linux-kernel - Re: [PATCH 2/3] venus: Add a handling of QC8C compressed format

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Date:   Wed, 2 Jun 2021 11:59:37 +0200
From:   Hans Verkuil <hverkuil-cisco@...all.nl>
To:     Stanimir Varbanov <stanimir.varbanov@...aro.org>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-api@...r.kernel.org
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>
Subject: Re: [PATCH 2/3] venus: Add a handling of QC8C compressed format

On 29/04/2021 12:58, Stanimir Varbanov wrote:
> This adds QC8C compressed pixel format in the Venus driver, and
> make it enumeratable from v4l2 clients.

enumeratable -> possible to discover

(or possibly 'enumerable', but I prefer the phrase suggested above)

Regards,

	Hans

> 
> Signed-off-by: Stanimir Varbanov <stanimir.varbanov@...aro.org>
> ---
>  drivers/media/platform/qcom/venus/helpers.c |  2 ++
>  drivers/media/platform/qcom/venus/vdec.c    | 12 +++++++++++-
>  2 files changed, 13 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/media/platform/qcom/venus/helpers.c b/drivers/media/platform/qcom/venus/helpers.c
> index 9b8ff76e3c43..3a0b07d237a5 100644
> --- a/drivers/media/platform/qcom/venus/helpers.c
> +++ b/drivers/media/platform/qcom/venus/helpers.c
> @@ -561,6 +561,8 @@ static u32 to_hfi_raw_fmt(u32 v4l2_fmt)
>  		return HFI_COLOR_FORMAT_NV12;
>  	case V4L2_PIX_FMT_NV21:
>  		return HFI_COLOR_FORMAT_NV21;
> +	case V4L2_PIX_FMT_QC8C:
> +		return HFI_COLOR_FORMAT_NV12_UBWC;
>  	default:
>  		break;
>  	}
> diff --git a/drivers/media/platform/qcom/venus/vdec.c b/drivers/media/platform/qcom/venus/vdec.c
> index 5e5584fc21e9..d4cc51fc019c 100644
> --- a/drivers/media/platform/qcom/venus/vdec.c
> +++ b/drivers/media/platform/qcom/venus/vdec.c
> @@ -31,6 +31,10 @@
>   */
>  static const struct venus_format vdec_formats[] = {
>  	{
> +		.pixfmt = V4L2_PIX_FMT_QC8C,
> +		.num_planes = 1,
> +		.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE,
> +	}, {
>  		.pixfmt = V4L2_PIX_FMT_NV12,
>  		.num_planes = 1,
>  		.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE,
> @@ -696,7 +700,13 @@ static int vdec_output_conf(struct venus_inst *inst)
>  	inst->output2_buf_size =
>  			venus_helper_get_framesz_raw(out2_fmt, width, height);
>  
> -	if (is_ubwc_fmt(out_fmt)) {
> +	if (is_ubwc_fmt(out_fmt) && is_ubwc_fmt(out2_fmt)) {
> +		inst->output2_buf_size = 0;
> +		inst->opb_buftype = HFI_BUFFER_OUTPUT;
> +		inst->opb_fmt = out_fmt;
> +		inst->dpb_buftype = 0;
> +		inst->dpb_fmt = 0;
> +	} else if (is_ubwc_fmt(out_fmt)) {
>  		inst->opb_buftype = HFI_BUFFER_OUTPUT2;
>  		inst->opb_fmt = out2_fmt;
>  		inst->dpb_buftype = HFI_BUFFER_OUTPUT;
>