OMAPDSS: APPLY: add fifo merge support funcs

Add mechanism to set/unset the DISPC fifo-merge:

Add new fields to dss_data, fifo_merge and fifo_merge_dirty. These are
similar to the other info/dirty flags in ovl_priv_data and ovl_mgr_data,
but fifo merge is a common attribute to all managers and thus outside
the ovl_mgr_data.

The fifo-merge field is used in the dss_write_regs_common, which handles
writing the register.

dss_apply_fifo_merge() can be used to set/unset the fifo merge field in
the dss_data.

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

1 files changed, 43 insertions, 0 deletions

diff --git a/drivers/video/omap2/dss/apply.c b/drivers/video/omap2/dss/apply.c
index 052dc874cd3d..604737f1187d 100644
--- a/drivers/video/omap2/dss/apply.c
+++ b/drivers/video/omap2/dss/apply.c
@@ -105,6 +105,9 @@ static struct {
         struct ovl_priv_data ovl_priv_data_array[MAX_DSS_OVERLAYS];
         struct mgr_priv_data mgr_priv_data_array[MAX_DSS_MANAGERS];
 
+        bool fifo_merge_dirty;
+        bool fifo_merge;
+
         bool irq_enabled;
 } dss_data;
 
@@ -585,11 +588,40 @@ static void dss_mgr_write_regs(struct omap_overlay_manager *mgr)
         }
 }
 
+static void dss_write_regs_common(void)
+{
+        const int num_mgrs = omap_dss_get_num_overlay_managers();
+        int i;
+
+        if (!dss_data.fifo_merge_dirty)
+                return;
+
+        for (i = 0; i < num_mgrs; ++i) {
+                struct omap_overlay_manager *mgr;
+                struct mgr_priv_data *mp;
+
+                mgr = omap_dss_get_overlay_manager(i);
+                mp = get_mgr_priv(mgr);
+
+                if (mp->enabled) {
+                        if (dss_data.fifo_merge_dirty) {
+                                dispc_enable_fifomerge(dss_data.fifo_merge);
+                                dss_data.fifo_merge_dirty = false;
+                        }
+
+                        if (mp->updating)
+                                mp->shadow_info_dirty = true;
+                }
+        }
+}
+
 static void dss_write_regs(void)
 {
         const int num_mgrs = omap_dss_get_num_overlay_managers();
         int i;
 
+        dss_write_regs_common();
+
         for (i = 0; i < num_mgrs; ++i) {
                 struct omap_overlay_manager *mgr;
                 struct mgr_priv_data *mp;
@@ -659,6 +691,8 @@ void dss_mgr_start_update(struct omap_overlay_manager *mgr)
 
         dss_mgr_write_regs(mgr);
 
+        dss_write_regs_common();
+
         mp->updating = true;
 
         if (!dss_data.irq_enabled && need_isr())
@@ -859,6 +893,15 @@ static void dss_apply_ovl_fifo_thresholds(struct omap_overlay *ovl,
         op->extra_info_dirty = true;
 }
 
+static void dss_apply_fifo_merge(bool use_fifo_merge)
+{
+        if (dss_data.fifo_merge == use_fifo_merge)
+                return;
+
+        dss_data.fifo_merge = use_fifo_merge;
+        dss_data.fifo_merge_dirty = true;
+}
+
 static void dss_ovl_setup_fifo(struct omap_overlay *ovl)
 {
         struct ovl_priv_data *op = get_ovl_priv(ovl);