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path: root/drivers/gpu/ipu-v3/ipu-smfc.c
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Diffstat (limited to 'drivers/gpu/ipu-v3/ipu-smfc.c')
-rw-r--r--drivers/gpu/ipu-v3/ipu-smfc.c157
1 files changed, 134 insertions, 23 deletions
diff --git a/drivers/gpu/ipu-v3/ipu-smfc.c b/drivers/gpu/ipu-v3/ipu-smfc.c
index e4f85ad286fc..4ef910991413 100644
--- a/drivers/gpu/ipu-v3/ipu-smfc.c
+++ b/drivers/gpu/ipu-v3/ipu-smfc.c
@@ -8,7 +8,6 @@
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
-#define DEBUG
#include <linux/export.h>
#include <linux/types.h>
#include <linux/init.h>
@@ -21,9 +20,18 @@
#include "ipu-prv.h"
+struct ipu_smfc {
+ struct ipu_smfc_priv *priv;
+ int chno;
+ bool inuse;
+};
+
struct ipu_smfc_priv {
void __iomem *base;
spinlock_t lock;
+ struct ipu_soc *ipu;
+ struct ipu_smfc channel[4];
+ int use_count;
};
/*SMFC Registers */
@@ -31,63 +39,166 @@ struct ipu_smfc_priv {
#define SMFC_WMC 0x0004
#define SMFC_BS 0x0008
-int ipu_smfc_set_burstsize(struct ipu_soc *ipu, int channel, int burstsize)
+int ipu_smfc_set_burstsize(struct ipu_smfc *smfc, int burstsize)
{
- struct ipu_smfc_priv *smfc = ipu->smfc_priv;
+ struct ipu_smfc_priv *priv = smfc->priv;
unsigned long flags;
u32 val, shift;
- spin_lock_irqsave(&smfc->lock, flags);
+ spin_lock_irqsave(&priv->lock, flags);
- shift = channel * 4;
- val = readl(smfc->base + SMFC_BS);
+ shift = smfc->chno * 4;
+ val = readl(priv->base + SMFC_BS);
val &= ~(0xf << shift);
val |= burstsize << shift;
- writel(val, smfc->base + SMFC_BS);
+ writel(val, priv->base + SMFC_BS);
- spin_unlock_irqrestore(&smfc->lock, flags);
+ spin_unlock_irqrestore(&priv->lock, flags);
return 0;
}
EXPORT_SYMBOL_GPL(ipu_smfc_set_burstsize);
-int ipu_smfc_map_channel(struct ipu_soc *ipu, int channel, int csi_id, int mipi_id)
+int ipu_smfc_map_channel(struct ipu_smfc *smfc, int csi_id, int mipi_id)
{
- struct ipu_smfc_priv *smfc = ipu->smfc_priv;
+ struct ipu_smfc_priv *priv = smfc->priv;
unsigned long flags;
u32 val, shift;
- spin_lock_irqsave(&smfc->lock, flags);
+ spin_lock_irqsave(&priv->lock, flags);
- shift = channel * 3;
- val = readl(smfc->base + SMFC_MAP);
+ shift = smfc->chno * 3;
+ val = readl(priv->base + SMFC_MAP);
val &= ~(0x7 << shift);
val |= ((csi_id << 2) | mipi_id) << shift;
- writel(val, smfc->base + SMFC_MAP);
+ writel(val, priv->base + SMFC_MAP);
- spin_unlock_irqrestore(&smfc->lock, flags);
+ spin_unlock_irqrestore(&priv->lock, flags);
return 0;
}
EXPORT_SYMBOL_GPL(ipu_smfc_map_channel);
+int ipu_smfc_set_watermark(struct ipu_smfc *smfc, u32 set_level, u32 clr_level)
+{
+ struct ipu_smfc_priv *priv = smfc->priv;
+ unsigned long flags;
+ u32 val, shift;
+
+ spin_lock_irqsave(&priv->lock, flags);
+
+ shift = smfc->chno * 6 + (smfc->chno > 1 ? 4 : 0);
+ val = readl(priv->base + SMFC_WMC);
+ val &= ~(0x3f << shift);
+ val |= ((clr_level << 3) | set_level) << shift;
+ writel(val, priv->base + SMFC_WMC);
+
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(ipu_smfc_set_watermark);
+
+int ipu_smfc_enable(struct ipu_smfc *smfc)
+{
+ struct ipu_smfc_priv *priv = smfc->priv;
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->lock, flags);
+
+ if (!priv->use_count)
+ ipu_module_enable(priv->ipu, IPU_CONF_SMFC_EN);
+
+ priv->use_count++;
+
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(ipu_smfc_enable);
+
+int ipu_smfc_disable(struct ipu_smfc *smfc)
+{
+ struct ipu_smfc_priv *priv = smfc->priv;
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->lock, flags);
+
+ priv->use_count--;
+
+ if (!priv->use_count)
+ ipu_module_disable(priv->ipu, IPU_CONF_SMFC_EN);
+
+ if (priv->use_count < 0)
+ priv->use_count = 0;
+
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(ipu_smfc_disable);
+
+struct ipu_smfc *ipu_smfc_get(struct ipu_soc *ipu, unsigned int chno)
+{
+ struct ipu_smfc_priv *priv = ipu->smfc_priv;
+ struct ipu_smfc *smfc, *ret;
+ unsigned long flags;
+
+ if (chno >= 4)
+ return ERR_PTR(-EINVAL);
+
+ smfc = &priv->channel[chno];
+ ret = smfc;
+
+ spin_lock_irqsave(&priv->lock, flags);
+
+ if (smfc->inuse) {
+ ret = ERR_PTR(-EBUSY);
+ goto unlock;
+ }
+
+ smfc->inuse = true;
+unlock:
+ spin_unlock_irqrestore(&priv->lock, flags);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(ipu_smfc_get);
+
+void ipu_smfc_put(struct ipu_smfc *smfc)
+{
+ struct ipu_smfc_priv *priv = smfc->priv;
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->lock, flags);
+ smfc->inuse = false;
+ spin_unlock_irqrestore(&priv->lock, flags);
+}
+EXPORT_SYMBOL_GPL(ipu_smfc_put);
+
int ipu_smfc_init(struct ipu_soc *ipu, struct device *dev,
unsigned long base)
{
- struct ipu_smfc_priv *smfc;
+ struct ipu_smfc_priv *priv;
+ int i;
- smfc = devm_kzalloc(dev, sizeof(*smfc), GFP_KERNEL);
- if (!smfc)
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
return -ENOMEM;
- ipu->smfc_priv = smfc;
- spin_lock_init(&smfc->lock);
+ ipu->smfc_priv = priv;
+ spin_lock_init(&priv->lock);
+ priv->ipu = ipu;
- smfc->base = devm_ioremap(dev, base, PAGE_SIZE);
- if (!smfc->base)
+ priv->base = devm_ioremap(dev, base, PAGE_SIZE);
+ if (!priv->base)
return -ENOMEM;
- pr_debug("%s: ioremap 0x%08lx -> %p\n", __func__, base, smfc->base);
+ for (i = 0; i < 4; i++) {
+ priv->channel[i].priv = priv;
+ priv->channel[i].chno = i;
+ }
+
+ pr_debug("%s: ioremap 0x%08lx -> %p\n", __func__, base, priv->base);
return 0;
}