Re: [PATCH v8 5/5] media: imx: Try colorimetry at both sink and source pads

[Steve Longerbeam <slongerbeam@gmail.com>]

Hi Laurent, Rui,

Besides field type ANY, the imx7 CSI should probably be dealing with 
other field type conversions as well. I may be mistaken, but like the 
imx6, the imx7 does not have the ability to detect whether a captured 
field is a top field or a bottom field, so it can't support ALTERNATE 
mode. It should probably capture two consecutive fields and in that case 
and report seq-tb or seq-bt at its output. Also the imx6 supports 
interlacing field lines, if that is the case for imx7 it should also 
support converting ALTERNATE to INTERLACED at its output.

Steve


On 10/22/19 6:34 AM, Rui Miguel Silva wrote:
> Hi Laurent,
> On Tue 22 Oct 2019 at 02:44, Laurent Pinchart wrote:
>> Hi Steve,
>>
>> On Tue, May 21, 2019 at 06:03:17PM -0700, Steve Longerbeam wrote:
>>> Retask imx_media_fill_default_mbus_fields() to try colorimetry parameters,
>>> renaming it to to imx_media_try_colorimetry(), and call it at both sink and
>>> source pad try_fmt's. The unrelated check for uninitialized field value is
>>> moved out to appropriate places in each subdev try_fmt.
>>>
>>> The IC now supports Rec.709 and BT.601 Y'CbCr encoding, and both limited
>>> and full range quantization for both YUV and RGB space, so allow those
>>> for pipelines that route through the IC.
>>>
>>> Signed-off-by: Steve Longerbeam <slongerbeam@gmail.com>
>>> ---
>>> Changes in v7:
>>> - squashed with "media: imx: Allow Rec.709 encoding for IC routes".
>>> - remove the RGB full-range quantization restriction for IC routes.
>>> ---
>>>   drivers/staging/media/imx/imx-ic-prp.c      |  6 +-
>>>   drivers/staging/media/imx/imx-ic-prpencvf.c |  8 +--
>>>   drivers/staging/media/imx/imx-media-csi.c   | 19 +++---
>>>   drivers/staging/media/imx/imx-media-utils.c | 73 ++++++++++-----------
>>>   drivers/staging/media/imx/imx-media-vdic.c  |  5 +-
>>>   drivers/staging/media/imx/imx-media.h       |  5 +-
>>>   drivers/staging/media/imx/imx7-media-csi.c  |  8 +--
>>>   7 files changed, 62 insertions(+), 62 deletions(-)
>>>
>>> diff --git a/drivers/staging/media/imx/imx-ic-prp.c b/drivers/staging/media/imx/imx-ic-prp.c
>>> index 10ffe00f1a54..f87fe0203720 100644
>>> --- a/drivers/staging/media/imx/imx-ic-prp.c
>>> +++ b/drivers/staging/media/imx/imx-ic-prp.c
>>> @@ -193,8 +193,8 @@ static int prp_set_fmt(struct v4l2_subdev *sd,
>>>   			sdformat->format.code = cc->codes[0];
>>>   		}
>>>
>>> -		imx_media_fill_default_mbus_fields(&sdformat->format, infmt,
>>> -						   true);
>>> +		if (sdformat->format.field == V4L2_FIELD_ANY)
>>> +			sdformat->format.field = V4L2_FIELD_NONE;
>>>   		break;
>>>   	case PRP_SRC_PAD_PRPENC:
>>>   	case PRP_SRC_PAD_PRPVF:
>>> @@ -203,6 +203,8 @@ static int prp_set_fmt(struct v4l2_subdev *sd,
>>>   		break;
>>>   	}
>>>
