hardware/nvidia-spiri/platform/t18x/common/kernel-dts/t18x-common-platforms/tegra186-tx2-spiri-camera.dtsi

@@ -189,7 +189,7 @@ i2c8 = "/i2c@31e0000";
         framerate_factor = "1000000";
         exposure_factor = "1000000";
         min_gain_val = "102";
-        max_gain_val = "160" ;
+        max_gain_val = "160" ; //"762";
         step_gain_val = "1";
         default_gain = "102";
 				min_hdr_ratio = "1";

kernel/nvidia-spiri/drivers/media/i2c/mt9m021.c

@@ -417,15 +417,16 @@ static int mt9m021_set_gain(struct tegracam_device *tc_dev, s64 val)
    * Digital gain equation:
    *
    *  RANGE: 1x, 7.97x
+   *  GAIN: VAL / STEPS;
    *  STEPS: 1/32
    *
-   *  SCALE FACTOR = 3
+   *  SCALE FACTOR = 32
    *
-   *  min_gain_val = 102
+   *  min_gain_val = 100
-   *  max_gain_val = 160
+   *  max_gain_val = 762
    *  gain_factor = 3
    *
-   *  gain accepts mapping to range 32 - 53
+   *  gain maps to range 32 - 255
    */
   gain = val / 3;
 
@@ -444,6 +445,7 @@ static int mt9m021_set_gain(struct tegracam_device *tc_dev, s64 val)
 	/* Update global gain */
 	err =
       mt9m021_write_reg16(s_data, MT9M021_GLOBAL_GAIN, gain);
+//  msleep(10);
 	if (err)
 		goto exit;
 	err =
@@ -451,6 +453,8 @@ static int mt9m021_set_gain(struct tegracam_device *tc_dev, s64 val)
 	if (err)
 		goto exit;
 
+//  usleep_range(1000, 1500);
+
 	return 0;
 
 exit:
@@ -517,6 +521,7 @@ static int mt9m021_set_coarse_time(struct mt9m021 *priv, s64 val)
 	err = mt9m021_write_reg16(s_data, MT9M021_COARSE_INT_TIME_CB, val);
 	if (err)
 		return err;
+//msleep(30);
 
 	return 0;
 }
@@ -567,6 +572,7 @@ static int mt9m021_set_analog_gain(struct tegracam_device *tc_dev, s64 val)
 	    ((val << MT9M021_ANALOG_GAIN_SHIFT) &
 	     MT9M021_ANALOG_GAIN_MASK);
 	err = mt9m021_write_reg16(s_data, MT9M021_DIGITAL_TEST, reg16);
+//	msleep(30);
 	if (err)
 		goto exit;
 
@@ -622,6 +628,7 @@ static int mt9m021_set_digital_gain(struct tegracam_device *tc_dev, s64 val,
 	err = mt9m021_write_reg16(s_data, gain_cb_reg, val);
 	if (err)
 		goto exit;
+//	msleep(30);
 
 	return 0;
 
@@ -644,6 +651,7 @@ static int mt9m021_set_test_pattern(struct tegracam_device *tc_dev, s32 val)
 	else
 		err = mt9m021_write_reg16(s_data, MT9M021_TEST_PATTERN,
 					  val);
+//	msleep(30);
 	if (err)
 		goto exit;
 
@@ -956,10 +964,15 @@ static int mt9m021_col_correction(struct mt9m021 *priv)
 	if (ret < 0)
 		return ret;
 
+//	msleep(200);
+//  usleep(200);
+
 	/* Enable Streaming */
 	ret = mt9m021_write_table(priv, mode_table[MT9M021_MODE_START_STREAM]);
 	if (ret < 0)
 		return ret;
+//	msleep(200);
+//  usleep(200);
 
 	/* Disable Streaming */
 	ret = mt9m021_write_table(priv, mode_table[MT9M021_MODE_STOP_STREAM]);
@@ -970,6 +983,8 @@ static int mt9m021_col_correction(struct mt9m021 *priv)
 	ret = mt9m021_write_reg16(s_data, MT9M021_COLUMN_CORRECTION, 0xE007);
 	if (ret < 0)
 		return ret;
+//  msleep(200);
+//  usleep(200);
 
 	return ret;
 }