Hi Roman,
On Mon, Jun 22, 2020 at 10:00:46AM +0300, Roman Kovalivskyi wrote:
> Hi Jacopo,
>
> On 18.06.20 13:13, Jacopo Mondi wrote:
> > 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
>
> I would be grateful if someone more competent would continue with this
> patch series, so feel free to update it with v3.
I think you did a very good job, I just happen to have a bit more time
to dedicate to this.
I'll make sure I'll cc you and the cc list from your series.
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
>
>
> --
>
> Best regards,
> Roman Kovalivskyi
>
