On 24/10/2022 18:39, Dmitry Baryshkov wrote:
Intruct two drm_connector_helper_funcs: enable_hpd() and disable_hpd().
"Introduce"?
They are called by drm_kms_helper_poll_enable() and
drm_kms_helper_poll_disable() (and thus drm_kms_helper_poll_init() and
drm_kms_helper_poll_fini()) respectively.
This allows drivers to rely on drm_kms_helper_poll for enabling and
disabling HPD detection rather than doing that manually.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
---
drivers/gpu/drm/drm_probe_helper.c | 19 +++++++++++++++++++
include/drm/drm_modeset_helper_vtables.h | 22 ++++++++++++++++++++++
2 files changed, 41 insertions(+)
diff --git a/drivers/gpu/drm/drm_probe_helper.c b/drivers/gpu/drm/drm_probe_helper.c
index f97fda3b1d34..a7b4590d8ec1 100644
--- a/drivers/gpu/drm/drm_probe_helper.c
+++ b/drivers/gpu/drm/drm_probe_helper.c
@@ -251,6 +251,12 @@ void drm_kms_helper_poll_enable(struct drm_device *dev)
drm_connector_list_iter_begin(dev, &conn_iter);
drm_for_each_connector_iter(connector, &conn_iter) {
+ const struct drm_connector_helper_funcs *funcs =
+ connector->helper_private;
+
+ if (funcs && funcs->enable_hpd)
+ funcs->enable_hpd(connector);
+
if (connector->polled & (DRM_CONNECTOR_POLL_CONNECT |
DRM_CONNECTOR_POLL_DISCONNECT))
poll = true;
@@ -805,12 +811,25 @@ EXPORT_SYMBOL(drm_kms_helper_is_poll_worker);
static void drm_kms_helper_poll_disable_fini(struct drm_device *dev, bool fini)
{
+ struct drm_connector *connector;
+ struct drm_connector_list_iter conn_iter;
+
if (!dev->mode_config.poll_enabled)
return;
if (fini)
dev->mode_config.poll_enabled = false;
+ drm_connector_list_iter_begin(dev, &conn_iter);
+ drm_for_each_connector_iter(connector, &conn_iter) {
+ const struct drm_connector_helper_funcs *funcs =
+ connector->helper_private;
+
+ if (funcs && funcs->disable_hpd)
+ funcs->disable_hpd(connector);
+ }
+ drm_connector_list_iter_end(&conn_iter);
+
cancel_delayed_work_sync(&dev->mode_config.output_poll_work);
}
diff --git a/include/drm/drm_modeset_helper_vtables.h b/include/drm/drm_modeset_helper_vtables.h
index fafa70ac1337..7aa1f01223f9 100644
--- a/include/drm/drm_modeset_helper_vtables.h
+++ b/include/drm/drm_modeset_helper_vtables.h
@@ -1143,6 +1143,28 @@ struct drm_connector_helper_funcs {
*/
void (*cleanup_writeback_job)(struct drm_writeback_connector *connector,
struct drm_writeback_job *job);
+
+ /**
+ * @enable_hpd:
+ *
+ * Enable hot-plug detection for the connector.
+ *
+ * This operation is optional.
+ *
+ * This callback is used by the drm_kms_helper_poll_enable() helpers.
+ */
+ void (*enable_hpd)(struct drm_connector *connector);
+
+ /**
+ * @disable_hpd:
+ *
+ * Disable hot-plug detection for the connector.
+ *
+ * This operation is optional.
+ *
+ * This callback is used by the drm_kms_helper_poll_disable() helpers.
+ */
+ void (*disable_hpd)(struct drm_connector *connector);
};
/**
