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From f2da0e2f686ee16ddd3a4e92e06ef3a55ec80472 Mon Sep 17 00:00:00 2001
From: "Miguel A. Vico" <mvicomoya@nvidia.com>
Date: Tue, 4 Apr 2017 14:39:47 -0700
Subject: [PATCH 1/9] compositor-drm: Release current & next fb when
 deactivating the session
X-NVConfidentiality: public

With

     commit 47224cc9312fef05c1a523ea0da0a1aae66f100d
     Author: Daniel Stone <daniels@collabora.com>
     Date:   Sat Nov 5 08:04:07 2016 +0000

         compositor-drm: Delete drm_backend_set_modes

we stopped forcing a modeset when restoring the session. The motivation
was that we would use a stale fb, so better to let the next repaint
handle it.

However, if drm_output::current != NULL, we won't issue a modeset upon
repaint.

This change releases both drm_output::current and drm_output::next when
deactivating the current session. This ensures the very first repaint
after restoring the session will issue a modeset.

Signed-off-by: Miguel A Vico Moya <mvicomoya@nvidia.com>
---
 libweston/compositor-drm.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/libweston/compositor-drm.c b/libweston/compositor-drm.c
index 8e1e788f..63153271 100644
--- a/libweston/compositor-drm.c
+++ b/libweston/compositor-drm.c
@@ -3164,6 +3164,14 @@ session_notify(struct wl_listener *listener, void *data)
 		wl_list_for_each(output, &compositor->output_list, base.link) {
 			output->base.repaint_needed = false;
 			drmModeSetCursor(b->drm.fd, output->crtc_id, 0, 0, 0);
+			if (output->fb_current != NULL) {
+				drm_fb_unref(output->fb_current);
+				output->fb_current = NULL;
+			}
+			if (output->fb_pending != NULL) {
+				drm_fb_unref(output->fb_pending);
+				output->fb_pending = NULL;
+			}
 		}
 
 		output = container_of(compositor->output_list.next,
-- 
2.13.3