1 files changed, 341 insertions, 151 deletions

diff --git a/minuitwrp/graphics_overlay.c b/minuitwrp/graphics_overlay.cpp
index 723ffa2d4..5445b6f62 100644
--- a/minuitwrp/graphics_overlay.c
+++ b/minuitwrp/graphics_overlay.cpp
@@ -1,40 +1,29 @@
 /*
- * Copyright (c) 2013, The Linux Foundation. All rights reserved.
+ * Copyright (C) 2014 The Android Open Source Project
  *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *     * Redistributions of source code must retain the above copyright
- *       notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- *       copyright notice, this list of conditions and the following
- *       disclaimer in the documentation and/or other materials provided
- *       with the distribution.
- *     * Neither the name of The Linux Foundation nor the names of its
- *       contributors may be used to endorse or promote products derived
- *       from this software without specific prior written permission.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
- * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
- * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
- * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
- * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
- * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*/
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 
 #include <stdbool.h>
 #include <stdlib.h>
+#include <string.h>
 #include <unistd.h>
-
 #include <errno.h>
+
 #include <fcntl.h>
 #include <stdio.h>
 
+#include <sys/cdefs.h>
 #include <sys/ioctl.h>
 #include <sys/mman.h>
 #include <sys/types.h>
@@ -47,15 +36,32 @@
 #include <linux/msm_ion.h>
 #endif
 
-#include <pixelflinger/pixelflinger.h>
-
 #include "minui.h"
+#include "graphics.h"
+#include <pixelflinger/pixelflinger.h>
 
 #define MDP_V4_0 400
+#define MAX_DISPLAY_DIM  2048
 
-#ifdef MSM_BSP
+static GRSurface* overlay_init(minui_backend*);
+static GRSurface* overlay_flip(minui_backend*);
+static void overlay_blank(minui_backend*, bool);
+static void overlay_exit(minui_backend*);
+
+static GRSurface gr_framebuffer;
+static GRSurface* gr_draw = NULL;
+static int displayed_buffer;
+
+static fb_var_screeninfo vi;
+static int fb_fd = -1;
+static bool isMDP5 = false;
+static int leftSplit = 0;
+static int rightSplit = 0;
 #define ALIGN(x, align) (((x) + ((align)-1)) & ~((align)-1))
 
+static size_t frame_size = 0;
+
+#ifdef MSM_BSP
 typedef struct {
     unsigned char *mem_buf;
     int size;
@@ -72,23 +78,31 @@ static memInfo mem_info;
 
 static int map_mdp_pixel_format()
 {
-    int format = MDP_RGB_565;
-#if defined(RECOVERY_BGRA)
-    format = MDP_BGRA_8888;
-#elif defined(RECOVERY_RGBA)
-    format = MDP_RGBA_8888;
-#elif defined(RECOVERY_RGBX)
-    format = MDP_RGBA_8888;
-#endif
-    return format;
+    if (gr_framebuffer.format == GGL_PIXEL_FORMAT_RGB_565)
+        return MDP_RGB_565;
+    else if (gr_framebuffer.format == GGL_PIXEL_FORMAT_BGRA_8888)
+        return MDP_BGRA_8888;
+    else if (gr_framebuffer.format == GGL_PIXEL_FORMAT_RGBA_8888)
+        return MDP_RGBA_8888;
+    else if (gr_framebuffer.format == GGL_PIXEL_FORMAT_RGBX_8888)
+        return MDP_RGBA_8888;
+    printf("No known pixel format for map_mdp_pixel_format, defaulting to MDP_RGB_565.\n");
+    return MDP_RGB_565;
 }
+#endif // MSM_BSP
 
