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steamify-cachyos/lib/hdmi-refresh.sh
T
theupriser 23ef5ef7ab feat(ui): HDMI refresh boost in the app 
Set up… opens a screen with the display, its resolution and the rates on
offer. The display's own faster mode is switched to right away; the other
rates can each be tried live (wait for the picture, keep within 15 s or it
switches back) and ticked; Install installs the ticked ones through
apply --hdmi. All rates are loaded when the screen opens, so a try is only a
mode switch. Also fixes switching back to a rate like 59.97 Hz.
2026-09-25 21:21:13 +02:00

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#!/bin/bash
# "HDMI refresh boost" menu item, Steam Machine (Fremont) only: finds the
# highest refresh rate the display runs at the desktop resolution over HDMI,
# tests it live and makes it permanent with an EDID override
# (drm.edid_firmware). Two things keep displays below what they can do:
# - Monitors put their fast modes in an extra EDID block (HDMI Forum EEODB);
# the pinned kernel (7.1.6) only reads the first extension. Newer kernels
# do, and do HDMI 2.1, so it's only offered with the pinned kernel.
# - Their fastest modes need HDMI 2.1 (FRL), which amdgpu doesn't do on
# every kernel; a mode with the display's shortest blanking at a slightly
# lower rate often still fits HDMI 2.0's TMDS limit (600 MHz).
# What a display claims isn't what it accepts: every step is shown and must
# be confirmed, and no answer within 15 s switches back (the screen may be
# black). Sourced by steamify.sh; not meant to be run on its own.
HDMI_FW_DIR=/usr/lib/firmware/edid
HDMI_INITRAMFS_CONF=/etc/mkinitcpio.conf.d/90-steamify-edid.conf
# No answer within this time switches back; longer for scripted tests.
HDMI_CONFIRM_SECONDS="${WIZARD_HDMI_CONFIRM_SECONDS:-15}"
# amdgpu's HDMI 2.0 limit; the display's own limit (from its EDID) may be lower.
HDMI_TMDS_MAX_KHZ=600000
# Rates picked and tested in the app ("<output>=<w>x<h>:<rate>,..."), set by
# the backend's apply --hdmi; empty in the terminal menu, which tests itself.
HDMI_CHOICE=()
hdmi_connectors() {
# Connected HDMI outputs, as "<card>-<connector>" (e.g. card1-HDMI-A-1).
local d
for d in /sys/class/drm/card*-HDMI-A-*; do
[[ "$(cat "$d/status" 2>/dev/null)" == connected ]] && basename "$d"
done
}
hdmi_boot_file() {
# The file holding the kernel command line, per boot loader.
if [[ -f /etc/default/limine ]]; then echo /etc/default/limine
elif [[ -f /etc/sdboot-manage.conf ]] && command -v sdboot-manage >/dev/null; then echo /etc/sdboot-manage.conf
elif [[ -f /etc/default/grub ]]; then echo /etc/default/grub
fi
}
hdmi_cmdline_param() {
# The drm.edid_firmware= value we set, or nothing.
local f; f="$(hdmi_boot_file)"
[[ -n "$f" ]] && grep -oE 'drm\.edid_firmware=[^ "]*steamify-[^ "]*' "$f" 2>/dev/null | head -n 1
