Re: [PATCH RFC 1/7] media: qcom: iris: add QC10C & P010 buffer size calculations

[Neil Armstrong]

On 4/9/26 01:59, Dmitry Baryshkov wrote:
> On Wed, Apr 08, 2026 at 06:43:54PM +0200, Neil Armstrong wrote:
> > The P010 (YUV format with 16-bits per pixel with interleaved UV)
>
> 10-bit, but with 16-bit alignment

Ack

> > and QC10C (P010 compressed mode similar to QC08C) requires specific
> > buffer calculations to allocate the right buffer size for DPB frames
> > and frames consumed by userspace.
> >
> > Similar to 8bit, the 10bit DPB frames uses QC10C format.
> >
> > Signed-off-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx>
> > ---
> >   drivers/media/platform/qcom/iris/iris_buffer.c | 81 +++++++++++++++++++++++++-
> >   1 file changed, 80 insertions(+), 1 deletion(-)
>
> > @@ -204,6 +226,55 @@ static u32 iris_yuv_buffer_size_qc08c(struct iris_inst *inst)
> >   	return ALIGN(y_meta_plane + y_plane + uv_meta_plane + uv_plane, PIXELS_4K);
> >   }
> >   
> > +/*
> > + * QC10C:
> > + * Compressed Macro-tile format for TP10.
>
> UBWC-compressed format

I literally took the head comment of the QC08C buffer size function and replaced 8 by 10...

> > + */