[PATCH v6 3/7] media: mt9m114: Factor out mt9m114_configure_pa

[Mathis Foerst <mathis.foerst@mt.com>]

The function mt9m114_configure writes the configuration registers of both,
the pixel array (pa) and the image flow processor (ifp).
This is undesirable if only the config of the pa should be changed without
affecting the ifp.

Factor out the function mt9m114_configure_pa() that just writes the
pa-configuration.

Signed-off-by: Mathis Foerst <mathis.foerst@mt.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
 drivers/media/i2c/mt9m114.c | 95 +++++++++++++++++++++----------------
 1 file changed, 53 insertions(+), 42 deletions(-)

diff --git a/drivers/media/i2c/mt9m114.c b/drivers/media/i2c/mt9m114.c
index c3ec2eb0b134..6c80c6926aef 100644
--- a/drivers/media/i2c/mt9m114.c
+++ b/drivers/media/i2c/mt9m114.c
@@ -790,41 +790,25 @@ static int mt9m114_initialize(struct mt9m114 *sensor)
 	return 0;
 }
 
-static int mt9m114_configure(struct mt9m114 *sensor,
-			     struct v4l2_subdev_state *pa_state,
-			     struct v4l2_subdev_state *ifp_state)
+static int mt9m114_configure_pa(struct mt9m114 *sensor,
+				struct v4l2_subdev_state *state)
 {
-	const struct v4l2_mbus_framefmt *pa_format;
-	const struct v4l2_rect *pa_crop;
-	const struct mt9m114_format_info *ifp_info;
-	const struct v4l2_mbus_framefmt *ifp_format;
-	const struct v4l2_rect *ifp_crop;
-	const struct v4l2_rect *ifp_compose;
+	const struct v4l2_mbus_framefmt *format;
+	const struct v4l2_rect *crop;
 	unsigned int hratio, vratio;
-	u64 output_format;
 	u64 read_mode;
-	int ret = 0;
-
-	pa_format = v4l2_subdev_state_get_format(pa_state, 0);
-	pa_crop = v4l2_subdev_state_get_crop(pa_state, 0);
+	int ret;
 
-	ifp_format = v4l2_subdev_state_get_format(ifp_state, 1);
-	ifp_info = mt9m114_format_info(sensor, 1, ifp_format->code);
-	ifp_crop = v4l2_subdev_state_get_crop(ifp_state, 0);
-	ifp_compose = v4l2_subdev_state_get_compose(ifp_state, 0);
+	format = v4l2_subdev_state_get_format(state, 0);
+	crop = v4l2_subdev_state_get_crop(state, 0);
 
 	ret = cci_read(sensor->regmap, MT9M114_CAM_SENSOR_CONTROL_READ_MODE,
 		       &read_mode, NULL);
 	if (ret < 0)
 		return ret;
 
-	ret = cci_read(sensor->regmap, MT9M114_CAM_OUTPUT_FORMAT,
-		       &output_format, NULL);
-	if (ret < 0)
-		return ret;
-
-	hratio = pa_crop->width / pa_format->width;
-	vratio = pa_crop->height / pa_format->height;
+	hratio = crop->width / format->width;
+	vratio = crop->height / format->height;
 
 	/*
 	 * Pixel array crop and binning. The CAM_SENSOR_CFG_CPIPE_LAST_ROW
@@ -833,15 +817,15 @@ static int mt9m114_configure(struct mt9m114 *sensor,
 	 * example sensor modes.
 	 */
 	cci_write(sensor->regmap, MT9M114_CAM_SENSOR_CFG_X_ADDR_START,
-		  pa_crop->left, &ret);
+		  crop->left, &ret);
 	cci_write(sensor->regmap, MT9M114_CAM_SENSOR_CFG_Y_ADDR_START,
-		  pa_crop->top, &ret);
+		  crop->top, &ret);
 	cci_write(sensor->regmap, MT9M114_CAM_SENSOR_CFG_X_ADDR_END,
-		  pa_crop->width + pa_crop->left - 1, &ret);
+		  crop->width + crop->left - 1, &ret);
 	cci_write(sensor->regmap, MT9M114_CAM_SENSOR_CFG_Y_ADDR_END,
-		  pa_crop->height + pa_crop->top - 1, &ret);
+		  crop->height + crop->top - 1, &ret);
 	cci_write(sensor->regmap, MT9M114_CAM_SENSOR_CFG_CPIPE_LAST_ROW,
-		  (pa_crop->height - 4) / vratio - 1, &ret);
+		  (crop->height - 4) / vratio - 1, &ret);
 
 	read_mode &= ~(MT9M114_CAM_SENSOR_CONTROL_X_READ_OUT_MASK |
 		       MT9M114_CAM_SENSOR_CONTROL_Y_READ_OUT_MASK);
@@ -854,6 +838,29 @@ static int mt9m114_configure(struct mt9m114 *sensor,
 	cci_write(sensor->regmap, MT9M114_CAM_SENSOR_CONTROL_READ_MODE,
 		  read_mode, &ret);
 