}
hdmi_available() {
# Stays available while on, so it can be turned off after the pin is gone.
detect_valve_fremont || return 1
hdmi_status || { pinned_kernel_installed && [[ -n "$(hdmi_connectors)" && -n "$(hdmi_boot_file)" ]]; }
}
hdmi_status() { [[ -n "$(hdmi_cmdline_param)" ]] && compgen -G "$HDMI_FW_DIR/steamify-*.bin" >/dev/null; }
hdmi_edid_tool() {
# hdmi_edid_tool <command> ...: EDID parsing and building (python, as
# it's byte work). Commands:
# blocks <edid> number of blocks the display says it has
# id <edid> vendor/product/serial, to recognise it
# plan <edid> <w> <h> <cur_hz> "<limit_hz> <best> <step>..." for w x h
# build <in> <out> <w> <h> <hz>... full EDID plus a DisplayID block
# with those rates at the shortest blanking
python3 - "$HDMI_TMDS_MAX_KHZ" "$@" <<'PY'
import sys
src_khz = int(sys.argv[1]); cmd = sys.argv[2]; args = sys.argv[3:]
def load(p): return bytearray(open(p, 'rb').read())
def le(b): return int.from_bytes(b, 'little')
def cta_blocks(e):
for i in range(128, len(e), 128):
if e[i] == 0x02: yield i
def data_blocks(e, i):
# CTA data block collection: (tag, extended tag, offset, length)
end, p = e[i + 2], i + 4
while p < i + end and p < i + 127:
tag, n = e[p] >> 5, e[p] & 0x1f
yield tag, (e[p + 1] if tag == 7 and n else None), p, n
p += n + 1
def eeodb(e):
for i in cta_blocks(e):
for tag, ext, p, n in data_blocks(e, i):
if tag == 7 and ext == 0x78: return p + 2
return None
def nblocks(e):
p = eeodb(e)
return 1 + max(e[126], e[p] if p and p < len(e) else 0)
def timings(e):
# (hz, clk_khz, ha, hb, hf, hs, hpos, va, vb, vf, vs, vpos)
out = []
def dtd(b):
clk = le(b[0:2]) * 10
if not clk: return
ha = b[2] | (b[4] >> 4) << 8; hb = b[3] | (b[4] & 15) << 8
va = b[5] | (b[7] >> 4) << 8; vb = b[6] | (b[7] & 15) << 8
hf = b[8] | (b[11] >> 6 & 3) << 8; hs = b[9] | (b[11] >> 4 & 3) << 8
vf = (b[10] >> 4) | (b[11] >> 2 & 3) << 4; vs = (b[10] & 15) | (b[11] & 3) << 4
if b[17] & 0x80: return # interlaced
out.append((clk * 1000 / ((ha + hb) * (va + vb)), clk, ha, hb, hf, hs, b[17] >> 1 & 1,
va, vb, vf, vs, b[17] >> 2 & 1))
for o in range(54, 126, 18): dtd(e[o:o + 18])
for i in cta_blocks(e):
d = e[i + 2]
if d >= 4:
for o in range(i + d, i + 127 - 17, 18): dtd(e[o:o + 18])
for i in range(128, len(e), 128):
if e[i] != 0x70: continue
p, end = i + 5, i + 5 + e[i + 2]
while p + 3 <= end:
tag, n = e[p], e[p + 2]
if tag == 0 and n == 0: break
if tag == 0x03:
for o in range(p + 3, p + 3 + n - 19, 20):
b = e[o:o + 20]
clk = (le(b[0:3]) + 1) * 10
hf, vf = le(b[8:10]), le(b[16:18])
ha, hb, va, vb = le(b[4:6]) + 1, le(b[6:8]) + 1, le(b[12:14]) + 1, le(b[14:16]) + 1
out.append((clk * 1000 / ((ha + hb) * (va + vb)), clk, ha, hb, (hf & 0x7fff) + 1,
le(b[10:12]) + 1, hf >> 15, va, vb, (vf & 0x7fff) + 1, le(b[18:20]) + 1, vf >> 15))
p += 3 + n
return out
def tmds_khz(e):
# The display's own TMDS limit: HDMI Forum VSDB, else the HDMI 1.4 VSDB.
hf = h14 = 0
for i in cta_blocks(e):
for tag, ext, p, n in data_blocks(e, i):
if tag != 3 or n < 3: continue
oui = e[p + 3] << 16 | e[p + 2] << 8 | e[p + 1]
if oui == 0xC45DD8 and n >= 5: hf = e[p + 5] * 5000
if oui == 0x000C03 and n >= 7: h14 = e[p + 7] * 5000
lim = hf or h14 or 165000
return min(lim, src_khz)
def max_vrefresh(e):
