intel_dsb_prepare(9)

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

okay so picture this: you're deep in the kernel API manual, section 9, and you stumble on intel_dsb_prepare. that's the one we're doing today. she allocates, she pins, she maps — she does it ALL. main character energy fr fr. ✨

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🌸 SYNOPSIS 🌸

struct intel_dsb * intel_dsb_prepare (struct intel_atomic_state *state ,
struct intel_crtc *crtc , enum intel_dsb_id dsb_id , unsigned int
max_cmds );

like, four whole arguments. she's thorough. we love that for her. 🫶

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🦋 ARGUMENTS 🦋

• state — the atomic state. you know the vibe. ✨
• crtc — the CRTC. iconic as always.
• dsb_id — which DSB engine we're using, iykyk. 👑
• max_cmds — the number of commands we need to fit into the command buffer. yes, need. plan ahead bestie, no cap. 💅

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💖 DESCRIPTION 💖

so what does she actually DO? this function prepares the command buffer — the very buffer that's used to store dsb instructions with data. that's it, that's the whole job. not me being obsessed with a buffer but here we are. 🍓

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⭐ RETURN ⭐

• on success you get the DSB context — slay 💜
• on failure you get NULL — and yeah, that's the whole failure story. check it, bestie. 🙈

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/gpu/drm/i915/display/intel_dsb.c
• DSB(9)
• intel_dsb_reg_write_indexed(9)
• intel_dsb_commit(9)
• intel_dsb_cleanup(9)

like a little friend group. the whole squad. go read them too fr fr. 🧚

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ngl, if she hands you back NULL, that's a failure. do not proceed. treat it like a vibe check you did NOT pass. 😭

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and that's the page! 🎀 this little love letter lives in ./drivers/gpu/drm/i915/display, stamped October 2026, and it's the intel_dsb_prepare(9) page — that's a wrap bestie, go allocate something beautiful. 💖🌸⭐