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drm/omap: Use omapdss_stack_is_ready() to check that the display stack is up 

Instead of 'guessing' based on aliases of the status of the DSS drivers,
use the new interface to check that all needed drivers are loaded.
In this way we can be sure that all needed drivers are loaded so it is
safe to continue the probing of omapdrm.
This method will allow the omapdrm to be probed 'headless', without
outputs.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
This commit is contained in:
Peter Ujfalusi 2016-05-03 22:08:01 +03:00 committed by Tomi Valkeinen
parent 1e08c82268
commit a09d2bc150
1 changed files with 3 additions and 6 deletions
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9
drivers/gpu/drm/omapdrm/omap_drv.c
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@ -250,7 +250,9 @@ static int omap_connect_dssdevs(void)
{
int r;
struct omap_dss_device *dssdev = NULL;
bool no_displays = true;
if (!omapdss_stack_is_ready())
return -EPROBE_DEFER;
for_each_dss_dev(dssdev) {
r = dssdev->driver->connect(dssdev);
@ -260,14 +262,9 @@ static int omap_connect_dssdevs(void)
} else if (r) {
dev_warn(dssdev->dev, "could not connect display: %s\n",
dssdev->name);
} else {
no_displays = false;
}
}
if (no_displays)
return -EPROBE_DEFER;
return 0;
cleanup: