// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2011 - 2012 Samsung Electronics Co., Ltd.
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* http://www.samsung.com
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*
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* Samsung EXYNOS5 SoC series G-Scaler driver
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/bug.h>
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#include <linux/interrupt.h>
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#include <linux/workqueue.h>
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#include <linux/device.h>
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#include <linux/platform_device.h>
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#include <linux/list.h>
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#include <linux/io.h>
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#include <linux/slab.h>
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#include <linux/clk.h>
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#include <media/v4l2-ioctl.h>
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#include "gsc-core.h"
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static int gsc_m2m_ctx_stop_req(struct gsc_ctx *ctx)
|
{
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struct gsc_ctx *curr_ctx;
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struct gsc_dev *gsc = ctx->gsc_dev;
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int ret;
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curr_ctx = v4l2_m2m_get_curr_priv(gsc->m2m.m2m_dev);
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if (!gsc_m2m_pending(gsc) || (curr_ctx != ctx))
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return 0;
|
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gsc_ctx_state_lock_set(GSC_CTX_STOP_REQ, ctx);
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ret = wait_event_timeout(gsc->irq_queue,
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!gsc_ctx_state_is_set(GSC_CTX_STOP_REQ, ctx),
|
GSC_SHUTDOWN_TIMEOUT);
|
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return ret == 0 ? -ETIMEDOUT : ret;
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}
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static void __gsc_m2m_job_abort(struct gsc_ctx *ctx)
|
{
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int ret;
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ret = gsc_m2m_ctx_stop_req(ctx);
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if ((ret == -ETIMEDOUT) || (ctx->state & GSC_CTX_ABORT)) {
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gsc_ctx_state_lock_clear(GSC_CTX_STOP_REQ | GSC_CTX_ABORT, ctx);
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gsc_m2m_job_finish(ctx, VB2_BUF_STATE_ERROR);
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}
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}
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static int gsc_m2m_start_streaming(struct vb2_queue *q, unsigned int count)
|
{
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struct gsc_ctx *ctx = q->drv_priv;
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return pm_runtime_resume_and_get(&ctx->gsc_dev->pdev->dev);
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}
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static void __gsc_m2m_cleanup_queue(struct gsc_ctx *ctx)
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{
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struct vb2_v4l2_buffer *src_vb, *dst_vb;
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while (v4l2_m2m_num_src_bufs_ready(ctx->m2m_ctx) > 0) {
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src_vb = v4l2_m2m_src_buf_remove(ctx->m2m_ctx);
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v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_ERROR);
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}
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while (v4l2_m2m_num_dst_bufs_ready(ctx->m2m_ctx) > 0) {
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dst_vb = v4l2_m2m_dst_buf_remove(ctx->m2m_ctx);
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v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_ERROR);
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}
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}
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static void gsc_m2m_stop_streaming(struct vb2_queue *q)
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{
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struct gsc_ctx *ctx = q->drv_priv;
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__gsc_m2m_job_abort(ctx);
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__gsc_m2m_cleanup_queue(ctx);
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pm_runtime_put(&ctx->gsc_dev->pdev->dev);
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}
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void gsc_m2m_job_finish(struct gsc_ctx *ctx, int vb_state)
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{
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struct vb2_v4l2_buffer *src_vb, *dst_vb;
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if (!ctx || !ctx->m2m_ctx)
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return;
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src_vb = v4l2_m2m_src_buf_remove(ctx->m2m_ctx);
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dst_vb = v4l2_m2m_dst_buf_remove(ctx->m2m_ctx);
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if (src_vb && dst_vb) {
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dst_vb->vb2_buf.timestamp = src_vb->vb2_buf.timestamp;
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dst_vb->timecode = src_vb->timecode;
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dst_vb->flags &= ~V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
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dst_vb->flags |=
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src_vb->flags
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& V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
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v4l2_m2m_buf_done(src_vb, vb_state);
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v4l2_m2m_buf_done(dst_vb, vb_state);
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v4l2_m2m_job_finish(ctx->gsc_dev->m2m.m2m_dev,
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ctx->m2m_ctx);
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}
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}
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static void gsc_m2m_job_abort(void *priv)
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{
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__gsc_m2m_job_abort((struct gsc_ctx *)priv);
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}
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static int gsc_get_bufs(struct gsc_ctx *ctx)
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{
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struct gsc_frame *s_frame, *d_frame;
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struct vb2_v4l2_buffer *src_vb, *dst_vb;
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int ret;
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s_frame = &ctx->s_frame;
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d_frame = &ctx->d_frame;
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src_vb = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
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ret = gsc_prepare_addr(ctx, &src_vb->vb2_buf, s_frame, &s_frame->addr);
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if (ret)
