diff options
Diffstat (limited to 'drivers/media/video/ov9740.c')
| -rw-r--r-- | drivers/media/video/ov9740.c | 210 |
1 files changed, 114 insertions, 96 deletions
diff --git a/drivers/media/video/ov9740.c b/drivers/media/video/ov9740.c index 72c6ac1d767..decd70650ea 100644 --- a/drivers/media/video/ov9740.c +++ b/drivers/media/video/ov9740.c @@ -181,27 +181,8 @@ #define OV9740_MIPI_CTRL_3012 0x3012 #define OV9740_SC_CMMM_MIPI_CTR 0x3014 -/* supported resolutions */ -enum { - OV9740_VGA, - OV9740_720P, -}; - -struct ov9740_resolution { - unsigned int width; - unsigned int height; -}; - -static struct ov9740_resolution ov9740_resolutions[] = { - [OV9740_VGA] = { - .width = 640, - .height = 480, - }, - [OV9740_720P] = { - .width = 1280, - .height = 720, - }, -}; +#define OV9740_MAX_WIDTH 1280 +#define OV9740_MAX_HEIGHT 720 /* Misc. structures */ struct ov9740_reg { @@ -403,54 +384,6 @@ static const struct ov9740_reg ov9740_defaults[] = { { OV9740_ISP_CTRL19, 0x02 }, }; -static const struct ov9740_reg ov9740_regs_vga[] = { - { OV9740_X_ADDR_START_HI, 0x00 }, - { OV9740_X_ADDR_START_LO, 0xa0 }, - { OV9740_Y_ADDR_START_HI, 0x00 }, - { OV9740_Y_ADDR_START_LO, 0x00 }, - { OV9740_X_ADDR_END_HI, 0x04 }, - { OV9740_X_ADDR_END_LO, 0x63 }, - { OV9740_Y_ADDR_END_HI, 0x02 }, - { OV9740_Y_ADDR_END_LO, 0xd3 }, - { OV9740_X_OUTPUT_SIZE_HI, 0x02 }, - { OV9740_X_OUTPUT_SIZE_LO, 0x80 }, - { OV9740_Y_OUTPUT_SIZE_HI, 0x01 }, - { OV9740_Y_OUTPUT_SIZE_LO, 0xe0 }, - { OV9740_ISP_CTRL1E, 0x03 }, - { OV9740_ISP_CTRL1F, 0xc0 }, - { OV9740_ISP_CTRL20, 0x02 }, - { OV9740_ISP_CTRL21, 0xd0 }, - { OV9740_VFIFO_READ_START_HI, 0x01 }, - { OV9740_VFIFO_READ_START_LO, 0x40 }, - { OV9740_ISP_CTRL00, 0xff }, - { OV9740_ISP_CTRL01, 0xff }, - { OV9740_ISP_CTRL03, 0xff }, -}; - -static const struct ov9740_reg ov9740_regs_720p[] = { - { OV9740_X_ADDR_START_HI, 0x00 }, - { OV9740_X_ADDR_START_LO, 0x00 }, - { OV9740_Y_ADDR_START_HI, 0x00 }, - { OV9740_Y_ADDR_START_LO, 0x00 }, - { OV9740_X_ADDR_END_HI, 0x05 }, - { OV9740_X_ADDR_END_LO, 0x03 }, - { OV9740_Y_ADDR_END_HI, 0x02 }, - { OV9740_Y_ADDR_END_LO, 0xd3 }, - { OV9740_X_OUTPUT_SIZE_HI, 0x05 }, - { OV9740_X_OUTPUT_SIZE_LO, 0x00 }, - { OV9740_Y_OUTPUT_SIZE_HI, 0x02 }, - { OV9740_Y_OUTPUT_SIZE_LO, 0xd0 }, - { OV9740_ISP_CTRL1E, 0x05 }, - { OV9740_ISP_CTRL1F, 0x00 }, - { OV9740_ISP_CTRL20, 0x02 }, - { OV9740_ISP_CTRL21, 0xd0 }, - { OV9740_VFIFO_READ_START_HI, 0x02 }, - { OV9740_VFIFO_READ_START_LO, 0x30 }, - { OV9740_ISP_CTRL00, 0xff }, - { OV9740_ISP_CTRL01, 0xef }, - { OV9740_ISP_CTRL03, 0xff }, -}; - static enum v4l2_mbus_pixelcode ov9740_codes[] = { V4L2_MBUS_FMT_YUYV8_2X8, }; @@ -727,39 +660,124 @@ static int ov9740_set_register(struct v4l2_subdev *sd, /* select nearest higher resolution for capture */ static void ov9740_res_roundup(u32 *width, u32 *height) { - int i; + /* Width must be a multiple of 4 pixels. */ + *width = ALIGN(*width, 4); - for (i = 0; i < ARRAY_SIZE(ov9740_resolutions); i++) - if ((ov9740_resolutions[i].width >= *width) && - (ov9740_resolutions[i].height >= *height)) { - *width = ov9740_resolutions[i].width; - *height = ov9740_resolutions[i].height; - return; - } + /* Max resolution is 1280x720 (720p). */ + if (*width > OV9740_MAX_WIDTH) + *width = OV9740_MAX_WIDTH; - *width = ov9740_resolutions[OV9740_720P].width; - *height = ov9740_resolutions[OV9740_720P].height; + if (*height > OV9740_MAX_HEIGHT) + *height = OV9740_MAX_HEIGHT; } /* Setup registers according to resolution and color encoding */ -static int ov9740_set_res(struct i2c_client *client, u32 width) +static int ov9740_set_res(struct i2c_client *client, u32 width, u32 height) { + u32 x_start; + u32 y_start; + u32 x_end; + u32 y_end; + bool scaling = 0; + u32 scale_input_x; + u32 scale_input_y; int ret; - /* select register configuration for given resolution */ - if (width == ov9740_resolutions[OV9740_VGA].width) { - dev_dbg(&client->dev, "Setting image size to 640x480\n"); - ret = ov9740_reg_write_array(client, ov9740_regs_vga, - ARRAY_SIZE(ov9740_regs_vga)); - } else if (width == ov9740_resolutions[OV9740_720P].width) { - dev_dbg(&client->dev, "Setting image size to 1280x720\n"); - ret = ov9740_reg_write_array(client, ov9740_regs_720p, - ARRAY_SIZE(ov9740_regs_720p)); + if ((width != OV9740_MAX_WIDTH) || (height != OV9740_MAX_HEIGHT)) + scaling = 1; + + /* + * Try to use as much of the sensor area as possible when supporting + * smaller resolutions. Depending on the aspect ratio of the + * chosen resolution, we can either use the full width of the sensor, + * or the full height of the sensor (or both if the aspect ratio is + * the same as 1280x720. + */ + if ((OV9740_MAX_WIDTH * height) > (OV9740_MAX_HEIGHT * width)) { + scale_input_x = (OV9740_MAX_HEIGHT * width) / height; + scale_input_y = OV9740_MAX_HEIGHT; } else { - dev_err(&client->dev, "Failed to select resolution!\n"); - return -EINVAL; + scale_input_x = OV9740_MAX_WIDTH; + scale_input_y = (OV9740_MAX_WIDTH * height) / width; } + /* These describe the area of the sensor to use. */ + x_start = (OV9740_MAX_WIDTH - scale_input_x) / 2; + y_start = (OV9740_MAX_HEIGHT - scale_input_y) / 2; + x_end = x_start + scale_input_x - 1; + y_end = y_start + scale_input_y - 1; + + ret = ov9740_reg_write(client, OV9740_X_ADDR_START_HI, x_start >> 8); + if (ret) + goto done; + ret = ov9740_reg_write(client, OV9740_X_ADDR_START_LO, x_start & 0xff); + if (ret) + goto done; + ret = ov9740_reg_write(client, OV9740_Y_ADDR_START_HI, y_start >> 8); + if (ret) + goto done; + ret = ov9740_reg_write(client, OV9740_Y_ADDR_START_LO, y_start & 0xff); + if (ret) + goto done; + + ret = ov9740_reg_write(client, OV9740_X_ADDR_END_HI, x_end >> 8); + if (ret) + goto done; + ret = ov9740_reg_write(client, OV9740_X_ADDR_END_LO, x_end & 0xff); + if (ret) + goto done; + ret = ov9740_reg_write(client, OV9740_Y_ADDR_END_HI, y_end >> 8); + if (ret) + goto done; + ret = ov9740_reg_write(client, OV9740_Y_ADDR_END_LO, y_end & 0xff); + if (ret) + goto done; + + ret = ov9740_reg_write(client, OV9740_X_OUTPUT_SIZE_HI, width >> 8); + if (ret) + goto done; + ret = ov9740_reg_write(client, OV9740_X_OUTPUT_SIZE_LO, width & 0xff); + if (ret) + goto done; + ret = ov9740_reg_write(client, OV9740_Y_OUTPUT_SIZE_HI, height >> 8); + if (ret) + goto done; + ret = ov9740_reg_write(client, OV9740_Y_OUTPUT_SIZE_LO, height & 0xff); + if (ret) + goto done; + + ret = ov9740_reg_write(client, OV9740_ISP_CTRL1E, scale_input_x >> 8); + if (ret) + goto done; + ret = ov9740_reg_write(client, OV9740_ISP_CTRL1F, scale_input_x & 0xff); + if (ret) + goto done; + ret = ov9740_reg_write(client, OV9740_ISP_CTRL20, scale_input_y >> 8); + if (ret) + goto done; + ret = ov9740_reg_write(client, OV9740_ISP_CTRL21, scale_input_y & 0xff); + if (ret) + goto done; + + ret = ov9740_reg_write(client, OV9740_VFIFO_READ_START_HI, + (scale_input_x - width) >> 8); + if (ret) + goto done; + ret = ov9740_reg_write(client, OV9740_VFIFO_READ_START_LO, + (scale_input_x - width) & 0xff); + if (ret) + goto done; + + ret = ov9740_reg_write(client, OV9740_ISP_CTRL00, 0xff); + if (ret) + goto done; + ret = ov9740_reg_write(client, OV9740_ISP_CTRL01, 0xef | + (scaling << 4)); + if (ret) + goto done; + ret = ov9740_reg_write(client, OV9740_ISP_CTRL03, 0xff); + +done: return ret; } @@ -787,7 +805,7 @@ static int ov9740_s_fmt(struct v4l2_subdev *sd, if (ret < 0) return ret; - ret = ov9740_set_res(client, mf->width); + ret = ov9740_set_res(client, mf->width, mf->height); if (ret < 0) return ret; @@ -824,8 +842,8 @@ static int ov9740_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a) { a->bounds.left = 0; a->bounds.top = 0; - a->bounds.width = ov9740_resolutions[OV9740_720P].width; - a->bounds.height = ov9740_resolutions[OV9740_720P].height; + a->bounds.width = OV9740_MAX_WIDTH; + a->bounds.height = OV9740_MAX_HEIGHT; a->defrect = a->bounds; a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; a->pixelaspect.numerator = 1; @@ -838,8 +856,8 @@ static int ov9740_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) { a->c.left = 0; a->c.top = 0; - a->c.width = ov9740_resolutions[OV9740_720P].width; - a->c.height = ov9740_resolutions[OV9740_720P].height; + a->c.width = OV9740_MAX_WIDTH; + a->c.height = OV9740_MAX_HEIGHT; a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; return 0; |