kmsdrm: Add error control to plane prop setting function. Do most plane prop setting with a single function.

src/video/kmsdrm/SDL_kmsdrmmouse.c

@@ -43,58 +43,6 @@ static int KMSDRM_WarpMouseGlobal(int x, int y);
 /* Atomic helper functions block. */
 /**********************************/
 
-int
-drm_atomic_setcursor(KMSDRM_CursorData *curdata, int x, int y)
-{
-    KMSDRM_FBInfo *fb;
-    SDL_DisplayData *dispdata = (SDL_DisplayData *)SDL_GetDisplayDriverData(0);
-
-    /* Do we have a set of changes already in the making? If not, allocate a new one. */
-    if (!dispdata->atomic_req)
-        dispdata->atomic_req = KMSDRM_drmModeAtomicAlloc();
-    
-    if (curdata)
-    {
-	if (!dispdata->cursor_plane) {
-	    setup_plane(curdata->video, &(dispdata->cursor_plane), DRM_PLANE_TYPE_CURSOR);
-            /* "curdata->video" is the _THIS pointer, which points to an SDL_Display, as passed from kmsdrmmouse.c */
-	}
-
-        fb = KMSDRM_FBFromBO(curdata->video, curdata->bo);
-        add_plane_property(dispdata->atomic_req, dispdata->cursor_plane, "FB_ID", fb->fb_id);
-        add_plane_property(dispdata->atomic_req, dispdata->cursor_plane, "CRTC_ID", dispdata->crtc->crtc->crtc_id);
-       
-        add_plane_property(dispdata->atomic_req, dispdata->cursor_plane, "SRC_X", 0);
-	add_plane_property(dispdata->atomic_req, dispdata->cursor_plane, "SRC_Y", 0);
-	add_plane_property(dispdata->atomic_req, dispdata->cursor_plane, "SRC_W", curdata->w << 16);
-	add_plane_property(dispdata->atomic_req, dispdata->cursor_plane, "SRC_H", curdata->h << 16);
-        add_plane_property(dispdata->atomic_req, dispdata->cursor_plane, "CRTC_X", x);
-        add_plane_property(dispdata->atomic_req, dispdata->cursor_plane, "CRTC_Y", y);
-	add_plane_property(dispdata->atomic_req, dispdata->cursor_plane, "CRTC_W", curdata->w);
-	add_plane_property(dispdata->atomic_req, dispdata->cursor_plane, "CRTC_H", curdata->h);
-    }
-    else if (dispdata->cursor_plane) /* Don't go further if plane has already been freed. */
-    { 
-	add_plane_property(dispdata->atomic_req, dispdata->cursor_plane, "FB_ID", 0);
-	add_plane_property(dispdata->atomic_req, dispdata->cursor_plane, "CRTC_ID", 0);
-
-	add_plane_property(dispdata->atomic_req, dispdata->cursor_plane, "SRC_X", 0);
-	add_plane_property(dispdata->atomic_req, dispdata->cursor_plane, "SRC_Y", 0);
-	add_plane_property(dispdata->atomic_req, dispdata->cursor_plane, "SRC_W", 0);
-	add_plane_property(dispdata->atomic_req, dispdata->cursor_plane, "SRC_H", 0);
-	add_plane_property(dispdata->atomic_req, dispdata->cursor_plane, "CRTC_W", 0);
-	add_plane_property(dispdata->atomic_req, dispdata->cursor_plane, "CRTC_H", 0);
-
-	free_plane(&dispdata->cursor_plane);
-    }
-
-     /* GPU <-> DISPLAY synchronization is done ON the display_plane,
-    so no need to set any fence props here, we do that only on the main
-    display plane.  */
-
-    return 0;
-}
-
 int
 drm_atomic_movecursor(KMSDRM_CursorData *curdata, int x, int y)
 {
@@ -140,7 +88,6 @@ void alpha_premultiply_ARGB8888 (uint32_t *pixel) {
     (*pixel) = (((uint32_t)A << 24) | ((uint32_t)R << 16) | ((uint32_t)G << 8)) | ((uint32_t)B << 0);
 }
 
