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