wireguard-linux/drivers/media/platform/nxp, branch stable

media: nxp: imx8-isi: Add additional 32-bit RGB format support

2026-07-31T07:13:10Z

Add support for additional 32-bit RGB pixel formats (BGRA32, RGBA32, BGRX32, RGBX32, ARGB2101010). Formats with alpha channel (BGRA32, RGBA32) only support capture as ISI ignores alpha bits when reading from memory. Signed-off-by: Robert Chiras Reviewed-by: Frank Li Tested-by: Laurent Pinchart Signed-off-by: Guoniu Zhou Reviewed-by: Laurent Pinchart Reviewed-by: Loic Poulain Link: https://patch.msgid.link/20260728-isi-v5-4-1d22ab91602a@oss.nxp.com Signed-off-by: Laurent Pinchart Signed-off-by: Hans Verkuil

media: nxp: imx8-isi: Add 16-bit raw Bayer format support

2026-07-31T07:13:10Z

Add support for 16-bit raw Bayer formats (SBGGR16, SGBRG16, SGRBG16, SRGGB16) to both the pipeline subdev and video capture interface. These formats are used by image sensors that output 16-bit raw data, enabling the ISI to capture full dynamic range from such sensors. Signed-off-by: Laurentiu Palcu Reviewed-by: Frank Li Reviewed-by: Laurent Pinchart Signed-off-by: Guoniu Zhou Reviewed-by: Loic Poulain Link: https://patch.msgid.link/20260728-isi-v5-3-1d22ab91602a@oss.nxp.com Signed-off-by: Laurent Pinchart Signed-off-by: Hans Verkuil

media: nxp: imx8-isi: Implement per-stream reference counting for multiplexed streams

2026-07-31T07:13:10Z

The ISI crossbar needs to properly enable multiple streams from different virtual channels on the same input pad. Currently only the first stream gets enabled in hardware, subsequent streams are silently ignored. The driver uses a single enable_count per input to track the input state. When enable_count is non-zero, the code assumes the input is already active and skips calling v4l2_subdev_enable_streams() for additional streams: Call 1: enable_streams(stream 0) -> enable_count == 0, enable gasket and stream 0 in hardware -> enable_count = 1 Call 2: enable_streams(stream 1) -> enable_count == 1, skip hardware enable -> enable_count = 2 -> stream 1 never gets enabled Similarly on disable, when enable_count reaches zero, ALL streams are disabled regardless of which streams are actually still active. Implement per-stream state tracking by storing the input index and stream mask in the mxc_isi_pipe structure. On enable, record which input and stream the pipe is receiving. On disable, clear the pipe's record and check if any other pipe is still using the same input stream before actually disabling it. Signed-off-by: Guoniu Zhou Reviewed-by: Laurent Pinchart Reviewed-by: Frank Li Link: https://patch.msgid.link/20260728-isi-v5-2-1d22ab91602a@oss.nxp.com Signed-off-by: Laurent Pinchart Signed-off-by: Hans Verkuil

media: nxp: imx8-isi: Use BIT_ULL() for 64-bit stream masks

2026-07-31T07:13:10Z

Use BIT_ULL() instead of BIT() for u64 stream masks to avoid incorrect results on 32-bit architectures when stream IDs are 32 or greater. Fixes: cf21f328fcaf ("media: nxp: Add i.MX8 ISI driver") Cc: stable@vger.kernel.org Signed-off-by: Guoniu Zhou Reviewed-by: Laurent Pinchart Reviewed-by: Frank Li Reviewed-by: Loic Poulain Link: https://patch.msgid.link/20260728-isi-v5-1-1d22ab91602a@oss.nxp.com Signed-off-by: Laurent Pinchart Signed-off-by: Hans Verkuil

media: nxp: imx8-isi: Correct color map between V4L2 and ISI

2026-07-31T07:13:10Z

Fix the ISI input format for the color map V4L2_PIX_FMT_XBGR32 in memory-to-memory mode. Fixes: cf21f328fcaf ("media: nxp: Add i.MX8 ISI driver") Cc: stable@vger.kernel.org Signed-off-by: Guoniu Zhou Tested-by: Laurent Pinchart Reviewed-by: Laurent Pinchart Reviewed-by: Frank Li Link: https://patch.msgid.link/20260720-isi-v2-5-45845bc5d4fa@oss.nxp.com Signed-off-by: Laurent Pinchart Signed-off-by: Hans Verkuil

