From: Ezequiel Garcia <ezequiel@collabora.com>
To: linux-media@vger.kernel.org
Cc: kernel@collabora.com,
Nicolas Dufresne <nicolas.dufresne@collabora.com>,
Tomasz Figa <tfiga@chromium.org>,
linux-rockchip@lists.infradead.org,
Heiko Stuebner <heiko@sntech.de>, Jonas Karlman <jonas@kwiboo.se>,
Philipp Zabel <p.zabel@pengutronix.de>,
Boris Brezillon <boris.brezillon@collabora.com>,
Alexandre Courbot <acourbot@chromium.org>,
fbuergisser@chromium.org, linux-kernel@vger.kernel.org,
Ezequiel Garcia <ezequiel@collabora.com>
Subject: [PATCH for 5.4] media: hantro: Fix s_fmt for dynamic resolution changes
Date: Tue, 3 Sep 2019 14:12:56 -0300 [thread overview]
Message-ID: <20190903171256.25052-1-ezequiel@collabora.com> (raw)
Commit 953aaa1492c53 ("media: rockchip/vpu: Prepare things to support decoders")
changed the conditions under S_FMT was allowed for OUTPUT
CAPTURE buffers.
However, and according to the mem-to-mem stateless decoder specification,
in order to support dynamic resolution changes, S_FMT should be allowed
even if OUTPUT buffers have been allocated.
Relax decoder S_FMT restrictions on OUTPUT buffers, allowing a resolution
modification, provided the pixel format stays the same.
Tested on RK3288 platforms using ChromiumOS Video Decode/Encode Accelerator Unittests.
Fixes: 953aaa1492c53 ("media: rockchip/vpu: Prepare things to support decoders")
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
---
drivers/staging/media/hantro/hantro_v4l2.c | 22 ++++++++++++++++------
1 file changed, 16 insertions(+), 6 deletions(-)
diff --git a/drivers/staging/media/hantro/hantro_v4l2.c b/drivers/staging/media/hantro/hantro_v4l2.c
index 3dae52abb96c..d48b548842cf 100644
--- a/drivers/staging/media/hantro/hantro_v4l2.c
+++ b/drivers/staging/media/hantro/hantro_v4l2.c
@@ -367,19 +367,22 @@ vidioc_s_fmt_out_mplane(struct file *file, void *priv, struct v4l2_format *f)
{
struct v4l2_pix_format_mplane *pix_mp = &f->fmt.pix_mp;
struct hantro_ctx *ctx = fh_to_ctx(priv);
+ struct vb2_queue *vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
const struct hantro_fmt *formats;
unsigned int num_fmts;
- struct vb2_queue *vq;
int ret;
- /* Change not allowed if queue is busy. */
- vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
- if (vb2_is_busy(vq))
- return -EBUSY;
-
if (!hantro_is_encoder_ctx(ctx)) {
struct vb2_queue *peer_vq;
+ /*
+ * In other to support dynamic resolution change,
+ * the decoder admits a resolution change, as long
+ * as the pixelformat remains. Can't be done if streaming.
+ */
+ if (vb2_is_streaming(vq) || (vb2_is_busy(vq) &&
+ pix_mp->pixelformat != ctx->src_fmt.pixelformat))
+ return -EBUSY;
/*
* Since format change on the OUTPUT queue will reset
* the CAPTURE queue, we can't allow doing so
@@ -389,6 +392,13 @@ vidioc_s_fmt_out_mplane(struct file *file, void *priv, struct v4l2_format *f)
V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE);
if (vb2_is_busy(peer_vq))
return -EBUSY;
+ } else {
+ /*
+ * The encoder doesn't admit a format change if
+ * there are OUTPUT buffers allocated.
+ */
+ if (vb2_is_busy(vq))
+ return -EBUSY;
}
ret = vidioc_try_fmt_out_mplane(file, priv, f);
--
2.22.0
next reply other threads:[~2019-09-03 17:13 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-03 17:12 Ezequiel Garcia [this message]
2019-09-04 10:13 ` [PATCH for 5.4] media: hantro: Fix s_fmt for dynamic resolution changes Philipp Zabel
2019-09-04 13:01 ` Ezequiel Garcia
2019-09-04 13:28 ` Philipp Zabel
2019-09-05 18:00 ` Ezequiel Garcia
2019-09-06 9:26 ` Philipp Zabel
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