-static bool overlay_supported = false;
-static bool isMDP5 = false;
+static minui_backend my_backend = {
+    .init = overlay_init,
+    .flip = overlay_flip,
+    .blank = overlay_blank,
+    .exit = overlay_exit,
+};
 
 bool target_has_overlay(char *version)
 {
+    int ret;
     int mdp_version;
+    bool overlay_supported = false;
 
     if (strlen(version) >= 8) {
         if(!strncmp(version, "msmfb", strlen("msmfb"))) {
@@ -104,22 +118,100 @@ bool target_has_overlay(char *version)
             isMDP5 = true;
         }
     }
-    if (overlay_supported) printf("Using qcomm overlay\n");
+
     return overlay_supported;
 }
 
-bool isTargetMdp5()
+minui_backend* open_overlay() {
+    fb_fix_screeninfo fi;
+    int fd;
+
+    fd = open("/dev/graphics/fb0", O_RDWR);
+    if (fd < 0) {
+        perror("open_overlay cannot open fb0");
+        return NULL;
+    }
+
+    if (ioctl(fd, FBIOGET_FSCREENINFO, &fi) < 0) {
+        perror("failed to get fb0 info");
+        close(fd);
+        return NULL;
+    }
+
+    if (target_has_overlay(fi.id)) {
+#ifdef MSM_BSP
+        close(fd);
+        return &my_backend;
+#else
+        printf("Overlay graphics may work (%s), but not enabled. Use TW_TARGET_USES_QCOM_BSP := true to enable.\n", fi.id);
+#endif
+    }
+    close(fd);
+    return NULL;
+}
+
+static void overlay_blank(minui_backend* backend __unused, bool blank)
 {
-    if (isMDP5)
-        return true;
+#if defined(TW_NO_SCREEN_BLANK) && defined(TW_BRIGHTNESS_PATH) && defined(TW_MAX_BRIGHTNESS)
+    int fd;
+    char brightness[4];
+    snprintf(brightness, 4, "%03d", TW_MAX_BRIGHTNESS/2);
+
+    fd = open(TW_BRIGHTNESS_PATH, O_RDWR);
+    if (fd < 0) {
+        perror("cannot open LCD backlight");
+        return;
+    }
+    write(fd, blank ? "000" : brightness, 3);
+    close(fd);
+#else
+    int ret;
 
-    return false;
+    ret = ioctl(fb_fd, FBIOBLANK, blank ? FB_BLANK_POWERDOWN : FB_BLANK_UNBLANK);
+    if (ret < 0)
+        perror("ioctl(): blank");
+#endif
 }
 
-int free_ion_mem(void) {
-    if (!overlay_supported)
-        return -EINVAL;
+#ifdef MSM_BSP
+void setDisplaySplit(void) {
+    char split[64] = {0};
+    if (!isMDP5)
+        return;
+    FILE* fp = fopen("/sys/class/graphics/fb0/msm_fb_split", "r");
+    if (fp) {
+        //Format "left right" space as delimiter
+        if(fread(split, sizeof(char), 64, fp)) {
+            leftSplit = atoi(split);
+            printf("Left Split=%d\n",leftSplit);
+            char *rght = strpbrk(split, " ");
+            if (rght)
+                rightSplit = atoi(rght + 1);
+            printf("Right Split=%d\n", rightSplit);
+        }
+    } else {
+        printf("Failed to open mdss_fb_split node\n");
+    }
+    if (fp)
+        fclose(fp);
+}
+
+int getLeftSplit(void) {
+   //Default even split for all displays with high res
+   int lSplit = vi.xres / 2;
+
+   //Override if split published by driver
+   if (leftSplit)
+       lSplit = leftSplit;
+
+   return lSplit;
+}
 
+int getRightSplit(void) {
+   return rightSplit;
+}
+
+int free_ion_mem(void) {
     int ret = 0;
 
     if (mem_info.mem_buf)
@@ -144,8 +236,6 @@ int free_ion_mem(void) {
 
 int alloc_ion_mem(unsigned int size)
 {
-    if (!overlay_supported)
-        return -EINVAL;
     int result;
     struct ion_fd_data fd_data;
     struct ion_allocation_data ionAllocData;
@@ -195,13 +285,20 @@ int alloc_ion_mem(unsigned int size)
     return 0;
 }
 
