linux-kernel - Re: [PATCH 02/16] gpu: ipu-cpmem: Add ipu_cpmem_set_uv

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Date:	Fri, 08 Jul 2016 19:34:23 +0200
From:	Philipp Zabel <p.zabel@...gutronix.de>
To:	Steve Longerbeam <slongerbeam@...il.com>
Cc:	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
	Steve Longerbeam <steve_longerbeam@...tor.com>
Subject: Re: [PATCH 02/16] gpu: ipu-cpmem: Add ipu_cpmem_set_uv_offset()

Am Donnerstag, den 07.07.2016, 16:03 -0700 schrieb Steve Longerbeam:
> Adds ipu_cpmem_set_uv_offset(), to set planar U/V offsets.
> 
> Signed-off-by: Steve Longerbeam <steve_longerbeam@...tor.com>
> ---
>  drivers/gpu/ipu-v3/ipu-cpmem.c | 7 +++++++
>  include/video/imx-ipu-v3.h     | 1 +
>  2 files changed, 8 insertions(+)
> 
> diff --git a/drivers/gpu/ipu-v3/ipu-cpmem.c b/drivers/gpu/ipu-v3/ipu-cpmem.c
> index 6494a4d..a36c35e 100644
> --- a/drivers/gpu/ipu-v3/ipu-cpmem.c
> +++ b/drivers/gpu/ipu-v3/ipu-cpmem.c
> @@ -253,6 +253,13 @@ void ipu_cpmem_set_buffer(struct ipuv3_channel *ch, int bufnum, dma_addr_t buf)
>  }
>  EXPORT_SYMBOL_GPL(ipu_cpmem_set_buffer);
>  
> +void ipu_cpmem_set_uv_offset(struct ipuv3_channel *ch, u32 u_off, u32 v_off)
> +{
> +	ipu_ch_param_write_field(ch, IPU_FIELD_UBO, u_off / 8);
> +	ipu_ch_param_write_field(ch, IPU_FIELD_VBO, v_off / 8);
> +}
> +EXPORT_SYMBOL_GPL(ipu_cpmem_set_uv_offset);
> +

I'd prefer to avoid too much duplication in the API. Is there a reason
you can't use ipu_cpmem_set_yuv_planar_full?

regards
Philipp