>>> +	imx_media_try_colorimetry(&sdformat->format, true);
>>> +
>>>   	fmt = __prp_get_fmt(priv, cfg, sdformat->pad, sdformat->which);
>>>   	*fmt = sdformat->format;
>>>   out:
>>> diff --git a/drivers/staging/media/imx/imx-ic-prpencvf.c b/drivers/staging/media/imx/imx-ic-prpencvf.c
>>> index e8b36a181ccc..f2fe3c11c70e 100644
>>> --- a/drivers/staging/media/imx/imx-ic-prpencvf.c
>>> +++ b/drivers/staging/media/imx/imx-ic-prpencvf.c
>>> @@ -907,8 +907,6 @@ static void prp_try_fmt(struct prp_priv *priv,
>>>   		/* propagate colorimetry from sink */
>>>   		sdformat->format.colorspace = infmt->colorspace;
>>>   		sdformat->format.xfer_func = infmt->xfer_func;
>>> -		sdformat->format.quantization = infmt->quantization;
>>> -		sdformat->format.ycbcr_enc = infmt->ycbcr_enc;
>>>   	} else {
>>>   		v4l_bound_align_image(&sdformat->format.width,
>>>   				      MIN_W_SINK, MAX_W_SINK, W_ALIGN_SINK,
>>> @@ -916,9 +914,11 @@ static void prp_try_fmt(struct prp_priv *priv,
>>>   				      MIN_H_SINK, MAX_H_SINK, H_ALIGN_SINK,
>>>   				      S_ALIGN);
>>>
>>> -		imx_media_fill_default_mbus_fields(&sdformat->format, infmt,
>>> -						   true);
>>> +		if (sdformat->format.field == V4L2_FIELD_ANY)
>>> +			sdformat->format.field = V4L2_FIELD_NONE;
>>>   	}
>>> +
>>> +	imx_media_try_colorimetry(&sdformat->format, true);
>>>   }
>>>
>>>   static int prp_set_fmt(struct v4l2_subdev *sd,
>>> diff --git a/drivers/staging/media/imx/imx-media-csi.c b/drivers/staging/media/imx/imx-media-csi.c
>>> index 1d248aca40a9..dce4addadff4 100644
>>> --- a/drivers/staging/media/imx/imx-media-csi.c
>>> +++ b/drivers/staging/media/imx/imx-media-csi.c
>>> @@ -1375,9 +1375,15 @@ static void csi_try_field(struct csi_priv *priv,
>>>   	struct v4l2_mbus_framefmt *infmt =
>>>   		__csi_get_fmt(priv, cfg, CSI_SINK_PAD, sdformat->which);
>>>
>>> -	/* no restrictions on sink pad field type */
>>> -	if (sdformat->pad == CSI_SINK_PAD)
>>> +	/*
>>> +	 * no restrictions on sink pad field type except must
>>> +	 * be initialized.
>>> +	 */
>>> +	if (sdformat->pad == CSI_SINK_PAD) {
>>> +		if (sdformat->format.field == V4L2_FIELD_ANY)
>>> +			sdformat->format.field = V4L2_FIELD_NONE;
>>>   		return;
>>> +	}
>>>
>>>   	switch (infmt->field) {
>>>   	case V4L2_FIELD_SEQ_TB:
>>> @@ -1455,8 +1461,6 @@ static void csi_try_fmt(struct csi_priv *priv,
>>>   		/* propagate colorimetry from sink */
>>>   		sdformat->format.colorspace = infmt->colorspace;
>>>   		sdformat->format.xfer_func = infmt->xfer_func;
>>> -		sdformat->format.quantization = infmt->quantization;
>>> -		sdformat->format.ycbcr_enc = infmt->ycbcr_enc;
>>>
>>>   		break;
>>>   	case CSI_SINK_PAD:
>>> @@ -1476,10 +1480,6 @@ static void csi_try_fmt(struct csi_priv *priv,
>>>
>>>   		csi_try_field(priv, cfg, sdformat);
>>>
>>> -		imx_media_fill_default_mbus_fields(
>>> -			&sdformat->format, infmt,
>>> -			priv->active_output_pad == CSI_SRC_PAD_DIRECT);
>>> -
