On Fri, Oct 15, 2021 at 04:33:45PM +0000, Simon Ser wrote:
> If an hotplug event only updates a single connector, use
> drm_kms_helper_connector_hotplug_event instead of
> drm_kms_helper_hotplug_event.
>
> Signed-off-by: Simon Ser <contact@xxxxxxxxxxx>
> ---
> drivers/gpu/drm/drm_probe_helper.c | 20 ++++++++++++++++----
> 1 file changed, 16 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_probe_helper.c b/drivers/gpu/drm/drm_probe_helper.c
> index 3aef3b188c99..6049dc92324b 100644
> --- a/drivers/gpu/drm/drm_probe_helper.c
> +++ b/drivers/gpu/drm/drm_probe_helper.c
> @@ -927,7 +927,7 @@ EXPORT_SYMBOL(drm_connector_helper_hpd_irq_event);
> */
> bool drm_helper_hpd_irq_event(struct drm_device *dev)
> {
> - struct drm_connector *connector;
> + struct drm_connector *connector, *changed_connector = NULL;
> struct drm_connector_list_iter conn_iter;
> bool changed = false;
>
> @@ -941,15 +941,27 @@ bool drm_helper_hpd_irq_event(struct drm_device *dev)
> if (!(connector->polled & DRM_CONNECTOR_POLL_HPD))
> continue;
>
> - if (check_connector_changed(connector))
> + if (check_connector_changed(connector)) {
> + if (changed) {
> + if (changed_connector)
> + drm_connector_put(changed_connector);
> + changed_connector = NULL;
> + } else {
> + drm_connector_get(connector);
> + changed_connector = connector;
> + }
> +
> changed = true;
So many things that "changed". Would it not be simpler to just grab the
first changed connector always, and count how many there were in total?
> + }
> }
> drm_connector_list_iter_end(&conn_iter);
> mutex_unlock(&dev->mode_config.mutex);
>
> - if (changed) {
> + if (changed_connector) {
> + drm_kms_helper_connector_hotplug_event(changed_connector);
> + drm_connector_put(changed_connector);
> + } else if (changed) {
> drm_kms_helper_hotplug_event(dev);
> - DRM_DEBUG_KMS("Sent hotplug event\n");
> }
>
> return changed;
> --
> 2.33.1
>
--
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