# Range limits descriptor, the HDMI Forum / AMD VRR maximum.
best = 0
for o in range(54, 126, 18):
b = e[o:o + 18]
if b[0:3] == b'\0\0\0' and b[3] == 0xfd:
best = max(best, b[6] + (255 if b[4] & 2 else 0))
for i in cta_blocks(e):
for tag, ext, p, n in data_blocks(e, i):
if tag != 3 or n < 3: continue
oui = e[p + 3] << 16 | e[p + 2] << 8 | e[p + 1]
if oui == 0xC45DD8 and n >= 10: best = max(best, (e[p + 9] & 0xc0) << 2 | e[p + 10])
if oui == 0x00001A and n >= 7: best = max(best, e[p + 7])
return best
def shortest(e, w, h):
ts = [t for t in timings(e) if t[2] == w and t[7] == h]
return min(ts, key=lambda t: (t[2] + t[3]) * (t[7] + t[8])) if ts else None
if cmd == 'blocks':
print(nblocks(load(args[0])))
elif cmd == 'id':
print(load(args[0])[8:18].hex())
elif cmd == 'plan':
e = load(args[0]); w, h, cur = int(args[1]), int(args[2]), float(args[3])
lim, t = tmds_khz(e), shortest(e, w, h)
if not t: sys.exit(1)
listed = [x[0] for x in timings(e) if x[2] == w and x[7] == h and x[1] <= lim]
best = max(listed) if listed else cur
top = int(lim * 1000 // ((t[2] + t[3]) * (t[7] + t[8])))
vmax = max_vrefresh(e) or int(max(x[0] for x in timings(e) if x[2] == w and x[7] == h))
top = min(top, vmax)
# Not right at the limit: the top rounded down to ten, and the hundred
# below it as a safe option. Rates the display already lists are left
# out (its own timing is the safer one), and so is anything not faster
# than what already works.
steps = sorted({top // 10 * 10, top // 100 * 100})
steps = [s for s in steps if s > best + 1 and not any(abs(s - x) < 1 for x in listed)]
print(lim // 1000, round(best, 2), *steps)
elif cmd == 'options':
# JSON for the app: the display's name, the HDMI limit and the rates to
# offer at w x h: its own modes the kernel skips ("monitor"), calculated
# tens up to the limit ("calculated", ticked) and the exact limit when
# that's no ten ("limit", not ticked).
import json
e, k = load(args[0]), load(args[1]); w, h, cur = int(args[2]), int(args[3]), float(args[4])
lim, t = tmds_khz(e), shortest(e, w, h)
name = ''
for o in range(54, 126, 18):
if e[o:o + 3] == b'\0\0\0' and e[o + 3] == 0xfc:
name = e[o + 5:o + 18].split(b'\n')[0].decode('ascii', 'replace').strip()
rates = []
if t:
fits = [x for x in timings(e) if x[2] == w and x[7] == h and x[1] <= lim]
known = [x[0] for x in timings(k) if x[2] == w and x[7] == h]
listed = [x[0] for x in fits]
best = max(listed + [cur])
for x in sorted(fits):
if x[0] > cur + 1 and not any(abs(x[0] - y) < 0.5 for y in known):
rates.append({'hz': round(x[0], 2), 'mhz': round(x[1] / 1000, 1), 'kind': 'monitor', 'pick': True})
size = (t[2] + t[3]) * (t[7] + t[8])
vmax = max_vrefresh(e) or int(max(listed + [cur]))
top = min(int(lim * 1000 // size), vmax)
tens = [r for r in range(10, top + 1, 10) if r > best + 1 and not any(abs(r - y) < 1 for y in listed)][-3:]
for r in tens:
rates.append({'hz': r, 'mhz': round(size * r / 1e6, 1), 'kind': 'calculated', 'pick': True})
if top % 10 and top > best + 1:
rates.append({'hz': top, 'mhz': round(size * top / 1e6, 1), 'kind': 'limit', 'pick': False})
print(json.dumps({'name': name, 'limit': lim // 1000, 'rates': rates}))
elif cmd == 'build':
e = load(args[0]); w, h = int(args[2]), int(args[3]); rates = [int(r) for r in args[4:]]
t = shortest(e, w, h)
n = nblocks(e)
e = e[:n * 128]
out = b''
for hz in rates:
_, _, ha, hb, hf, hs, hp, va, vb, vf, vs, vp = t
clk = round((ha + hb) * (va + vb) * hz / 1e4)
x = (clk - 1).to_bytes(3, 'little') + bytes([0x08])
for v, pol in ((ha, 0), (hb, 0), (hf, hp), (hs, 0), (va, 0), (vb, 0), (vf, vp), (vs, 0)):
x += ((v - 1) | pol << 15).to_bytes(2, 'little')
out += x
if out:
blk = bytearray(128)
blk[0:5] = bytes([0x70, 0x12, 121, 0x00, 0x00])
blk[5:8] = bytes([0x03, 0x00, len(out)])
blk[8:8 + len(out)] = out
blk[126] = (-sum(blk[1:126])) % 256
blk[127] = (-sum(blk[:127])) % 256
e += blk
count = len(e) // 128 - 1
e[126] = count
e[127] = (-sum(e[:127])) % 256
p = eeodb(e)
if p:
e[p] = count
i = p - p % 128
e[i + 127] = (-sum(e[i:i + 127])) % 256
open(args[1], 'wb').write(e)
PY
}
hdmi_read_edid() {
# hdmi_read_edid <card-connector> <out>: the display's complete EDID,
# read over DDC block by block (the kernel's copy may miss blocks).
local conn="$1" out="$2" bus n i tmp
bus="$(basename "$(readlink -f "/sys/class/drm/$conn/ddc")")"; bus="${bus#i2c-}"
tmp="$(mktemp)"
cat "/sys/class/drm/$conn/edid" > "$out"
if [[ -n "$bus" ]] && sudo modprobe i2c-dev 2>/dev/null; then
n="$(hdmi_edid_tool blocks "$out")"
: > "$tmp"
for (( i = 0; i < n; i++ )); do
# Segment pointer (0x30) selects each pair of blocks.
sudo i2ctransfer -y "$bus" w1@0x30 $(( i / 2 )) w1@0x50 $(( (i % 2) * 128 )) r128@0x50 2>/dev/null |
xxd -r -p >> "$tmp" 2>/dev/null ||
{ [[ $i -lt 2 ]] && { sudo i2ctransfer -y "$bus" w1@0x50 $(( i * 128 )) r128@0x50 | xxd -r -p >> "$tmp"; }; } || break
done
# Keep the DDC copy only when it's whole and the same display as the
# kernel's (not the whole block: a live override changes it).
if [[ "$(stat -c %s "$tmp")" == $(( n * 128 )) &&
"$(hdmi_edid_tool id "$tmp")" == "$(hdmi_edid_tool id "$out")" ]]; then
cat "$tmp" > "$out"
fi
fi
rm -f "$tmp"
}
hdmi_debugfs() {
# debugfs directory of a connector (one of several paths to the same
# GPU). Only root can list debugfs, so the glob runs under sudo.
local d
d="$(sudo sh -c 'for d in /sys/kernel/debug/dri/*/"$1"; do [ -e "$d/edid_override" ] && { echo "$d"; break; }; done' _ "${1#card*-}")"
[[ -n "$d" ]] && echo "$d"
