[media] media: ov5642: Add support for arbitrary resolution
This patch adds the ability to get arbitrary resolutions with a width up to 2592 and a height up to 720 pixels instead of the standard 1280x720 only. Signed-off-by: Bastian Hecht <hechtb@gmail.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Bastian Hecht
Mauro Carvalho Chehab
parent
95d20109ad
commit
171f1a48bb
1 changed files with 167 additions and 73 deletions
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@ -14,8 +14,10 @@
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* published by the Free Software Foundation.
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*/
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#include <linux/bitops.h>
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#include <linux/delay.h>
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#include <linux/i2c.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/videodev2.h>
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#include <linux/module.h>
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@ -35,7 +37,7 @@
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#define REG_WINDOW_START_Y_LOW 0x3803
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#define REG_WINDOW_WIDTH_HIGH 0x3804
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#define REG_WINDOW_WIDTH_LOW 0x3805
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#define REG_WINDOW_HEIGHT_HIGH 0x3806
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#define REG_WINDOW_HEIGHT_HIGH 0x3806
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#define REG_WINDOW_HEIGHT_LOW 0x3807
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#define REG_OUT_WIDTH_HIGH 0x3808
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#define REG_OUT_WIDTH_LOW 0x3809
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@ -45,20 +47,45 @@
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#define REG_OUT_TOTAL_WIDTH_LOW 0x380d
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#define REG_OUT_TOTAL_HEIGHT_HIGH 0x380e
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#define REG_OUT_TOTAL_HEIGHT_LOW 0x380f
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#define REG_OUTPUT_FORMAT 0x4300
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#define REG_ISP_CTRL_01 0x5001
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#define REG_AVG_WINDOW_END_X_HIGH 0x5682
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#define REG_AVG_WINDOW_END_X_LOW 0x5683
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#define REG_AVG_WINDOW_END_Y_HIGH 0x5686
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#define REG_AVG_WINDOW_END_Y_LOW 0x5687
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/*
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* define standard resolution.
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* Works currently only for up to 720 lines
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* eg. 320x240, 640x480, 800x600, 1280x720, 2048x720
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*/
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#define OV5642_WIDTH 1280
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#define OV5642_HEIGHT 720
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#define OV5642_TOTAL_WIDTH 3200
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#define OV5642_TOTAL_HEIGHT 2000
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/* active pixel array size */
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#define OV5642_SENSOR_SIZE_X 2592
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#define OV5642_SENSOR_SIZE_Y 1944
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/*
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* About OV5642 resolution, cropping and binning:
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* This sensor supports it all, at least in the feature description.
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* Unfortunately, no combination of appropriate registers settings could make
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* the chip work the intended way. As it works with predefined register lists,
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* some undocumented registers are presumably changed there to achieve their
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* goals.
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* This driver currently only works for resolutions up to 720 lines with a
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* 1:1 scale. Hopefully these restrictions will be removed in the future.
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*/
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#define OV5642_MAX_WIDTH OV5642_SENSOR_SIZE_X
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#define OV5642_MAX_HEIGHT 720
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/* default sizes */
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#define OV5642_DEFAULT_WIDTH 1280
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#define OV5642_DEFAULT_HEIGHT OV5642_MAX_HEIGHT
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/* minimum extra blanking */
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#define BLANKING_EXTRA_WIDTH 500
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#define BLANKING_EXTRA_HEIGHT 20
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/*
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* the sensor's autoexposure is buggy when setting total_height low.
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* It tries to expose longer than 1 frame period without taking care of it
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* and this leads to weird output. So we set 1000 lines as minimum.
