Hi Tommaso,
Thank you for the patch.
On Fri, Dec 15, 2023 at 09:24:50AM +0100, Tommaso Merciai wrote:
> Remove driver private data dft_fr, min_fr and max_fr.
> Those are used only in alvium_set_frame_interval function.
> Use local ones instead.
The fields are used to pass data from alvium_get_frame_interval() to its
caller, not just in alvium_get_frame_interval(). You can write
The dft_fr, min_fr and max_fr fields of the alvium_dev structure are
only used to pass results from alvium_get_frame_interval() to its
caller. Replace them with function parameters.
> Signed-off-by: Tommaso Merciai <tomm.merciai@xxxxxxxxx>
> ---
> drivers/media/i2c/alvium-csi2.c | 45 +++++++++++++++------------------
> drivers/media/i2c/alvium-csi2.h | 3 ---
> 2 files changed, 21 insertions(+), 27 deletions(-)
>
> diff --git a/drivers/media/i2c/alvium-csi2.c b/drivers/media/i2c/alvium-csi2.c
> index 34ff7fad3877..c4b7851045a1 100644
> --- a/drivers/media/i2c/alvium-csi2.c
> +++ b/drivers/media/i2c/alvium-csi2.c
> @@ -1170,40 +1170,36 @@ static int alvium_set_bayer_pattern(struct alvium_dev *alvium,
> return 0;
> }
>
> -static int alvium_get_frame_interval(struct alvium_dev *alvium)
> +static int alvium_get_frame_interval(struct alvium_dev *alvium,
> + u64 *dft_fr, u64 *min_fr, u64 *max_fr)
> {
> - u64 dft_fr, min_fr, max_fr;
> int ret = 0;
>
> alvium_read(alvium, REG_BCRM_ACQUISITION_FRAME_RATE_RW,
> - &dft_fr, &ret);
> + dft_fr, &ret);
> alvium_read(alvium, REG_BCRM_ACQUISITION_FRAME_RATE_MIN_R,
> - &min_fr, &ret);
> + min_fr, &ret);
> alvium_read(alvium, REG_BCRM_ACQUISITION_FRAME_RATE_MAX_R,
> - &max_fr, &ret);
> + max_fr, &ret);
> if (ret)
> return ret;
You can just
return ret;
>
> - alvium->dft_fr = dft_fr;
> - alvium->min_fr = min_fr;
> - alvium->max_fr = max_fr;
> -
> return 0;
> }
>
> -static int alvium_set_frame_rate(struct alvium_dev *alvium)
> +static int alvium_set_frame_rate(struct alvium_dev *alvium, u64 fr)
> {
> struct device *dev = &alvium->i2c_client->dev;
> int ret;
>
> ret = alvium_write_hshake(alvium, REG_BCRM_ACQUISITION_FRAME_RATE_RW,
> - alvium->fr);
> + fr);
This is unrelated to the commit message. Please split handling of the fr
field to a separate patch. One change, one patch.
> if (ret) {
> dev_err(dev, "Fail to set frame rate lanes reg\n");
> return ret;
> }
>
> - dev_dbg(dev, "set frame rate: %llu us\n", alvium->fr);
> + dev_dbg(dev, "set frame rate: %llu us\n", fr);
>
> return 0;
> }
> @@ -1667,36 +1663,36 @@ static int alvium_g_frame_interval(struct v4l2_subdev *sd,
> }
>
> static int alvium_set_frame_interval(struct alvium_dev *alvium,
> - struct v4l2_subdev_frame_interval *fi)
> + struct v4l2_subdev *sd,
> + struct v4l2_subdev_state *sd_state,
> + struct v4l2_subdev_frame_interval *fi,
> + u64 *req_fr)
> {
> struct device *dev = &alvium->i2c_client->dev;
> - u64 req_fr, min_fr, max_fr;
> + u64 dft_fr, min_fr, max_fr;
> int ret;
>
> if (fi->interval.denominator == 0)
> return -EINVAL;
>
> - ret = alvium_get_frame_interval(alvium);
> + ret = alvium_get_frame_interval(alvium, &dft_fr, &min_fr, &max_fr);
> if (ret) {
> dev_err(dev, "Fail to get frame interval\n");
> return ret;
> }
>
> - min_fr = alvium->min_fr;
> - max_fr = alvium->max_fr;
> -
> dev_dbg(dev, "fi->interval.numerator = %d\n",
> fi->interval.numerator);
> dev_dbg(dev, "fi->interval.denominator = %d\n",
> fi->interval.denominator);
>
> - req_fr = (u64)((fi->interval.denominator * USEC_PER_SEC) /
> + *req_fr = (u64)((fi->interval.denominator * USEC_PER_SEC) /
> fi->interval.numerator);
>
> - if (req_fr >= max_fr && req_fr <= min_fr)
> - req_fr = alvium->dft_fr;
> + if (*req_fr >= max_fr && *req_fr <= min_fr)
> + *req_fr = dft_fr;
>
> - alvium->fr = req_fr;
> + alvium->fr = *req_fr;
> alvium->frame_interval.numerator = fi->interval.numerator;
> alvium->frame_interval.denominator = fi->interval.denominator;
>
> @@ -1708,6 +1704,7 @@ static int alvium_s_frame_interval(struct v4l2_subdev *sd,
> struct v4l2_subdev_frame_interval *fi)
> {
> struct alvium_dev *alvium = sd_to_alvium(sd);
> + u64 req_fr;
> int ret;
>
> /*
> @@ -1720,9 +1717,9 @@ static int alvium_s_frame_interval(struct v4l2_subdev *sd,
> if (alvium->streaming)
> return -EBUSY;
>
> - ret = alvium_set_frame_interval(alvium, fi);
> + ret = alvium_set_frame_interval(alvium, sd, sd_state, fi, &req_fr);
> if (!ret)
> - ret = alvium_set_frame_rate(alvium);
> + ret = alvium_set_frame_rate(alvium, req_fr);
>
> return ret;
> }
> diff --git a/drivers/media/i2c/alvium-csi2.h b/drivers/media/i2c/alvium-csi2.h
> index 8b554bffdc39..a6529b28e7dd 100644
> --- a/drivers/media/i2c/alvium-csi2.h
> +++ b/drivers/media/i2c/alvium-csi2.h
> @@ -443,9 +443,6 @@ struct alvium_dev {
>
> struct alvium_mode mode;
> struct v4l2_fract frame_interval;
> - u64 dft_fr;
> - u64 min_fr;
> - u64 max_fr;
> u64 fr;
>
> u8 h_sup_csi_lanes;
--
Regards,
Laurent Pinchart
