STRUCT OUTPUT_REPORT_HEADER(9)

💖 struct output_report_header(9) 💖

okay bestie, so we're deep in the Kernel API Manual (section 9, the big-kid kernel structures section, iykyk) and today's main character is struct output_report_header — literally the output report header definition in the HIDSPI protocol. it's giving "small struct, big responsibilities" and honestly? we're obsessed. 🎀

✨ SYNOPSIS ✨

struct output_report_header {
    u8 report_type;
    __le16 content_len;
    u8 content_id;
 };

like, that's the whole thing. three fields. no cap, she's compact. 🦋

🌸 Members 🌸

• report_type — the output report type, and it's a reference to enum output_report_type (go look it up, bestie, it's right there 💅)
• content_len — length of content. that's it. that's the field. __le16 so mind your endianness, fr fr. ⭐
• content_id — okay this one's the multitasker of the group and it depends on context, so listen up:
  • 0x00 — descriptors report id 🌈
  • Set/Feature feature 🌸
  • or Input/Output Reports command opcode — for commands 👑

literally "it depends" energy but make it kernel, and we respect it. 💜

🦋 SEE ALSO 🦋

• Kernel file ./include/linux/hid-over-spi.h
• struct input_report_body_header(9)
• struct input_report_body(9)
• struct output_report(9)
• struct hidspi_dev_descriptor(9)

go read those next, bestie, they're all in the same friend group 🫶

okay that's the whole page, mwah. 💖 this icon lives in ./include/linux, dated October 2026, and she answers to struct output_report_header(9) — periodt. 👑✨