[PATCH v2 23/32] media: synopsys: csi2: Handle alignment requirement for width
From: Frank Li <Frank.Li@nxp.com>
Date: 2025-08-08 22:42:15
Also in:
imx, linux-arm-kernel, linux-devicetree, linux-media, linux-staging, lkml
Subsystem:
media input infrastructure (v4l/dvb), the rest · Maintainers:
Mauro Carvalho Chehab, Linus Torvalds
bpp * width must align to 8. Use media_bus_fmt_to_csi2_bpp() and v4l_get_required_align_by_bpp() to get width's alignment requirement. Signed-off-by: Frank Li <Frank.Li@nxp.com> --- drivers/media/platform/synopsys/mipi-csi2.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+)
diff --git a/drivers/media/platform/synopsys/mipi-csi2.c b/drivers/media/platform/synopsys/mipi-csi2.c
index dcad69cea99f3172786156699513f8cc8771ad2a..5c41b9570dcb97f58018bbaba1dc67a3c120a60b 100644
--- a/drivers/media/platform/synopsys/mipi-csi2.c
+++ b/drivers/media/platform/synopsys/mipi-csi2.c@@ -11,6 +11,7 @@ #include <linux/io.h> #include <linux/iopoll.h> #include <linux/irq.h> +#include <linux/limits.h> #include <linux/module.h> #include <linux/of_graph.h> #include <linux/platform_device.h>
@@ -664,15 +665,31 @@ static int csi2_set_fmt(struct v4l2_subdev *sd, { struct dw_mipi_csi2_dev *csi2 = sd_to_dev(sd); struct v4l2_mbus_framefmt *fmt; + u32 align; + u32 bpp; if (sdformat->pad >= (csi2->num_src_pads + csi2->num_sink_pads)) return -EINVAL; + /* + * The CSIS can't transcode in any way, the source format can't be + * modified. + */ + if (sdformat->pad < csi2->num_src_pads) + return v4l2_subdev_get_fmt(sd, sd_state, sdformat); + guard(mutex)(&csi2->lock); if (csi2->stream_count > 0) return -EBUSY; + bpp = media_bus_fmt_to_csi2_bpp(sdformat->format.code); + + align = v4l_get_required_align_by_bpp(bpp, 3); /* need align to 2^3 */ + + v4l_bound_align_image(&sdformat->format.width, 1, U16_MAX, align, + &sdformat->format.height, 1, U16_MAX, 0, 0); + /* Output pads mirror active input pad, no limits on input pads */ if (!(csi2->config->sink_pad_mask & BIT(sdformat->pad))) sdformat->format = csi2->format_mbus;
--
2.34.1
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