sh_mobile_meram: Add direct MERAM allocation API

The API can be used to allocate and free MERAM blocks directly, without
going through ICBs.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

1 files changed, 37 insertions, 4 deletions

diff --git a/drivers/video/sh_mobile_meram.c b/drivers/video/sh_mobile_meram.c
index fdb6fc1decb0..7a0ba8bb3fbe 100644
--- a/drivers/video/sh_mobile_meram.c
+++ b/drivers/video/sh_mobile_meram.c
@@ -195,6 +195,21 @@ static inline unsigned long meram_read_reg(void __iomem *base, unsigned int off)
 }
 
 /* -----------------------------------------------------------------------------
+ * MERAM allocation and free
+ */
+
+static unsigned long meram_alloc(struct sh_mobile_meram_priv *priv, size_t size)
+{
+        return gen_pool_alloc(priv->pool, size);
+}
+
+static void meram_free(struct sh_mobile_meram_priv *priv, unsigned long mem,
+                       size_t size)
+{
+        gen_pool_free(priv->pool, mem, size);
+}
+
+/* -----------------------------------------------------------------------------
  * LCDC cache planes allocation, init, cleanup and free
  */
 
@@ -216,7 +231,7 @@ static int meram_plane_alloc(struct sh_mobile_meram_priv *priv,
                 return -ENOMEM;
         plane->marker = &priv->icbs[idx];
 
-        mem = gen_pool_alloc(priv->pool, size * 1024);
+        mem = meram_alloc(priv, size * 1024);
         if (mem == 0)
                 return -ENOMEM;
 
@@ -233,8 +248,8 @@ static int meram_plane_alloc(struct sh_mobile_meram_priv *priv,
 static void meram_plane_free(struct sh_mobile_meram_priv *priv,
                              struct sh_mobile_meram_fb_plane *plane)
 {
-        gen_pool_free(priv->pool, priv->meram + plane->marker->offset,
-                      plane->marker->size * 1024);
+        meram_free(priv, priv->meram + plane->marker->offset,
+                   plane->marker->size * 1024);
 
         __clear_bit(plane->marker->index, &priv->used_icb);
         __clear_bit(plane->cache->index, &priv->used_icb);
@@ -386,9 +401,27 @@ static void meram_plane_cleanup(struct sh_mobile_meram_priv *priv,
 }
 
 /* -----------------------------------------------------------------------------
- * LCDC cache operations
+ * MERAM operations
  */
 
+unsigned long sh_mobile_meram_alloc(struct sh_mobile_meram_info *pdata,
+                                    size_t size)
+{
+        struct sh_mobile_meram_priv *priv = pdata->priv;
+
+        return meram_alloc(priv, size);
+}
+EXPORT_SYMBOL_GPL(sh_mobile_meram_alloc);
+
+void sh_mobile_meram_free(struct sh_mobile_meram_info *pdata, unsigned long mem,
+                          size_t size)
+{
+        struct sh_mobile_meram_priv *priv = pdata->priv;
+
+        meram_free(priv, mem, size);
+}
+EXPORT_SYMBOL_GPL(sh_mobile_meram_free);
+
 /* Allocate memory for the ICBs and mark them as used. */
 static struct sh_mobile_meram_fb_cache *
 meram_cache_alloc(struct sh_mobile_meram_priv *priv,