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drm/mgag200: Don't change unrelated registers during modeset

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Registers in indices below 0x18 are totally unrelated to modesetting,
so don't write 0's, or anything else into them on modeset. Most of
these registers are hardware cursor related, so this existing code
interferes with hardware cursor development.

Signed-off-by: Christopher Harvey <charvey@matrox.com>
Tested-by: Julia Lemire <jlemire@matrox.com>
Acked-by: Julia Lemire <jlemire@matrox.com>
Acked-by: Mathieu Larouche <mathieu.larouche@matrox.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Christopher Harvey 2013-04-12 20:42:19 +00:00 committed by Dave Airlie
parent b2dfcae3cc
commit 9d8aa55ff6
1 changed files with 1 additions and 5 deletions
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6
drivers/gpu/drm/mgag200/mgag200_mode.c
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@ -832,11 +832,7 @@ static int mga_crtc_mode_set(struct drm_crtc *crtc,
for (i = 0; i < sizeof(dacvalue); i++) {
if ((i <= 0x03) ||
(i == 0x07) ||
(i == 0x0b) ||
(i == 0x0f) ||
((i >= 0x13) && (i <= 0x17)) ||
if ((i <= 0x17) ||
(i == 0x1b) ||
(i == 0x1c) ||
((i >= 0x1f) && (i <= 0x29)) ||