[PATCH 03/22] drm/vkms: Introduce config for plane rotation

[Louis Chauvet <louis.chauvet@bootlin.com>]

VKMS driver supports all the rotation on planes, but for testing it can be
useful to only advertise few of them. This new configuration interface
will allow configuring the rotation per planes.

Signed-off-by: Louis Chauvet <louis.chauvet@bootlin.com>
---
 drivers/gpu/drm/vkms/vkms_config.c | 26 ++++++++++++++++++
 drivers/gpu/drm/vkms/vkms_config.h | 54 ++++++++++++++++++++++++++++++++++++++
 drivers/gpu/drm/vkms/vkms_plane.c  |  6 +++--
 3 files changed, 84 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/vkms/vkms_config.c b/drivers/gpu/drm/vkms/vkms_config.c
index ed172f800685..b8cabe6f6cf8 100644
--- a/drivers/gpu/drm/vkms/vkms_config.c
+++ b/drivers/gpu/drm/vkms/vkms_config.c
@@ -144,6 +144,22 @@ static bool valid_plane_number(const struct vkms_config *config)
 	return true;
 }
 
+static bool valid_plane_properties(const struct vkms_config *config)
+{
+	struct drm_device *dev = config->dev ? &config->dev->drm : NULL;
+	struct vkms_config_plane *plane_cfg;
+
+	vkms_config_for_each_plane(config, plane_cfg) {
+		if ((vkms_config_plane_get_default_rotation(plane_cfg) &
+		     vkms_config_plane_get_supported_rotations(plane_cfg)) !=
+		    vkms_config_plane_get_default_rotation(plane_cfg)) {
+			drm_info(dev, "Configured default rotation is not supported by the plane\n");
+			return false;
+		}
+	}
+	return true;
+}
+
 static bool valid_planes_for_crtc(const struct vkms_config *config,
 				  struct vkms_config_crtc *crtc_cfg)
 {
@@ -302,6 +318,9 @@ bool vkms_config_is_valid(const struct vkms_config *config)
 {
 	struct vkms_config_crtc *crtc_cfg;
 
+	if (!valid_plane_properties(config))
+		return false;
+
 	if (!valid_plane_number(config))
 		return false;
 
@@ -352,6 +371,10 @@ static int vkms_config_show(struct seq_file *m, void *data)
 			   vkms_config_plane_get_type(plane_cfg));
 		seq_printf(m, "\tname=%s\n",
 			   vkms_config_plane_get_name(plane_cfg));
+		seq_printf(m, "\tsupported rotations: 0x%x\n",
+			   vkms_config_plane_get_supported_rotations(plane_cfg));
+		seq_printf(m, "\tdefault rotation: 0x%x\n",
+			   vkms_config_plane_get_default_rotation(plane_cfg));
 	}
 
 	vkms_config_for_each_crtc(vkmsdev->config, crtc_cfg) {
@@ -393,6 +416,9 @@ struct vkms_config_plane *vkms_config_create_plane(struct vkms_config *config)
 	plane_cfg->config = config;
 	vkms_config_plane_set_type(plane_cfg, DRM_PLANE_TYPE_OVERLAY);
 	vkms_config_plane_set_name(plane_cfg, NULL);
+	vkms_config_plane_set_supported_rotations(plane_cfg, DRM_MODE_ROTATE_MASK);
+	vkms_config_plane_set_default_rotation(plane_cfg, DRM_MODE_ROTATE_0);
+
 	xa_init_flags(&plane_cfg->possible_crtcs, XA_FLAGS_ALLOC);
 
