Hi all, I am porting android jelly bean to a new device. I am have ported android kernel stuffs into my search by using the patches from android kernel from their source code.
I have also added the device(ery basic stuffs not wifi etc) files. Now I am supposed to add display to my device. I am not concerned about harware acceleration in the initial steps. I just want the display. So I am supposed to add android display HAL. I am confused with three things. 1) HWcomposer HAL. 2) Gralloc. 3) Framebuffer. The confusion that I am running through is that, I just want the basic display to work. What I am supposed to do for this. Do I need to write HWcomposer, gralloc and framebuffer. If I am supposed to do this can anybody point me to some documents regarding the same. Also will the display be up if I implement only gralloc and Framebuffer. On Tuesday, November 26, 2013 6:15:54 PM UTC+5:30, Vishveshwar wrote: > > On Monday, November 25, 2013 1:34:57 PM UTC+5:30, David wrote: >> >> Hi, Vishveshwar, >> >> I have successfully used your example to make my device boot into >> launcher. >> >> Great! > > >> However, your gralloc and framebuffer code seems not work with our >> driver implementation. >> I get black screen and review our driver code now. >> > > The gralloc code is same as gralloc.default in AOSP hardware/libhardware > except the hack to avoid lcd tearing using the > fbio_pandisplay/waitforvsync ioctls. > > Do update this thread whenever you find the solution for your issue. > > -Vishveshwar > >> Still thanks for your advice. Very helpful! >> >> Vishveshwar於 2013年11月22日星期五UTC+8下午2時44分14秒寫道： >>> >>> On Tuesday, November 19, 2013 12:37:01 PM UTC+5:30, David wrote: >>>> >>>> Thanks. >>>> >>>> I try to apply emulator setting. It seems the library works only in >>>> QEMU. >>>> >>>> I repeatedly got the following messages >>>> >>>> E/EGL_emulation( 1753): Failed to establish connection with the host >>>> E/ ( 1753): Failed to connect to host (QemuPipeStream)!!! >>>> >>>> Then SurfaceFlinger crash. >>>> >>>> I just wonder what egl.cfg and software stack I should include in my >>>> build. >>>> >>> >>> Can you list the changes that you did? >>> Also list the contents of /system/lib/egl and the contents of egl.cfg. >>> >>> I have the BeagleBone display working in Android by just adding the >>> additional system properties I linked to above. >>> >>> You could clone my device configuration for Beaglebone and try with the >>> resulting image. There is nothing device-specific in it. >>> >>> https://gitorious.org/rowboat/vishveshwars-beaglebone/commits/54efabfb87d4f8526a6c0afe9b220f213210f536<https://www.google.com/url?q=https%3A%2F%2Fgitorious.org%2Frowboat%2Fvishveshwars-beaglebone%2Fcommits%2F54efabfb87d4f8526a6c0afe9b220f213210f536&sa=D&sntz=1&usg=AFQjCNEorezRE3y7KlCV8fMSKySl43yj3Q> >>> >>> -Vishveshwar >>> >>>> >>>> Vishveshwar於 2013年11月15日星期五UTC+8下午3時00分50秒寫道： >>>>> >>>>> On Thursday, November 14, 2013 11:37:33 AM UTC+5:30, David wrote: >>>>>> >>>>>> Hi, all, >>>>>> >>>>>> I am porting katkit to our new hardware. >>>>>> >>>>>> Because the graphic driver is not yet ready, I want to use >>>>>> framebuffer + software openGL to boot the device. >>>>>> >>>>>> What should I do? I check the HWComposer.cpp, but seems its mFbDev >>>>>> never filled. >>>>>> >>>>>> Does anyone has experience to make this work? >>>>>> >>>>>> Not sure about hwc, but if you do not yet have the opengl drivers, >>>>> you need to force qemu emulation mode to get software opengl driver to >>>>> work. >>>>> >>>>> You can refer to my patch for the Beaglebone device here and do >>>>> something similar: >>>>> >>>>> https://gitorious.org/rowboat/vishveshwars-beaglebone/commit/158fef703ed888923ffbc8d0bac286b1025b5874<https://www.google.com/url?q=https%3A%2F%2Fgitorious.org%2Frowboat%2Fvishveshwars-beaglebone%2Fcommit%2F158fef703ed888923ffbc8d0bac286b1025b5874&sa=D&sntz=1&usg=AFQjCNGIC-_voD6EMhMph0T1aikzY8PgmA> >>>>> >>>>> -Vishveshwar >>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> -- -- unsubscribe: android-porting+unsubscr...@googlegroups.com website: http://groups.google.com/group/android-porting --- You received this message because you are subscribed to the Google Groups "android-porting" group. To unsubscribe from this group and stop receiving emails from it, send an email to android-porting+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
