From patchwork Tue Mar 7 14:37:51 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ramiro Oliveira X-Patchwork-Id: 9609065 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 2D2FA60414 for ; Tue, 7 Mar 2017 14:49:28 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 211D826E4F for ; Tue, 7 Mar 2017 14:49:28 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 154B228507; Tue, 7 Mar 2017 14:49:28 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C743326E4F for ; Tue, 7 Mar 2017 14:49:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755307AbdCGOog (ORCPT ); Tue, 7 Mar 2017 09:44:36 -0500 Received: from smtprelay.synopsys.com ([198.182.47.9]:45084 "EHLO smtprelay.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755624AbdCGOns (ORCPT ); Tue, 7 Mar 2017 09:43:48 -0500 Received: from mailhost.synopsys.com (mailhost1.synopsys.com [10.12.238.239]) by smtprelay.synopsys.com (Postfix) with ESMTP id 4039A24E1FA5; Tue, 7 Mar 2017 06:43:19 -0800 (PST) Received: from mailhost.synopsys.com (localhost [127.0.0.1]) by mailhost.synopsys.com (Postfix) with ESMTP id 01FB3188; Tue, 7 Mar 2017 06:43:19 -0800 (PST) Received: from arc-dev.internal.synopsys.com (roliveir-e7470.internal.synopsys.com [10.107.25.136]) by mailhost.synopsys.com (Postfix) with ESMTP id A2030F0; Tue, 7 Mar 2017 06:43:13 -0800 (PST) From: Ramiro Oliveira To: linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, devicetree@vger.kernel.org Cc: CARLOS.PALMINHA@synopsys.com, Ramiro Oliveira , Andrew-CT Chen , Andrew Morton , Arnd Bergmann , Benoit Parrot , "David S. Miller" , Geert Uytterhoeven , Greg Kroah-Hartman , Guenter Roeck , Hans Verkuil , Hugues Fruchet , Jean-Christophe Trotin , Laurent Pinchart , Mark Rutland , Mauro Carvalho Chehab , Minghsiu Tsai , =?UTF-8?q?Niklas=20S=C3=B6derlund?= , Peter Griffin , Rick Chang , Rob Herring , Simon Horman , Songjun Wu , Tiffany Lin Subject: [PATCH 4/4] media: platform: dwc: Support for CSI-2 Host video platform Date: Tue, 7 Mar 2017 14:37:51 +0000 Message-Id: <047a03b285b2b75aec01b82b3cffb58fb47e8339.1488885081.git.roliveir@synopsys.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: References: In-Reply-To: References: Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add support for the CSI-2 Host video platform. This platform exists only to support the Synopsys DW CSI-2 Host bring-up and debug efforts. Signed-off-by: Ramiro Oliveira --- drivers/media/platform/dwc/Kconfig | 40 ++ drivers/media/platform/dwc/Makefile | 2 + drivers/media/platform/dwc/csi_video_device.c | 721 +++++++++++++++++++++++ drivers/media/platform/dwc/csi_video_device.h | 83 +++ drivers/media/platform/dwc/csi_video_plat.c | 818 ++++++++++++++++++++++++++ drivers/media/platform/dwc/csi_video_plat.h | 101 ++++ 6 files changed, 1765 insertions(+) create mode 100644 drivers/media/platform/dwc/csi_video_device.c create mode 100644 drivers/media/platform/dwc/csi_video_device.h create mode 100644 drivers/media/platform/dwc/csi_video_plat.c create mode 100644 drivers/media/platform/dwc/csi_video_plat.h diff --git a/drivers/media/platform/dwc/Kconfig b/drivers/media/platform/dwc/Kconfig index 2cd13d23f897..057208ec3e7b 100644 --- a/drivers/media/platform/dwc/Kconfig +++ b/drivers/media/platform/dwc/Kconfig @@ -1,5 +1,45 @@ +config CSI_VIDEO_PLATFORM + tristate "Designware Cores CSI-2 VIDEO PLATFORM" + select DWC_MIPI_CSI2_HOST + select CSI_VIDEO_DEVICE + depends on VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API && OF && HAS_DMA + help + This a V4L2 driver to support the DesignWare Cores CSI-2 Host Video + Platform. + + To compile this driver as a module, choose M here + +if CSI_VIDEO_PLATFORM + config DWC_MIPI_CSI2_HOST tristate "SNPS DWC MIPI CSI2 Host" select GENERIC_PHY help This is a V4L2 driver for Synopsys Designware MIPI CSI-2 Host. + +config CSI_VIDEO_DEVICE + tristate "DWC VIDEO DEVICE" + depends on CSI_VIDEO_PLATFORM + help + This is a V4L2 driver for the CSI-2 Video platform video device + +choice + prompt "Video Device Videobuf2 mode" + depends on CSI_VIDEO_DEVICE + default VIDEO_DWC_DMA_CONTIG + +config VIDEO_DWC_DMA_CONTIG + bool "Support Videobuf2 DMA CONTIG" + select VIDEOBUF2_DMA_CONTIG + help + Use DMA CONTIG in CSI Video Device + +config VIDEO_DWC_VMALLOC + bool "Support Videobuf2 VMALLOC" + select VIDEOBUF2_VMALLOC + help + Use VMALLOC in CSI Video Device + +endchoice + +endif # CSI2_VIDEO_PLATFORM diff --git a/drivers/media/platform/dwc/Makefile b/drivers/media/platform/dwc/Makefile index 5eb076a55123..ab6f76296b34 100644 --- a/drivers/media/platform/dwc/Makefile +++ b/drivers/media/platform/dwc/Makefile @@ -1 +1,3 @@ +obj-$(CONFIG_CSI_VIDEO_PLATFORM) += csi_video_plat.o obj-$(CONFIG_DWC_MIPI_CSI2_HOST) += dw_mipi_csi.o +obj-$(CONFIG_CSI_VIDEO_DEVICE) += csi_video_device.o diff --git a/drivers/media/platform/dwc/csi_video_device.c b/drivers/media/platform/dwc/csi_video_device.c new file mode 100644 index 000000000000..c319ea6591f3 --- /dev/null +++ b/drivers/media/platform/dwc/csi_video_device.c @@ -0,0 +1,721 @@ +/* + * CSI-2 Video platform video device device driver + * + * Copyright (C) 2016 Synopsys, Inc. All rights reserved. + * Author: Ramiro Oliveira + * + * 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 "csi_video_device.h" + +static const struct plat_csi_fmt vid_dev_formats[] = { + { + .name = "BGR888", + .fourcc = V4L2_PIX_FMT_BGR24, + .depth = 24, + .mbus_code = MEDIA_BUS_FMT_RGB888_2X12_LE, + }, { + .name = "RGB565", + .fourcc = V4L2_PIX_FMT_RGB565, + .depth = 16, + .mbus_code = MEDIA_BUS_FMT_RGB565_2X8_BE, + }, +}; + +static const struct plat_csi_fmt *vid_dev_find_format(struct v4l2_format *f) +{ + const struct plat_csi_fmt *fmt = NULL; + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(vid_dev_formats); ++i) { + fmt = &vid_dev_formats[i]; + if (fmt->fourcc == f->fmt.pix.pixelformat) + return fmt; + } + return NULL; +} + +/* + * Video node ioctl operations + */ +static int +vidioc_querycap(struct file *file, void *priv, struct v4l2_capability *cap) +{ + struct video_device_dev *vid_dev = video_drvdata(file); + + strlcpy(cap->driver, VIDEO_DEVICE_NAME, sizeof(cap->driver)); + strlcpy(cap->card, VIDEO_DEVICE_NAME, sizeof(cap->card)); + snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s", + dev_name(&vid_dev->pdev->dev)); + return 0; +} + +static int +vidioc_enum_fmt_vid_cap(struct file *file, void *priv, struct v4l2_fmtdesc *f) +{ + const struct plat_csi_fmt *p_fmt; + + if (f->index >= ARRAY_SIZE(vid_dev_formats)) + return -EINVAL; + + p_fmt = &vid_dev_formats[f->index]; + + f->pixelformat = p_fmt->fourcc; + + return 0; +} + +static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct video_device_dev *dev = video_drvdata(file); + + f->fmt.pix = dev->format.fmt.pix; + + return 0; +} + +static int +vidioc_try_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f) +{ + const struct plat_csi_fmt *fmt; + + fmt = vid_dev_find_format(f); + if (!fmt) { + f->fmt.pix.pixelformat = V4L2_PIX_FMT_RGB565; + fmt = vid_dev_find_format(f); + } + + f->fmt.pix.field = V4L2_FIELD_NONE; + v4l_bound_align_image(&f->fmt.pix.width, 48, MAX_WIDTH, 2, + &f->fmt.pix.height, 32, MAX_HEIGHT, 0, 0); + + f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3; + f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline; + f->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB; + return 0; +} + +static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct video_device_dev *dev = video_drvdata(file); + int ret; + struct v4l2_subdev_format fmt; + struct v4l2_pix_format *dev_fmt_pix = &dev->format.fmt.pix; + + if (vb2_is_busy(&dev->vb_queue)) + return -EBUSY; + + ret = vidioc_try_fmt_vid_cap(file, dev, f); + if (ret) + return ret; + + dev->fmt = vid_dev_find_format(f); + dev_fmt_pix->pixelformat = f->fmt.pix.pixelformat; + dev_fmt_pix->width = f->fmt.pix.width; + dev_fmt_pix->height = f->fmt.pix.height; + dev_fmt_pix->bytesperline = dev_fmt_pix->width * (dev->fmt->depth / 8); + dev_fmt_pix->sizeimage = + dev_fmt_pix->height * dev_fmt_pix->bytesperline; + + fmt.format.colorspace = V4L2_COLORSPACE_SRGB; + fmt.format.code = dev->fmt->mbus_code; + + fmt.format.width = dev_fmt_pix->width; + fmt.format.height = dev_fmt_pix->height; + + ret = plat_csi_pipeline_call(&dev->ve, set_format, &fmt); + + return 0; +} + +static int vidioc_enum_framesizes(struct file *file, void *fh, + struct v4l2_frmsizeenum *fsize) +{ + static const struct v4l2_frmsize_stepwise sizes = { + 48, MAX_WIDTH, 4, + 32, MAX_HEIGHT, 1 + }; + int i; + + if (fsize->index) + return -EINVAL; + for (i = 0; i < ARRAY_SIZE(vid_dev_formats); i++) + if (vid_dev_formats[i].fourcc == fsize->pixel_format) + break; + if (i == ARRAY_SIZE(vid_dev_formats)) + return -EINVAL; + fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE; + fsize->stepwise = sizes; + return 0; +} + +static int vidioc_enum_input(struct file *file, void *priv, + struct v4l2_input *input) +{ + if (input->index != 0) + return -EINVAL; + + input->type = V4L2_INPUT_TYPE_CAMERA; + input->std = 0; + strcpy(input->name, "Camera"); + + return 0; +} + +static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) +{ + *i = 0; + return 0; +} + +static int vidioc_s_input(struct file *file, void *priv, unsigned int i) +{ + if (i != 0) + return -EINVAL; + return 0; +} + +static int +vid_dev_streamon(struct file *file, void *priv, enum v4l2_buf_type type) +{ + struct video_device_dev *vid_dev = video_drvdata(file); + struct media_entity *entity = &vid_dev->ve.vdev.entity; + int ret; + + ret = media_pipeline_start(entity, &vid_dev->ve.pipe->mp); + if (ret < 0) + return ret; + + vb2_ioctl_streamon(file, priv, type); + if (!ret) + return ret; + + media_pipeline_stop(entity); + return 0; +} + +static int +vid_dev_streamoff(struct file *file, void *priv, enum v4l2_buf_type type) +{ + struct video_device_dev *vid_dev = video_drvdata(file); + int ret; + + ret = vb2_ioctl_streamoff(file, priv, type); + if (ret < 0) + return ret; + + media_pipeline_stop(&vid_dev->ve.vdev.entity); + return 0; +} + +static const struct v4l2_ioctl_ops vid_dev_ioctl_ops = { + .vidioc_querycap = vidioc_querycap, + .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, + .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, + .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, + .vidioc_enum_framesizes = vidioc_enum_framesizes, + .vidioc_enum_input = vidioc_enum_input, + .vidioc_g_input = vidioc_g_input, + .vidioc_s_input = vidioc_s_input, + + .vidioc_reqbufs = vb2_ioctl_reqbufs, + .vidioc_create_bufs = vb2_ioctl_create_bufs, + .vidioc_prepare_buf = vb2_ioctl_prepare_buf, + .vidioc_querybuf = vb2_ioctl_querybuf, + .vidioc_qbuf = vb2_ioctl_qbuf, + .vidioc_dqbuf = vb2_ioctl_dqbuf, + .vidioc_streamon = vid_dev_streamon, + .vidioc_streamoff = vid_dev_streamoff, +}; + +static int +vid_dev_open(struct file *file) +{ + struct video_device_dev *vid_dev = video_drvdata(file); + struct media_entity *me = &vid_dev->ve.vdev.entity; + int ret; + + mutex_lock(&vid_dev->lock); + + ret = v4l2_fh_open(file); + if (ret < 0) + goto unlock; + + if (!v4l2_fh_is_singular_file(file)) + goto unlock; + + mutex_lock(&me->graph_obj.mdev->graph_mutex); + + ret = plat_csi_pipeline_call(&vid_dev->ve, open, me, true); + if (ret == 0) + me->use_count++; + + mutex_unlock(&me->graph_obj.mdev->graph_mutex); + + if (!ret) + goto unlock; + + v4l2_fh_release(file); +unlock: + mutex_unlock(&vid_dev->lock); + return ret; +} + +static int +vid_dev_release(struct file *file) +{ + struct video_device_dev *vid_dev = video_drvdata(file); + struct media_entity *entity = &vid_dev->ve.vdev.entity; + + mutex_lock(&vid_dev->lock); + + if (v4l2_fh_is_singular_file(file)) { + plat_csi_pipeline_call(&vid_dev->ve, close); + mutex_lock(&entity->graph_obj.mdev->graph_mutex); + entity->use_count--; + mutex_unlock(&entity->graph_obj.mdev->graph_mutex); + } + + _vb2_fop_release(file, NULL); + + mutex_unlock(&vid_dev->lock); + return 0; +} + +static const struct v4l2_file_operations vid_dev_fops = { + .owner = THIS_MODULE, + .open = vid_dev_open, + .release = vid_dev_release, + .write = vb2_fop_write, + .read = vb2_fop_read, + .poll = vb2_fop_poll, + .unlocked_ioctl = video_ioctl2, + .mmap = vb2_fop_mmap, +}; + +/* + * VideoBuffer2 operations + */ +#ifdef CONFIG_VIDEO_DWC_DMA_CONTIG +void fill_buffer(struct video_device_dev *dev, struct rx_buffer *buf, + int buf_num, unsigned long flags) +{ + buf->vb.field = dev->format.fmt.pix.field; + buf->vb.sequence++; + buf->vb.vb2_buf.timestamp = ktime_get_ns(); + vb2_set_plane_payload(&buf->vb.vb2_buf, 0, + dev->format.fmt.pix.bytesperline*dev->format.fmt.pix.height); + vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE); +} +#endif + +#ifdef CONFIG_VIDEO_DWC_VMALLOC +static void fill_buffer(struct video_device_dev *dev, struct rx_buffer *buf, + int buf_num, unsigned long flags) +{ + int size = 0; + void *vbuf = NULL; + + if (&buf->vb == NULL) + return; + + size = vb2_plane_size(&buf->vb.vb2_buf, 0); + vbuf = vb2_plane_vaddr(&buf->vb.vb2_buf, 0); + + if (vbuf) { + spin_unlock_irqrestore(&dev->slock, flags); + + memcpy(vbuf, dev->dma_buf[buf_num].cpu_addr, size); + + spin_lock_irqsave(&dev->slock, flags); + + buf->vb.field = dev->format.fmt.pix.field; + buf->vb.sequence++; + buf->vb.vb2_buf.timestamp = ktime_get_ns(); + } + vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE); +} +#endif + +static void buffer_copy_process(void *param) +{ + struct video_device_dev *dev = (struct video_device_dev *) param; + unsigned long flags; + struct dmaqueue *dma_q = &dev->vidq; + struct rx_buffer *buf = NULL; + + spin_lock_irqsave(&dev->slock, flags); + + if (!list_empty(&dma_q->active)) { + buf = list_entry(dma_q->active.next, struct rx_buffer, list); + list_del(&buf->list); + fill_buffer(dev, buf, dev->last_idx, flags); + } + + spin_unlock_irqrestore(&dev->slock, flags); +} + +static inline struct rx_buffer *to_rx_buffer(struct vb2_v4l2_buffer *vb2) +{ + return container_of(vb2, struct rx_buffer, vb); +} + +static int queue_setup(struct vb2_queue *vq, unsigned int *nbuffers, + unsigned int *nplanes, unsigned int sizes[], + struct device *alloc_devs[]) +{ + struct video_device_dev *dev = vb2_get_drv_priv(vq); + unsigned long size = 0; + int i; + + size = dev->format.fmt.pix.sizeimage; + if (size == 0) + return -EINVAL; + + *nbuffers = N_BUFFERS; +#ifdef CONFIG_VIDEO_DWC_VMALLOC + for (i = 0; i < N_BUFFERS; i++) { + dev->dma_buf[i].cpu_addr = dma_alloc_coherent(&dev->pdev->dev, + dev->format.fmt.pix.sizeimage, + &dev->dma_buf[i].dma_addr, + GFP_KERNEL); + } +#endif + *nplanes = 1; + sizes[0] = size; + + return 0; +} + +static int buffer_prepare(struct vb2_buffer *vb) +{ + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); + struct rx_buffer *buf = to_rx_buffer(vbuf); +#ifdef CONFIG_VIDEO_DWC_VMALLOC + int size = 0; + + if (vb == NULL) { + pr_warn("%s:vb2_buffer is null\n", FUNC_NAME); + return 0; + } + + buf = to_rx_buffer(vbuf); + + size = vb2_plane_size(&buf->vb.vb2_buf, 0); + vb2_set_plane_payload(&buf->vb.vb2_buf, 0, size); +#endif + INIT_LIST_HEAD(&buf->list); + return 0; +} + +static void buffer_queue(struct vb2_buffer *vb) +{ + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); + struct video_device_dev *dev = NULL; + struct rx_buffer *buf = NULL; + struct dmaqueue *vidq = NULL; + struct dma_async_tx_descriptor *desc; + u32 flags; + + if (vb == NULL) { + pr_warn("%s:vb2_buffer is null\n", FUNC_NAME); + return; + } + + dev = vb2_get_drv_priv(vb->vb2_queue); + buf = to_rx_buffer(vbuf); + vidq = &dev->vidq; + + flags = DMA_PREP_INTERRUPT | DMA_CTRL_ACK; + dev->xt.dir = DMA_DEV_TO_MEM; + dev->xt.src_sgl = false; + dev->xt.dst_inc = false; + dev->xt.dst_sgl = true; +#ifdef CONFIG_VIDEO_DWC_DMA_CONTIG + dev->xt.dst_start = vb2_dma_contig_plane_dma_addr(vb, 0); +#else + dev->xt.dst_start = dev->dma_buf[dev->idx].dma_addr; +#endif + dev->last_idx = dev->idx; + dev->idx++; + if (dev->idx >= N_BUFFERS) + dev->idx = 0; + + dev->xt.frame_size = 1; + dev->sgl[0].size = dev->format.fmt.pix.bytesperline; + dev->sgl[0].icg = 0; + dev->xt.numf = dev->format.fmt.pix.height; + + desc = dmaengine_prep_interleaved_dma(dev->dma, &dev->xt, flags); + if (!desc) { + pr_err("Failed to prepare DMA transfer\n"); + vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); + return; + } + + desc->callback = buffer_copy_process; + desc->callback_param = dev; + + spin_lock(&dev->slock); + list_add_tail(&buf->list, &vidq->active); + spin_unlock(&dev->slock); + + dmaengine_submit(desc); + + if (vb2_is_streaming(&dev->vb_queue)) + dma_async_issue_pending(dev->dma); +} + +static int start_streaming(struct vb2_queue *vq, unsigned int count) +{ + struct video_device_dev *dev = vb2_get_drv_priv(vq); + + dma_async_issue_pending(dev->dma); + + return 0; +} + +static void stop_streaming(struct vb2_queue *vq) +{ + struct video_device_dev *dev = vb2_get_drv_priv(vq); + struct dmaqueue *dma_q = &dev->vidq; + + /* Stop and reset the DMA engine. */ + dmaengine_terminate_all(dev->dma); + + while (!list_empty(&dma_q->active)) { + struct rx_buffer *buf; + + buf = list_entry(dma_q->active.next, struct rx_buffer, list); + if (buf) { + list_del(&buf->list); + vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); + } + } + list_del_init(&dev->vidq.active); +} + +static