cam: drm: Support /dev/dri cards other than 0

Existing code is hardcoded to card0. Since recent fedora upgrades, we
have noticed on more than one machine that card1 is present as the
lowest numbered device, could theoretically be higher. This technique
tries every file starting with card and continue only when we have
successfully opened one. These devices with card1 as the lowest device
were simply failing when they do not see a /dev/dri/card0 file present.

Reported-by: Ian Mullins <imullins@redhat.com>
Tested-by: Ian Mullins <imullins@redhat.com>
Signed-off-by: Eric Curtin <ecurtin@redhat.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/cam/drm.h b/src/cam/drm.h
index de57e445..655a7509 100644
--- a/src/cam/drm.h
+++ b/src/cam/drm.h
@@ -311,6 +311,7 @@ private:
 	Device &operator=(const Device &) = delete;
 	Device &operator=(const Device &&) = delete;
 
+	int openCard();
 	int getResources();
 
 	void drmEvent();