From 899918c53bf7cbc4c4f2cf9b08ee44b854a273f4 Mon Sep 17 00:00:00 2001
From: Joseph Kogut <joseph.kogut@gmail.com>
Date: Sun, 7 Jun 2026 19:06:09 -0700
Subject: [PATCH] package/qemu: add virglrenderer integration

Add optional virglrenderer integration, along with enabling OpenGL when
necessary.

https://qemu.readthedocs.io/en/v10.0.3/system/devices/virtio-gpu.html#virtio-gpu-virglrenderer

Signed-off-by: Joseph Kogut <joseph.kogut@gmail.com>
Signed-off-by: Romain Naour <romain.naour@smile.fr>
---
 package/qemu/Config.in | 21 +++++++++++++++++++++
 package/qemu/qemu.mk   |  7 +++++++
 2 files changed, 28 insertions(+)

diff --git a/package/qemu/Config.in b/package/qemu/Config.in
index 8e932c014f..bfb8ccea88 100644
--- a/package/qemu/Config.in
+++ b/package/qemu/Config.in
@@ -126,6 +126,27 @@ config BR2_PACKAGE_QEMU_OPENGL
 comment "OpenGL support needs an OpenGL and/or OpenGL EGL backend"
 	depends on !(BR2_PACKAGE_HAS_LIBEGL || BR2_PACKAGE_HAS_LIBGL)
 
+config BR2_PACKAGE_QEMU_VIRGLRENDERER
+	bool "Enable virglrenderer"
+	depends on BR2_PACKAGE_HAS_LIBEGL || BR2_PACKAGE_HAS_LIBGL
+	select BR2_PACKAGE_QEMU_OPENGL
+	select BR2_PACKAGE_VIRGLRENDERER
+	help
+	  Say 'y' to enable qemu support for virglrenderer.
+	  virglrenderer backends such as virgl, venus, or DRM native
+	  context are configured under the virglrenderer package.
+
+	  Run qemu with `-device virtio-gpu-gl`
+
+	  https://qemu.readthedocs.io/en/v10.0.3/system/devices/virtio-gpu.html#virtio-gpu-virglrenderer
+
+comment "virglrenderer needs OpenGL accelerated display frontend support"
+	depends on !(BR2_PACKAGE_HAS_LIBEGL || BR2_PACKAGE_HAS_LIBGL)
+
+comment "virglrenderer needs virgl, venus, or a DRM backend for guest acceleration"
+	depends on BR2_PACKAGE_QEMU_VIRGLRENDERER
+	depends on !BR2_PACKAGE_VIRGLRENDERER_HAS_BACKEND
+
 config BR2_PACKAGE_QEMU_FDT
 	bool "Enable FDT"
 	select BR2_PACKAGE_DTC
diff --git a/package/qemu/qemu.mk b/package/qemu/qemu.mk
index aff1762fb9..4f4786532c 100644
--- a/package/qemu/qemu.mk
+++ b/package/qemu/qemu.mk
@@ -279,6 +279,13 @@ else
 QEMU_OPTS += --disable-opengl
 endif
 
+ifeq ($(BR2_PACKAGE_QEMU_VIRGLRENDERER),y)
+QEMU_OPTS += --enable-virglrenderer
+QEMU_DEPENDENCIES += virglrenderer
+else
+QEMU_OPTS += --disable-virglrenderer
+endif
+
 ifeq ($(BR2_STATIC_LIBS),y)
 QEMU_OPTS += --static
 endif