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-rw-r--r--Documentation/video4linux/soc-camera.txt40
-rw-r--r--drivers/media/video/mt9m001.c142
-rw-r--r--drivers/media/video/mt9m111.c112
-rw-r--r--drivers/media/video/mt9t031.c220
-rw-r--r--drivers/media/video/mt9v022.c131
-rw-r--r--drivers/media/video/mx1_camera.c10
-rw-r--r--drivers/media/video/mx3_camera.c114
-rw-r--r--drivers/media/video/ov772x.c84
-rw-r--r--drivers/media/video/pxa_camera.c201
-rw-r--r--drivers/media/video/sh_mobile_ceu_camera.c828
-rw-r--r--drivers/media/video/soc_camera.c130
-rw-r--r--drivers/media/video/soc_camera_platform.c4
-rw-r--r--drivers/media/video/tw9910.c120
-rw-r--r--include/media/soc_camera.h21
14 files changed, 1524 insertions, 633 deletions
diff --git a/Documentation/video4linux/soc-camera.txt b/Documentation/video4linux/soc-camera.txt
index 178ef3c5e57..3f87c7da4ca 100644
--- a/Documentation/video4linux/soc-camera.txt
+++ b/Documentation/video4linux/soc-camera.txt
@@ -116,5 +116,45 @@ functionality.
struct soc_camera_device also links to an array of struct soc_camera_data_format,
listing pixel formats, supported by the camera.
+VIDIOC_S_CROP and VIDIOC_S_FMT behaviour
+----------------------------------------
+
+Above user ioctls modify image geometry as follows:
+
+VIDIOC_S_CROP: sets location and sizes of the sensor window. Unit is one sensor
+pixel. Changing sensor window sizes preserves any scaling factors, therefore
+user window sizes change as well.
+
+VIDIOC_S_FMT: sets user window. Should preserve previously set sensor window as
+much as possible by modifying scaling factors. If the sensor window cannot be
+preserved precisely, it may be changed too.
+
+In soc-camera there are two locations, where scaling and cropping can taks
+place: in the camera driver and in the host driver. User ioctls are first passed
+to the host driver, which then generally passes them down to the camera driver.
+It is more efficient to perform scaling and cropping in the camera driver to
+save camera bus bandwidth and maximise the framerate. However, if the camera
+driver failed to set the required parameters with sufficient precision, the host
+driver may decide to also use its own scaling and cropping to fulfill the user's
+request.
+
+Camera drivers are interfaced to the soc-camera core and to host drivers over
+the v4l2-subdev API, which is completely functional, it doesn't pass any data.
+Therefore all camera drivers shall reply to .g_fmt() requests with their current
+output geometry. This is necessary to correctly configure the camera bus.
+.s_fmt() and .try_fmt() have to be implemented too. Sensor window and scaling
+factors have to be maintained by camera drivers internally. According to the
+V4L2 API all capture drivers must support the VIDIOC_CROPCAP ioctl, hence we
+rely on camera drivers implementing .cropcap(). If the camera driver does not
+support cropping, it may choose to not implement .s_crop(), but to enable
+cropping support by the camera host driver at least the .g_crop method must be
+implemented.
+
+User window geometry is kept in .user_width and .user_height fields in struct
+soc_camera_device and used by the soc-camera core and host drivers. The core
+updates these fields upon successful completion of a .s_fmt() call, but if these
+fields change elsewhere, e.g., during .s_crop() processing, the host driver is
+responsible for updating them.
+
--
Author: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
diff --git a/drivers/media/video/mt9m001.c b/drivers/media/video/mt9m001.c
index 775e1a3c98d..e8cf56189ef 100644
--- a/drivers/media/video/mt9m001.c
+++ b/drivers/media/video/mt9m001.c
@@ -39,6 +39,13 @@
#define MT9M001_GLOBAL_GAIN 0x35
#define MT9M001_CHIP_ENABLE 0xF1
+#define MT9M001_MAX_WIDTH 1280
+#define MT9M001_MAX_HEIGHT 1024
+#define MT9M001_MIN_WIDTH 48
+#define MT9M001_MIN_HEIGHT 32
+#define MT9M001_COLUMN_SKIP 20
+#define MT9M001_ROW_SKIP 12
+
static const struct soc_camera_data_format mt9m001_colour_formats[] = {
/* Order important: first natively supported,
* second supported with a GPIO extender */
@@ -70,6 +77,8 @@ static const struct soc_camera_data_format mt9m001_monochrome_formats[] = {
struct mt9m001 {
struct v4l2_subdev subdev;
+ struct v4l2_rect rect; /* Sensor window */
+ __u32 fourcc;
int model; /* V4L2_IDENT_MT9M001* codes from v4l2-chip-ident.h */
unsigned char autoexposure;
};
@@ -196,13 +205,31 @@ static unsigned long mt9m001_query_bus_param(struct soc_camera_device *icd)
static int mt9m001_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
{
- struct v4l2_rect *rect = &a->c;
struct i2c_client *client = sd->priv;
struct mt9m001 *mt9m001 = to_mt9m001(client);
+ struct v4l2_rect rect = a->c;
struct soc_camera_device *icd = client->dev.platform_data;
int ret;
const u16 hblank = 9, vblank = 25;
+ if (mt9m001->fourcc == V4L2_PIX_FMT_SBGGR8 ||
+ mt9m001->fourcc == V4L2_PIX_FMT_SBGGR16)
+ /*
+ * Bayer format - even number of rows for simplicity,
+ * but let the user play with the top row.