-int allocate_overlay(int fd, GGLSurface gr_fb[])
+bool isDisplaySplit(void) {
+    if (vi.xres > MAX_DISPLAY_DIM)
+        return true;
+    //check if right split is set by driver
+    if (getRightSplit())
+        return true;
+
+    return false;
+}
+
+int allocate_overlay(int fd, GRSurface gr_fb)
 {
     int ret = 0;
 
-    if (!overlay_supported)
-        return -EINVAL;
-
     if (!isDisplaySplit()) {
         // Check if overlay is already allocated
         if (MSMFB_NEW_REQUEST == overlayL_id) {
@@ -210,13 +307,13 @@ int allocate_overlay(int fd, GGLSurface gr_fb[])
             memset(&overlayL, 0 , sizeof (struct mdp_overlay));
 
             /* Fill Overlay Data */
-            overlayL.src.width  = ALIGN(gr_fb[0].width, 32);
-            overlayL.src.height = gr_fb[0].height;
+            overlayL.src.width  = ALIGN(gr_fb.width, 32);
+            overlayL.src.height = gr_fb.height;
             overlayL.src.format = map_mdp_pixel_format();
-            overlayL.src_rect.w = gr_fb[0].width;
-            overlayL.src_rect.h = gr_fb[0].height;
-            overlayL.dst_rect.w = gr_fb[0].width;
-            overlayL.dst_rect.h = gr_fb[0].height;
+            overlayL.src_rect.w = gr_fb.width;
+            overlayL.src_rect.h = gr_fb.height;
+            overlayL.dst_rect.w = gr_fb.width;
+            overlayL.dst_rect.h = gr_fb.height;
             overlayL.alpha = 0xFF;
             overlayL.transp_mask = MDP_TRANSP_NOP;
             overlayL.id = MSMFB_NEW_REQUEST;
@@ -228,13 +325,13 @@ int allocate_overlay(int fd, GGLSurface gr_fb[])
             overlayL_id = overlayL.id;
         }
     } else {
-        float xres = getFbXres();
+        float xres = vi.xres;
         int lSplit = getLeftSplit();
         float lSplitRatio = lSplit / xres;
-        float lCropWidth = gr_fb[0].width * lSplitRatio;
+        float lCropWidth = gr_fb.width * lSplitRatio;
         int lWidth = lSplit;
-        int rWidth = gr_fb[0].width - lSplit;
-        int height = gr_fb[0].height;
+        int rWidth = gr_fb.width - lSplit;
+        int height = gr_fb.height;
 
         if (MSMFB_NEW_REQUEST == overlayL_id) {
 
@@ -243,13 +340,13 @@ int allocate_overlay(int fd, GGLSurface gr_fb[])
             memset(&overlayL, 0 , sizeof (struct mdp_overlay));
 
             /* Fill OverlayL Data */
-            overlayL.src.width  = ALIGN(gr_fb[0].width, 32);
-            overlayL.src.height = gr_fb[0].height;
+            overlayL.src.width  = ALIGN(gr_fb.width, 32);
+            overlayL.src.height = gr_fb.height;
             overlayL.src.format = map_mdp_pixel_format();
             overlayL.src_rect.x = 0;
             overlayL.src_rect.y = 0;
             overlayL.src_rect.w = lCropWidth;
-            overlayL.src_rect.h = gr_fb[0].height;
+            overlayL.src_rect.h = gr_fb.height;
             overlayL.dst_rect.x = 0;
             overlayL.dst_rect.y = 0;
             overlayL.dst_rect.w = lWidth;
@@ -270,13 +367,13 @@ int allocate_overlay(int fd, GGLSurface gr_fb[])
             memset(&overlayR, 0 , sizeof (struct mdp_overlay));
 
