disp: msm: sde: compute timeouts based on refresh rate

Current timeout values in sde driver for vblank, kickoff and
frame complete timeouts are fixed and can be much lower than
a vsync incase of low refresh rate display. Compute timeouts
based on refresh rate for low refresh rate displays.

Change-Id: I9dda41feb15446de7451824e185321de421ad575
Signed-off-by: Prabhanjan Kandula <pkandula@codeaurora.org>

msm/sde/sde_encoder.h

@@ -51,6 +51,9 @@
 #define IDLE_POWERCOLLAPSE_DURATION	(66 - 16/2)
 #define IDLE_POWERCOLLAPSE_IN_EARLY_WAKEUP (200 - 16/2)
 
+/* below this fps limit, timeouts are adjusted based on fps */
+#define DEFAULT_TIMEOUT_FPS_THRESHOLD            24
+
 /**
  * Encoder functions and data types
  * @intfs:	Interfaces this encoder is using, INTF_MODE_NONE if unused