drm: cirrus: add power management support

[mirror_ubuntu-bionic-kernel.git] / drivers / gpu / drm / cirrus / cirrus_mode.c

diff --git a/drivers/gpu/drm/cirrus/cirrus_mode.c b/drivers/gpu/drm/cirrus/cirrus_mode.c
index 2d64aea83df21a05a74c7470ab8054350063e8df..f59433b7610c560db846a9e330a3b3a1b87c1f0b 100644 (file)
--- a/drivers/gpu/drm/cirrus/cirrus_mode.c
+++ b/drivers/gpu/drm/cirrus/cirrus_mode.c
@@ -308,6 +308,9 @@ static int cirrus_crtc_mode_set(struct drm_crtc *crtc,
 
        WREG_HDR(hdr);
        cirrus_crtc_do_set_base(crtc, old_fb, x, y, 0);
+
+       /* Unblank (needed on S3 resume, vgabios doesn't do it then) */
+       outb(0x20, 0x3c0);
        return 0;
 }