+ */
+ rect.height = ALIGN(rect.height, 2);
+
+ /* Datasheet requirement: see register description */
+ rect.width = ALIGN(rect.width, 2);
+ rect.left = ALIGN(rect.left, 2);
+
+ soc_camera_limit_side(&rect.left, &rect.width,
+ MT9M001_COLUMN_SKIP, MT9M001_MIN_WIDTH, MT9M001_MAX_WIDTH);
+
+ soc_camera_limit_side(&rect.top, &rect.height,
+ MT9M001_ROW_SKIP, MT9M001_MIN_HEIGHT, MT9M001_MAX_HEIGHT);
+
/* Blanking and start values - default... */
ret = reg_write(client, MT9M001_HORIZONTAL_BLANKING, hblank);
if (!ret)
@@ -211,46 +238,98 @@ static int mt9m001_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
/* The caller provides a supported format, as verified per
* call to icd->try_fmt() */
if (!ret)
- ret = reg_write(client, MT9M001_COLUMN_START, rect->left);
+ ret = reg_write(client, MT9M001_COLUMN_START, rect.left);
if (!ret)
- ret = reg_write(client, MT9M001_ROW_START, rect->top);
+ ret = reg_write(client, MT9M001_ROW_START, rect.top);
if (!ret)
- ret = reg_write(client, MT9M001_WINDOW_WIDTH, rect->width - 1);
+ ret = reg_write(client, MT9M001_WINDOW_WIDTH, rect.width - 1);
if (!ret)
ret = reg_write(client, MT9M001_WINDOW_HEIGHT,
- rect->height + icd->y_skip_top - 1);
+ rect.height + icd->y_skip_top - 1);
if (!ret && mt9m001->autoexposure) {
ret = reg_write(client, MT9M001_SHUTTER_WIDTH,
- rect->height + icd->y_skip_top + vblank);
+ rect.height + icd->y_skip_top + vblank);
if (!ret) {
const struct v4l2_queryctrl *qctrl =
soc_camera_find_qctrl(icd->ops,
V4L2_CID_EXPOSURE);
- icd->exposure = (524 + (rect->height + icd->y_skip_top +
+ icd->exposure = (524 + (rect.height + icd->y_skip_top +
vblank - 1) *
(qctrl->maximum - qctrl->minimum)) /
1048 + qctrl->minimum;
}
}
+ if (!ret)
+ mt9m001->rect = rect;
+
return ret;
}
+static int mt9m001_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
+{
+ struct i2c_client *client = sd->priv;
+ struct mt9m001 *mt9m001 = to_mt9m001(client);
+
+ a->c = mt9m001->rect;
+ a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+
+ return 0;
+}
+
+static int mt9m001_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
+{
+ a->bounds.left = MT9M001_COLUMN_SKIP;
+ a->bounds.top = MT9M001_ROW_SKIP;
+ a->bounds.width = MT9M001_MAX_WIDTH;
+ a->bounds.height = MT9M001_MAX_HEIGHT;
+ a->defrect = a->bounds;
+ a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ a->pixelaspect.numerator = 1;
+ a->pixelaspect.denominator = 1;
+
+ return 0;
+}
+
+static int mt9m001_g_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
+{
+ struct i2c_client *client = sd->priv;
+ struct mt9m001 *mt9m001 = to_mt9m001(client);
+ struct v4l2_pix_format *pix = &f->fmt.pix;
+
+ pix->width = mt9m001->rect.width;
+ pix->height = mt9m001->rect.height;
+ pix->pixelformat = mt9m001->fourcc;
+ pix->field = V4L2_FIELD_NONE;
+ pix->colorspace = V4L2_COLORSPACE_SRGB;
+
+ return 0;
+}
+
static int mt9m001_s_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
{
struct i2c_client *client = sd->priv;
- struct soc_camera_device *icd = client->dev.platform_data;
+ struct mt9m001 *mt9m001 = to_mt9m001(client);
+ struct v4l2_pix_format *pix = &f->fmt.pix;
struct v4l2_crop a = {
.c = {
- .left = icd->rect_current.left,
- .top = icd->rect_current.top,
- .width = f->fmt.pix.width,
- .height = f->fmt.pix.height,
+ .left = mt9m001->rect.left,
+ .top = mt9m001->rect.top,
+ .width = pix->width,
+ .height = pix->height,
},
};
+ int ret;
/* No support for scaling so far, just crop. TODO: use skipping */
- return mt9m001_s_crop(sd, &a);
+ ret = mt9m001_s_crop(sd, &a);
+ if (!ret) {
+ pix->width = mt9m001->rect.width;
+ pix->height = mt9m001->rect.height;
+ mt9m001->fourcc = pix->pixelformat;
+ }
+
+ return ret;
}
static int mt9m001_try_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
@@ -259,9 +338,14 @@ static int mt9m001_try_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
