| /* |
| * Copyright (c) 2011 - 2012 Samsung Electronics Co., Ltd. |
| * http://www.samsung.com |
| * |
| * Samsung EXYNOS5 SoC series G-Scaler driver |
| * |
| * 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 <linux/module.h> |
| #include <linux/kernel.h> |
| #include <linux/version.h> |
| #include <linux/types.h> |
| #include <linux/errno.h> |
| #include <linux/bug.h> |
| #include <linux/interrupt.h> |
| #include <linux/workqueue.h> |
| #include <linux/device.h> |
| #include <linux/platform_device.h> |
| #include <linux/list.h> |
| #include <linux/io.h> |
| #include <linux/slab.h> |
| #include <linux/clk.h> |
| |
| #include <media/v4l2-ioctl.h> |
| |
| #include "gsc-core.h" |
| |
| static int gsc_m2m_ctx_stop_req(struct gsc_ctx *ctx) |
| { |
| struct gsc_ctx *curr_ctx; |
| struct gsc_dev *gsc = ctx->gsc_dev; |
| int ret; |
| |
| curr_ctx = v4l2_m2m_get_curr_priv(gsc->m2m.m2m_dev); |
| if (!gsc_m2m_pending(gsc) || (curr_ctx != ctx)) |
| return 0; |
| |
| gsc_ctx_state_lock_set(GSC_CTX_STOP_REQ, ctx); |
| ret = wait_event_timeout(gsc->irq_queue, |
| !gsc_ctx_state_is_set(GSC_CTX_STOP_REQ, ctx), |
| GSC_SHUTDOWN_TIMEOUT); |
| |
| return ret == 0 ? -ETIMEDOUT : ret; |
| } |
| |
| static int gsc_m2m_start_streaming(struct vb2_queue *q, unsigned int count) |
| { |
| struct gsc_ctx *ctx = q->drv_priv; |
| int ret; |
| |
| ret = pm_runtime_get_sync(&ctx->gsc_dev->pdev->dev); |
| return ret > 0 ? 0 : ret; |
| } |
| |
| static int gsc_m2m_stop_streaming(struct vb2_queue *q) |
| { |
| struct gsc_ctx *ctx = q->drv_priv; |
| int ret; |
| |
| ret = gsc_m2m_ctx_stop_req(ctx); |
| if (ret == -ETIMEDOUT) |
| gsc_m2m_job_finish(ctx, VB2_BUF_STATE_ERROR); |
| |
| pm_runtime_put(&ctx->gsc_dev->pdev->dev); |
| |
| return 0; |
| } |
| |
| void gsc_m2m_job_finish(struct gsc_ctx *ctx, int vb_state) |
| { |
| struct vb2_buffer *src_vb, *dst_vb; |
| |
| if (!ctx || !ctx->m2m_ctx) |
| return; |
| |
| src_vb = v4l2_m2m_src_buf_remove(ctx->m2m_ctx); |
| dst_vb = v4l2_m2m_dst_buf_remove(ctx->m2m_ctx); |
| |
| if (src_vb && dst_vb) { |
| v4l2_m2m_buf_done(src_vb, vb_state); |
| v4l2_m2m_buf_done(dst_vb, vb_state); |
| |
| v4l2_m2m_job_finish(ctx->gsc_dev->m2m.m2m_dev, |
| ctx->m2m_ctx); |
| } |
| } |
| |
| |
| static void gsc_m2m_job_abort(void *priv) |
| { |
| struct gsc_ctx *ctx = priv; |
| int ret; |
| |
| ret = gsc_m2m_ctx_stop_req(ctx); |
| if (ret == -ETIMEDOUT) |
| gsc_m2m_job_finish(ctx, VB2_BUF_STATE_ERROR); |
| } |
| |
| int gsc_fill_addr(struct gsc_ctx *ctx) |
| { |
| struct gsc_frame *s_frame, *d_frame; |
| struct vb2_buffer *vb = NULL; |
| int ret; |
| |
| s_frame = &ctx->s_frame; |
| d_frame = &ctx->d_frame; |
| |
| vb = v4l2_m2m_next_src_buf(ctx->m2m_ctx); |
| ret = gsc_prepare_addr(ctx, vb, s_frame, &s_frame->addr); |
| if (ret) |
| return ret; |
| |
| vb = v4l2_m2m_next_dst_buf(ctx->m2m_ctx); |
| return gsc_prepare_addr(ctx, vb, d_frame, &d_frame->addr); |
| } |
| |
| static void gsc_m2m_device_run(void *priv) |
| { |
