load_goke: opt-in sensor_dvp / sensor_mclk gate for DVP-wired boards

general/package/goke-osdrv-gk7205v200/files/script/load_goke

@@ -21,6 +21,28 @@ os_mem_size=${os_mem_size:=32}
 BOARD=demo
 YUV_TYPE0=0 # 0 -- raw, 1 --DC, 2 --bt1120, 3 --bt656
 
+# DVP-wired sensor boards -- OPT-IN, set by the device profile.
+#
+# open_sys_config selects MIPI or DVP pad routing from its chip= and
+# g_cmos_yuv_flag= arguments. A board that wires the sensor to the DVP pads
+# needs the DVP path; with the MIPI arguments the i2c controller is muxed to
+# pads that are not connected to the sensor, so every address NACKs and no
+# sensor is ever detected.
+#
+# Keyed off an env var rather than the SoC name on purpose: both wirings exist
+# on gk7202v300, so testing $CHIP_TYPE here would fix DVP boards by breaking
+# every MIPI one. Profiles opt in with `fw_setenv sensor_dvp 1`.
+# SYSCFG_CHIP is the value handed to open_sys_config's chip= selector, which is
+# NOT the same thing as CHIP_TYPE (the detected SoC). They coincide by default;
+# a DVP board needs the gk7205v200 pad-routing tables while still BEING a
+# gk7202v300. Keeping them separate leaves CHIP_TYPE meaning exactly one thing,
+# so existing and future chip-specific branches are unaffected by this opt-in.
+SYSCFG_CHIP=$CHIP_TYPE
+if [ "$(fw_printenv -n sensor_dvp 2>/dev/null)" = "1" ]; then
+	SYSCFG_CHIP=gk7205v200
+	YUV_TYPE0=1
+fi
+
 cd /lib/modules/$(uname -r)/goke/
 
 ##################################################################
@@ -91,7 +113,7 @@ insert_osal() {
 }
 
 insert_detect() {
-	modprobe open_sys_config chip=$CHIP_TYPE sensors=unknown g_cmos_yuv_flag=$YUV_TYPE0 board=$BOARD
+	modprobe open_sys_config chip=$SYSCFG_CHIP sensors=unknown g_cmos_yuv_flag=$YUV_TYPE0 board=$BOARD
 	insert_osal
 	insmod gk7205v200_base.ko
 	modprobe open_isp
@@ -164,7 +186,23 @@ insert_ko() {
 	if [ "$SENSOR" == "bt656" ] || [ "$SENSOR" == "jxf23_dc" ]; then
 		YUV_TYPE0=1
 	fi
-	modprobe open_sys_config chip=$CHIP_TYPE sensors=$SENSOR g_cmos_yuv_flag=$YUV_TYPE0 board=$BOARD
+	modprobe open_sys_config chip=$SYSCFG_CHIP sensors=$SENSOR g_cmos_yuv_flag=$YUV_TYPE0 board=$BOARD
+	# open_sys_config takes MCLK only from its module parameters and defaults to
+	# 27 MHz at this chip=. A sensor init table tuned for 24 MHz (the GC2053
+	# ForCar tables are) then runs against the wrong clock. The ini's MCLK key is
+	# not consulted on this path, so the register is written directly.
+	# A wrong MCLK does not fail loudly — it produces a corrupted or absent
+	# image while every log line still looks healthy. So say something when the
+	# override cannot be applied, rather than continuing silently misconfigured.
+	case "$(fw_printenv -n sensor_mclk 2>/dev/null)" in
+		24)
+			if ! command -v devmem >/dev/null 2>&1; then
+				logger -p daemon.err -t load_goke "sensor_mclk=24 requested but devmem is missing; MCLK left at the chip default"
+			elif ! devmem 0x120100F0 32 0x0000000D; then
+				logger -p daemon.err -t load_goke "sensor_mclk=24: MCLK register write failed; sensor may not produce a usable image"
+			fi
+			;;
+	esac
 	insert_osal
 	insmod gk7205v200_base.ko
 	insmod gk7205v200_sys.ko