struct soc_camera_device *icd = client->dev.platform_data;
struct v4l2_pix_format *pix = &f->fmt.pix;
- v4l_bound_align_image(&pix->width, 48, 1280, 1,
- &pix->height, 32 + icd->y_skip_top,
- 1024 + icd->y_skip_top, 0, 0);
+ v4l_bound_align_image(&pix->width, MT9M001_MIN_WIDTH,
+ MT9M001_MAX_WIDTH, 1,
+ &pix->height, MT9M001_MIN_HEIGHT + icd->y_skip_top,
+ MT9M001_MAX_HEIGHT + icd->y_skip_top, 0, 0);
+
+ if (pix->pixelformat == V4L2_PIX_FMT_SBGGR8 ||
+ pix->pixelformat == V4L2_PIX_FMT_SBGGR16)
+ pix->height = ALIGN(pix->height - 1, 2);
return 0;
}
@@ -472,11 +556,11 @@ static int mt9m001_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
if (ctrl->value) {
const u16 vblank = 25;
if (reg_write(client, MT9M001_SHUTTER_WIDTH,
- icd->rect_current.height +
+ mt9m001->rect.height +
icd->y_skip_top + vblank) < 0)
return -EIO;
qctrl = soc_camera_find_qctrl(icd->ops, V4L2_CID_EXPOSURE);
- icd->exposure = (524 + (icd->rect_current.height +
+ icd->exposure = (524 + (mt9m001->rect.height +
icd->y_skip_top + vblank - 1) *
(qctrl->maximum - qctrl->minimum)) /
1048 + qctrl->minimum;
@@ -548,6 +632,8 @@ static int mt9m001_video_probe(struct soc_camera_device *icd,
if (flags & SOCAM_DATAWIDTH_8)
icd->num_formats++;
+ mt9m001->fourcc = icd->formats->fourcc;
+
dev_info(&client->dev, "Detected a MT9M001 chip ID %x (%s)\n", data,
data == 0x8431 ? "C12STM" : "C12ST");
@@ -556,10 +642,9 @@ static int mt9m001_video_probe(struct soc_camera_device *icd,
static void mt9m001_video_remove(struct soc_camera_device *icd)
{
- struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
struct soc_camera_link *icl = to_soc_camera_link(icd);
- dev_dbg(&client->dev, "Video %x removed: %p, %p\n", client->addr,
+ dev_dbg(&icd->dev, "Video removed: %p, %p\n",
icd->dev.parent, icd->vdev);
if (icl->free_bus)
icl->free_bus(icl);
@@ -578,8 +663,11 @@ static struct v4l2_subdev_core_ops mt9m001_subdev_core_ops = {
static struct v4l2_subdev_video_ops mt9m001_subdev_video_ops = {
.s_stream = mt9m001_s_stream,
.s_fmt = mt9m001_s_fmt,
+ .g_fmt = mt9m001_g_fmt,
.try_fmt = mt9m001_try_fmt,
.s_crop = mt9m001_s_crop,
+ .g_crop = mt9m001_g_crop,
+ .cropcap = mt9m001_cropcap,
};
static struct v4l2_subdev_ops mt9m001_subdev_ops = {
@@ -621,15 +709,13 @@ static int mt9m001_probe(struct i2c_client *client,
/* Second stage probe - when a capture adapter is there */
icd->ops = &mt9m001_ops;
- icd->rect_max.left = 20;
- icd->rect_max.top = 12;
- icd->rect_max.width = 1280;
- icd->rect_max.height = 1024;
- icd->rect_current.left = 20;
- icd->rect_current.top = 12;
- icd->width_min = 48;
- icd->height_min = 32;
icd->y_skip_top = 1;
+
+ mt9m001->rect.left = MT9M001_COLUMN_SKIP;
+ mt9m001->rect.top = MT9M001_ROW_SKIP;
+ mt9m001->rect.width = MT9M001_MAX_WIDTH;
+ mt9m001->rect.height = MT9M001_MAX_HEIGHT;
+
/* Simulated autoexposure. If enabled, we calculate shutter width
* ourselves in the driver based on vertical blanking and frame width */
mt9m001->autoexposure = 1;
diff --git a/drivers/media/video/mt9m111.c b/drivers/media/video/mt9m111.c
index 3637376da75..920dd53c4cf 100644
--- a/drivers/media/video/mt9m111.c
+++ b/drivers/media/video/mt9m111.c
@@ -194,7 +194,7 @@ static int mt9m111_reg_read(struct i2c_client *client, const u16 reg)
ret = reg_page_map_set(client, reg);
if (!ret)
- ret = swab16(i2c_smbus_read_word_data(client, (reg & 0xff)));
+ ret = swab16(i2c_smbus_read_word_data(client, reg & 0xff));
dev_dbg(&client->dev, "read reg.%03x -> %04x\n", reg, ret);
return ret;
@@ -257,8 +257,8 @@ static int mt9m111_setup_rect(struct i2c_client *client,
int width = rect->width;
int height = rect->height;
- if ((mt9m111->pixfmt == V4L2_PIX_FMT_SBGGR8)
- || (mt9m111->pixfmt == V4L2_PIX_FMT_SBGGR16))
+ if (mt9m111->pixfmt == V4L2_PIX_FMT_SBGGR8 ||
+ mt9m111->pixfmt == V4L2_PIX_FMT_SBGGR16)
is_raw_format = 1;
else
is_raw_format = 0;
@@ -395,23 +395,85 @@ static int mt9m111_set_bus_param(struct soc_camera_device *icd, unsigned long f)
return 0;
}
+static int mt9m111_make_rect(struct i2c_client *client,
+ struct v4l2_rect *rect)
+{
+ struct mt9m111 *mt9m111 = to_mt9m111(client);
+
+ if (mt9m111->pixfmt == V4L2_PIX_FMT_SBGGR8 ||
+ mt9m111->pixfmt == V4L2_PIX_FMT_SBGGR16) {
+ /* Bayer format - even size lengths */
+ rect->width = ALIGN(rect->width, 2);
+ rect->height = ALIGN(rect->height, 2);
+ /* Let the user play with the starting pixel */
+ }
+
+ /* FIXME: the datasheet doesn't specify minimum sizes */
+ soc_camera_limit_side(&rect->left, &rect->width,
+ MT9M111_MIN_DARK_COLS, 2, MT9M111_MAX_WIDTH);
+
+ soc_camera_limit_side(&rect->top, &rect->height,
+ MT9M111_MIN_DARK_ROWS, 2, MT9M111_MAX_HEIGHT);
+
+ return mt9m111_setup_rect(client, rect);
+}
+
static int mt9m111_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
{
- struct v4l2_rect *rect = &a->c;
+ struct v4l2_rect rect = a->c;
struct i2c_client *client = sd->priv;
struct mt9m111 *mt9m111 = to_mt9m111(client);
int ret;
dev_dbg(&client->dev, "%s left=%d, top=%d, width=%d, height=%d\n",
- __func__, rect->left, rect->top, rect->width,
- rect->height);
+ __func__, rect.left, rect.top, rect.width, rect.height);
- ret = mt9m111_setup_rect(client, rect);
+ ret = mt9m111_make_rect(client, &rect);
if (!ret)
- mt9m111->rect = *rect;
+ mt9m111->rect = rect;
return ret;
}
+static int mt9m111_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
+{
+ struct i2c_client *client = sd->priv;
+ struct mt9m111 *mt9m111 = to_mt9m111(client);
+
+ a->c = mt9m111->rect;
+ a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+
+ return 0;
+}
+
+static int mt9m111_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
+{
+ a->bounds.left = MT9M111_MIN_DARK_COLS;
+ a->bounds.top = MT9M111_MIN_DARK_ROWS;
+ a->bounds.width = MT9M111_MAX_WIDTH;
+ a->bounds.height = MT9M111_MAX_HEIGHT;
+ a->defrect = a->bounds;
+ a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ a->pixelaspect.numerator = 1;
+ a->pixelaspect.denominator = 1;
+
+ return 0;
+}
+
+static int mt9m111_g_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
+{
+ struct i2c_client *client = sd->priv;
+ struct mt9m111 *mt9m111 = to_mt9m111(client);
+ struct v4l2_pix_format *pix = &f->fmt.pix;
+
+ pix->width = mt9m111->rect.width;
+ pix->height = mt9m111->rect.height;
+ pix->pixelformat = mt9m111->pixfmt;
+ pix->field = V4L2_FIELD_NONE;
+ pix->colorspace = V4L2_COLORSPACE_SRGB;
+
+ return 0;
+}
+
static int mt9m111_set_pixfmt(struct i2c_client *client, u32 pixfmt)
{
struct mt9m111 *mt9m111 = to_mt9m111(client);
@@ -478,7 +540,7 @@ static int mt9m111_s_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
__func__, pix->pixelformat, rect.left, rect.top, rect.width,
rect.height);
- ret = mt9m111_setup_rect(client, &rect);
+ ret = mt9m111_make_rect(client, &rect);
if (!ret)
ret = mt9m111_set_pixfmt(client, pix->pixelformat);
if (!ret)
@@ -489,11 +551,27 @@ static int mt9m111_s_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
static int mt9m111_try_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
{
struct v4l2_pix_format *pix = &f->fmt.pix;
+ bool bayer = pix->pixelformat == V4L2_PIX_FMT_SBGGR8 ||
+ pix->pixelformat == V4L2_PIX_FMT_SBGGR16;
+
+ /*
+ * With Bayer format enforce even side lengths, but let the user play
+ * with the starting pixel
+ */
if (pix->height > MT9M111_MAX_HEIGHT)
pix->height = MT9M111_MAX_HEIGHT;
+ else if (pix->height < 2)
+ pix->height = 2;
+ else if (bayer)
+ pix->height = ALIGN(pix->height, 2);
+
if (pix->width > MT9M111_MAX_WIDTH)
pix->width = MT9M111_MAX_WIDTH;
+ else if (pix->width < 2)
+ pix->width = 2;
+ else if (bayer)
+ pix->width = ALIGN(pix->width, 2);
return 0;
}
@@ -906,8 +984,11 @@ static struct v4l2_subdev_core_ops mt9m111_subdev_core_ops = {
