tree f28ce8ca385490b2d3de9874b660aa05515be14c
parent a3fdd0039e399c25a4d6687b2c1dbabc1549a772
author Simon Glass <sjg@chromium.org> 1475721736 -0600
committer Bin Meng <bmeng.cn@gmail.com> 1476158133 +0800

dm: stdio: Allow lazy probing of video devices

At present all video devices are probed on start-up. It would be better to
probe a device only when it is needed. This can happen if it is referenced
in the stdout environment variable, for example.

Add support for this by searching for a suitable device when needed, probing
it, and finding the stdio device it creates.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>