[PATCH 30/45] drm/msm/dp: add dp_display_get_panel() to initialize DP panel

[Abhinav Kumar]

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_abhin...@quicinc.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