linux-kernel - [PATCH 06/16] gpu: ipu-v3: Add ipu_set_vdi_src

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Date:	Thu,  7 Jul 2016 16:03:31 -0700
From:	Steve Longerbeam <slongerbeam@...il.com>
To:	p.zabel@...gutronix.de
Cc:	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
	Steve Longerbeam <steve_longerbeam@...tor.com>
Subject: [PATCH 06/16] gpu: ipu-v3: Add ipu_set_vdi_src_mux()

Adds ipu_set_vdi_src_mux() that selects the VDIC input
(from CSI or memory).

Signed-off-by: Steve Longerbeam <steve_longerbeam@...tor.com>
---
 drivers/gpu/ipu-v3/ipu-common.c | 20 ++++++++++++++++++++
 include/video/imx-ipu-v3.h      |  1 +
 2 files changed, 21 insertions(+)

diff --git a/drivers/gpu/ipu-v3/ipu-common.c b/drivers/gpu/ipu-v3/ipu-common.c
index 6d1676e..374100e 100644
--- a/drivers/gpu/ipu-v3/ipu-common.c
+++ b/drivers/gpu/ipu-v3/ipu-common.c
@@ -730,6 +730,26 @@ void ipu_set_ic_src_mux(struct ipu_soc *ipu, int csi_id, bool vdi)
 }
 EXPORT_SYMBOL_GPL(ipu_set_ic_src_mux);
 
+/*
+ * Set the source for the VDIC. Selects either from CSI[01] or memory.
+ */
+void ipu_set_vdi_src_mux(struct ipu_soc *ipu, bool csi)
+{
+	unsigned long flags;
+	u32 val;
+
+	spin_lock_irqsave(&ipu->lock, flags);
+
+	val = ipu_cm_read(ipu, IPU_FS_PROC_FLOW1);
+	val &= ~(0x3 << 28);
+	if (csi)
+		val |= (0x01 << 28);
+	ipu_cm_write(ipu, val, IPU_FS_PROC_FLOW1);
+
+	spin_unlock_irqrestore(&ipu->lock, flags);
+}
+EXPORT_SYMBOL_GPL(ipu_set_vdi_src_mux);
+
 
 /* IDMAC Channel Linking */
 
diff --git a/include/video/imx-ipu-v3.h b/include/video/imx-ipu-v3.h
index 0a39c64..586979e 100644
--- a/include/video/imx-ipu-v3.h
+++ b/include/video/imx-ipu-v3.h
@@ -152,6 +152,7 @@ int ipu_idmac_channel_irq(struct ipu_soc *ipu, struct ipuv3_channel *channel,
 int ipu_get_num(struct ipu_soc *ipu);
 void ipu_set_csi_src_mux(struct ipu_soc *ipu, int csi_id, bool mipi_csi2);
 void ipu_set_ic_src_mux(struct ipu_soc *ipu, int csi_id, bool vdi);
+void ipu_set_vdi_src_mux(struct ipu_soc *ipu, bool csi);
 void ipu_dump(struct ipu_soc *ipu);
 
 /*
-- 
1.9.1