linux-kernel - [PATCH 30/45] drm/msm/dp: add dp_display_get

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Message-ID: <20241205-dp_mst-v1-30-f8618d42a99a@quicinc.com>
Date: Thu, 5 Dec 2024 20:32:01 -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 30/45] drm/msm/dp: add dp_display_get_panel() to initialize
 DP panel

Add an API dp_display_get_panel() to initialize and return a DP
panel to be used by DP MST module. Since some of the fields of
DP panel are private, dp_display module needs to initialize these
parts and return the panel back.

Signed-off-by: Abhinav Kumar <quic_abhinavk@...cinc.com>
---
 drivers/gpu/drm/msm/dp/dp_display.c | 28 ++++++++++++++++++++++++++++
 drivers/gpu/drm/msm/dp/dp_display.h |  2 ++
 2 files changed, 30 insertions(+)

diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index a67bc7c1b83a5a9996435804ff7337f72dae93a0..60316633cc6bcfdfad8ab356d803642d353add61 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -753,6 +753,34 @@ static int msm_dp_irq_hpd_handle(struct msm_dp_display_private *dp, u32 data)
 	return 0;
 }
 
+struct msm_dp_panel *msm_dp_display_get_panel(struct msm_dp *dp_display)
+{
+	struct msm_dp_display_private *dp;
+	struct msm_dp_panel *dp_panel;
+
+	struct msm_dp_panel_in panel_in;
+
+	dp = container_of(dp_display, struct msm_dp_display_private, msm_dp_display);
+
+	panel_in.dev = &dp_display->pdev->dev;
+	panel_in.aux = dp->aux;
+	panel_in.catalog = dp->catalog;
+	panel_in.link = dp->link;
+
+	dp_panel = msm_dp_panel_get(&panel_in);
+
+	if (IS_ERR(dp->panel)) {
+		DRM_ERROR("failed to initialize panel\n");
+		return NULL;
+	}
+
+	memcpy(dp_panel->dpcd, dp->panel->dpcd, DP_RECEIVER_CAP_SIZE + 1);
+	memcpy(&dp_panel->link_info, &dp->panel->link_info,
+	       sizeof(dp->panel->link_info));
+
+	return dp_panel;
+}
+
 static void msm_dp_display_deinit_sub_modules(struct msm_dp_display_private *dp)
 {
 	msm_dp_audio_put(dp->audio);
diff --git a/drivers/gpu/drm/msm/dp/dp_display.h b/drivers/gpu/drm/msm/dp/dp_display.h
index f1142b7b96c372b49e8e45dd0378eb507b081915..6ab14e969bce0fd07b3a550bae17e99652479232 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.h
+++ b/drivers/gpu/drm/msm/dp/dp_display.h
@@ -68,4 +68,6 @@ void msm_dp_display_unprepare(struct msm_dp *dp);
 
 int msm_dp_display_get_active_stream_cnt(struct msm_dp *msm_dp);
 
+struct msm_dp_panel *msm_dp_display_get_panel(struct msm_dp *dp_display);
+
 #endif /* _DP_DISPLAY_H_ */

-- 
2.34.1