xf86drm: Add USB support

Allow DRM/KMS devices hosted on USB to be detected by the drmDevice
infrastructure.

v4:
- continue on error to process USB devices

v3:
- guard Linux-specific sysfs parsing code with #ifdef __linux__

v2:
- make sysfs_uevent_get() more flexible using a format string

Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/xf86drm.h b/xf86drm.h
index b340fc46..65d53219 100644
--- a/xf86drm.h
+++ b/xf86drm.h
@@ -767,6 +767,7 @@ extern char *drmGetPrimaryDeviceNameFromFd(int fd);
 extern char *drmGetRenderDeviceNameFromFd(int fd);
 
 #define DRM_BUS_PCI   0
+#define DRM_BUS_USB   1
 
 typedef struct _drmPciBusInfo {
     uint16_t domain;
@@ -783,15 +784,27 @@ typedef struct _drmPciDeviceInfo {
     uint8_t revision_id;
 } drmPciDeviceInfo, *drmPciDeviceInfoPtr;
 
+typedef struct _drmUsbBusInfo {
+    uint8_t bus;
+    uint8_t dev;
+} drmUsbBusInfo, *drmUsbBusInfoPtr;
+
+typedef struct _drmUsbDeviceInfo {
+    uint16_t vendor;
+    uint16_t product;
+} drmUsbDeviceInfo, *drmUsbDeviceInfoPtr;
+
 typedef struct _drmDevice {
     char **nodes; /* DRM_NODE_MAX sized array */
     int available_nodes; /* DRM_NODE_* bitmask */
     int bustype;
     union {
         drmPciBusInfoPtr pci;
+        drmUsbBusInfoPtr usb;
     } businfo;
     union {
         drmPciDeviceInfoPtr pci;
+        drmUsbDeviceInfoPtr usb;
     } deviceinfo;
 } drmDevice, *drmDevicePtr;