On Thursday, January 2, 2014 11:27:39 AM UTC+5:30, [email protected] wrote: > > 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. > > Which android version are you using? For Android 4.4, the the approach I posted earlier in this thread should work.
-Vishveshwar > 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: [email protected] 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 [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