| struct gsc_ctx *ctx = priv; |
| struct gsc_dev *gsc; |
| unsigned long flags; |
| u32 ret; |
| bool is_set = false; |
| |
| if (WARN(!ctx, "null hardware context\n")) |
| return; |
| |
| gsc = ctx->gsc_dev; |
| spin_lock_irqsave(&gsc->slock, flags); |
| |
| set_bit(ST_M2M_PEND, &gsc->state); |
| |
| /* Reconfigure hardware if the context has changed. */ |
| if (gsc->m2m.ctx != ctx) { |
| pr_debug("gsc->m2m.ctx = 0x%p, current_ctx = 0x%p", |
| gsc->m2m.ctx, ctx); |
| ctx->state |= GSC_PARAMS; |
| gsc->m2m.ctx = ctx; |
| } |
| |
| is_set = (ctx->state & GSC_CTX_STOP_REQ) ? 1 : 0; |
| ctx->state &= ~GSC_CTX_STOP_REQ; |
| if (is_set) { |
| wake_up(&gsc->irq_queue); |
| goto put_device; |
| } |
| |
| ret = gsc_fill_addr(ctx); |
| if (ret) { |
| pr_err("Wrong address"); |
| goto put_device; |
| } |
| |
| gsc_set_prefbuf(gsc, &ctx->s_frame); |
| gsc_hw_set_input_addr(gsc, &ctx->s_frame.addr, GSC_M2M_BUF_NUM); |
| gsc_hw_set_output_addr(gsc, &ctx->d_frame.addr, GSC_M2M_BUF_NUM); |
| |
| if (ctx->state & GSC_PARAMS) { |
| gsc_hw_set_input_buf_masking(gsc, GSC_M2M_BUF_NUM, false); |
| gsc_hw_set_output_buf_masking(gsc, GSC_M2M_BUF_NUM, false); |
| gsc_hw_set_frm_done_irq_mask(gsc, false); |
| gsc_hw_set_gsc_irq_enable(gsc, true); |
| |
| if (gsc_set_scaler_info(ctx)) { |
| pr_err("Scaler setup error"); |
| goto put_device; |
| } |
| |
| gsc_hw_set_input_path(ctx); |
| gsc_hw_set_in_size(ctx); |
| gsc_hw_set_in_image_format(ctx); |
| |
| gsc_hw_set_output_path(ctx); |
| gsc_hw_set_out_size(ctx); |
| gsc_hw_set_out_image_format(ctx); |
| |
| gsc_hw_set_prescaler(ctx); |
| gsc_hw_set_mainscaler(ctx); |
| gsc_hw_set_rotation(ctx); |
| gsc_hw_set_global_alpha(ctx); |
| } |
| |
| /* update shadow registers */ |
| gsc_hw_set_sfr_update(ctx); |
| |
| ctx->state &= ~GSC_PARAMS; |
| gsc_hw_enable_control(gsc, true); |
| |
| spin_unlock_irqrestore(&gsc->slock, flags); |
| return; |
| |
| put_device: |
| ctx->state &= ~GSC_PARAMS; |
| spin_unlock_irqrestore(&gsc->slock, flags); |
| } |
| |
| static int gsc_m2m_queue_setup(struct vb2_queue *vq, |
| const struct v4l2_format *fmt, |
| unsigned int *num_buffers, unsigned int *num_planes, |
| unsigned int sizes[], void *allocators[]) |
| { |
| struct gsc_ctx *ctx = vb2_get_drv_priv(vq); |
| struct gsc_frame *frame; |
| int i; |
| |
| frame = ctx_get_frame(ctx, vq->type); |
| if (IS_ERR(frame)) |
| return PTR_ERR(frame); |
| |
| if (!frame->fmt) |
| return -EINVAL; |
| |
| *num_planes = frame->fmt->num_planes; |
| for (i = 0; i < frame->fmt->num_planes; i++) { |
| sizes[i] = frame->payload[i]; |
| allocators[i] = ctx->gsc_dev->alloc_ctx; |
| } |
| return 0; |
| } |
| |
| static int gsc_m2m_buf_prepare(struct vb2_buffer *vb) |
| { |
| struct gsc_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); |
| struct gsc_frame *frame; |
| int i; |
| |
| frame = ctx_get_frame(ctx, vb->vb2_queue->type); |
| if (IS_ERR(frame)) |
| return PTR_ERR(frame); |
| |
| if (!V4L2_TYPE_IS_OUTPUT(vb->vb2_queue->type)) { |