static struct v4l2_subdev_video_ops mt9m111_subdev_video_ops = {
.s_fmt = mt9m111_s_fmt,
+ .g_fmt = mt9m111_g_fmt,
.try_fmt = mt9m111_try_fmt,
.s_crop = mt9m111_s_crop,
+ .g_crop = mt9m111_g_crop,
+ .cropcap = mt9m111_cropcap,
};
static struct v4l2_subdev_ops mt9m111_subdev_ops = {
@@ -949,16 +1030,13 @@ static int mt9m111_probe(struct i2c_client *client,
/* Second stage probe - when a capture adapter is there */
icd->ops = &mt9m111_ops;
- icd->rect_max.left = MT9M111_MIN_DARK_COLS;
- icd->rect_max.top = MT9M111_MIN_DARK_ROWS;
- icd->rect_max.width = MT9M111_MAX_WIDTH;
- icd->rect_max.height = MT9M111_MAX_HEIGHT;
- icd->rect_current.left = icd->rect_max.left;
- icd->rect_current.top = icd->rect_max.top;
- icd->width_min = MT9M111_MIN_DARK_ROWS;
- icd->height_min = MT9M111_MIN_DARK_COLS;
icd->y_skip_top = 0;
+ mt9m111->rect.left = MT9M111_MIN_DARK_COLS;
+ mt9m111->rect.top = MT9M111_MIN_DARK_ROWS;
+ mt9m111->rect.width = MT9M111_MAX_WIDTH;
+ mt9m111->rect.height = MT9M111_MAX_HEIGHT;
+
ret = mt9m111_video_probe(icd, client);
if (ret) {
icd->ops = NULL;
diff --git a/drivers/media/video/mt9t031.c b/drivers/media/video/mt9t031.c
index cd3eb7731ac..f234ba60204 100644
--- a/drivers/media/video/mt9t031.c
+++ b/drivers/media/video/mt9t031.c
@@ -47,7 +47,7 @@
#define MT9T031_MAX_HEIGHT 1536
#define MT9T031_MAX_WIDTH 2048
#define MT9T031_MIN_HEIGHT 2
-#define MT9T031_MIN_WIDTH 2
+#define MT9T031_MIN_WIDTH 18
#define MT9T031_HORIZONTAL_BLANK 142
#define MT9T031_VERTICAL_BLANK 25
#define MT9T031_COLUMN_SKIP 32
@@ -69,10 +69,11 @@ static const struct soc_camera_data_format mt9t031_colour_formats[] = {
struct mt9t031 {
struct v4l2_subdev subdev;
+ struct v4l2_rect rect; /* Sensor window */
int model; /* V4L2_IDENT_MT9T031* codes from v4l2-chip-ident.h */
- unsigned char autoexposure;
u16 xskip;
u16 yskip;
+ unsigned char autoexposure;
};
static struct mt9t031 *to_mt9t031(const struct i2c_client *client)
@@ -218,56 +219,68 @@ static unsigned long mt9t031_query_bus_param(struct soc_camera_device *icd)
return soc_camera_apply_sensor_flags(icl, MT9T031_BUS_PARAM);
}
-/* Round up minima and round down maxima */
-static void recalculate_limits(struct soc_camera_device *icd,
- u16 xskip, u16 yskip)
+/* target must be _even_ */
+static u16 mt9t031_skip(s32 *source, s32 target, s32 max)
{
- icd->rect_max.left = (MT9T031_COLUMN_SKIP + xskip - 1) / xskip;
- icd->rect_max.top = (MT9T031_ROW_SKIP + yskip - 1) / yskip;
- icd->width_min = (MT9T031_MIN_WIDTH + xskip - 1) / xskip;
- icd->height_min = (MT9T031_MIN_HEIGHT + yskip - 1) / yskip;
- icd->rect_max.width = MT9T031_MAX_WIDTH / xskip;
- icd->rect_max.height = MT9T031_MAX_HEIGHT / yskip;
+ unsigned int skip;
+
+ if (*source < target + target / 2) {
+ *source = target;
+ return 1;
+ }
+
+ skip = min(max, *source + target / 2) / target;
+ if (skip > 8)
+ skip = 8;
+ *source = target * skip;
+
+ return skip;
}
+/* rect is the sensor rectangle, the caller guarantees parameter validity */
static int mt9t031_set_params(struct soc_camera_device *icd,
struct v4l2_rect *rect, u16 xskip, u16 yskip)
{
struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
struct mt9t031 *mt9t031 = to_mt9t031(client);
int ret;
- u16 xbin, ybin, width, height, left, top;
+ u16 xbin, ybin;
const u16 hblank = MT9T031_HORIZONTAL_BLANK,
vblank = MT9T031_VERTICAL_BLANK;
- width = rect->width * xskip;
- height = rect->height * yskip;
- left = rect->left * xskip;
- top = rect->top * yskip;
-
xbin = min(xskip, (u16)3);
ybin = min(yskip, (u16)3);
- dev_dbg(&client->dev, "xskip %u, width %u/%u, yskip %u, height %u/%u\n",
- xskip, width, rect->width, yskip, height, rect->height);
-
- /* Could just do roundup(rect->left, [xy]bin * 2); but this is cheaper */
+ /*
+ * Could just do roundup(rect->left, [xy]bin * 2); but this is cheaper.
