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From:   Melissa Wen <mwen@igalia.com>
To:     amd-gfx@lists.freedesktop.org,
        Harry Wentland <harry.wentland@amd.com>,
        Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>,
        sunpeng.li@amd.com, Alex Deucher <alexander.deucher@amd.com>,
        dri-devel@lists.freedesktop.org, maarten.lankhorst@linux.intel.com,
        mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com,
        daniel@ffwll.ch
Cc:     Joshua Ashton <joshua@froggi.es>,
        Sebastian Wick <sebastian.wick@redhat.com>,
        Xaver Hugl <xaver.hugl@gmail.com>,
        Shashank Sharma <Shashank.Sharma@amd.com>,
        Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>,
        sungjoon.kim@amd.com, Alex Hung <alex.hung@amd.com>,
        Melissa Wen <mwen@igalia.com>, linux-kernel@vger.kernel.org
Subject: [RFC PATCH 08/40] drm/drm_plane: track color mgmt changes per plane
Date:   Sun, 23 Apr 2023 13:10:20 -0100
Message-Id: <20230423141051.702990-9-mwen@igalia.com>
In-Reply-To: <20230423141051.702990-1-mwen@igalia.com>
References: <20230423141051.702990-1-mwen@igalia.com>
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We will add color mgmt properties to DRM planes in the text patches and
we want to track when one of this properties change to define atomic
commit behaviors. Using a similar approach from CRTC color props, we set
a color_mgmt_changed boolean whenever a plane color prop changes.

Signed-off-by: Melissa Wen <mwen@igalia.com>
---
 drivers/gpu/drm/drm_atomic.c              | 1 +
 drivers/gpu/drm/drm_atomic_state_helper.c | 1 +
 include/drm/drm_plane.h                   | 7 +++++++
 3 files changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index c0dc5858a723..da2429470c4f 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -724,6 +724,7 @@ static void drm_atomic_plane_print_state(struct drm_printer *p,
 		   drm_get_color_encoding_name(state->color_encoding));
 	drm_printf(p, "\tcolor-range=%s\n",
 		   drm_get_color_range_name(state->color_range));
+	drm_printf(p, "\tcolor_mgmt_changed=%d\n", state->color_mgmt_changed);
 
 	if (plane->funcs->atomic_print_state)
 		plane->funcs->atomic_print_state(p, state);
diff --git a/drivers/gpu/drm/drm_atomic_state_helper.c b/drivers/gpu/drm/drm_atomic_state_helper.c
index dfb57217253b..3df4c96a902e 100644
--- a/drivers/gpu/drm/drm_atomic_state_helper.c
+++ b/drivers/gpu/drm/drm_atomic_state_helper.c
@@ -338,6 +338,7 @@ void __drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane,
 	state->fence = NULL;
 	state->commit = NULL;
 	state->fb_damage_clips = NULL;
+	state->color_mgmt_changed = false;
 }
 EXPORT_SYMBOL(__drm_atomic_helper_plane_duplicate_state);
 
diff --git a/include/drm/drm_plane.h b/include/drm/drm_plane.h
index 447e664e49d5..6c97380b8c76 100644
--- a/include/drm/drm_plane.h
+++ b/include/drm/drm_plane.h
@@ -237,6 +237,13 @@ struct drm_plane_state {
 
 	/** @state: backpointer to global drm_atomic_state */
 	struct drm_atomic_state *state;
+
+	/**
+	 * @color_mgmt_changed: Color management properties have changed. Used
+	 * by the atomic helpers and drivers to steer the atomic commit control
+	 * flow.
+	 */
+	bool color_mgmt_changed : 1;
 };
 
 static inline struct drm_rect
-- 
2.39.2