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authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2012-03-15 16:18:17 +0400
committerLaurent Pinchart <laurent.pinchart@ideasonboard.com>2012-07-19 04:05:22 +0400
commit239921ec1d969e904676f444a92e6d68a928d98c (patch)
tree44b8fbf6a560ed526d926c40fec48043d469ff46
parent6e729b416b44296f5ed503b40ac58c2bffb43caf (diff)
downloadlinux-239921ec1d969e904676f444a92e6d68a928d98c.tar.xz
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>
-rw-r--r--drivers/video/sh_mobile_meram.c41
-rw-r--r--include/video/sh_mobile_meram.h16
2 files changed, 53 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,
diff --git a/include/video/sh_mobile_meram.h b/include/video/sh_mobile_meram.h
index 11348379f093..062e6e7f955c 100644
--- a/include/video/sh_mobile_meram.h
+++ b/include/video/sh_mobile_meram.h
@@ -38,6 +38,10 @@ struct sh_mobile_meram_cfg {
#if defined(CONFIG_FB_SH_MOBILE_MERAM) || \
defined(CONFIG_FB_SH_MOBILE_MERAM_MODULE)
+unsigned long sh_mobile_meram_alloc(struct sh_mobile_meram_info *meram_dev,
+ size_t size);
+void sh_mobile_meram_free(struct sh_mobile_meram_info *meram_dev,
+ unsigned long mem, size_t size);
void *sh_mobile_meram_cache_alloc(struct sh_mobile_meram_info *dev,
const struct sh_mobile_meram_cfg *cfg,
unsigned int xres, unsigned int yres,
@@ -50,6 +54,18 @@ void sh_mobile_meram_cache_update(struct sh_mobile_meram_info *dev, void *data,
unsigned long *icb_addr_y,
unsigned long *icb_addr_c);
#else
+static inline unsigned long
+sh_mobile_meram_alloc(struct sh_mobile_meram_info *meram_dev, size_t size)
+{
+ return 0;
+}
+
+static inline void
+sh_mobile_meram_free(struct sh_mobile_meram_info *meram_dev,
+ unsigned long mem, size_t size)
+{
+}
+
static inline void *
sh_mobile_meram_cache_alloc(struct sh_mobile_meram_info *dev,
const struct sh_mobile_meram_cfg *cfg,