| for (i = 0; i < frame->fmt->num_planes; i++) |
| vb2_set_plane_payload(vb, i, frame->payload[i]); |
| } |
| |
| return 0; |
| } |
| |
| static void gsc_m2m_buf_queue(struct vb2_buffer *vb) |
| { |
| struct gsc_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); |
| |
| pr_debug("ctx: %p, ctx->state: 0x%x", ctx, ctx->state); |
| |
| if (ctx->m2m_ctx) |
| v4l2_m2m_buf_queue(ctx->m2m_ctx, vb); |
| } |
| |
| struct vb2_ops gsc_m2m_qops = { |
| .queue_setup = gsc_m2m_queue_setup, |
| .buf_prepare = gsc_m2m_buf_prepare, |
| .buf_queue = gsc_m2m_buf_queue, |
| .wait_prepare = gsc_unlock, |
| .wait_finish = gsc_lock, |
| .stop_streaming = gsc_m2m_stop_streaming, |
| .start_streaming = gsc_m2m_start_streaming, |
| }; |
| |
| static int gsc_m2m_querycap(struct file *file, void *fh, |
| struct v4l2_capability *cap) |
| { |
| struct gsc_ctx *ctx = fh_to_ctx(fh); |
| struct gsc_dev *gsc = ctx->gsc_dev; |
| |
| strlcpy(cap->driver, gsc->pdev->name, sizeof(cap->driver)); |
| strlcpy(cap->card, gsc->pdev->name, sizeof(cap->card)); |
| strlcpy(cap->bus_info, "platform", sizeof(cap->bus_info)); |
| cap->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_M2M_MPLANE | |
| V4L2_CAP_VIDEO_CAPTURE_MPLANE | V4L2_CAP_VIDEO_OUTPUT_MPLANE; |
| |
| cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; |
| return 0; |
| } |
| |
| static int gsc_m2m_enum_fmt_mplane(struct file *file, void *priv, |
| struct v4l2_fmtdesc *f) |
| { |
| return gsc_enum_fmt_mplane(f); |
| } |
| |
| static int gsc_m2m_g_fmt_mplane(struct file *file, void *fh, |
| struct v4l2_format *f) |
| { |
| struct gsc_ctx *ctx = fh_to_ctx(fh); |
| |
| return gsc_g_fmt_mplane(ctx, f); |
| } |
| |
| static int gsc_m2m_try_fmt_mplane(struct file *file, void *fh, |
| struct v4l2_format *f) |
| { |
| struct gsc_ctx *ctx = fh_to_ctx(fh); |
| |
| return gsc_try_fmt_mplane(ctx, f); |
| } |
| |
| static int gsc_m2m_s_fmt_mplane(struct file *file, void *fh, |
| struct v4l2_format *f) |
| { |
| struct gsc_ctx *ctx = fh_to_ctx(fh); |
| struct vb2_queue *vq; |
| struct gsc_frame *frame; |
| struct v4l2_pix_format_mplane *pix; |
| int i, ret = 0; |
| |
| ret = gsc_m2m_try_fmt_mplane(file, fh, f); |
| if (ret) |
| return ret; |
| |
| vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type); |
| |
| if (vb2_is_streaming(vq)) { |
| pr_err("queue (%d) busy", f->type); |
| return -EBUSY; |
| } |
| |
| if (V4L2_TYPE_IS_OUTPUT(f->type)) |
| frame = &ctx->s_frame; |
| else |
| frame = &ctx->d_frame; |
| |
| pix = &f->fmt.pix_mp; |
| frame->fmt = find_fmt(&pix->pixelformat, NULL, 0); |
| frame->colorspace = pix->colorspace; |
| if (!frame->fmt) |
| return -EINVAL; |
| |
| for (i = 0; i < frame->fmt->num_planes; i++) |
| frame->payload[i] = pix->plane_fmt[i].sizeimage; |
| |
| gsc_set_frame_size(frame, pix->width, pix->height); |
| |
| if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) |
| gsc_ctx_state_lock_set(GSC_PARAMS | GSC_DST_FMT, ctx); |
| else |
| gsc_ctx_state_lock_set(GSC_PARAMS | GSC_SRC_FMT, ctx); |