 	list_add_tail(&plane_cfg->link, &config->planes);
diff --git a/drivers/gpu/drm/vkms/vkms_config.h b/drivers/gpu/drm/vkms/vkms_config.h
index b69c35097ba0..3c3cbefcc67f 100644
--- a/drivers/gpu/drm/vkms/vkms_config.h
+++ b/drivers/gpu/drm/vkms/vkms_config.h
@@ -39,6 +39,8 @@ struct vkms_config {
  * @type: Type of the plane. The creator of configuration needs to ensures that
  *        at least one primary plane is present.
  * @possible_crtcs: Array of CRTCs that can be used with this plane
+ * @default_rotation: Default rotation that should be used by this plane
+ * @supported_rotation: Rotation that this plane will support
  * @plane: Internal usage. This pointer should never be considered as valid.
  *         It can be used to store a temporary reference to a VKMS plane during
  *         device creation. This pointer is not managed by the configuration and
@@ -50,6 +52,8 @@ struct vkms_config_plane {
 
 	const char *name;
 	enum drm_plane_type type;
+	unsigned int default_rotation;
+	unsigned int supported_rotations;
 	struct xarray possible_crtcs;
 
 	/* Internal usage */
@@ -290,6 +294,56 @@ vkms_config_plane_set_type(struct vkms_config_plane *plane_cfg,
 	plane_cfg->type = type;
 }
 
+/**
+ * vkms_config_plane_get_default_rotation() - Get the default rotation for a plane
+ * @plane_cfg: Plane to get the default rotation from
+ *
+ * Returns:
+ * The default rotation for the plane.
+ */
+static inline unsigned int
+vkms_config_plane_get_default_rotation(struct vkms_config_plane *plane_cfg)
+{
+	return plane_cfg->default_rotation;
+}
+
+/**
+ * vkms_config_plane_set_default_rotation() - Set the default rotation for a plane
+ * @plane_cfg: Plane to set the default rotation to
+ * @default_rotation: New default rotation for the plane
+ */
+static inline void
+vkms_config_plane_set_default_rotation(struct vkms_config_plane *plane_cfg,
+				       unsigned int default_rotation)
+{
+	plane_cfg->default_rotation = default_rotation;
+}
+
+/**
+ * vkms_config_plane_get_supported_rotations() - Get the supported rotations for a plane
+ * @plane_cfg: Plane to get the supported rotations from
+ *
+ * Returns:
+ * The supported rotations for the plane.
+ */
+static inline unsigned int
+vkms_config_plane_get_supported_rotations(struct vkms_config_plane *plane_cfg)
+{
+	return plane_cfg->supported_rotations;
+}
+
+/**
+ * vkms_config_plane_set_supported_rotations() - Set the supported rotations for a plane
+ * @plane_cfg: Plane to set the supported rotations to
+ * @supported_rotations: New supported rotations for the plane
+ */
+static inline void
+vkms_config_plane_set_supported_rotations(struct vkms_config_plane *plane_cfg,
+					  unsigned int supported_rotations)
+{
+	plane_cfg->supported_rotations = supported_rotations;
+}
+
 /**
  * vkms_config_plane_set_name() - Set the plane name
  * @plane_cfg: Plane to set the name to
diff --git a/drivers/gpu/drm/vkms/vkms_plane.c b/drivers/gpu/drm/vkms/vkms_plane.c
index 263376686794..6e6bfe1b7400 100644
--- a/drivers/gpu/drm/vkms/vkms_plane.c
+++ b/drivers/gpu/drm/vkms/vkms_plane.c
@@ -1,5 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0+
 
+#include "vkms_config.h"
 #include <linux/iosys-map.h>
 
 #include <drm/drm_atomic.h>
@@ -233,8 +234,9 @@ struct vkms_plane *vkms_plane_init(struct vkms_device *vkmsdev,
 
 	drm_plane_helper_add(&plane->base, &vkms_plane_helper_funcs);
 
-	drm_plane_create_rotation_property(&plane->base, DRM_MODE_ROTATE_0,
-					   DRM_MODE_ROTATE_MASK | DRM_MODE_REFLECT_MASK);
+	drm_plane_create_rotation_property(&plane->base,
+					   vkms_config_plane_get_default_rotation(config),
+					   vkms_config_plane_get_supported_rotations(config));
 
 	drm_plane_create_color_properties(&plane->base,
 					  BIT(DRM_COLOR_YCBCR_BT601) |

-- 
2.51.0