mirror of
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62b7f5931c
bcm2708: boot tested on RPi B+ v1.2
bcm2709: boot tested on RPi 3B v1.2 and RPi 4B v1.1 4G
bcm2710: boot tested on RPi 3B v1.2
bcm2711: boot tested on RPi 4B v1.1 4G
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
(cherry-picked from commit f07e572f64)
97 lines
3.3 KiB
Diff
97 lines
3.3 KiB
Diff
From 1decb017f990ea61ab421e316bf1af3a5199b73a Mon Sep 17 00:00:00 2001
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From: Jernej Skrabec <jernej.skrabec@siol.net>
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Date: Fri, 11 Oct 2019 06:32:43 -0300
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Subject: [PATCH] media: v4l2-mem2mem: add stateless_(try_)decoder_cmd
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ioctl helpers
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Commit bef41d93aac64b54c3008ca6170bec54f85784f5 upstream.
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These helpers are used by stateless codecs when they support multiple
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slices per frame and hold capture buffer flag is set. It's expected that
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all such codecs will use this code.
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Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
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Co-developed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
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Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
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Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
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---
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drivers/media/v4l2-core/v4l2-mem2mem.c | 53 ++++++++++++++++++++++++++
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include/media/v4l2-mem2mem.h | 4 ++
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2 files changed, 57 insertions(+)
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--- a/drivers/media/v4l2-core/v4l2-mem2mem.c
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+++ b/drivers/media/v4l2-core/v4l2-mem2mem.c
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@@ -1218,6 +1218,59 @@ int v4l2_m2m_ioctl_try_decoder_cmd(struc
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}
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EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_try_decoder_cmd);
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+int v4l2_m2m_ioctl_stateless_try_decoder_cmd(struct file *file, void *fh,
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+ struct v4l2_decoder_cmd *dc)
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+{
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+ if (dc->cmd != V4L2_DEC_CMD_FLUSH)
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+ return -EINVAL;
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+
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+ dc->flags = 0;
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+
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+ return 0;
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+}
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+EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_stateless_try_decoder_cmd);
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+
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+int v4l2_m2m_ioctl_stateless_decoder_cmd(struct file *file, void *priv,
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+ struct v4l2_decoder_cmd *dc)
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+{
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+ struct v4l2_fh *fh = file->private_data;
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+ struct vb2_v4l2_buffer *out_vb, *cap_vb;
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+ struct v4l2_m2m_dev *m2m_dev = fh->m2m_ctx->m2m_dev;
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+ unsigned long flags;
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+ int ret;
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+
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+ ret = v4l2_m2m_ioctl_stateless_try_decoder_cmd(file, priv, dc);
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+ if (ret < 0)
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+ return ret;
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+
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+ spin_lock_irqsave(&m2m_dev->job_spinlock, flags);
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+ out_vb = v4l2_m2m_last_src_buf(fh->m2m_ctx);
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+ cap_vb = v4l2_m2m_last_dst_buf(fh->m2m_ctx);
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+
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+ /*
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+ * If there is an out buffer pending, then clear any HOLD flag.
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+ *
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+ * By clearing this flag we ensure that when this output
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+ * buffer is processed any held capture buffer will be released.
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+ */
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+ if (out_vb) {
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+ out_vb->flags &= ~V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF;
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+ } else if (cap_vb && cap_vb->is_held) {
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+ /*
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+ * If there were no output buffers, but there is a
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+ * capture buffer that is held, then release that
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+ * buffer.
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+ */
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+ cap_vb->is_held = false;
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+ v4l2_m2m_dst_buf_remove(fh->m2m_ctx);
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+ v4l2_m2m_buf_done(cap_vb, VB2_BUF_STATE_DONE);
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+ }
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+ spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags);
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+
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+ return 0;
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+}
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+EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_stateless_decoder_cmd);
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+
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/*
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* v4l2_file_operations helpers. It is assumed here same lock is used
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* for the output and the capture buffer queue.
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--- a/include/media/v4l2-mem2mem.h
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+++ b/include/media/v4l2-mem2mem.h
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@@ -701,6 +701,10 @@ int v4l2_m2m_ioctl_try_encoder_cmd(struc
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struct v4l2_encoder_cmd *ec);
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int v4l2_m2m_ioctl_try_decoder_cmd(struct file *file, void *fh,
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struct v4l2_decoder_cmd *dc);
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+int v4l2_m2m_ioctl_stateless_try_decoder_cmd(struct file *file, void *fh,
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+ struct v4l2_decoder_cmd *dc);
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+int v4l2_m2m_ioctl_stateless_decoder_cmd(struct file *file, void *priv,
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+ struct v4l2_decoder_cmd *dc);
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int v4l2_m2m_fop_mmap(struct file *file, struct vm_area_struct *vma);
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__poll_t v4l2_m2m_fop_poll(struct file *file, poll_table *wait);
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