>>>   		/* Reset crop and compose rectangles */
>>>   		crop->left = 0;
>>>   		crop->top = 0;
>>> @@ -1495,6 +1495,9 @@ static void csi_try_fmt(struct csi_priv *priv,
>>>
>>>   		break;
>>>   	}
>>> +
>>> +	imx_media_try_colorimetry(&sdformat->format,
>>> +			priv->active_output_pad == CSI_SRC_PAD_DIRECT);
>>>   }
>>>
>>>   static int csi_set_fmt(struct v4l2_subdev *sd,
>>> diff --git a/drivers/staging/media/imx/imx-media-utils.c b/drivers/staging/media/imx/imx-media-utils.c
>>> index b41842dba5ec..05b63395084e 100644
>>> --- a/drivers/staging/media/imx/imx-media-utils.c
>>> +++ b/drivers/staging/media/imx/imx-media-utils.c
>>> @@ -511,21 +511,18 @@ int imx_media_init_cfg(struct v4l2_subdev *sd,
>>>   EXPORT_SYMBOL_GPL(imx_media_init_cfg);
>>>
>>>   /*
>>> - * Check whether the field and colorimetry parameters in tryfmt are
>>> - * uninitialized, and if so fill them with the values from fmt,
>>> - * or if tryfmt->colorspace has been initialized, all the default
>>> - * colorimetry params can be derived from tryfmt->colorspace.
>>> + * Default the colorspace in tryfmt to SRGB if set to an unsupported
>>> + * colorspace or not initialized. Then set the remaining colorimetry
>>> + * parameters based on the colorspace if they are uninitialized.
>>>    *
>>>    * tryfmt->code must be set on entry.
>>>    *
>>>    * If this format is destined to be routed through the Image Converter,
>>> - * quantization and Y`CbCr encoding must be fixed. The IC expects and
>>> - * produces fixed quantization and Y`CbCr encoding at its input and output
>>> - * (full range for RGB, limited range for YUV, and V4L2_YCBCR_ENC_601).
>>> + * Y`CbCr encoding must be fixed. The IC supports only BT.601 Y`CbCr
>>> + * or Rec.709 Y`CbCr encoding.
>>>    */
>>> -void imx_media_fill_default_mbus_fields(struct v4l2_mbus_framefmt *tryfmt,
>>> -					struct v4l2_mbus_framefmt *fmt,
>>> -					bool ic_route)
>>> +void imx_media_try_colorimetry(struct v4l2_mbus_framefmt *tryfmt,
>>> +			       bool ic_route)
>>>   {
>>>   	const struct imx_media_pixfmt *cc;
>>>   	bool is_rgb = false;
>>> @@ -533,44 +530,46 @@ void imx_media_fill_default_mbus_fields(struct v4l2_mbus_framefmt *tryfmt,
>>>   	cc = imx_media_find_mbus_format(tryfmt->code, CS_SEL_ANY, true);
>>>   	if (!cc)
>>>   		cc = imx_media_find_ipu_format(tryfmt->code, CS_SEL_ANY);
>>> -	if (cc && cc->cs != IPUV3_COLORSPACE_YUV)
>>> +	if (cc && cc->cs == IPUV3_COLORSPACE_RGB)
>>>   		is_rgb = true;
>>>
>>> -	/* fill field if necessary */
>>> -	if (tryfmt->field == V4L2_FIELD_ANY)
>>> -		tryfmt->field = fmt->field;
>> Have you tested this patch on i.MX7 ? It breaks pipeline validation as
>> the field field isn't handled anymore in imx7_csi_try_fmt(), due to the
>> removal if this code.
>>
>> I have a written a fix, I'll prepare a patch.
>>
> Somehow I missed completely this series. I do not recall it at all.
> Thanks in advance for your patch Laurent.