| |
| pr_debug("f_w: %d, f_h: %d", frame->f_width, frame->f_height); |
| |
| return 0; |
| } |
| |
| static int gsc_m2m_reqbufs(struct file *file, void *fh, |
| struct v4l2_requestbuffers *reqbufs) |
| { |
| struct gsc_ctx *ctx = fh_to_ctx(fh); |
| struct gsc_dev *gsc = ctx->gsc_dev; |
| struct gsc_frame *frame; |
| u32 max_cnt; |
| |
| max_cnt = (reqbufs->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) ? |
| gsc->variant->in_buf_cnt : gsc->variant->out_buf_cnt; |
| if (reqbufs->count > max_cnt) { |
| return -EINVAL; |
| } else if (reqbufs->count == 0) { |
| if (reqbufs->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) |
| gsc_ctx_state_lock_clear(GSC_SRC_FMT, ctx); |
| else |
| gsc_ctx_state_lock_clear(GSC_DST_FMT, ctx); |
| } |
| |
| frame = ctx_get_frame(ctx, reqbufs->type); |
| |
| return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs); |
| } |
| |
| static int gsc_m2m_querybuf(struct file *file, void *fh, |
| struct v4l2_buffer *buf) |
| { |
| struct gsc_ctx *ctx = fh_to_ctx(fh); |
| return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf); |
| } |
| |
| static int gsc_m2m_qbuf(struct file *file, void *fh, |
| struct v4l2_buffer *buf) |
| { |
| struct gsc_ctx *ctx = fh_to_ctx(fh); |
| return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf); |
| } |
| |
| static int gsc_m2m_dqbuf(struct file *file, void *fh, |
| struct v4l2_buffer *buf) |
| { |
| struct gsc_ctx *ctx = fh_to_ctx(fh); |
| return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf); |
| } |
| |
| static int gsc_m2m_streamon(struct file *file, void *fh, |
| enum v4l2_buf_type type) |
| { |
| struct gsc_ctx *ctx = fh_to_ctx(fh); |
| |
| /* The source and target color format need to be set */ |
| if (V4L2_TYPE_IS_OUTPUT(type)) { |
| if (!gsc_ctx_state_is_set(GSC_SRC_FMT, ctx)) |
| return -EINVAL; |
| } else if (!gsc_ctx_state_is_set(GSC_DST_FMT, ctx)) { |
| return -EINVAL; |
| } |
| |
| return v4l2_m2m_streamon(file, ctx->m2m_ctx, type); |
| } |
| |
| static int gsc_m2m_streamoff(struct file *file, void *fh, |
| enum v4l2_buf_type type) |
| { |
| struct gsc_ctx *ctx = fh_to_ctx(fh); |
| return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type); |
| } |
| |
| /* Return 1 if rectangle a is enclosed in rectangle b, or 0 otherwise. */ |
| static int is_rectangle_enclosed(struct v4l2_rect *a, struct v4l2_rect *b) |
| { |
| if (a->left < b->left || a->top < b->top) |
| return 0; |
| |
| if (a->left + a->width > b->left + b->width) |
| return 0; |
| |
| if (a->top + a->height > b->top + b->height) |
| return 0; |
| |
| return 1; |
| } |
| |
| static int gsc_m2m_g_selection(struct file *file, void *fh, |
| struct v4l2_selection *s) |
| { |
| struct gsc_frame *frame; |
| struct gsc_ctx *ctx = fh_to_ctx(fh); |
| |
| if ((s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) && |
| (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)) |
| return -EINVAL; |
| |
| frame = ctx_get_frame(ctx, s->type); |
| if (IS_ERR(frame)) |