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return ret;
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dst_vb = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
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ret = gsc_prepare_addr(ctx, &dst_vb->vb2_buf, d_frame, &d_frame->addr);
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if (ret)
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return ret;
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dst_vb->vb2_buf.timestamp = src_vb->vb2_buf.timestamp;
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return 0;
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}
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static void gsc_m2m_device_run(void *priv)
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{
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struct gsc_ctx *ctx = priv;
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struct gsc_dev *gsc;
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unsigned long flags;
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int ret;
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bool is_set = false;
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if (WARN(!ctx, "null hardware context\n"))
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return;
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gsc = ctx->gsc_dev;
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spin_lock_irqsave(&gsc->slock, flags);
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set_bit(ST_M2M_PEND, &gsc->state);
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/* Reconfigure hardware if the context has changed. */
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if (gsc->m2m.ctx != ctx) {
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pr_debug("gsc->m2m.ctx = 0x%p, current_ctx = 0x%p",
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gsc->m2m.ctx, ctx);
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ctx->state |= GSC_PARAMS;
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gsc->m2m.ctx = ctx;
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}
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is_set = ctx->state & GSC_CTX_STOP_REQ;
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if (is_set) {
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ctx->state &= ~GSC_CTX_STOP_REQ;
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ctx->state |= GSC_CTX_ABORT;
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wake_up(&gsc->irq_queue);
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goto put_device;
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}
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ret = gsc_get_bufs(ctx);
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if (ret) {
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pr_err("Wrong address");
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goto put_device;
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}
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gsc_set_prefbuf(gsc, &ctx->s_frame);
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gsc_hw_set_input_addr(gsc, &ctx->s_frame.addr, GSC_M2M_BUF_NUM);
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gsc_hw_set_output_addr(gsc, &ctx->d_frame.addr, GSC_M2M_BUF_NUM);
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if (ctx->state & GSC_PARAMS) {
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gsc_hw_set_input_buf_masking(gsc, GSC_M2M_BUF_NUM, false);
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gsc_hw_set_output_buf_masking(gsc, GSC_M2M_BUF_NUM, false);
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gsc_hw_set_frm_done_irq_mask(gsc, false);
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gsc_hw_set_gsc_irq_enable(gsc, true);
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if (gsc_set_scaler_info(ctx)) {
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pr_err("Scaler setup error");
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goto put_device;
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}
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gsc_hw_set_input_path(ctx);
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gsc_hw_set_in_size(ctx);
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gsc_hw_set_in_image_format(ctx);
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gsc_hw_set_output_path(ctx);
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gsc_hw_set_out_size(ctx);
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gsc_hw_set_out_image_format(ctx);
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gsc_hw_set_prescaler(ctx);
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gsc_hw_set_mainscaler(ctx);
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gsc_hw_set_rotation(ctx);
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gsc_hw_set_global_alpha(ctx);
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}
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/* update shadow registers */
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gsc_hw_set_sfr_update(ctx);
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ctx->state &= ~GSC_PARAMS;
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gsc_hw_enable_control(gsc, true);
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spin_unlock_irqrestore(&gsc->slock, flags);
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return;
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put_device:
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ctx->state &= ~GSC_PARAMS;
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spin_unlock_irqrestore(&gsc->slock, flags);
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}
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static int gsc_m2m_queue_setup(struct vb2_queue *vq,
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unsigned int *num_buffers, unsigned int *num_planes,
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unsigned int sizes[], struct device *alloc_devs[])
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{
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struct gsc_ctx *ctx = vb2_get_drv_priv(vq);
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struct gsc_frame *frame;
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int i;
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frame = ctx_get_frame(ctx, vq->type);
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if (IS_ERR(frame))
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return PTR_ERR(frame);
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if (!frame->fmt)
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return -EINVAL;
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*num_planes = frame->fmt->num_planes;
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for (i = 0; i < frame->fmt->num_planes; i++)
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sizes[i] = frame->payload[i];
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return 0;
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}
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static int gsc_m2m_buf_prepare(struct vb2_buffer *vb)
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{
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struct gsc_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
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struct gsc_frame *frame;
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int i;
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frame = ctx_get_frame(ctx, vb->vb2_queue->type);
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if (IS_ERR(frame))
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return PTR_ERR(frame);
