hwc: Add support for panel resolution switch
Add support for panel resolution switch. This feature makes use of
the Linux modedb feature that lists available modes in
/sys/class/graphics/fb0/modes and accepts a mode change when written
to /sys/class/graphics/fb0/mode
Clients can link to APIs exposed in display_config.h, these
internally resolve to binder calls into HWC. For debugging, mode
changes can be made over binder using shell commands.
adb shell service call display.qservice CODE ARGS
ARGS can include config index and display (only primary supported)
setActiveConfig():
adb shell service call display.qservice 25 i32 INDEX i32 0
getActiveConfig():
adb shell service call display.qservice 26 i32 0
getConfigCount():
adb shell service call display.qservice 27 i32 0
getDisplayAttributes():
adb shell service call display.qservice 28 i32 INDEX i32 0
Change-Id: I97d34cc9c0e521a3bd5c948eeea6d1e07db7b7ff
diff --git a/libqdutils/display_config.h b/libqdutils/display_config.h
index 8bafe91..6a66e9f 100644
--- a/libqdutils/display_config.h
+++ b/libqdutils/display_config.h
@@ -31,11 +31,8 @@
#include <mdp_version.h>
#include <hardware/hwcomposer.h>
-// This header is for clients to use to set/get global display configuration
-// The functions in this header run in the client process and wherever necessary
-// do a binder call to HWC to get/set data.
+// This header is for clients to use to set/get global display configuration.
// Only primary and external displays are supported here.
-// WiFi/virtual displays are not supported.
namespace qdutils {
@@ -69,14 +66,20 @@
// Display Attributes that are available to clients of this library
// Not to be confused with a similar struct in hwc_utils (in the hwc namespace)
-struct DisplayAttributes_t {
+typedef struct DisplayAttributes {
uint32_t vsync_period; //nanoseconds
uint32_t xres;
uint32_t yres;
float xdpi;
float ydpi;
char panel_type;
-};
+ DisplayAttributes() : vsync_period(0), xres(0), yres(0), xdpi(0.0f),
+ ydpi(0.0f), panel_type(0) {}
+} DisplayAttributes_t;
+
+//=============================================================================
+// The functions below run in the client process and wherever necessary
+// do a binder call to HWC to get/set data.
// Check if external display is connected. Useful to check before making
// calls for external displays
@@ -104,4 +107,66 @@
// Enable/Disable/Set refresh rate dynamically
int configureDynRefreshRate(uint32_t op, uint32_t refreshRate);
+
+// Returns the number of configs supported for the display on success.
+// Returns -1 on error.
+// Only primary display supported for now, value of dpy ignored.
+int getConfigCount(int dpy);
+
+// Returns the index of config that is current set for the display on success.
+// Returns -1 on error.
+// Only primary display supported for now, value of dpy ignored.
+int getActiveConfig(int dpy);
+
+// Sets the config for the display on success and returns 0.
+// Returns -1 on error.
+// Only primary display supported for now, value of dpy ignored
+int setActiveConfig(int configIndex, int dpy);
+
+// Returns the attributes for the specified config for the display on success.
+// Returns xres and yres as 0 on error.
+// Only primary display supported for now, value of dpy ignored
+DisplayAttributes getDisplayAttributes(int configIndex, int dpy);
+
+//=============================================================================
+// The functions and methods below run in the context of HWC and
+// are called in response to binder calls from clients
+
+class Configs {
+public:
+ DisplayAttributes getAttributes(const uint32_t& index) const;
+ uint32_t getActiveConfig() const;
+ bool setActiveConfig(const uint32_t& index);
+ uint32_t getConfigCount() const;
+ static Configs *getInstance();
+private:
+ enum { CONFIGS_MAX = 32 };
+ Configs();
+ bool init();
+ bool getCurrentMode(DisplayAttributes& dpyAttr);
+ DisplayAttributes mConfigs[CONFIGS_MAX];
+ char *mModeStr[CONFIGS_MAX];
+ uint32_t mActiveConfig;
+ uint32_t mConfigsSupported;
+ static Configs *sConfigs;
+};
+
+inline DisplayAttributes Configs::getAttributes(const uint32_t& index) const {
+ if(index >= mConfigsSupported) {
+ ALOGE("%s() Invalid index %d, max %d", __FUNCTION__, index,
+ mConfigsSupported);
+ return DisplayAttributes(); //All 0s
+ }
+ return mConfigs[index];
+}
+
+// Retuns the current config index, -1 if called without a setActiveConfig
+inline uint32_t Configs::getActiveConfig() const {
+ return mActiveConfig;
+}
+
+inline uint32_t Configs::getConfigCount() const {
+ return mConfigsSupported;
+}
+
}; //namespace