media: nxp: imx8-isi: Add stream ID validation for crossbar routing

2026-07-31T07:13:10Z

Add validation to enforce hardware constraints that were previously missing in the crossbar routing configuration: - SOURCE stream must be 0 (ISI pipes are hardcoded to stream 0) This check complements the existing memory input validation and ensures that all routing configurations respect hardware limitations. Signed-off-by: Guoniu Zhou Reviewed-by: Laurent Pinchart Link: https://patch.msgid.link/20260720-isi-v2-2-45845bc5d4fa@oss.nxp.com Signed-off-by: Laurent Pinchart Signed-off-by: Hans Verkuil

media: nxp: imx8-isi: Fix stream ID validation bypass in crossbar routing

2026-07-31T07:13:10Z

The crossbar routing validation has a critical bug where it validates the wrong routing table, allowing userspace to bypass validation entirely. The __mxc_isi_crossbar_set_routing() function is called to validate and apply a new routing table from userspace. However, the validation loop iterates over state->routing (the currently active routing table) instead of the routing parameter (the new table being validated): for_each_active_route(&state->routing, route) { This means userspace can submit any invalid routing configuration and it will pass validation as long as the currently active routing is valid. This is a security issue as it allows userspace to configure routes that violate hardware constraints, potentially causing undefined hardware behavior. Fix by validating the routing table that will actually be applied. Fixes: cf21f328fcaf ("media: nxp: Add i.MX8 ISI driver") Cc: stable@vger.kernel.org Signed-off-by: Guoniu Zhou Reviewed-by: Laurent Pinchart Reviewed-by: Frank Li Link: https://patch.msgid.link/20260720-isi-v2-1-45845bc5d4fa@oss.nxp.com Signed-off-by: Laurent Pinchart Signed-off-by: Hans Verkuil

media: nxp: imx8-isi: Add virtual channel support

2026-07-31T07:13:10Z

The ISI supports different numbers of virtual channels depending on the platform. i.MX95 supports 8 virtual channels, and i.MX8QXP/QM support 4 virtual channels. They are used in multiple camera use cases, such as surround view. Other platforms (such as i.MX8/MN/MP/ULP/91/93) don't support virtual channels, and the VC_ID bits are marked as read-only. Reviewed-by: Frank Li Signed-off-by: Guoniu Zhou Reviewed-by: Laurent Pinchart Link: https://patch.msgid.link/20260521-isi_vc-v5-2-a38eb4fcd58e@oss.nxp.com Signed-off-by: Laurent Pinchart Signed-off-by: Hans Verkuil

media: nxp: imx8-isi: crossbar: Add get_frame_desc operation

2026-07-31T07:13:10Z

Implement the get_frame_desc pad operation for the crossbar subdev using the v4l2_subdev_get_frame_desc_passthrough() helper. This allows the crossbar to properly propagate frame descriptors from its sink pads to its source pads, which is necessary for proper stream configuration in multiplexed streams scenarios. Signed-off-by: Guoniu.zhou Reviewed-by: Laurent Pinchart Link: https://patch.msgid.link/20260521-isi_vc-v5-1-a38eb4fcd58e@oss.nxp.com Signed-off-by: Laurent Pinchart Signed-off-by: Hans Verkuil

media: nxp: imx8-isi: Drop unneeded downscaling factor clamping

2026-07-31T07:13:10Z

The total scaling factor including bi-linear downscaling and decimation is clamped to 16. The bilinear factor calculation therefore produceds values guaranteed not to exceed the maximum factor of 2.0. The clamping is unneeded, drop it. Note that the ISI_DOWNSCALE_THRESHOLD value of 0x4000 is incorrect, as that would be a factor of 4.0. This was inconsequential given that the computed factor never exceeded 0x2000. Reviewed-by: Frank Li Reviewed-by: Guoniu Zhou Link: https://patch.msgid.link/20260520202738.86782-1-laurent.pinchart@ideasonboard.com Signed-off-by: Laurent Pinchart Signed-off-by: Hans Verkuil