diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/i2c/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/media/i2c/ov7670.c | 98 |
2 files changed, 85 insertions, 14 deletions
diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig index 26549f765536..ef2e1dea253b 100644 --- a/drivers/media/i2c/Kconfig +++ b/drivers/media/i2c/Kconfig @@ -692,6 +692,7 @@ config VIDEO_OV7670 tristate "OmniVision OV7670 sensor support" depends on I2C && VIDEO_V4L2 depends on MEDIA_CAMERA_SUPPORT + select V4L2_FWNODE ---help--- This is a Video4Linux2 sensor-level driver for the OmniVision OV7670 VGA camera. It currently only works with the M88ALP01 diff --git a/drivers/media/i2c/ov7670.c b/drivers/media/i2c/ov7670.c index 31b0c33cfc5b..3474ef832c1e 100644 --- a/drivers/media/i2c/ov7670.c +++ b/drivers/media/i2c/ov7670.c @@ -21,6 +21,7 @@ #include <linux/gpio/consumer.h> #include <media/v4l2-device.h> #include <media/v4l2-ctrls.h> +#include <media/v4l2-fwnode.h> #include <media/v4l2-mediabus.h> #include <media/v4l2-image-sizes.h> #include <media/i2c/ov7670.h> @@ -242,6 +243,7 @@ struct ov7670_info { struct clk *clk; struct gpio_desc *resetb_gpio; struct gpio_desc *pwdn_gpio; + unsigned int mbus_config; /* Media bus configuration flags */ int min_width; /* Filter out smaller sizes */ int min_height; /* Filter out smaller sizes */ int clock_speed; /* External clock speed (MHz) */ @@ -1014,7 +1016,7 @@ static int ov7670_set_fmt(struct v4l2_subdev *sd, #ifdef CONFIG_VIDEO_V4L2_SUBDEV_API struct v4l2_mbus_framefmt *mbus_fmt; #endif - unsigned char com7; + unsigned char com7, com10 = 0; int ret; if (format->pad) @@ -1034,7 +1036,6 @@ static int ov7670_set_fmt(struct v4l2_subdev *sd, } ret = ov7670_try_fmt_internal(sd, &format->format, &ovfmt, &wsize); - if (ret) return ret; /* @@ -1045,16 +1046,41 @@ static int ov7670_set_fmt(struct v4l2_subdev *sd, */ com7 = ovfmt->regs[0].value; com7 |= wsize->com7_bit; - ov7670_write(sd, REG_COM7, com7); + ret = ov7670_write(sd, REG_COM7, com7); + if (ret) + return ret; + + /* + * Configure the media bus through COM10 register + */ + if (info->mbus_config & V4L2_MBUS_VSYNC_ACTIVE_LOW) + com10 |= COM10_VS_NEG; + if (info->mbus_config & V4L2_MBUS_HSYNC_ACTIVE_LOW) + com10 |= COM10_HREF_REV; + if (info->pclk_hb_disable) + com10 |= COM10_PCLK_HB; + ret = ov7670_write(sd, REG_COM10, com10); + if (ret) + return ret; + /* * Now write the rest of the array. Also store start/stops */ - ov7670_write_array(sd, ovfmt->regs + 1); - ov7670_set_hw(sd, wsize->hstart, wsize->hstop, wsize->vstart, - wsize->vstop); - ret = 0; - if (wsize->regs) + ret = ov7670_write_array(sd, ovfmt->regs + 1); + if (ret) + return ret; + + ret = ov7670_set_hw(sd, wsize->hstart, wsize->hstop, wsize->vstart, + wsize->vstop); + if (ret) + return ret; + + if (wsize->regs) { ret = ov7670_write_array(sd, wsize->regs); + if (ret) + return ret; + } + info->fmt = ovfmt; /* @@ -1067,8 +1093,10 @@ static int ov7670_set_fmt(struct v4l2_subdev *sd, * to write it unconditionally, and that will make the frame * rate persistent too. */ - if (ret == 0) - ret = ov7670_write(sd, REG_CLKRC, info->clkrc); + ret = ov7670_write(sd, REG_CLKRC, info->clkrc); + if (ret) + return ret; + return 0; } @@ -1692,6 +1720,45 @@ static int ov7670_init_gpio(struct i2c_client *client, struct ov7670_info *info) return 0; } +/* + * ov7670_parse_dt() - Parse device tree to collect mbus configuration + * properties + */ +static int ov7670_parse_dt(struct device *dev, + struct ov7670_info *info) +{ + struct fwnode_handle *fwnode = dev_fwnode(dev); + struct v4l2_fwnode_endpoint bus_cfg; + struct fwnode_handle *ep; + int ret; + + if (!fwnode) + return -EINVAL; + + info->pclk_hb_disable = false; + if (fwnode_property_present(fwnode, "ov7670,pclk-hb-disable")) + info->pclk_hb_disable = true; + + ep = fwnode_graph_get_next_endpoint(fwnode, NULL); + if (!ep) + return -EINVAL; + + ret = v4l2_fwnode_endpoint_parse(ep, &bus_cfg); + if (ret) { + fwnode_handle_put(ep); + return ret; + } + + if (bus_cfg.bus_type != V4L2_MBUS_PARALLEL) { + dev_err(dev, "Unsupported media bus type\n"); + fwnode_handle_put(ep); + return ret; + } + info->mbus_config = bus_cfg.bus.parallel.flags; + + return 0; +} + static int ov7670_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -1712,7 +1779,13 @@ static int ov7670_probe(struct i2c_client *client, #endif info->clock_speed = 30; /* default: a guess */ - if (client->dev.platform_data) { + + if (dev_fwnode(&client->dev)) { + ret = ov7670_parse_dt(&client->dev, info); + if (ret) + return ret; + + } else if (client->dev.platform_data) { struct ov7670_config *config = client->dev.platform_data; /* @@ -1779,9 +1852,6 @@ static int ov7670_probe(struct i2c_client *client, tpf.denominator = 30; info->devtype->set_framerate(sd, &tpf); - if (info->pclk_hb_disable) - ov7670_write(sd, REG_COM10, COM10_PCLK_HB); - v4l2_ctrl_handler_init(&info->hdl, 10); v4l2_ctrl_new_std(&info->hdl, &ov7670_ctrl_ops, V4L2_CID_BRIGHTNESS, 0, 255, 1, 128); |