From e90eab494007eab77408ec4eb62cf851e19911bb Mon Sep 17 00:00:00 2001
From: Christopher Michael <devilhorns@comcast.net>
Date: Sun, 21 Aug 2022 11:12:45 -0400
Subject: [PATCH] ecore-drm2: Add structures for Atomic Modesetting support

---
 src/lib/ecore_drm2/ecore_drm2_private.h | 112 +++++++++++++++++++++++-
 1 file changed, 110 insertions(+), 2 deletions(-)

diff --git a/src/lib/ecore_drm2/ecore_drm2_private.h b/src/lib/ecore_drm2/ecore_drm2_private.h
index 8b53561174..fb73b72e6c 100644
--- a/src/lib/ecore_drm2/ecore_drm2_private.h
+++ b/src/lib/ecore_drm2/ecore_drm2_private.h
@@ -31,7 +31,7 @@
 /* define necessary vars/macros for ecore_drm2 log domain */
 extern int _ecore_drm2_log_dom;
 
-/* define externval variable for atomic */
+/* define external variable for atomic usage */
 extern Eina_Bool _ecore_drm2_atomic_use;
 
 # ifdef ECORE_DRM2_DEFAULT_LOG_COLOR
@@ -64,12 +64,105 @@ extern Eina_Bool _ecore_drm2_atomic_use;
 # endif
 # define CRIT(...) EINA_LOG_DOM_CRIT(_ecore_drm2_log_dom, __VA_ARGS__)
 
-/* internal structures */
+/* internal structures (not exposed) */
+typedef struct _Ecore_Drm2_Atomic_Blob
+{
+   uint32_t id, value;
+   size_t len;
+   void *data;
+} Ecore_Drm2_Atomic_Blob;
+
+typedef struct _Ecore_Drm2_Atomic_Property
+{
+   uint32_t id;
+   uint64_t value;
+} Ecore_Drm2_Atomic_Property;
+
+typedef struct _Ecore_Drm2_Connector_State
+{
+   uint32_t obj_id;
+   Ecore_Drm2_Atomic_Property crtc;
+   Ecore_Drm2_Atomic_Property dpms;
+   Ecore_Drm2_Atomic_Property aspect;
+   Ecore_Drm2_Atomic_Property scaling;
+   Ecore_Drm2_Atomic_Blob edid;
+
+   /* TODO ?? */
+   /* Ecore_Drm2_Atomic_Property link-status; */
+   /* Ecore_Drm2_Atomic_Property non-desktop; */
+   /* Ecore_Drm2_Atomic_Property TILE; */
+   /* Ecore_Drm2_Atomic_Property underscan; */
+   /* Ecore_Drm2_Atomic_Property underscan hborder; */
+   /* Ecore_Drm2_Atomic_Property underscan vborder; */
+   /* Ecore_Drm2_Atomic_Property max bpc; */
+   /* Ecore_Drm2_Atomic_Property HDR_OUTPUT_METADATA; */
+   /* Ecore_Drm2_Atomic_Property vrr_capable; */
+   /* Ecore_Drm2_Atomic_Property Content Protection; */
+   /* Ecore_Drm2_Atomic_Property HDCP Content Type; */
+   /* Ecore_Drm2_Atomic_Property subconnector; */
+
+} Ecore_Drm2_Connector_State;
+
+typedef struct _Ecore_Drm2_Crtc_State
+{
+   uint32_t obj_id;
+   int index;
+   Ecore_Drm2_Atomic_Property active;
+   Ecore_Drm2_Atomic_Blob mode;
+
+   /* TODO ?? */
+   /* Ecore_Drm2_Atomic_Property background; */
+   /* Ecore_Drm2_Atomic_Property OUT_FENCE_PTR; */
+   /* Ecore_Drm2_Atomic_Property VRR_ENABLED; */
+   /* Ecore_Drm2_Atomic_Property DEGAMMA_LUT; */
+   /* Ecore_Drm2_Atomic_Property DEGAMMA_LUT_SIZE; */
+   /* Ecore_Drm2_Atomic_Property CTM; */
+   /* Ecore_Drm2_Atomic_Property GAMMA_LUT; */
+   /* Ecore_Drm2_Atomic_Property GAMMA_LUT_SIZE; */
+} Ecore_Drm2_Crtc_State;
+
+typedef struct _Ecore_Drm2_Plane_State
+{
+   uint32_t obj_id, mask;
+   Ecore_Drm2_Atomic_Property type;
+   Ecore_Drm2_Atomic_Property cid, fid;
+   Ecore_Drm2_Atomic_Property sx, sy, sw, sh;
+   Ecore_Drm2_Atomic_Property cx, cy, cw, ch;
+   Ecore_Drm2_Atomic_Property rotation;
+
+   /* NB: these are not part of an atomic state, but we store these here
+    * so that we do not have to refetch properties when iterating planes */
+   uint32_t rotation_map[6];
+   uint32_t supported_rotations;
+
+   uint32_t num_formats;
+   uint32_t *formats;
+
+   Eina_Bool in_use;
+
+   /* TODO ?? */
+   /* Ecore_Drm2_Atomic_Property IN_FENCE_FD; */
+   /* Ecore_Drm2_Atomic_Property IN_FORMATS; */
+   /* Ecore_Drm2_Atomic_Property COLOR_ENCODING; */
+   /* Ecore_Drm2_Atomic_Property COLOR_RANGE; */
+} Ecore_Drm2_Plane_State;
+
+typedef struct _Ecore_Drm2_Atomic_State
+{
+   int crtcs, conns, planes;
+   Ecore_Drm2_Crtc_State *crtc_states;
+   Ecore_Drm2_Connector_State *conn_states;
+   Ecore_Drm2_Plane_State *plane_states;
+} Ecore_Drm2_Atomic_State;
+
+/* opaque API structures */
 struct _Ecore_Drm2_Device
 {
    Elput_Manager *em;
 
