From 431dc083a9569625413fc7cea13d299772fd29e5 Mon Sep 17 00:00:00 2001
From: Steve Kondik <shade@chemlab.org>
Date: Tue, 2 Oct 2012 05:16:27 -0700
Subject: [PATCH] Revert "hwc: Support VSYNC notification via sysfs"

This reverts commit 0d47bc4df5de25b8232a3c297a96d8def5e206af.

I suppose we'll use CAF's version.
---
 libhwcomposer/hwc_uevents.cpp | 38 -----------------------------------
 1 file changed, 38 deletions(-)

diff --git a/libhwcomposer/hwc_uevents.cpp b/libhwcomposer/hwc_uevents.cpp
index 931b8d6..dc94eac 100644
--- a/libhwcomposer/hwc_uevents.cpp
+++ b/libhwcomposer/hwc_uevents.cpp
@@ -26,7 +26,6 @@
 #include <sys/prctl.h>
 #include <string.h>
 #include <stdlib.h>
-#include <fcntl.h>
 #include "hwc_utils.h"
 #include "hwc_external.h"
 
@@ -103,48 +102,11 @@ static void *uevent_loop(void *param)
     return NULL;
 }
 
-static void *vsync_loop(void *param)
-{
-    static char buf[4096];
-    int fb0_vsync_fd;
-    fd_set exceptfds;
-    int res;
-    int64_t timestamp = 0;
-    hwc_context_t * ctx = reinterpret_cast<hwc_context_t *>(param);
-    hwc_procs* proc = (hwc_procs*)ctx->device.reserved_proc[0];
-
-    fb0_vsync_fd = open("/sys/devices/virtual/graphics/fb0/vsync_time", O_RDONLY);
-    if (!fb0_vsync_fd)
-        return NULL;
-
-    char thread_name[64] = "hwcVsyncThread";
-    prctl(PR_SET_NAME, (unsigned long) &thread_name, 0, 0, 0);
-    setpriority(PRIO_PROCESS, 0, -20);
-    memset(buf, 0, sizeof(buf));
-
-    ALOGI("Using sysfs mechanism for VSYNC notification");
-
-    FD_ZERO(&exceptfds);
-    FD_SET(fb0_vsync_fd, &exceptfds);
-
-    do {
-        ssize_t len = read(fb0_vsync_fd, buf, sizeof(buf));
-        timestamp = strtoull(buf, NULL, 0);
-        proc->vsync(proc, 0, timestamp);
-        select(fb0_vsync_fd + 1, NULL, NULL, &exceptfds, NULL);
-        lseek(fb0_vsync_fd, 0, SEEK_SET);
-    } while (1);
-
-    return NULL;
-}
-
 void init_uevent_thread(hwc_context_t* ctx)
 {
     pthread_t uevent_thread;
-    pthread_t vsync_thread;
     ALOGI("Initializing UEvent Listener Thread");
     pthread_create(&uevent_thread, NULL, uevent_loop, (void*) ctx);
-    pthread_create(&vsync_thread, NULL, vsync_loop, (void*) ctx);
 }
 
 }; //namespace