evas/software_x11: Restore legacy compatibility with old SLP DRM

I really REAAALLLY doubt that was necessary, but I'm still adding
these few changes for legacy compatibility.

This lib seriously should have had a stable API.

1 files changed, 60 insertions, 22 deletions

diff --git a/src/modules/evas/engines/software_x11/evas_xlib_swapper.c b/src/modules/evas/engines/software_x11/evas_xlib_swapper.c
index 57101283e4..bb05dd6b8b 100644
--- a/src/modules/evas/engines/software_x11/evas_xlib_swapper.c
+++ b/src/modules/evas/engines/software_x11/evas_xlib_swapper.c
@@ -300,12 +300,6 @@ evas_xlib_swapper_bit_order_get(X_Swapper *swp)
 #else
 
 
-
-
-
-
-
-
 // DRM/DRI buffer swapping+access (driver specific) /////////////////////
 
 static Eina_Bool tried = EINA_FALSE;
@@ -335,12 +329,19 @@ typedef union _tbm_bo_handle
    uint64_t u64;
 } tbm_bo_handle;
 
+
 static tbm_bo (*sym_tbm_bo_import) (tbm_bufmgr bufmgr, unsigned int key) = NULL;
 static tbm_bo_handle (*sym_tbm_bo_map) (tbm_bo bo, int device, int opt) = NULL;
 static int (*sym_tbm_bo_unmap)  (tbm_bo bo) = NULL;
 static void (*sym_tbm_bo_unref) (tbm_bo bo) = NULL;
 static tbm_bufmgr (*sym_tbm_bufmgr_init) (int fd) = NULL;
 static void (*sym_tbm_bufmgr_deinit) (tbm_bufmgr bufmgr) = NULL;
+
+// legacy compatibility
+static void *(*sym_drm_slp_bo_map) (tbm_bo bo, int device, int opt) = NULL;
+static int (*sym_drm_slp_bo_unmap)  (tbm_bo bo, int device) = NULL;
+static tbm_bufmgr (*sym_drm_slp_bufmgr_init) (int fd, void *arg) = NULL;
+
 ////////////////////////////////////
 // libdri2.so.0
 #define DRI2BufferBackLeft 1
@@ -400,7 +401,7 @@ static void (*sym_XFixesDestroyRegion) (Display *dpy, XID region) = NULL;
 typedef struct
 {
    unsigned int name;
-   tbm_bo   buf_bo;
+   tbm_bo       buf_bo;
 } Buffer;
 
 struct _X_Swapper
@@ -409,7 +410,7 @@ struct _X_Swapper
    Drawable    draw;
    Visual     *vis;
    int         w, h, depth;
-   tbm_bo  buf_bo;
+   tbm_bo      buf_bo;
    DRI2Buffer *buf;
    void       *buf_data;
    int         buf_w, buf_h;
@@ -426,6 +427,7 @@ static int dri2_major = 0, dri2_minor = 0;
 static int drm_fd = -1;
 static tbm_bufmgr bufmgr = NULL;
 static int swap_debug = -1;
+static Eina_Bool slp_mode = EINA_FALSE;
 
 static Eina_Bool
 _drm_init(Display *disp, int scr)
@@ -448,11 +450,14 @@ _drm_init(Display *disp, int scr)
         if (swap_debug) ERR("Can't load libdrm.so.2");
         goto err;
      }
+   slp_mode = EINA_FALSE;
    tbm_lib = dlopen("libtbm.so.1", RTLD_NOW | RTLD_LOCAL);
    if (!tbm_lib)
      {
         if (swap_debug) ERR("Can't load libtbm.so.1");
-        goto err;
+        tbm_lib = dlopen("libdrm_slp.so.1", RTLD_NOW | RTLD_LOCAL);
+        if (tbm_lib) slp_mode = EINA_TRUE;
+        else goto err;
      }
    dri_lib = dlopen("libdri2.so.0", RTLD_NOW | RTLD_LOCAL);
    if (!dri_lib)
@@ -477,12 +482,32 @@ _drm_init(Display *disp, int scr)
    
    SYM(drm_lib, drmGetMagic);
 
