Hi Jacopo,
Thanks for your effort.
On 2019-01-10 15:02:13 +0100, Jacopo Mondi wrote:
> When the adv748x driver is informed about a link being created from HDMI or
> AFE to a CSI-2 TX output, the 'link_setup()' callback is invoked. Make
> sure to implement proper routing management at link setup time, to route
> the selected video stream to the desired TX output.
>
> Signed-off-by: Jacopo Mondi <jacopo+renesas@xxxxxxxxxx>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@xxxxxxxxxxxx>
> ---
> drivers/media/i2c/adv748x/adv748x-core.c | 48 +++++++++++++++++++++++-
> drivers/media/i2c/adv748x/adv748x.h | 2 +
> 2 files changed, 49 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/media/i2c/adv748x/adv748x-core.c b/drivers/media/i2c/adv748x/adv748x-core.c
> index 200e00f93546..ea7e5ca48f1a 100644
> --- a/drivers/media/i2c/adv748x/adv748x-core.c
> +++ b/drivers/media/i2c/adv748x/adv748x-core.c
> @@ -335,6 +335,51 @@ int adv748x_tx_power(struct adv748x_csi2 *tx, bool on)
> /* -----------------------------------------------------------------------------
> * Media Operations
> */
> +static int adv748x_link_setup(struct media_entity *entity,
> + const struct media_pad *local,
> + const struct media_pad *remote, u32 flags)
> +{
> + struct v4l2_subdev *rsd = media_entity_to_v4l2_subdev(remote->entity);
> + struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
> + struct adv748x_state *state = v4l2_get_subdevdata(sd);
> + struct adv748x_csi2 *tx = adv748x_sd_to_csi2(sd);
> + bool enable = flags & MEDIA_LNK_FL_ENABLED;
> + u8 io10_mask = ADV748X_IO_10_CSI1_EN |
> + ADV748X_IO_10_CSI4_EN |
> + ADV748X_IO_10_CSI4_IN_SEL_AFE;
> + u8 io10 = 0;
> +
> + /* Refuse to enable multiple links to the same TX at the same time. */
> + if (enable && tx->src)
> + return -EINVAL;
> +
> + /* Set or clear the source (HDMI or AFE) and the current TX. */
> + if (rsd == &state->afe.sd)
> + state->afe.tx = enable ? tx : NULL;
> + else
> + state->hdmi.tx = enable ? tx : NULL;
> +
> + tx->src = enable ? rsd : NULL;
> +
> + if (state->afe.tx) {
> + /* AFE Requires TXA enabled, even when output to TXB */
> + io10 |= ADV748X_IO_10_CSI4_EN;
> + if (is_txa(tx))
> + io10 |= ADV748X_IO_10_CSI4_IN_SEL_AFE;
> + else
> + io10 |= ADV748X_IO_10_CSI1_EN;
> + }
> +
> + if (state->hdmi.tx)
> + io10 |= ADV748X_IO_10_CSI4_EN;
> +
> + return io_clrset(state, ADV748X_IO_10, io10_mask, io10);
> +}
> +
> +static const struct media_entity_operations adv748x_tx_media_ops = {
> + .link_setup = adv748x_link_setup,
> + .link_validate = v4l2_subdev_link_validate,
> +};
>
> static const struct media_entity_operations adv748x_media_ops = {
> .link_validate = v4l2_subdev_link_validate,
> @@ -516,7 +561,8 @@ void adv748x_subdev_init(struct v4l2_subdev *sd, struct adv748x_state *state,
> state->client->addr, ident);
>
> sd->entity.function = function;
> - sd->entity.ops = &adv748x_media_ops;
> + sd->entity.ops = is_tx(adv748x_sd_to_csi2(sd)) ?
> + &adv748x_tx_media_ops : &adv748x_media_ops;
> }
>
> static int adv748x_parse_csi2_lanes(struct adv748x_state *state,
> diff --git a/drivers/media/i2c/adv748x/adv748x.h b/drivers/media/i2c/adv748x/adv748x.h
> index 934a9d9a75c8..b00c1995efb0 100644
> --- a/drivers/media/i2c/adv748x/adv748x.h
> +++ b/drivers/media/i2c/adv748x/adv748x.h
> @@ -94,6 +94,7 @@ struct adv748x_csi2 {
> #define is_tx_enabled(_tx) ((_tx)->state->endpoints[(_tx)->port] != NULL)
> #define is_txa(_tx) ((_tx) == &(_tx)->state->txa)
> #define is_txb(_tx) ((_tx) == &(_tx)->state->txb)
> +#define is_tx(_tx) (is_txa(_tx) || is_txb(_tx))
>
> #define is_afe_enabled(_state) \
> ((_state)->endpoints[ADV748X_PORT_AIN0] != NULL || \
> @@ -223,6 +224,7 @@ struct adv748x_state {
> #define ADV748X_IO_10_CSI4_EN BIT(7)
> #define ADV748X_IO_10_CSI1_EN BIT(6)
> #define ADV748X_IO_10_PIX_OUT_EN BIT(5)
> +#define ADV748X_IO_10_CSI4_IN_SEL_AFE BIT(3)
>
> #define ADV748X_IO_CHIP_REV_ID_1 0xdf
> #define ADV748X_IO_CHIP_REV_ID_2 0xe0
> --
> 2.20.1
>
--
Regards,
Niklas Söderlund