             /* Fill OverlayR Data */
-            overlayR.src.width  = ALIGN(gr_fb[0].width, 32);
-            overlayR.src.height = gr_fb[0].height;
+            overlayR.src.width  = ALIGN(gr_fb.width, 32);
+            overlayR.src.height = gr_fb.height;
             overlayR.src.format = map_mdp_pixel_format();
             overlayR.src_rect.x = lCropWidth;
             overlayR.src_rect.y = 0;
-            overlayR.src_rect.w = gr_fb[0].width - lCropWidth;
-            overlayR.src_rect.h = gr_fb[0].height;
+            overlayR.src_rect.w = gr_fb.width - lCropWidth;
+            overlayR.src_rect.h = gr_fb.height;
             overlayR.dst_rect.x = 0;
             overlayR.dst_rect.y = 0;
             overlayR.dst_rect.w = rWidth;
@@ -297,64 +394,8 @@ int allocate_overlay(int fd, GGLSurface gr_fb[])
     return 0;
 }
 
-int free_overlay(int fd)
-{
-    if (!overlay_supported)
-        return -EINVAL;
-
-    int ret = 0;
-    struct mdp_display_commit ext_commit;
-
-    if (!isDisplaySplit()) {
-        if (overlayL_id != MSMFB_NEW_REQUEST) {
-            ret = ioctl(fd, MSMFB_OVERLAY_UNSET, &overlayL_id);
-            if (ret) {
-                perror("Overlay Unset Failed");
-                overlayL_id = MSMFB_NEW_REQUEST;
-                return ret;
-            }
-        }
-    } else {
-
-        if (overlayL_id != MSMFB_NEW_REQUEST) {
-            ret = ioctl(fd, MSMFB_OVERLAY_UNSET, &overlayL_id);
-            if (ret) {
-                perror("OverlayL Unset Failed");
-                overlayL_id = MSMFB_NEW_REQUEST;
-                return ret;
-            }
-        }
-
-        if (overlayR_id != MSMFB_NEW_REQUEST) {
-            ret = ioctl(fd, MSMFB_OVERLAY_UNSET, &overlayR_id);
-            if (ret) {
-                perror("OverlayR Unset Failed");
-                overlayR_id = MSMFB_NEW_REQUEST;
-                return ret;
-            }
-        }
-    }
-    memset(&ext_commit, 0, sizeof(struct mdp_display_commit));
-    ext_commit.flags = MDP_DISPLAY_COMMIT_OVERLAY;
-    ext_commit.wait_for_finish = 1;
-    ret = ioctl(fd, MSMFB_DISPLAY_COMMIT, &ext_commit);
-    if (ret < 0) {
-        perror("ERROR: Clear MSMFB_DISPLAY_COMMIT failed!");
-        overlayL_id = MSMFB_NEW_REQUEST;
-        overlayR_id = MSMFB_NEW_REQUEST;
-        return ret;
-    }
-    overlayL_id = MSMFB_NEW_REQUEST;
-    overlayR_id = MSMFB_NEW_REQUEST;
-
-    return 0;
-}
-
-int overlay_display_frame(int fd, GGLubyte* data, size_t size)
+int overlay_display_frame(int fd, void* data, size_t size)
 {
-    if (!overlay_supported)
-        return -EINVAL;
-
     int ret = 0;
     struct msmfb_overlay_data ovdataL, ovdataR;
     struct mdp_display_commit ext_commit;
@@ -376,6 +417,7 @@ int overlay_display_frame(int fd, GGLubyte* data, size_t size)
         ret = ioctl(fd, MSMFB_OVERLAY_PLAY, &ovdataL);
         if (ret < 0) {
             perror("overlay_display_frame failed, overlay play Failed\n");
+            printf("%i, %i, %i, %i\n", ret, fb_fd, fd, errno);
             return ret;
         }
     } else {
@@ -426,38 +468,186 @@ int overlay_display_frame(int fd, GGLubyte* data, size_t size)
     return ret;
 }
 
