optc1_set_vtg_params(9)

okay so bestie, welcome to optc1_set_vtg_params(9) from the Kernel API Manual 💖 this is the page where we set Vertical Timing Generator (VTG) parameters, and yes it's giving very “graphics pipe main character energy” ✨

🌸 NAME 🌸

optc1_set_vtg_params — Set Vertical Timing Generator (VTG) parameters 💅

✨ SYNOPSIS ✨

void optc1_set_vtg_params (struct timing_generator *optc , const struct
dc_crtc_timing *dc_crtc_timing , bool program_fp2 );

No cap, that's the whole signature 🫶

🎀 ARGUMENTS 🎀

• optc — the timing_generator struct used to extract the optc parameters. basically the little handle we pull the optc details from 💖
• dc_crtc_timing — the timing parameters configured. yes bestie, the timing config goes here ⭐
• program_fp2 — a Boolean value indicating if FP2 will be programmed or not. the “are we programming FP2 or nah” situation 🙈

🦋 DESCRIPTION 🦋

Okay so the OTG is responsible for generating the global sync signals, including vertical timing information for each HUBP in the dcfclk domain 🌈 Each VTG is associated with one OTG that provides HUBP with vertical timing information — i.e., there is a 1:1 correspondence between OTG and VTG 👑

This function is responsible for setting the OTG parameters to the VTG during the pipe programming 💅 That's it, that's the vibe: pipe programming time, OTG params get set on the VTG ✨

🔥 SEE ALSO 🔥

• Kernel file ./drivers/gpu/drm/amd/display/dc/optc/dcn10/dcn10_optc.c
• apply_front_porch_workaround(9)
• optc1_program_timing(9)
• optc1_set_timing_double_buffer(9)
• optc1_unblank_crtc(9)
• optc1_blank_crtc(9)
• optc1_enable_crtc(9)
• optc1_set_drr(9)
• optc1_get_crc(9)

mwah 💋 that's the whole page, bestie. this iconic little manual came from ./drivers/gpu/drm/amd/display/... and it's dated October 2026 — source/version footer vibes, optc1_set_vtg_params(9) signed off with sparkle 💖✨