This patch set is to add the media entity pads initialization,
the s_power operation and get_fmt callback support.
Changes in v3:
- Keep tried format info in the try_fmt member of
v4l2_subdev__pad_config struct.
- Add the internal_ops callback to set default format.
Changes in v2:
- Add the patch to support the get_fmt ops.
- Remove the redundant invoking ov7670_init_gpio().
Wenyou Yang (3):
media: ov7670: Add entity pads initialization
media: ov7670: Add the get_fmt callback
media: ov7670: Add the s_power operation
drivers/media/i2c/ov7670.c | 103 ++++++++++++++++++++++++++++++++++++++++++---
1 file changed, 96 insertions(+), 7 deletions(-)
--
2.13.0
Add the media entity pads initialization.
Signed-off-by: Wenyou Yang <[email protected]>
---
Changes in v3: None
Changes in v2: None
drivers/media/i2c/ov7670.c | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/drivers/media/i2c/ov7670.c b/drivers/media/i2c/ov7670.c
index e88549f0e704..5c8460ee65c3 100644
--- a/drivers/media/i2c/ov7670.c
+++ b/drivers/media/i2c/ov7670.c
@@ -213,6 +213,7 @@ struct ov7670_devtype {
struct ov7670_format_struct; /* coming later */
struct ov7670_info {
struct v4l2_subdev sd;
+ struct media_pad pad;
struct v4l2_ctrl_handler hdl;
struct {
/* gain cluster */
@@ -1688,14 +1689,23 @@ static int ov7670_probe(struct i2c_client *client,
v4l2_ctrl_auto_cluster(2, &info->auto_exposure,
V4L2_EXPOSURE_MANUAL, false);
v4l2_ctrl_cluster(2, &info->saturation);
+
+ info->pad.flags = MEDIA_PAD_FL_SOURCE;
+ info->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
+ ret = media_entity_pads_init(&info->sd.entity, 1, &info->pad);
+ if (ret < 0)
+ goto hdl_free;
+
v4l2_ctrl_handler_setup(&info->hdl);
ret = v4l2_async_register_subdev(&info->sd);
if (ret < 0)
- goto hdl_free;
+ goto entity_cleanup;
return 0;
+entity_cleanup:
+ media_entity_cleanup(&info->sd.entity);
hdl_free:
v4l2_ctrl_handler_free(&info->hdl);
clk_disable:
@@ -1712,6 +1722,7 @@ static int ov7670_remove(struct i2c_client *client)
v4l2_device_unregister_subdev(sd);
v4l2_ctrl_handler_free(&info->hdl);
clk_disable_unprepare(info->clk);
+ media_entity_cleanup(&info->sd.entity);
return 0;
}
--
2.13.0
Add the get_fmt callback, also enable V4L2_SUBDEV_FL_HAS_DEVNODE flag
to make this subdev has device node.
Signed-off-by: Wenyou Yang <[email protected]>
---
Changes in v3:
- Keep tried format info in the try_fmt member of
v4l2_subdev__pad_config struct.
- Add the internal_ops callback to set default format.