const struct vb2_ops vb2_video_qops = { + .queue_setup = queue_setup, + .buf_prepare = buffer_prepare, + .buf_queue = buffer_queue, + .start_streaming = start_streaming, + .stop_streaming = stop_streaming, + .wait_prepare = vb2_ops_wait_prepare, + .wait_finish = vb2_ops_wait_finish, +}; + +static int vid_dev_subdev_registered(struct v4l2_subdev *sd) +{ + struct video_device_dev *vid_dev = v4l2_get_subdevdata(sd); + struct vb2_queue *q = &vid_dev->vb_queue; + struct video_device *vfd = &vid_dev->ve.vdev; + int ret; + + memset(vfd, 0, sizeof(*vfd)); + + strlcpy(vfd->name, VIDEO_DEVICE_NAME, sizeof(vfd->name)); + + vfd->fops = &vid_dev_fops; + vfd->ioctl_ops = &vid_dev_ioctl_ops; + vfd->v4l2_dev = sd->v4l2_dev; + vfd->minor = -1; + vfd->release = video_device_release_empty; + vfd->queue = q; + vfd->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_CAPTURE; + + + INIT_LIST_HEAD(&vid_dev->vidq.active); + init_waitqueue_head(&vid_dev->vidq.wq); + memset(q, 0, sizeof(*q)); + q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + q->io_modes = VB2_MMAP | VB2_USERPTR; + + q->ops = &vb2_video_qops; +#ifdef CONFIG_VIDEO_DWC_DMA_CONTIG + q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_READ; + q->mem_ops = &vb2_dma_contig_memops; +#else + q->mem_ops = &vb2_vmalloc_memops; + q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ; +#endif + q->buf_struct_size = sizeof(struct rx_buffer); + q->drv_priv = vid_dev; + q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; + q->lock = &vid_dev->lock; + q->dev = &vid_dev->pdev->dev; + + ret = vb2_queue_init(q); + if (ret < 0) + return ret; + + vid_dev->vd_pad.flags = MEDIA_PAD_FL_SINK; + ret = media_entity_pads_init(&vfd->entity, 1, &vid_dev->vd_pad); + if (ret < 0) + return ret; + + video_set_drvdata(vfd, vid_dev); + vid_dev->ve.pipe = v4l2_get_subdev_hostdata(sd); + + ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1); + if (ret < 0) { + media_entity_cleanup(&vfd->entity); + vid_dev->ve.pipe = NULL; + return ret; + } + + v4l2_info(sd->v4l2_dev, "Registered %s as /dev/%s\n", + vfd->name, video_device_node_name(vfd)); + return 0; +} + +static void vid_dev_subdev_unregistered(struct v4l2_subdev *sd) +{ + struct video_device_dev *vid_dev = v4l2_get_subdevdata(sd); + + if (vid_dev == NULL) + return; + + mutex_lock(&vid_dev->lock); + + if (video_is_registered(&vid_dev->ve.vdev)) { + video_unregister_device(&vid_dev->ve.vdev); + media_entity_cleanup(&vid_dev->ve.vdev.entity); + vid_dev->ve.pipe = NULL; + } + + mutex_unlock(&vid_dev->lock); +} + +static const struct v4l2_subdev_internal_ops vid_dev_subdev_internal_ops = { + .registered = vid_dev_subdev_registered, + .unregistered = vid_dev_subdev_unregistered, +}; + +static struct v4l2_subdev_ops vid_dev_subdev_ops; + +static int vid_dev_create_capture_subdev(struct video_device_dev *vid_dev) +{ + struct v4l2_subdev *sd = &vid_dev->subdev; + int ret; + + v4l2_subdev_init(sd, &vid_dev_subdev_ops); + sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; + snprintf(sd->name, sizeof(sd->name), "Capture device"); + + vid_dev->subdev_pads[VIDEO_DEV_SD_PAD_SINK_CSI].flags = + MEDIA_PAD_FL_SOURCE; + vid_dev->subdev_pads[VIDEO_DEV_SD_PAD_SOURCE_DMA].flags = + MEDIA_PAD_FL_SINK; + ret = media_entity_pads_init(&sd->entity, VIDEO_DEV_SD_PADS_NUM, + vid_dev->subdev_pads); + if (ret) + return ret; + + sd->internal_ops = &vid_dev_subdev_internal_ops; + sd->owner = THIS_MODULE; + v4l2_set_subdevdata(sd, vid_dev); + + return 0; +} + +static void vid_dev_unregister_subdev(struct video_device_dev *vid_dev) +{ + struct v4l2_subdev *sd = &vid_dev->subdev; + + v4l2_device_unregister_subdev(sd); + media_entity_cleanup(&sd->entity); + v4l2_set_subdevdata(sd, NULL); +} + +static const struct of_device_id vid_dev_of_match[]; + +static int vid_dev_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + const struct of_device_id *of_id; + int ret = 0; + struct video_device_dev *vid_dev; + + dev_dbg(dev, "Installing CSI Video Platform Video Device module\n"); + + if (!dev->of_node) + return -ENODEV; + + vid_dev = devm_kzalloc(dev, sizeof(*vid_dev), GFP_KERNEL); + if (!vid_dev) + return -ENOMEM; + + of_id = of_match_node(vid_dev_of_match, dev->of_node); + if (WARN_ON(of_id == NULL)) + return -EINVAL; + + vid_dev->pdev = pdev; + + spin_lock_init(&vid_dev->slock); + mutex_init(&vid_dev->lock); + + dev_dbg(&pdev->dev, "Requesting DMA\n"); + vid_dev->dma = dma_request_slave_channel(&pdev->dev, "vdma0"); + if (vid_dev->dma == NULL) { + dev_err(&pdev->dev, "no VDMA channel found\n"); + ret = -ENODEV; + goto end; + } + + ret = vid_dev_create_capture_subdev(vid_dev); + if (ret) + goto end; + + platform_set_drvdata(pdev, vid_dev); +#ifdef CONFIG_VIDEO_DWC_DMA_CONTIG + vb2_dma_contig_set_max_seg_size(dev, DMA_BIT_MASK(32)); + dev_info(dev, "VIDEOBUF2 DMA CONTIG\n"); +#else + dev_info(dev, "VIDEOBUF2 VMALLOC\n"); +#endif + dev_info(dev, "Video Device registered successfully\n"); + return 0; +end: + dev_err(dev, "Video Device not registered!!