drm: add plane support v3

Planes are a bit like half-CRTCs.  They have a location and fb, but
don't drive outputs directly.  Add support for handling them to the core
KMS code.

v2: fix ABI of get_plane - move format_type_ptr to the end
v3: add 'flags' field for interlaced support (from Ville)

Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Reviewed-by: Rob Clark <rob.clark@linaro.org>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>

3 files changed, 119 insertions, 6 deletions

diff --git a/include/drm/drm.h b/include/drm/drm.h
index 4be33b4ca2f8..28979677f94e 100644
--- a/include/drm/drm.h
+++ b/include/drm/drm.h
@@ -714,6 +714,9 @@ struct drm_get_cap {
 #define DRM_IOCTL_MODE_CREATE_DUMB DRM_IOWR(0xB2, struct drm_mode_create_dumb)
 #define DRM_IOCTL_MODE_MAP_DUMB    DRM_IOWR(0xB3, struct drm_mode_map_dumb)
 #define DRM_IOCTL_MODE_DESTROY_DUMB    DRM_IOWR(0xB4, struct drm_mode_destroy_dumb)
+#define DRM_IOCTL_MODE_GETPLANERESOURCES DRM_IOWR(0xB5, struct drm_mode_get_plane_res)
+#define DRM_IOCTL_MODE_GETPLANE DRM_IOWR(0xB6, struct drm_mode_get_plane)
+#define DRM_IOCTL_MODE_SETPLANE DRM_IOWR(0xB7, struct drm_mode_set_plane)
 
 /**
  * Device specific ioctls should only be in their respective headers
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 802079809282..e20867ed7c90 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -44,6 +44,7 @@ struct drm_framebuffer;
 #define DRM_MODE_OBJECT_PROPERTY 0xb0b0b0b0
 #define DRM_MODE_OBJECT_FB 0xfbfbfbfb
 #define DRM_MODE_OBJECT_BLOB 0xbbbbbbbb
+#define DRM_MODE_OBJECT_PLANE 0xeeeeeeee
 
 struct drm_mode_object {
         uint32_t id;
@@ -278,6 +279,7 @@ struct drm_crtc;
 struct drm_connector;
 struct drm_encoder;
 struct drm_pending_vblank_event;
+struct drm_plane;
 
 /**
  * drm_crtc_funcs - control CRTCs for a given device
@@ -536,6 +538,62 @@ struct drm_connector {
 };
 
 /**
+ * drm_plane_funcs - driver plane control functions
+ * @update_plane: update the plane configuration
+ * @disable_plane: shut down the plane
+ * @destroy: clean up plane resources
+ */
+struct drm_plane_funcs {
+        int (*update_plane)(struct drm_plane *plane,
+                            struct drm_crtc *crtc, struct drm_framebuffer *fb,
+                            int crtc_x, int crtc_y,
+                            unsigned int crtc_w, unsigned int crtc_h,
+                            uint32_t src_x, uint32_t src_y,
+                            uint32_t src_w, uint32_t src_h);
+        int (*disable_plane)(struct drm_plane *plane);
+        void (*destroy)(struct drm_plane *plane);
+};
+
+/**
+ * drm_plane - central DRM plane control structure
+ * @dev: DRM device this plane belongs to
+ * @head: for list management
+ * @base: base mode object
+ * @possible_crtcs: pipes this plane can be bound to
+ * @format_types: array of formats supported by this plane
+ * @format_count: number of formats supported
+ * @crtc: currently bound CRTC
+ * @fb: currently bound fb
+ * @gamma_size: size of gamma table
+ * @gamma_store: gamma correction table
+ * @enabled: enabled flag
+ * @funcs: helper functions
+ * @helper_private: storage for drver layer
+ */
+struct drm_plane {
+        struct drm_device *dev;
+        struct list_head head;
+
+        struct drm_mode_object base;
+
+        uint32_t possible_crtcs;
+        uint32_t *format_types;
+        uint32_t format_count;
+
+        struct drm_crtc *crtc;
+        struct drm_framebuffer *fb;
+
+        /* CRTC gamma size for reporting to userspace */
+        uint32_t gamma_size;
+        uint16_t *gamma_store;
+
+        bool enabled;
+
+        const struct drm_plane_funcs *funcs;
+        void *helper_private;
+};
+
+/**
  * struct drm_mode_set
  *
  * Represents a single crtc the connectors that it drives with what mode
@@ -589,6 +647,8 @@ struct drm_mode_config {
         struct list_head connector_list;
         int num_encoder;
         struct list_head encoder_list;
+        int num_plane;
+        struct list_head plane_list;
 
