diff mbox series

[v2,2/2] drm/tegra: output: rgb: Don't register connector if bridge is used

Message ID 20200414222007.31306-3-digetx@gmail.com
State Superseded
Headers show
Series Support DRM bridges on NVIDIA Tegra | expand

Commit Message

Dmitry Osipenko April 14, 2020, 10:20 p.m. UTC 
We rely on the connector that is created by the bridge, and thus, the
Tegra's output connector is not needed in this case because it will be
an unused connector.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
 drivers/gpu/drm/tegra/rgb.c | 21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/tegra/rgb.c b/drivers/gpu/drm/tegra/rgb.c
index 4be4dfd4a68a..6e6b3fee1d87 100644
--- a/drivers/gpu/drm/tegra/rgb.c
+++ b/drivers/gpu/drm/tegra/rgb.c
@@ -275,21 +275,32 @@  int tegra_dc_rgb_init(struct drm_device *drm, struct tegra_dc *dc)
 	if (!dc->rgb)
 		return -ENODEV;
 
+	drm_encoder_init(drm, &output->encoder, &tegra_rgb_encoder_funcs,
+			 DRM_MODE_ENCODER_LVDS, NULL);
+	drm_encoder_helper_add(&output->encoder,
+			       &tegra_rgb_encoder_helper_funcs);
+
+	/*
+	 * We don't create a parent "output bridge" that sets the
+	 * DRM_BRIDGE_ATTACH_NO_CONNECTOR flag for drm_bridge_attach(),
+	 * and thus, the bridge creates connector for us in this case.
+	 * The output's connector is unused and not needed if bridge is
+	 * used, so skip the connector's registration in this case.
+	 */
+	if (output->bridge)
+		goto init_output;
+
 	drm_connector_init(drm, &output->connector, &tegra_rgb_connector_funcs,
 			   DRM_MODE_CONNECTOR_LVDS);
 	drm_connector_helper_add(&output->connector,
 				 &tegra_rgb_connector_helper_funcs);
 	output->connector.dpms = DRM_MODE_DPMS_OFF;
 
-	drm_encoder_init(drm, &output->encoder, &tegra_rgb_encoder_funcs,
-			 DRM_MODE_ENCODER_LVDS, NULL);
-	drm_encoder_helper_add(&output->encoder,
-			       &tegra_rgb_encoder_helper_funcs);
-
 	drm_connector_attach_encoder(&output->connector,
 					  &output->encoder);
 	drm_connector_register(&output->connector);
 
+init_output:
 	err = tegra_output_init(drm, output);
 	if (err < 0) {
 		dev_err(output->dev, "failed to initialize output: %d\n", err);