-
 static SDL_Cursor *
 KMSDRM_CreateDefaultCursor(void)
 {
@@ -169,7 +116,7 @@ KMSDRM_CreateCursor(SDL_Surface * surface, int hot_x, int hot_y)
     SDL_assert(surface->pitch == surface->w * 4);
 
     if (!KMSDRM_gbm_device_is_format_supported(viddata->gbm_dev, GBM_FORMAT_ARGB8888, GBM_BO_USE_CURSOR | GBM_BO_USE_WRITE)) {
-        printf("Unsupported pixel format for cursor\n");
+        SDL_SetError("Unsupported pixel format for cursor");
         return NULL;
     }
 
@@ -291,6 +238,8 @@ KMSDRM_ShowCursor(SDL_Cursor * cursor)
     KMSDRM_CursorData *curdata;
     SDL_VideoDisplay *display = NULL;
     SDL_DisplayData *dispdata = NULL;
+    KMSDRM_FBInfo *fb;
+    KMSDRM_PlaneInfo info = {0};
     int ret;
 
     mouse = SDL_GetMouse();
@@ -305,18 +254,21 @@ KMSDRM_ShowCursor(SDL_Cursor * cursor)
         }
     }
 
-    /* Hide cursor */
+    /**********************************/
+    /* if cursor == NULL, HIDE cursor */
+    /**********************************/
     if (!cursor) {
         /* Hide CURRENT cursor, a cursor that is already on screen
            and SDL stores in mouse->cur_cursor. */
         if (mouse->cur_cursor && mouse->cur_cursor->driverdata) {
-            curdata = (KMSDRM_CursorData *) mouse->cur_cursor->driverdata;
-            if (curdata->video) {
-
-                ret = drm_atomic_setcursor(0, 0, 0); 
+            if (dispdata && dispdata->cursor_plane) {
+                info.plane = dispdata->cursor_plane; /* The rest of the members are zeroed. */
+                ret = drm_atomic_set_plane_props(&info); 
+                /* Free the plane on which the cursor was being shown. */
+	        free_plane(&dispdata->cursor_plane);
 
                 if (ret) {
-                    SDL_SetError("Could not hide current cursor with drm_atomic_setcursor).");
+                    SDL_SetError("Could not hide current cursor.");
                     return ret;
                 }
 
@@ -328,8 +280,10 @@ KMSDRM_ShowCursor(SDL_Cursor * cursor)
         return SDL_SetError("Couldn't find cursor to hide.");
     }
 
-    
-    /* If cursor != NULL, show new cursor on display */
+    /************************************************/
+    /* If cursor != NULL, DO show cursor on display */
+    /************************************************/
+
     if (!display) {
         return SDL_SetError("Could not get display for mouse.");
     }
@@ -338,15 +292,33 @@ KMSDRM_ShowCursor(SDL_Cursor * cursor)
     }
     
     curdata = (KMSDRM_CursorData *) cursor->driverdata;
+
     if (!curdata || !curdata->bo) {
         return SDL_SetError("Cursor not initialized properly.");
     }
 
     curdata->crtc_id  = dispdata->crtc->crtc->crtc_id;
-    curdata->video = video_device;
+    curdata->plane    = dispdata->cursor_plane;
+    curdata->video    = video_device;
+
+    /* Init cursor plane, if we haven't yet. */
+    if (!dispdata->cursor_plane) {
+	setup_plane(curdata->video, &(dispdata->cursor_plane), DRM_PLANE_TYPE_CURSOR);
+    }
+
+    fb = KMSDRM_FBFromBO(curdata->video, curdata->bo);
+
+    info.plane = dispdata->cursor_plane;
+    info.crtc_id = curdata->crtc_id;
+    info.fb_id = fb->fb_id; 
+    info.src_w = curdata->w;
+    info.src_h = curdata->h;
+    info.crtc_x = mouse->x - curdata->hot_x;
+    info.crtc_y = mouse->y - curdata->hot_y;
+    info.crtc_w = curdata->w;
+    info.crtc_h = curdata->h; 
 
