libhwcomposer: keep window 2 open

Window 2 is used to query global info about the LCD.

Kanged from patch for aries by Greg Hackmann <ghackmann@google.com>

Change-Id: Idf754d4536337d6c06652c1d0c744dc7c0936b15

exynos4/hal/libhwcomposer/SecHWC.cpp

@@ -927,7 +927,7 @@ static int hwc_eventControl(struct hwc_composer_device_1* dev, int dpy,
     switch (event) {
     case HWC_EVENT_VSYNC:
         int val = !!enabled;
-        int err = ioctl(ctx->win[0].fd, S3CFB_SET_VSYNC_INT, &val);
+        int err = ioctl(ctx->global_lcd_win.fd, S3CFB_SET_VSYNC_INT, &val);
         if (err < 0)
             return -errno;
         
@@ -1022,6 +1022,11 @@ static int hwc_device_close(struct hw_device_t *dev)
             ret = -1;
         }
 
+        if (window_close(&ctx->global_lcd_win) < 0) {
+            SEC_HWC_Log(HWC_LOG_ERROR, "%s::window_close() fail", __func__);
+            ret = -1;
+        }
+
         for (i = 0; i < NUM_OF_WIN; i++) {
             if (window_close(&ctx->win[i]) < 0)
                 SEC_HWC_Log(HWC_LOG_DEBUG, "%s::window_close() fail", __func__);
@@ -1079,7 +1084,14 @@ static int hwc_device_open(const struct hw_module_t* module, const char* name,
         }
     }
 
-    if (window_get_global_lcd_info(dev->win[0].fd, &dev->lcd_info) < 0) {
+    /* open window 2, used to query global LCD info */
+    if (window_open(&dev->global_lcd_win, 2) < 0) {
+        SEC_HWC_Log(HWC_LOG_ERROR, "%s:: Failed to open window 2 device ", __func__);
+        status = -EINVAL;
+        goto err;
+    }
+
+    if (window_get_global_lcd_info(dev) < 0) {
         SEC_HWC_Log(HWC_LOG_ERROR,
                 "%s::window_get_global_lcd_info is failed : %s",
                 __func__, strerror(errno));
@@ -1152,6 +1164,9 @@ err:
     if (destroyFimc(&dev->fimc) < 0)
         SEC_HWC_Log(HWC_LOG_ERROR, "%s::destroyFimc() fail", __func__);
 
+    if (window_close(&dev->global_lcd_win) < 0)
+        SEC_HWC_Log(HWC_LOG_ERROR, "%s::window_close() fail", __func__);
+
     for (int i = 0; i < NUM_OF_WIN; i++) {
         if (window_close(&dev->win[i]) < 0)
             SEC_HWC_Log(HWC_LOG_DEBUG, "%s::window_close() fail", __func__);

exynos4/hal/libhwcomposer/SecHWCUtils.cpp

@@ -105,6 +105,15 @@ int window_open(struct hwc_win_info_t *win, int id)
     case 1:
         real_id = 4;
         break;
+    case 2:
+        real_id = 0;
+        break;
+    case 3:
+        real_id = 1;
+        break;
+    case 4:
+        real_id = 2;
+        break;
     default:
         SEC_HWC_Log(HWC_LOG_ERROR, "%s::id(%d) is weird", __func__, id);
         goto error;
@@ -272,16 +281,26 @@ int window_hide(struct hwc_win_info_t *win)
     return 0;
 }
 
-int window_get_global_lcd_info(int fd, struct fb_var_screeninfo *lcd_info)
+int window_get_global_lcd_info(struct hwc_context_t *ctx)
 {
-    if (ioctl(fd, FBIOGET_VSCREENINFO, lcd_info) < 0) {
+    if (ioctl(ctx->global_lcd_win.fd, FBIOGET_VSCREENINFO, &ctx->lcd_info) < 0) {
         SEC_HWC_Log(HWC_LOG_ERROR, "FBIOGET_VSCREENINFO failed : %s",
                 strerror(errno));
         return -1;
     }
 
-    SEC_HWC_Log(HWC_LOG_DEBUG, "%s:: Default LCD x(%d),y(%d)",
-            __func__, lcd_info->xres, lcd_info->yres);
+    if (ctx->lcd_info.xres == 0) {
+        SEC_HWC_Log(HWC_LOG_ERROR, "ATTENTION: XRES IS 0");
+    }
+
+    if (ctx->lcd_info.yres == 0) {
+        SEC_HWC_Log(HWC_LOG_ERROR, "ATTENTION: YRES IS 0");
+    }
+
+    if (ctx->lcd_info.bits_per_pixel == 0) {
+        SEC_HWC_Log(HWC_LOG_ERROR, "ATTENTION: BPP IS 0");
+    }
+
     return 0;
 }
 

exynos4/hal/libhwcomposer/SecHWCUtils.h

@@ -78,6 +78,7 @@
 #ifdef SAMSUNG_EXYNOS4210
 #define PP_DEVICE_DEV_NAME  "/dev/video1"
 #endif
+
 /* cacheable configuration */
 #define V4L2_CID_CACHEABLE			(V4L2_CID_BASE+40)
 
@@ -156,6 +157,7 @@ struct hwc_context_t {
 
     /* our private state goes below here */
     struct hwc_win_info_t     win[NUM_OF_WIN];
+    struct hwc_win_info_t     global_lcd_win;
 #ifdef SKIP_DUMMY_UI_LAY_DRAWING
     struct hwc_ui_lay_info    win_virt[NUM_OF_DUMMY_WIN];
     int                       fb_lay_skip_initialized;
@@ -278,7 +280,7 @@ int window_get_info   (struct hwc_win_info_t *win, int win_num);
 int window_pan_display(struct hwc_win_info_t *win);
 int window_show       (struct hwc_win_info_t *win);
 int window_hide       (struct hwc_win_info_t *win);
-int window_get_global_lcd_info(int fd, struct fb_var_screeninfo *lcd_info);
+int window_get_global_lcd_info(struct hwc_context_t *ctx);
 
 int createFimc (s5p_fimc_t *fimc);
 int destroyFimc(s5p_fimc_t *fimc);