| } |
| |
| void omap4iss_video_unregister(struct iss_video *video) |
| { |
| video_unregister_device(&video->video); |
| } |