-    /* DO show cursor */
-    ret = drm_atomic_setcursor(curdata, mouse->x - curdata->hot_x, mouse->y - curdata->hot_y);
+    ret = drm_atomic_set_plane_props(&info);
 
     if (ret) {
         SDL_SetError("KMSDRM_SetCursor failed.");
@@ -356,12 +328,12 @@ KMSDRM_ShowCursor(SDL_Cursor * cursor)
     return 0;
 }
 
-/* Unset the cursor from the cusror plane, and ONLY WHEN THAT'S DONE,
+/* Unset the cursor from the cursor plane, and ONLY WHEN THAT'S DONE,
    DONE FOR REAL, and not only requested, destroy it by destroying the curso BO.
    Destroying the cursor BO is an special an delicate situation,
-   because drm_atomic_setcursor() returns immediately, and we DON'T 
+   because drm_atomic_set_plane_props() returns immediately, and we DON'T 
    want to get to gbm_bo_destroy() before the prop changes requested
-   in drm_atomic_setcursor() have effectively been done. So we
+   in drm_atomic_set_plane_props() have effectively been done. So we
    issue a BLOCKING atomic_commit here to avoid that situation.
    REMEMBER you yan issue an atomic_commit whenever you want, and
    the changes requested until that moment (for any planes, crtcs, etc.)
@@ -371,12 +343,14 @@ KMSDRM_FreeCursor(SDL_Cursor * cursor)
 {
     KMSDRM_CursorData *curdata = NULL;
     SDL_VideoDevice *video = NULL;
+    KMSDRM_PlaneInfo info = {0};
 
     if (cursor) {
         curdata = (KMSDRM_CursorData *) cursor->driverdata;
         video = curdata->video;
-        if (video && curdata->bo) {
-	    drm_atomic_setcursor(0, 0, 0);
+        if (video && curdata->bo && curdata->plane) {
+            info.plane = curdata->plane; /* The other members are zeroed. */
+	    drm_atomic_set_plane_props(&info);
             /* Wait until the cursor is unset from the cursor plane before destroying it's BO. */
             drm_atomic_commit(video, SDL_TRUE);
 	    KMSDRM_gbm_bo_destroy(curdata->bo);
@@ -427,6 +401,7 @@ KMSDRM_WarpMouseGlobal(int x, int y)
     } else {
         return SDL_SetError("No mouse or current cursor.");
     }
+return 0;
 }
 
 void

src/video/kmsdrm/SDL_kmsdrmmouse.h

@@ -33,6 +33,7 @@
 typedef struct _KMSDRM_CursorData
 {
     struct gbm_bo *bo;
+    struct plane *plane;
     uint32_t       crtc_id;
     int            hot_x, hot_y;
     int            w, h;

src/video/kmsdrm/SDL_kmsdrmopengles.c

@@ -79,6 +79,7 @@ KMSDRM_GLES_SwapWindow(_THIS, SDL_Window * window)
     SDL_WindowData *windata = ((SDL_WindowData *) window->driverdata);
     SDL_DisplayData *dispdata = (SDL_DisplayData *) SDL_GetDisplayForWindow(window)->driverdata;
     KMSDRM_FBInfo *fb;
+    KMSDRM_PlaneInfo info = {0};
     int ret;
 
     /*************************************************************************/
@@ -108,25 +109,37 @@ KMSDRM_GLES_SwapWindow(_THIS, SDL_Window * window)
     /***************/
 
     /* Lock the buffer that is marked by eglSwapBuffers() to become the next front buffer (so it can not
-       be chosen by EGL as back buffer to draw on), and get a handle to it to request the pageflip on it. */
+       be chosen by EGL as back buffer to draw on), and get a handle to it to request the pageflip on it.
+       REMEMBER that gbm_surface_lock_front_buffer() ALWAYS has to be called after eglSwapBuffers(). */
     windata->next_bo = KMSDRM_gbm_surface_lock_front_buffer(windata->gs);
     if (!windata->next_bo) {
-	return SDL_SetError("Failed to lock frontbuffer on GBM surface destruction");
+	return SDL_SetError("Failed to lock frontbuffer");
     }
     fb = KMSDRM_FBFromBO(_this, windata->next_bo);
     if (!fb) {
-	 return SDL_SetError("Failed to get a new framebuffer on GBM surface destruction");
+	 return SDL_SetError("Failed to get a new framebuffer from BO");
     }
 
