intel_gvt_i...e_gmbus_read(9)

💅 intel_gvt_i...e_gmbus_read — a Kernel API Manual moment

okay so bestie, welcome to the Kernel API Manual ✨ this one's a little function with a big job: emulating a gmbus register mmio read. yes, mmio. no cap, it's important. let's get into it 🫶

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🌸 NAME 🌸

intel_gvt_i2c_handle_gmbus_read — literally the function that emulates gmbus register mmio read 💫

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🎀 SYNOPSIS 🎀

int intel_gvt_i2c_handle_gmbus_read (struct intel_vgpu *vgpu , unsigned
int offset , void *p_data , unsigned int bytes );

like, exactly that. character for character. don't come for me 🔥

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🦋 ARGUMENTS 🦋

• vgpu — a vGPU 👑 (that's a virtual GPU, she's the main character here)
• offset — reg offset, i.e. where in the register we're lookin' 👀
• p_data — data return buffer, the little bucket where the data goes 🍓
• bytes — access data length, how many bytes we're grabbing 💜

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✨ DESCRIPTION ✨

so this function is used to emulate gmbus register mmio read 🧚 that's the whole vibe. she reads the register, she hands the data back through the buffer, and it all just works. iconic behavior, honestly 💅

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⭐ RETURN ⭐

• Zero on success 🎉
• negative error code if failed 😭 (fr fr, check it)

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/gpu/drm/i915/gvt/edid.c — the whole source file, bestie 📁
• intel_gvt_i2c_handle_gmbus_write(9) — her sister function, the write counterpart ✍️
• intel_gvt_i2c_handle_aux_ch_write(9) — the aux channel one, also worth a peek 🦋
• intel_vgpu_init_i2c_edid(9) — the setup one, init energy only 💫

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and that's the page, bestie! 🩷 this little gem lives over in ./drivers/gpu/drm/i915/gvt and it's dated October 2026 — so mark your calendars, screenshot it, send it to the group chat, whatever you need 💌 ily, go read some registers 💅✨