dcss_scaler_filter_design(9)

🦋 dcss_scaler_filter_design(9) 🦋

okay bestie, welcome to this page from the Kernel API Manual — it’s giving kernel-doc but make it cute. This one is all about dcss_scaler_filter_design, and honestly it’s a little baddie that computes filter coefficients using a Gaussian filter. periodt ✨

💖 NAME 💖

dcss_scaler_filter_design — compute filter coefficients using Gaussian filter. no cap, that’s the whole name situation. 💅

🌸 SYNOPSIS 🌸

void dcss_scaler_filter_design (int src_length , int dst_length , bool use_5_taps , bool phase0_identity , int coef[][PSC_NUM_TAPS] , bool nn_interpolation );

🎀 ARGUMENTS 🎀

• src_length — length of input. it’s the input’s little length situation. 💖
• dst_length — length of output. yep, the output length, iconic. ✨
• use_5_taps — 0 for 7 taps per phase, 1 for 5 taps. pick your tap era wisely bestie. 🎀
• phase0_identity — whether to override phase 0 coefficients with identity filter. so it’s a yes/no vibe check for that override. 🦋
• coef — output coefficients. this is where the coefficients come out to play. 🫶
• nn_interpolation — whether to use nearest neighbor instead of gaussian filter. nearest-neighbor girlies vs gaussian girlies, choose your fighter. 😭

🔥 SEE ALSO 🔥

• Kernel file ./drivers/gpu/drm/imx/dcss/dcss-scaler.c
• mult_q(9), div_q(9), exp_approx_q(9), dcss_scaler_gaussian_filter(9) — the whole friend group, go peek at them too. 👑

mwah 💋 this page is sourced from ./drivers/gpu/drm/imx/dcss, dated October 2026, and it’s still serving dcss_scaler_filter_design(9) realness. byeee ✨