linux-kernel - Re: [PATCH v2 15/15] media: vimc: Create multiplanar parameter

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Date:   Fri, 12 Apr 2019 19:50:42 -0300
From:   Helen Koike <helen.koike@...labora.com>
To:     André Almeida <andrealmeid@...labora.com>,
        linux-media@...r.kernel.org
Cc:     mchehab@...nel.org, hverkuil@...all.nl, lucmaga@...il.com,
        linux-kernel@...r.kernel.org, kernel@...labora.com,
        lkcamp@...ts.libreplanetbr.org
Subject: Re: [PATCH v2 15/15] media: vimc: Create multiplanar parameter



On 3/27/19 12:17 PM, André Almeida wrote:
> Create multiplanar kernel module parameter to define if the driver is
> running in single planar or in multiplanar mode. Define the device
> capabilities according to the multiplanar kernel parameter. A device can't
> support both CAP_VIDEO_CAPTURE and CAP_VIDEO_CAPTURE_MPLANAR at the
> same time.
> 
> Signed-off-by: André Almeida <andrealmeid@...labora.com>
> ---
> Change in v2:
> - Squash commits to create multiplanar module parameter and to define
> the device capabilities
> - Move the creation of the multiplanar parameter to the end of
> history, so it's only added when all required changes are applied
> 
>  drivers/media/platform/vimc/vimc-capture.c | 13 +++++++++++--
>  1 file changed, 11 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/media/platform/vimc/vimc-capture.c b/drivers/media/platform/vimc/vimc-capture.c
> index f5bfb36a145c..3666fcca6812 100644
> --- a/drivers/media/platform/vimc/vimc-capture.c
> +++ b/drivers/media/platform/vimc/vimc-capture.c
> @@ -28,6 +28,10 @@
>  
>  #define VIMC_CAP_DRV_NAME "vimc-capture"
>  
> +static unsigned int multiplanar;
> +module_param(multiplanar, uint, 0000);
> +MODULE_PARM_DESC(multiplanar, "0 (default) creates a single planar device, 1 creates a multiplanar device.");
> +
>  /* Checks if the device supports multiplanar capture */
>  #define IS_MULTIPLANAR(vcap) \
>  	(vcap->vdev.device_caps & V4L2_CAP_VIDEO_CAPTURE_MPLANE)
> @@ -681,7 +685,9 @@ static int vimc_cap_comp_bind(struct device *comp, struct device *master,
>  
>  	/* Initialize the vb2 queue */
>  	q = &vcap->queue;
> -	q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
> +	q->type = multiplanar ?
> +		V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE :
> +		V4L2_BUF_TYPE_VIDEO_CAPTURE;
>  	q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_USERPTR;
>  	q->drv_priv = vcap;
>  	q->buf_struct_size = sizeof(struct vimc_cap_buffer);
> @@ -709,9 +715,12 @@ static int vimc_cap_comp_bind(struct device *comp, struct device *master,
>  	dev_set_drvdata(comp, &vcap->ved);
>  	vcap->dev = comp;
>  
> +
>  	/* Initialize the video_device struct */
>  	vdev = &vcap->vdev;
> -	vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
> +	vdev->device_caps = (multiplanar ?
> +			V4L2_CAP_VIDEO_CAPTURE_MPLANE :
> +			V4L2_BUF_TYPE_VIDEO_CAPTURE) | V4L2_CAP_STREAMING;

s/V4L2_BUF_TYPE_VIDEO_CAPTURE/V4L2_CAP_VIDEO_CAPTURE

>  	vdev->entity.ops = &vimc_cap_mops;
>  	vdev->release = vimc_cap_release;
>  	vdev->fops = &vimc_cap_fops;
>