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-rw-r--r--libre/mesa-libcl/0001-i965-import-prime-buffers-in-the-current-context-not.patch66
1 files changed, 66 insertions, 0 deletions
diff --git a/libre/mesa-libcl/0001-i965-import-prime-buffers-in-the-current-context-not.patch b/libre/mesa-libcl/0001-i965-import-prime-buffers-in-the-current-context-not.patch
new file mode 100644
index 000000000..0b37366f6
--- /dev/null
+++ b/libre/mesa-libcl/0001-i965-import-prime-buffers-in-the-current-context-not.patch
@@ -0,0 +1,66 @@
+From e180e9e3c830d3611a6cf7d32e988b4c28d20942 Mon Sep 17 00:00:00 2001
+From: Martin Peres <martin.peres@linux.intel.com>
+Date: Wed, 3 Aug 2016 12:58:23 +0300
+Subject: [PATCH] i965: import prime buffers in the current context, not screen
+
+This mirrors the codepath taken by DRI2 in IntelSetTexBuffer2() and
+fixes many applications when using DRI3:
+ - Totem with libva on hw-accelerated decoding
+ - obs-studio, using Window Capture (Xcomposite) as a Source
+ - gstreamer with VAAPI
+
+Cc: mesa-stable@lists.freedesktop.org
+Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=71759
+Signed-off-by: Martin Peres <martin.peres@linux.intel.com>
+---
+ src/mesa/drivers/dri/i965/intel_screen.c | 25 +++++++++++++++++++++++--
+ 1 file changed, 23 insertions(+), 2 deletions(-)
+
+diff --git a/src/mesa/drivers/dri/i965/intel_screen.c b/src/mesa/drivers/dri/i965/intel_screen.c
+index ae51c40..169d578 100644
+--- a/src/mesa/drivers/dri/i965/intel_screen.c
++++ b/src/mesa/drivers/dri/i965/intel_screen.c
+@@ -702,8 +702,11 @@ intel_create_image_from_fds(__DRIscreen *screen,
+ int *fds, int num_fds, int *strides, int *offsets,
+ void *loaderPrivate)
+ {
++ GET_CURRENT_CONTEXT(ctx);
+ struct intel_screen *intelScreen = screen->driverPrivate;
++ struct brw_context *brw = brw_context(ctx);
+ struct intel_image_format *f;
++ dri_bufmgr *bufmgr;
+ __DRIimage *image;
+ int i, index;
+
+@@ -744,8 +747,26 @@ intel_create_image_from_fds(__DRIscreen *screen,
+ size = end;
+ }
+
+- image->bo = drm_intel_bo_gem_create_from_prime(intelScreen->bufmgr,
+- fds[0], size);
++ /* Let's import the buffer into the current context instead of the current
++ * screen as some applications like gstreamer, totem, or obs create multiple
++ * X connections which end up creating multiple screens and thus multiple
++ * buffer managers. They then proceed to use a different X connection than
++ * the one used by the currently-bound context to call GLXBindTexImageExt()
++ * which should then import the buffer in the current bound context and not
++ * the current screen. This is done properly upstairs for texture management
++ * so we need to mirror this behaviour if we don't want the kernel rejecting
++ * our pushbuffers as the buffer would not have been imported by the same
++ * buffer manager that sent the pushbuffer referencing it.
++ *
++ * If there is no context currently bound, then revert to using the screen's
++ * buffer manager and hope for the best...
++ */
++ if (brw)
++ bufmgr = brw->bufmgr;
++ else
++ bufmgr = intelScreen->bufmgr;
++
++ image->bo = drm_intel_bo_gem_create_from_prime(bufmgr, fds[0], size);
+ if (image->bo == NULL) {
+ free(image);
+ return NULL;
+--
+2.9.0
+