linux-kernel - [PATCH 09/11] drm/bridge: anx7625: enable HPD interrupts

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Message-Id: <20250225121824.3869719-10-quic_amakhija@quicinc.com>
Date: Tue, 25 Feb 2025 17:48:22 +0530
From: Ayushi Makhija <quic_amakhija@...cinc.com>
To: linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc: Ayushi Makhija <quic_amakhija@...cinc.com>, robdclark@...il.com,
        dmitry.baryshkov@...aro.org, sean@...rly.run,
        marijn.suijten@...ainline.org, andersson@...nel.org, robh@...nel.org,
        robh+dt@...nel.org, krzk+dt@...nel.org, konradybcio@...nel.org,
        conor+dt@...nel.org, andrzej.hajda@...el.com,
        neil.armstrong@...aro.org, rfoss@...nel.org,
        Laurent.pinchart@...asonboard.com, jonas@...boo.se,
        jernej.skrabec@...il.com, quic_abhinavk@...cinc.com,
        quic_rajeevny@...cinc.com, quic_vproddut@...cinc.com,
        quic_jesszhan@...cinc.com
Subject: [PATCH 09/11] drm/bridge: anx7625: enable HPD interrupts

When device enters the suspend state, it prevents
HPD interrupts from occurring. To address this,
add an additional PM runtime vote during bridge
attach for DisplayPort. This vote is removed on
bridge detach.

Signed-off-by: Ayushi Makhija <quic_amakhija@...cinc.com>
---
 drivers/gpu/drm/bridge/analogix/anx7625.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
index 4be34d5c7a3b..d2655bf46842 100644
--- a/drivers/gpu/drm/bridge/analogix/anx7625.c
+++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
@@ -2168,6 +2168,9 @@ static int anx7625_bridge_attach(struct drm_bridge *bridge,
 
 	ctx->bridge_attached = 1;
 
+	if (ctx->pdata.panel_bridge->type == DRM_MODE_CONNECTOR_DisplayPort)
+		pm_runtime_get_sync(dev);
+
 	return 0;
 }
 
@@ -2175,6 +2178,9 @@ static void anx7625_bridge_detach(struct drm_bridge *bridge)
 {
 	struct anx7625_data *ctx = bridge_to_anx7625(bridge);
 
+	if (ctx->pdata.panel_bridge->type == DRM_MODE_CONNECTOR_DisplayPort)
+		pm_runtime_put_sync(ctx->dev);
+
 	drm_dp_aux_unregister(&ctx->aux);
 }
 
-- 
2.34.1