Re: [PATCH v3 6/6] media: qcom: iris: vdec: allow GEN2 decoding into 10bit format

[Dmitry Baryshkov]

On Mon, May 11, 2026 at 11:20:31AM +0200, Neil Armstrong wrote:
> Add the necessary bits into the gen2 platforms tables and handlers
> to allow decoding streams into 10bit pixel formats.
> 
> Signed-off-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx>
> ---
>  .../media/platform/qcom/iris/iris_hfi_gen2_response.c    | 16 +++++++++++++++-
>  drivers/media/platform/qcom/iris/iris_instance.h         |  2 ++
>  drivers/media/platform/qcom/iris/iris_platform_gen2.c    |  8 +++++---
>  drivers/media/platform/qcom/iris/iris_vdec.c             |  8 ++++++++
>  4 files changed, 30 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/media/platform/qcom/iris/iris_hfi_gen2_response.c b/drivers/media/platform/qcom/iris/iris_hfi_gen2_response.c
> index 0541e02d7507..b6d815c01f1d 100644
> --- a/drivers/media/platform/qcom/iris/iris_hfi_gen2_response.c
> +++ b/drivers/media/platform/qcom/iris/iris_hfi_gen2_response.c
> @@ -542,6 +542,15 @@ static void iris_hfi_gen2_read_input_subcr_params(struct iris_inst *inst)
>  	pixmp_ip->width = width;
>  	pixmp_ip->height = height;
>  
> +	if (subsc_params.bit_depth == BIT_DEPTH_8 &&
> +	    pixmp_op->pixelformat != V4L2_PIX_FMT_NV12 &&
> +	    pixmp_op->pixelformat != V4L2_PIX_FMT_QC08C)
> +		pixmp_op->pixelformat = V4L2_PIX_FMT_NV12;
> +	else if (subsc_params.bit_depth == BIT_DEPTH_10 &&
> +		 pixmp_op->pixelformat != V4L2_PIX_FMT_P010 &&
> +		 pixmp_op->pixelformat != V4L2_PIX_FMT_QC10C)
> +		pixmp_op->pixelformat = V4L2_PIX_FMT_P010;

Do we support decoding of 10-bit videos to NV12 buffers?

> +
>  	switch (pixmp_op->pixelformat) {
>  	case V4L2_PIX_FMT_P010:
>  		pixmp_op->width = ALIGN(width, 128);

-- 
With best wishes
Dmitry