From 6b1c087ba5789aceb25a2170b217055ce2476f67 Mon Sep 17 00:00:00 2001 From: Jani Nikula Date: Tue, 28 May 2013 12:35:02 +0300 Subject: drm/i915: document why dvo/sdvo/crt need a special dpms function In the cloned case, changing just one output but keeping the other, the pipe state won't change and intel_crtc_update_dpms will be a nop, but we still need to update the dpms state of the output being changed. Only dvo, sdvo and crt are cloneable, so only those three have special dpms functions. Signed-off-by: Jani Nikula Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_dvo.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/gpu/drm/i915/intel_dvo.c') diff --git a/drivers/gpu/drm/i915/intel_dvo.c b/drivers/gpu/drm/i915/intel_dvo.c index 9e80d487b5cb..eb2020eb2b7e 100644 --- a/drivers/gpu/drm/i915/intel_dvo.c +++ b/drivers/gpu/drm/i915/intel_dvo.c @@ -180,6 +180,7 @@ static void intel_enable_dvo(struct intel_encoder *encoder) intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, true); } +/* Special dpms function to support cloning between dvo/sdvo/crt. */ static void intel_dvo_dpms(struct drm_connector *connector, int mode) { struct intel_dvo *intel_dvo = intel_attached_dvo(connector); @@ -201,6 +202,8 @@ static void intel_dvo_dpms(struct drm_connector *connector, int mode) return; } + /* We call connector dpms manually below in case pipe dpms doesn't + * change due to cloning. */ if (mode == DRM_MODE_DPMS_ON) { intel_dvo->base.connectors_active = true; -- cgit v1.2.3