From 124263b8feae1b45d3d7fd4cd245cb00ea6e0cc4 Mon Sep 17 00:00:00 2001
From: Jocelyn Falempe <jfalempe@redhat.com>
Date: Wed, 4 May 2022 15:40:24 +0200
Subject: drm/mgag200: Add FB_DAMAGE_CLIPS support
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Git-commit: 3064debaf55e1bc8f191871ca5f82697ef4c0951
Patch-mainline: v6.0-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225 jsc#PED-2849
The driver does support damage clips, but doesn't advertise it.
So when running gnome/wayland on Matrox hardware, the full frame is
copied to the slow Matrox memory, which leads to very poor performances.
Add drm_plane_enable_fb_damage_clips() to advertise this capability to
userspace.
With this patch, gnome/wayland becomes usable on Matrox GPU.
Suggested-by: Jonas Ådahl <jadahl@gmail.com>
Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20220504134026.283417-2-jfalempe@redhat.com
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/mgag200/mgag200_mode.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/mgag200/mgag200_mode.c b/drivers/gpu/drm/mgag200/mgag200_mode.c
index abde7655477d..a77da57f1022 100644
--- a/drivers/gpu/drm/mgag200/mgag200_mode.c
+++ b/drivers/gpu/drm/mgag200/mgag200_mode.c
@@ -1121,6 +1121,8 @@ int mgag200_modeset_init(struct mga_device *mdev)
return ret;
}
+ drm_plane_enable_fb_damage_clips(&pipe->plane);
+
/* FIXME: legacy gamma tables; convert to CRTC state */
drm_mode_crtc_set_gamma_size(&pipe->crtc, MGAG200_LUT_SIZE);
--
2.38.1