| return PTR_ERR(frame); |
| |
| switch (s->target) { |
| case V4L2_SEL_TGT_COMPOSE_DEFAULT: |
| case V4L2_SEL_TGT_COMPOSE_BOUNDS: |
| case V4L2_SEL_TGT_CROP_BOUNDS: |
| case V4L2_SEL_TGT_CROP_DEFAULT: |
| s->r.left = 0; |
| s->r.top = 0; |
| s->r.width = frame->f_width; |
| s->r.height = frame->f_height; |
| return 0; |
| |
| case V4L2_SEL_TGT_COMPOSE: |
| case V4L2_SEL_TGT_CROP: |
| s->r.left = frame->crop.left; |
| s->r.top = frame->crop.top; |
| s->r.width = frame->crop.width; |
| s->r.height = frame->crop.height; |
| return 0; |
| } |
| |
| return -EINVAL; |
| } |
| |
| static int gsc_m2m_s_selection(struct file *file, void *fh, |
| struct v4l2_selection *s) |
| { |
| struct gsc_frame *frame; |
| struct gsc_ctx *ctx = fh_to_ctx(fh); |
| struct v4l2_crop cr; |
| struct gsc_variant *variant = ctx->gsc_dev->variant; |
| int ret; |
| |
| cr.type = s->type; |
| cr.c = s->r; |
| |
| if ((s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) && |
| (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)) |
| return -EINVAL; |
| |
| ret = gsc_try_crop(ctx, &cr); |
| if (ret) |
| return ret; |
| |
| if (s->flags & V4L2_SEL_FLAG_LE && |
| !is_rectangle_enclosed(&cr.c, &s->r)) |
| return -ERANGE; |
| |
| if (s->flags & V4L2_SEL_FLAG_GE && |
| !is_rectangle_enclosed(&s->r, &cr.c)) |
| return -ERANGE; |
| |
| s->r = cr.c; |
| |
| switch (s->target) { |
| case V4L2_SEL_TGT_COMPOSE_BOUNDS: |
| case V4L2_SEL_TGT_COMPOSE_DEFAULT: |
| case V4L2_SEL_TGT_COMPOSE: |
| frame = &ctx->s_frame; |
| break; |
| |
| case V4L2_SEL_TGT_CROP_BOUNDS: |
| case V4L2_SEL_TGT_CROP: |
| case V4L2_SEL_TGT_CROP_DEFAULT: |
| frame = &ctx->d_frame; |
| break; |
| |
| default: |
| return -EINVAL; |
| } |
| |
| /* Check to see if scaling ratio is within supported range */ |
| if (gsc_ctx_state_is_set(GSC_DST_FMT | GSC_SRC_FMT, ctx)) { |
| if (s->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { |
| ret = gsc_check_scaler_ratio(variant, cr.c.width, |
| cr.c.height, ctx->d_frame.crop.width, |
| ctx->d_frame.crop.height, |
| ctx->gsc_ctrls.rotate->val, ctx->out_path); |
| } else { |
| ret = gsc_check_scaler_ratio(variant, |
| ctx->s_frame.crop.width, |
| ctx->s_frame.crop.height, cr.c.width, |
| cr.c.height, ctx->gsc_ctrls.rotate->val, |
| ctx->out_path); |
| } |
| |
| if (ret) { |
| pr_err("Out of scaler range"); |
| return -EINVAL; |
| } |
| } |
| |
| frame->crop = cr.c; |
| |
| gsc_ctx_state_lock_set(GSC_PARAMS, ctx); |
| return 0; |
| } |
| |
| static const struct v4l2_ioctl_ops gsc_m2m_ioctl_ops = { |
| .vidioc_querycap = gsc_m2m_querycap, |
| .vidioc_enum_fmt_vid_cap_mplane = gsc_m2m_enum_fmt_mplane, |
| .vidioc_enum_fmt_vid_out_mplane = gsc_m2m_enum_fmt_mplane, |
| .vidioc_g_fmt_vid_cap_mplane = gsc_m2m_g_fmt_mplane, |
| .vidioc_g_fmt_vid_out_mplane = gsc_m2m_g_fmt_mplane, |
| .vidioc_try_fmt_vid_cap_mplane = gsc_m2m_try_fmt_mplane, |
| .vidioc_try_fmt_vid_out_mplane = gsc_m2m_try_fmt_mplane, |
| .vidioc_s_fmt_vid_cap_mplane = gsc_m2m_s_fmt_mplane, |