         int num_crtc;
         struct list_head crtc_list;
@@ -641,6 +701,7 @@ struct drm_mode_config {
 #define obj_to_fb(x) container_of(x, struct drm_framebuffer, base)
 #define obj_to_property(x) container_of(x, struct drm_property, base)
 #define obj_to_blob(x) container_of(x, struct drm_property_blob, base)
+#define obj_to_plane(x) container_of(x, struct drm_plane, base)
 
 
 extern void drm_crtc_init(struct drm_device *dev,
@@ -660,6 +721,13 @@ extern void drm_encoder_init(struct drm_device *dev,
                              const struct drm_encoder_funcs *funcs,
                              int encoder_type);
 
+extern int drm_plane_init(struct drm_device *dev,
+                          struct drm_plane *plane,
+                          unsigned long possible_crtcs,
+                          const struct drm_plane_funcs *funcs,
+                          uint32_t *formats, uint32_t format_count);
+extern void drm_plane_cleanup(struct drm_plane *plane);
+
 extern void drm_encoder_cleanup(struct drm_encoder *encoder);
 
 extern char *drm_get_connector_name(struct drm_connector *connector);
@@ -753,13 +821,18 @@ extern struct drm_mode_object *drm_mode_object_find(struct drm_device *dev,
 /* IOCTLs */
 extern int drm_mode_getresources(struct drm_device *dev,
                                  void *data, struct drm_file *file_priv);
-
+extern int drm_mode_getplane_res(struct drm_device *dev, void *data,
+                                   struct drm_file *file_priv);
 extern int drm_mode_getcrtc(struct drm_device *dev,
                             void *data, struct drm_file *file_priv);
 extern int drm_mode_getconnector(struct drm_device *dev,
                               void *data, struct drm_file *file_priv);
 extern int drm_mode_setcrtc(struct drm_device *dev,
                             void *data, struct drm_file *file_priv);
+extern int drm_mode_getplane(struct drm_device *dev,
+                               void *data, struct drm_file *file_priv);
+extern int drm_mode_setplane(struct drm_device *dev,
+                               void *data, struct drm_file *file_priv);
 extern int drm_mode_cursor_ioctl(struct drm_device *dev,
                                 void *data, struct drm_file *file_priv);
 extern int drm_mode_addfb(struct drm_device *dev,
diff --git a/include/drm/drm_mode.h b/include/drm/drm_mode.h
index d30bedfeb7ef..44576a54dc3b 100644
--- a/include/drm/drm_mode.h
+++ b/include/drm/drm_mode.h
@@ -120,11 +120,48 @@ struct drm_mode_crtc {
         struct drm_mode_modeinfo mode;
 };
 
-#define DRM_MODE_ENCODER_NONE    0
-#define DRM_MODE_ENCODER_DAC     1
-#define DRM_MODE_ENCODER_TMDS    2
-#define DRM_MODE_ENCODER_LVDS    3
-#define DRM_MODE_ENCODER_TVDAC   4
+#define DRM_MODE_PRESENT_TOP_FIELD      (1<<0)
+#define DRM_MODE_PRESENT_BOTTOM_FIELD   (1<<1)
+
+/* Planes blend with or override other bits on the CRTC */
+struct drm_mode_set_plane {
+        __u32 plane_id;
+        __u32 crtc_id;
+        __u32 fb_id; /* fb object contains surface format type */
+        __u32 flags; /* see above flags */
+
+        /* Signed dest location allows it to be partially off screen */
+        __s32 crtc_x, crtc_y;
+        __u32 crtc_w, crtc_h;
+
+        /* Source values are 16.16 fixed point */
+        __u32 src_x, src_y;
+        __u32 src_h, src_w;
+};
+
+struct drm_mode_get_plane {
+        __u32 plane_id;
+
+        __u32 crtc_id;
+        __u32 fb_id;
+
+        __u32 possible_crtcs;
+        __u32 gamma_size;
+
+        __u32 count_format_types;
+        __u64 format_type_ptr;
+};
+
+struct drm_mode_get_plane_res {
+        __u64 plane_id_ptr;
+        __u32 count_planes;
+};
+
+#define DRM_MODE_ENCODER_NONE   0
+#define DRM_MODE_ENCODER_DAC    1
+#define DRM_MODE_ENCODER_TMDS   2
+#define DRM_MODE_ENCODER_LVDS   3
+#define DRM_MODE_ENCODER_TVDAC  4
 #define DRM_MODE_ENCODER_VIRTUAL 5
 
 struct drm_mode_get_encoder {