Changes in v2: None
drivers/media/i2c/ov7670.c | 58 +++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 57 insertions(+), 1 deletion(-)
diff --git a/drivers/media/i2c/ov7670.c b/drivers/media/i2c/ov7670.c
index 5c8460ee65c3..5d6f1859a39b 100644
--- a/drivers/media/i2c/ov7670.c
+++ b/drivers/media/i2c/ov7670.c
@@ -230,6 +230,7 @@ struct ov7670_info {
struct v4l2_ctrl *saturation;
struct v4l2_ctrl *hue;
};
+ struct v4l2_mbus_framefmt format;
struct ov7670_format_struct *fmt; /* Current format */
struct clk *clk;
struct gpio_desc *resetb_gpio;
@@ -973,6 +974,9 @@ static int ov7670_try_fmt_internal(struct v4l2_subdev *sd,
fmt->width = wsize->width;
fmt->height = wsize->height;
fmt->colorspace = ov7670_formats[index].colorspace;
+
+ info->format = *fmt;
+
return 0;
}
@@ -986,6 +990,7 @@ static int ov7670_set_fmt(struct v4l2_subdev *sd,
struct ov7670_format_struct *ovfmt;
struct ov7670_win_size *wsize;
struct ov7670_info *info = to_state(sd);
+ struct v4l2_mbus_framefmt *mbus_fmt;
unsigned char com7;
int ret;
@@ -996,7 +1001,8 @@ static int ov7670_set_fmt(struct v4l2_subdev *sd,
ret = ov7670_try_fmt_internal(sd, &format->format, NULL, NULL);
if (ret)
return ret;
- cfg->try_fmt = format->format;
+ mbus_fmt = v4l2_subdev_get_try_format(sd, cfg, format->pad);
+ *mbus_fmt = format->format;
return 0;
}
@@ -1039,6 +1045,23 @@ static int ov7670_set_fmt(struct v4l2_subdev *sd,
return 0;
}
+static int ov7670_get_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *format)
+{
+ struct ov7670_info *info = to_state(sd);
+ struct v4l2_mbus_framefmt *mbus_fmt;
+
+ if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
+ mbus_fmt = v4l2_subdev_get_try_format(sd, cfg, 0);
+ format->format = *mbus_fmt;
+ } else {
+ format->format = info->format;
+ }
+
+ return 0;
+}
+
/*
* Implement G/S_PARM. There is a "high quality" mode we could try
* to do someday; for now, we just do the frame rate tweak.
@@ -1506,6 +1529,28 @@ static int ov7670_s_register(struct v4l2_subdev *sd, const struct v4l2_dbg_regis
}
#endif
+static void ov7670_get_default_format(struct v4l2_subdev *sd,
+ struct v4l2_mbus_framefmt *format)
+{
+ struct ov7670_info *info = to_state(sd);
+
+ format->width = info->devtype->win_sizes[0].width;
+ format->height = info->devtype->win_sizes[0].height;
+ format->colorspace = info->fmt->colorspace;
+ format->code = info->fmt->mbus_code;
+ format->field = V4L2_FIELD_NONE;
+}
+
+static int ov7670_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
+{
+ struct v4l2_mbus_framefmt *format =
+ v4l2_subdev_get_try_format(sd, fh->pad, 0);
+
+ ov7670_get_default_format(sd, format);
+
+ return 0;
+}
+
/* ----------------------------------------------------------------------- */
static const struct v4l2_subdev_core_ops ov7670_core_ops = {
@@ -1526,6 +1571,7 @@ static const struct v4l2_subdev_pad_ops ov7670_pad_ops = {
.enum_frame_interval = ov7670_enum_frame_interval,
.enum_frame_size = ov7670_enum_frame_size,
.enum_mbus_code = ov7670_enum_mbus_code,
+ .get_fmt = ov7670_get_fmt,
.set_fmt = ov7670_set_fmt,
};
@@ -1535,6 +1581,10 @@ static const struct v4l2_subdev_ops ov7670_ops = {
.pad = &ov7670_pad_ops,
};
+static const struct v4l2_subdev_internal_ops ov7670_subdev_internal_ops = {
+ .open = ov7670_open,
+};
+
/* ----------------------------------------------------------------------- */
static const struct ov7670_devtype ov7670_devdata[] = {
@@ -1587,6 +1637,9 @@ static int ov7670_probe(struct i2c_client *client,
sd = &info->sd;
v4l2_i2c_subdev_init(sd, client, &ov7670_ops);
+ sd->internal_ops = &ov7670_subdev_internal_ops;
+ sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+
info->clock_speed = 30; /* default: a guess */
if (client->dev.platform_data) {
struct ov7670_config *config = client->dev.platform_data;
@@ -1643,6 +1696,9 @@ static int ov7670_probe(struct i2c_client *client,
info->devtype = &ov7670_devdata[id->driver_data];
info->fmt = &ov7670_formats[0];
+
+ ov7670_get_default_format(sd, &info->format);
+
info->clkrc = 0;
/* Set default frame rate to 30 fps */
--
2.13.0
Add the s_power operation which is responsible for manipulating the
power dowm mode through the PWDN pin and the reset operation through
the RESET pin.