| .vidioc_s_fmt_vid_out_mplane = gsc_m2m_s_fmt_mplane, |
| .vidioc_reqbufs = gsc_m2m_reqbufs, |
| .vidioc_querybuf = gsc_m2m_querybuf, |
| .vidioc_qbuf = gsc_m2m_qbuf, |
| .vidioc_dqbuf = gsc_m2m_dqbuf, |
| .vidioc_streamon = gsc_m2m_streamon, |
| .vidioc_streamoff = gsc_m2m_streamoff, |
| .vidioc_g_selection = gsc_m2m_g_selection, |
| .vidioc_s_selection = gsc_m2m_s_selection |
| }; |
| |
| static int queue_init(void *priv, struct vb2_queue *src_vq, |
| struct vb2_queue *dst_vq) |
| { |
| struct gsc_ctx *ctx = priv; |
| int ret; |
| |
| memset(src_vq, 0, sizeof(*src_vq)); |
| src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE; |
| src_vq->io_modes = VB2_MMAP | VB2_USERPTR; |
| src_vq->drv_priv = ctx; |
| src_vq->ops = &gsc_m2m_qops; |
| src_vq->mem_ops = &vb2_dma_contig_memops; |
| src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer); |
| |
| ret = vb2_queue_init(src_vq); |
| if (ret) |
| return ret; |
| |
| memset(dst_vq, 0, sizeof(*dst_vq)); |
| dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE; |
| dst_vq->io_modes = VB2_MMAP | VB2_USERPTR; |
| dst_vq->drv_priv = ctx; |
| dst_vq->ops = &gsc_m2m_qops; |
| dst_vq->mem_ops = &vb2_dma_contig_memops; |
| dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer); |
| |
| return vb2_queue_init(dst_vq); |
| } |
| |
| static int gsc_m2m_open(struct file *file) |
| { |
| struct gsc_dev *gsc = video_drvdata(file); |
| struct gsc_ctx *ctx = NULL; |
| int ret; |
| |
| pr_debug("pid: %d, state: 0x%lx", task_pid_nr(current), gsc->state); |
| |
| if (mutex_lock_interruptible(&gsc->lock)) |
| return -ERESTARTSYS; |
| |
| ctx = kzalloc(sizeof (*ctx), GFP_KERNEL); |
| if (!ctx) { |
| ret = -ENOMEM; |
| goto unlock; |
| } |
| |
| v4l2_fh_init(&ctx->fh, gsc->m2m.vfd); |
| ret = gsc_ctrls_create(ctx); |
| if (ret) |
| goto error_fh; |
| |
| /* Use separate control handler per file handle */ |
| ctx->fh.ctrl_handler = &ctx->ctrl_handler; |
| file->private_data = &ctx->fh; |
| v4l2_fh_add(&ctx->fh); |
| |
| ctx->gsc_dev = gsc; |
| /* Default color format */ |
| ctx->s_frame.fmt = get_format(0); |
| ctx->d_frame.fmt = get_format(0); |
| /* Setup the device context for mem2mem mode. */ |
| ctx->state = GSC_CTX_M2M; |
| ctx->flags = 0; |
| ctx->in_path = GSC_DMA; |
| ctx->out_path = GSC_DMA; |
| |
| ctx->m2m_ctx = v4l2_m2m_ctx_init(gsc->m2m.m2m_dev, ctx, queue_init); |
| if (IS_ERR(ctx->m2m_ctx)) { |
| pr_err("Failed to initialize m2m context"); |
| ret = PTR_ERR(ctx->m2m_ctx); |
| goto error_ctrls; |
| } |
| |
| if (gsc->m2m.refcnt++ == 0) |
| set_bit(ST_M2M_OPEN, &gsc->state); |
| |
| pr_debug("gsc m2m driver is opened, ctx(0x%p)", ctx); |
| |
| mutex_unlock(&gsc->lock); |
| return 0; |
| |
| error_ctrls: |
| gsc_ctrls_delete(ctx); |
| error_fh: |
| v4l2_fh_del(&ctx->fh); |
| v4l2_fh_exit(&ctx->fh); |
| kfree(ctx); |
| unlock: |
| mutex_unlock(&gsc->lock); |
| return ret; |
| } |
| |
| static int gsc_m2m_release(struct file *file) |
| { |
