[U-Boot] [PATCH 4/4] mx6: Allow configuring the NoC registers on i.MX6QP

[Fabio Estevam <festevam@gmail.com>]

The NoC registers on i.MX6QP needs to be configured, otherwise some
usecases in the kernel behave incorrectly, such as rotation and resize.

Currently the NoC registers are not configured in the kernel, so
configure them in U-Boot like it is done in the NXP U-Boot tree.

Signed-off-by: Fabio Estevam <festevam@gmail.com>
---
 arch/arm/mach-imx/mx6/soc.c | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/arch/arm/mach-imx/mx6/soc.c b/arch/arm/mach-imx/mx6/soc.c
index e80f1d484b..8de42408c7 100644
--- a/arch/arm/mach-imx/mx6/soc.c
+++ b/arch/arm/mach-imx/mx6/soc.c
@@ -365,6 +365,35 @@ static void init_bandgap(void)
 	}
 }
 
+static void noc_setup(void)
+{
+	enable_ipu_clock();
+
+	writel(0x80000201, 0xbb0608);
+	/* Bypass IPU1 QoS generator */
+	writel(0x00000002, 0x00bb048c);
+	/* Bypass IPU2 QoS generator */
+	writel(0x00000002, 0x00bb050c);
+	/* Bandwidth THR for of PRE0 */
+	writel(0x00000200, 0x00bb0690);
+	/* Bandwidth THR for of PRE1 */
+	writel(0x00000200, 0x00bb0710);
+	/* Bandwidth THR for of PRE2 */
+	writel(0x00000200, 0x00bb0790);
+	/* Bandwidth THR for of PRE3 */
+	writel(0x00000200, 0x00bb0810);
+	/* Saturation THR for of PRE0 */
+	writel(0x00000010, 0x00bb0694);
+	/* Saturation THR for of PRE1 */
+	writel(0x00000010, 0x00bb0714);
+	/* Saturation THR for of PRE2 */
+	writel(0x00000010, 0x00bb0794);
+	/* Saturation THR for of PRE */
+	writel(0x00000010, 0x00bb0814);
+
+	disable_ipu_clock();
+}
+
 int arch_cpu_init(void)
 {
 	struct mxc_ccm_reg *ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
@@ -442,6 +471,9 @@ int arch_cpu_init(void)
 
 	init_src();
 
+	if (is_mx6dqp())
+		noc_setup();
+
 	return 0;
 }
 
-- 
2.17.1