OMAP: DSS2: Use PM runtime & HWMOD support

Use PM runtime and HWMOD support to handle enabling and disabling of DSS
modules.

Each DSS module will have get and put functions which can be used to
enable and disable that module. The functions use pm_runtime and hwmod
opt-clocks to enable the hardware.

Acked-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

1 files changed, 18 insertions, 6 deletions

diff --git a/drivers/video/omap2/dss/overlay.c b/drivers/video/omap2/dss/overlay.c
index cfbfc57e9582..c84380c53c39 100644
--- a/drivers/video/omap2/dss/overlay.c
+++ b/drivers/video/omap2/dss/overlay.c
@@ -84,32 +84,42 @@ static ssize_t overlay_manager_store(struct omap_overlay *ovl, const char *buf,
 
 	old_mgr = ovl->manager;
 
+	r = dispc_runtime_get();
+	if (r)
+		return r;
+
 	/* detach old manager */
 	if (old_mgr) {
 		r = ovl->unset_manager(ovl);
 		if (r) {
 			DSSERR("detach failed\n");
-			return r;
+			goto err;
 		}
 
 		r = old_mgr->apply(old_mgr);
 		if (r)
-			return r;
+			goto err;
 	}
 
 	if (mgr) {
 		r = ovl->set_manager(ovl, mgr);
 		if (r) {
 			DSSERR("Failed to attach overlay\n");
-			return r;
+			goto err;
 		}
 
 		r = mgr->apply(mgr);
 		if (r)
-			return r;
+			goto err;
 	}
 
+	dispc_runtime_put();
+
 	return size;
+
+err:
+	dispc_runtime_put();
+	return r;
 }
 
 static ssize_t overlay_input_size_show(struct omap_overlay *ovl, char *buf)
@@ -507,7 +517,6 @@ static int omap_dss_set_manager(struct omap_overlay *ovl,
 
 	ovl->manager = mgr;
 
-	dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK);
 	/* XXX: When there is an overlay on a DSI manual update display, and
 	 * the overlay is first disabled, then moved to tv, and enabled, we
 	 * seem to get SYNC_LOST_DIGIT error.
@@ -521,7 +530,6 @@ static int omap_dss_set_manager(struct omap_overlay *ovl,
 	 * the overlay, but before moving the overlay to TV.
 	 */
 	dispc_set_channel_out(ovl->id, mgr->id);
-	dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK);
 
 	return 0;
 }
@@ -722,6 +730,8 @@ void dss_recheck_connections(struct omap_dss_device *dssdev, bool force)
 	}
 
 	if (mgr) {
+		dispc_runtime_get();
+
 		for (i = 0; i < dss_feat_get_num_ovls(); i++) {
 			struct omap_overlay *ovl;
 			ovl = omap_dss_get_overlay(i);
@@ -731,6 +741,8 @@ void dss_recheck_connections(struct omap_dss_device *dssdev, bool force)
 				omap_dss_set_manager(ovl, mgr);
 			}
 		}
+
+		dispc_runtime_put();
 	}
 }