Camera board • Re: IMX219 4-Lane

I checked the PLL setting in the 4 lane driver and the link frequency is set to 360MHz.
Sorry for my misunderstanding.

0x0301VTPXCK_DIV0x05
0x0303VTSYCK_DIV0x01
0x0304PREPLLCK_VT_DIV[3:0]0x03
0x0305PREPLLCK_OP_DIV[3:0]0x03
0x0306PLL_VT_MPY[10:8]0x00
0x0307PLL_VT_MPY[7:0]0x57
0x0309OPPXCK_DIV[4:0]0x0A
0x030BOPSYCK_DIV0x01
0x030CPLL_OP_MPY[10:8]0x00
0x030DPLL_OP_MPY[7:0]0x5A

INCK 24MHz / PLL_OP_DIV 3 * PLL_OP_MPY 90(0x5A) / 2 (DDR) = 360MHz

For mainline we really want to follow the manufacturer's datasheets as closely as possible, so that would mean matching the max data rate for 4 lane mode.

For 2 lane mode, link frequency 456MHz, PLL should be as below.

0x0301VTPXCK_DIV0x05
0x0303VTSYCK_DIV0x01
0x0304PREPLLCK_VT_DIV[3:0]0x03
0x0305PREPLLCK_OP_DIV[3:0]0x03
0x0306PLL_VT_MPY[10:8]0x00
0x0307PLL_VT_MPY[7:0]0x39
0x0309OPPXCK_DIV[4:0]0x0A
0x030BOPSYCK_DIV0x01
0x030CPLL_OP_MPY[10:8]0x00
0x030DPLL_OP_MPY[7:0]0x72

Need to switch the parameter accordingly.

Statistics: Posted by sohonomura2020 — Mon Jan 06, 2025 12:42 am

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