This is a note to let you know that I've just added the patch titled
drm/i915: enable dip before writing data on gen4
to the 3.3-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-i915-enable-dip-before-writing-data-on-gen4.patch
and it can be found in the queue-3.3 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From c1230df7e19e0f27655c0eb9d966c7e03be7cc50 Mon Sep 17 00:00:00 2001
From: Paulo Zanoni <[email protected]>
Date: Wed, 2 May 2012 22:55:43 -0300
Subject: drm/i915: enable dip before writing data on gen4
From: Paulo Zanoni <[email protected]>
commit c1230df7e19e0f27655c0eb9d966c7e03be7cc50 upstream.
While testing with the intel_infoframes tool on gen4, I see that when
video DIP is disabled, what we write to the DATA memory is not exactly
what we read back later.
This regression has been introduce in
commit 64a8fc0145a1d0fdc25fc9367c2e6c621955fb3b
Author: Jesse Barnes <[email protected]>
Date: Thu Sep 22 11:16:00 2011 +0530
drm/i915: fix ILK+ infoframe support
That commit was setting VIDEO_DIP_CTL to 0 when initializing, which
caused the problem.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=43947
Tested-by: Yang Guang <[email protected]>
Signed-off-by: Paulo Zanoni <[email protected]>
Reviewed-by: Eugeni Dodonov <[email protected]>
[danvet: Pimped commit message by using the usual commit citation
layout.]
Signed-off-by: Daniel Vetter <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/gpu/drm/i915/intel_hdmi.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -136,7 +136,7 @@ static void i9xx_write_infoframe(struct
val &= ~VIDEO_DIP_SELECT_MASK;
- I915_WRITE(VIDEO_DIP_CTL, val | port | flags);
+ I915_WRITE(VIDEO_DIP_CTL, VIDEO_DIP_ENABLE | val | port | flags);
for (i = 0; i < len; i += 4) {
I915_WRITE(VIDEO_DIP_DATA, *data);
Patches currently in stable-queue which might be from [email protected]
are
queue-3.3/drm-i915-enable-dip-before-writing-data-on-gen4.patch
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