radeon, kdb, kms: Save and restore the LUT on atomic KMS enter/exit

When changing VTs non-atomically the kernel works in conjunction with
the Xserver in user space and receives the LUT information from the
Xserver via a system call.  When changing modes atomically for kdb,
this information must be saved and restored without disturbing user
space as if nothing ever happened.

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
CC: Jesse Barnes <jbarnes@virtuousgeek.org>
CC: David Airlie <airlied@linux.ie>
CC: dri-devel@lists.freedesktop.org
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_legacy_crtc.c b/drivers/gpu/drm/radeon/radeon_legacy_crtc.c
index 8752d3447b72..42954785247f 100644
--- a/drivers/gpu/drm/radeon/radeon_legacy_crtc.c
+++ b/drivers/gpu/drm/radeon/radeon_legacy_crtc.c
@@ -355,6 +355,11 @@ int radeon_crtc_set_base_atomic(struct drm_crtc *crtc,
                                 struct drm_framebuffer *fb,
                                 int x, int y, int enter)
 {
+        if (enter)
+                radeon_crtc_save_lut(crtc);
+        else
+                radeon_crtc_restore_lut(crtc);
+
         return radeon_crtc_do_set_base(crtc, fb, x, y, 1);
 }