[Intel-gfx] [PATCH v2 07/18] drm/i915/ddi: write ELD where it's supposed to be done

[Jani Nikula]

The audio programming sequence states that the ELD must be written and
enabled after the pipe is ready. Indeed, this should clarify the
situation with

commit c79057922ed6c2c6df1214e6ab4414fea1b23db2
Author: Daniel Vetter <daniel.vetter at ffwll.ch>
Date:   Wed Apr 16 16:56:09 2014 +0200

    drm/i915: Remove vblank wait from haswell_write_eld

and Ville's review of it [1].

Moreover, we should not touch the relevant registers before we get the
audio power domain.

[1] http://mid.gmane.org/20140416155309.GK18465@intel.com

Signed-off-by: Jani Nikula <jani.nikula at intel.com>
---
 drivers/gpu/drm/i915/intel_audio.c |  2 --
 drivers/gpu/drm/i915/intel_ddi.c   | 11 ++---------
 2 files changed, 2 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_audio.c b/drivers/gpu/drm/i915/intel_audio.c
index 4d644efde608..b9d3a143dd8c 100644
--- a/drivers/gpu/drm/i915/intel_audio.c
+++ b/drivers/gpu/drm/i915/intel_audio.c
@@ -160,8 +160,6 @@ static void haswell_write_eld(struct drm_connector *connector,
 	I915_WRITE(aud_cntrl_st2, tmp);
 	POSTING_READ(aud_cntrl_st2);
 
-	assert_pipe_disabled(dev_priv, pipe);
-
 	/* Set ELD valid state */
 	tmp = I915_READ(aud_cntrl_st2);
 	DRM_DEBUG_DRIVER("HDMI audio: pin eld vld status=0x%08x\n", tmp);
diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index 2688bc940879..56e7cb1ddc75 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -1120,15 +1120,6 @@ static void intel_ddi_pre_enable(struct intel_encoder *intel_encoder)
 	enum port port = intel_ddi_get_encoder_port(intel_encoder);
 	int type = intel_encoder->type;
 
-	if (crtc->config.has_audio) {
-		DRM_DEBUG_DRIVER("Audio on pipe %c on DDI\n",
-				 pipe_name(crtc->pipe));
-
-		/* write eld */
-		DRM_DEBUG_DRIVER("DDI audio: write eld information\n");
-		intel_write_eld(intel_encoder);
-	}
-
 	if (type == INTEL_OUTPUT_EDP) {
 		struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
 		intel_edp_panel_on(intel_dp);
@@ -1225,6 +1216,8 @@ static void intel_enable_ddi(struct intel_encoder *intel_encoder)
 
 	if (intel_crtc->config.has_audio) {
 		intel_display_power_get(dev_priv, POWER_DOMAIN_AUDIO);
+		intel_write_eld(intel_encoder);
+
 		tmp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD);
 		tmp |= ((AUDIO_OUTPUT_ENABLE_A | AUDIO_ELD_VALID_A) << (pipe * 4));
 		I915_WRITE(HSW_AUD_PIN_ELD_CP_VLD, tmp);
-- 
2.1.1