power: Turn on/off display

PowerHAL writes to a sysfs node when it gets display on/off
notification.

Change-Id: I8c3437908f992aec23336ea104c6ac091a961205

1 files changed, 44 insertions, 1 deletions

diff --git a/power-8953.c b/power-8953.c
index 09df941..805fb8d 100644
--- a/power-8953.c
+++ b/power-8953.c
@@ -58,6 +58,9 @@ static int camera_hint_ref_count;
 static void process_video_encode_hint(void *metadata);
 //static void process_cam_preview_hint(void *metadata);
 
+static int display_fd;
+#define SYS_DISPLAY_PWR "/sys/kernel/hbtp/display_pwr"
+
 int  power_hint_override(struct power_module *module, power_hint_t hint,
         void *data)
 {
@@ -79,7 +82,13 @@ int  set_interactive_override(struct power_module *module, int on)
     char governor[80];
     char tmp_str[NODE_MAX];
     struct video_encode_metadata_t video_encode_metadata;
-    int rc;
+    int rc = 0;
+
+    static const char *display_on = "1";
+    static const char *display_off = "0";
+    char err_buf[80];
+    static int init_interactive_hint = 0;
+    static int set_i_count = 0;
 
     ALOGI("Got set_interactive hint");
 
@@ -118,6 +127,40 @@ int  set_interactive_override(struct power_module *module, int on)
           }
    }
     saved_interactive_mode = !!on;
+
+    set_i_count ++;
+    ALOGI("Got set_interactive hint on= %d, count= %d\n", on, set_i_count);
+
+    if (init_interactive_hint == 0)
+    {
+        //First time the display is turned off
+        display_fd = TEMP_FAILURE_RETRY(open(SYS_DISPLAY_PWR, O_RDWR));
+        if (display_fd < 0) {
+            strerror_r(errno,err_buf,sizeof(err_buf));
+            ALOGE("Error opening %s: %s\n", SYS_DISPLAY_PWR, err_buf);
+            return HINT_HANDLED;
+        }
+        else
+            init_interactive_hint = 1;
+    }
+    else
+        if (!on ) {
+            /* Display off. */
+            rc = TEMP_FAILURE_RETRY(write(display_fd, display_off, strlen(display_off)));
+            if (rc < 0) {
+                strerror_r(errno,err_buf,sizeof(err_buf));
+                ALOGE("Error writing %s to  %s: %s\n", display_off, SYS_DISPLAY_PWR, err_buf);
+            }
+        }
+        else {
+            /* Display on */
+            rc = TEMP_FAILURE_RETRY(write(display_fd, display_on, strlen(display_on)));
+            if (rc < 0) {
+                strerror_r(errno,err_buf,sizeof(err_buf));
+                ALOGE("Error writing %s to  %s: %s\n", display_on, SYS_DISPLAY_PWR, err_buf);
+            }
+        }
+
     return HINT_HANDLED;
 }