OMAP: DSS2: Taal: Optimize enable_te, rotate, mirror when value unchanged

Skip any further processing of taal_enable_te(), taal_rotate(), and
taal_mirror() if value remains unchanged.

Signed-off-by: Jani Nikula <ext-jani.1.nikula@nokia.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/drivers/video/omap2/displays/panel-taal.c b/drivers/video/omap2/displays/panel-taal.c
index 6848e3633ed9..e1c765d11419 100644
--- a/drivers/video/omap2/displays/panel-taal.c
+++ b/drivers/video/omap2/displays/panel-taal.c
@@ -1210,6 +1210,10 @@ static int taal_enable_te(struct omap_dss_device *dssdev, bool enable)
         int r;
 
         mutex_lock(&td->lock);
+
+        if (td->te_enabled == enable)
+                goto end;
+
         dsi_bus_lock();
 
         if (td->enabled) {
@@ -1221,6 +1225,7 @@ static int taal_enable_te(struct omap_dss_device *dssdev, bool enable)
         td->te_enabled = enable;
 
         dsi_bus_unlock();
+end:
         mutex_unlock(&td->lock);
 
         return 0;
@@ -1251,6 +1256,10 @@ static int taal_rotate(struct omap_dss_device *dssdev, u8 rotate)
         dev_dbg(&dssdev->dev, "rotate %d\n", rotate);
 
         mutex_lock(&td->lock);
+
+        if (td->rotate == rotate)
+                goto end;
+
         dsi_bus_lock();
 
         if (td->enabled) {
@@ -1262,6 +1271,7 @@ static int taal_rotate(struct omap_dss_device *dssdev, u8 rotate)
         td->rotate = rotate;
 
         dsi_bus_unlock();
+end:
         mutex_unlock(&td->lock);
         return 0;
 err:
@@ -1290,6 +1300,10 @@ static int taal_mirror(struct omap_dss_device *dssdev, bool enable)
         dev_dbg(&dssdev->dev, "mirror %d\n", enable);
 
         mutex_lock(&td->lock);
+
+        if (td->mirror == enable)
+                goto end;
+
         dsi_bus_lock();
         if (td->enabled) {
                 r = taal_set_addr_mode(td->rotate, enable);
@@ -1300,6 +1314,7 @@ static int taal_mirror(struct omap_dss_device *dssdev, bool enable)
         td->mirror = enable;
 
         dsi_bus_unlock();
+end:
         mutex_unlock(&td->lock);
         return 0;
 err: