Commit 50a7efb2 authored Dec 02, 2019 by José Roberto de Souza

drm/i915/dp: Power down sink before disable pipe/transcoder clock



Disabling pipe/transcoder clock before power down sink could cause
sink lost signal, causing it to trigger a hotplug to notify source
that link signal was lost.

Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191202222513.337777-2-jose.souza@intel.com

parent e815aff5

drivers/gpu/drm/i915/display/intel_ddi.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -3802,12 +3802,12 @@ static void intel_ddi_post_disable_dp(struct intel_encoder *encoder,
		enum phy phy = intel_port_to_phy(dev_priv, encoder->port);

		if (!is_mst) {
		intel_ddi_disable_pipe_clock(old_crtc_state);
		/*
		* Power down sink before disabling the port, otherwise we end
		* up getting interrupts from the sink on detecting link loss.
		*/
		intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
		intel_ddi_disable_pipe_clock(old_crtc_state);
		}

		intel_disable_ddi_buf(encoder, old_crtc_state);

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