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drm: rcar-du: Disable fbdev emulation when no connector is present

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fbdev emulation requires at least one connector, and will fail to
initialize if no connector has been successfully instantiated. Disable
it in that case and print an informational message instead of failing
probe with a confusing fbdev emulation error message.

It could be argued that probe should fail when no connector is present,
but the DU could still be useful in that case with the to-be-implemented
memory write-back support.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
This commit is contained in:
Laurent Pinchart 2015-02-24 03:51:26 +02:00
parent 0cd90a5428
commit 931b733621
1 changed files with 10 additions and 5 deletions
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15
drivers/gpu/drm/rcar-du/rcar_du_kms.c
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@ -448,12 +448,17 @@ int rcar_du_modeset_init(struct rcar_du_device *rcdu)
drm_kms_helper_poll_init(dev);
fbdev = drm_fbdev_cma_init(dev, 32, dev->mode_config.num_crtc,
dev->mode_config.num_connector);
if (IS_ERR(fbdev))
return PTR_ERR(fbdev);
if (dev->mode_config.num_connector) {
fbdev = drm_fbdev_cma_init(dev, 32, dev->mode_config.num_crtc,
dev->mode_config.num_connector);
if (IS_ERR(fbdev))
return PTR_ERR(fbdev);
rcdu->fbdev = fbdev;
rcdu->fbdev = fbdev;
} else {
dev_info(rcdu->dev,
"no connector found, disabling fbdev emulation\n");
}
return 0;
}