SK-AM62A-LP: FPD-Link camera get broken image

Terry pan

Prodigy 20 points

Part Number: SK-AM62A-LP

Tool/software:

Hi experts,

We use SK-AM62A-LP board with a custom RGB+IR camera module.

The camera module use ub971 and am62a board use CSI2 to connect ub9702 to link camera.

They run in FPD-link IV mode.

When we run gst-launch-1.0 command to display, the stream show broken image and flickering.

I check the ub9702 register, it shows:

reg 0x4d = 0x33 or 0x13

reg 0x4e = 0xed

reg 0x7a = 0x0f

The LOCK_STS_CHG bit is always 1.

Dose it mean the link unstable?

Is there any way to improve it or tune it.

Regards,

Terry

5 days ago

0 Jianzhong Xu 4 days ago

TI__Guru 52895 points

Hello Terry,

We've recently identified a potential issue in the UB960 driver (which is supposed to be compatible for UB9702). Can you try the following patch (based on SDK 10.1) on git.ti.com/.../ds90ub960.c

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diff --git a/drivers/media/i2c/ds90ub960.c b/drivers/media/i2c/ds90ub960.c
index 0b708c90c06b..5ce3e847d360 100644
--- a/drivers/media/i2c/ds90ub960.c
+++ b/drivers/media/i2c/ds90ub960.c
@@ -2527,9 +2527,16 @@ static int ub960_configure_ports_for_streaming(struct ub960_data *priv,
 
                                /* Map all VCs from this port to VC(nport) */
                                for (i = 0; i < 8; i++)
-                                       ub960_rxport_write(priv, nport,
+                                       if(nport==0 && i==0) {
+                                                ub960_rxport_write(priv, nport,
+                                                           UB960_RR_VC_ID_MAP(i),
+                                                          0x10); /* map VC0 to VC0 and map VC1 to VC1 */
+
+                                       } else {
+                                               ub960_rxport_write(priv, nport,
                                                           UB960_RR_VC_ID_MAP(i),
                                                           nport);
+                                       }
                        }
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

diff --git a/drivers/media/i2c/ds90ub960.c b/drivers/media/i2c/ds90ub960.c
index 0b708c90c06b..5ce3e847d360 100644
--- a/drivers/media/i2c/ds90ub960.c
+++ b/drivers/media/i2c/ds90ub960.c
@@ -2527,9 +2527,16 @@ static int ub960_configure_ports_for_streaming(struct ub960_data *priv,
 
                                /* Map all VCs from this port to VC(nport) */
                                for (i = 0; i < 8; i++)
-                                       ub960_rxport_write(priv, nport,
+                                       if(nport==0 && i==0) {
+                                                ub960_rxport_write(priv, nport,
+                                                           UB960_RR_VC_ID_MAP(i),
+                                                          0x10); /* map VC0 to VC0 and map VC1 to VC1 */
+
+                                       } else {
+                                               ub960_rxport_write(priv, nport,
                                                           UB960_RR_VC_ID_MAP(i),
                                                           nport);
+                                       }
                        }

Thank you.

Jianzhong