linux-kernel - [PATCH 4/5] drm/atomic-helper: Consider RGB quantization changes to be mode changes

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Date:   Mon, 13 Apr 2020 23:40:25 +0200
From:   Yussuf Khalil <dev@...345.net>
To:     Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Cc:     Yussuf Khalil <dev@...345.net>
Subject: [PATCH 4/5] drm/atomic-helper: Consider RGB quantization changes to be mode changes

Ensure RGB quantization range changes are applied immediately.

Signed-off-by: Yussuf Khalil <dev@...345.net>
---
 drivers/gpu/drm/drm_atomic_helper.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index 85d163f16801..b74e90a2b214 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -686,6 +686,12 @@ drm_atomic_helper_check_modeset(struct drm_device *dev,
 			if (old_connector_state->max_requested_bpc !=
 			    new_connector_state->max_requested_bpc)
 				new_crtc_state->connectors_changed = true;
+
+			if (drm_connector_state_select_rgb_quantization_range(
+				old_connector_state, &new_crtc_state->mode) !=
+			    drm_connector_state_select_rgb_quantization_range(
+				new_connector_state, &new_crtc_state->mode))
+				new_crtc_state->mode_changed = true;
 		}
 
 		if (funcs->atomic_check)
-- 
2.26.0