-   SYM(tbm_lib, tbm_bo_import);
-   SYM(tbm_lib, tbm_bo_map);
-   SYM(tbm_lib, tbm_bo_unmap);
-   SYM(tbm_lib, tbm_bo_unref);
-   SYM(tbm_lib, tbm_bufmgr_init);
-   SYM(tbm_lib, tbm_bufmgr_deinit);
+   if (!slp_mode)
+     {
+        SYM(tbm_lib, tbm_bo_import);
+        SYM(tbm_lib, tbm_bo_map);
+        SYM(tbm_lib, tbm_bo_unmap);
+        SYM(tbm_lib, tbm_bo_unref);
+        SYM(tbm_lib, tbm_bufmgr_init);
+        SYM(tbm_lib, tbm_bufmgr_deinit);
+     }
+   else
+     {
+        // Looking up the legacy DRM SLP symbols. I don't believe this will
+        // ever happen, this code is here "just in case".
+        sym_tbm_bo_import = dlsym(tbm_lib, "drm_slp_bo_import");
+        sym_drm_slp_bo_map = dlsym(tbm_lib, "drm_slp_bo_map");
+        sym_drm_slp_bo_unmap = dlsym(tbm_lib, "drm_slp_bo_unmap");
+        sym_tbm_bo_unref = dlsym(tbm_lib, "drm_slp_bo_unref");
+        sym_drm_slp_bufmgr_init = dlsym(tbm_lib, "drm_slp_bufmgr_init");
+        sym_tbm_bufmgr_deinit = dlsym(tbm_lib, "drm_slp_bufmgr_destroy");
+        if (!sym_tbm_bo_import || !sym_drm_slp_bo_map || !sym_drm_slp_bo_unmap ||
+            !sym_tbm_bo_unref || !sym_drm_slp_bufmgr_init || !sym_tbm_bufmgr_deinit)
+          {
+             ERR("Can't load symbols from libdrm_slp.so.1");
+             goto err;
+          }
+     }
 
    SYM(dri_lib, DRI2GetBuffers);
    SYM(dri_lib, DRI2QueryExtension);
@@ -545,7 +570,11 @@ _drm_init(Display *disp, int scr)
         goto err;
      }
    
-   if (!(bufmgr = sym_tbm_bufmgr_init(drm_fd)))
+   if (!slp_mode)
+     bufmgr = sym_tbm_bufmgr_init(drm_fd);
+   else
+     bufmgr = sym_drm_slp_bufmgr_init(drm_fd, NULL);
+   if (!bufmgr)
      {
         if (swap_debug) ERR("DRM bufmgr init failed");
         goto err;
@@ -757,11 +786,17 @@ evas_xlib_swapper_buffer_map(X_Swapper *swp, int *bpl, int *w, int *h)
           }
      }
 
-   tbm_bo_handle bo_handle;
-
-   bo_handle = sym_tbm_bo_map (swp->buf_bo, TBM_DEVICE_CPU, TBM_OPTION_READ | TBM_OPTION_WRITE);
-   /* If device is DEFAULT, 2D, 3D, MM,then swp->buf_data = bo_handle.u32 */
-   swp->buf_data = bo_handle.ptr;
+   if (!slp_mode)
+     {
+        tbm_bo_handle bo_handle;
+        bo_handle = sym_tbm_bo_map(swp->buf_bo, TBM_DEVICE_CPU, TBM_OPTION_READ | TBM_OPTION_WRITE);
+        /* If device is DEFAULT, 2D, 3D, MM,then swp->buf_data = bo_handle.u32 */
+        swp->buf_data = bo_handle.ptr;
+     }
+   else
+     {
+        swp->buf_data = sym_drm_slp_bo_map(swp->buf_bo, TBM_DEVICE_CPU, TBM_OPTION_READ | TBM_OPTION_WRITE);
+     }
 
    if (!swp->buf_data)
      {
@@ -786,7 +821,10 @@ void
 evas_xlib_swapper_buffer_unmap(X_Swapper *swp)
 {
    if (!swp->mapped) return;
-   sym_tbm_bo_unmap(swp->buf_bo);
+   if (!slp_mode)
+     sym_tbm_bo_unmap(swp->buf_bo);
+   else
+     sym_drm_slp_bo_unmap(swp->buf_bo, TBM_DEVICE_CPU);
    if (swap_debug) printf("Unmap buffer name %i\n", swp->buf->name);
    free(swp->buf);
    swp->buf = NULL;