>
> ---
> Cheers,
> 	Rui
>
>>> +	switch (tryfmt->colorspace) {
>>> +	case V4L2_COLORSPACE_SMPTE170M:
>>> +	case V4L2_COLORSPACE_REC709:
>>> +	case V4L2_COLORSPACE_JPEG:
>>> +	case V4L2_COLORSPACE_SRGB:
>>> +	case V4L2_COLORSPACE_BT2020:
>>> +	case V4L2_COLORSPACE_OPRGB:
>>> +	case V4L2_COLORSPACE_DCI_P3:
>>> +	case V4L2_COLORSPACE_RAW:
>>> +		break;
>>> +	default:
>>> +		tryfmt->colorspace = V4L2_COLORSPACE_SRGB;
>>> +		break;
>>> +	}
>>> +
>>> +	if (tryfmt->xfer_func == V4L2_XFER_FUNC_DEFAULT)
>>> +		tryfmt->xfer_func =
>>> +			V4L2_MAP_XFER_FUNC_DEFAULT(tryfmt->colorspace);
>>>
>>> -	/* fill colorimetry if necessary */
>>> -	if (tryfmt->colorspace == V4L2_COLORSPACE_DEFAULT) {
>>> -		tryfmt->colorspace = fmt->colorspace;
>>> -		tryfmt->xfer_func = fmt->xfer_func;
>>> -		tryfmt->ycbcr_enc = fmt->ycbcr_enc;
>>> -		tryfmt->quantization = fmt->quantization;
>>> +	if (ic_route) {
>>> +		if (tryfmt->ycbcr_enc != V4L2_YCBCR_ENC_601 &&
>>> +		    tryfmt->ycbcr_enc != V4L2_YCBCR_ENC_709)
>>> +			tryfmt->ycbcr_enc = V4L2_YCBCR_ENC_601;
>>>   	} else {
>>> -		if (tryfmt->xfer_func == V4L2_XFER_FUNC_DEFAULT) {
>>> -			tryfmt->xfer_func =
>>> -				V4L2_MAP_XFER_FUNC_DEFAULT(tryfmt->colorspace);
>>> -		}
>>>   		if (tryfmt->ycbcr_enc == V4L2_YCBCR_ENC_DEFAULT) {
>>>   			tryfmt->ycbcr_enc =
>>>   				V4L2_MAP_YCBCR_ENC_DEFAULT(tryfmt->colorspace);
>>>   		}
>>> -		if (tryfmt->quantization == V4L2_QUANTIZATION_DEFAULT) {
>>> -			tryfmt->quantization =
>>> -				V4L2_MAP_QUANTIZATION_DEFAULT(
>>> -					is_rgb, tryfmt->colorspace,
>>> -					tryfmt->ycbcr_enc);
>>> -		}
>>>   	}
>>>
>>> -	if (ic_route) {
>>> -		tryfmt->quantization = is_rgb ?
