From: Mathieu Larouche <mathieu.larouche@xxxxxxxxxx>
- Fixed black screen for some resolutions of G200e rev4
- Fixed testm & testn which had predetermined value.
Reported-by: Jan Beulich <jbeulich@xxxxxxxx>
Signed-off-by: Mathieu Larouche <mathieu.larouche@xxxxxxxxxx>
---
drivers/gpu/drm/mgag200/mgag200_mode.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/mgag200/mgag200_mode.c b/drivers/gpu/drm/mgag200/mgag200_mode.c
index 14e64e0..9baee8b 100644
--- a/drivers/gpu/drm/mgag200/mgag200_mode.c
+++ b/drivers/gpu/drm/mgag200/mgag200_mode.c
@@ -182,7 +182,7 @@ static int mga_g200se_set_plls(struct mga_device *mdev, long clock)
}
}
- fvv = pllreffreq * testn / testm;
+ fvv = pllreffreq * (n + 1) / (m + 1);
fvv = (fvv - 800000) / 50000;
if (fvv > 15)
@@ -202,6 +202,14 @@ static int mga_g200se_set_plls(struct mga_device *mdev, long clock)
WREG_DAC(MGA1064_PIX_PLLC_M, m);
WREG_DAC(MGA1064_PIX_PLLC_N, n);
WREG_DAC(MGA1064_PIX_PLLC_P, p);
+
+ if (mdev->unique_rev_id >= 0x04) {
+ WREG_DAC(0x1a, 0x09);
+ msleep(20);
+ WREG_DAC(0x1a, 0x01);
+
+ }
+
return 0;
}
--
1.8.3.1
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