From 91f8f105f2b82b4a38dee2d74760bc39d40ec42c Mon Sep 17 00:00:00 2001 From: Christopher Harvey Date: Fri, 31 May 2013 20:33:07 +0000 Subject: [PATCH] drm/mgag200: Add missing write to index before accessing data register This is a bug fix for some versions of g200se cards while doing mode-setting. Signed-off-by: Christopher Harvey Tested-by: Julia Lemire Acked-by: Julia Lemire Cc: stable@vger.kernel.org Signed-off-by: Dave Airlie --- drivers/gpu/drm/mgag200/mgag200_mode.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/mgag200/mgag200_mode.c b/drivers/gpu/drm/mgag200/mgag200_mode.c index 77b8a45fb10a..ee66badc8bb6 100644 --- a/drivers/gpu/drm/mgag200/mgag200_mode.c +++ b/drivers/gpu/drm/mgag200/mgag200_mode.c @@ -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; -- 2.34.1