linux-kernel - [PATCH v3 3/3] drm/tegra: plane: Support 180° rotation

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Date:   Thu, 18 Jun 2020 02:40:40 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Derek Basehore <dbasehore@...omium.org>,
        Sam Ravnborg <sam@...nborg.org>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Sean Paul <sean@...rly.run>, Daniel Vetter <daniel@...ll.ch>,
        Ville Syrjälä 
        <ville.syrjala@...ux.intel.com>,
        Emil Velikov <emil.l.velikov@...il.com>,
        Daniel Stone <daniel@...ishbar.org>
Cc:     dri-devel@...ts.freedesktop.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v3 3/3] drm/tegra: plane: Support 180° rotation

Combining horizontal and vertical reflections gives us 180 degrees of
rotation. Both reflection modes are already supported, and thus, we just
need to mark the 180 rotation mode as supported. The 180 rotation mode is
needed for devices like Nexus 7 tablet, which have display panel mounted
upside-down.

Signed-off-by: Dmitry Osipenko <digetx@...il.com>
---
 drivers/gpu/drm/tegra/dc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c
index f8149dc3b1b4..1a9a5f8bba34 100644
--- a/drivers/gpu/drm/tegra/dc.c
+++ b/drivers/gpu/drm/tegra/dc.c
@@ -816,6 +816,7 @@ static struct drm_plane *tegra_primary_plane_create(struct drm_device *drm,
 	err = drm_plane_create_rotation_property(&plane->base,
 						 DRM_MODE_ROTATE_0,
 						 DRM_MODE_ROTATE_0 |
+						 DRM_MODE_ROTATE_180 |
 						 DRM_MODE_REFLECT_X |
 						 DRM_MODE_REFLECT_Y);
 	if (err < 0)
@@ -1105,6 +1106,7 @@ static struct drm_plane *tegra_dc_overlay_plane_create(struct drm_device *drm,
 	err = drm_plane_create_rotation_property(&plane->base,
 						 DRM_MODE_ROTATE_0,
 						 DRM_MODE_ROTATE_0 |
+						 DRM_MODE_ROTATE_180 |
 						 DRM_MODE_REFLECT_X |
 						 DRM_MODE_REFLECT_Y);
 	if (err < 0)
-- 
2.26.0