[PATCH 18/22] [media] imx-ipuv3-csi: support downsizing

Philipp Zabel
2016-10-07T16:01:22Z

Add support for the CSI internal horizontal and vertical downsizing.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
---
drivers/media/platform/imx/imx-ipuv3-csi.c | 20 ++++++++++++++------
1 file changed, 14 insertions(+), 6 deletions(-)

diff --git a/drivers/media/platform/imx/imx-ipuv3-csi.c b/drivers/media/platform/imx/imx-ipuv3-csi.c
index 699460e6..e8a6a7b 100644
--- a/drivers/media/platform/imx/imx-ipuv3-csi.c
+++ b/drivers/media/platform/imx/imx-ipuv3-csi.c
@@ -167,8 +167,16 @@ static int ipucsi_subdev_set_format(struct v4l2_subdev *sd,
width = clamp_t(unsigned int, sdformat->format.width, 16, 8192);
height = clamp_t(unsigned int, sdformat->format.height, 16, 4096);
} else {
- width = ipucsi->format_mbus[0].width;
- height = ipucsi->format_mbus[0].height;
+ if (sdformat->format.width <
+ (ipucsi->format_mbus[0].width * 3 / 4))
+ width = ipucsi->format_mbus[0].width / 2;
+ else
+ width = ipucsi->format_mbus[0].width;
+ if (sdformat->format.height <
+ (ipucsi->format_mbus[0].height * 3 / 4))
+ height = ipucsi->format_mbus[0].height / 2;
+ else
+ height = ipucsi->format_mbus[0].height;
}

mbusformat = __ipucsi_get_pad_format(sd, cfg, sdformat->pad,
@@ -212,14 +220,14 @@ static int ipucsi_subdev_s_stream(struct v4l2_subdev *sd, int enable)
window.width = fmt[0].width;
window.height = fmt[0].height;
ipu_csi_set_window(ipucsi->csi, &window);
+ ipu_csi_set_downsize(ipucsi->csi,
+ fmt[0].width == 2 * fmt[1].width,
+ fmt[0].height == 2 * fmt[1].height);

/* Is CSI data source MCT (MIPI)? */
mux_mct = (mbus_config.type == V4L2_MBUS_CSI2);
-
ipu_set_csi_src_mux(ipucsi->ipu, ipucsi->id, mux_mct);
- if (mux_mct)
- ipu_csi_set_mipi_datatype(ipucsi->csi, /*VC*/ 0,
- &fmt[0]);
+ ipu_csi_set_mipi_datatype(ipucsi->csi, /*VC*/ 0, &fmt[0]);

ret = ipu_csi_init_interface(ipucsi->csi, &mbus_config,
&fmt[0]);
--
2.9.3