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drm/radeon: fix interlaced modes on DCE8

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Need to double the viewport height.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Alex Deucher 2015-03-03 17:00:43 -05:00
parent a28b2a47ed
commit 77ae5f4b48
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/radeon/atombios_crtc.c
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@ -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);