sync_up: Discussion page for tomorrow's meeting

[libreriscv.git] / 3d_gpu / mesa.mdwn

diff --git a/3d_gpu/mesa.mdwn b/3d_gpu/mesa.mdwn
index 4c315650502af9ce0b56a81500613624e6e423e0..c67d71fe577fa6ca381121a0fb190d2a67111a4f 100644 (file)
--- a/3d_gpu/mesa.mdwn
+++ b/3d_gpu/mesa.mdwn
@@ -1,4 +1,4 @@
-# MESA Driver sponsored by NLNet
+# MESA Driver sponsored by NLnet
 
 todo http://lists.libre-soc.org/pipermail/libre-soc-dev/2020-August/000246.html
 
@@ -17,6 +17,7 @@ In order to install a `meson` version recent enough to configure `mesa`, add bus
 
 Install `meson` (version 52.0 or later):
 
+    apt-get update -y
     apt-get install -y -t buster-backports meson
 
 Then install the necessary packages by running the following commands as root:
@@ -71,16 +72,25 @@ In order for meson to be able to find the up-to-date `drm` files we have just bu
 
     export PKG_CONFIG_PATH=~/opt/lsoc_mesa/lib/x86_64-linux-gnu/pkgconfig/
 
+These following `vulkan`-specific environment variables are necessary to build our branch of mesa successfully:
+
+    export VK_ICD_FILENAMES=/home/$USER/opt/lsoc_mesa/share/vulkan/icd.d/libresoc_icd.x86_64.json
+    export VK_LOADER_DEBUG=warn
+    export LIBRESOC_TRACE=1
+
 Now change back to the base `~/opt` directory and clone the `mesa` git repo from the `mesa` gitlab instance. Change to the `mesa` directory. Create a build directory and cd into it.
 
     cd ~/opt
-    git clone https://gitlab.freedesktop.org/mesa/mesa.git
+    git clone https://git.libre-soc.org/git/mesa.git
+    git pull --rebase origin libresoc_dev
+    git checkout -b libresoc_dev
     cd mesa
     mkdir build && cd build
 
 In order to configure `mesa` for building and installation run the following command. Again, it is *very* important to specify `prefix=/home/$USER/opt/lsoc_mesa` because as mentioned above we need these files for development purposes, but we do not want to corrupt or interfere with our *system* `mesa` libraries.
 
-    meson -Dbuildtype=debug -Dprefix=/home/$USER/opt/lsoc_mesa                
+    meson -Dbuildtype=debug -Dprefix=/home/$USER/opt/lsoc_mesa \
+     -Dvulkan-drivers=libre-soc ..             
 
 After configuration has completed, run ninja to build and install the `mesa` libraries.
 
@@ -88,13 +98,8 @@ After configuration has completed, run ninja to build and install the `mesa` lib
 
 # From here on is solely Vivek's instructions
 
-I also have script to set few environment variables like
-
-    export VK_ICD_FILENAMES=/home/vivek/install/share/vulkan/icd.d/libresoc_icd.x86_64.json
-    export VK_LOADER_DEBUG=warn
-    export LIBRESOC_TRACE=1
-
 To test the code I am sing simple tests built by
+
     https://github.com/GameTechDev/IntroductionToVulkan
 
 I am also using debug build for vulkan loader if any one interested in that
@@ -107,13 +112,20 @@ https://gitlab.freedesktop.org/vivekvpandya/mesa/-/tree/libresoc_dev
 previously it was on master so it will cause me problems working on master
 branch.
 
-Also note slight change in meson configure command
-meson -Dbuildtype=debug -Dprefix=/home/vivek/install
--Dvulkan-drivers=libre-soc ..
-
-instead of libresoc it is libre-soc for vulkan-drivers option.
-
 # Running vulkan intro tutorial
 
 * <https://github.com/GameTechDev/IntroductionToVulkan/tree/master/Project/Tutorials/01>
 * <http://lists.libre-soc.org/pipermail/libre-soc-dev/2020-August/000368.html>
+
+# Demos with lavapipe
+
+> It can be built with 
+> meson configure -Dvulkan-drivers=swrast -Dgallium-drivers=swrast
+> set VK_ICD_FILENAMES to the lvp_icd.x86_64.json file and vulkaninfo should
+> show it.
+> 
+> I tried running demos from
+> https://software.intel.com/content/www/us/en/develop/articles/api-without-
+> secrets-introduction-to-vulkan-part-1.html and all 7 runs fine with lavapipe.
+
+* <https://bugs.libre-soc.org/show_bug.cgi?id=251#c58>