From 267dcdca8a45b18bb2bccf1ef9f68fa8a37fe279 Mon Sep 17 00:00:00 2001
From: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Date: Thu, 13 Apr 2023 20:20:22 +0300
Subject: [PATCH] docs: add missing MESA_VK_WSI_HEADLESS_SWAPCHAIN variable

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Sagar Ghuge <sagar.ghuge@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22478>
---
 docs/envvars.rst | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/docs/envvars.rst b/docs/envvars.rst
index b2c0ba7c2b4..d211fdcd998 100644
--- a/docs/envvars.rst
+++ b/docs/envvars.rst
@@ -320,6 +320,11 @@ Core Mesa environment variables
    ``VkSwapchainCreateInfoKHR::presentMode``. Values can be ``fifo``,
    ``relaxed``, ``mailbox`` or ``immediate``.
 
+.. envvar:: MESA_VK_WSI_HEADLESS_SWAPCHAIN
+
+   Forces all swapchains to be headless (no rendering will be display
+   in the swapchain's window).
+
 .. envvar:: MESA_VK_ABORT_ON_DEVICE_LOSS
 
    causes the Vulkan driver to call abort() immediately after detecting a