From bfcc3d8f94f4cb7b97cd666367ffc729342d30c0 Mon Sep 17 00:00:00 2001
From: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Date: Mon, 4 Sep 2023 01:24:32 +0300
Subject: [PATCH] drm/msm/dp: support setting the DP subconnector type
Read the downstream port info and set the subconnector type accordingly.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Patchwork: https://patchwork.freedesktop.org/patch/555531/
Link: https://lore.kernel.org/r/20230903222432.2894093-1-dmitry.baryshkov@linaro.org
---
drivers/gpu/drm/msm/dp/dp_display.c | 9 ++++++++-
drivers/gpu/drm/msm/dp/dp_panel.c | 5 +++++
drivers/gpu/drm/msm/dp/dp_panel.h | 1 +
3 files changed, 14 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index 2a5f1ab9a65b0..397bc19f408dc 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -364,8 +364,12 @@ static int dp_display_send_hpd_notification(struct dp_display_private *dp,
}
/* reset video pattern flag on disconnect */
- if (!hpd)
+ if (!hpd) {
dp->panel->video_test = false;
+ drm_dp_set_subconnector_property(dp->dp_display.connector,
+ connector_status_disconnected,
+ dp->panel->dpcd, dp->panel->downstream_ports);
+ }
dp->dp_display.is_connected = hpd;
@@ -393,6 +397,9 @@ static int dp_display_process_hpd_high(struct dp_display_private *dp)
dp_link_process_request(dp->link);
+ drm_dp_set_subconnector_property(dp->dp_display.connector, connector_status_connected,
+ dp->panel->dpcd, dp->panel->downstream_ports);
+
edid = dp->panel->edid;
dp->dp_display.psr_supported = dp->panel->psr_cap.version && psr_enabled;
diff --git a/drivers/gpu/drm/msm/dp/dp_panel.c b/drivers/gpu/drm/msm/dp/dp_panel.c
index 0871ef42933e3..127f6af995cd1 100644
--- a/drivers/gpu/drm/msm/dp/dp_panel.c
+++ b/drivers/gpu/drm/msm/dp/dp_panel.c
@@ -161,6 +161,11 @@ int dp_panel_read_sink_caps(struct dp_panel *dp_panel,
}
}
+ rc = drm_dp_read_downstream_info(panel->aux, dp_panel->dpcd,
+ dp_panel->downstream_ports);
+ if (rc)
+ return rc;
+
kfree(dp_panel->edid);
dp_panel->edid = NULL;
diff --git a/drivers/gpu/drm/msm/dp/dp_panel.h b/drivers/gpu/drm/msm/dp/dp_panel.h
index 3cb1f8dcfd3b0..a0dfc579c5f9f 100644
--- a/drivers/gpu/drm/msm/dp/dp_panel.h
+++ b/drivers/gpu/drm/msm/dp/dp_panel.h
@@ -36,6 +36,7 @@ struct dp_panel_psr {
struct dp_panel {
/* dpcd raw data */
u8 dpcd[DP_RECEIVER_CAP_SIZE];
+ u8 downstream_ports[DP_MAX_DOWNSTREAM_PORTS];
struct dp_link_info link_info;
struct drm_dp_desc desc;
--
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