From 8fed6193736bf22e0e44c03ee783761e9cc37238 Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Mon, 19 Nov 2012 18:06:51 +0100
Subject: [PATCH] drm/i915: Enable DP audio for Haswell
This patch adds the missing code to send ELD for Haswell DisplayPort,
based on Xingchao's original patch.
A test was performed with HSW-D machine and NEC EA232Wmi DP monitor.
Cc: Xingchao Wang <xingchao.wang@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
drivers/gpu/drm/i915/intel_ddi.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index 58f50ebdbef6..d706d538e8b7 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -669,6 +669,15 @@ static void intel_ddi_mode_set(struct drm_encoder *encoder,
break;
}
+ if (intel_dp->has_audio) {
+ DRM_DEBUG_DRIVER("DP audio on pipe %c on DDI\n",
+ pipe_name(intel_crtc->pipe));
+
+ /* write eld */
+ DRM_DEBUG_DRIVER("DP audio: write eld information\n");
+ intel_write_eld(encoder, adjusted_mode);
+ }
+
intel_dp_init_link_config(intel_dp);
} else if (type == INTEL_OUTPUT_HDMI) {
--
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