[PATCH v9 12/61] drm/display: bridge_connector: Use cached connector status in .get_modes()

Cristian Ciocaltea <[email protected]>
Newsgroups dev.linux.lists.linux-sunxi,org.freedesktop.lists.dri-devel,org.infradead.lists.linux-arm-kernel,org.infradead.lists.linux-rockchip,org.kernel.vger.linux-kernel
Message-ID <[email protected]>
Replace the active drm_bridge_connector_detect() call in get_modes()
with a read of the already-cached connector->status.

The .get_modes() callback is only invoked from
drm_helper_probe_single_connector_modes(), which has already retrieved
the connector status.  Calling detect again is redundant and triggers a
duplicate hotplug event.  This is also a prerequisite for switching to
the .detect_ctx() hook, which requires a drm_modeset_acquire_ctx not
available in the .get_modes() path.

Reviewed-by: Dmitry Baryshkov <[email protected]>
Tested-by: Maud Spierings <[email protected]>
Signed-off-by: Cristian Ciocaltea <[email protected]>
---
 drivers/gpu/drm/display/drm_bridge_connector.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/display/drm_bridge_connector.c b/drivers/gpu/drm/display/drm_bridge_connector.c
index 9ad31e9df0ab..8a833c813101 100644
--- a/drivers/gpu/drm/display/drm_bridge_connector.c
+++ b/drivers/gpu/drm/display/drm_bridge_connector.c
@@ -325,12 +325,10 @@ static const struct drm_connector_funcs drm_bridge_connector_funcs = {
 static int drm_bridge_connector_get_modes_edid(struct drm_connector *connector,
 					       struct drm_bridge *bridge)
 {
-	enum drm_connector_status status;
 	const struct drm_edid *drm_edid;
 	int n;
 
-	status = drm_bridge_connector_detect(connector, false);
-	if (status != connector_status_connected)
+	if (connector->status != connector_status_connected)
 		goto no_edid;
 
 	drm_edid = drm_bridge_edid_read(bridge, connector);

-- 
2.55.0
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