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OMAPDSS: Fix crash with DT boot

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When booting with DT, there's a crash when omapfb is probed. This is
caused by the fact that omapdss+DT is not yet supported, and thus
omapdss is not probed at all. On the other hand, omapfb is always
probed. When omapfb tries to use omapdss, there's a NULL pointer
dereference crash. The same error should most likely happen with omapdrm
and omap_vout also.

To fix this, add an "initialized" state to omapdss. When omapdss has
been probed, it's marked as initialized. omapfb, omapdrm and omap_vout
check this state when they are probed to see that omapdss is actually
there.

Signed-off-by: Tomi Valkeinen <[email protected]>
Tested-by: Peter Ujfalusi <[email protected]>
This commit is contained in:
Tomi Valkeinen 2013-05-23 12:07:50 +03:00
commit 591a0ac7f1
5 changed files with 29 additions and 1 deletions
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3
drivers/media/platform/omap/omap_vout.c
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@ -2144,6 +2144,9 @@ static int __init omap_vout_probe(struct platform_device *pdev)
struct omap_dss_device *def_display;
struct omap2video_device *vid_dev = NULL;
if (omapdss_is_initialized() == false)
return -EPROBE_DEFER;
ret = omapdss_compat_init();
if (ret) {
dev_err(&pdev->dev, "failed to init dss\n");