camerad: update os04 blc settings (#34065)

* not 64

* capped

---------

Co-authored-by: Comma Device <device@comma.ai>

system/camerad/sensors/os04c10.cc

@@ -52,7 +52,7 @@ OS04C10::OS04C10() {
   exposure_time_max = 2352;
   analog_gain_min_idx = 0x0;
   analog_gain_rec_idx = 0x0;  // 1x
-  analog_gain_max_idx = 0x36;
+  analog_gain_max_idx = 0x28;
   analog_gain_cost_delta = -1;
   analog_gain_cost_low = 0.4;
   analog_gain_cost_high = 6.4;
@@ -63,7 +63,7 @@ OS04C10::OS04C10() {
   max_ev = exposure_time_max * dc_gain_factor * sensor_analog_gains[analog_gain_max_idx];
   target_grey_factor = 0.01;
 
-  black_level = 64;
+  black_level = 48;
   color_correct_matrix = {
     0x000000c2, 0x00000fe0, 0x00000fde,
     0x00000fa7, 0x000000d9, 0x00001000,

system/camerad/sensors/os04c10_cl.h

@@ -4,9 +4,9 @@
 
 #define BIT_DEPTH 12
 #define PV_MAX10 1023
-#define PV_MAX12 4096
+#define PV_MAX12 4095
 #define PV_MAX16 65536 // gamma curve is calibrated to 16bit
-#define BLACK_LVL 64
+#define BLACK_LVL 48
 #define VIGNETTE_RSZ 2.2545f
 
 float combine_dual_pvs(float lv, float sv, int expo_time) {

system/camerad/sensors/os04c10_registers.h

@@ -291,7 +291,7 @@ const struct i2c_random_wr_payload init_array_os04c10[] = {
   {0x3cae, 0x00},
   {0x4000, 0xf3},
   {0x4001, 0x60},
-  {0x4003, 0x80},
+  {0x4003, 0x40},
   {0x4300, 0xff},
   {0x4302, 0x0f},
   {0x4305, 0x83},