Hi Roman, Sakari
On Tue, May 19, 2020 at 02:57:07PM +0300, Sakari Ailus wrote:
> Hi Roman,
>
> On Tue, May 19, 2020 at 04:16:18AM +0300, Roman Kovalivskyi wrote:
> > From: Dave Stevenson <dave.stevenson@xxxxxxxxxxxxxxx>
> >
> > The driver was only supporting continuous clock mode
> > although this was not stated anywhere.
> > Non-continuous clock saves a small amount of power and
> > on some SoCs is easier to interface with.
> >
not much to add to what Sakari said, apart for
> > Signed-off-by: Dave Stevenson <dave.stevenson@xxxxxxxxxxxxxxx>
> > Signed-off-by: Roman Kovalivskyi <roman.kovalivskyi@xxxxxxxxxxxxxxx>
> > ---
> > drivers/media/i2c/ov5647.c | 25 ++++++++++++++++++++++---
> > 1 file changed, 22 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/media/i2c/ov5647.c b/drivers/media/i2c/ov5647.c
> > index 796cc80f8ee1..10f35c637f91 100644
> > --- a/drivers/media/i2c/ov5647.c
> > +++ b/drivers/media/i2c/ov5647.c
> > @@ -44,6 +44,7 @@
> > #define PWDN_ACTIVE_DELAY_MS 20
> >
> > #define MIPI_CTRL00_CLOCK_LANE_GATE BIT(5)
> > +#define MIPI_CTRL00_LINE_SYNC_ENABLE BIT(4)
> > #define MIPI_CTRL00_BUS_IDLE BIT(2)
> > #define MIPI_CTRL00_CLOCK_LANE_DISABLE BIT(0)
> >
> > @@ -95,6 +96,7 @@ struct ov5647 {
> > int power_count;
> > struct clk *xclk;
> > struct gpio_desc *pwdn;
> > + bool is_clock_contiguous;
the clock is 'continuous' not contigous :)
I plan to upport more ov5647 patches soon, Roman are you planning a
resend of this series or should I do so (keeping your signoffs of
course)
Thanks
j
> > };
> >
> > static inline struct ov5647 *to_state(struct v4l2_subdev *sd)
> > @@ -274,9 +276,15 @@ static int ov5647_set_virtual_channel(struct v4l2_subdev *sd, int channel)
> >
> > static int ov5647_stream_on(struct v4l2_subdev *sd)
> > {
> > + struct ov5647 *ov5647 = to_state(sd);
> > + u8 val = MIPI_CTRL00_BUS_IDLE;
> > int ret;
> >
> > - ret = ov5647_write(sd, OV5647_REG_MIPI_CTRL00, MIPI_CTRL00_BUS_IDLE);
> > + if (ov5647->is_clock_contiguous)
> > + val |= MIPI_CTRL00_CLOCK_LANE_GATE |
> > + MIPI_CTRL00_LINE_SYNC_ENABLE;
> > +
> > + ret = ov5647_write(sd, OV5647_REG_MIPI_CTRL00, val);
> > if (ret < 0)
> > return ret;
> >
> > @@ -573,7 +581,7 @@ static const struct v4l2_subdev_internal_ops ov5647_subdev_internal_ops = {
> > .open = ov5647_open,
> > };
> >
> > -static int ov5647_parse_dt(struct device_node *np)
> > +static int ov5647_parse_dt(struct ov5647 *sensor, struct device_node *np)
> > {
> > struct v4l2_fwnode_endpoint bus_cfg = { .bus_type = 0 };
> > struct device_node *ep;
> > @@ -586,6 +594,17 @@ static int ov5647_parse_dt(struct device_node *np)
> >
> > ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(ep), &bus_cfg);
> >
>
> Extra newline.
>
> > + if (!ret) {
> > + of_node_put(ep);
> > + of_node_put(np);
>
> Why to put np as well?
>
> > + return ret;
>
> Please add a label at the end; it makes error handling easier.
>
> > + }
> > +
> > + if (bus_cfg.bus_type == V4L2_MBUS_CSI2_DPHY
> > + || bus_cfg.bus_type == V4L2_MBUS_CSI2_CPHY)
>
> I bet this device is D-PHY only.
>
> > + sensor->is_clock_contiguous = bus_cfg.bus.mipi_csi2.flags
> > + & V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK;
>
> Now that you're making use of bus specific parameters, please set the bus
> type first before calling v4l2_fwnode_endpoint_parse().
>
> > +
> > of_node_put(ep);
> > return ret;
> > }
> > @@ -604,7 +623,7 @@ static int ov5647_probe(struct i2c_client *client)
> > return -ENOMEM;
> >
> > if (IS_ENABLED(CONFIG_OF) && np) {
> > - ret = ov5647_parse_dt(np);
> > + ret = ov5647_parse_dt(sensor, np);
> > if (ret) {
> > dev_err(dev, "DT parsing error: %d\n", ret);
> > return ret;
>
> --
> Kind regards,
>
> Sakari Ailus
