[Letux-kernel] Lay common foundation to make PVR/SGX work without hacks on OMAP34xx, OMAP36xx, AM335x and potentially OMAP4, OMAP5

[Andreas Kemnade]

On Sat, 9 Mar 2019 22:15:28 +0100
"H. Nikolaus Schaller" <hns at goldelico.com> wrote:

> > Am 09.03.2019 um 22:08 schrieb Andreas Kemnade <andreas at kemnade.info>:
> > 
> > On Sat, 9 Mar 2019 21:48:28 +0100
> > H. Nikolaus Schaller <hns at goldelico.com> wrote:
> >   
> >> Hi Phillipp and all,
> >>   
> >>> Am 25.02.2019 um 21:42 schrieb Philipp Rossak <embed3d at gmail.com>:
> >>> 
> >>> 
> >>> 
> >>> On 25.02.19 14:12, H. Nikolaus Schaller wrote:    
> >>>> Now it compiles for all the omap variants (omap3,4,5). Sunxi is missing some asm header file and
> >>>> jz4780 is missing some uaccess_kernel() function in an asm header. Should not be too difficult to
> >>>> find replacements or API changes. Compile for Intel is not tested.    
> >>> 
> >>> I will have a look on the sunxi issue in the next days.    
> >> 
> >> do you already have done some test and got findings/patches/suggestions? Or something where I could help?
> >> 
> >> 
> >> I have some progress to get the DDK1.14 on v5.0 running on omap3/4/5.
> >> 
> >> The main issue so far was that I did not have matching "compatible" entries in the device tree so
> >> that probing the module did not succeed. And I had to port the CONFIG_RESET_CONTROLLER
> >> setup for omap.
> >> 
> >> But then it started working.
> >> 
> >> 
> >> Here on omap5:
> >> 
> >> 	root at letux:~# ./gpu-demo
> >> 	autodetected driver package: omap5-sgx544-116
> >> 	compatible driver: omap_omap5_sgx544_116
> >> 	module name: pvr_omap_omap5_sgx544_116
> >> 	pvrsrvctl: symbol lookup error: /usr/local/omap5-pvrsgx/lib/libsrv_um.so.1: undefined symbol: drmOpenRender
> >> 	System Version String: None
> >> 	Running gles1test1
> >> 	gles1test1: symbol lookup error: /usr/local/omap5-pvrsgx/lib/libsrv_um.so.1: undefined symbol: drmOpenRender
> >> 	Running gles2test1
> >> 	--------------------- started ---------------------
> >> 	gles2test1: symbol lookup error: /usr/local/omap5-pvrsgx/lib/libsrv_um.so.1: undefined symbol: drmOpenRender
> >> 	Running eglinfo
> >> 	eglinfo: symbol lookup error: /usr/local/omap5-pvrsgx/lib/libsrv_um.so.1: undefined symbol: drmOpenRender
> >> 	root at letux:~# 
> >> 
> >> And on omap3:
> >> 
> >> 	root at letux:~# ./gpu-demo
> >> 	autodetected driver package: omap3630-sgx530-125
> >> 	compatible driver: omap_omap3630_sgx530_125
> >> 	module name: pvr_omap_omap3630_sgx530_125
> >> 	pvrsrvctl: symbol lookup error: /usr/local/omap3-pvrsgx/lib/libsrv_um.so.1: undefined symbol: drmOpenRender
> >> 	System Version String: None
> >> 	Running sgx_clipblit_test
> >> 	----------------- SGX CLipBlit test -----------------
> >> 	---------------------- Start ------------------------
> >> 	Call PVRSRVConnect with a valid argument:
> >> 	sgx_clipblit_test: symbol lookup error: /usr/local/omap3-pvrsgx/lib/libsrv_um.so: undefined symbol: drmOpenRender
> >> 	Running gles1test1
> >> 	gles1test1: symbol lookup error: /usr/local/omap3-pvrsgx/lib/libsrv_um.so.1: undefined symbol: drmOpenRender
> >> 	Running gles2test1
> >> 	--------------------- started ---------------------
> >> 	gles2test1: symbol lookup error: /usr/local/omap3-pvrsgx/lib/libsrv_um.so.1: undefined symbol: drmOpenRender
> >> 	Running eglinfo
> >> 	eglinfo: symbol lookup error: /usr/local/omap3-pvrsgx/lib/libsrv_um.so.1: undefined symbol: drmOpenRender
> >> 	root at letux:~# 
> >> 
> >> 
> >> I am not sure where the user-space library problems come from. I think I have the correct DDK1.14 user space for
> >> omap from
> >> 
> >> 	git://git.ti.com/graphics/omap5-sgx-ddk-um-linux.git
> >> 
> >> but you never know:
> >> 
> >> 	http://e2e.ti.com/support/legacy_forums/embedded/linux/f/354/p/567306/2081687
> >> 
> >> But maybe it is simply because the -D flags of my in-kernel Makefile are not yet exactly correct.
> >>   
> > Hmm, usually this symbol comes from the standard libdrm.so.  
> 
> Yes, that is what I also was thinking. For some reason the libdrm.so
> on my Debian Jessie has all symbols stripped:
> 
nm -D displays more.

> root at letux:~# nm /usr/lib/arm-linux-gnueabihf/libdrm.so
> nm: /usr/lib/arm-linux-gnueabihf/libdrm.so: no symbols
> root at letux:~# nm /usr/lib/arm-linux-gnueabihf/libdrm.so.2
> nm: /usr/lib/arm-linux-gnueabihf/libdrm.so.2: no symbols
> root at letux:~# nm /usr/lib/arm-linux-gnueabihf/libdrm_omap.so
> nm: /usr/lib/arm-linux-gnueabihf/libdrm_omap.so: no symbols
> root at letux:~# 
> 

Regards,
Andreas
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