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if (V4L2_TYPE_IS_CAPTURE(vb->vb2_queue->type)) {
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for (i = 0; i < frame->fmt->num_planes; i++)
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vb2_set_plane_payload(vb, i, frame->payload[i]);
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}
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return 0;
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}
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static void gsc_m2m_buf_queue(struct vb2_buffer *vb)
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{
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struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
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struct gsc_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
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pr_debug("ctx: %p, ctx->state: 0x%x", ctx, ctx->state);
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if (ctx->m2m_ctx)
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v4l2_m2m_buf_queue(ctx->m2m_ctx, vbuf);
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}
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static const struct vb2_ops gsc_m2m_qops = {
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.queue_setup = gsc_m2m_queue_setup,
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.buf_prepare = gsc_m2m_buf_prepare,
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.buf_queue = gsc_m2m_buf_queue,
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.wait_prepare = vb2_ops_wait_prepare,
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.wait_finish = vb2_ops_wait_finish,
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.stop_streaming = gsc_m2m_stop_streaming,
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.start_streaming = gsc_m2m_start_streaming,
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};
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static int gsc_m2m_querycap(struct file *file, void *fh,
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struct v4l2_capability *cap)
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{
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struct gsc_ctx *ctx = fh_to_ctx(fh);
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struct gsc_dev *gsc = ctx->gsc_dev;
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strscpy(cap->driver, GSC_MODULE_NAME, sizeof(cap->driver));
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strscpy(cap->card, GSC_MODULE_NAME " gscaler", sizeof(cap->card));
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snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
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dev_name(&gsc->pdev->dev));
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return 0;
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}
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static int gsc_m2m_enum_fmt(struct file *file, void *priv,
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struct v4l2_fmtdesc *f)
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{
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return gsc_enum_fmt(f);
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}
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static int gsc_m2m_g_fmt_mplane(struct file *file, void *fh,
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struct v4l2_format *f)
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{
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struct gsc_ctx *ctx = fh_to_ctx(fh);
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return gsc_g_fmt_mplane(ctx, f);
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}
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static int gsc_m2m_try_fmt_mplane(struct file *file, void *fh,
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struct v4l2_format *f)
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{
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struct gsc_ctx *ctx = fh_to_ctx(fh);
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return gsc_try_fmt_mplane(ctx, f);
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}
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static int gsc_m2m_s_fmt_mplane(struct file *file, void *fh,
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struct v4l2_format *f)
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{
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struct gsc_ctx *ctx = fh_to_ctx(fh);
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struct vb2_queue *vq;
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struct gsc_frame *frame;
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struct v4l2_pix_format_mplane *pix;
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int i, ret = 0;
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ret = gsc_m2m_try_fmt_mplane(file, fh, f);
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if (ret)
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return ret;
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vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
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if (vb2_is_streaming(vq)) {
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pr_err("queue (%d) busy", f->type);
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return -EBUSY;
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}
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if (V4L2_TYPE_IS_OUTPUT(f->type))
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frame = &ctx->s_frame;
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else
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frame = &ctx->d_frame;
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pix = &f->fmt.pix_mp;
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frame->fmt = find_fmt(&pix->pixelformat, NULL, 0);
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frame->colorspace = pix->colorspace;
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if (!frame->fmt)
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return -EINVAL;
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for (i = 0; i < frame->fmt->num_planes; i++)
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frame->payload[i] = pix->plane_fmt[i].sizeimage;
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gsc_set_frame_size(frame, pix->width, pix->height);
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if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
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gsc_ctx_state_lock_set(GSC_PARAMS | GSC_DST_FMT, ctx);
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else
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gsc_ctx_state_lock_set(GSC_PARAMS | GSC_SRC_FMT, ctx);
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pr_debug("f_w: %d, f_h: %d", frame->f_width, frame->f_height);
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return 0;
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}
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static int gsc_m2m_reqbufs(struct file *file, void *fh,
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struct v4l2_requestbuffers *reqbufs)
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{
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struct gsc_ctx *ctx = fh_to_ctx(fh);
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struct gsc_dev *gsc = ctx->gsc_dev;
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u32 max_cnt;
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max_cnt = (reqbufs->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) ?