+ * There is always a valid suitably aligned value. The worst case is
+ * xbin = 3, width = 2048. Then we will start at 36, the last read out
+ * pixel will be 2083, which is < 2085 - first black pixel.
+ *
+ * MT9T031 datasheet imposes window left border alignment, depending on
+ * the selected xskip. Failing to conform to this requirement produces
+ * dark horizontal stripes in the image. However, even obeying to this
+ * requirement doesn't eliminate the stripes in all configurations. They
+ * appear "locally reproducibly," but can differ between tests under
+ * different lighting conditions.
+ */
switch (xbin) {
- case 2:
- left = (left + 3) & ~3;
+ case 1:
+ rect->left &= ~1;
break;
- case 3:
- left = roundup(left, 6);
- }
-
- switch (ybin) {
case 2:
- top = (top + 3) & ~3;
+ rect->left &= ~3;
break;
case 3:
- top = roundup(top, 6);
+ rect->left = rect->left > roundup(MT9T031_COLUMN_SKIP, 6) ?
+ (rect->left / 6) * 6 : roundup(MT9T031_COLUMN_SKIP, 6);
}
+ rect->top &= ~1;
+
+ dev_dbg(&client->dev, "skip %u:%u, rect %ux%u@%u:%u\n",
+ xskip, yskip, rect->width, rect->height, rect->left, rect->top);
+
/* Disable register update, reconfigure atomically */
ret = reg_set(client, MT9T031_OUTPUT_CONTROL, 1);
if (ret < 0)
@@ -287,27 +300,29 @@ static int mt9t031_set_params(struct soc_camera_device *icd,
ret = reg_write(client, MT9T031_ROW_ADDRESS_MODE,
((ybin - 1) << 4) | (yskip - 1));
}
- dev_dbg(&client->dev, "new physical left %u, top %u\n", left, top);
+ dev_dbg(&client->dev, "new physical left %u, top %u\n",
+ rect->left, rect->top);
/* The caller provides a supported format, as guaranteed by
* icd->try_fmt_cap(), soc_camera_s_crop() and soc_camera_cropcap() */
if (ret >= 0)
- ret = reg_write(client, MT9T031_COLUMN_START, left);
+ ret = reg_write(client, MT9T031_COLUMN_START, rect->left);
if (ret >= 0)
- ret = reg_write(client, MT9T031_ROW_START, top);
+ ret = reg_write(client, MT9T031_ROW_START, rect->top);
if (ret >= 0)
- ret = reg_write(client, MT9T031_WINDOW_WIDTH, width - 1);
+ ret = reg_write(client, MT9T031_WINDOW_WIDTH, rect->width - 1);
if (ret >= 0)
ret = reg_write(client, MT9T031_WINDOW_HEIGHT,
- height + icd->y_skip_top - 1);
+ rect->height + icd->y_skip_top - 1);
if (ret >= 0 && mt9t031->autoexposure) {
- ret = set_shutter(client, height + icd->y_skip_top + vblank);
+ ret = set_shutter(client,
+ rect->height + icd->y_skip_top + vblank);
if (ret >= 0) {
const u32 shutter_max = MT9T031_MAX_HEIGHT + vblank;
const struct v4l2_queryctrl *qctrl =
soc_camera_find_qctrl(icd->ops,
V4L2_CID_EXPOSURE);
- icd->exposure = (shutter_max / 2 + (height +
+ icd->exposure = (shutter_max / 2 + (rect->height +
icd->y_skip_top + vblank - 1) *
(qctrl->maximum - qctrl->minimum)) /
shutter_max + qctrl->minimum;
@@ -318,27 +333,72 @@ static int mt9t031_set_params(struct soc_camera_device *icd,
if (ret >= 0)
ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 1);
+ if (ret >= 0) {
+ mt9t031->rect = *rect;
+ mt9t031->xskip = xskip;
+ mt9t031->yskip = yskip;
+ }
+
return ret < 0 ? ret : 0;
}
static int mt9t031_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
{
- struct v4l2_rect *rect = &a->c;
+ struct v4l2_rect rect = a->c;
struct i2c_client *client = sd->priv;
struct mt9t031 *mt9t031 = to_mt9t031(client);
struct soc_camera_device *icd = client->dev.platform_data;
- /* Make sure we don't exceed sensor limits */
- if (rect->left + rect->width > icd->rect_max.left + icd->rect_max.width)
- rect->left = icd->rect_max.width + icd->rect_max.left -
- rect->width;
+ rect.width = ALIGN(rect.width, 2);
+ rect.height = ALIGN(rect.height, 2);
+
+ soc_camera_limit_side(&rect.left, &rect.width,
+ MT9T031_COLUMN_SKIP, MT9T031_MIN_WIDTH, MT9T031_MAX_WIDTH);
+
+ soc_camera_limit_side(&rect.top, &rect.height,
+ MT9T031_ROW_SKIP, MT9T031_MIN_HEIGHT, MT9T031_MAX_HEIGHT);
+
+ return mt9t031_set_params(icd, &rect, mt9t031->xskip, mt9t031->yskip);
+}
+
