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libs: drm: find render node in hybrid system

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Originally the drm backend only tried to open the first render node
found. But in hybrid system this first render node might not support
VA-API (propietary Nvidia driver, for example).

This patch tries all the available nodes until a finding one with a
VA-API supported driver.

https://bugzilla.gnome.org/show_bug.cgi?id=774811

Original-patch-by: Stirling Westrup <swestrup@gmail.com> and
                   Reza Razavi <reza@userful.com>
This commit is contained in:
Víctor Manuel Jáquez Leal 2016-12-06 17:33:42 +01:00
parent ad8da84062
commit 7aeefb0990
1 changed files with 20 additions and 2 deletions
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18
gst-libs/gst/vaapi/gstvaapidisplay_drm.c
View file

@ -58,6 +58,22 @@ typedef enum
static DRMDeviceType g_drm_device_type;
static GMutex g_drm_device_type_lock;
static gboolean
supports_vaapi (int fd)
{
gboolean ret;
VADisplay va_dpy;
int major, minor;
va_dpy = vaGetDisplayDRM (fd);
if (!va_dpy)
return FALSE;
ret = (vaInitialize (va_dpy, &major, &minor) == VA_STATUS_SUCCESS);
vaTerminate (va_dpy);
return ret;
}
/* Get default device path. Actually, the first match in the DRM subsystem */
static const gchar *
get_default_device_path (GstVaapiDisplay * display)
@ -109,9 +125,11 @@ get_default_device_path (GstVaapiDisplay * display)
continue;
}
if (supports_vaapi (fd))
priv->device_path_default = g_strdup (devpath);
close (fd);
udev_device_unref (device);
if (priv->device_path_default)
break;
}