From 36971ed37bb638e9228c1fb99d6f0e8dceee7855 Mon Sep 17 00:00:00 2001
From: Marc-Andre Lureau <marcandre.lureau@gmail.com>
Date: Tue, 14 Feb 2017 13:18:27 +0400
Subject: [PATCH] rules: add persistent by-path drm rules (#5337)
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Create persistent symlinks for DRM devices, ex:
/dev/dri/by-path/pci-0000:00:02.0-card -> /dev/dri/card1
/dev/dri/by-path/pci-0000:00:02.0-render -> /dev/dri/renderD129
etc...

This allows to configure DRM device usage with stable paths.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
---
 rules/60-drm.rules | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/rules/60-drm.rules b/rules/60-drm.rules
index 1ed3e445f2..f7f3435d50 100644
--- a/rules/60-drm.rules
+++ b/rules/60-drm.rules
@@ -1,3 +1,8 @@
 # do not edit this file, it will be overwritten on update
 
 ACTION!="remove", SUBSYSTEM=="drm", SUBSYSTEMS=="pci|usb|platform", IMPORT{builtin}="path_id"
+
+# by-path
+ENV{ID_PATH}=="?*", KERNEL=="card*", SYMLINK+="dri/by-path/$env{ID_PATH}-card"
+ENV{ID_PATH}=="?*", KERNEL=="controlD*", SYMLINK+="dri/by-path/$env{ID_PATH}-control"
+ENV{ID_PATH}=="?*", KERNEL=="renderD*", SYMLINK+="dri/by-path/$env{ID_PATH}-render"