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OMAPDSS: APPLY: skip enable/disable if already enabled/disabled

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Add checks to dss_mgr_enable, dss_mgr_disable, dss_ovl_enable,
dss_ovl_disable that check if the state is already the same as given in
the parameters, and exit if so.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
This commit is contained in:
Tomi Valkeinen 2011-11-16 16:01:33 +02:00
parent 841c09c797
commit e4f7ad702e
1 changed files with 18 additions and 0 deletions
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18
drivers/video/omap2/dss/apply.c
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@ -724,6 +724,9 @@ void dss_mgr_enable(struct omap_overlay_manager *mgr)
mutex_lock(&apply_lock);
if (mp->enabled)
goto out;
spin_lock_irqsave(&data_lock, flags);
mp->enabled = true;
@ -740,6 +743,7 @@ void dss_mgr_enable(struct omap_overlay_manager *mgr)
if (!mgr_manual_update(mgr))
dispc_mgr_enable(mgr->id, true);
out:
mutex_unlock(&apply_lock);
}
@ -750,6 +754,9 @@ void dss_mgr_disable(struct omap_overlay_manager *mgr)
mutex_lock(&apply_lock);
if (!mp->enabled)
goto out;
if (!mgr_manual_update(mgr))
dispc_mgr_enable(mgr->id, false);
@ -760,6 +767,7 @@ void dss_mgr_disable(struct omap_overlay_manager *mgr)
spin_unlock_irqrestore(&data_lock, flags);
out:
mutex_unlock(&apply_lock);
}
@ -1005,6 +1013,11 @@ int dss_ovl_enable(struct omap_overlay *ovl)
mutex_lock(&apply_lock);
if (op->enabled) {
r = 0;
goto err;
}
if (ovl->manager == NULL || ovl->manager->device == NULL) {
r = -EINVAL;
goto err;
@ -1036,6 +1049,11 @@ int dss_ovl_disable(struct omap_overlay *ovl)
mutex_lock(&apply_lock);
if (!op->enabled) {
r = 0;
goto err;
}
if (ovl->manager == NULL || ovl->manager->device == NULL) {
r = -EINVAL;
goto err;