}
hdmi_override_live() {
# hdmi_override_live <card-connector> <edid|reset>: swap the EDID the
# kernel uses right now, without a restart.
local d; d="$(hdmi_debugfs "$1")" || return 1
# The kernel takes exactly "reset", without a newline.
if [[ "$2" == reset ]]; then printf reset | sudo tee "$d/edid_override" >/dev/null
else sudo tee "$d/edid_override" < "$2" >/dev/null; fi || return 1
echo 1 | sudo tee "$d/trigger_hotplug" >/dev/null
sleep 3
}
hdmi_kscreen() {
# hdmi_kscreen current|mode <output> [<w> <h> <hz>]: KDE's view of the
# output: "w h hz" of the current mode, or set the mode closest to hz.
kscreen-doctor -j 2>/dev/null | python3 -c '
import json, sys
what, name = sys.argv[1], sys.argv[2]
for o in json.load(sys.stdin)["outputs"]:
if o["name"] != name: continue
modes = {m["id"]: m for m in o["modes"]}
if what == "current":
m = modes[o["currentModeId"]]
print(m["size"]["width"], m["size"]["height"], round(m["refreshRate"], 2))
else:
w, h, hz = int(sys.argv[3]), int(sys.argv[4]), float(sys.argv[5])
ms = [m for m in o["modes"] if m["size"]["width"] == w and m["size"]["height"] == h]
if ms: print(min(ms, key=lambda m: abs(m["refreshRate"] - hz))["id"])
' "$@"
}
hdmi_set_mode() {
# hdmi_set_mode <output> <w> <h> <hz>: returns 1 if KDE has no such mode.
local id rate
id="$(hdmi_kscreen mode "$@")" || return 1
[[ -n "$id" ]] || return 1
kscreen-doctor "output.$1.mode.$id" >/dev/null 2>&1 || return 1
sleep 2
rate="$(hdmi_kscreen current "$1" | cut -d' ' -f3)"
# Whole hertz: the rate asked for can be e.g. 59.97.
[[ "${rate%.*}" -ge $(( ${4%.*} - 1 )) ]]
}
hdmi_confirm() {
# No answer (black screen, nobody there) is a no.
local reply
read -rt "$HDMI_CONFIRM_SECONDS" -p "$(echo -e "${c_bold}$1${c_reset} [y/N, ${HDMI_CONFIRM_SECONDS}s] ")" reply || { echo; return 1; }
[[ "$reply" =~ ^[Yy]$ ]]
}
hdmi_boot_param() {
# hdmi_boot_param <value|"">: set or remove our drm.edid_firmware= in
# the boot loader's command line, then rebuild the initramfs and entries.
local f value="$1"
f="$(hdmi_boot_file)" || return 1
[[ -n "$f" ]] || { err "No supported boot loader (Limine, systemd-boot with sdboot-manage, GRUB) found."; return 1; }
backup_file "$f"
sudo sed -i -E 's/drm\.edid_firmware=[^ "]*steamify-[^ "]* ?//' "$f"
if [[ -n "$value" ]]; then
case "$f" in
# | as delimiter: the value holds a path.
/etc/default/limine) sudo sed -i -E "0,\|^KERNEL_CMDLINE\[default\]\+?=\"|s||&$value |" "$f" ;;
/etc/sdboot-manage.conf) sudo sed -i -E "0,\|^LINUX_OPTIONS=\"|s||&$value |" "$f" ;;
/etc/default/grub) sudo sed -i -E "0,\|^GRUB_CMDLINE_LINUX_DEFAULT=\"|s||&$value |" "$f" ;;
esac
grep -qF "$value" "$f" || { err "Couldn't add $value to $f."; return 1; }
fi
info "Rebuilding the initramfs and boot entries..."
