Hi Prashant,
On Thu, Jun 09, 2022 at 06:09:44PM +0000, Prashant Malani wrote:
> Parse the "switches" node, if available, and count and store the number
> of Type-C switches within it. Since we currently don't do anything with
> this info, no functional changes are expected from this change.
>
> This patch sets a foundation for the actual registering of Type-C
> switches with the Type-C connector class framework.
>
> Signed-off-by: Prashant Malani <pmal...@chromium.org>
> ---
>
> Changes since v1:
> - No changes.
>
> drivers/gpu/drm/bridge/analogix/anx7625.c | 20 ++++++++++++++++++++
> drivers/gpu/drm/bridge/analogix/anx7625.h | 1 +
> 2 files changed, 21 insertions(+)
>
> diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c
> b/drivers/gpu/drm/bridge/analogix/anx7625.c
> index 53a5da6c49dd..07ed44c6b839 100644
> --- a/drivers/gpu/drm/bridge/analogix/anx7625.c
> +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
> @@ -2581,6 +2581,22 @@ static void anx7625_runtime_disable(void *data)
> pm_runtime_disable(data);
> }
>
> +static int anx7625_register_typec_switches(struct device *device, struct
> anx7625_data *ctx)
> +{
> + struct device_node *of = NULL;
> + int ret = 0;
> +
> + of = of_get_child_by_name(device->of_node, "switches");
> + if (!of)
> + return -ENODEV;
> +
> + ctx->num_typec_switches = of_get_child_count(of);
> + if (ctx->num_typec_switches <= 0)
> + return -ENODEV;
Since the hardware only allows at most 2 switches (based on the dt-bindings),
you should have a define for that limit and check that it isn't exceeded here.
Thanks,
Nícolas
> +
> + return ret;
> +}
> +
> static int anx7625_i2c_probe(struct i2c_client *client,
> const struct i2c_device_id *id)
> {
> @@ -2686,6 +2702,10 @@ static int anx7625_i2c_probe(struct i2c_client *client,
> if (platform->pdata.intp_irq)
> queue_work(platform->workqueue, &platform->work);
>
> + ret = anx7625_register_typec_switches(dev, platform);
> + if (ret)
> + dev_info(dev, "Didn't register Type C switches, err: %d\n",
> ret);
> +
> platform->bridge.funcs = &anx7625_bridge_funcs;
> platform->bridge.of_node = client->dev.of_node;
> if (!anx7625_of_panel_on_aux_bus(&client->dev))
> diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.h
> b/drivers/gpu/drm/bridge/analogix/anx7625.h
> index e257a84db962..d5cbca708842 100644
> --- a/drivers/gpu/drm/bridge/analogix/anx7625.h
> +++ b/drivers/gpu/drm/bridge/analogix/anx7625.h
> @@ -473,6 +473,7 @@ struct anx7625_data {
> struct drm_connector *connector;
> struct mipi_dsi_device *dsi;
> struct drm_dp_aux aux;
> + int num_typec_switches;
> };
>
> #endif /* __ANX7625_H__ */
> --
> 2.36.1.476.g0c4daa206d-goog
>
