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Date: Fri, 10 Nov 2023 21:06:15 +0000
From: "Daniel Almeida" <daniel.almeida@...labora.com>
To: "Paul Kocialkowski" <paul.kocialkowski@...tlin.com>
Cc: linux-media@...r.kernel.org, linux-rockchip@...ts.infradead.org,
linux-kernel@...r.kernel.org, linux-staging@...ts.linux.dev,
"Ezequiel Garcia" <ezequiel@...guardiasur.com.ar>,
"Philipp Zabel" <p.zabel@...gutronix.de>,
"Mauro Carvalho Chehab" <mchehab@...nel.org>,
"Hans Verkuil" <hverkuil-cisco@...all.nl>,
"Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
"Nicolas Dufresne" <nicolas.dufresne@...labora.com>,
"Sebastian Fricke" <sebastian.fricke@...labora.com>,
"Thomas Petazzoni" <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH 1/4] media: vicodec:
Disable (TRY_)DECODER_CMD for the stateless case
Hi Paul,
On Thursday, November 09, 2023 17:16 -03, Paul Kocialkowski <paul.kocialkowski@...tlin.com> wrote:
> The (TRY_)DECODER_CMD ioctls are only useful for stateful decoders and for
> stateless decoders that support holding capture buffers (which is not the case
> for this driver).
>
> Disable them when registering the stateless decoder.
>
> Signed-off-by: Paul Kocialkowski <paul.kocialkowski@...tlin.com>
> ---
> .../media/test-drivers/vicodec/vicodec-core.c | 19 +++++++++++++------
> 1 file changed, 13 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/media/test-drivers/vicodec/vicodec-core.c b/drivers/media/test-drivers/vicodec/vicodec-core.c
> index 6f0e20df74e9..8f7a2b153ee9 100644
> --- a/drivers/media/test-drivers/vicodec/vicodec-core.c
> +++ b/drivers/media/test-drivers/vicodec/vicodec-core.c
> @@ -1240,6 +1240,12 @@ static int vicodec_decoder_cmd(struct file *file, void *fh,
> struct vicodec_ctx *ctx = file2ctx(file);
> int ret;
>
> + /*
> + * This ioctl should not be used with a stateless codec that doesn't
> + * support holding buffers and the associated flush command.
> + */
> + WARN_ON(ctx->is_stateless);
> +
> ret = v4l2_m2m_ioctl_try_decoder_cmd(file, fh, dc);
> if (ret < 0)
> return ret;
> @@ -2025,7 +2031,7 @@ static const struct v4l2_m2m_ops m2m_ops = {
>
> static int register_instance(struct vicodec_dev *dev,
> struct vicodec_dev_instance *dev_instance,
> - const char *name, bool is_enc)
> + const char *name, bool is_enc, bool is_stateless)
> {
> struct video_device *vfd;
> int ret;
> @@ -2045,10 +2051,11 @@ static int register_instance(struct vicodec_dev *dev,
> strscpy(vfd->name, name, sizeof(vfd->name));
> vfd->device_caps = V4L2_CAP_STREAMING |
> (multiplanar ? V4L2_CAP_VIDEO_M2M_MPLANE : V4L2_CAP_VIDEO_M2M);
> - if (is_enc) {
> + if (is_enc || is_stateless) {
> v4l2_disable_ioctl(vfd, VIDIOC_DECODER_CMD);
> v4l2_disable_ioctl(vfd, VIDIOC_TRY_DECODER_CMD);
> - } else {
> + }
> + if (!is_enc) {
> v4l2_disable_ioctl(vfd, VIDIOC_ENCODER_CMD);
> v4l2_disable_ioctl(vfd, VIDIOC_TRY_ENCODER_CMD);
> }
> @@ -2107,17 +2114,17 @@ static int vicodec_probe(struct platform_device *pdev)
> platform_set_drvdata(pdev, dev);
>
> ret = register_instance(dev, &dev->stateful_enc, "stateful-encoder",
> - true);
> + true, false);
> if (ret)
> goto unreg_dev;
>
> ret = register_instance(dev, &dev->stateful_dec, "stateful-decoder",
> - false);
> + false, false);
> if (ret)
> goto unreg_sf_enc;
>
> ret = register_instance(dev, &dev->stateless_dec, "stateless-decoder",
> - false);
> + false, true);
> if (ret)
> goto unreg_sf_dec;
>
> --
> 2.42.1
>
>
> _______________________________________________
> Linux-rockchip mailing list
> Linux-rockchip@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-rockchip
Reviewed-by: Daniel Almeida <daniel.almeida@...labora.com>
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