+	return ret;
+}
+
+static int mt9m114_configure_ifp(struct mt9m114 *sensor,
+				 struct v4l2_subdev_state *state)
+{
+	const struct mt9m114_format_info *info;
+	const struct v4l2_mbus_framefmt *format;
+	const struct v4l2_rect *crop;
+	const struct v4l2_rect *compose;
+	u64 output_format;
+	int ret = 0;
+
+	format = v4l2_subdev_state_get_format(state, 1);
+	info = mt9m114_format_info(sensor, 1, format->code);
+	crop = v4l2_subdev_state_get_crop(state, 0);
+	compose = v4l2_subdev_state_get_compose(state, 0);
+
+	ret = cci_read(sensor->regmap, MT9M114_CAM_OUTPUT_FORMAT,
+		       &output_format, NULL);
+	if (ret < 0)
+		return ret;
+
 	/*
 	 * Color pipeline (IFP) cropping and scaling. Subtract 4 from the left
 	 * and top coordinates to compensate for the lines and columns removed
@@ -861,18 +868,18 @@ static int mt9m114_configure(struct mt9m114 *sensor,
 	 * not in the hardware.
 	 */
 	cci_write(sensor->regmap, MT9M114_CAM_CROP_WINDOW_XOFFSET,
-		  ifp_crop->left - 4, &ret);
+		  crop->left - 4, &ret);
 	cci_write(sensor->regmap, MT9M114_CAM_CROP_WINDOW_YOFFSET,
-		  ifp_crop->top - 4, &ret);
+		  crop->top - 4, &ret);
 	cci_write(sensor->regmap, MT9M114_CAM_CROP_WINDOW_WIDTH,
-		  ifp_crop->width, &ret);
+		  crop->width, &ret);
 	cci_write(sensor->regmap, MT9M114_CAM_CROP_WINDOW_HEIGHT,
-		  ifp_crop->height, &ret);
+		  crop->height, &ret);
 
 	cci_write(sensor->regmap, MT9M114_CAM_OUTPUT_WIDTH,
-		  ifp_compose->width, &ret);
+		  compose->width, &ret);
 	cci_write(sensor->regmap, MT9M114_CAM_OUTPUT_HEIGHT,
-		  ifp_compose->height, &ret);
+		  compose->height, &ret);
 
 	/* AWB and AE windows, use the full frame. */
 	cci_write(sensor->regmap, MT9M114_CAM_STAT_AWB_CLIP_WINDOW_XSTART,
@@ -880,18 +887,18 @@ static int mt9m114_configure(struct mt9m114 *sensor,
 	cci_write(sensor->regmap, MT9M114_CAM_STAT_AWB_CLIP_WINDOW_YSTART,
 		  0, &ret);
 	cci_write(sensor->regmap, MT9M114_CAM_STAT_AWB_CLIP_WINDOW_XEND,
-		  ifp_compose->width - 1, &ret);
+		  compose->width - 1, &ret);
 	cci_write(sensor->regmap, MT9M114_CAM_STAT_AWB_CLIP_WINDOW_YEND,
-		  ifp_compose->height - 1, &ret);
+		  compose->height - 1, &ret);
 
 	cci_write(sensor->regmap, MT9M114_CAM_STAT_AE_INITIAL_WINDOW_XSTART,
 		  0, &ret);
 	cci_write(sensor->regmap, MT9M114_CAM_STAT_AE_INITIAL_WINDOW_YSTART,
 		  0, &ret);
 	cci_write(sensor->regmap, MT9M114_CAM_STAT_AE_INITIAL_WINDOW_XEND,
-		  ifp_compose->width / 5 - 1, &ret);
+		  compose->width / 5 - 1, &ret);
 	cci_write(sensor->regmap, MT9M114_CAM_STAT_AE_INITIAL_WINDOW_YEND,
-		  ifp_compose->height / 5 - 1, &ret);
+		  compose->height / 5 - 1, &ret);
 
 	cci_write(sensor->regmap, MT9M114_CAM_CROP_CROPMODE,
 		  MT9M114_CAM_CROP_MODE_AWB_AUTO_CROP_EN |
@@ -903,7 +910,7 @@ static int mt9m114_configure(struct mt9m114 *sensor,
 			   MT9M114_CAM_OUTPUT_FORMAT_FORMAT_MASK |
 			   MT9M114_CAM_OUTPUT_FORMAT_SWAP_BYTES |
 			   MT9M114_CAM_OUTPUT_FORMAT_SWAP_RED_BLUE);
-	output_format |= ifp_info->output_format;
+	output_format |= info->output_format;
 
 	cci_write(sensor->regmap, MT9M114_CAM_OUTPUT_FORMAT,
 		  output_format, &ret);
@@ -934,7 +941,11 @@ static int mt9m114_start_streaming(struct mt9m114 *sensor,
 	if (ret)
 		return ret;
 
-	ret = mt9m114_configure(sensor, pa_state, ifp_state);
+	ret = mt9m114_configure_ifp(sensor, ifp_state);
+	if (ret)
+		goto error;
+
+	ret = mt9m114_configure_pa(sensor, pa_state);
 	if (ret)
 		goto error;
 
-- 
2.34.1