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[v2,1/4] drm/mgag200: Don't change unrelated registers during modeset

Message ID f2ce86439bdd650259e1e7e2e0eabccd56a49a66.1368128053.git.charvey@matrox.com (mailing list archive)
State Accepted
Headers show

Commit Message

Christopher Harvey April 12, 2013, 8:42 p.m. UTC 
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>
---
 drivers/gpu/drm/mgag200/mgag200_mode.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)
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Patch

diff --git a/drivers/gpu/drm/mgag200/mgag200_mode.c b/drivers/gpu/drm/mgag200/mgag200_mode.c
index f988965..2d9333d 100644
--- a/drivers/gpu/drm/mgag200/mgag200_mode.c
+++ b/drivers/gpu/drm/mgag200/mgag200_mode.c
@@ -829,11 +829,7 @@  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)) ||