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drm/mgag200: Add missing write to index before accessing data register

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This is a bug fix for some versions of g200se cards while doing
mode-setting.

Signed-off-by: Christopher Harvey <charvey@matrox.com>
Tested-by: Julia Lemire <jlemire@matrox.com>
Acked-by: Julia Lemire <jlemire@matrox.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dave Airlie <airlied@gmail.com>
This commit is contained in:
Christopher Harvey 2013-05-31 20:33:07 +00:00 committed by Dave Airlie
parent b06f6a9d06
commit 91f8f105f2
1 changed files with 5 additions and 4 deletions
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9
drivers/gpu/drm/mgag200/mgag200_mode.c
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@ -1034,13 +1034,14 @@ static int mga_crtc_mode_set(struct drm_crtc *crtc,
else
hi_pri_lvl = 5;
WREG8(0x1fde, 0x06);
WREG8(0x1fdf, hi_pri_lvl);
WREG8(MGAREG_CRTCEXT_INDEX, 0x06);
WREG8(MGAREG_CRTCEXT_DATA, hi_pri_lvl);
} else {
WREG8(MGAREG_CRTCEXT_INDEX, 0x06);
if (mdev->reg_1e24 >= 0x01)
WREG8(0x1fdf, 0x03);
WREG8(MGAREG_CRTCEXT_DATA, 0x03);
else
WREG8(0x1fdf, 0x04);
WREG8(MGAREG_CRTCEXT_DATA, 0x04);
}
}
return 0;