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SubjectRe: [PATCH 06/30] drm/bridge/ti-sn65dsi86: (Un)register aux device on bridge attach/detach
Hi Lyude,

Thank you for the patch.

On Fri, Feb 19, 2021 at 04:53:02PM -0500, Lyude Paul wrote:
> Since we're about to add a back-pointer to drm_dev in drm_dp_aux, let's
> move the AUX adapter registration to the first point where we know which
> DRM device we'll be working with - when the drm_bridge is attached.
> Likewise, we unregister the AUX adapter on bridge detachment by adding a
> ti_sn_bridge_detach() callback.
>
> Signed-off-by: Lyude Paul <lyude@redhat.com>

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> ---
> drivers/gpu/drm/bridge/ti-sn65dsi86.c | 18 ++++++++++++++++--
> 1 file changed, 16 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
> index f27306c51e4d..88df4dd0f39d 100644
> --- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c
> +++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
> @@ -362,12 +362,18 @@ static int ti_sn_bridge_attach(struct drm_bridge *bridge,
> return -EINVAL;
> }
>
> + ret = drm_dp_aux_register(&pdata->aux);
> + if (ret < 0) {
> + drm_err(bridge->dev, "Failed to register DP AUX channel: %d\n", ret);
> + return ret;
> + }
> +
> ret = drm_connector_init(bridge->dev, &pdata->connector,
> &ti_sn_bridge_connector_funcs,
> DRM_MODE_CONNECTOR_eDP);
> if (ret) {
> DRM_ERROR("Failed to initialize connector with drm\n");
> - return ret;
> + goto err_conn_init;
> }
>
> drm_connector_helper_add(&pdata->connector,
> @@ -424,9 +430,16 @@ static int ti_sn_bridge_attach(struct drm_bridge *bridge,
> mipi_dsi_device_unregister(dsi);
> err_dsi_host:
> drm_connector_cleanup(&pdata->connector);
> +err_conn_init:
> + drm_dp_aux_unregister(&pdata->aux);
> return ret;
> }
>
> +static void ti_sn_bridge_detach(struct drm_bridge *bridge)
> +{
> + drm_dp_aux_unregister(&bridge_to_ti_sn_bridge(bridge)->aux);
> +}
> +
> static void ti_sn_bridge_disable(struct drm_bridge *bridge)
> {
> struct ti_sn_bridge *pdata = bridge_to_ti_sn_bridge(bridge);
> @@ -863,6 +876,7 @@ static void ti_sn_bridge_post_disable(struct drm_bridge *bridge)
>
> static const struct drm_bridge_funcs ti_sn_bridge_funcs = {
> .attach = ti_sn_bridge_attach,
> + .detach = ti_sn_bridge_detach,
> .pre_enable = ti_sn_bridge_pre_enable,
> .enable = ti_sn_bridge_enable,
> .disable = ti_sn_bridge_disable,
> @@ -1287,7 +1301,7 @@ static int ti_sn_bridge_probe(struct i2c_client *client,
> pdata->aux.name = "ti-sn65dsi86-aux";
> pdata->aux.dev = pdata->dev;
> pdata->aux.transfer = ti_sn_aux_transfer;
> - drm_dp_aux_register(&pdata->aux);
> + drm_dp_aux_init(&pdata->aux);
>
> pdata->bridge.funcs = &ti_sn_bridge_funcs;
> pdata->bridge.of_node = client->dev.of_node;

--
Regards,

Laurent Pinchart

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