-    /* Add the pageflip to te request list. */
-    drm_atomic_setbuffer(_this, dispdata->display_plane, fb->fb_id, dispdata->crtc->crtc->crtc_id);
+    /* Add the pageflip to the request list. */
+    info.plane = dispdata->display_plane;
+    info.crtc_id = dispdata->crtc->crtc->crtc_id;
+    info.fb_id = fb->fb_id;
+    info.src_w = dispdata->mode.hdisplay;
+    info.src_h = dispdata->mode.vdisplay;
+    info.crtc_w = dispdata->mode.hdisplay;
+    info.crtc_h = dispdata->mode.vdisplay;
+
+    ret = drm_atomic_set_plane_props(&info);
+     if (ret) {
+        return SDL_SetError("Failed to request prop changes for setting plane buffer and CRTC");
+    }
 
     /* Issue the one and only atomic commit where all changes will be requested!.
        We need e a non-blocking atomic commit for triple buffering, because we 
        must not block on this atomic commit so we can re-enter program loop once more. */
     ret = drm_atomic_commit(_this, SDL_FALSE);
     if (ret) {
-        return SDL_SetError("failed to issue atomic commit on GBM surface destruction");
+        return SDL_SetError("Failed to issue atomic commit on pageflip");
     }
 
     /* Release the last front buffer so EGL can chose it as back buffer and render on it again. */
@@ -165,6 +178,7 @@ KMSDRM_GLES_SwapWindowDB(_THIS, SDL_Window * window)
     SDL_WindowData *windata = ((SDL_WindowData *) window->driverdata);
     SDL_DisplayData *dispdata = (SDL_DisplayData *) SDL_GetDisplayForWindow(window)->driverdata;
     KMSDRM_FBInfo *fb;
+    KMSDRM_PlaneInfo info = {0};
     int ret;
 
     /* In double-buffer mode, atomic commit will always be synchronous/blocking (ie: won't return until
@@ -187,15 +201,26 @@ KMSDRM_GLES_SwapWindowDB(_THIS, SDL_Window * window)
          return SDL_SetError("Failed to get a new framebuffer BO");
     }
 
-    /* Add the pageflip to te request list. */
-    drm_atomic_setbuffer(_this, dispdata->display_plane, fb->fb_id, dispdata->crtc->crtc->crtc_id);
+    /* Add the pageflip to the request list. */
+    info.plane = dispdata->display_plane;
+    info.crtc_id = dispdata->crtc->crtc->crtc_id;
+    info.fb_id = fb->fb_id;
+    info.src_w = dispdata->mode.hdisplay;
+    info.src_h = dispdata->mode.vdisplay;
+    info.crtc_w = dispdata->mode.hdisplay;
+    info.crtc_h = dispdata->mode.vdisplay;
+
+    ret = drm_atomic_set_plane_props(&info);
+     if (ret) {
+        return SDL_SetError("Failed to request prop changes for setting plane buffer and CRTC");
+    }
 
     /* Issue the one and only atomic commit where all changes will be requested!. 
        Blocking for double buffering: won't return until completed. */
     ret = drm_atomic_commit(_this, SDL_TRUE);
 
     if (ret) {
-        return SDL_SetError("failed to issue atomic commit");
+        return SDL_SetError("Failed to issue atomic commit");
     }
 
     /* Release last front buffer so EGL can chose it as back buffer and render on it again. */

src/video/kmsdrm/SDL_kmsdrmvideo.c

@@ -102,16 +102,15 @@ static int get_dricount(void)
     struct stat sb;
     DIR *folder;
 