case "$f" in
/etc/default/limine) sudo limine-mkinitcpio ;;
/etc/sdboot-manage.conf) sudo /usr/bin/mkinitcpio -P && sudo sdboot-manage gen ;;
/etc/default/grub) sudo /usr/bin/mkinitcpio -P && sudo grub-mkconfig -o /boot/grub/grub.cfg ;;
esac
}
hdmi_tune() {
# hdmi_tune <card-connector> <tmpdir>: find and confirm the highest rate
# at the desktop resolution. Sets HDMI_RESULT to "<w> <h> <hz>..." (the
# confirmed new rates) or leaves it empty.
local conn="$1" tmp="$2" out="${1#card*-}" cur w h hz plan lim best steps_str
local -a steps ok_rates=()
HDMI_RESULT=""
# From the display's own EDID: a live one left by an earlier test would
# make its rates look like what the display already does.
hdmi_override_live "$conn" reset 2>/dev/null
cur="$(hdmi_kscreen current "$out")"
[[ -n "$cur" ]] || { warn "$out: KDE doesn't show this output; skipped."; return 0; }
read -r w h hz <<< "$cur"
info "$out: desktop resolution ${w}x${h} at ${hz} Hz. Reading the display's EDID..."
hdmi_read_edid "$conn" "$tmp/$out.orig" || return 1
if ! plan="$(hdmi_edid_tool plan "$tmp/$out.orig" "$w" "$h" "$hz")"; then
warn "$out: the display lists no timing for ${w}x${h}; nothing to calculate."
return 0
fi
read -r lim best steps_str <<< "$plan"
read -ra steps <<< "${steps_str:-}"
info "$out: HDMI limit ${lim} MHz, fastest mode that fits now: ${best} Hz."
if [[ ${#steps[@]} -eq 0 ]]; then
ok "$out: already at the highest rate that fits HDMI here; nothing to change."
return 0
fi
info "$out: steps to try: ${steps[*]} Hz. After each one you're asked whether the"
info "picture is OK; no answer within ${HDMI_CONFIRM_SECONDS} s (e.g. a black screen) switches back."
ask_yn "Start the test?" y || return 0
hdmi_edid_tool build "$tmp/$out.orig" "$tmp/$out.test" "$w" "$h" "${steps[@]}" &&
hdmi_override_live "$conn" "$tmp/$out.test" ||
{ err "$out: couldn't load the test EDID (debugfs)."; return 1; }
local s
for s in "${steps[@]}"; do
info "$out: switching to ${w}x${h} at $s Hz..."
if hdmi_set_mode "$out" "$w" "$h" "$s" && hdmi_confirm "Is the picture OK at $s Hz?"; then
ok "$out: $s Hz works."
ok_rates+=("$s")
else
warn "$out: $s Hz doesn't work; stopping here."
break
fi
done
if [[ ${#ok_rates[@]} -eq 0 ]]; then
hdmi_override_live "$conn" reset
hdmi_set_mode "$out" "$w" "$h" "$hz" >/dev/null
info "$out: back to ${hz} Hz; nothing changed."
return 0
fi
# Without the steps that failed, so KDE and gamescope never pick them.
hdmi_edid_tool build "$tmp/$out.orig" "$tmp/$out.final" "$w" "$h" "${ok_rates[@]}" &&
hdmi_override_live "$conn" "$tmp/$out.final"
hdmi_set_mode "$out" "$w" "$h" "${ok_rates[-1]}" >/dev/null
HDMI_RESULT="$w $h ${ok_rates[*]}"
}
# --- For the app: options, live tries, and installing what was confirmed ---
# The EDIDs read by hdmi_options, reused by the tries and the install.
HDMI_CACHE="${XDG_RUNTIME_DIR:-/tmp}/steamify-hdmi"
hdmi_options() {
# JSON array: per connected HDMI output its name, mode and rate options.
local conn out cur w h hz opts sep=""
mkdir -p "$HDMI_CACHE"
printf '['
for conn in $(hdmi_connectors); do
out="${conn#card*-}"
# A live EDID left by an earlier try would look like the display's own.
hdmi_status || hdmi_override_live "$conn" reset 2>/dev/null
cur="$(hdmi_kscreen current "$out")"
[[ -n "$cur" ]] || continue
read -r w h hz <<< "$cur"
hdmi_read_edid "$conn" "$HDMI_CACHE/$out.orig" || continue
opts="$(hdmi_edid_tool options "$HDMI_CACHE/$out.orig" "/sys/class/drm/$conn/edid" "$w" "$h" "$hz")" || continue