+static int mt9t031_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
+{
+ struct i2c_client *client = sd->priv;
+ struct mt9t031 *mt9t031 = to_mt9t031(client);
+
+ a->c = mt9t031->rect;
+ a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
- if (rect->top + rect->height > icd->rect_max.height + icd->rect_max.top)
- rect->top = icd->rect_max.height + icd->rect_max.top -
- rect->height;
+ return 0;
+}
+
+static int mt9t031_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
+{
+ a->bounds.left = MT9T031_COLUMN_SKIP;
+ a->bounds.top = MT9T031_ROW_SKIP;
+ a->bounds.width = MT9T031_MAX_WIDTH;
+ a->bounds.height = MT9T031_MAX_HEIGHT;
+ a->defrect = a->bounds;
+ a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ a->pixelaspect.numerator = 1;
+ a->pixelaspect.denominator = 1;
- /* CROP - no change in scaling, or in limits */
- return mt9t031_set_params(icd, rect, mt9t031->xskip, mt9t031->yskip);
+ return 0;
+}
+
+static int mt9t031_g_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
+{
+ struct i2c_client *client = sd->priv;
+ struct mt9t031 *mt9t031 = to_mt9t031(client);
+ struct v4l2_pix_format *pix = &f->fmt.pix;
+
+ pix->width = mt9t031->rect.width / mt9t031->xskip;
+ pix->height = mt9t031->rect.height / mt9t031->yskip;
+ pix->pixelformat = V4L2_PIX_FMT_SGRBG10;
+ pix->field = V4L2_FIELD_NONE;
+ pix->colorspace = V4L2_COLORSPACE_SRGB;
+
+ return 0;
}
static int mt9t031_s_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
@@ -346,40 +406,25 @@ static int mt9t031_s_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
struct i2c_client *client = sd->priv;
struct mt9t031 *mt9t031 = to_mt9t031(client);
struct soc_camera_device *icd = client->dev.platform_data;
- int ret;
+ struct v4l2_pix_format *pix = &f->fmt.pix;
u16 xskip, yskip;
- struct v4l2_rect rect = {
- .left = icd->rect_current.left,
- .top = icd->rect_current.top,
- .width = f->fmt.pix.width,
- .height = f->fmt.pix.height,
- };
+ struct v4l2_rect rect = mt9t031->rect;
/*
- * try_fmt has put rectangle within limits.
- * S_FMT - use binning and skipping for scaling, recalculate
- * limits, used for cropping
+ * try_fmt has put width and height within limits.
+ * S_FMT: use binning and skipping for scaling
*/
- /* Is this more optimal than just a division? */
- for (xskip = 8; xskip > 1; xskip--)
- if (rect.width * xskip <= MT9T031_MAX_WIDTH)
- break;
-
- for (yskip = 8; yskip > 1; yskip--)
- if (rect.height * yskip <= MT9T031_MAX_HEIGHT)
- break;
-
- recalculate_limits(icd, xskip, yskip);
-
- ret = mt9t031_set_params(icd, &rect, xskip, yskip);
- if (!ret) {
- mt9t031->xskip = xskip;
- mt9t031->yskip = yskip;
- }
+ xskip = mt9t031_skip(&rect.width, pix->width, MT9T031_MAX_WIDTH);
+ yskip = mt9t031_skip(&rect.height, pix->height, MT9T031_MAX_HEIGHT);
- return ret;
+ /* mt9t031_set_params() doesn't change width and height */
+ return mt9t031_set_params(icd, &rect, xskip, yskip);
}
+/*
+ * If a user window larger than sensor window is requested, we'll increase the
+ * sensor window.
+ */
static int mt9t031_try_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
{
struct v4l2_pix_format *pix = &f->fmt.pix;
@@ -620,12 +665,12 @@ static int mt9t031_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
if (ctrl->value) {
const u16 vblank = MT9T031_VERTICAL_BLANK;
const u32 shutter_max = MT9T031_MAX_HEIGHT + vblank;
- if (set_shutter(client, icd->rect_current.height +
+ if (set_shutter(client, mt9t031->rect.height +
icd->y_skip_top + vblank) < 0)
return -EIO;
qctrl = soc_camera_find_qctrl(icd->ops, V4L2_CID_EXPOSURE);
icd->exposure = (shutter_max / 2 +
- (icd->rect_current.height +
+ (mt9t031->rect.height +
icd->y_skip_top + vblank - 1) *
(qctrl->maximum - qctrl->minimum)) /
shutter_max + qctrl->minimum;
@@ -645,12 +690,6 @@ static int mt9t031_video_probe(struct i2c_client *client)
struct mt9t031 *mt9t031 = to_mt9t031(client);
s32 data;
- /* We must have a parent by now. And it cannot be a wrong one.
