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OMAPFB: defer probe if no displays

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omapfb requires the panel drivers to have been probed when omapfb is
initialized. omapfb does not support insertion of new panels after its
probe. This causes a problem in case omapdss or the panel probes have
been deferred due to EPROBE_DEFER error, as omapfb won't find any
displays.

As a quick fix, this patch changes the omapfb probe so that if omapfb
does not find any displays, it'll return EPROBE_DEFER. This is not
perfect, as with a board with no displays, omapfb will get deferred
forever. Also, if the board has multiple displays, but only some of them
have been probed, omapfb will start and leave the unprobed displays out.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
This commit is contained in:
Tomi Valkeinen 2013-04-26 13:40:36 +03:00
parent af56fe3ca6
commit dfbc32316c
1 changed files with 1 additions and 1 deletions
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2
drivers/video/omap2/omapfb/omapfb-main.c
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@ -2484,7 +2484,7 @@ static int omapfb_probe(struct platform_device *pdev)
if (fbdev->num_displays == 0) {
dev_err(&pdev->dev, "no displays\n");
r = -EINVAL;
r = -EPROBE_DEFER;
goto cleanup;
}