Add a description, TODO-list and improve initramfs-hook

Manual.org

@@ -2030,6 +2030,15 @@ preferred_refreshrates:
 
 #+END_SRC
 **** intel.yml
+KMS drivers (like for intel (i915) and amd (radeon)) require additional configuration beneath a customized ~xorg.conf~ - for a "static" output configuration (which works if the TV or AV receiver is not turned on) we need to force loading the display(s) EDID early during the boot process.
+
+This task therefore performs the following actions after the xrandr detection has been executed:
+ - create an initramfs-hook to copy the EDID(s) into the initramfs
+ - get the connector names and match them to the ones determined by xrandr
+ - add kernel boot arguments to set EDID and mode (refreshrate and resolution) for all outputs
+ - recreate and update initramfs and grub config
+
+Please note that rescanning the connected displays works only after removing the forced loading of EDID(s) during boot (call ~clean-edids~) and a reboot.
 #+BEGIN_SRC yaml :tangle roles/yavdr-xorg/tasks/intel.yml :mkdirp yes :padline no
 - name: "create initramfs hook to copy EDID files"
   copy:
@@ -2038,14 +2047,28 @@ preferred_refreshrates:
     mode: 0755
     force: yes
 
+- name: "create /lib/firmware/edid"
+  file:
+    state: directory
+    dest: /lib/firmware/edid
 # TODO:
-# EDID-Dateien nach /lib/firmware/edid/ schreiben
-# GRUB_CMDLINE_LINUX anpassen
-# initramfs updaten
-# grub updaten
+# - write EDID files to /lib/firmware/edid/
+# - complete template for grub.d
+name: "add kernel boot parameters for static display configuration"
+template:
+  src: templates/grub.d/intel.j2
+  dest: /etc/grub.d/99_intel
+  mode: 0755
   notify: ['Update Initramfs', 'Update GRUB']
+
 #+END_SRC
 *** templates
+**** grub
+#+BEGIN_SRC conf :tangle roles/yavdr-xorg/templates/grub.d/intel.j2 :mkdirp yes :padline no
+{% set output_flag = 'D' if ("HDMI" in xorg.primary.connector or "DVI" in xorg.primary.connector or "DP" in xorg.primary.connector) else 'e' %} 
+GRUB_CMDLINE_LINUX+=" video={{ xorg.primary.drm_connector }}:{{ xorg.primary.mode|replace('_', '@') }}{{ output_flag }} drm.edid_firmware={{ xorg.primary.drm_connector }}:edid/edid.bin"
+# TODO: configure additional monitors (second monitor on, all others off)
+#+END_SRC
 **** xorg
 ***** x-verbose@.service
 #+BEGIN_SRC conf :tangle "roles/yavdr-xorg/templates/systemd/system/x-verbose@.service.j2" :padline no
@@ -2426,17 +2449,19 @@ EnvironmentFile=-/var/lib/vdr/.session-env
 *** files
 **** initramfs EDID hook
 #+BEGIN_SRC shell :tangle roles/yavdr-xorg/files/cp-edid-data.sh
-#!/bin/sh
-case $1 in
-prereqs)
-   echo "udev"
-   exit 0
-   ;;
-esac
+#!/bin/bash
+# Created by yavdr-ansible.
+# This hook copies EDID files with the naming scheme "edid.${OUTPUT}.bin" to the initramfs.
+
+[ "$1" = "prereqs" ] && { echo "udev"; exit 0; }
+
+# load hook helper functions
 . /usr/share/initramfs-tools/hook-functions
 
+rm /lib/firmware/edid/edid.*.bin
+find "/etc/X11/" -name "edid.*.bin" -type f -exec cp -t "/lib/firmware/edid/" {} +
 mkdir -p "${DESTDIR}/lib/firmware/edid"
-find "/lib/firmware/edid/" -name "edid*.bin" -type f -exec cp {} "${DESTDIR}/lib/firmware/edid/" +
+find "/etc/X11/" -name "edid.*.bin" -type f -exec cp -t "${DESTDIR}/lib/firmware/edid/" {} +
 manual_add_modules i915 radeon
 exit 0
 #+END_SRC