- * So this entire test is completely redundant. */
- if (!icd->dev.parent ||
- to_soc_camera_host(icd->dev.parent)->nr != icd->iface)
- return -ENODEV;
-
/* Enable the chip */
data = reg_write(client, MT9T031_CHIP_ENABLE, 1);
dev_dbg(&client->dev, "write: %d\n", data);
@@ -688,8 +727,11 @@ static struct v4l2_subdev_core_ops mt9t031_subdev_core_ops = {
static struct v4l2_subdev_video_ops mt9t031_subdev_video_ops = {
.s_stream = mt9t031_s_stream,
.s_fmt = mt9t031_s_fmt,
+ .g_fmt = mt9t031_g_fmt,
.try_fmt = mt9t031_try_fmt,
.s_crop = mt9t031_s_crop,
+ .g_crop = mt9t031_g_crop,
+ .cropcap = mt9t031_cropcap,
};
static struct v4l2_subdev_ops mt9t031_subdev_ops = {
@@ -731,15 +773,13 @@ static int mt9t031_probe(struct i2c_client *client,
/* Second stage probe - when a capture adapter is there */
icd->ops = &mt9t031_ops;
- icd->rect_max.left = MT9T031_COLUMN_SKIP;
- icd->rect_max.top = MT9T031_ROW_SKIP;
- icd->rect_current.left = icd->rect_max.left;
- icd->rect_current.top = icd->rect_max.top;
- icd->width_min = MT9T031_MIN_WIDTH;
- icd->rect_max.width = MT9T031_MAX_WIDTH;
- icd->height_min = MT9T031_MIN_HEIGHT;
- icd->rect_max.height = MT9T031_MAX_HEIGHT;
icd->y_skip_top = 0;
+
+ mt9t031->rect.left = MT9T031_COLUMN_SKIP;
+ mt9t031->rect.top = MT9T031_ROW_SKIP;
+ mt9t031->rect.width = MT9T031_MAX_WIDTH;
+ mt9t031->rect.height = MT9T031_MAX_HEIGHT;
+
/* Simulated autoexposure. If enabled, we calculate shutter width
* ourselves in the driver based on vertical blanking and frame width */
mt9t031->autoexposure = 1;
diff --git a/drivers/media/video/mt9v022.c b/drivers/media/video/mt9v022.c
index ab196542528..35ea0ddd071 100644
--- a/drivers/media/video/mt9v022.c
+++ b/drivers/media/video/mt9v022.c
@@ -55,6 +55,13 @@ MODULE_PARM_DESC(sensor_type, "Sensor type: \"colour\" or \"monochrome\"");
/* Progressive scan, master, defaults */
#define MT9V022_CHIP_CONTROL_DEFAULT 0x188
+#define MT9V022_MAX_WIDTH 752
+#define MT9V022_MAX_HEIGHT 480
+#define MT9V022_MIN_WIDTH 48
+#define MT9V022_MIN_HEIGHT 32
+#define MT9V022_COLUMN_SKIP 1
+#define MT9V022_ROW_SKIP 4
+
static const struct soc_camera_data_format mt9v022_colour_formats[] = {
/* Order important: first natively supported,
* second supported with a GPIO extender */
@@ -86,6 +93,8 @@ static const struct soc_camera_data_format mt9v022_monochrome_formats[] = {
struct mt9v022 {
struct v4l2_subdev subdev;
+ struct v4l2_rect rect; /* Sensor window */
+ __u32 fourcc;
int model; /* V4L2_IDENT_MT9V022* codes from v4l2-chip-ident.h */
u16 chip_control;
};
@@ -250,44 +259,101 @@ static unsigned long mt9v022_query_bus_param(struct soc_camera_device *icd)
static int mt9v022_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
{
- struct v4l2_rect *rect = &a->c;
struct i2c_client *client = sd->priv;
+ struct mt9v022 *mt9v022 = to_mt9v022(client);
+ struct v4l2_rect rect = a->c;
struct soc_camera_device *icd = client->dev.platform_data;
int ret;
+ /* Bayer format - even size lengths */
+ if (mt9v022->fourcc == V4L2_PIX_FMT_SBGGR8 ||
+ mt9v022->fourcc == V4L2_PIX_FMT_SBGGR16) {
+ rect.width = ALIGN(rect.width, 2);
+ rect.height = ALIGN(rect.height, 2);
+ /* Let the user play with the starting pixel */
+ }
+
+ soc_camera_limit_side(&rect.left, &rect.width,
+ MT9V022_COLUMN_SKIP, MT9V022_MIN_WIDTH, MT9V022_MAX_WIDTH);
+
+ soc_camera_limit_side(&rect.top, &rect.height,
+ MT9V022_ROW_SKIP, MT9V022_MIN_HEIGHT, MT9V022_MAX_HEIGHT);
+
/* Like in example app. Contradicts the datasheet though */
ret = reg_read(client, MT9V022_AEC_AGC_ENABLE);
if (ret >= 0) {
if (ret & 1) /* Autoexposure */
ret = reg_write(client, MT9V022_MAX_TOTAL_SHUTTER_WIDTH,
- rect->height + icd->y_skip_top + 43);
+ rect.height + icd->y_skip_top + 43);
else
ret = reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH,
- rect->height + icd->y_skip_top + 43);
+ rect.height + icd->y_skip_top + 43);
}
/* Setup frame format: defaults apart from width and height */
if (!ret)
- ret = reg_write(client, MT9V022_COLUMN_START, rect->left);
+ ret = reg_write(client, MT9V022_COLUMN_START, rect.left);
if (!ret)
- ret = reg_write(client, MT9V022_ROW_START, rect-&g