[iMX8MPlus] How to dump MIPI-CSI2 registers ?

khang_letruong — Tue, 13 Sep 2022 08:04:34 GMT

Dear Community,

In drivers/staging/media/imx/imx8-mipi-csi2-sam.c, I would like to have below function to show MIPI-CSI2 related registers during streaming :

static void dump_csis_regs(struct csi_state *state, const char *label) { struct { u32 offset; const char * const name; } registers[] = { { 0x00, "CSIS_VERSION" }, { 0x04, "CSIS_CMN_CTRL" }, { 0x08, "CSIS_CLK_CTRL" }, { 0x10, "CSIS_INTMSK" }, { 0x14, "CSIS_INTSRC" }, { 0x20, "CSIS_DPHYSTATUS" }, { 0x24, "CSIS_DPHYCTRL" }, { 0x30, "CSIS_DPHYBCTRL_L" }, { 0x34, "CSIS_DPHYBCTRL_H" }, { 0x38, "CSIS_DPHYSCTRL_L" }, { 0x3C, "CSIS_DPHYSCTRL_H" }, { 0x40, "CSIS_ISPCONFIG_CH0" }, { 0x50, "CSIS_ISPCONFIG_CH1" }, { 0x60, "CSIS_ISPCONFIG_CH2" }, { 0x70, "CSIS_ISPCONFIG_CH3" }, { 0x44, "CSIS_ISPRESOL_CH0" }, { 0x54, "CSIS_ISPRESOL_CH1" }, { 0x64, "CSIS_ISPRESOL_CH2" }, { 0x74, "CSIS_ISPRESOL_CH3" }, { 0x48, "CSIS_ISPSYNC_CH0" }, { 0x58, "CSIS_ISPSYNC_CH1" }, { 0x68, "CSIS_ISPSYNC_CH2" }, { 0x78, "CSIS_ISPSYNC_CH3" }, }; u32 i; v4l2_dbg(2, debug, &state->sd, "--- %s ---\n", label); for (i = 0; i < ARRAY_SIZE(registers); i++) { u32 cfg = mipi_csis_read(state, registers[i].offset); v4l2_dbg(2, debug, &state->sd, "%20s[%x]: 0x%.8x\n", registers[i].name, registers[i].offset, cfg); } }

For that purpose, I add mxc-mipi-csi2-sam.debug=2 to following u-Boot's environment variable :

u-boot=> setenv mmcargs "setenv bootargs ${jh_clk} console=${console} root=${mmcroot} mxc-mipi-csi2-sam.debug=2"

which becomes :

mmcargs=setenv bootargs console=ttymxc1,115200 root=/dev/mmcblk1p2 rootwait rw mxc-mipi-csi2-sam.debug=2

Then I saveenv and boot but nothing shows when streaming.

Could you point out what is missing, please ?

Thanks in advance,

Khang

Re: [iMX8MPlus] How to dump MIPI-CSI2 registers ?

khang_letruong — Wed, 14 Sep 2022 03:56:19 GMT

I found the solution here : https://community.nxp.com/t5/i-MX-Processors/isp-vvcam-Crash-at-lt-sensor-gt-ioc-qcap/m-p/1312271

topic Re: [iMX8MPlus] How to dump MIPI-CSI2 registers ? in i.MX Processors

[iMX8MPlus] How to dump MIPI-CSI2 registers ?

Re: [iMX8MPlus] How to dump MIPI-CSI2 registers ?