-    if (!(stat(KMSDRM_DRI_PATH, &sb) == 0
-                && S_ISDIR(sb.st_mode))) {
-        printf("The path %s cannot be opened or is not available\n",
-               KMSDRM_DRI_PATH);
+    if (!(stat(KMSDRM_DRI_PATH, &sb) == 0 && S_ISDIR(sb.st_mode))) {
+        SDL_SetError("The path %s cannot be opened or is not available",
+        KMSDRM_DRI_PATH);
         return 0;
     }
 
     if (access(KMSDRM_DRI_PATH, F_OK) == -1) {
-        printf("The path %s cannot be opened\n",
-               KMSDRM_DRI_PATH);
+        SDL_SetError("The path %s cannot be opened",
+            KMSDRM_DRI_PATH);
         return 0;
     }
 
@@ -154,44 +153,44 @@ get_driindex(void)
 static int add_connector_property(drmModeAtomicReq *req, struct connector *connector,
 					const char *name, uint64_t value)
 {
-	unsigned int i;
-	int prop_id = 0;
+    unsigned int i;
+    int prop_id = 0;
 
-	for (i = 0 ; i < connector->props->count_props ; i++) {
-		if (strcmp(connector->props_info[i]->name, name) == 0) {
-			prop_id = connector->props_info[i]->prop_id;
-			break;
-		}
+    for (i = 0 ; i < connector->props->count_props ; i++) {
+	if (strcmp(connector->props_info[i]->name, name) == 0) {
+	    prop_id = connector->props_info[i]->prop_id;
+	    break;
 	}
+    }
 
-	if (prop_id < 0) {
-		printf("no connector property: %s\n", name);
-		return -EINVAL;
-	}
+    if (prop_id < 0) {
+	SDL_SetError("no connector property: %s", name);
+	return -EINVAL;
+    }
 
-	return KMSDRM_drmModeAtomicAddProperty(req, connector->connector->connector_id, prop_id, value);
+    return KMSDRM_drmModeAtomicAddProperty(req, connector->connector->connector_id, prop_id, value);
 }
 #endif
 
 static int add_crtc_property(drmModeAtomicReq *req, struct crtc *crtc,
 				const char *name, uint64_t value)
 {
-	unsigned int i;
-	int prop_id = -1;
+    unsigned int i;
+    int prop_id = -1;
 
-	for (i = 0 ; i < crtc->props->count_props ; i++) {
-		if (strcmp(crtc->props_info[i]->name, name) == 0) {
-			prop_id = crtc->props_info[i]->prop_id;
-			break;
-		}
+    for (i = 0 ; i < crtc->props->count_props ; i++) {
+	if (strcmp(crtc->props_info[i]->name, name) == 0) {
+	    prop_id = crtc->props_info[i]->prop_id;
+	    break;
 	}
+    }
 
-	if (prop_id < 0) {
-		printf("no crtc property: %s\n", name);
-		return -EINVAL;
-	}
+    if (prop_id < 0) {
+	SDL_SetError("no crtc property: %s", name);
+	return -EINVAL;
+    }
 
-	return KMSDRM_drmModeAtomicAddProperty(req, crtc->crtc->crtc_id, prop_id, value);
+    return KMSDRM_drmModeAtomicAddProperty(req, crtc->crtc->crtc_id, prop_id, value);
 }
 
 int add_plane_property(drmModeAtomicReq *req, struct plane *plane,
@@ -201,15 +200,15 @@ int add_plane_property(drmModeAtomicReq *req, struct plane *plane,
     int prop_id = -1;
 
     for (i = 0 ; i < plane->props->count_props ; i++) {
-	if (strcmp(plane->props_info[i]->name, name) == 0) {
-	    prop_id = plane->props_info[i]->prop_id;
-	    break;
-	}
+        if (strcmp(plane->props_info[i]->name, name) == 0) {
+        prop_id = plane->props_info[i]->prop_id;
+        break;
+        }
     }
 
