linux-kernel - [PATCH] drm/i915/display: add audio dis/enable when connector hotplug

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Message-Id: <20250318070435.347383-1-yaolu@kylinos.cn>
Date: Tue, 18 Mar 2025 15:04:35 +0800
From: Lu Yao <yaolu@...inos.cn>
To: jani.nikula@...ux.intel.com,
	rodrigo.vivi@...el.com,
	joonas.lahtinen@...ux.intel.com,
	tursulin@...ulin.net
Cc: intel-gfx@...ts.freedesktop.org,
	dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org,
	Lu Yao <yaolu@...inos.cn>
Subject: [PATCH] drm/i915/display: add audio dis/enable when connector hotplug

Now audio enable/disable depends on an atomic commit, it doesn't make
sence. For wayland, there will trigering an atomic commit, so it
works well. But for Xorg using modesetting, there won't. In this
case, unplug the HDMI/DP and the audio jack event is not triggered,
resulting in still having a HDMI/DP audio output choice.

Signed-off-by: Lu Yao <yaolu@...inos.cn>
---
 drivers/gpu/drm/i915/display/intel_hotplug.c | 31 ++++++++++++++++++++
 1 file changed, 31 insertions(+)
---
Test hardware:
  CPU: i5-12500
  GPU: UHD Graphics 770


diff --git a/drivers/gpu/drm/i915/display/intel_hotplug.c b/drivers/gpu/drm/i915/display/intel_hotplug.c
index 3adc791d3776..332d6e1a99cd 100644
--- a/drivers/gpu/drm/i915/display/intel_hotplug.c
+++ b/drivers/gpu/drm/i915/display/intel_hotplug.c
@@ -32,6 +32,7 @@
 #include "intel_display_types.h"
 #include "intel_hotplug.h"
 #include "intel_hotplug_irq.h"
+#include "intel_audio.h"
 
 /**
  * DOC: Hotplug
@@ -415,6 +416,35 @@ void intel_hpd_trigger_irq(struct intel_digital_port *dig_port)
 	queue_work(i915->display.hotplug.dp_wq, &i915->display.hotplug.dig_port_work);
 }
 
+/*
+ * when connector hotplug state changed, audio need changed too.
+ */
+static void i915_audio_hotplug(struct intel_connector *connector)
+{
+	struct drm_crtc *crtc;
+	struct drm_device *dev = connector->base.dev;
+
+	drm_for_each_crtc(crtc, dev) {
+		if (connector->base.state->crtc == crtc) {
+			struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+			struct intel_crtc_state *pipe_config =
+				to_intel_crtc_state(intel_crtc->base.state);
+			struct intel_encoder *encoder =
+				intel_attached_encoder(connector);
+
+			if (pipe_config && pipe_config->has_audio) {
+				if (connector->base.status == connector_status_disconnected)
+					intel_audio_codec_disable(encoder, pipe_config,
+								  connector->base.state);
+				else if (connector->base.status == connector_status_connected)
+					intel_audio_codec_enable(encoder, pipe_config,
+								 connector->base.state);
+			}
+			break;
+		}
+	}
+}
+
 /*
  * Handle hotplug events outside the interrupt handler proper.
  */
@@ -487,6 +517,7 @@ static void i915_hotplug_work_func(struct work_struct *work)
 					drm_connector_get(&connector->base);
 					first_changed_connector = &connector->base;
 				}
+				i915_audio_hotplug(connector);
 				break;
 			case INTEL_HOTPLUG_RETRY:
 				retry |= hpd_bit;
-- 
2.25.1