>>> -			V4L2_QUANTIZATION_FULL_RANGE :
>>> -			V4L2_QUANTIZATION_LIM_RANGE;
>>> -		tryfmt->ycbcr_enc = V4L2_YCBCR_ENC_601;
>>> -	}
>>> +	if (tryfmt->quantization == V4L2_QUANTIZATION_DEFAULT)
>>> +		tryfmt->quantization =
>>> +			V4L2_MAP_QUANTIZATION_DEFAULT(is_rgb,
>>> +						      tryfmt->colorspace,
>>> +						      tryfmt->ycbcr_enc);
>>>   }
>>> -EXPORT_SYMBOL_GPL(imx_media_fill_default_mbus_fields);
>>> +EXPORT_SYMBOL_GPL(imx_media_try_colorimetry);
>>>
>>>   int imx_media_mbus_fmt_to_pix_fmt(struct v4l2_pix_format *pix,
>>>   				  struct v4l2_rect *compose,
>>> diff --git a/drivers/staging/media/imx/imx-media-vdic.c b/drivers/staging/media/imx/imx-media-vdic.c
>>> index 4487374c9435..fbafd7fb7aeb 100644
>>> --- a/drivers/staging/media/imx/imx-media-vdic.c
>>> +++ b/drivers/staging/media/imx/imx-media-vdic.c
>>> @@ -617,14 +617,13 @@ static void vdic_try_fmt(struct vdic_priv *priv,
>>>   				      &sdformat->format.height,
>>>   				      MIN_H, MAX_H_VDIC, H_ALIGN, S_ALIGN);
>>>
>>> -		imx_media_fill_default_mbus_fields(&sdformat->format, infmt,
>>> -						   true);
>>> -
>>>   		/* input must be interlaced! Choose SEQ_TB if not */
>>>   		if (!V4L2_FIELD_HAS_BOTH(sdformat->format.field))
>>>   			sdformat->format.field = V4L2_FIELD_SEQ_TB;
>>>   		break;
>>>   	}
>>> +
>>> +	imx_media_try_colorimetry(&sdformat->format, true);
>>>   }
>>>
>>>   static int vdic_set_fmt(struct v4l2_subdev *sd,
>>> diff --git a/drivers/staging/media/imx/imx-media.h b/drivers/staging/media/imx/imx-media.h
>>> index 6587aa49e005..23024c9bc887 100644
>>> --- a/drivers/staging/media/imx/imx-media.h
>>> +++ b/drivers/staging/media/imx/imx-media.h
>>> @@ -172,9 +172,8 @@ int imx_media_init_mbus_fmt(struct v4l2_mbus_framefmt *mbus,
>>>   			    const struct imx_media_pixfmt **cc);
>>>   int imx_media_init_cfg(struct v4l2_subdev *sd,
>>>   		       struct v4l2_subdev_pad_config *cfg);
>>> -void imx_media_fill_default_mbus_fields(struct v4l2_mbus_framefmt *tryfmt,
>>> -					struct v4l2_mbus_framefmt *fmt,
>>> -					bool ic_route);
>>> +void imx_media_try_colorimetry(struct v4l2_mbus_framefmt *tryfmt,
>>> +			       bool ic_route);
>>>   int imx_media_mbus_fmt_to_pix_fmt(struct v4l2_pix_format *pix,
>>>   				  struct v4l2_rect *compose,
>>>   				  const struct v4l2_mbus_framefmt *mbus,
>>> diff --git a/drivers/staging/media/imx/imx7-media-csi.c b/drivers/staging/media/imx/imx7-media-csi.c
>>> index a708a0340eb1..6e2f4c3eb24f 100644
>>> --- a/drivers/staging/media/imx/imx7-media-csi.c
>>> +++ b/drivers/staging/media/imx/imx7-media-csi.c
>>> @@ -1003,8 +1003,6 @@ static int imx7_csi_try_fmt(struct imx7_csi *csi,
>>>
>>>   		sdformat->format.colorspace = in_fmt->colorspace;
>>>   		sdformat->format.xfer_func = in_fmt->xfer_func;
>>> -		sdformat->format.quantization = in_fmt->quantization;
>>> -		sdformat->format.ycbcr_enc = in_fmt->ycbcr_enc;
>>>   		break;
>>>   	case IMX7_CSI_PAD_SINK:
>>>   		*cc = imx_media_find_mbus_format(sdformat->format.code,
>>> @@ -1015,14 +1013,14 @@ static int imx7_csi_try_fmt(struct imx7_csi *csi,
>>>   							 false);
>>>   			sdformat->format.code = (*cc)->codes[0];
>>>   		}
>>> -
>>> -		imx_media_fill_default_mbus_fields(&sdformat->format, in_fmt,
>>> -						   false);
>>>   		break;
>>>   	default:
>>>   		return -EINVAL;
>>>   		break;
>>>   	}
>>> +
>>> +	imx_media_try_colorimetry(&sdformat->format, false);
>>> +
>>>   	return 0;
>>>   }
>>>
>>> --
>>> 2.17.1
>>>


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