[PATCH 07/11] drm/amd/display: Attach privacy screen to DRM connector

[Alex Hung]

From: Mario Limonciello <mario.limonciello at amd.com>

[WHY]
If a system has a privacy screen advertised by a driver it should
be included in the DRM connector for the eDP panel.

[HOW]
Detect statically declared privacy screens when creating eDP connector
and attach privacy screen DRM properties.

Reviewed-by: Harry Wentland <harry.wentland at amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello at amd.com>
Signed-off-by: Alex Hung <alex.hung at amd.com>
---
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 25 ++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index e8cfae2bd2ae..176f420effd9 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -80,6 +80,7 @@
 #include <linux/component.h>
 #include <linux/sort.h>
 
+#include <drm/drm_privacy_screen_consumer.h>
 #include <drm/display/drm_dp_mst_helper.h>
 #include <drm/display/drm_hdmi_helper.h>
 #include <drm/drm_atomic.h>
@@ -7846,6 +7847,14 @@ amdgpu_dm_connector_atomic_check(struct drm_connector *conn,
 	if (!crtc)
 		return 0;
 
+	if (new_con_state->privacy_screen_sw_state != old_con_state->privacy_screen_sw_state) {
+		new_crtc_state = drm_atomic_get_crtc_state(state, crtc);
+		if (IS_ERR(new_crtc_state))
+			return PTR_ERR(new_crtc_state);
+
+		new_crtc_state->mode_changed = true;
+	}
+
 	if (new_con_state->colorspace != old_con_state->colorspace) {
 		new_crtc_state = drm_atomic_get_crtc_state(state, crtc);
 		if (IS_ERR(new_crtc_state))
@@ -8541,6 +8550,18 @@ void amdgpu_dm_connector_init_helper(struct amdgpu_display_manager *dm,
 		if (adev->dm.hdcp_workqueue)
 			drm_connector_attach_content_protection_property(&aconnector->base, true);
 	}
+
+	if (connector_type == DRM_MODE_CONNECTOR_eDP) {
+		struct drm_privacy_screen *privacy_screen;
+
+		privacy_screen = drm_privacy_screen_get(adev_to_drm(adev)->dev, NULL);
+		if (!IS_ERR(privacy_screen)) {
+			drm_connector_attach_privacy_screen_provider(&aconnector->base,
+								     privacy_screen);
+		} else if (PTR_ERR(privacy_screen) != -ENODEV) {
+			drm_warn(adev_to_drm(adev), "Error getting privacy-screen\n");
+		}
+	}
 }
 
 static int amdgpu_dm_i2c_xfer(struct i2c_adapter *i2c_adap,
@@ -10265,7 +10286,7 @@ static void amdgpu_dm_atomic_commit_tail(struct drm_atomic_state *state)
 	unsigned long flags;
 	bool wait_for_vblank = true;
 	struct drm_connector *connector;
-	struct drm_connector_state *old_con_state, *new_con_state;
+	struct drm_connector_state *old_con_state = NULL, *new_con_state = NULL;
 	struct dm_crtc_state *dm_old_crtc_state, *dm_new_crtc_state;
 	int crtc_disable_count = 0;
 
@@ -10383,6 +10404,8 @@ static void amdgpu_dm_atomic_commit_tail(struct drm_atomic_state *state)
 					    &stream_update);
 		mutex_unlock(&dm->dc_lock);
 		kfree(dummy_updates);
+
+		drm_connector_update_privacy_screen(new_con_state);
 	}
 
 	/**
-- 
2.43.0