linux-kernel - [PATCH v2] drm/tegra: plane: Keep 'dependent' blending state of unaffected planes

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Message-Id: <ebc6aef3f5cd7b9b9bb25ceff9e86e742390cfca.1521121707.git.digetx@gmail.com>
Date:   Thu, 15 Mar 2018 17:24:31 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Thierry Reding <thierry.reding@...il.com>
Cc:     dri-devel@...ts.freedesktop.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2] drm/tegra: plane: Keep 'dependent' blending state of unaffected planes

This way new state takes into account the current state of unaffected
(by the atomic commit) planes.

Signed-off-by: Dmitry Osipenko <digetx@...il.com>
---

v2: Dropped unrelated 'cleanup' changes and fixed
    s/state->dependent[i]/state->dependent[index]/ typo.

 drivers/gpu/drm/tegra/plane.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/tegra/plane.c b/drivers/gpu/drm/tegra/plane.c
index fc37dcf8c458..0784422cc5a2 100644
--- a/drivers/gpu/drm/tegra/plane.c
+++ b/drivers/gpu/drm/tegra/plane.c
@@ -315,9 +315,6 @@ void tegra_plane_check_dependent(struct tegra_plane *tegra,
 	unsigned int zpos[2];
 	unsigned int i;
 
-	for (i = 0; i < 3; i++)
-		state->dependent[i] = false;
-
 	for (i = 0; i < 2; i++)
 		zpos[i] = 0;
 
@@ -331,6 +328,8 @@ void tegra_plane_check_dependent(struct tegra_plane *tegra,
 
 		index = tegra_plane_get_overlap_index(tegra, p);
 
+		state->dependent[index] = false;
+
 		/*
 		 * If any of the other planes is on top of this plane and uses
 		 * a format with an alpha component, mark this plane as being
-- 
2.16.1