This is a note to let you know that I've just added the patch titled
drm/radeon: Set DESKTOP_HEIGHT register to the framebuffer (not mode)
height.
to the 3.2-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-radeon-set-desktop_height-register-to-the-framebuffer-not-mode-height.patch
and it can be found in the queue-3.2 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 1b61925061660009f5b8047f93c5297e04541273 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Michel=20D=C3=A4nzer?= <[email protected]>
Date: Wed, 1 Feb 2012 12:09:55 +0100
Subject: drm/radeon: Set DESKTOP_HEIGHT register to the framebuffer (not mode)
height.
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From: =?UTF-8?q?Michel=20D=C3=A4nzer?= <[email protected]>
commit 1b61925061660009f5b8047f93c5297e04541273 upstream.
The value of this register is transferred to the V_COUNTER register at the
beginning of vertical blank. V_COUNTER is the reference for VLINE waits and
goes from VIEWPORT_Y_START to VIEWPORT_Y_START+VIEWPORT_HEIGHT during scanout,
so if VIEWPORT_Y_START is not 0, V_COUNTER actually went backwards at the
beginning of vertical blank, and VLINE waits excluding the whole scanout area
could never finish (possibly only if VIEWPORT_Y_START is larger than the length
of vertical blank in scanlines). Setting DESKTOP_HEIGHT to the framebuffer
height should prevent this for any kind of VLINE wait.
Fixes https://bugs.freedesktop.org/show_bug.cgi?id=45329 .
Signed-off-by: Michel Dänzer <[email protected]>
Reviewed-by: Alex Deucher <[email protected]>
Signed-off-by: Dave Airlie <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/gpu/drm/radeon/atombios_crtc.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/gpu/drm/radeon/atombios_crtc.c
+++ b/drivers/gpu/drm/radeon/atombios_crtc.c
@@ -1189,7 +1189,7 @@ static int dce4_crtc_do_set_base(struct
WREG32(EVERGREEN_GRPH_ENABLE + radeon_crtc->crtc_offset, 1);
WREG32(EVERGREEN_DESKTOP_HEIGHT + radeon_crtc->crtc_offset,
- crtc->mode.vdisplay);
+ target_fb->height);
x &= ~3;
y &= ~1;
WREG32(EVERGREEN_VIEWPORT_START + radeon_crtc->crtc_offset,
@@ -1358,7 +1358,7 @@ static int avivo_crtc_do_set_base(struct
WREG32(AVIVO_D1GRPH_ENABLE + radeon_crtc->crtc_offset, 1);
WREG32(AVIVO_D1MODE_DESKTOP_HEIGHT + radeon_crtc->crtc_offset,
- crtc->mode.vdisplay);
+ target_fb->height);
x &= ~3;
y &= ~1;
WREG32(AVIVO_D1MODE_VIEWPORT_START + radeon_crtc->crtc_offset,
Patches currently in stable-queue which might be from [email protected] are
queue-3.2/drm-radeon-set-desktop_height-register-to-the-framebuffer-not-mode-height.patch
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