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| author | Bernhard Rosenkraenzer <Bernhard.Rosenkranzer@linaro.org> | 2014-02-25 13:50:34 +0530 |
|---|---|---|
| committer | Amit Pundir <amit.pundir@linaro.org> | 2014-06-02 17:41:36 +0530 |
| commit | 5641642a207fdd21175d2134316c4da34db3e9e9 (patch) | |
| tree | eb93a7f64794954843b94e266098c984ed9d5532 /modules/gralloc | |
| parent | 5e3ac6bc7138e92fa04d7425a2a2535b9ae0e44a (diff) | |
| download | hardware_libhardware-5641642a207fdd21175d2134316c4da34db3e9e9.zip hardware_libhardware-5641642a207fdd21175d2134316c4da34db3e9e9.tar.gz hardware_libhardware-5641642a207fdd21175d2134316c4da34db3e9e9.tar.bz2 | |
gralloc: let target configure page flipping ioctl
Let vendor choose which framebuffer ioctl (FBIOPUT_VSCREENINFO or
FBIOPAN_DISPLAY) is best suited to do page-flip on its target platform.
Neither API is well documented about their usage and most of the
time it really depends on the respective framebuffer driver implementation.
* Default ioctl to do page-flip is FBIOPUT_VSCREENINFO.
* Set "TARGET_USE_PAN_DISPLAY=true" in board config file to use FBIOPAN_DISPLAY.
Change-Id: Ic3a50bd0f5fe37ac0149e11649c4abdadea85529
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
Diffstat (limited to 'modules/gralloc')
| -rw-r--r-- | modules/gralloc/Android.mk | 3 | ||||
| -rw-r--r-- | modules/gralloc/framebuffer.cpp | 14 |
2 files changed, 16 insertions, 1 deletions
diff --git a/modules/gralloc/Android.mk b/modules/gralloc/Android.mk index a4ffd20..092e851 100644 --- a/modules/gralloc/Android.mk +++ b/modules/gralloc/Android.mk @@ -29,5 +29,8 @@ LOCAL_SRC_FILES := \ LOCAL_MODULE := gralloc.default LOCAL_CFLAGS:= -DLOG_TAG=\"gralloc\" -Wno-missing-field-initializers +ifeq ($(TARGET_USE_PAN_DISPLAY),true) +LOCAL_CFLAGS += -DUSE_PAN_DISPLAY=1 +endif include $(BUILD_SHARED_LIBRARY) diff --git a/modules/gralloc/framebuffer.cpp b/modules/gralloc/framebuffer.cpp index 9d8513a..486e27a 100644 --- a/modules/gralloc/framebuffer.cpp +++ b/modules/gralloc/framebuffer.cpp @@ -42,6 +42,13 @@ /*****************************************************************************/ +// Set TARGET_USE_PAN_DISPLAY to true at compile time if the +// board uses FBIOPAN_DISPLAY to setup page flipping, otherwise +// default ioctl to do page-flipping is FBIOPUT_VSCREENINFO. +#ifndef USE_PAN_DISPLAY +#define USE_PAN_DISPLAY 0 +#endif + // numbers of buffers for page flipping #define NUM_BUFFERS 2 @@ -178,10 +185,15 @@ int mapFrameBufferLocked(struct private_module_t* module) uint32_t flags = PAGE_FLIP; +#if USE_PAN_DISPLAY + if (ioctl(fd, FBIOPAN_DISPLAY, &info) == -1) { + ALOGW("FBIOPAN_DISPLAY failed, page flipping not supported"); +#else if (ioctl(fd, FBIOPUT_VSCREENINFO, &info) == -1) { + ALOGW("FBIOPUT_VSCREENINFO failed, page flipping not supported"); +#endif info.yres_virtual = info.yres; flags &= ~PAGE_FLIP; - ALOGW("FBIOPUT_VSCREENINFO failed, page flipping not supported"); } if (info.yres_virtual < info.yres * 2) { |