[3.16.y-ckt stable] Patch "drm/radeon: fix interlaced modes on DCE8" has been added to staging queue

Luis Henriques luis.henriques at canonical.com
Thu Mar 19 10:13:19 UTC 2015

This is a note to let you know that I have just added a patch titled

    drm/radeon: fix interlaced modes on DCE8

to the linux-3.16.y-queue branch of the 3.16.y-ckt extended stable tree 
which can be found at:


This patch is scheduled to be released in version 3.16.7-ckt9.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.16.y-ckt tree, see



>From d379f9d5a10480adc543d87ef42ac5716f4a73b8 Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher at amd.com>
Date: Tue, 3 Mar 2015 17:00:43 -0500
Subject: drm/radeon: fix interlaced modes on DCE8

commit 77ae5f4b48a0445426c9c1ef7c0f28b717e35d55 upstream.

Need to double the viewport height.

Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
 drivers/gpu/drm/radeon/atombios_crtc.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c
index dce0d3918fa7..9f0e62529c46 100644
--- a/drivers/gpu/drm/radeon/atombios_crtc.c
+++ b/drivers/gpu/drm/radeon/atombios_crtc.c
@@ -1405,6 +1405,9 @@ static int dce4_crtc_do_set_base(struct drm_crtc *crtc,
 	       (x << 16) | y);
 	viewport_w = crtc->mode.hdisplay;
 	viewport_h = (crtc->mode.vdisplay + 1) & ~1;
+	if ((rdev->family >= CHIP_BONAIRE) &&
+	    (crtc->mode.flags & DRM_MODE_FLAG_INTERLACE))
+		viewport_h *= 2;
 	WREG32(EVERGREEN_VIEWPORT_SIZE + radeon_crtc->crtc_offset,
 	       (viewport_w << 16) | viewport_h);

More information about the kernel-team mailing list