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From 4c23158f81c3c4b91353150fd4c28246ce1e692f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jonas=20=C3=85dahl?= <jadahl@gmail.com>
Date: Fri, 3 Dec 2021 11:07:00 +0100
Subject: [PATCH 4/5] renderer/native: Allow forcing EGLStream backend
The GBM support in the NVIDIA driver is fairly new, and to make it
easier to identify whether a problem encountered is related to using GBM
instead of EGLStreams, add a debug environment variable to force using
EGLStream instead of GBM.
To force using EGLStream instead of GBM, use
MUTTER_DEBUG_FORCE_EGL_STREAM=1
Related: https://gitlab.gnome.org/GNOME/mutter/-/issues/2045
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2132>
(cherry picked from commit d43cc776ef733251fc02e8e62669ea4ba7e68e2c)
---
src/backends/native/meta-renderer-native.c | 26 ++++++++++++++++------
1 file changed, 19 insertions(+), 7 deletions(-)
diff --git a/src/backends/native/meta-renderer-native.c b/src/backends/native/meta-renderer-native.c
index e7460fbf1..0cd7a27d6 100644
--- a/src/backends/native/meta-renderer-native.c
+++ b/src/backends/native/meta-renderer-native.c
@@ -1765,7 +1765,7 @@ meta_renderer_native_create_renderer_gpu_data (MetaRendererNative *renderer_nat
MetaGpuKms *gpu_kms,
GError **error)
{
- MetaRendererNativeGpuData *gbm_renderer_gpu_data;
+ MetaRendererNativeGpuData *gbm_renderer_gpu_data = NULL;
GError *gbm_error = NULL;
#ifdef HAVE_EGL_DEVICE
MetaRendererNativeGpuData *egl_stream_renderer_gpu_data;
@@ -1775,14 +1775,26 @@ meta_renderer_native_create_renderer_gpu_data (MetaRendererNative *renderer_nat
if (!gpu_kms)
return create_renderer_gpu_data_surfaceless (renderer_native, error);
- gbm_renderer_gpu_data = create_renderer_gpu_data_gbm (renderer_native,
- gpu_kms,
- &gbm_error);
- if (gbm_renderer_gpu_data)
+#ifdef HAVE_EGL_DEVICE
+ if (g_strcmp0 (getenv ("MUTTER_DEBUG_FORCE_EGL_STREAM"), "1") != 0)
+#endif
+ {
+ gbm_renderer_gpu_data = create_renderer_gpu_data_gbm (renderer_native,
+ gpu_kms,
+ &gbm_error);
+ if (gbm_renderer_gpu_data)
+ {
+ if (gbm_renderer_gpu_data->secondary.is_hardware_rendering)
+ return gbm_renderer_gpu_data;
+ }
+ }
+#ifdef HAVE_EGL_DEVICE
+ else
{
- if (gbm_renderer_gpu_data->secondary.is_hardware_rendering)
- return gbm_renderer_gpu_data;
+ g_set_error (&gbm_error, G_IO_ERROR, G_IO_ERROR_FAILED,
+ "GBM backend was disabled using env var");
}
+#endif
#ifdef HAVE_EGL_DEVICE
egl_stream_renderer_gpu_data =
--
2.35.1