\n"); + return ret; +} + +static int vid_dev_remove(struct platform_device *pdev) +{ + struct video_device_dev *dev = platform_get_drvdata(pdev); + + vid_dev_unregister_subdev(dev); + dev_info(&pdev->dev, "Driver removed\n"); + + return 0; +} + +static const struct of_device_id vid_dev_of_match[] = { + {.compatible = "snps,video-device"}, + {} +}; + +MODULE_DEVICE_TABLE(of, vid_dev_of_match); + +static struct platform_driver __refdata vid_dev_pdrv = { + .remove = vid_dev_remove, + .probe = vid_dev_probe, + .driver = { + .name = VIDEO_DEVICE_NAME, + .owner = THIS_MODULE, + .of_match_table = vid_dev_of_match, + }, +}; + +module_platform_driver(vid_dev_pdrv); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Ramiro Oliveira "); +MODULE_DESCRIPTION("Driver for configuring DMA and Video Device"); diff --git a/drivers/media/platform/dwc/csi_video_device.h b/drivers/media/platform/dwc/csi_video_device.h new file mode 100644 index 000000000000..c924b106ef7b --- /dev/null +++ b/drivers/media/platform/dwc/csi_video_device.h @@ -0,0 +1,83 @@ +/* + * Copyright (C) 2016 Synopsys, Inc. All rights reserved. + * + * 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. + */ + +#ifndef VIDEO_DEVICE_H_ +#define VIDEO_DEVICE_H_ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define N_BUFFERS 3 + +#define VIDEO_DEVICE_NAME "video-device" + +#define FUNC_NAME __func__ + +struct rx_buffer { + /** @short Buffer for video frames */ + struct vb2_v4l2_buffer vb; + struct list_head list; + + dma_addr_t dma_addr; + void *cpu_addr; +}; + +struct dmaqueue { + struct list_head active; + wait_queue_head_t wq; +}; + +/** + * @short Structure to embed device driver information + */ +struct video_device_dev { + struct platform_device *pdev; + struct v4l2_device *v4l2_dev; + struct v4l2_subdev subdev; + struct media_pad vd_pad; + struct media_pad subdev_pads[VIDEO_DEV_SD_PADS_NUM]; + struct mutex lock; + spinlock_t slock; + struct plat_csi_video_entity ve; + struct v4l2_format format; + struct v4l2_pix_format pix_format; + const struct plat_csi_fmt *fmt; + unsigned long *alloc_ctx; + + /* Buffer and DMA */ + struct vb2_queue vb_queue; + int idx; + int last_idx; + struct dmaqueue vidq; + struct rx_buffer dma_buf[N_BUFFERS]; + struct dma_chan *dma; + struct dma_interleaved_template xt; + struct data_chunk sgl[1]; +}; + +#endif /* VIDEO_DEVICE_H_ */ diff --git a/drivers/media/platform/dwc/csi_video_plat.c b/drivers/media/platform/dwc/csi_video_plat.c new file mode 100644 index 000000000000..5bbab1a7c8bc --- /dev/null +++ b/drivers/media/platform/dwc/csi_video_plat.c @@ -0,0 +1,818 @@ +/** + * DWC MIPI CSI-2 Host Video Platform device driver + * + * Based on S5P/EXYNOS4 SoC series camera host interface media device Driver + * Copyright (C) 2011 - 2013 Samsung Electronics Co., Ltd. + * Author: Sylwester Nawrocki + * + * Copyright (C) 2016 Synopsys, Inc. All rights reserved. + * Author: Ramiro Oliveira + * + * 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 "csi_video_plat.h" + +static int +__plat_csi_pipeline_s_format(struct plat_csi_media_pipeline *ep, + struct v4l2_subdev_format *fmt) +{ + + struct plat_csi_pipeline *p = to_plat_csi_pipeline(ep); + static const u8 seq[IDX_MAX] = {IDX_SENSOR, IDX_CSI, IDX_VDEV}; + + fmt->which = V4L2_SUBDEV_FORMAT_ACTIVE; + v4l2_subdev_call(p->subdevs[seq[IDX_CSI]], pad, set_fmt, NULL, fmt); + + return 0; +} + +static void +plat_csi_pipeline_prepare(struct plat_csi_pipeline *p, struct media_entity *me) +{ + struct v4l2_subdev *sd; + unsigned int i = 0; + + for (i = 0; i < IDX_MAX; i++) + p->subdevs[i] = NULL; + + while (1) { + struct media_pad *pad = NULL; + + for (i = 0; i < me->num_pads; i++) { + struct media_pad *spad = &me->pads[i]; + + if (!(spad->flags & MEDIA_PAD_FL_SINK)) + continue; + + pad = media_entity_remote_pad(spad); + if (pad) + break; + } + if (!pad || !is_media_entity_v4l2_subdev(pad->entity)) + break; + + sd = media_entity_to_v4l2_subdev(pad->entity); + + switch (sd->grp_id) { + case GRP_ID_SENSOR: + p->subdevs[IDX_SENSOR] = sd; + break; + case GRP_ID_CSI: + p->subdevs[IDX_CSI] = sd; + break; + case GRP_ID_VIDEODEV: + p->subdevs[IDX_VDEV] = sd; + break; + default: + break; + } + me = &sd->entity; + if (me->num_pads == 1) + break; + } +} + +static int __subdev_set_power(struct v4l2_subdev *sd, int on) +{ + int *use_count; + int ret; + + if (sd == NULL) { + pr_err("null subdev\n"); + return -ENXIO; + } + use_count = &sd->entity.use_count; + if (on && (*use_count)++ > 0) + return 0; + else if (!on && (*use_count == 0 || --(*use_count) > 0)) + return 0; + + ret = v4l2_subdev_call(sd, core, s_power, on); + + return ret != -ENOIOCTLCMD ? ret : 0; +} + +static int plat_csi_pipeline_s_power(struct plat_csi_pipeline *p, bool on) +{ + static const u8 seq[IDX_MAX] = {IDX_CSI, IDX_SENSOR, IDX_VDEV}; + int i, ret = 0; + + for (i = 0; i < IDX_MAX; i++) { + unsigned int idx = seq[i]; + + if (p->subdevs[idx] == NULL) + pr_info("No device registered on %d\n", idx); + else { + ret = __subdev_set_power(p->subdevs[idx], on); + if (ret < 0 && ret != -ENXIO) + goto error; + } + } + return 0; +error: + for (; i >= 0; i--) { + unsigned int idx = seq[i]; + + __subdev_set_power(p->subdevs[idx], !on); + } + return ret; +} + +static int +__plat_csi_pipeline_open(struct plat_csi_media_pipeline *ep, + struct media_entity *me, bool prepare) +{ + struct plat_csi_pipeline *p = to_plat_csi_pipeline(ep); + int ret; + + if (WARN_ON(p == NULL || me == NULL)) + return -EINVAL; + + if (prepare) + plat_csi_pipeline_prepare(p, me); + + ret = plat_csi_pipeline_s_power(p, 1); + if (!ret) + return 0; + + return ret; +} + +static int __plat_csi_pipeline_close(struct plat_csi_media_pipeline *ep) +{ + struct plat_csi_pipeline *p = to_plat_csi_pipeline(ep); + int ret; + + ret = plat_csi_pipeline_s_power(p, 0); + + return ret == -ENXIO ? 