On Tue, May 26, 2020 at 04:14:41AM +0300, Laurent Pinchart wrote:
> Implement the bridge connector-related .get_edid(), .detect() and
> .hpd_notify() operations, and report the related bridge capabilities.
>
> Output status detection is implemented using the same backend as for the
> DRM connector, but requires making mode retrieval at detection time
> optional as no pointer to the connector is available to the bridge
> .detect() operation. The reason for the need to retrieve modes at
> detection time is unclear to me, and this may benefit from further
> refactoring of hot plug handling code.
As discussed before the get_modes is likely not needed.
But this patch should not remove it - so fine
>
> Hot plug detection is notified through the bridge HPD notification
> framework when the bridge is used without creating a connector, and
> falls back to the existing implementation otherwise. CEC handling of
> disconnection is handled in the new .hpd_notify() operation in the new
> code path.
>
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@xxxxxxxxxxxxxxxx>
Acked-by: Sam Ravnborg <sam@xxxxxxxxxxxx>
> ---
> drivers/gpu/drm/bridge/adv7511/adv7511_drv.c | 43 ++++++++++++++++++--
> 1 file changed, 39 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
> index f0992b6d654f..2662f28f8007 100644
> --- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
> +++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
> @@ -443,9 +443,14 @@ static void adv7511_hpd_work(struct work_struct *work)
>
> if (adv7511->connector.status != status) {
> adv7511->connector.status = status;
> - if (status == connector_status_disconnected)
> - cec_phys_addr_invalidate(adv7511->cec_adap);
> - drm_kms_helper_hotplug_event(adv7511->connector.dev);
> +
> + if (adv7511->connector.dev) {
> + if (status == connector_status_disconnected)
> + cec_phys_addr_invalidate(adv7511->cec_adap);
> + drm_kms_helper_hotplug_event(adv7511->connector.dev);
> + } else {
> + drm_bridge_hpd_notify(&adv7511->bridge, status);
> + }
> }
> }
>
> @@ -661,7 +666,8 @@ adv7511_detect(struct adv7511 *adv7511, struct drm_connector *connector)
> if (status == connector_status_connected && hpd && adv7511->powered) {
> regcache_mark_dirty(adv7511->regmap);
> adv7511_power_on(adv7511);
> - adv7511_get_modes(adv7511, connector);
> + if (connector)
> + adv7511_get_modes(adv7511, connector);
> if (adv7511->status == connector_status_connected)
> status = connector_status_disconnected;
> } else {
> @@ -917,11 +923,38 @@ static int adv7511_bridge_attach(struct drm_bridge *bridge,
> return ret;
> }
>
> +static enum drm_connector_status adv7511_bridge_detect(struct drm_bridge *bridge)
> +{
> + struct adv7511 *adv = bridge_to_adv7511(bridge);
> +
> + return adv7511_detect(adv, NULL);
> +}
> +
> +static struct edid *adv7511_bridge_get_edid(struct drm_bridge *bridge,
> + struct drm_connector *connector)
> +{
> + struct adv7511 *adv = bridge_to_adv7511(bridge);
> +
> + return adv7511_get_edid(adv, connector);
> +}
> +
> +static void adv7511_bridge_hpd_notify(struct drm_bridge *bridge,
> + enum drm_connector_status status)
> +{
> + struct adv7511 *adv = bridge_to_adv7511(bridge);
> +
> + if (status == connector_status_disconnected)
> + cec_phys_addr_invalidate(adv->cec_adap);
> +}
> +
> static const struct drm_bridge_funcs adv7511_bridge_funcs = {
> .enable = adv7511_bridge_enable,
> .disable = adv7511_bridge_disable,
> .mode_set = adv7511_bridge_mode_set,
> .attach = adv7511_bridge_attach,
> + .detect = adv7511_bridge_detect,
> + .get_edid = adv7511_bridge_get_edid,
> + .hpd_notify = adv7511_bridge_hpd_notify,
> };
>
> /* -----------------------------------------------------------------------------
> @@ -1250,6 +1283,8 @@ static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
> goto err_unregister_cec;
>
> adv7511->bridge.funcs = &adv7511_bridge_funcs;
> + adv7511->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID
> + | DRM_BRIDGE_OP_HPD;
> adv7511->bridge.of_node = dev->of_node;
>
> drm_bridge_add(&adv7511->bridge);
> --
> Regards,
>
> Laurent Pinchart
>
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