Signed-off-by: Wenyou Yang <[email protected]>
---
Changes in v3: None
Changes in v2:
- Add the patch to support the get_fmt ops.
- Remove the redundant invoking ov7670_init_gpio().
drivers/media/i2c/ov7670.c | 32 +++++++++++++++++++++++++++-----
1 file changed, 27 insertions(+), 5 deletions(-)
diff --git a/drivers/media/i2c/ov7670.c b/drivers/media/i2c/ov7670.c
index 5d6f1859a39b..66b9bf2111f7 100644
--- a/drivers/media/i2c/ov7670.c
+++ b/drivers/media/i2c/ov7670.c
@@ -1529,6 +1529,22 @@ static int ov7670_s_register(struct v4l2_subdev *sd, const struct v4l2_dbg_regis
}
#endif
+static int ov7670_s_power(struct v4l2_subdev *sd, int on)
+{
+ struct ov7670_info *info = to_state(sd);
+
+ if (info->pwdn_gpio)
+ gpiod_direction_output(info->pwdn_gpio, !on);
+ if (on && info->resetb_gpio) {
+ gpiod_set_value(info->resetb_gpio, 1);
+ usleep_range(500, 1000);
+ gpiod_set_value(info->resetb_gpio, 0);
+ usleep_range(3000, 5000);
+ }
+
+ return 0;
+}
+
static void ov7670_get_default_format(struct v4l2_subdev *sd,
struct v4l2_mbus_framefmt *format)
{
@@ -1560,6 +1576,7 @@ static const struct v4l2_subdev_core_ops ov7670_core_ops = {
.g_register = ov7670_g_register,
.s_register = ov7670_s_register,
#endif
+ .s_power = ov7670_s_power,
};
static const struct v4l2_subdev_video_ops ov7670_video_ops = {
@@ -1673,23 +1690,25 @@ static int ov7670_probe(struct i2c_client *client,
if (ret)
return ret;
- ret = ov7670_init_gpio(client, info);
- if (ret)
- goto clk_disable;
-
info->clock_speed = clk_get_rate(info->clk) / 1000000;
if (info->clock_speed < 10 || info->clock_speed > 48) {
ret = -EINVAL;
goto clk_disable;
}
+ ret = ov7670_init_gpio(client, info);
+ if (ret)
+ goto clk_disable;
+
+ ov7670_s_power(sd, 1);
+
/* Make sure it's an ov7670 */
ret = ov7670_detect(sd);
if (ret) {
v4l_dbg(1, debug, client,
"chip found @ 0x%x (%s) is not an ov7670 chip.\n",
client->addr << 1, client->adapter->name);
- goto clk_disable;
+ goto power_off;
}
v4l_info(client, "chip found @ 0x%02x (%s)\n",
client->addr << 1, client->adapter->name);
@@ -1764,6 +1783,8 @@ static int ov7670_probe(struct i2c_client *client,
media_entity_cleanup(&info->sd.entity);
hdl_free:
v4l2_ctrl_handler_free(&info->hdl);
+power_off:
+ ov7670_s_power(sd, 0);
clk_disable:
clk_disable_unprepare(info->clk);
return ret;
@@ -1779,6 +1800,7 @@ static int ov7670_remove(struct i2c_client *client)
v4l2_ctrl_handler_free(&info->hdl);
clk_disable_unprepare(info->clk);
media_entity_cleanup(&info->sd.entity);
+ ov7670_s_power(sd, 0);
return 0;
}
--
2.13.0
Hi Wenyou,
[auto build test ERROR on linuxtv-media/master]
[also build test ERROR on v4.14-rc1 next-20170915]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Wenyou-Yang/media-ov7670-Add-entity-init-and-power-operation/20170918-093913
base: git://linuxtv.org/media_tree.git master
config: i386-randconfig-x009-09180108 (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
# save the attached .config to linux build tree
make ARCH=i386
All errors (new ones prefixed by >>):
drivers/media/i2c/ov7670.c: In function 'ov7670_probe':
>> drivers/media/i2c/ov7670.c:1694:10: error: 'struct v4l2_subdev' has no member named 'entity'
info->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