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gsc->variant->in_buf_cnt : gsc->variant->out_buf_cnt;
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if (reqbufs->count > max_cnt)
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return -EINVAL;
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return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs);
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}
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static int gsc_m2m_expbuf(struct file *file, void *fh,
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struct v4l2_exportbuffer *eb)
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{
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struct gsc_ctx *ctx = fh_to_ctx(fh);
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return v4l2_m2m_expbuf(file, ctx->m2m_ctx, eb);
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}
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static int gsc_m2m_querybuf(struct file *file, void *fh,
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struct v4l2_buffer *buf)
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{
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struct gsc_ctx *ctx = fh_to_ctx(fh);
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return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf);
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}
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static int gsc_m2m_qbuf(struct file *file, void *fh,
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struct v4l2_buffer *buf)
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{
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struct gsc_ctx *ctx = fh_to_ctx(fh);
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return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf);
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}
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static int gsc_m2m_dqbuf(struct file *file, void *fh,
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struct v4l2_buffer *buf)
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{
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struct gsc_ctx *ctx = fh_to_ctx(fh);
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return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
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}
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static int gsc_m2m_streamon(struct file *file, void *fh,
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enum v4l2_buf_type type)
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{
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struct gsc_ctx *ctx = fh_to_ctx(fh);
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/* The source and target color format need to be set */
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if (V4L2_TYPE_IS_OUTPUT(type)) {
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if (!gsc_ctx_state_is_set(GSC_SRC_FMT, ctx))
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return -EINVAL;
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} else if (!gsc_ctx_state_is_set(GSC_DST_FMT, ctx)) {
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return -EINVAL;
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}
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return v4l2_m2m_streamon(file, ctx->m2m_ctx, type);
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}
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static int gsc_m2m_streamoff(struct file *file, void *fh,
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enum v4l2_buf_type type)
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{
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struct gsc_ctx *ctx = fh_to_ctx(fh);
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return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type);
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}
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/* Return 1 if rectangle a is enclosed in rectangle b, or 0 otherwise. */
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static int is_rectangle_enclosed(struct v4l2_rect *a, struct v4l2_rect *b)
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{
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if (a->left < b->left || a->top < b->top)
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return 0;
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if (a->left + a->width > b->left + b->width)
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return 0;
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if (a->top + a->height > b->top + b->height)
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return 0;
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return 1;
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}
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static int gsc_m2m_g_selection(struct file *file, void *fh,
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struct v4l2_selection *s)
|
{