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*/
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#define BLANKING_MIN_HEIGHT 1000
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struct regval_list {
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u16 reg_num;
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u8 value;
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@ -582,6 +609,11 @@ struct ov5642_datafmt {
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struct ov5642 {
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struct v4l2_subdev subdev;
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const struct ov5642_datafmt *fmt;
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struct v4l2_rect crop_rect;
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/* blanking information */
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int total_width;
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int total_height;
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};
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static const struct ov5642_datafmt ov5642_colour_fmts[] = {
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@ -642,6 +674,21 @@ static int reg_write(struct i2c_client *client, u16 reg, u8 val)
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return 0;
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}
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/*
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* convenience function to write 16 bit register values that are split up
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* into two consecutive high and low parts
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*/
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static int reg_write16(struct i2c_client *client, u16 reg, u16 val16)
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{
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int ret;
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ret = reg_write(client, reg, val16 >> 8);
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if (ret)
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return ret;
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return reg_write(client, reg + 1, val16 & 0x00ff);
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}
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#ifdef CONFIG_VIDEO_ADV_DEBUG
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static int ov5642_get_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
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{
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@ -685,58 +732,55 @@ static int ov5642_write_array(struct i2c_client *client,
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return 0;
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}
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static int ov5642_set_resolution(struct i2c_client *client)
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static int ov5642_set_resolution(struct v4l2_subdev *sd)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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struct ov5642 *priv = to_ov5642(client);
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int width = priv->crop_rect.width;
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int height = priv->crop_rect.height;
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int total_width = priv->total_width;
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int total_height = priv->total_height;
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int start_x = (OV5642_SENSOR_SIZE_X - width) / 2;
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int start_y = (OV5642_SENSOR_SIZE_Y - height) / 2;
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int ret;
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u8 start_x_high = ((OV5642_SENSOR_SIZE_X - OV5642_WIDTH) / 2) >> 8;
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u8 start_x_low = ((OV5642_SENSOR_SIZE_X - OV5642_WIDTH) / 2) & 0xff;
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u8 start_y_high = ((OV5642_SENSOR_SIZE_Y - OV5642_HEIGHT) / 2) >> 8;
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u8 start_y_low = ((OV5642_SENSOR_SIZE_Y - OV5642_HEIGHT) / 2) & 0xff;
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u8 width_high = OV5642_WIDTH >> 8;
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u8 width_low = OV5642_WIDTH & 0xff;
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u8 height_high = OV5642_HEIGHT >> 8;
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u8 height_low = OV5642_HEIGHT & 0xff;
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u8 total_width_high = OV5642_TOTAL_WIDTH >> 8;
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u8 total_width_low = OV5642_TOTAL_WIDTH & 0xff;
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u8 total_height_high = OV5642_TOTAL_HEIGHT >> 8;
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u8 total_height_low = OV5642_TOTAL_HEIGHT & 0xff;
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ret = reg_write(client, REG_WINDOW_START_X_HIGH, start_x_high);
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/*
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* This should set the starting point for cropping.
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* Doesn't work so far.
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*/
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ret = reg_write16(client, REG_WINDOW_START_X_HIGH, start_x);
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if (!ret)
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ret = reg_write(client, REG_WINDOW_START_X_LOW, start_x_low);
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if (!ret)
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ret = reg_write(client, REG_WINDOW_START_Y_HIGH, start_y_high);
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if (!ret)
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ret = reg_write(client, REG_WINDOW_START_Y_LOW, start_y_low);
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ret = reg_write16(client, REG_WINDOW_START_Y_HIGH, start_y);
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if (!ret) {
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priv->crop_rect.left = start_x;
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priv->crop_rect.top = start_y;
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}
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if (!ret)
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ret = reg_write(client, REG_WINDOW_WIDTH_HIGH, width_high);
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ret = reg_write16(client, REG_WINDOW_WIDTH_HIGH, width);
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if (!ret)
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ret = reg_write(client, REG_WINDOW_WIDTH_LOW , width_low);
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if (!ret)
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ret = reg_write(client, REG_WINDOW_HEIGHT_HIGH, height_high);
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if (!ret)
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ret = reg_write(client, REG_WINDOW_HEIGHT_LOW, height_low);
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ret = reg_write16(client, REG_WINDOW_HEIGHT_HIGH, height);
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if (ret)
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return ret;
