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Subject[PATCH 3.12 032/155] drm/radeon: fix interlaced modes on DCE8
Date
From: Alex Deucher <alexander.deucher@amd.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 77ae5f4b48a0445426c9c1ef7c0f28b717e35d55 upstream.

Need to double the viewport height.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
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 ba8742ab85ee..65344d65ff91 100644
--- a/drivers/gpu/drm/radeon/atombios_crtc.c
+++ b/drivers/gpu/drm/radeon/atombios_crtc.c
@@ -1278,6 +1278,9 @@ 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);

--
2.3.4


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