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drm/bridge: lt8912b: Manually disable HPD only if it was enabled 

lt8912b only calls drm_bridge_hpd_enable() if it creates a connector and
the next bridge has DRM_BRIDGE_OP_HPD set. However, when calling
drm_bridge_hpd_disable() it misses checking if a connector was created,
calling drm_bridge_hpd_disable() even if HPD was never enabled. I don't
see any issues caused by this wrong call, though.

Add the check to avoid wrongly calling drm_bridge_hpd_disable().

Fixes: 3b0a01a6a5 ("drm/bridge: lt8912b: Add hot plug detection")
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Tested-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Reviewed-by: Robert Foss <rfoss@kernel.org>
Signed-off-by: Robert Foss <rfoss@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230804-lt8912b-v1-3-c542692c6a2f@ideasonboard.com
This commit is contained in:
Tomi Valkeinen 2023-08-04 13:48:12 +03:00 committed by Robert Foss
parent 4428399314
commit 6985c5efc4
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GPG Key ID: 3EFD900F76D1D784
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/bridge/lontium-lt8912b.c
View File

@ -587,7 +587,7 @@ static void lt8912_bridge_detach(struct drm_bridge *bridge)
lt8912_hard_power_off(lt);
if (lt->hdmi_port->ops & DRM_BRIDGE_OP_HPD)
if (lt->connector.dev && lt->hdmi_port->ops & DRM_BRIDGE_OP_HPD)
drm_bridge_hpd_disable(lt->hdmi_port);
}