-#else
-
-bool target_has_overlay(char *version) {
-    return false;
+static GRSurface* overlay_flip(minui_backend* backend __unused) {
+#if defined(RECOVERY_BGRA)
+    // In case of BGRA, do some byte swapping
+    unsigned int idx;
+    unsigned char tmp;
+    unsigned char* ucfb_vaddr = (unsigned char*)gr_draw->data;
+    for (idx = 0 ; idx < (gr_draw->height * gr_draw->row_bytes);
+            idx += 4) {
+        tmp = ucfb_vaddr[idx];
+        ucfb_vaddr[idx    ] = ucfb_vaddr[idx + 2];
+        ucfb_vaddr[idx + 2] = tmp;
+    }
+#endif
+    // Copy from the in-memory surface to the framebuffer.
+    overlay_display_frame(fb_fd, gr_draw->data, frame_size);
+    return gr_draw;
 }
 
-bool isTargetMdp5() {
-    return false;
-}
+int free_overlay(int fd)
+{
+    int ret = 0;
+    struct mdp_display_commit ext_commit;
 
-int free_ion_mem(void) {
-    return -EINVAL;
-}
+    if (!isDisplaySplit()) {
+        if (overlayL_id != MSMFB_NEW_REQUEST) {
+            ret = ioctl(fd, MSMFB_OVERLAY_UNSET, &overlayL_id);
+            if (ret) {
+                perror("Overlay Unset Failed");
+                overlayL_id = MSMFB_NEW_REQUEST;
+                return ret;
+            }
+        }
+    } else {
 
-int alloc_ion_mem(unsigned int size)
-{
-    return -EINVAL;
+        if (overlayL_id != MSMFB_NEW_REQUEST) {
+            ret = ioctl(fd, MSMFB_OVERLAY_UNSET, &overlayL_id);
+            if (ret) {
+                perror("OverlayL Unset Failed");
+            }
+        }
+
+        if (overlayR_id != MSMFB_NEW_REQUEST) {
+            ret = ioctl(fd, MSMFB_OVERLAY_UNSET, &overlayR_id);
+            if (ret) {
+                perror("OverlayR Unset Failed");
+                overlayR_id = MSMFB_NEW_REQUEST;
+                return ret;
+            }
+        }
+    }
+    memset(&ext_commit, 0, sizeof(struct mdp_display_commit));
+    ext_commit.flags = MDP_DISPLAY_COMMIT_OVERLAY;
+    ext_commit.wait_for_finish = 1;
+    ret = ioctl(fd, MSMFB_DISPLAY_COMMIT, &ext_commit);
+    if (ret < 0) {
+        perror("ERROR: Clear MSMFB_DISPLAY_COMMIT failed!");
+        overlayL_id = MSMFB_NEW_REQUEST;
+        overlayR_id = MSMFB_NEW_REQUEST;
+        return ret;
+    }
+    overlayL_id = MSMFB_NEW_REQUEST;
+    overlayR_id = MSMFB_NEW_REQUEST;
+
+    return 0;
 }
 