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struct gsc_frame *frame;
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struct gsc_ctx *ctx = fh_to_ctx(fh);
|
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if ((s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) &&
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(s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT))
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return -EINVAL;
|
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frame = ctx_get_frame(ctx, s->type);
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if (IS_ERR(frame))
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return PTR_ERR(frame);
|
|
switch (s->target) {
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case V4L2_SEL_TGT_COMPOSE_DEFAULT:
|
case V4L2_SEL_TGT_COMPOSE_BOUNDS:
|
case V4L2_SEL_TGT_CROP_BOUNDS:
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case V4L2_SEL_TGT_CROP_DEFAULT:
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s->r.left = 0;
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s->r.top = 0;
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s->r.width = frame->f_width;
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s->r.height = frame->f_height;
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return 0;
|
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case V4L2_SEL_TGT_COMPOSE:
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case V4L2_SEL_TGT_CROP:
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s->r.left = frame->crop.left;
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s->r.top = frame->crop.top;
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s->r.width = frame->crop.width;
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s->r.height = frame->crop.height;
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return 0;
|
}
|
|
return -EINVAL;
|
}
|
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static int gsc_m2m_s_selection(struct file *file, void *fh,
|
struct v4l2_selection *s)
|
{
|
struct gsc_frame *frame;
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struct gsc_ctx *ctx = fh_to_ctx(fh);
|
struct gsc_variant *variant = ctx->gsc_dev->variant;
|
struct v4l2_selection sel = *s;
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int ret;
|
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if ((s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) &&
|
(s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT))
|
return -EINVAL;
|
|
ret = gsc_try_selection(ctx, &sel);
|
if (ret)
|
return ret;
|
|
if (s->flags & V4L2_SEL_FLAG_LE &&
|
!is_rectangle_enclosed(&sel.r, &s->r))
|
return -ERANGE;
|
|
if (s->flags & V4L2_SEL_FLAG_GE &&
|
!is_rectangle_enclosed(&s->r, &sel.r))
|
return -ERANGE;
|
|
s->r = sel.r;
|
|
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, sel.r.width,
|
sel.r.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, sel.r.width,
|
sel.r.height, ctx->gsc_ctrls.rotate->val,
|
ctx->out_path);
|
}
|
|
if (ret) {
|
pr_err("Out of scaler range");
|
return -EINVAL;
|
}
|
}
|
|
frame->crop = sel.r;
|
|
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 = gsc_m2m_enum_fmt,
|
.vidioc_enum_fmt_vid_out = gsc_m2m_enum_fmt,
|
.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_expbuf = gsc_m2m_expbuf,
|
.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 | VB2_DMABUF;
|
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);
|
src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
|
src_vq->lock = &ctx->gsc_dev->lock;
|
src_vq->dev = &ctx->gsc_dev->pdev->dev;
|
|
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 | VB2_DMABUF;
|
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);
|
dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
|
dst_vq->lock = &ctx->gsc_dev->lock;
|
dst_vq->dev = &ctx->gsc_dev->pdev->dev;
|
|
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);
|
v4l2_fh_del(&ctx->fh);
|
error_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);
|
|
mutex_lock(&gsc->lock);
|
|
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 __poll_t 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;
|
__poll_t ret;
|
|
if (mutex_lock_interruptible(&gsc->lock))
|
return EPOLLERR;
|
|
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 const 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;
|
gsc->vdev.vfl_dir = VFL_DIR_M2M;
|
gsc->vdev.v4l2_dev = &gsc->v4l2_dev;
|
gsc->vdev.device_caps = V4L2_CAP_STREAMING |
|
V4L2_CAP_VIDEO_M2M_MPLANE;
|
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");
|
return PTR_ERR(gsc->m2m.m2m_dev);
|
}
|
|
ret = video_register_device(&gsc->vdev, VFL_TYPE_VIDEO, -1);
|
if (ret) {
|
dev_err(&pdev->dev,
|
"%s(): failed to register video device\n", __func__);
|
goto err_m2m_release;
|
}
|
|
pr_debug("gsc m2m driver registered as /dev/video%d", gsc->vdev.num);
|
return 0;
|
|
err_m2m_release:
|
v4l2_m2m_release(gsc->m2m.m2m_dev);
|
|
return ret;
|
}
|
|
void gsc_unregister_m2m_device(struct gsc_dev *gsc)
|
{
|
if (gsc) {
|
v4l2_m2m_release(gsc->m2m.m2m_dev);
|
video_unregister_device(&gsc->vdev);
|
}
|
}
|
