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

Laurent Pinchart
2019-10-22T01:44:49Z

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.

> + 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
>

--
Regards,

Laurent Pinchart