Part Number: AM62P
Hi,
The following error frequently occurs after the device boots up:
[ 19.074376] cdns-mipi-dphy-rx 30110000.phy: DPHY wait for lane ready timeout
[ 19.082056] cdns-csi2rx 30101000.csi-bridge: Failed to configure external DPHY: -110
[ 19.082056] cdns-csi2rx 30101000.csi-bridge: Failed to configure external DPHY: -110
After checking the kernel driver, I found that the error is reported by
cdns-dphy-rx.c, as shown below. What does this register mean, and what could be the reason for the frequent -110 return value in cdns_dphy_rx_wait_for_bit(reg + DPHY_ISO_CL_CTRL_L, DPHY_ISO_LANE_READY_BIT);?static int cdns_dphy_rx_wait_lane_ready(struct cdns_dphy_rx *dphy, unsigned int lanes)
131 {
132 static const u32 data_lane_ctrl[] = {DPHY_ISO_DL_CTRL_L0,
133 DPHY_ISO_DL_CTRL_L1,
134 DPHY_ISO_DL_CTRL_L2,
135 DPHY_ISO_DL_CTRL_L3};
136 void __iomem *reg = dphy->regs;
137 unsigned int i;
138 int ret;
139
140 /* Clock lane */
141 ret = cdns_dphy_rx_wait_for_bit(reg + DPHY_ISO_CL_CTRL_L,
142 DPHY_ISO_LANE_READY_BIT);
143 if (ret) {
144 return ret;
145 }
146
147 for (i = 0; i < lanes; i++) {
148 ret = cdns_dphy_rx_wait_for_bit(reg + data_lane_ctrl[i],
149 DPHY_ISO_LANE_READY_BIT);
150 if (ret)
151 return ret;
152 }
153
154 return 0;
155 }
132 static const u32 data_lane_ctrl[] = {DPHY_ISO_DL_CTRL_L0,
133 DPHY_ISO_DL_CTRL_L1,
134 DPHY_ISO_DL_CTRL_L2,
135 DPHY_ISO_DL_CTRL_L3};
136 void __iomem *reg = dphy->regs;
137 unsigned int i;
138 int ret;
139
140 /* Clock lane */
141 ret = cdns_dphy_rx_wait_for_bit(reg + DPHY_ISO_CL_CTRL_L,
142 DPHY_ISO_LANE_READY_BIT);
143 if (ret) {
144 return ret;
145 }
146
147 for (i = 0; i < lanes; i++) {
148 ret = cdns_dphy_rx_wait_for_bit(reg + data_lane_ctrl[i],
149 DPHY_ISO_LANE_READY_BIT);
150 if (ret)
151 return ret;
152 }
153
154 return 0;
155 }
