Hi Jacopo,
On 11/12/2018 15:16, Jacopo Mondi wrote:
> The power_up_tx() procedure needs to set a few registers conditionally to
> the selected video source, but it currently checks for the provided tx to
> be either TXA or TXB.
>
> With the introduction of dynamic routing between HDMI and AFE entities to
> TXA, checking which TX the function is operating on is not meaningful anymore.
>
> To fix this, store the subdevice of the source providing video data to the
> CSI-2 TX in the 'struct adv748x_csi2' representing the TX and check on it.
>
> Signed-off-by: Jacopo Mondi <jacopo+renesas@xxxxxxxxxx>
> ---
> drivers/media/i2c/adv748x/adv748x-core.c | 2 +-
> drivers/media/i2c/adv748x/adv748x-csi2.c | 3 +++
> drivers/media/i2c/adv748x/adv748x.h | 1 +
> 3 files changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/media/i2c/adv748x/adv748x-core.c b/drivers/media/i2c/adv748x/adv748x-core.c
> index 5495dc7891e8..f3aabbccdfb5 100644
> --- a/drivers/media/i2c/adv748x/adv748x-core.c
> +++ b/drivers/media/i2c/adv748x/adv748x-core.c
> @@ -254,7 +254,7 @@ static int adv748x_power_up_tx(struct adv748x_csi2 *tx)
> adv748x_write_check(state, page, 0x00, 0xa0 | tx->num_lanes, &ret);
>
> /* ADI Required Write */
> - if (is_txa(tx)) {
> + if (tx->rsd == &state->hdmi.sd) {
rsd? I presume this means 'remote subdevice' here?
I feel like 'src' is more meaningful here ... perhaps this could read
(tx->src == &state->hdmi.sd)
Is that more understandable?
> adv748x_write_check(state, page, 0xdb, 0x10, &ret);
> adv748x_write_check(state, page, 0xd6, 0x07, &ret);
> } else {
> diff --git a/drivers/media/i2c/adv748x/adv748x-csi2.c b/drivers/media/i2c/adv748x/adv748x-csi2.c
> index 4d1aefc2c8d0..307966f4c736 100644
> --- a/drivers/media/i2c/adv748x/adv748x-csi2.c
> +++ b/drivers/media/i2c/adv748x/adv748x-csi2.c
> @@ -46,6 +46,9 @@ static int adv748x_csi2_register_link(struct adv748x_csi2 *tx,
> return ret;
> }
>
> + if (flags & MEDIA_LNK_FL_ENABLED)
> + tx->rsd = src;
Is this easy to clear when the link changes?
(I'll find out in a later patch I guess)
> +
> return media_create_pad_link(&src->entity, src_pad,
> &tx->sd.entity, ADV748X_CSI2_SINK,
> flags);
> diff --git a/drivers/media/i2c/adv748x/adv748x.h b/drivers/media/i2c/adv748x/adv748x.h
> index b482c7fe6957..387002d6da65 100644
> --- a/drivers/media/i2c/adv748x/adv748x.h
> +++ b/drivers/media/i2c/adv748x/adv748x.h
> @@ -85,6 +85,7 @@ struct adv748x_csi2 {
> struct v4l2_ctrl_handler ctrl_hdl;
> struct v4l2_ctrl *pixel_rate;
> struct v4l2_subdev sd;
> + struct v4l2_subdev *rsd;
> };
>
> #define notifier_to_csi2(n) container_of(n, struct adv748x_csi2, notifier)
>
--
Regards
--
Kieran
