OMAPDSS: DISPC: pclk & lclk rates for writeback

Change the dispc_plane_pclk_rate and dispc_plane_lclk_rate functions to
return 0 if the given plane is the writeback plane. The clocks are not
valid for WB, but returning 0 from these functions instead of running
into BUG() will simplify the code that uses these functions.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

1 files changed, 12 insertions, 2 deletions

diff --git a/drivers/video/omap2/dss/dispc.c b/drivers/video/omap2/dss/dispc.c
index 531961424d3..fff26fd5d17 100644
--- a/drivers/video/omap2/dss/dispc.c
+++ b/drivers/video/omap2/dss/dispc.c
@@ -3232,14 +3232,24 @@ unsigned long dispc_core_clk_rate(void)
 
 static unsigned long dispc_plane_pclk_rate(enum omap_plane plane)
 {
-        enum omap_channel channel = dispc_ovl_get_channel_out(plane);
+        enum omap_channel channel;
+
+        if (plane == OMAP_DSS_WB)
+                return 0;
+
+        channel = dispc_ovl_get_channel_out(plane);
 
         return dispc_mgr_pclk_rate(channel);
 }
 
 static unsigned long dispc_plane_lclk_rate(enum omap_plane plane)
 {
-        enum omap_channel channel = dispc_ovl_get_channel_out(plane);
+        enum omap_channel channel;
+
+        if (plane == OMAP_DSS_WB)
+                return 0;
+
+        channel = dispc_ovl_get_channel_out(plane);
 
         return dispc_mgr_lclk_rate(channel);
 }