    int fd;
+
+   Ecore_Drm2_Atomic_State *atomic_state;
 };
 
 struct _Ecore_Drm2_Output
@@ -77,9 +170,24 @@ struct _Ecore_Drm2_Output
    Eina_Stringshare *name, *make, *model, *serial;
 };
 
+/* internal function prototypes */
+Eina_Bool _ecore_drm2_atomic_state_fill(Ecore_Drm2_Atomic_State *state, int fd);
+
 /* external drm function prototypes (for dlopen) */
 extern void *(*sym_drmModeGetResources)(int fd);
 extern void (*sym_drmModeFreeResources)(drmModeResPtr ptr);
 extern int (*sym_drmSetClientCap)(int fd, uint64_t capability, uint64_t value);
+extern void *(*sym_drmModeGetProperty)(int fd, uint32_t propertyId);
+extern void (*sym_drmModeFreeProperty)(drmModePropertyPtr ptr);
+extern void *(*sym_drmModeGetPropertyBlob)(int fd, uint32_t blob_id);
+extern void (*sym_drmModeFreePropertyBlob)(drmModePropertyBlobPtr ptr);
+extern int (*sym_drmModeCreatePropertyBlob)(int fd, const void *data, size_t size, uint32_t *id);
+extern int (*sym_drmModeDestroyPropertyBlob)(int fd, uint32_t id);
+extern void *(*sym_drmModeObjectGetProperties)(int fd, uint32_t object_id, uint32_t object_type);
+extern void (*sym_drmModeFreeObjectProperties)(drmModeObjectPropertiesPtr ptr);
+extern void *(*sym_drmModeGetPlaneResources)(int fd);
+extern void (*sym_drmModeFreePlaneResources)(drmModePlaneResPtr ptr);
+extern void *(*sym_drmModeGetPlane)(int fd, uint32_t plane_id);
+extern void (*sym_drmModeFreePlane)(drmModePlanePtr ptr);
 
 #endif