     if (prop_id < 0) {
-	printf("no plane property: %s\n", name);
-	return -EINVAL;
+        SDL_SetError("no plane property: %s", name);
+        return -EINVAL;
     }
 
     return KMSDRM_drmModeAtomicAddProperty(req, plane->plane->plane_id, prop_id, value);
@@ -466,8 +465,8 @@ free_plane(struct plane **plane)
 /*   first, move the plane away from those buffers and ONLY THEN destroy the      */
 /*   buffers and/or the GBM surface containig them.                               */
 /**********************************************************************************/
-void
-drm_atomic_setbuffer(_THIS, struct plane *plane, uint32_t fb_id, uint32_t crtc_id)
+int
+drm_atomic_set_plane_props(struct KMSDRM_PlaneInfo *info)
 {
     SDL_DisplayData *dispdata = (SDL_DisplayData *)SDL_GetDisplayDriverData(0);
 
@@ -475,22 +474,40 @@ drm_atomic_setbuffer(_THIS, struct plane *plane, uint32_t fb_id, uint32_t crtc_i
     if (!dispdata->atomic_req)
         dispdata->atomic_req = KMSDRM_drmModeAtomicAlloc();
    
-    add_plane_property(dispdata->atomic_req, plane, "FB_ID", fb_id);
-    add_plane_property(dispdata->atomic_req, plane, "CRTC_ID", crtc_id);
-    add_plane_property(dispdata->atomic_req, plane, "SRC_W", dispdata->mode.hdisplay << 16);
-    add_plane_property(dispdata->atomic_req, plane, "SRC_H", dispdata->mode.vdisplay << 16);
-    add_plane_property(dispdata->atomic_req, plane, "SRC_X", 0);
-    add_plane_property(dispdata->atomic_req, plane, "SRC_Y", 0);
-    add_plane_property(dispdata->atomic_req, plane, "CRTC_W", dispdata->mode.hdisplay);
-    add_plane_property(dispdata->atomic_req, plane, "CRTC_H", dispdata->mode.vdisplay);
-    add_plane_property(dispdata->atomic_req, plane, "CRTC_X", 0);
-    add_plane_property(dispdata->atomic_req, plane, "CRTC_Y", 0);
-
-    if (dispdata->kms_in_fence_fd != -1) {
-	add_crtc_property(dispdata->atomic_req, dispdata->crtc, "OUT_FENCE_PTR",
-			  VOID2U64(&dispdata->kms_out_fence_fd));
-	add_plane_property(dispdata->atomic_req, plane, "IN_FENCE_FD", dispdata->kms_in_fence_fd);
+    if (add_plane_property(dispdata->atomic_req, info->plane, "FB_ID", info->fb_id) < 0)
+        return SDL_SetError("Failed to set plane FB_ID prop");
+    if (add_plane_property(dispdata->atomic_req, info->plane, "CRTC_ID", info->crtc_id) < 0)
+        return SDL_SetError("Failed to set plane CRTC_ID prop");
+    if (add_plane_property(dispdata->atomic_req, info->plane, "SRC_W", info->src_w << 16) < 0)
+        return SDL_SetError("Failed to set plane SRC_W prop");
+    if (add_plane_property(dispdata->atomic_req, info->plane, "SRC_H", info->src_h << 16) < 0)
+        return SDL_SetError("Failed to set plane SRC_H prop");
+    if (add_plane_property(dispdata->atomic_req, info->plane, "SRC_X", info->src_x) < 0)
+        return SDL_SetError("Failed to set plane SRC_X prop");
+    if (add_plane_property(dispdata->atomic_req, info->plane, "SRC_Y", info->src_y) < 0)
+        return SDL_SetError("Failed to set plane SRC_Y prop");
+    if (add_plane_property(dispdata->atomic_req, info->plane, "CRTC_W", info->crtc_w) < 0)
+        return SDL_SetError("Failed to set plane CRTC_W prop");
+    if (add_plane_property(dispdata->atomic_req, info->plane, "CRTC_H", info->crtc_h) < 0)
+        return SDL_SetError("Failed to set plane CRTC_H prop");
+    if (add_plane_property(dispdata->atomic_req, info->plane, "CRTC_X", info->crtc_x) < 0)
+        return SDL_SetError("Failed to set plane CRTC_X prop");
+    if (add_plane_property(dispdata->atomic_req, info->plane, "CRTC_Y", info->crtc_y) < 0)
+        return SDL_SetError("Failed to set plane CRTC_Y prop");
+
+    /* Only set the IN_FENCE aqnd OUT_FENCE props if we're operationg on the display plane,
+       since that's the only plane for which we manage who and when should access the buffers
+       it uses. */
+    if ((info->plane == dispdata->display_plane) && (dispdata->kms_in_fence_fd != -1))
+    {
+	if (add_crtc_property(dispdata->atomic_req, dispdata->crtc, "OUT_FENCE_PTR",
+			          VOID2U64(&dispdata->kms_out_fence_fd)) < 0)
+            return SDL_SetError("Failed to set CRTC OUT_FENCE_PTR prop");
+	if (add_plane_property(dispdata->atomic_req, info->plane, "IN_FENCE_FD", dispdata->kms_in_fence_fd) < 0)
+            return SDL_SetError("Failed to set plane IN_FENCE_FD prop");
     }
+
+    return 0;
 }
 
