Merge tag 'media/v6.19-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media

Pull media updates from Mauro Carvalho Chehab:

 - New drivers:
    - Mali-C55 ISP
    - Rockchip VICAP (RKCIF)
    - RKVDEC HEVC Decoder
    - Renesas RZV2H IVC
    - Sony IMX111 CMOS sensor driver

 - Removed STi C8SECTPFE Driver

 - Added a V4L2 ISP generic framework

 - Usual set of cleanup, fixes and driver improvements

* tag 'media/v6.19-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (249 commits)
  media: rockchip: rkcif: add support for rk3568 vicap mipi capture
  media: rockchip: rkcif: add support for rk3568 vicap dvp capture
  media: rockchip: rkcif: add support for px30 vip dvp capture
  media: rockchip: rkcif: add abstraction for dma blocks
  media: rockchip: rkcif: add abstraction for interface and crop blocks
  media: rockchip: add driver for the rockchip camera interface
  media: dt-bindings: add rockchip rk3568 vicap
  media: dt-bindings: add rockchip px30 vip
  media: dt-bindings: video-interfaces: add defines for sampling modes
  Documentation: admin-guide: media: add rockchip camera interface
  media: mali-c55: Mark pm handlers as __maybe_unused
  media: mali-c55: Assert ISP blocks size correctness
  media: v4l2-isp: Rename block_info to block_type_info
  MAINTAINERS: Add entry for rzv2h-ivc driver
  media: platform: Add Renesas Input Video Control block driver
  dt-bindings: media: Add bindings for the RZ/V2H(P) IVC block
  Documentation: media: mali-c55: Document the mali-c55 parameter setting
  media: platform: Add mali-c55 parameters video node
  media: uapi: Add parameters structs to mali-c55-config.h
  media: mali-c55: Add image formats for Mali-C55 parameters buffer
  ...

1 files changed, 132 insertions, 0 deletions

diff --git a/drivers/media/v4l2-core/v4l2-isp.c b/drivers/media/v4l2-core/v4l2-isp.c
new file mode 100644
index 000000000000..29831f7032e9
--- /dev/null
+++ b/drivers/media/v4l2-core/v4l2-isp.c
@@ -0,0 +1,132 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Video4Linux2 generic ISP parameters and statistics support
+ *
+ * Copyright (C) 2025 Ideas On Board Oy
+ * Author: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
+ */
+
+#include <media/v4l2-isp.h>
+
+#include <linux/bitops.h>
+#include <linux/device.h>
+
+#include <media/videobuf2-core.h>
+
+int v4l2_isp_params_validate_buffer_size(struct device *dev,
+					 struct vb2_buffer *vb,
+					 size_t max_size)
+{
+	size_t header_size = offsetof(struct v4l2_isp_params_buffer, data);
+	size_t payload_size = vb2_get_plane_payload(vb, 0);
+
+	/* Payload size can't be greater than the destination buffer size */
+	if (payload_size > max_size) {
+		dev_dbg(dev, "Payload size is too large: %zu\n", payload_size);
+		return -EINVAL;
+	}
+
+	/* Payload size can't be smaller than the header size */
+	if (payload_size < header_size) {
+		dev_dbg(dev, "Payload size is too small: %zu\n", payload_size);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(v4l2_isp_params_validate_buffer_size);
+
+int v4l2_isp_params_validate_buffer(struct device *dev, struct vb2_buffer *vb,
+				    const struct v4l2_isp_params_buffer *buffer,
+				    const struct v4l2_isp_params_block_type_info *type_info,
+				    size_t num_block_types)
+{
+	size_t header_size = offsetof(struct v4l2_isp_params_buffer, data);
+	size_t payload_size = vb2_get_plane_payload(vb, 0);
+	size_t block_offset = 0;
+	size_t buffer_size;
+
+	/*
+	 * Currently only the first version of the V4L2 ISP parameters format is
+	 * supported. We accept both V0 and V1 to support existing drivers
+	 * compatible with V4L2 ISP that use either 0 or 1 as their "first
+	 * version" identifiers.
+	 */
+	if (buffer->version != V4L2_ISP_PARAMS_VERSION_V0 &&
+	    buffer->version != V4L2_ISP_PARAMS_VERSION_V1) {
+		dev_dbg(dev,
+			"Unsupported V4L2 ISP parameters format version: %u\n",
+			buffer->version);
+		return -EINVAL;
+	}
+
+	/* Validate the size reported in the header */
+	buffer_size = header_size + buffer->data_size;
+	if (buffer_size != payload_size) {
+		dev_dbg(dev, "Data size %zu and payload size %zu are different\n",
+			buffer_size, payload_size);
+		return -EINVAL;
+	}
+
+	/* Walk the list of ISP configuration blocks and validate them. */
+	buffer_size = buffer->data_size;
+	while (buffer_size >= sizeof(struct v4l2_isp_params_block_header)) {
+		const struct v4l2_isp_params_block_type_info *info;
+		const struct v4l2_isp_params_block_header *block;
+
+		block = (const struct v4l2_isp_params_block_header *)
+			(buffer->data + block_offset);
+
+		if (block->type >= num_block_types) {
+			dev_dbg(dev,
+				"Invalid block type %u at offset %zu\n",
+				block->type, block_offset);
+			return -EINVAL;
+		}
+
+		if (block->size > buffer_size) {
+			dev_dbg(dev, "Premature end of parameters data\n");
+			return -EINVAL;
+		}
+
+		/* It's invalid to specify both ENABLE and DISABLE. */
+		if ((block->flags & (V4L2_ISP_PARAMS_FL_BLOCK_ENABLE |
+				     V4L2_ISP_PARAMS_FL_BLOCK_DISABLE)) ==
+		     (V4L2_ISP_PARAMS_FL_BLOCK_ENABLE |
+		     V4L2_ISP_PARAMS_FL_BLOCK_DISABLE)) {
+			dev_dbg(dev, "Invalid block flags %x at offset %zu\n",
+				block->flags, block_offset);
+			return -EINVAL;
+		}
+
+		/*
+		 * Match the block reported size against the type info provided
+		 * one, but allow the block to only contain the header in
+		 * case it is going to be disabled.
+		 */
+		info = &type_info[block->type];
+		if (block->size != info->size &&
+		    (!(block->flags & V4L2_ISP_PARAMS_FL_BLOCK_DISABLE) ||
+		    block->size != sizeof(*block))) {
+			dev_dbg(dev,
+				"Invalid block size %u (expected %zu) at offset %zu\n",
+				block->size, info->size, block_offset);
+			return -EINVAL;
+		}
+
+		block_offset += block->size;
+		buffer_size -= block->size;
+	}
+
+	if (buffer_size) {
+		dev_dbg(dev, "Unexpected data after the parameters buffer end\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(v4l2_isp_params_validate_buffer);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Jacopo Mondi <jacopo.mondi@ideasonboard.com");
+MODULE_DESCRIPTION("V4L2 generic ISP parameters and statistics helpers");