livedisplay: Support sysfs only display modesstaging/lineage-15.1lineage-15.1

*) If SDM does not provide any display modes and yet
   sysfs options are available, allow them to be
   used and create a "standard" mode that is all
   sysfs based modes turned off.

*) Known deficiency: the sysfs modes are still not
   accessible if SDM is not available.  This will
   be addressed later (possibly by moving sysfs mode
   handling to lineagehw).

Change-Id: If80134362db0d359aaacb6b1916dc99e41af1892

1 files changed, 4 insertions, 0 deletions

diff --git a/impl/SDM.h b/impl/SDM.h
index f0d3ebe..f6db039 100644
--- a/impl/SDM.h
+++ b/impl/SDM.h
@@ -13,6 +13,9 @@
 #define FOSS_OFF "foss:off"
 #define FOSS_STATUS "foss:status"
 
+// For use when only sysfs modes are available
+#define STANDARD_NODE_ID 600
+
 #define SRGB_NODE "/sys/class/graphics/fb0/srgb"
 #define SRGB_NODE_ID 601
 
@@ -99,6 +102,7 @@ class SDM : public LiveDisplayBackend {
     status_t setModeState(sp<DisplayMode> mode, bool state);
     status_t saveInitialDisplayMode();
     uint32_t getNumDisplayModes();
+    uint32_t getNumSDMDisplayModes();
 
     int64_t mHandle;
     bool mCachedFOSSStatus;