linux-kernel - [PATCH 13/45] drm/msm/dp: separate dp_display

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Message-ID: <20241205-dp_mst-v1-13-f8618d42a99a@quicinc.com>
Date: Thu, 5 Dec 2024 20:31:44 -0800
From: Abhinav Kumar <quic_abhinavk@...cinc.com>
To: Rob Clark <robdclark@...il.com>,
        Dmitry Baryshkov
	<dmitry.baryshkov@...aro.org>,
        Sean Paul <sean@...rly.run>,
        Marijn Suijten
	<marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>, "Simona
 Vetter" <simona@...ll.ch>,
        Stephen Boyd <swboyd@...omium.org>,
        "Chandan
 Uddaraju" <chandanu@...eaurora.org>,
        Guenter Roeck <groeck@...omium.org>,
        Kuogee Hsieh <quic_khsieh@...cinc.com>,
        Bjorn Andersson
	<andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, Rob Herring
	<robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
	<conor+dt@...nel.org>
CC: Vara Reddy <quic_varar@...cinc.com>, Rob Clark <robdclark@...omium.org>,
        Tanmay Shah <tanmay@...eaurora.org>, <linux-arm-msm@...r.kernel.org>,
        <dri-devel@...ts.freedesktop.org>, <freedreno@...ts.freedesktop.org>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        Jessica Zhang
	<quic_jesszhan@...cinc.com>,
        Laurent Pinchart
	<laurent.pinchart@...asonboard.com>,
        Abhinav Kumar
	<quic_abhinavk@...cinc.com>
Subject: [PATCH 13/45] drm/msm/dp: separate dp_display_prepare() into its
 own API

dp_display_prepare() only prepares the link in case its not
already ready before dp_display_enable(). Hence separate it into
its own API.

Signed-off-by: Abhinav Kumar <quic_abhinavk@...cinc.com>
---
 drivers/gpu/drm/msm/dp/dp_display.c | 24 +++++++++++++++++-------
 drivers/gpu/drm/msm/dp/dp_display.h |  1 +
 drivers/gpu/drm/msm/dp/dp_drm.c     |  2 ++
 3 files changed, 20 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index 2f8650d60202deaa90de1a5e0dd6d8bc50f09782..02282f58f1b31594601692b406215cee4ca41032 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -1525,26 +1525,36 @@ int msm_dp_modeset_init(struct msm_dp *msm_dp_display, struct drm_device *dev,
 	return 0;
 }
 
-void msm_dp_display_atomic_enable(struct msm_dp *dp)
+void msm_dp_display_atomic_prepare(struct msm_dp *dp)
 {
 	int rc = 0;
-
 	struct msm_dp_display_private *msm_dp_display;
 
 	msm_dp_display = container_of(dp, struct msm_dp_display_private, msm_dp_display);
 
-	if (dp->is_edp)
-		msm_dp_hpd_plug_handle(msm_dp_display, 0);
-
 	mutex_lock(&msm_dp_display->event_mutex);
 
 	rc = msm_dp_display_prepare(msm_dp_display);
 	if (rc) {
 		DRM_ERROR("DP display prepare failed, rc=%d\n", rc);
-		mutex_unlock(&msm_dp_display->event_mutex);
-		return;
 	}
 
+	mutex_unlock(&msm_dp_display->event_mutex);
+}
+
+void msm_dp_display_atomic_enable(struct msm_dp *dp)
+{
+	int rc = 0;
+
+	struct msm_dp_display_private *msm_dp_display;
+
+	msm_dp_display = container_of(dp, struct msm_dp_display_private, msm_dp_display);
+
+	if (dp->is_edp)
+		msm_dp_hpd_plug_handle(msm_dp_display, 0);
+
+	mutex_lock(&msm_dp_display->event_mutex);
+
 	if (dp->prepared) {
 		rc = msm_dp_display_enable(msm_dp_display);
 		if (rc)
diff --git a/drivers/gpu/drm/msm/dp/dp_display.h b/drivers/gpu/drm/msm/dp/dp_display.h
index 2a800164cd9c74c29db80dbad15a2dff9fcb93d6..46912a9855b512d9dc6a4edff91ffd21df46e22a 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.h
+++ b/drivers/gpu/drm/msm/dp/dp_display.h
@@ -44,6 +44,7 @@ void msm_dp_display_debugfs_init(struct msm_dp *msm_dp_display, struct dentry *d
 void msm_dp_display_atomic_post_disable(struct msm_dp *dp_display);
 void msm_dp_display_atomic_disable(struct msm_dp *dp_display);
 void msm_dp_display_atomic_enable(struct msm_dp *dp_display);
+void msm_dp_display_atomic_prepare(struct msm_dp *dp);
 void msm_dp_display_mode_set(struct msm_dp *dp,
 			     const struct drm_display_mode *mode,
 			     const struct drm_display_mode *adjusted_mode);
diff --git a/drivers/gpu/drm/msm/dp/dp_drm.c b/drivers/gpu/drm/msm/dp/dp_drm.c
index 4ef3f16a68890bc220d147ac3d04f53ef911f004..920392b3c688821bccdc66d50fb7052ac3a9a85a 100644
--- a/drivers/gpu/drm/msm/dp/dp_drm.c
+++ b/drivers/gpu/drm/msm/dp/dp_drm.c
@@ -103,6 +103,7 @@ static void msm_dp_bridge_atomic_enable(struct drm_bridge *drm_bridge,
 	struct msm_dp_bridge *dp_bridge = to_dp_bridge(drm_bridge);
 	struct msm_dp *dp = dp_bridge->msm_dp_display;
 
+	msm_dp_display_atomic_prepare(dp);
 	msm_dp_display_atomic_enable(dp);
 }
 
@@ -210,6 +211,7 @@ static void msm_edp_bridge_atomic_enable(struct drm_bridge *drm_bridge,
 		return;
 	}
 
+	msm_dp_display_atomic_prepare(dp);
 	msm_dp_display_atomic_enable(dp);
 }
 

-- 
2.34.1