This is a note to let you know that I've just added the patch titled
drm/mgag200: Black screen fix for G200e rev 4
to the 4.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-mgag200-black-screen-fix-for-g200e-rev-4.patch
and it can be found in the queue-4.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From d3922b69617b62bb2509936b68301f837229d9f0 Mon Sep 17 00:00:00 2001
From: Mathieu Larouche <mathieu.larouche@xxxxxxxxxx>
Date: Fri, 27 May 2016 15:12:50 -0400
Subject: drm/mgag200: Black screen fix for G200e rev 4
From: Mathieu Larouche <mathieu.larouche@xxxxxxxxxx>
commit d3922b69617b62bb2509936b68301f837229d9f0 upstream.
- 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>
Signed-off-by: Dave Airlie <airlied@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/mgag200/mgag200_mode.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
--- 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 mg
}
}
- 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 mg
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;
}
Patches currently in stable-queue which might be from mathieu.larouche@xxxxxxxxxx are
queue-4.6/drm-mgag200-black-screen-fix-for-g200e-rev-4.patch
--
To unsubscribe from this list: send the line "unsubscribe stable" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html