[bug#40835] [PATCH] Update to use panfrost for graphics hardware acceler

On Apr 27, 2020, at 12:15 PM, Vagrant Cascadian <address@hidden> wrote:

On 2020-04-24, Brian Woodcox wrote:
These patches add the panfrost graphics acceleration for the Pinebook
Pro laptop.

Thanks! Been working with the pinebook pro for some months now running
guix, and it's great to see others making progress on it. :)

You need to edit the /boot/extlinux/extlinux.conf file on the SD card and alter the FDTDIR line.

I changed mine from

FDTDIR /gnu/store/ls1byzmapi911cylh4s6044x0cmc61c8-linux-libre-pinebook-pro-5.6.0/lib/dtbs

to

FDTDIR /gnu/store/ls1byzmapi911cylh4s6044x0cmc61c8-linux-libre-pinebook-pro-5.6.0/lib/dtbs/rockchip

The u-boot-pinebook-pro-rk3399 on guix master works correctly as well as
the one from wip-pinebook-pro (should be the same).

This seems like your u-boot does not contain the correct value for
"fdtfile". It should be rockchip/rk3399-pinebook-pro.dtb. Are you
actually running an older u-boot? Did you at any point run saveenv from
u-boot, which saves the old u-boot configuration with an inappropriate
fdtfile variable?

It would be better to split up your patches into a separate patch
series, it is hard to review as one single large patch changing many
things.

I’m not sure what this problem is exactly. For some reason the rockchip folder is not being added
to the end of the patch for the FDTFILE, also, you do not need to actually specify the file as u-boot will
find it as long as it’s on the directory.

A few targeted comments below...

diff --git a/gnu/packages/gl.scm b/gnu/packages/gl.scm
index 01241cd88e..65fe389927 100644
--- a/gnu/packages/gl.scm
+++ b/gnu/packages/gl.scm
@@ -293,7 +294,7 @@ also known as DXTn or DXTC) for Mesa.")
       '(,@(match (%current-system)
             ((or "armhf-linux" "aarch64-linux")
              ;; TODO: Fix svga driver for aarch64 and armhf.
-              '("-Dgallium-drivers=etnaviv,freedreno,nouveau,r300,r600,swrast,tegra,v3d,vc4,virgl"))
+              '("-Dgallium-drivers=etnaviv,freedreno,kmsro,lima,nouveau,panfrost,r300,r600,swrast,tegra,v3d,vc4,virgl"))
             (_
              '("-Dgallium-drivers=iris,nouveau,r300,r600,radeonsi,svga,swrast,virgl")))
         ;; Enable various optional features. TODO: opencl requires libclc,

This last part of your mesa patch is already on core-updates. Looking
forward to when the rest is properly supported upstream!

Okay, thanks.

diff --git a/gnu/packages/linux.scm b/gnu/packages/linux.scm
index dd088ea24f..d4a36533ab 100644
--- a/gnu/packages/linux.scm
+++ b/gnu/packages/linux.scm
@@ -326,7 +327,7 @@ corresponding UPSTREAM-SOURCE (an origin), using the given DEBLOB-SCRIPTS."
                  (with-directory-excursion dir
                    (setenv "PYTHON" (which "python"))
                    (format #t "Running deblob script...~%")
-                    (force-output)
+                    (force-output))
                    (invoke "/tmp/bin/deblob"))

                  (format #t "~%Packing new Linux-libre tarball...~%")

This looks like leftovers from your hack breaking linux-libre :P

Doh, you are correct, my mistake. This should of course be left as the original code.

@@ -604,6 +605,7 @@ for ARCH and optionally VARIANT, or #f if there is no such configuration."
    ("CONFIG_SECURITY_DMESG_RESTRICT" . #t)
    ;; All kernels should have NAMESPACES options enabled
    ("CONFIG_NAMESPACES" . #t)
+    ("CONFIG_DRM_PANFROST" . #t)
    ("CONFIG_UTS_NS" . #t)
    ("CONFIG_IPC_NS" . #t)
    ("CONFIG_USER_NS" . #t)

This obviously can't be enabled on all architectures. In the
linux-libre-arm64-generic and linux-libre-pinebook-pro kernels it's
already enabled as a module.

It obviously makes debugging easier to be available earlier, but it also
bloats platforms that do not use this driver.

Okay.

diff --git a/gnu/packages/patches/mesa-skip-disk-cache-test.patch b/gnu/packages/patches/mesa-skip-disk-cache-test.patch
index 190f6b6ee1..585bf4f648 100644
--- a/gnu/packages/patches/mesa-skip-disk-cache-test.patch
+++ b/gnu/packages/patches/mesa-skip-disk-cache-test.patch
@@ -1,11 +1,6 @@
-disk_cache_create() here looks up the users home directory from <pwd.h>
-which resolves to "/" in the build environment. I could not find an easy
-way to set the home directory to something else, so we disable this test
-for now.
-
--- a/src/compiler/glsl/tests/cache_test.c
+++ b/src/compiler/glsl/tests/cache_test.c
-@@ -170,11 +170,6 @@
+@@ -219,11 +219,6 @@
unsetenv("MESA_GLSL_CACHE_DIR");
unsetenv("XDG_CACHE_HOME");

This removes a comment from the refreshed patch; I presume the comment
is still appropriate, though?

Yes, Patch should have been applied to d4c6e06f369024efc63e11de1a5bacd3fe9f7e8d as stated above.

diff --git a/gnu/packages/qt.scm b/gnu/packages/qt.scm
index 8696dc4bb6..a1e7684964 100644
--- a/gnu/packages/qt.scm
+++ b/gnu/packages/qt.scm
@@ -15,6 +15,7 @@
;;; Copyright © 2018 John Soo <address@hidden>
;;; Copyright © 2020 Mike Rosset <address@hidden>
;;; Copyright © 2020 Jakub Kądziołka <address@hidden>
+;;; Copyright © 2020 Brian C. Woodcox <address@hidden>
;;;
;;; This file is part of GNU Guix.
;;;
@@ -485,6 +486,7 @@ developers using C++ or QML, a CSS & _javascript_ like language.")
                 "-no-compile-examples"
                 ;; Most "-system-..." are automatic, but some use
                 ;; the bundled copy by default.
+                 "-opengl" "es2"
                 "-system-sqlite"
                 "-system-harfbuzz"
                 "-system-pcre"

This might break some things where a different opengl is the default,
some architectures or platforms may require a different opengl
implementation.

I seem to recall some conversations in Debian about the complexities
around which opengl to enable per-architecture or per-platform or ... a
complicated matrix of concerns.

Open to suggestions.

live well,
vagrant

From:	Brian Woodcox
Subject:	[bug#40835] [PATCH] Update to use panfrost for graphics hardware acceleration
Date:	Mon, 27 Apr 2020 15:17:34 -0600