^
drivers/media/i2c/ov7670.c:1695:40: error: 'struct v4l2_subdev' has no member named 'entity'
ret = media_entity_pads_init(&info->sd.entity, 1, &info->pad);
^
drivers/media/i2c/ov7670.c:1708:32: error: 'struct v4l2_subdev' has no member named 'entity'
media_entity_cleanup(&info->sd.entity);
^
drivers/media/i2c/ov7670.c: In function 'ov7670_remove':
drivers/media/i2c/ov7670.c:1725:32: error: 'struct v4l2_subdev' has no member named 'entity'
media_entity_cleanup(&info->sd.entity);
^
vim +1694 drivers/media/i2c/ov7670.c
1575
1576 static int ov7670_probe(struct i2c_client *client,
1577 const struct i2c_device_id *id)
1578 {
1579 struct v4l2_fract tpf;
1580 struct v4l2_subdev *sd;
1581 struct ov7670_info *info;
1582 int ret;
1583
1584 info = devm_kzalloc(&client->dev, sizeof(*info), GFP_KERNEL);
1585 if (info == NULL)
1586 return -ENOMEM;
1587 sd = &info->sd;
1588 v4l2_i2c_subdev_init(sd, client, &ov7670_ops);
1589
1590 info->clock_speed = 30; /* default: a guess */
1591 if (client->dev.platform_data) {
1592 struct ov7670_config *config = client->dev.platform_data;
1593
1594 /*
1595 * Must apply configuration before initializing device, because it
1596 * selects I/O method.
1597 */
1598 info->min_width = config->min_width;
1599 info->min_height = config->min_height;
1600 info->use_smbus = config->use_smbus;
1601
1602 if (config->clock_speed)
1603 info->clock_speed = config->clock_speed;
1604
1605 /*
1606 * It should be allowed for ov7670 too when it is migrated to
1607 * the new frame rate formula.
1608 */
1609 if (config->pll_bypass && id->driver_data != MODEL_OV7670)
1610 info->pll_bypass = true;
1611
1612 if (config->pclk_hb_disable)
1613 info->pclk_hb_disable = true;
1614 }
1615
1616 info->clk = devm_clk_get(&client->dev, "xclk");
1617 if (IS_ERR(info->clk))
1618 return PTR_ERR(info->clk);
1619 ret = clk_prepare_enable(info->clk);
1620 if (ret)
1621 return ret;
1622
1623 ret = ov7670_init_gpio(client, info);
1624 if (ret)
1625 goto clk_disable;
1626
1627 info->clock_speed = clk_get_rate(info->clk) / 1000000;
1628 if (info->clock_speed < 10 || info->clock_speed > 48) {
1629 ret = -EINVAL;
1630 goto clk_disable;
1631 }
1632
1633 /* Make sure it's an ov7670 */
1634 ret = ov7670_detect(sd);
1635 if (ret) {
1636 v4l_dbg(1, debug, client,
1637 "chip found @ 0x%x (%s) is not an ov7670 chip.\n",
1638 client->addr << 1, client->adapter->name);
1639 goto clk_disable;
1640 }
1641 v4l_info(client, "chip found @ 0x%02x (%s)\n",
1642 client->addr << 1, client->adapter->name);
1643
1644 info->devtype = &ov7670_devdata[id->driver_data];
1645 info->fmt = &ov7670_formats[0];
1646 info->clkrc = 0;
1647
1648 /* Set default frame rate to 30 fps */
1649 tpf.numerator = 1;
1650 tpf.denominator = 30;
1651 info->devtype->set_framerate(sd, &tpf);
1652
1653 if (info->pclk_hb_disable)
1654 ov7670_write(sd, REG_COM10, COM10_PCLK_HB);
1655
1656 v4l2_ctrl_handler_init(&info->hdl, 10);
1657 v4l2_ctrl_new_std(&info->hdl, &ov7670_ctrl_ops,
1658 V4L2_CID_BRIGHTNESS, 0, 255, 1, 128);
1659 v4l2_ctrl_new_std(&info->hdl, &ov7670_ctrl_ops,
1660 V4L2_CID_CONTRAST, 0, 127, 1, 64);
1661 v4l2_ctrl_new_std(&info->hdl, &ov7670_ctrl_ops,