# Every rate on offer loaded now, while the list is on screen: a try
# is then only a mode switch (the current mode stays in the EDID).
hdmi_status || hdmi_preload "$conn" "$w" "$h" "$opts"
printf '%s{"connector":"%s","output":"%s","width":%s,"height":%s,"hz":%s,"info":%s}' "$sep" "$conn" "$out" "$w" "$h" "$hz" "$opts"
sep=","
done
printf ']'
}
hdmi_preload() {
# hdmi_preload <card-connector> <w> <h> <options json>: load the EDID
# with the calculated rates, as hdmi_try would on the first try.
local conn="$1" out="${1#card*-}"
local -a rates
read -ra rates <<< "$(python3 -c 'import json, sys
print(" ".join(str(r["hz"]) for r in json.loads(sys.argv[1])["rates"] if r["kind"] != "monitor"))' "$4")"
hdmi_edid_tool build "$HDMI_CACHE/$out.orig" "$HDMI_CACHE/$out.test" "$2" "$3" "${rates[@]}" &&
hdmi_override_live "$conn" "$HDMI_CACHE/$out.test" &&
cp "$HDMI_CACHE/$out.test" "$HDMI_CACHE/$out.loaded"
}
hdmi_try() {
# hdmi_try <card-connector> <w> <h> <hz> [<rate>...]: switch to hz, with
# an EDID holding the given calculated rates (loaded once per set).
local conn="$1" w="$2" h="$3" hz="$4" out="${1#card*-}"
shift 4
[[ -f "$HDMI_CACHE/$out.orig" ]] || hdmi_read_edid "$conn" "$HDMI_CACHE/$out.orig"
hdmi_edid_tool build "$HDMI_CACHE/$out.orig" "$HDMI_CACHE/$out.test" "$w" "$h" "$@" || return 1
if ! cmp -s "$HDMI_CACHE/$out.test" "$HDMI_CACHE/$out.loaded" 2>/dev/null; then
hdmi_override_live "$conn" "$HDMI_CACHE/$out.test" || return 1
cp "$HDMI_CACHE/$out.test" "$HDMI_CACHE/$out.loaded"
fi
hdmi_set_mode "$out" "$w" "$h" "$hz"
}
hdmi_reset() {
# hdmi_reset <card-connector> <w> <h> <hz>: the display's own EDID again.
hdmi_override_live "$1" reset
rm -f "$HDMI_CACHE/${1#card*-}.loaded"
hdmi_set_mode "${1#card*-}" "$2" "$3" "$4" >/dev/null
}
hdmi_choose() {
# For HDMI_CHOICE ("<output>=<w>x<h>:<rate>,..." from the app, rates it
# confirmed): builds the final EDIDs in <tmpdir> like hdmi_tune does.
local tmp="$1" item out mode rates w h
local -a r
for item in "${HDMI_CHOICE[@]}"; do
out="${item%%=*}"; mode="${item#*=}"; rates="${mode#*:}"; mode="${mode%%:*}"
w="${mode%x*}"; h="${mode#*x}"
IFS=',' read -ra r <<< "$rates"
HDMI_CHOSEN_CONN="$(basename /sys/class/drm/card*-"$out")"
if [[ -f "$HDMI_CACHE/$out.orig" ]]; then cp "$HDMI_CACHE/$out.orig" "$tmp/$out.orig"
else hdmi_read_edid "$HDMI_CHOSEN_CONN" "$tmp/$out.orig" || return 1; fi
hdmi_edid_tool build "$tmp/$out.orig" "$tmp/$out.final" "$w" "$h" "${r[@]}" &&
hdmi_override_live "$HDMI_CHOSEN_CONN" "$tmp/$out.final" || return 1
[[ ${#r[@]} -gt 0 ]] && hdmi_set_mode "$out" "$w" "$h" "${r[-1]}" >/dev/null
HDMI_RESULTS+=("$out|$w $h ${r[*]}")
done
}
hdmi_enable() {
local -a HDMI_RESULTS=()
if [[ "${BACKEND:-false}" == true && ${#HDMI_CHOICE[@]} -eq 0 ]]; then
err "HDMI refresh boost needs you at the screen: pick and test the rates in the app first."
