STRUCT V4L2_ISP_PARAMS_BLOCK_TYPE_INFO(9)

💅 struct v4l2_isp_params_block_type_info(9) — from the Kernel API Manual, bestie 🎀

okay so picture this: you're deep in the kernel, hanging out in the media subsystem, and you need the tea on V4L2 ISP params per-block-type info. That's literally what this struct is for. Let's get into it ✨

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🌸 NAME 🌸

struct v4l2_isp_params_block_type_info — the V4L2 ISP params per-block-type info. That's the whole vibe. 💖

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🦋 SYNOPSIS 🦋

struct v4l2_isp_params_block_type_info {
    size_t size;
    int (*block_validate)(struct device *dev, const struct
v4l2_isp_block_header *block);
 };

yep that's the shape of it, no cap. Two members, one job. 🫶

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👑 Members 👑

• size — the block type expected size. literally just how big this block type is supposed to be. 📏
• block_validate — the driver's callback to implement per-block validation. this is where you (the driver) get to do your little check-and-approve moment. 💅

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🌈 Description 🌈

So the v4l2_isp_params_block_type_info collects information of the ISP configuration block types for validation purposes. That's its whole main character energy. ✨

It contains the expected block type size, plus a function pointer where drivers can register a callback for additional per-block validation purposes. The validation function is expected to return 0 on success, or a negative error number for errors. So like — zero means slay, negative means something went wrong, and the kernel will know. 🔥

Drivers shall prepare a list of block type info, indexed by block type, one for each supported ISP block type, and correctly populate them with the expected block type size and the optional callback. fr fr, don't skip a block type — every single supported one gets an entry, and it's indexed by block type so the lookup just works. 🧚

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⭐ SEE ALSO ⭐

• Kernel file ./include/media/v4l2-isp.h 💜
• v4l2_isp_buffer_size(9)
• v4l2_isp_params_validate_buffer_size(9)
• v4l2_isp_params_validate_buffer(9)
• struct v4l2_isp_stats_block_type_info(9)
• v4l2_isp_stats_init_buffer(9)
• v4l2_isp_stats_init_block(9)

go read those next, iykyk 🌸

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and that's the page!! mwah 💋 — this one lives in ./include/media, and it's dated October 2026, so mark your calendar bestie 🎀🦋💖