linux-kernel - [RFC PATCH 30/40] drm/amd/display: mark plane as needing reset if plane color mgmt changes

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Message-Id: <20230423141051.702990-31-mwen@igalia.com>
Date:   Sun, 23 Apr 2023 13:10:42 -0100
From:   Melissa Wen <mwen@...lia.com>
To:     amd-gfx@...ts.freedesktop.org,
        Harry Wentland <harry.wentland@....com>,
        Rodrigo Siqueira <Rodrigo.Siqueira@....com>,
        sunpeng.li@....com, Alex Deucher <alexander.deucher@....com>,
        dri-devel@...ts.freedesktop.org, christian.koenig@....com,
        Xinhui.Pan@....com, airlied@...il.com, daniel@...ll.ch
Cc:     Joshua Ashton <joshua@...ggi.es>,
        Sebastian Wick <sebastian.wick@...hat.com>,
        Xaver Hugl <xaver.hugl@...il.com>,
        Shashank Sharma <Shashank.Sharma@....com>,
        Nicholas Kazlauskas <nicholas.kazlauskas@....com>,
        sungjoon.kim@....com, Alex Hung <alex.hung@....com>,
        Melissa Wen <mwen@...lia.com>, linux-kernel@...r.kernel.org
Subject: [RFC PATCH 30/40] drm/amd/display: mark plane as needing reset if plane color mgmt changes

We took a similar path for CRTC color mgmt changes, since we remap CRTC
degamma to plane/DPP block. Here we can use the status of
`plane->color_mgmt_changed` to detect when a plane color property
changed and recreate the plane accordingly.

Co-developed-by: Joshua Ashton <joshua@...ggi.es>
Signed-off-by: Joshua Ashton <joshua@...ggi.es>
Signed-off-by: Melissa Wen <mwen@...lia.com>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 3 +++
 1 file changed, 3 insertions(+)

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 760080e4a4da..1dac311cab67 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -9441,6 +9441,9 @@ static bool should_reset_plane(struct drm_atomic_state *state,
 	if (drm_atomic_crtc_needs_modeset(new_crtc_state))
 		return true;
 
+	if (new_plane_state->color_mgmt_changed)
+		return true;
+
 	/*
 	 * If there are any new primary or overlay planes being added or
 	 * removed then the z-order can potentially change. To ensure
-- 
2.39.2