ecore-drm2: Add support for specifying a particular drm card

Summary:
There are cases where the drm card that we wish to run on is not
always the first card (ie: card1, card2, etc). In our previous code,
we would always start searching at card0 and if found we would always
use that card. This patch allows a card to be specified in the
environment that can be searched for and used. For example, if we
specify ECORE_DRM2_CARD=card1 than that card will be searched and used
if found. This also allows wildcard searches such as
ECORE_DRM2_CARD=card[1-9]* which can be used to skip the first card
(card0).

Reviewers: ManMower

Reviewed By: ManMower

Subscribers: cedric, #reviewers, #committers

Tags: #efl

Differential Revision: https://phab.enlightenment.org/D7530

1 files changed, 7 insertions, 2 deletions

diff --git a/src/lib/ecore_drm2/ecore_drm2_device.c b/src/lib/ecore_drm2/ecore_drm2_device.c
index f5059f5e68..9108db6ff8 100644
--- a/src/lib/ecore_drm2/ecore_drm2_device.c
+++ b/src/lib/ecore_drm2/ecore_drm2_device.c
@@ -95,14 +95,19 @@ static const char *
 _drm2_device_find(Elput_Manager *em, const char *seat)
 {
    Eina_List *devs, *l;
-   const char *dev, *ret = NULL, *chosen_dev = NULL;
+   const char *dev, *ret = NULL, *chosen_dev = NULL, *d = NULL;
    Eina_Bool found = EINA_FALSE;
    Eina_Bool modeset;
    int fd;
 
    EINA_SAFETY_ON_NULL_RETURN_VAL(seat, NULL);
 
-   devs = eeze_udev_find_by_subsystem_sysname("drm", "card[0-9]*");
+   d = getenv("ECORE_DRM2_CARD");
+   if (d)
+     devs = eeze_udev_find_by_subsystem_sysname("drm", d);
+   else
+     devs = eeze_udev_find_by_subsystem_sysname("drm", "card[0-9]*");
+
    if (!devs) return NULL;
 
    EINA_LIST_FOREACH(devs, l, dev)