| struct gsc_ctx *ctx = fh_to_ctx(file->private_data); |
| struct gsc_dev *gsc = ctx->gsc_dev; |
| |
| pr_debug("pid: %d, state: 0x%lx, refcnt= %d", |
| task_pid_nr(current), gsc->state, gsc->m2m.refcnt); |
| |
| if (mutex_lock_interruptible(&gsc->lock)) |
| return -ERESTARTSYS; |
| |
| v4l2_m2m_ctx_release(ctx->m2m_ctx); |
| gsc_ctrls_delete(ctx); |
| v4l2_fh_del(&ctx->fh); |
| v4l2_fh_exit(&ctx->fh); |
| |
| if (--gsc->m2m.refcnt <= 0) |
| clear_bit(ST_M2M_OPEN, &gsc->state); |
| kfree(ctx); |
| |
| mutex_unlock(&gsc->lock); |
| return 0; |
| } |
| |
| static unsigned int gsc_m2m_poll(struct file *file, |
| struct poll_table_struct *wait) |
| { |
| struct gsc_ctx *ctx = fh_to_ctx(file->private_data); |
| struct gsc_dev *gsc = ctx->gsc_dev; |
| int ret; |
| |
| if (mutex_lock_interruptible(&gsc->lock)) |
| return -ERESTARTSYS; |
| |
| ret = v4l2_m2m_poll(file, ctx->m2m_ctx, wait); |
| mutex_unlock(&gsc->lock); |
| |
| return ret; |
| } |
| |
| static int gsc_m2m_mmap(struct file *file, struct vm_area_struct *vma) |
| { |
| struct gsc_ctx *ctx = fh_to_ctx(file->private_data); |
| struct gsc_dev *gsc = ctx->gsc_dev; |
| int ret; |
| |
| if (mutex_lock_interruptible(&gsc->lock)) |
| return -ERESTARTSYS; |
| |
| ret = v4l2_m2m_mmap(file, ctx->m2m_ctx, vma); |
| mutex_unlock(&gsc->lock); |
| |
| return ret; |
| } |
| |
| static const struct v4l2_file_operations gsc_m2m_fops = { |
| .owner = THIS_MODULE, |
| .open = gsc_m2m_open, |
| .release = gsc_m2m_release, |
| .poll = gsc_m2m_poll, |
| .unlocked_ioctl = video_ioctl2, |
| .mmap = gsc_m2m_mmap, |
| }; |
| |
| static struct v4l2_m2m_ops gsc_m2m_ops = { |
| .device_run = gsc_m2m_device_run, |
| .job_abort = gsc_m2m_job_abort, |
| }; |
| |
| int gsc_register_m2m_device(struct gsc_dev *gsc) |
| { |
| struct platform_device *pdev; |
| int ret; |
| |
| if (!gsc) |
| return -ENODEV; |
| |
| pdev = gsc->pdev; |
| |
| gsc->vdev.fops = &gsc_m2m_fops; |
| gsc->vdev.ioctl_ops = &gsc_m2m_ioctl_ops; |
| gsc->vdev.release = video_device_release_empty; |
| gsc->vdev.lock = &gsc->lock; |
| snprintf(gsc->vdev.name, sizeof(gsc->vdev.name), "%s.%d:m2m", |
| GSC_MODULE_NAME, gsc->id); |
| |
| video_set_drvdata(&gsc->vdev, gsc); |
| |
| gsc->m2m.vfd = &gsc->vdev; |
| gsc->m2m.m2m_dev = v4l2_m2m_init(&gsc_m2m_ops); |
| if (IS_ERR(gsc->m2m.m2m_dev)) { |
| dev_err(&pdev->dev, "failed to initialize v4l2-m2m device\n"); |
| ret = PTR_ERR(gsc->m2m.m2m_dev); |
| goto err_m2m_r1; |
| } |
| |
| ret = video_register_device(&gsc->vdev, VFL_TYPE_GRABBER, -1); |
| if (ret) { |
| dev_err(&pdev->dev, |
| "%s(): failed to register video device\n", __func__); |
| goto err_m2m_r2; |
| } |
| |
| pr_debug("gsc m2m driver registered as /dev/video%d", gsc->vdev.num); |
| return 0; |
| |
| err_m2m_r2: |
| v4l2_m2m_release(gsc->m2m.m2m_dev); |
| err_m2m_r1: |
| video_device_release(gsc->m2m.vfd); |
| |
| return ret; |
| } |
| |
| void gsc_unregister_m2m_device(struct gsc_dev *gsc) |
| { |
| if (gsc) |
| v4l2_m2m_release(gsc->m2m.m2m_dev); |
| } |