A connector's DPMS mode isn't initialized by default, therefore using a default of 0 (DRM_MODE_DPMS_ON). This can cause problems in that the DRM core won't explicitly turn on a connector because it thinks that it is already on.
Signed-off-by: Thierry Reding treding@nvidia.com --- Note that it would probably make sense to do this in the core, but after some discussion on IRC it became clear that other drivers (specifically i915) use similar workarounds and moving this to the core may cause them to regress.
drivers/gpu/drm/tegra/output.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/gpu/drm/tegra/output.c b/drivers/gpu/drm/tegra/output.c index be6ef34..d911fe8 100644 --- a/drivers/gpu/drm/tegra/output.c +++ b/drivers/gpu/drm/tegra/output.c @@ -264,6 +264,7 @@ int tegra_output_init(struct drm_device *drm, struct tegra_output *output) drm_connector_init(drm, &output->connector, &connector_funcs, connector); drm_connector_helper_add(&output->connector, &connector_helper_funcs); + output->connector.dpms = DRM_MODE_DPMS_OFF;
if (output->panel) drm_panel_attach(output->panel, &output->connector);