[PATCH v5 16/25] drm/msm/dp: add msm_dp_display_get_panel() to initialize DP panel

[Yongxing Mou]

From: Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx>

Add an API msm_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@xxxxxxxxxxx>
Signed-off-by: Yongxing Mou <yongxing.mou@xxxxxxxxxxxxxxxx>
---
 drivers/gpu/drm/msm/dp/dp_display.c | 27 +++++++++++++++++++++++++++
 drivers/gpu/drm/msm/dp/dp_display.h |  2 ++
 2 files changed, 29 insertions(+)

diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index c3be656f10ee..2a74302bcb7c 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -565,6 +565,33 @@ static int msm_dp_irq_hpd_handle(struct msm_dp_display_private *dp)
 	return rc;
 }
 
+struct msm_dp_panel *msm_dp_display_get_panel(struct msm_dp *msm_dp_display,
+					      enum msm_dp_stream_id stream_id)
+{
+	struct msm_dp_display_private *dp;
+	struct msm_dp_panel *dp_panel;
+
+	dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display);
+
+	if (stream_id >= DP_STREAM_MAX || stream_id >= dp->max_stream) {
+		DRM_ERROR("invalid stream_id %d\n", stream_id);
+		return NULL;
+	}
+
+	dp_panel = msm_dp_panel_get(&dp->msm_dp_display.pdev->dev, dp->aux, dp->link,
+				    dp->link_base, dp->mst2link_base, dp->mst3link_base,
+				    dp->pixel_base[stream_id]);
+
+	if (IS_ERR(dp_panel)) {
+		DRM_ERROR("failed to initialize panel\n");
+		return NULL;
+	}
+
+	dp_panel->stream_id = stream_id;
+
+	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 75dc40261723..676213a48089 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.h
+++ b/drivers/gpu/drm/msm/dp/dp_display.h
@@ -58,4 +58,6 @@ int msm_dp_display_set_mode_helper(struct msm_dp *msm_dp_display,
 int msm_dp_display_prepare_link(struct msm_dp *msm_dp_display);
 void msm_dp_display_unprepare(struct msm_dp *dp);
 
+struct msm_dp_panel *msm_dp_display_get_panel(struct msm_dp *msm_dp_display,
+					      enum msm_dp_stream_id stream_id);
 #endif /* _DP_DISPLAY_H_ */

-- 
2.43.0