modules.d/50drm/module-setup.sh

   1 #!/bin/bash
   2
   3 # called by dracut
   4 check() {
   5     return 255
   6 }
   7
   8 # called by dracut
   9 depends() {
  10     return 0
  11 }
  12
  13 # called by dracut
  14 installkernel() {
  15     local _modname
  16     # Include KMS capable drm drivers
  17
  18     drm_module_filter() {
  19         local _drm_drivers='drm_crtc_init'
  20         local _ret
  21         # subfunctions inherit following FDs
  22         local _merge=8 _side2=9
  23         function nmf1() {
  24             local _fname _fcont
  25             while read _fname || [ -n "$_fname" ]; do
  26                 case "$_fname" in
  27                     *.ko)    _fcont="$(<        $_fname)" ;;
  28                     *.ko.gz) _fcont="$(gzip -dc $_fname)" ;;
  29                     *.ko.xz) _fcont="$(xz -dc   $_fname)" ;;
  30                 esac
  31                 [[   $_fcont =~ $_drm_drivers
  32                 && ! $_fcont =~ iw_handler_get_spy ]] \
  33                 && echo "$_fname"
  34             done
  35         }
  36         function rotor() {
  37             local _f1 _f2
  38             while read _f1 || [ -n "$_f1" ]; do
  39                 echo "$_f1"
  40                 if read _f2; then
  41                     echo "$_f2" 1>&${_side2}
  42                 fi
  43             done | nmf1 1>&${_merge}
  44         }
  45         # Use two parallel streams to filter alternating modules.
  46         set +x
  47         eval "( ( rotor ) ${_side2}>&1 | nmf1 ) ${_merge}>&1"
  48         [[ $debug ]] && set -x
  49         return 0
  50     }
  51
  52     if [[ "$(uname -p)" == arm* ]]; then
  53         # arm specific modules needed by drm
  54         instmods \
  55             "=drivers/gpu/drm/i2c" \
  56             "=drivers/gpu/drm/panel" \
  57             "=drivers/pwm" \
  58             "=drivers/video/backlight" \
  59             "=drivers/video/fbdev/omap2/displays-new" \
  60             ${NULL}
  61     fi
  62
  63     instmods amdkfd hyperv_fb
  64
  65     for _modname in $(find_kernel_modules_by_path drivers/gpu/drm \
  66         | drm_module_filter) ; do
  67         # if the hardware is present, include module even if it is not currently loaded,
  68         # as we could e.g. be in the installer; nokmsboot boot parameter will disable
  69         # loading of the driver if needed
  70         if [[ $hostonly ]] && modinfo -F alias $_modname | sed -e 's,\?,\.,g' -e 's,\*,\.\*,g' \
  71             | grep -qxf - /sys/bus/{pci/devices,soc/devices/soc?}/*/modalias 2>/dev/null; then
  72             hostonly='' instmods $_modname
  73             # if radeon.ko is installed, we want amdkfd also
  74             if strstr "$_modname" radeon.ko; then
  75                 hostonly='' instmods amdkfd
  76             fi
  77             continue
  78         fi
  79         instmods $_modname
  80     done
  81 }