From 7b9cfea908a787d31d5458c386653c0780af0e86 Mon Sep 17 00:00:00 2001
From: Ron Nazarov <ron@noisytoot.org>
Date: Sat, 6 Dec 2025 03:02:21 +0000
Subject: [PATCH] gnu: mpv: Fix 100% CPU usage on wayland.

* gnu/packages/patches/mpv-0.40.0-fix-wayland-cpu-usage.patch: New file.
* gnu/packages/video.scm (mpv): Use it.
* gnu/local.mk (dist_patch_DATA): Add it.

Change-Id: I80244eacc0f8294f2b4e521217f68ada7a347bf4
Signed-off-by: Liliana Marie Prikler <liliana.prikler@gmail.com>
---
 gnu/local.mk                                  |  1 +
 .../mpv-0.40.0-fix-wayland-cpu-usage.patch    | 34 +++++++++++++++++++
 gnu/packages/video.scm                        |  3 +-
 3 files changed, 37 insertions(+), 1 deletion(-)
 create mode 100644 gnu/packages/patches/mpv-0.40.0-fix-wayland-cpu-usage.patch

diff --git a/gnu/local.mk b/gnu/local.mk
index 656315bdb79b2f6a1a070dd685a352d3e86a8306..7a6d044d9a2eadac3b2629f2fade65b8e530d040 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -1876,6 +1876,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/mpg321-CVE-2019-14247.patch		\
   %D%/packages/patches/mpg321-gcc-10.patch			\
   %D%/packages/patches/mpv-0.40.0-fix-ffmpeg-8.0.patch		\
+  %D%/packages/patches/mpv-0.40.0-fix-wayland-cpu-usage.patch	\
   %D%/packages/patches/modglue-fix-build.patch		\
   %D%/packages/patches/modem-manager-fix-test-wrapper.patch	\
   %D%/packages/patches/module-init-tools-moduledir.patch	\
diff --git a/gnu/packages/patches/mpv-0.40.0-fix-wayland-cpu-usage.patch b/gnu/packages/patches/mpv-0.40.0-fix-wayland-cpu-usage.patch
new file mode 100644
index 0000000000000000000000000000000000000000..fdc7d3714d2d969df4cb7e5b5fa6cdcbe8e4c09e
--- /dev/null
+++ b/gnu/packages/patches/mpv-0.40.0-fix-wayland-cpu-usage.patch
@@ -0,0 +1,34 @@
+Upstream-status: https://github.com/mpv-player/mpv/pull/16140
+
+From d20ded876d27497d3fe6a9494add8106b507a45c Mon Sep 17 00:00:00 2001
+From: llyyr <llyyr.public@gmail.com>
+Date: Fri, 28 Mar 2025 15:34:33 +0530
+Subject: [PATCH] clipboard-wayland: prevent reading from hung up fd
+
+This causes mpv to use up 100% of a core if there's an offer for a
+mime_type that mpv doesn't accept with ext_data_control clipboard
+backend.
+---
+ player/clipboard/clipboard-wayland.c | 6 ++++++
+ 1 file changed, 6 insertions(+)
+
+diff --git a/player/clipboard/clipboard-wayland.c b/player/clipboard/clipboard-wayland.c
+index c4a5e50472..bd8ac35af2 100644
+--- a/player/clipboard/clipboard-wayland.c
++++ b/player/clipboard/clipboard-wayland.c
+@@ -348,6 +348,12 @@ static bool clipboard_wayland_dispatch_events(struct clipboard_wayland_priv *wl,
+     if (fds[1].revents & POLLIN)
+         return false;
+ 
++    if (fds[2].revents & (POLLERR | POLLHUP | POLLNVAL))
++        destroy_offer(wl->selection_offer);
++
++    if (fds[3].revents & (POLLERR | POLLHUP | POLLNVAL))
++        destroy_offer(wl->primary_selection_offer);
++
+     if (fds[2].revents & POLLIN)
+         get_selection_data(wl, wl->selection_offer, false);
+ 
+-- 
+2.51.0
+
diff --git a/gnu/packages/video.scm b/gnu/packages/video.scm
index 724194e48e0367d7e7026e334dd04233e81769c5..3107c428457dff9d3fc003e638d6cfcbc0419b65 100644
--- a/gnu/packages/video.scm
+++ b/gnu/packages/video.scm
@@ -2743,7 +2743,8 @@ SVCD, DVD, 3ivx, DivX 3/4/5, WMV and H.264 movies.")
                (base32 "0w0qk61ll0mddbkiwavqfx048sacyvp6fwglms58ypw869rh7iy7"))
               (patches
                (search-patches
-                "mpv-0.40.0-fix-ffmpeg-8.0.patch"))))
+                "mpv-0.40.0-fix-ffmpeg-8.0.patch"
+                "mpv-0.40.0-fix-wayland-cpu-usage.patch"))))
     (build-system meson-build-system)
     (arguments
      (list