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priv->crop_rect.width = width;
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priv->crop_rect.height = height;
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/* Set the output window size. Only 1:1 scale is supported so far. */
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ret = reg_write16(client, REG_OUT_WIDTH_HIGH, width);
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if (!ret)
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ret = reg_write(client, REG_OUT_WIDTH_HIGH, width_high);
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if (!ret)
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ret = reg_write(client, REG_OUT_WIDTH_LOW , width_low);
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if (!ret)
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ret = reg_write(client, REG_OUT_HEIGHT_HIGH, height_high);
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if (!ret)
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ret = reg_write(client, REG_OUT_HEIGHT_LOW, height_low);
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ret = reg_write16(client, REG_OUT_HEIGHT_HIGH, height);
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/* Total width = output size + blanking */
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if (!ret)
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ret = reg_write(client, REG_OUT_TOTAL_WIDTH_HIGH, total_width_high);
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ret = reg_write16(client, REG_OUT_TOTAL_WIDTH_HIGH, total_width);
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if (!ret)
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ret = reg_write(client, REG_OUT_TOTAL_WIDTH_LOW, total_width_low);
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ret = reg_write16(client, REG_OUT_TOTAL_HEIGHT_HIGH, total_height);
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/* Sets the window for AWB calculations */
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if (!ret)
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ret = reg_write(client, REG_OUT_TOTAL_HEIGHT_HIGH, total_height_high);
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ret = reg_write16(client, REG_AVG_WINDOW_END_X_HIGH, width);
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if (!ret)
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ret = reg_write(client, REG_OUT_TOTAL_HEIGHT_LOW, total_height_low);
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ret = reg_write16(client, REG_AVG_WINDOW_END_Y_HIGH, height);
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return ret;
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}
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@ -744,18 +788,18 @@ static int ov5642_set_resolution(struct i2c_client *client)
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static int ov5642_try_fmt(struct v4l2_subdev *sd,
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struct v4l2_mbus_framefmt *mf)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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struct ov5642 *priv = to_ov5642(client);
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const struct ov5642_datafmt *fmt = ov5642_find_datafmt(mf->code);
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dev_dbg(sd->v4l2_dev->dev, "%s(%u) width: %u heigth: %u\n",
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__func__, mf->code, mf->width, mf->height);
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mf->width = priv->crop_rect.width;
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mf->height = priv->crop_rect.height;
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if (!fmt) {
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mf->code = ov5642_colour_fmts[0].code;
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mf->colorspace = ov5642_colour_fmts[0].colorspace;
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}
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mf->width = OV5642_WIDTH;
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mf->height = OV5642_HEIGHT;
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mf->field = V4L2_FIELD_NONE;
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return 0;
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@ -767,20 +811,13 @@ static int ov5642_s_fmt(struct v4l2_subdev *sd,
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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struct ov5642 *priv = to_ov5642(client);
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dev_dbg(sd->v4l2_dev->dev, "%s(%u)\n", __func__, mf->code);
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/* MIPI CSI could have changed the format, double-check */
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if (!ov5642_find_datafmt(mf->code))
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return -EINVAL;
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ov5642_try_fmt(sd, mf);
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priv->fmt = ov5642_find_datafmt(mf->code);
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ov5642_write_array(client, ov5642_default_regs_init);
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ov5642_set_resolution(client);
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ov5642_write_array(client, ov5642_default_regs_finalise);
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return 0;
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}
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@ -794,8 +831,8 @@ static int ov5642_g_fmt(struct v4l2_subdev *sd,
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mf->code = fmt->code;
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mf->colorspace = fmt->colorspace;
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mf->width = OV5642_WIDTH;
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mf->height = OV5642_HEIGHT;
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mf->width = priv->crop_rect.width;
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mf->height = priv->crop_rect.height;
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mf->field = V4L2_FIELD_NONE;
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return 0;
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@ -828,15 +865,44 @@ static int ov5642_g_chip_ident(struct v4l2_subdev *sd,
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return 0;
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}
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static int ov5642_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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struct ov5642 *priv = to_ov5642(client);
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struct v4l2_rect *rect = &a->c;
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int ret;
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v4l_bound_align_image(&rect->width, 48, OV5642_MAX_WIDTH, 1,
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&rect->height, 32, OV5642_MAX_HEIGHT, 1, 0);
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priv->crop_rect.width = rect->width;
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priv->crop_rect.height = rect->height;
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priv->total_width = rect->width + BLANKING_EXTRA_WIDTH;
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priv->total_height = max_t(int, rect->height +
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BLANKING_EXTRA_HEIGHT,
