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

Steve Longerbeam
2019-10-22T03:26:45Z

Hi Laurent,

On 10/21/19 6:44 PM, 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 ?

Nope.

> It breaks pipeline validation as
> the field field isn't handled anymore in imx7_csi_try_fmt(), due to the
> removal if this code.

Yep, patches crossed paths.
>
> I have a written a fix, I'll prepare a patch.

Please do, thanks.

Steve

>> + 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
>>