On Thu, 2018-05-31 at 17:30 -0700, Steve Longerbeam wrote:
> The output pad's field type was being passed to ipu_csi_init_interface(),
> in order to deal with field type 'alternate' at the sink pad, which
> is not understood by ipu_csi_init_interface().
>
> Remove that code and pass the sink pad field to ipu_csi_init_interface().
> The latter function will have to explicity deal with field type 'alternate'
> when setting up the CSI interface for BT.656 busses.
I fear this won't be enough. If we want to capture
sink:ALTERNATE/SEQ_TB/SEQ_BT -> src:SEQ_TB we have to configure the CSI
differently than if we want to capture
ALTERNATE/SEQ_TB/SEQ_BT -> src:SEQ_BT. (And differently for NTSC and
PAL). For NTSC sink:ALTERNATE should behave like sink:SEQ_BT, and for
PAL sink:ALTERNATE should behave like sink:SEQ_TB.
Interweaving SEQ_TB to INTERLACED_TB should work right now, but to
interweave SEQ_BT to INTERLACED_BT, we need to add one line offset to
the frame start and use a negative interlaced scanline offset.
regards
Philipp
> Reported-by: Krzysztof Hałasa <khal...@piap.pl>
> Signed-off-by: Steve Longerbeam <steve_longerb...@mentor.com>
> ---
> drivers/staging/media/imx/imx-media-csi.c | 13 ++-----------
> 1 file changed, 2 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/staging/media/imx/imx-media-csi.c
> b/drivers/staging/media/imx/imx-media-csi.c
> index 95d7805..9bc555c 100644
> --- a/drivers/staging/media/imx/imx-media-csi.c
> +++ b/drivers/staging/media/imx/imx-media-csi.c
> @@ -629,12 +629,10 @@ static void csi_idmac_stop(struct csi_priv *priv)
> /* Update the CSI whole sensor and active windows */
> static int csi_setup(struct csi_priv *priv)
> {
> - struct v4l2_mbus_framefmt *infmt, *outfmt;
> + struct v4l2_mbus_framefmt *infmt;
> struct v4l2_mbus_config mbus_cfg;
> - struct v4l2_mbus_framefmt if_fmt;
>
> infmt = &priv->format_mbus[CSI_SINK_PAD];
> - outfmt = &priv->format_mbus[priv->active_output_pad];
>
> /* compose mbus_config from the upstream endpoint */
> mbus_cfg.type = priv->upstream_ep.bus_type;
> @@ -642,20 +640,13 @@ static int csi_setup(struct csi_priv *priv)
> priv->upstream_ep.bus.mipi_csi2.flags :
> priv->upstream_ep.bus.parallel.flags;
>
> - /*
> - * we need to pass input frame to CSI interface, but
> - * with translated field type from output format
> - */
> - if_fmt = *infmt;
> - if_fmt.field = outfmt->field;
> -
> ipu_csi_set_window(priv->csi, &priv->crop);
>
> ipu_csi_set_downsize(priv->csi,
> priv->crop.width == 2 * priv->compose.width,
> priv->crop.height == 2 * priv->compose.height);
>
> - ipu_csi_init_interface(priv->csi, &mbus_cfg, &if_fmt);
> + ipu_csi_init_interface(priv->csi, &mbus_cfg, infmt);
>
> ipu_csi_set_dest(priv->csi, priv->dest);
>
