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Subject: Re: [PATCH v4 03/11] gpu: ipu-v3: Add planar support to interlaced
 scan
To:     Philipp Zabel <p.zabel@pengutronix.de>, linux-media@vger.kernel.org
Cc:     Mauro Carvalho Chehab <mchehab@kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
        "open list:DRM DRIVERS FOR FREESCALE IMX" 
        <dri-devel@lists.freedesktop.org>,
        open list <linux-kernel@vger.kernel.org>,
        "open list:STAGING SUBSYSTEM" <devel@driverdev.osuosl.org>,
        "open list:FRAMEBUFFER LAYER" <linux-fbdev@vger.kernel.org>,
        Hans Verkuil <hverkuil@xs4all.nl>
References: <20181004185401.15751-1-slongerbeam@gmail.com>
 <20181004185401.15751-4-slongerbeam@gmail.com>
 <1538732937.3545.8.camel@pengutronix.de>
From:   Steve Longerbeam <slongerbeam@gmail.com>
Message-ID: <2f5cbf7c-4a1c-96c2-971c-86a97ae6dbe1@gmail.com>
Date:   Mon, 8 Oct 2018 17:09:24 -0700
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On 10/05/2018 02:48 AM, Philipp Zabel wrote:
> On Thu, 2018-10-04 at 11:53 -0700, Steve Longerbeam wrote:
>> To support interlaced scan with planar formats, cpmem SLUV must
>> be programmed with the correct chroma line stride. For full and
>> partial planar 4:2:2 (YUV422P, NV16), chroma line stride must
>> be doubled. For full and partial planar 4:2:0 (YUV420, YVU420, NV12),
>> chroma line stride must _not_ be doubled, since a single chroma line
>> is shared by two luma lines.
>>
>> Signed-off-by: Steve Longerbeam <slongerbeam@gmail.com>
>> ---
>>   drivers/gpu/ipu-v3/ipu-cpmem.c              | 26 +++++++++++++++++++--
>>   drivers/staging/media/imx/imx-ic-prpencvf.c |  3 ++-
>>   drivers/staging/media/imx/imx-media-csi.c   |  3 ++-
>>   include/video/imx-ipu-v3.h                  |  3 ++-
>>   4 files changed, 30 insertions(+), 5 deletions(-)
>>
>> diff --git a/drivers/gpu/ipu-v3/ipu-cpmem.c b/drivers/gpu/ipu-v3/ipu-cpmem.c
>> index a9d2501500a1..d41df8034c5b 100644
>> --- a/drivers/gpu/ipu-v3/ipu-cpmem.c
>> +++ b/drivers/gpu/ipu-v3/ipu-cpmem.c
>> @@ -273,9 +273,10 @@ void ipu_cpmem_set_uv_offset(struct ipuv3_channel *ch, u32 u_off, u32 v_off)
>>   }
>>   EXPORT_SYMBOL_GPL(ipu_cpmem_set_uv_offset);
>>   
>> -void ipu_cpmem_interlaced_scan(struct ipuv3_channel *ch, int stride)
>> +void ipu_cpmem_interlaced_scan(struct ipuv3_channel *ch, int stride,
>> +			       u32 pixelformat)
>>   {
>> -	u32 ilo, sly;
>> +	u32 ilo, sly, sluv;
>>   
>>   	if (stride < 0) {
>>   		stride = -stride;
>> @@ -286,9 +287,30 @@ void ipu_cpmem_interlaced_scan(struct ipuv3_channel *ch, int stride)
>>   
>>   	sly = (stride * 2) - 1;
>>   
>> +	switch (pixelformat) {
>> +	case V4L2_PIX_FMT_YUV420:
>> +	case V4L2_PIX_FMT_YVU420:
>> +		sluv = stride / 2 - 1;
>> +		break;
>> +	case V4L2_PIX_FMT_NV12:
>> +		sluv = stride - 1;
>> +		break;
>> +	case V4L2_PIX_FMT_YUV422P:
>> +		sluv = stride - 1;
>> +		break;
>> +	case V4L2_PIX_FMT_NV16:
>> +		sluv = stride * 2 - 1;
>> +		break;
>> +	default:
>> +		sluv = 0;
>> +		break;
>> +	}
>> +
>>   	ipu_ch_param_write_field(ch, IPU_FIELD_SO, 1);
>>   	ipu_ch_param_write_field(ch, IPU_FIELD_ILO, ilo);
>>   	ipu_ch_param_write_field(ch, IPU_FIELD_SLY, sly);
>> +	if (sluv)
>> +		ipu_ch_param_write_field(ch, IPU_FIELD_SLUV, sluv);
>>   };
>>   EXPORT_SYMBOL_GPL(ipu_cpmem_interlaced_scan);
> [...]
>
> Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
>
> and
>
> Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
>
> to be merged with the rest of the series via the media tree. I'll take
> care not to introduce nontrivial conflicts in imx-drm.

Ok thanks.

Hans, for v5 I will just include the two IPU patches as before. As Philipp
stated, he is OK with merging them to the media tree (after his ack of
course), along with the rest of the patches in this series.

Steve