0 : ret; +} + +static int +__plat_csi_pipeline_s_stream(struct plat_csi_media_pipeline *ep, bool on) +{ + static const u8 seq[IDX_MAX] = {IDX_SENSOR, IDX_CSI, IDX_VDEV}; + struct plat_csi_pipeline *p = to_plat_csi_pipeline(ep); + int i, ret = 0; + + for (i = 0; i < IDX_MAX; i++) { + unsigned int idx = seq[i]; + + if (p->subdevs[idx] == NULL) + pr_debug("No device registered on %d\n", idx); + else { + ret = + v4l2_subdev_call(p->subdevs[idx], video, s_stream, + on); + + if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV) + goto error; + } + } + return 0; +error: + for (; i >= 0; i--) { + unsigned int idx = seq[i]; + + v4l2_subdev_call(p->subdevs[idx], video, s_stream, !on); + } + return ret; +} + +static const struct plat_csi_media_pipeline_ops plat_csi_pipeline_ops = { + .open = __plat_csi_pipeline_open, + .close = __plat_csi_pipeline_close, + .set_format = __plat_csi_pipeline_s_format, + .set_stream = __plat_csi_pipeline_s_stream, +}; + +static struct plat_csi_media_pipeline * +plat_csi_pipeline_create(struct plat_csi_dev *plat_csi) +{ + struct plat_csi_pipeline *p; + + p = kzalloc(sizeof(*p), GFP_KERNEL); + if (!p) + return NULL; + + list_add_tail(&p->list, &plat_csi->pipelines); + + p->ep.ops = &plat_csi_pipeline_ops; + return &p->ep; +} + +static void +plat_csi_pipelines_free(struct plat_csi_dev *plat_csi) +{ + while (!list_empty(&plat_csi->pipelines)) { + struct plat_csi_pipeline *p; + + p = list_entry(plat_csi->pipelines.next, typeof(*p), list); + list_del(&p->list); + kfree(p); + } +} + +static int +plat_csi_parse_port_node(struct plat_csi_dev *plat_csi, + struct device_node *port, unsigned int index) +{ + struct device_node *rem, *ep; + struct v4l2_of_endpoint endpoint; + struct plat_csi_source_info *pd = &plat_csi->sensor[index].pdata; + + /* Assume here a port node can have only one endpoint node. */ + ep = of_get_next_child(port, NULL); + if (!ep) + return 0; + + v4l2_of_parse_endpoint(ep, &endpoint); + if (WARN_ON(endpoint.base.port == 0) || index >= PLAT_MAX_SENSORS) + return -EINVAL; + + pd->mux_id = endpoint.base.port - 1; + + rem = of_graph_get_remote_port_parent(ep); + of_node_put(ep); + if (rem == NULL) { + dev_info(plat_csi->dev, + "Remote device at %s not found\n", ep->full_name); + return 0; + } + + if (WARN_ON(index >= ARRAY_SIZE(plat_csi->sensor))) + return -EINVAL; + + plat_csi->sensor[index].asd.match_type = V4L2_ASYNC_MATCH_OF; + plat_csi->sensor[index].asd.match.of.node = rem; + plat_csi->async_subdevs[index] = &plat_csi->sensor[index].asd; + + plat_csi->num_sensors++; + + of_node_put(rem); + return 0; +} + + +static int plat_csi_register_sensor_entities(struct plat_csi_dev *plat_csi) +{ + struct device_node *parent = plat_csi->pdev->dev.of_node; + struct device_node *node; + int index = 0; + int ret; + + plat_csi->num_sensors = 0; + + for_each_available_child_of_node(parent, node) { + struct device_node *port; + + if (of_node_cmp(node->name, "csi2")) + continue; + port = of_get_next_child(node, NULL); + if (!port) + continue; + + ret = plat_csi_parse_port_node(plat_csi, port, index); + if (ret < 0) + return ret; + index++; + } + return 0; +} + +static int +__of_get_port_id(struct device_node *np) +{ + u32 reg = 0; + + np = of_get_child_by_name(np, "port"); + if (!np) + return -EINVAL; + of_property_read_u32(np, "reg", ®); + + return reg - 1; +} + +static int register_videodev_entity(struct plat_csi_dev *plat_csi, + struct video_device_dev *vid_dev) +{ + struct v4l2_subdev *sd; + struct plat_csi_media_pipeline *ep; + int ret; + + sd = &vid_dev->subdev; + sd->grp_id = GRP_ID_VIDEODEV; + + ep = plat_csi_pipeline_create(plat_csi); + if (!ep) + return -ENOMEM; + + v4l2_set_subdev_hostdata(sd, ep); + + ret = v4l2_device_register_subdev(&plat_csi->v4l2_dev, sd); + if (!ret) + plat_csi->vid_dev = vid_dev; + else + v4l2_err(&plat_csi->v4l2_dev, + "Failed to register Video Device\n"); + return ret; +} + +static int register_mipi_csi_entity(struct plat_csi_dev *plat_csi, + struct platform_device *pdev, struct v4l2_subdev *sd) +{ + struct device_node *node = pdev->dev.of_node; + int id, ret; + + id = node ? __of_get_port_id(node) : max(0, pdev->id); + + if (WARN_ON(id < 0 || id >= CSI_MAX_ENTITIES)) + return -ENOENT; + + if (WARN_ON(plat_csi->mipi_csi[id].sd)) + return -EBUSY; + + sd->grp_id = GRP_ID_CSI; + ret = v4l2_device_register_subdev(&plat_csi->v4l2_dev, sd); + + if (!ret) + plat_csi->mipi_csi[id].sd = sd; + else + v4l2_err(&plat_csi->v4l2_dev, + "Failed to register MIPI-CSI.%d (%d)\n", id, ret); + return ret; +} + +static int plat_csi_register_platform_entity(struct plat_csi_dev *plat_csi, + struct platform_device *pdev, int plat_entity) +{ + struct device *dev = &pdev->dev; + int ret = -EPROBE_DEFER; + void *drvdata; + + device_lock(dev); + if (!dev->driver || !try_module_get(dev->driver->owner)) + goto dev_unlock; + + drvdata = dev_get_drvdata(dev); + + if (drvdata) { + switch (plat_entity) { + case IDX_VDEV: + ret = register_videodev_entity(plat_csi, drvdata); + break; + case IDX_CSI: + ret = register_mipi_csi_entity(plat_csi, pdev, drvdata); + break; + default: + ret = -ENODEV; + } + } else + dev_err(plat_csi->dev, "%s no drvdata\n", dev_name(dev)); + module_put(dev->driver->owner); +dev_unlock: + device_unlock(dev); + if (ret == -EPROBE_DEFER) + dev_info(plat_csi->dev, + "deferring %s device registration\n", dev_name(dev)); + else if (ret < 0) + dev_err(plat_csi->dev, + "%s device registration failed (%d)\n", dev_name(dev), + ret); + return ret; +} + +static int +plat_csi_register_platform_entities(struct plat_csi_dev *plat_csi, + struct device_node *parent) +{ + struct device_node *node; + int ret = 0; + + for_each_available_child_of_node(parent, node) { + struct platform_device *pdev; + int plat_entity = -1; + + pdev = of_find_device_by_node(node); + if (!pdev) + continue; + + if (!strcmp(node->name, VIDEODEV_OF_NODE_NAME)) + plat_entity = IDX_VDEV; + else if (!strcmp(node->name, CSI_OF_NODE_NAME)) + plat_entity = IDX_CSI; + + if (plat_entity >= 0) + ret = plat_csi_register_platform_entity(plat_csi, pdev, + plat_entity); + put_device(&pdev->dev); + if (ret < 0) + break; + } + + return ret; +} + +static void +plat_csi_unregister_entities(struct plat_csi_dev *plat_csi) +{ + int i; + struct video_device_dev *dev = plat_csi->vid_dev; + + if (dev == NULL) + return; + v4l2_device_unregister_subdev(&dev->subdev); + dev->ve.pipe = NULL; + plat_csi->vid_dev = NULL; + + for (i = 0; i < CSI_MAX_ENTITIES; i++) { + if (plat_csi->mipi_csi[i].sd == NULL) + continue; + v4l2_device_unregister_subdev(plat_csi->mipi_csi[i].sd); + plat_csi->mipi_csi[i].sd = NULL; + } + + dev_info(plat_csi->dev, "Unregistered all entities\n"); +} + +static int +__plat_csi_create_videodev_sink_links(struct plat_csi_dev *plat_csi, + struct media_entity *source, + int pad) +{ + struct media_entity *sink; + int ret = 0; + + if (!plat_csi->vid_dev) + return 0; + + sink = &plat_csi->vid_dev->subdev.entity; + ret = media_create_pad_link(source, pad, sink, + CSI_PAD_SOURCE, MEDIA_LNK_FL_ENABLED); + if (ret) + return ret; + + dev_dbg(plat_csi->dev, "created link [%s] -> [%s]\n", + source->name, sink->name); + + return 0; +} + + +static int +__plat_csi_create_videodev_source_links(struct plat_csi_dev *plat_csi) +{ + struct media_entity *source, *sink; + int ret = 0; + + struct video_device_dev *vid_dev = plat_csi->vid_dev; + + if (vid_dev == NULL) + return -ENODEV; + + source = &vid_dev->subdev.entity; + sink = &vid_dev->ve.vdev.entity; + + ret = media_create_pad_link(source, VIDEO_DEV_SD_PAD_SOURCE_DMA, + sink, 0, MEDIA_LNK_FL_ENABLED); + + dev_dbg(plat_csi->dev, "created link [%s] -> [%s]\n", + source->name, sink->name); + return ret; +} + +static int +plat_csi_create_links(struct plat_csi_dev *plat_csi) +{ + struct v4l2_subdev *csi_sensor[CSI_MAX_ENTITIES] = { NULL }; + struct v4l2_subdev *sensor, *csi; + struct media_entity *source; + struct plat_csi_source_info *pdata; + int i, pad, ret = 0; + + for (i = 0; i < plat_csi->num_sensors; i++) { + if (plat_csi->sensor[i].subdev == NULL) + continue; + + sensor = plat_csi->sensor[i].subdev; + pdata = v4l2_get_subdev_hostdata(sensor); + if (!pdata) + continue; + + source = NULL; + + csi = plat_csi->mipi_csi[pdata->mux_id].sd; + if (WARN(csi == NULL, "dw-mipi-csi module is not loaded!\n")) + return -EINVAL; + + pad = sensor->entity.num_pads - 1; + ret = media_create_pad_link(&sensor->entity, pad, + &csi->entity, CSI_PAD_SINK, + MEDIA_LNK_FL_IMMUTABLE | + MEDIA_LNK_FL_ENABLED); + + if (ret) + return ret; + dev_dbg(plat_csi->dev, "created link [%s] -> [%s]\n", + sensor->entity.name, csi->entity.name); + + csi_sensor[pdata->mux_id] = sensor; + } + + for (i = 0; i < CSI_MAX_ENTITIES; i++) { + if (plat_csi->mipi_csi[i].sd == NULL) { + dev_info(plat_csi->dev, "no link\n"); + continue; + } + + source = &plat_csi->mipi_csi[i].sd->entity; + pad = VIDEO_DEV_SD_PAD_SINK_CSI; + + ret = __plat_csi_create_videodev_sink_links(plat_csi, source, + pad); + } + + ret = __plat_csi_create_videodev_source_links(plat_csi); + if (ret < 0) + return ret; + + return ret; +} + +static int __plat_csi_modify_pipeline(struct media_entity *entity, bool enable) +{ + struct plat_csi_video_entity *ve; + struct plat_csi_pipeline *p; + struct video_device *vdev; + int ret; + + vdev = media_entity_to_video_device(entity); + + if (vdev->entity.use_count == 0) + return 0; + + ve = vdev_to_plat_csi_video_entity(vdev); + p = to_plat_csi_pipeline(ve->pipe); + + if (enable) + ret = __plat_csi_pipeline_open(ve->pipe, entity, true); + else + ret = __plat_csi_pipeline_close(ve->pipe); + + if (ret == 0 && !enable) + memset(p->subdevs, 0, sizeof(p->subdevs)); + + return ret; +} + + +static int +__plat_csi_modify_pipelines(struct media_entity *entity, bool enable, + struct media_graph *graph) +{ + struct media_entity *entity_err = entity; + int ret; + + media_graph_walk_start(graph, entity); + + while ((entity = media_graph_walk_next(graph))) { + if (!is_media_entity_v4l2_video_device(entity)) + continue; + + ret = __plat_csi_modify_pipeline(entity, enable); + + if (ret < 0) + goto err; + } + + return 0; + +err: + media_graph_walk_start(graph, entity_err); + + while ((entity_err = media_graph_walk_next(graph))) { + if (!is_media_entity_v4l2_video_device(entity_err)) + continue; + + __plat_csi_modify_pipeline(entity_err, !enable); + + if (entity_err == entity) + break; + } + + return ret; +} + +static int +plat_csi_link_notify(struct media_link *link, unsigned int flags, + unsigned int notification) +{ + struct media_graph *graph = + &container_of(link->graph_obj.mdev, struct plat_csi_dev, + media_dev)->link_setup_graph; + struct media_entity *sink = link->sink->entity; + int ret = 0; + + if (notification == MEDIA_DEV_NOTIFY_PRE_LINK_CH) { + ret = media_graph_walk_init(graph, link->graph_obj.mdev); + if (ret) + return ret; + if (!(flags & MEDIA_LNK_FL_ENABLED)) + ret = __plat_csi_modify_pipelines(sink, false, graph); + + } else if (notification == MEDIA_DEV_NOTIFY_POST_LINK_CH) { + if (link->flags & MEDIA_LNK_FL_ENABLED) + ret = __plat_csi_modify_pipelines(sink, true, graph); + media_graph_walk_cleanup(graph); + } + + return ret ? -EPIPE : 0; +} + +static const struct media_device_ops plat_csi_media_ops = { + .link_notify = plat_csi_link_notify, +}; + + +static int +subdev_notifier_bound(struct v4l2_async_notifier *notifier, + struct v4l2_subdev *subdev, struct v4l2_async_subdev *asd) +{ + struct plat_csi_dev *plat_csi = notifier_to_plat_csi(notifier); + struct plat_csi_sensor_info *si = NULL; + int i; + + for (i = 0; i < ARRAY_SIZE(plat_csi->sensor); i++) + if (plat_csi->sensor[i].asd.match.of.node == + subdev->dev->of_node) + si = &plat_csi->sensor[i]; + + if (si == NULL) + return -EINVAL; + + v4l2_set_subdev_hostdata(subdev, &si->pdata); + + subdev->grp_id = GRP_ID_SENSOR; + + si->subdev = subdev; + + dev_dbg(&plat_csi->pdev->dev, "Registered sensor subdevice: %s (%d)\n", + subdev->name, plat_csi->num_sensors); + + plat_csi->num_sensors++; + + return 0; +} + +static int +subdev_notifier_complete(struct v4l2_async_notifier *notifier) +{ + struct plat_csi_dev *plat_csi = notifier_to_plat_csi(notifier); + int ret; + + mutex_lock(&plat_csi->media_dev.graph_mutex); + + ret = plat_csi_create_links(plat_csi); + if (ret < 0) + goto unlock; + + ret = v4l2_device_register_subdev_nodes(&plat_csi->v4l2_dev); +unlock: + mutex_unlock(&plat_csi->media_dev.graph_mutex); + if (ret < 0) + return ret; + + return media_device_register(&plat_csi->media_dev); +} + +static int plat_csi_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct v4l2_device *v4l2_dev; + struct plat_csi_dev *plat_csi; + int ret; + + dev_dbg(dev, "Installing CSI Video Platform module\n"); + + plat_csi = devm_kzalloc(dev, sizeof(*plat_csi), GFP_KERNEL); + if (!plat_csi) + return -ENOMEM; + + spin_lock_init(&plat_csi->slock); + INIT_LIST_HEAD(&plat_csi->pipelines); + plat_csi->pdev = pdev; + + strlcpy(plat_csi->media_dev.model, "CSI Video Platform", + sizeof(plat_csi->media_dev.model)); + plat_csi->media_dev.ops = &plat_csi_media_ops; + plat_csi->media_dev.dev = dev; + + v4l2_dev = &plat_csi->v4l2_dev; + v4l2_dev->mdev = &plat_csi->media_dev; + strlcpy(v4l2_dev->name, "plat-csi", sizeof(v4l2_dev->name)); + + media_device_init(&plat_csi->media_dev); + + ret = v4l2_device_register(dev, &plat_csi->v4l2_dev); + if (ret < 0) { + v4l2_err(v4l2_dev, "Failed to register v4l2_device: %d\n", ret); + return ret; + } + + platform_set_drvdata(pdev, plat_csi); + + ret = plat_csi_register_platform_entities(plat_csi, dev->of_node); + if (ret) + goto err_m_ent; + + ret = plat_csi_register_sensor_entities(plat_csi); + if (ret) + goto err_m_ent; + + if (plat_csi->num_sensors > 0) { + plat_csi->subdev_notifier.subdevs = plat_csi->async_subdevs; + plat_csi->subdev_notifier.num_subdevs = plat_csi->num_sensors; + plat_csi->subdev_notifier.bound = subdev_notifier_bound; + plat_csi->subdev_notifier.complete = subdev_notifier_complete; + plat_csi->num_sensors = 0; + + ret = v4l2_async_notifier_register(&plat_csi->v4l2_dev, + &plat_csi->subdev_notifier); + if (ret) + goto err_m_ent; + } + + return 0; + +err_m_ent: + plat_csi_unregister_entities(plat_csi); + media_device_unregister(&plat_csi->media_dev); + media_device_cleanup(&plat_csi->media_dev); + v4l2_device_unregister(&plat_csi->v4l2_dev); + return ret; +} + +static int plat_csi_remove(struct platform_device *pdev) +{ + struct plat_csi_dev *dev = platform_get_drvdata(pdev); + + v4l2_async_notifier_unregister(&dev->subdev_notifier); + + v4l2_device_unregister(&dev->v4l2_dev); + plat_csi_unregister_entities(dev); + plat_csi_pipelines_free(dev); + media_device_unregister(&dev->media_dev); + media_device_cleanup(&dev->media_dev); + + dev_info(&pdev->dev, "Driver removed\n"); + + return 0; +} + +/** + * @short of_device_id structure + */ +static const struct of_device_id plat_csi_of_match[] = { + {.compatible = "snps,plat-csi"}, + {} +}; + +MODULE_DEVICE_TABLE(of, plat_csi_of_match); + +/** + * @short Platform driver structure + */ +static struct platform_driver plat_csi_pdrv = { + .remove = plat_csi_remove, + .probe = plat_csi_probe, + .driver = { + .name = "snps,plat-csi", + .owner = THIS_MODULE, + .of_match_table = plat_csi_of_match, + }, +}; + +static int __init +plat_csi_init(void) +{ + request_module("dw-mipi-csi"); + + return platform_driver_register(&plat_csi_pdrv); +} + +static void __exit +plat_csi_exit(void) +{ + platform_driver_unregister(&plat_csi_pdrv); +} + +module_init(plat_csi_init); +module_exit(plat_csi_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Ramiro Oliveira "); +MODULE_DESCRIPTION("Video Platform driver for MIPI CSI-2 Host"); diff --git a/drivers/media/platform/dwc/csi_video_plat.h b/drivers/media/platform/dwc/csi_video_plat.h new file mode 100644 index 000000000000..9f462113b284 --- /dev/null +++ b/drivers/media/platform/dwc/csi_video_plat.h @@ -0,0 +1,101 @@ +/* + * Copyright (C) 2016 Synopsys, Inc. All rights reserved. + * + * 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. + */ + +#ifndef PLAT_CSI_H_ +#define PLAT_CSI_H_ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "dw_mipi_csi.h" +#include "csi_video_device.h" + +#define VIDEODEV_OF_NODE_NAME "video-device" +#define CSI_OF_NODE_NAME "csi2" + +enum plat_csi_subdev_index { + IDX_SENSOR, + IDX_CSI, + IDX_VDEV, + IDX_MAX, +}; + +struct plat_csi_sensor_info { + struct plat_csi_source_info pdata; + struct v4l2_async_subdev asd; + struct v4l2_subdev *subdev; + struct mipi_csi_dev *host; +}; + +struct plat_csi_pipeline { + struct plat_csi_media_pipeline ep; + struct list_head list; + struct media_entity *vdev_entity; + struct v4l2_subdev *subdevs[IDX_MAX]; +}; + +#define to_plat_csi_pipeline(_ep)\ + container_of(_ep, struct plat_csi_pipeline, ep) + +struct mipi_csi_info { + struct v4l2_subdev *sd; + int id; +}; + +/** + * @short Structure to embed device driver information + */ +struct plat_csi_dev { + struct mipi_csi_info mipi_csi[CSI_MAX_ENTITIES]; + struct video_device_dev *vid_dev; + struct device *dev; + struct media_device media_dev; + struct v4l2_device v4l2_dev; + struct platform_device *pdev; + struct plat_csi_sensor_info sensor[PLAT_MAX_SENSORS]; + struct v4l2_async_notifier subdev_notifier; + struct v4l2_async_subdev *async_subdevs[PLAT_MAX_SENSORS]; + spinlock_t slock; + struct list_head pipelines; + int num_sensors; + struct media_graph link_setup_graph; +}; + +static inline struct plat_csi_dev * +entity_to_plat_csi_mdev(struct media_entity *me) +{ + return me->graph_obj.mdev == NULL ? NULL : + container_of(me->graph_obj.mdev, struct plat_csi_dev, media_dev); +} + +static inline struct plat_csi_dev * +notifier_to_plat_csi(struct v4l2_async_notifier *n) +{ + return container_of(n, struct plat_csi_dev, subdev_notifier); +} + +static inline void +plat_csi_graph_unlock(struct plat_csi_video_entity *ve) +{ + mutex_unlock(&ve->vdev.entity.graph_obj.mdev->graph_mutex); +} + +#endif /* PLAT_CSI_H_ */