83 lines
2.7 KiB
Bash
83 lines
2.7 KiB
Bash
#!/usr/bin/env bash
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# Description:
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# Select which GPU to use for rendering for Hyprland and Niri.
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#
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# envs exported:
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# HYPR_AQ_DRM_DEVICES - Colon-separated list of DRM device paths for Hyprland's aq_drm
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# BRIGHTNESSCTL_DEVICE - Device identifier for brightnessctl
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# Constants
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niri_config_file="$HOME/.config/niri/config/misc.kdl"
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prefer_order=(amd nvidia intel) # AMD -> Nvidia -> Intel
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# Get vendor and path of each GPU
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default_dri_path="$(find /dev/dri/card* 2>/dev/null | head -n 1)"
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[[ -z "$default_dri_path" ]] && default_dri_path="/dev/dri/card0"
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intel_path=""
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nvidia_path=""
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amd_path=""
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for link in /dev/dri/by-path/*-card; do
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[[ -e "$link" ]] || continue
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card="$(readlink -f "$link")"
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vfile="/sys/class/drm/$(basename "$card")/device/vendor"
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[[ -r "$vfile" ]] || continue
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vendor="$(cat "$vfile")"
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case "$vendor" in
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0x10de) nvidia_path="$card" ;;
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0x8086) intel_path="$card" ;;
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0x1002) amd_path="$card" ;;
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esac
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done
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# Specify device for brightnessctl
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# Only tested on my laptop with Intel iGPU & Nvidia dGPU
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BRIGHTNESSCTL_DEVICE="auto"
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if [[ -n "$intel_path" ]]; then
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BRIGHTNESSCTL_DEVICE="intel_backlight"
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elif [[ -n "$nvidia_path" ]]; then
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BRIGHTNESSCTL_DEVICE="nvidia_0"
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fi
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export BRIGHTNESSCTL_DEVICE
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# AQ_DRM_DEVICES allows multiple entries separated by colon
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devices=""
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for who in "${prefer_order[@]}"; do
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case "$who" in
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nvidia) [[ -n "$nvidia_path" ]] && devices="${devices:+$devices:}$nvidia_path" ;;
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intel) [[ -n "$intel_path" ]] && devices="${devices:+$devices:}$intel_path" ;;
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amd) [[ -n "$amd_path" ]] && devices="${devices:+$devices:}$amd_path" ;;
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esac
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done
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HYPR_AQ_DRM_DEVICES="${devices:-$default_dri_path}"
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export HYPR_AQ_DRM_DEVICES
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# But niri only supports choosing one preferred render device
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primary_device="$default_dri_path"
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for who in "${prefer_order[@]}"; do
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case "$who" in
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nvidia) [[ -n "$nvidia_path" ]] && { primary_device="$nvidia_path"; break; } ;;
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intel) [[ -n "$intel_path" ]] && { primary_device="$intel_path"; break; } ;;
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amd) [[ -n "$amd_path" ]] && { primary_device="$amd_path"; break; } ;;
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esac
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done
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# Update niri config
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function update_niri_config() {
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local config_file="$1"
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local device_path="$2"
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[[ -f "$config_file" ]] || return
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if grep -qE '^\s*render-drm-device\s+"[^"]+"' "$config_file"; then
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local current
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current="$(grep -E '^\s*render-drm-device\s+"[^"]+"' "$config_file" | sed -E 's/^\s*render-drm-device\s+"([^"]+)".*/\1/')"
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[[ "$current" == "$device_path" ]] && return
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sed -i -E "s|^(\s*render-drm-device\s+)\"[^\"]+\"|\1\"$device_path\"|" "$config_file"
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else
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printf '\ndebug {\nrender-drm-device "%s"\n}\n' "$device_path" >> "$config_file"
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fi
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}
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update_niri_config "$niri_config_file" "$primary_device" |