 int drm_atomic_commit(_THIS, SDL_bool blocking)
@@ -507,8 +524,9 @@ int drm_atomic_commit(_THIS, SDL_bool blocking)
 
     ret = KMSDRM_drmModeAtomicCommit(viddata->drm_fd, dispdata->atomic_req, dispdata->atomic_flags, NULL);
     if (ret) {
-        //SDL_SetError("Atomic commit failed, returned %d.", ret);
-        printf("ATOMIC COMMIT FAILED: %d.\n", ret);
+        SDL_SetError("Atomic commit failed, returned %d.", ret);
+        /* Uncomment this for fast-debugging */
+        //printf("ATOMIC COMMIT FAILED: %d.\n", ret);
 	goto out;
     }
 
@@ -753,7 +771,10 @@ KMSDRM_DestroySurfaces(_THIS, SDL_Window * window)
        the display plane from the GBM surface buffer it's reading by setting 
        it's CRTC_ID and FB_ID props to 0.
     */
-    drm_atomic_setbuffer(_this, dispdata->display_plane, 0, 0);
+    KMSDRM_PlaneInfo info = {0};
+    info.plane = dispdata->display_plane;
+
+    drm_atomic_set_plane_props(&info);
     drm_atomic_commit(_this, SDL_TRUE);
 
     if (windata->bo) {

src/video/kmsdrm/SDL_kmsdrmvideo.h

@@ -119,12 +119,29 @@ typedef struct KMSDRM_FBInfo
     uint32_t fb_id;     /* DRM framebuffer ID */
 } KMSDRM_FBInfo;
 
+/* Info passed to set_plane_props calls. */
+typedef struct KMSDRM_PlaneInfo
+{
+    struct plane *plane;
+    uint32_t fb_id;
+    uint32_t crtc_id;
+    int src_x;
+    int src_y;
+    int src_w;
+    int src_h;
+    int crtc_x;
+    int crtc_y;
+    int crtc_w;
+    int crtc_h;
+} KMSDRM_PlaneInfo;
+
 /* Helper functions */
 int KMSDRM_CreateSurfaces(_THIS, SDL_Window * window);
 KMSDRM_FBInfo *KMSDRM_FBFromBO(_THIS, struct gbm_bo *bo);
 
 /* Atomic functions that are used from SDL_kmsdrmopengles.c and SDL_kmsdrmmouse.c */
-void drm_atomic_setbuffer(_THIS, struct plane *plane, uint32_t fb_id, uint32_t crtc_id);
+int drm_atomic_set_plane_props(struct KMSDRM_PlaneInfo *info); 
+
 void drm_atomic_waitpending(_THIS);
 int drm_atomic_commit(_THIS, SDL_bool blocking);
 int add_plane_property(drmModeAtomicReq *req, struct plane *plane,