950-0912-drm-atomic-If-margins-are-updated-update-all-planes.patch

From 75b6b04cdb54b2e91c0fd344ffc967ce64ddccd7 Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.com>
Date: Fri, 1 Apr 2022 17:10:37 +0100
Subject: [PATCH] drm/atomic: If margins are updated, update all
 planes.

Margins may be implemented by scaling the planes, but as there
is no way of intercepting the set_property for a standard property,
and all planes are checked in drm_atomic_check_only before the
connectors, there's now way to add the planes into the state
from the driver.

If the margin properties change, add all corresponding planes to
the state.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
---
 drivers/gpu/drm/drm_atomic_uapi.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

--- a/drivers/gpu/drm/drm_atomic_uapi.c
+++ b/drivers/gpu/drm/drm_atomic_uapi.c
@@ -715,6 +715,7 @@ static int drm_atomic_connector_set_prop
 {
 	struct drm_device *dev = connector->dev;
 	struct drm_mode_config *config = &dev->mode_config;
+	bool margins_updated = false;
 	bool replaced = false;
 	int ret;
 
@@ -734,12 +735,16 @@ static int drm_atomic_connector_set_prop
 		state->tv.subconnector = val;
 	} else if (property == config->tv_left_margin_property) {
 		state->tv.margins.left = val;
+		margins_updated = true;
 	} else if (property == config->tv_right_margin_property) {
 		state->tv.margins.right = val;
+		margins_updated = true;
 	} else if (property == config->tv_top_margin_property) {
 		state->tv.margins.top = val;
+		margins_updated = true;
 	} else if (property == config->tv_bottom_margin_property) {
 		state->tv.margins.bottom = val;
+		margins_updated = true;
 	} else if (property == config->tv_mode_property) {
 		state->tv.mode = val;
 	} else if (property == config->tv_brightness_property) {
@@ -818,6 +823,12 @@ static int drm_atomic_connector_set_prop
 		return -EINVAL;
 	}
 
+	if (margins_updated && state->crtc) {
+		ret = drm_atomic_add_affected_planes(state->state, state->crtc);
+
+		return ret;
+	}
+
 	return 0;
 }