-int allocate_overlay(int fd, GGLSurface gr_fb[])
-{
-    return -EINVAL;
+static GRSurface* overlay_init(minui_backend* backend) {
+    int fd = open("/dev/graphics/fb0", O_RDWR);
+    if (fd == -1) {
+        perror("cannot open fb0");
+        return NULL;
+    }
+
+    fb_fix_screeninfo fi;
+    if (ioctl(fd, FBIOGET_FSCREENINFO, &fi) < 0) {
+        perror("failed to get fb0 info");
+        close(fd);
+        return NULL;
+    }
+
+    if (ioctl(fd, FBIOGET_VSCREENINFO, &vi) < 0) {
+        perror("failed to get fb0 info");
+        close(fd);
+        return NULL;
+    }
+
+    // We print this out for informational purposes only, but
+    // throughout we assume that the framebuffer device uses an RGBX
+    // pixel format.  This is the case for every development device I
+    // have access to.  For some of those devices (eg, hammerhead aka
+    // Nexus 5), FBIOGET_VSCREENINFO *reports* that it wants a
+    // different format (XBGR) but actually produces the correct
+    // results on the display when you write RGBX.
+    //
+    // If you have a device that actually *needs* another pixel format
+    // (ie, BGRX, or 565), patches welcome...
+
+    printf("fb0 reports (possibly inaccurate):\n"
+           "  vi.bits_per_pixel = %d\n"
+           "  vi.red.offset   = %3d   .length = %3d\n"
+           "  vi.green.offset = %3d   .length = %3d\n"
+           "  vi.blue.offset  = %3d   .length = %3d\n",
+           vi.bits_per_pixel,
+           vi.red.offset, vi.red.length,
+           vi.green.offset, vi.green.length,
+           vi.blue.offset, vi.blue.length);
+
+    gr_framebuffer.width = vi.xres;
+    gr_framebuffer.height = vi.yres;
+    gr_framebuffer.row_bytes = fi.line_length;
+    gr_framebuffer.pixel_bytes = vi.bits_per_pixel / 8;
+    //gr_framebuffer.data = reinterpret_cast<uint8_t*>(bits);
+    if (vi.bits_per_pixel == 16) {
+        printf("setting GGL_PIXEL_FORMAT_RGB_565\n");
+        gr_framebuffer.format = GGL_PIXEL_FORMAT_RGB_565;
+    } else if (vi.red.offset == 8) {
+        printf("setting GGL_PIXEL_FORMAT_BGRA_8888\n");
+        gr_framebuffer.format = GGL_PIXEL_FORMAT_BGRA_8888;
+    } else if (vi.red.offset == 0) {
+        printf("setting GGL_PIXEL_FORMAT_RGBA_8888\n");
+        gr_framebuffer.format = GGL_PIXEL_FORMAT_RGBA_8888;
+    } else if (vi.red.offset == 24) {
+        printf("setting GGL_PIXEL_FORMAT_RGBX_8888\n");
+        gr_framebuffer.format = GGL_PIXEL_FORMAT_RGBX_8888;
+    } else {
+        if (vi.red.length == 8) {
+            printf("No valid pixel format detected, trying GGL_PIXEL_FORMAT_RGBX_8888\n");
+            gr_framebuffer.format = GGL_PIXEL_FORMAT_RGBX_8888;
+        } else {
+            printf("No valid pixel format detected, trying GGL_PIXEL_FORMAT_RGB_565\n");
+            gr_framebuffer.format = GGL_PIXEL_FORMAT_RGB_565;
+        }
+    }
+
+    frame_size = fi.line_length * vi.yres;
+
+    gr_framebuffer.data = reinterpret_cast<uint8_t*>(calloc(frame_size, 1));
+    if (gr_framebuffer.data == NULL) {
+        perror("failed to calloc framebuffer");
+        close(fd);
+        return NULL;
+    }
+
+    gr_draw = &gr_framebuffer;
+    fb_fd = fd;
+
+    printf("framebuffer: %d (%d x %d)\n", fb_fd, gr_draw->width, gr_draw->height);
+
+    overlay_blank(backend, true);
+    overlay_blank(backend, false);
+
+    if (!alloc_ion_mem(frame_size))
+        allocate_overlay(fb_fd, gr_framebuffer);
+
+    return gr_draw;
 }
 
-int free_overlay(int fd)
-{
-    return -EINVAL;
+static void overlay_exit(minui_backend* backend __unused) {
+    free_overlay(fb_fd);
+    free_ion_mem();
+
+    close(fb_fd);
+    fb_fd = -1;
+
+    if (gr_draw) {
+        free(gr_draw->data);
+        free(gr_draw);
+    }
+    gr_draw = NULL;
+}
+#else // MSM_BSP
+static GRSurface* overlay_flip(minui_backend* backend __unused) {
+    return NULL;
 }
 
-int overlay_display_frame(int fd, GGLubyte* data, size_t size)
-{
-    return -EINVAL;
+static GRSurface* overlay_init(minui_backend* backend __unused) {
+    return NULL;
 }
 
-#endif //#ifdef MSM_BSP
+static void overlay_exit(minui_backend* backend __unused) {
+    return;
+}
+#endif // MSM_BSP