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

Sat Mar 9 22:15:28 CET 2019

> 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:

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:~# 

And the package libdrm-dbg does not provide a version with
symbols.

> 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.

Ok, the application shows:

root at letux:~# ldd /usr/local/omap3-pvrsgx/bin/gles1test1
        libdrm.so.2 => /usr/lib/arm-linux-gnueabihf/libdrm.so.2 (0xb6f82000)
        libgbm.so.2 => /usr/local/omap3-pvrsgx/lib/libgbm.so.2 (0xb6f68000)
        libudev.so.1 => /lib/arm-linux-gnueabihf/libudev.so.1 (0xb6f4e000)
        libwayland-server.so.0 => /usr/lib/arm-linux-gnueabihf/libwayland-server.so.0 (0xb6f34000)
        libdrm_omap.so.1 => /usr/lib/arm-linux-gnueabihf/libdrm_omap.so.1 (0xb6f21000)
        libffi.so.6 => /usr/lib/arm-linux-gnueabihf/libffi.so.6 (0xb6f0b000)
        libsrv_um.so.1 => /usr/local/omap3-pvrsgx/lib/libsrv_um.so.1 (0xb6ed4000)
        libdbm.so.1 => /usr/local/omap3-pvrsgx/lib/libdbm.so.1 (0xb6ec2000)
        libusc.so.1 => /usr/local/omap3-pvrsgx/lib/libusc.so.1 (0xb6e09000)
        libIMGegl.so.1 => /usr/local/omap3-pvrsgx/lib/libIMGegl.so.1 (0xb6de4000)
        libEGL.so.1 => /usr/local/omap3-pvrsgx/lib/libEGL.so.1 (0xb6dd2000)
        libGLES_CM.so.1 => /usr/local/omap3-pvrsgx/lib/libGLES_CM.so.1 (0xb6d69000)
        libc.so.6 => /lib/arm-linux-gnueabihf/libc.so.6 (0xb6c79000)
        /lib/ld-linux-armhf.so.3 (0xb6fb1000)
        libm.so.6 => /lib/arm-linux-gnueabihf/libm.so.6 (0xb6c05000)
        libexpat.so.1 => /lib/arm-linux-gnueabihf/libexpat.so.1 (0xb6bdd000)
        libdl.so.2 => /lib/arm-linux-gnueabihf/libdl.so.2 (0xb6bca000)
        libwayland-client.so.0 => /usr/lib/arm-linux-gnueabihf/libwayland-client.so.0 (0xb6bb1000)
        libglapi.so.0 => /usr/lib/arm-linux-gnueabihf/libglapi.so.0 (0xb6b74000)
        libpthread.so.0 => /lib/arm-linux-gnueabihf/libpthread.so.0 (0xb6b51000)
        librt.so.1 => /lib/arm-linux-gnueabihf/librt.so.1 (0xb6b3b000)
        libgcc_s.so.1 => /lib/arm-linux-gnueabihf/libgcc_s.so.1 (0xb6b12000)
root at letux:~# 

Ah, maybe an strace reveals more.

BR and thanks,
Nikolaus