[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 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. Maybe it is
somehow not compatible/not found/whatever, or the libsrv_um.so.1
library is not linked against that, so the application has to.

Regards,
Andreas
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