_ishtp_read_hdr(9)

💖 _ishtp_read_hdr — like, the manual page, but make it make sense 💖

okay so bestie, this one lives in the Kernel API Manual (yes, the Kernel API manual, we're in the big leagues now ✨) and it is genuinely so simple it's iconic. no cap.

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🌸 NAME 🌸

_ishtp_read_hdr — reads the message header. that's it. that's the whole job. she's a one-trick pony and she ate. 💅

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🎀 SYNOPSIS 🎀

uint32_t _ishtp_read_hdr (const struct ishtp_device *dev );

one function, one argument, one return type. lowkey elegant. 🦋

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✨ ARGUMENTS ✨

• dev — the ISHTP device pointer, aka your little handle on the device itself. hand her the device, she does the thing. 🫶

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🧚 DESCRIPTION 🧚

so here's the vibe: this function reads the header. specifically, a header of 32bit length. that's the whole description. no secret extra lore, no hidden caveats, just "read header of 32bit length" and honestly? we respect the brevity. main character energy fr fr. 💜

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🔥 RETURN 🔥

she returns the read register value. that's the value you get back, bestie — the thing you came for. 🍓

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👑 SEE ALSO 👑

okay this is the part where the friend group shows up. the kernel file ./drivers/hid/intel-ish-hid/ipc/ipc.c is home base, and these are all the siblings — listed here in their exact original order because we do not shuffle the group chat:

ish_reg_read(9), ish_reg_write(9), _ish_read_fw_sts_reg(9), check_generated_interrupt(9), ish_is_input_ready(9), set_host_ready(9), ishtp_fw_is_ready(9), ish_set_host_rdy(9), ish_clr_host_rdy(9), ish_set_host_ready(9), _ishtp_read(9), write_ipc_from_queue(9), write_ipc_to_queue(9), ipc_send_mng_msg(9), timed_wait_for_timeout(9), ish_fw_reset_handler(9), fw_reset_work_fn(9), _ish_sync_fw_clock(9), recv_ipc(9), ish_irq_handler(9), ish_disable_dma(9), ish_wakeup(9), _ish_hw_reset(9), _ish_ipc_reset(9), ish_hw_start(9), ish_ipc_get_header(9), _dma_no_cache_snooping(9), ish_dev_init(9), ish_device_disable(9)

like, that's the whole squad. go read them too, iykyk. 🌈

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quick vibe check reminder: this page is filed under ./drivers/hid/intel-ish-hid/ipc, so if you're lost, that's where the source lives. 💀

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and that's the page!! mwah 💋 source path is ./drivers/hid/intel-ish-hid/ipc and it's dated October 2026 — so mark your calendars, she's from the future, periodt. 🎀✨💖