docs: document useful radeonsi env variables

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/15559>

diff --git a/docs/envvars.rst b/docs/envvars.rst
index b751516ba50e92d5d40738bba17b64dbfdfb28a1..874e6c1571510c25b6d5f190aadb51144741aa33 100644 (file)
--- a/docs/envvars.rst
+++ b/docs/envvars.rst
@@ -763,13 +763,24 @@ RADV driver environment variables
 radeonsi driver environment variables
 -------------------------------------
 
+:envvar:`radeonsi_no_infinite_interp`
+   Kill PS with infinite interp coeff (might fix hangs)
+
+:envvar:`radeonsi_clamp_div_by_zero`
+   Clamp div by zero (x / 0 becomes FLT_MAX instead of NaN) (might fix rendering corruptions)
+
+:envvar:`radeonsi_zerovram`
+   Clear all allocated memory to 0 before usage (might fix rendering corruptions)
+
 :envvar:`AMD_DEBUG`
    a comma-separated list of named flags, which do various things:
 
    ``nodcc``
       Disable DCC.
    ``nodccclear``
-      Disable DCC fast clear.
+      Disable DCC fast clear
+   ``nodisplaydcc``
+      disable Delta Color Compression (DCC) on displayable images
    ``nodccmsaa``
       Disable DCC for MSAA
    ``nodpbb``