Commit 591b9170 authored by Jani Nikula's avatar Jani Nikula
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drm/i915/ddi: enable ACT handling for 128b/132b SST 



Add ACT handling for 128b/132b SST enable/disable.

This is preparation for enabling 128b/132b SST. This path is not
reachable yet.

v2:
- Check for !is_hdmi (Imre)
- Add disable sequence (Imre)

Reviewed-by: default avatarImre Deak <imre.deak@intel.com>
Signed-off-by: default avatarJani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/b0226471f9445d988917cee49dbbd93a1493f3c7.1735912293.git.jani.nikula@intel.com
parent a9efb7e2

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

+29 −0
Original line number Diff line number Diff line
@@ -3199,7 +3199,9 @@ static void intel_ddi_post_disable_hdmi_or_sst(struct intel_atomic_state *state, 
{

	struct intel_display *display = to_intel_display(encoder);

	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);

	struct intel_dp *intel_dp = enc_to_intel_dp(encoder);

	struct intel_crtc *pipe_crtc;

	bool is_hdmi = intel_crtc_has_type(old_crtc_state, INTEL_OUTPUT_HDMI);

	int i;



	for_each_pipe_crtc_modeset_disable(display, pipe_crtc, old_crtc_state, i) {
@@ -3211,6 +3213,20 @@ static void intel_ddi_post_disable_hdmi_or_sst(struct intel_atomic_state *state, 


	intel_disable_transcoder(old_crtc_state);



	/* 128b/132b SST */

	if (!is_hdmi && intel_dp_is_uhbr(old_crtc_state)) {

		/* VCPID 1, start slot 0 for 128b/132b, clear */

		drm_dp_dpcd_write_payload(&intel_dp->aux, 1, 0, 0);



		intel_ddi_clear_act_sent(encoder, old_crtc_state);



		intel_de_rmw(display, TRANS_DDI_FUNC_CTL(display, old_crtc_state->cpu_transcoder),

			     TRANS_DDI_DP_VC_PAYLOAD_ALLOC, 0);



		intel_ddi_wait_for_act_sent(encoder, old_crtc_state);

		drm_dp_dpcd_poll_act_handled(&intel_dp->aux, 0);

	}



	intel_ddi_disable_transcoder_func(old_crtc_state);



	for_each_pipe_crtc_modeset_disable(display, pipe_crtc, old_crtc_state, i) {
@@ -3493,6 +3509,19 @@ static void intel_ddi_enable(struct intel_atomic_state *state, 
	/* Enable/Disable DP2.0 SDP split config before transcoder */

	intel_audio_sdp_split_update(crtc_state);



	/* 128b/132b SST */

	if (!is_hdmi && intel_dp_is_uhbr(crtc_state)) {

		struct intel_dp *intel_dp = enc_to_intel_dp(encoder);



		intel_ddi_clear_act_sent(encoder, crtc_state);



		intel_de_rmw(display, TRANS_DDI_FUNC_CTL(display, cpu_transcoder), 0,

			     TRANS_DDI_DP_VC_PAYLOAD_ALLOC);



		intel_ddi_wait_for_act_sent(encoder, crtc_state);

		drm_dp_dpcd_poll_act_handled(&intel_dp->aux, 0);

	}



	intel_enable_transcoder(crtc_state);



	intel_ddi_wait_for_fec_status(encoder, crtc_state, true);