[PATCH 0/3] Rework kernel modules detection on ARM

[PATCH 0/3] Rework kernel modules detection on ARM

[Nicolas Chauvet]

 Handle backlight power and related drm dependencies on ARM
  (Tested tegra on Toshiba AC100/Trimslice)


# Fedora 21 armhfp
#  before: "vanilla" dracut-038-14.git20140724.fc21.armv7hl
#  after: dracut + patches

 time dracut -N initramfs-N-before $(uname -r)
real	5m43.169s
user	1m58.385s
sys	4m19.735s

# time dracut -H initramfs-H-before $(uname -r)
real	3m21.537s
user	0m50.595s
sys	2m58.565s

#  time dracut -N initramfs-N-after.img $(uname -r)
real	5m52.874s
user	2m8.385s
sys	4m35.090s

[#  time dracut -H initramfs-H-after.img $(uname -r)
real	3m15.968s
user	0m53.250s
sys	2m58.165s

ls -al
 ls -al initramfs-*
-rw-------. 1 root root 12195212  4 ao没t  18:36 initramfs-H-before.img
-rw-------. 1 root root 12057377  4 ao没t  19:47 initramfs-H-after.img
-rw-------. 1 root root 29522799  4 ao没t  18:18 initramfs-N-before.img
-rw-------. 1 root root 30359836  4 ao没t  19:40 initramfs-N-after.img


lsinitrd initramfs-H-after.img |grep simple-panel shows the module
along with all depencies that will allow to enable the backlight
on the device. (Toshiba AC100)


    v4 - Drop tegra_drm case
       - Categorize ARM needed modules in 90kernel-modules
         and removed drm ones
       - Add rtc, regulators, i2c ARM modules in 90kernel-modules
         drop hostonly='' before instmods
       - Introduce and Categorize ARM needed modules in 50drm
    
    v3 - Drop module-setup.sh hook (better patch by pbrobinson)
       - Drop rtc hook
    
    v2 - Merged patch for kernel-modules for ahci_imx
       - Use "=drivers/ata" to select all ATA drivers
       - Install rtc drivers on ARM - initially reported as rhbz#1074002
        (WIP) need to install hwclock and sync time beforce network time sync
       - Use case in for drm on ARM when modalias is handled by
        a different module than the KMS one
       - Add backlight and pwm to the bundle for drm
       - Fix unbalanced parenthesis


Nicolas Chauvet (3):
  [ARM] Test soc path for modalias needed by drm
  [ARM] Categorize needed modules on ARM
  [ARM] Introduce ARM specific modules needed by drm

 modules.d/50drm/module-setup.sh            | 12 +++++++++++-
 modules.d/90kernel-modules/module-setup.sh |  7 ++++---
 2 files changed, 15 insertions(+), 4 deletions(-)

-- 
1.8.3.1

[PATCH 1/3] [ARM] Test soc path for modalias needed by drm

[Nicolas Chauvet]

On ARM, both pci and soc path can be tested for drm.

With this patchset, that was missing in recent kernel,
the tegra_drm case is not needed anymore:
http://patchwork.ozlabs.org/patch/361765/
http://www.spinics.net/lists/linux-tegra/msg17948.html
---
 modules.d/50drm/module-setup.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/modules.d/50drm/module-setup.sh b/modules.d/50drm/module-setup.sh
index e25fc9f..9a48aaf 100755
--- a/modules.d/50drm/module-setup.sh
+++ b/modules.d/50drm/module-setup.sh
@@ -57,7 +57,7 @@ installkernel() {
         # as we could e.g. be in the installer; nokmsboot boot parameter will disable
         # loading of the driver if needed
         if [[ $hostonly ]] && modinfo -F alias $_modname | sed -e 's,\?,\.,g' -e 's,\*,\.\*,g' \
-            | grep -qxf - /sys/bus/pci/devices/*/modalias 2>/dev/null; then
+            | grep -qxf - /sys/bus/{pci/devices,soc/devices/soc?}/*/modalias 2>/dev/null; then
             hostonly='' instmods $_modname
             continue
         fi
-- 
1.8.3.1

[PATCH 2/3] [ARM] Categorize needed modules on ARM

[Nicolas Chauvet]

---
 modules.d/90kernel-modules/module-setup.sh | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/modules.d/90kernel-modules/module-setup.sh b/modules.d/90kernel-modules/module-setup.sh
index 1ce133f..f3e4f65 100755
--- a/modules.d/90kernel-modules/module-setup.sh
+++ b/modules.d/90kernel-modules/module-setup.sh
@@ -51,10 +51,13 @@ installkernel() {
 
         if [[ "$(uname -p)" == arm* ]]; then
             # arm specific modules
-            hostonly='' instmods \
-	        connector-hdmi connector-dvi encoder-tfp410 \
-	        encoder-tpd12s015 i2c-tegra gpio-regulator \
-		as3722-regulator orion-ehci ehci-tegra 
+            instmods \
+                "=drivers/i2c/busses" \
+                "=drivers/regulator" \
+                "=drivers/rtc" \
+                "=drivers/usb/host" \
+                "=drivers/usb/phy" \
+                ${NULL}
         fi
 
         # install virtual machine support
-- 
1.8.3.1

[PATCH 3/3] [ARM] Introduce ARM specific modules needed by drm

[Nicolas Chauvet]

---
 modules.d/50drm/module-setup.sh | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/modules.d/50drm/module-setup.sh b/modules.d/50drm/module-setup.sh
index 9a48aaf..a42bcba 100755
--- a/modules.d/50drm/module-setup.sh
+++ b/modules.d/50drm/module-setup.sh
@@ -51,6 +51,17 @@ installkernel() {
         return 0
     }
 
+    if [[ "$(uname -p)" == arm* ]]; then
+        # arm specific modules needed by drm
+        instmods \
+            "=drivers/gpu/drm/i2c" \
+            "=drivers/gpu/drm/panel" \
+            "=drivers/pwm" \
+            "=drivers/video/backlight" \
+            "=drivers/video/fbdev/omap2/displays-new" \
+            ${NULL}
+    fi
+
     for _modname in $(find_kernel_modules_by_path drivers/gpu/drm \
         | drm_module_filter) ; do
         # if the hardware is present, include module even if it is not currently loaded,
-- 
1.8.3.1

Re: [PATCH 0/3] Rework kernel modules detection on ARM

[Harald Hoyer]

On 04.08.2014 22:04, Nicolas Chauvet wrote:
>  Handle backlight power and related drm dependencies on ARM
>   (Tested tegra on Toshiba AC100/Trimslice)
> 

Thanks! Pushed.