drm_dsc_com...c_parameters(9)

✨ drm_dsc_compute_rc_parameters(9) ✨

okay so bestie, welcome to the kernel API manual 💅 this one's from section 9, and it's literally all about drm_dsc_compute_rc_parameters — the glow-up function that makes your DSC rate control params actually exist 🎀

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🌸 NAME 🌸

drm_dsc_compute_rc_parameters — the function that writes rate control parameters into the dsc configuration defined in &struct drm_dsc_config, all in accordance with the DSC 1.2 specification. no cap, that's the whole vibe. ⭐

heads up though: some configuration fields must be present beforehand — so like, do your homework first, don't just roll up empty-handed 🙈

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🦋 SYNOPSIS 🦋

int drm_dsc_compute_rc_parameters (struct drm_dsc_config *vdsc_cfg );

it's giving int return, it's giving pointer-to-config, it's giving iconic 🔥

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👑 ARGUMENTS 👑

• vdsc_cfg — DSC Configuration data that's been partially filled by the driver. key word: partially. you bring the half-finished config, this function handles the rate control rest 🫶

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💖 SEE ALSO 💖

like, go read these too, they're all lowkey essential and also kind of the friend group of this function 🌈

• Kernel file ./drivers/gpu/drm/display/drm_dsc_helper.c — the source file where all the dsc helpers live, main character energy fr fr
• dsc helpers(9)
• drm_dsc_dp_pps_header_init(9)
• drm_dsc_dp_rc_buffer_size(9)
• drm_dsc_pps_payload_pack(9)
• drm_dsc_set_const_params(9)
• drm_dsc_set_rc_buf_thresh(9)
• drm_dsc_setup_rc_params(9)
• drm_dsc_get_bpp_int(9)
• drm_dsc_initial_scale_value(9)
• drm_dsc_flatness_det_thresh(9)
• drm_dsc_dump_config(9)

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anyway bestie that's the whole page, you ate it, you understood it, periodt 💜

🧚 sign-off cuteness: this lil doc comes from ./drivers/gpu/drm/display, dated October 2026, and lives in the Kernel API Manual — go forth and compute those rc parameters, iykyk 💅✨