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BLANKING_MIN_HEIGHT);
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priv->crop_rect.width = rect->width;
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priv->crop_rect.height = rect->height;
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ret = ov5642_write_array(client, ov5642_default_regs_init);
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if (!ret)
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ret = ov5642_set_resolution(sd);
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if (!ret)
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ret = ov5642_write_array(client, ov5642_default_regs_finalise);
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return ret;
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}
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static int ov5642_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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struct ov5642 *priv = to_ov5642(client);
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struct v4l2_rect *rect = &a->c;
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a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
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rect->top = 0;
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rect->left = 0;
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rect->width = OV5642_WIDTH;
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rect->height = OV5642_HEIGHT;
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if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
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return -EINVAL;
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*rect = priv->crop_rect;
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return 0;
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}
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@ -845,8 +911,8 @@ static int ov5642_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
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{
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a->bounds.left = 0;
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a->bounds.top = 0;
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a->bounds.width = OV5642_WIDTH;
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a->bounds.height = OV5642_HEIGHT;
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a->bounds.width = OV5642_MAX_WIDTH;
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a->bounds.height = OV5642_MAX_HEIGHT;
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a->defrect = a->bounds;
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a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
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a->pixelaspect.numerator = 1;
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@ -859,24 +925,43 @@ static int ov5642_g_mbus_config(struct v4l2_subdev *sd,
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struct v4l2_mbus_config *cfg)
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{
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cfg->type = V4L2_MBUS_CSI2;
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cfg->flags = V4L2_MBUS_CSI2_2_LANE |
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V4L2_MBUS_CSI2_CHANNEL_0 |
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V4L2_MBUS_CSI2_CONTINUOUS_CLOCK;
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cfg->flags = V4L2_MBUS_CSI2_2_LANE | V4L2_MBUS_CSI2_CHANNEL_0 |
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V4L2_MBUS_CSI2_CONTINUOUS_CLOCK;
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return 0;
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}
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static int ov5642_s_power(struct v4l2_subdev *sd, int on)
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{
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struct i2c_client *client;
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int ret;
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if (!on)
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return 0;
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client = v4l2_get_subdevdata(sd);
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ret = ov5642_write_array(client, ov5642_default_regs_init);
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if (!ret)
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ret = ov5642_set_resolution(sd);
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if (!ret)
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ret = ov5642_write_array(client, ov5642_default_regs_finalise);
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return ret;
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}
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static struct v4l2_subdev_video_ops ov5642_subdev_video_ops = {
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.s_mbus_fmt = ov5642_s_fmt,
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.g_mbus_fmt = ov5642_g_fmt,
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.try_mbus_fmt = ov5642_try_fmt,
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.enum_mbus_fmt = ov5642_enum_fmt,
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.s_crop = ov5642_s_crop,
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.g_crop = ov5642_g_crop,
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.cropcap = ov5642_cropcap,
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.g_mbus_config = ov5642_g_mbus_config,
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};
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static struct v4l2_subdev_core_ops ov5642_subdev_core_ops = {
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.s_power = ov5642_s_power,
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.g_chip_ident = ov5642_g_chip_ident,
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#ifdef CONFIG_VIDEO_ADV_DEBUG
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.g_register = ov5642_get_register,
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@ -934,7 +1019,16 @@ static int ov5642_probe(struct i2c_client *client,
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v4l2_i2c_subdev_init(&priv->subdev, client, &ov5642_subdev_ops);
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priv->fmt = &ov5642_colour_fmts[0];
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priv->fmt = &ov5642_colour_fmts[0];
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priv->crop_rect.width = OV5642_DEFAULT_WIDTH;
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priv->crop_rect.height = OV5642_DEFAULT_HEIGHT;
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priv->crop_rect.left = (OV5642_MAX_WIDTH - OV5642_DEFAULT_WIDTH) / 2;
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priv->crop_rect.top = (OV5642_MAX_HEIGHT - OV5642_DEFAULT_HEIGHT) / 2;
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priv->crop_rect.width = OV5642_DEFAULT_WIDTH;
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priv->crop_rect.height = OV5642_DEFAULT_HEIGHT;
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priv->total_width = OV5642_DEFAULT_WIDTH + BLANKING_EXTRA_WIDTH;
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priv->total_height = BLANKING_MIN_HEIGHT;
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ret = ov5642_video_probe(client);
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if (ret < 0)
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