1662 V4L2_CID_VFLIP, 0, 1, 1, 0);
1663 v4l2_ctrl_new_std(&info->hdl, &ov7670_ctrl_ops,
1664 V4L2_CID_HFLIP, 0, 1, 1, 0);
1665 info->saturation = v4l2_ctrl_new_std(&info->hdl, &ov7670_ctrl_ops,
1666 V4L2_CID_SATURATION, 0, 256, 1, 128);
1667 info->hue = v4l2_ctrl_new_std(&info->hdl, &ov7670_ctrl_ops,
1668 V4L2_CID_HUE, -180, 180, 5, 0);
1669 info->gain = v4l2_ctrl_new_std(&info->hdl, &ov7670_ctrl_ops,
1670 V4L2_CID_GAIN, 0, 255, 1, 128);
1671 info->auto_gain = v4l2_ctrl_new_std(&info->hdl, &ov7670_ctrl_ops,
1672 V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
1673 info->exposure = v4l2_ctrl_new_std(&info->hdl, &ov7670_ctrl_ops,
1674 V4L2_CID_EXPOSURE, 0, 65535, 1, 500);
1675 info->auto_exposure = v4l2_ctrl_new_std_menu(&info->hdl, &ov7670_ctrl_ops,
1676 V4L2_CID_EXPOSURE_AUTO, V4L2_EXPOSURE_MANUAL, 0,
1677 V4L2_EXPOSURE_AUTO);
1678 sd->ctrl_handler = &info->hdl;
1679 if (info->hdl.error) {
1680 ret = info->hdl.error;
1681
1682 goto hdl_free;
1683 }
1684 /*
1685 * We have checked empirically that hw allows to read back the gain
1686 * value chosen by auto gain but that's not the case for auto exposure.
1687 */
1688 v4l2_ctrl_auto_cluster(2, &info->auto_gain, 0, true);
1689 v4l2_ctrl_auto_cluster(2, &info->auto_exposure,
1690 V4L2_EXPOSURE_MANUAL, false);
1691 v4l2_ctrl_cluster(2, &info->saturation);
1692
1693 info->pad.flags = MEDIA_PAD_FL_SOURCE;
> 1694 info->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
1695 ret = media_entity_pads_init(&info->sd.entity, 1, &info->pad);
1696 if (ret < 0)
1697 goto hdl_free;
1698
1699 v4l2_ctrl_handler_setup(&info->hdl);
1700
1701 ret = v4l2_async_register_subdev(&info->sd);
1702 if (ret < 0)
1703 goto entity_cleanup;
1704
1705 return 0;
1706
1707 entity_cleanup:
1708 media_entity_cleanup(&info->sd.entity);
1709 hdl_free:
1710 v4l2_ctrl_handler_free(&info->hdl);
1711 clk_disable:
1712 clk_disable_unprepare(info->clk);
1713 return ret;
1714 }
1715
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
Hi Wenyou,
[auto build test ERROR on linuxtv-media/master]
[also build test ERROR on v4.14-rc1 next-20170915]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Wenyou-Yang/media-ov7670-Add-entity-init-and-power-operation/20170918-093913
base: git://linuxtv.org/media_tree.git master
config: i386-randconfig-x009-09180108 (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
# save the attached .config to linux build tree
make ARCH=i386
All error/warnings (new ones prefixed by >>):
drivers/media//i2c/ov7670.c: In function 'ov7670_set_fmt':
>> drivers/media//i2c/ov7670.c:1004:14: error: implicit declaration of function 'v4l2_subdev_get_try_format' [-Werror=implicit-function-declaration]
mbus_fmt = v4l2_subdev_get_try_format(sd, cfg, format->pad);
^~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/media//i2c/ov7670.c:1004:12: warning: assignment makes pointer from integer without a cast [-Wint-conversion]
mbus_fmt = v4l2_subdev_get_try_format(sd, cfg, format->pad);
^
drivers/media//i2c/ov7670.c: In function 'ov7670_get_fmt':
drivers/media//i2c/ov7670.c:1056:12: warning: assignment makes pointer from integer without a cast [-Wint-conversion]
mbus_fmt = v4l2_subdev_get_try_format(sd, cfg, 0);