return 1
fi
if [[ "${XDG_CURRENT_DESKTOP:-}" != *KDE* ]] || ! command -v kscreen-doctor >/dev/null; then
err "Run this from the Plasma desktop: the test switches the display mode through KDE."
return 1
fi
if hdmi_status; then
local conn stale=false
for conn in $(hdmi_connectors); do
[[ -f "$HDMI_FW_DIR/steamify-${conn#card*-}.bin" ]] || continue
[[ "$(state_get hdmi "${conn#card*-}")" == "$(hdmi_edid_tool id "/sys/class/drm/$conn/edid")" ]] || stale=true
done
if [[ "$stale" == false ]]; then
ok "Already set up for the connected display(s). Untick and tick it again to re-test."
return 0
fi
warn "Set up for another display; setting up the one connected now."
hdmi_disable || return 1
fi
sudo pacman -S --needed --noconfirm i2c-tools python >/dev/null 2>&1 || { err "Installing i2c-tools failed."; return 1; }
local tmp conn out param="" files=() rc=0 res
tmp="$(mktemp -d)"
if [[ ${#HDMI_CHOICE[@]} -gt 0 ]]; then
# Picked and tested in the app.
hdmi_choose "$tmp" || rc=1
else
for conn in $(hdmi_connectors); do
hdmi_tune "$conn" "$tmp" || { rc=1; continue; }
[[ -n "$HDMI_RESULT" ]] && HDMI_RESULTS+=("${conn#card*-}|$HDMI_RESULT")
done
fi
for res in "${HDMI_RESULTS[@]}"; do
out="${res%%|*}"
sudo install -Dm644 "$tmp/$out.final" "$HDMI_FW_DIR/steamify-$out.bin" || { rc=1; continue; }
state_set hdmi "$out" "$(hdmi_edid_tool id "$tmp/$out.orig")"
state_set hdmi "$out-mode" "${res#*|}"
param+="${param:+,}$out:edid/steamify-$out.bin"
files+=("$HDMI_FW_DIR/steamify-$out.bin")
done
rm -rf "$tmp" "$HDMI_CACHE"
[[ -n "$param" ]] || return $rc
# amdgpu loads from the initramfs (the kms hook), before the root
# filesystem: the EDID file has to be in there too.
sudo mkdir -p "$(dirname "$HDMI_INITRAMFS_CONF")"
printf '# Written by steamify: EDID override for HDMI refresh boost.\nFILES+=(%s)\n' "${files[*]}" |
sudo tee "$HDMI_INITRAMFS_CONF" >/dev/null
if ! hdmi_boot_param "drm.edid_firmware=$param"; then
# Nothing half-done left behind; the live EDID lasts until a restart.
sudo rm -f "$HDMI_INITRAMFS_CONF" "${files[@]}"
for conn in $(hdmi_connectors); do hdmi_override_live "$conn" reset 2>/dev/null; done
state_clear hdmi
err "Making it permanent failed; the display is back on its own EDID."
return 1
fi
ok "HDMI refresh boost is set up; it's active now and after every restart."
return $rc
}
hdmi_disable() {
local f conn
# Drop-in and files first: the rebuild below leaves them out.
sudo rm -f "$HDMI_INITRAMFS_CONF"
for f in "$HDMI_FW_DIR"/steamify-*.bin; do [[ -e "$f" ]] && sudo rm -f "$f"; done
hdmi_boot_param "" || return 1
for conn in $(hdmi_connectors); do hdmi_override_live "$conn" reset 2>/dev/null; done
state_clear hdmi
ok "HDMI refresh boost removed; the display uses its own EDID again."
}
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