drm_dp_dsc_s...e_count_mask(9)

📦 version 7.3.1, in nixpkgs unstable

okay so bestie, welcome to the Kernel API Manual page for drm_dp_dsc_s...e_count_mask(9) ✨ yes that's literally the name up top — the header squishes it down with the little ... in the middle, and we're leaving it exactly like that because that's how the page is filed 💅 (the NAME section below spells the whole thing out for you, iykyk).

🌸 NAME 🌸

drm_dp_dsc_sink_slice_count_mask — get the mask of valid DSC sink slice counts 🔥

✨ SYNOPSIS ✨

u32 drm_dp_dsc_sink_slice_count_mask (const u8
dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE] , bool is_edp );

🎀 ARGUMENTS 🎀

  • dsc_dpcd — the sink's DSC DPCD capabilities. this is the little blob of capability data you're handin over 🫶
  • is_edp — true for an eDP sink (so, like, a laptop-panel situation, not a regular external display vibe) 🌈

🦋 DESCRIPTION 🦋

okay so what this actually does: it goes and grabs the mask of supported slice counts straight out of the sink's DSC DPCD register ✨ lowkey it's just a "hey, what slice counts can you do?" lookup, and it hands you back a mask instead of a list. that's the whole thing. no cap, that's it 💅

⭐ RETURN ⭐

mask of slice counts supported by the DSC sink, and here's how to read it:

  • > 0 — bit#0,1,3,5..,23 set if the sink supports 1,2,4,6..,24 slices 👑
  • 0 — if the sink doesn't support any slices 💀
fr fr, watch those bit positions — bit#0,1,3,5..,23 is not a straight 1,2,3,4 walk, it's the real deal exactly as written. don't be out here assuming 🙈

💜 SEE ALSO 💜

the kernel file behind all this: ./drivers/gpu/drm/display/drm_dp_helper.c 🎀

and now, the full friend group — every single one, no skipping, because the manpage said so and we don't gatekeep here 🫶 (and yes, dp helpers(9) shows up twice in the list, that's literally how the page has it, we're not editing the icon's choices 💅):

that's the page, bestie, you ate it 🍓 and for the cute sign-off: this one lives under source ./drivers/gpu/drm/display, dated October 2026, and if you ever need to find it again it's filed right back under drm_dp_dsc_s...e_count_mask(9) where it belongs 🧚💖

📦 where this page comes from