omap3isp: Skip CSI-2 receiver initialisation in CCP2 configuration

If the CSI-2 receiver isn't part of the pipeline (or isn't there to begin
with), skip its initialisation.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
diff --git a/drivers/media/platform/omap3isp/ispcsiphy.c b/drivers/media/platform/omap3isp/ispcsiphy.c
index 3bc0702..dc956f0 100644
--- a/drivers/media/platform/omap3isp/ispcsiphy.c
+++ b/drivers/media/platform/omap3isp/ispcsiphy.c
@@ -155,6 +155,19 @@
 	return 0;
 }
 
+static struct isp_pipeline *phy_to_isp_pipeline(struct isp_csiphy *phy)
+{
+	if (phy->csi2 && phy->csi2->subdev.entity.pipe)
+		return to_isp_pipeline(&phy->csi2->subdev.entity);
+
+	if (phy->isp->isp_ccp2.subdev.entity.pipe)
+		return to_isp_pipeline(&phy->isp->isp_ccp2.subdev.entity);
+
+	__WARN();
+
+	return NULL;
+}
+
 /*
  * TCLK values are OK at their reset values
  */
@@ -164,15 +177,18 @@
 
 static int omap3isp_csiphy_config(struct isp_csiphy *phy)
 {
-	struct isp_csi2_device *csi2 = phy->csi2;
-	struct isp_pipeline *pipe = to_isp_pipeline(&csi2->subdev.entity);
-	struct isp_bus_cfg *buscfg = pipe->external->host_priv;
+	struct isp_pipeline *pipe = phy_to_isp_pipeline(phy);
+	struct isp_bus_cfg *buscfg;
 	struct isp_csiphy_lanes_cfg *lanes;
 	int csi2_ddrclk_khz;
 	unsigned int num_data_lanes, used_lanes = 0;
 	unsigned int i;
 	u32 reg;
 
+	if (!pipe)
+		return -EBUSY;
+
+	buscfg = pipe->external->host_priv;
 	if (!buscfg) {
 		struct isp_async_subdev *isd =
 			container_of(pipe->external->asd,
@@ -222,7 +238,7 @@
 	csi2_ddrclk_khz = pipe->external_rate / 1000
 		/ (2 * hweight32(used_lanes)) * pipe->external_width;
 
-	reg = isp_reg_readl(csi2->isp, phy->phy_regs, ISPCSIPHY_REG0);
+	reg = isp_reg_readl(phy->isp, phy->phy_regs, ISPCSIPHY_REG0);
 
 	reg &= ~(ISPCSIPHY_REG0_THS_TERM_MASK |
 		 ISPCSIPHY_REG0_THS_SETTLE_MASK);
@@ -233,9 +249,9 @@
 	reg |= (DIV_ROUND_UP(90 * csi2_ddrclk_khz, 1000000) + 3)
 		<< ISPCSIPHY_REG0_THS_SETTLE_SHIFT;
 
-	isp_reg_writel(csi2->isp, reg, phy->phy_regs, ISPCSIPHY_REG0);
+	isp_reg_writel(phy->isp, reg, phy->phy_regs, ISPCSIPHY_REG0);
 
-	reg = isp_reg_readl(csi2->isp, phy->phy_regs, ISPCSIPHY_REG1);
+	reg = isp_reg_readl(phy->isp, phy->phy_regs, ISPCSIPHY_REG1);
 
 	reg &= ~(ISPCSIPHY_REG1_TCLK_TERM_MASK |
 		 ISPCSIPHY_REG1_TCLK_MISS_MASK |
@@ -244,10 +260,10 @@
 	reg |= TCLK_MISS << ISPCSIPHY_REG1_TCLK_MISS_SHIFT;
 	reg |= TCLK_SETTLE << ISPCSIPHY_REG1_TCLK_SETTLE_SHIFT;
 
-	isp_reg_writel(csi2->isp, reg, phy->phy_regs, ISPCSIPHY_REG1);
+	isp_reg_writel(phy->isp, reg, phy->phy_regs, ISPCSIPHY_REG1);
 
 	/* DPHY lane configuration */
-	reg = isp_reg_readl(csi2->isp, phy->cfg_regs, ISPCSI2_PHY_CFG);
+	reg = isp_reg_readl(phy->isp, phy->cfg_regs, ISPCSI2_PHY_CFG);
 
 	for (i = 0; i < num_data_lanes; i++) {
 		reg &= ~(ISPCSI2_PHY_CFG_DATA_POL_MASK(i + 1) |
@@ -263,7 +279,7 @@
 	reg |= lanes->clk.pol << ISPCSI2_PHY_CFG_CLOCK_POL_SHIFT;
 	reg |= lanes->clk.pos << ISPCSI2_PHY_CFG_CLOCK_POSITION_SHIFT;
 
-	isp_reg_writel(csi2->isp, reg, phy->cfg_regs, ISPCSI2_PHY_CFG);
+	isp_reg_writel(phy->isp, reg, phy->cfg_regs, ISPCSI2_PHY_CFG);
 
 	return 0;
 }
@@ -311,11 +327,10 @@
 
 void omap3isp_csiphy_release(struct isp_csiphy *phy)
 {
+	struct isp_pipeline *pipe = phy_to_isp_pipeline(phy);
+
 	mutex_lock(&phy->mutex);
-	if (phy->phy_in_use) {
-		struct isp_csi2_device *csi2 = phy->csi2;
-		struct isp_pipeline *pipe =
-			to_isp_pipeline(&csi2->subdev.entity);
+	if (phy->phy_in_use && phy) {
 		struct isp_bus_cfg *buscfg = pipe->external->host_priv;
 
 		csiphy_routing_cfg(phy, buscfg->interface, false,