^
drivers/media//i2c/ov7670.c: In function 'ov7670_open':
>> drivers/media//i2c/ov7670.c:1547:38: error: 'struct v4l2_subdev_fh' has no member named 'pad'
v4l2_subdev_get_try_format(sd, fh->pad, 0);
^~
drivers/media//i2c/ov7670.c: In function 'ov7670_probe':
drivers/media//i2c/ov7670.c:1750:10: error: 'struct v4l2_subdev' has no member named 'entity'
info->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
^
drivers/media//i2c/ov7670.c:1751:40: error: 'struct v4l2_subdev' has no member named 'entity'
ret = media_entity_pads_init(&info->sd.entity, 1, &info->pad);
^
drivers/media//i2c/ov7670.c:1764:32: error: 'struct v4l2_subdev' has no member named 'entity'
media_entity_cleanup(&info->sd.entity);
^
drivers/media//i2c/ov7670.c: In function 'ov7670_remove':
drivers/media//i2c/ov7670.c:1781:32: error: 'struct v4l2_subdev' has no member named 'entity'
media_entity_cleanup(&info->sd.entity);
^
cc1: some warnings being treated as errors
vim +/v4l2_subdev_get_try_format +1004 drivers/media//i2c/ov7670.c
982
983 /*
984 * Set a format.
985 */
986 static int ov7670_set_fmt(struct v4l2_subdev *sd,
987 struct v4l2_subdev_pad_config *cfg,
988 struct v4l2_subdev_format *format)
989 {
990 struct ov7670_format_struct *ovfmt;
991 struct ov7670_win_size *wsize;
992 struct ov7670_info *info = to_state(sd);
993 struct v4l2_mbus_framefmt *mbus_fmt;
994 unsigned char com7;
995 int ret;
996
997 if (format->pad)
998 return -EINVAL;
999
1000 if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
1001 ret = ov7670_try_fmt_internal(sd, &format->format, NULL, NULL);
1002 if (ret)
1003 return ret;
> 1004 mbus_fmt = v4l2_subdev_get_try_format(sd, cfg, format->pad);
1005 *mbus_fmt = format->format;
1006 return 0;
1007 }
1008
1009 ret = ov7670_try_fmt_internal(sd, &format->format, &ovfmt, &wsize);
1010
1011 if (ret)
1012 return ret;
1013 /*
1014 * COM7 is a pain in the ass, it doesn't like to be read then
1015 * quickly written afterward. But we have everything we need
1016 * to set it absolutely here, as long as the format-specific
1017 * register sets list it first.
1018 */
1019 com7 = ovfmt->regs[0].value;
1020 com7 |= wsize->com7_bit;
1021 ov7670_write(sd, REG_COM7, com7);
1022 /*
1023 * Now write the rest of the array. Also store start/stops
1024 */
1025 ov7670_write_array(sd, ovfmt->regs + 1);
1026 ov7670_set_hw(sd, wsize->hstart, wsize->hstop, wsize->vstart,
1027 wsize->vstop);
1028 ret = 0;
1029 if (wsize->regs)
1030 ret = ov7670_write_array(sd, wsize->regs);
1031 info->fmt = ovfmt;
1032
1033 /*
1034 * If we're running RGB565, we must rewrite clkrc after setting
1035 * the other parameters or the image looks poor. If we're *not*
1036 * doing RGB565, we must not rewrite clkrc or the image looks
1037 * *really* poor.
1038 *
1039 * (Update) Now that we retain clkrc state, we should be able
1040 * to write it unconditionally, and that will make the frame
1041 * rate persistent too.
1042 */
1043 if (ret == 0)
1044 ret = ov7670_write(sd, REG_CLKRC, info->clkrc);
1045 return 0;
1046 }
1047
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0-DAY kernel test infrastructure Open Source Technology Center
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