From: Thomas Richter <thor@math.tu-berlin.de>
To: Daniel Vetter <daniel@ffwll.ch>
Cc: intel-gfx <intel-gfx@lists.freedesktop.org>
Subject: Workaround for flicker with panning on the i830 - found a way for tiled displays
Date: Fri, 15 Nov 2013 14:16:11 +0100 [thread overview]
Message-ID: <52861E9B.5080509@math.tu-berlin.de> (raw)
In-Reply-To: <26136_1384453961_52851749_26136_18549_1_20131114183308.GI22741@phenom.ffwll.local>
Hi Daniel, hi others,
did even more experiments. I guess I understand now better. Indeed, the
trouble seems to be the watermark levels. I played more
with all that, and the real culprit seems to be the FW_BLC register
controlling the watermarks.
On the i830 with the current settings, it is defined to be 0x1080304
which sets the watermark a bit too low. If I set it to
0x1080306 instead, I get a stable display in all panning positions
(hurray!).
I would like to fix this, but I guess I would need to understand the
logic a little bit better. At the time being, you probably better
put the linear frame buffer workaround on hold, it looks I really got
something here.
Greetings,
Thomas
next prev parent reply other threads:[~2013-11-15 13:16 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-07 10:05 [PATCH 1/7] drm/i915: Optimize pipe irq handling on bdw Daniel Vetter
2013-11-07 10:05 ` [PATCH 2/7] drm/i915: Fix up the bdw pipe interrupt enable lists Daniel Vetter
2013-11-07 13:49 ` [PATCH] " Daniel Vetter
2013-11-07 14:00 ` Ville Syrjälä
2013-11-07 10:05 ` [PATCH 3/7] drm/i915: Wire up port A aux channel Daniel Vetter
2013-11-07 13:20 ` Ville Syrjälä
2013-11-07 13:49 ` [PATCH] " Daniel Vetter
2013-11-07 13:59 ` Ville Syrjälä
2013-11-07 10:05 ` [PATCH 4/7] drm/i915: Wire up PCH interrupts for bdw Daniel Vetter
2013-11-07 10:05 ` [PATCH 5/7] drm/i915: Wire up pipe CRC support " Daniel Vetter
2013-11-07 10:05 ` [PATCH 6/7] drm/i915: Optimize gen8_enable|disable_vblank functions Daniel Vetter
2013-11-07 13:37 ` Ville Syrjälä
2013-11-07 14:31 ` [PATCH 1/2] drm/i915: Mask the vblank interrupt on bdw by default Daniel Vetter
2013-11-07 14:31 ` [PATCH 2/2] drm/i915/bdw: Take render error interrupt out of the mask Daniel Vetter
2013-11-07 14:35 ` [PATCH 1/2] drm/i915: Mask the vblank interrupt on bdw by default Ville Syrjälä
2013-11-07 10:05 ` [PATCH 7/7] drm/i915: Wire up cpu fifo underrun reporting support for bdw Daniel Vetter
2013-11-07 13:08 ` [PATCH 1/7] drm/i915: Optimize pipe irq handling on bdw Ville Syrjälä
2013-11-07 13:45 ` Ville Syrjälä
2013-11-08 7:57 ` Daniel Vetter
[not found] ` <32493_1383921850_527CF8B9_32493_10045_1_20131108075743.GZ14082@phenom.ffwll.local>
2013-11-08 15:25 ` [PATCH] Workaround for flicker with panning on the i830 Thomas Richter
2013-11-08 16:32 ` Daniel Vetter
[not found] ` <32493_1383928311_527D11F3_32493_10984_1_20131108163213.GC14082@phenom.ffwll.local>
2013-11-11 15:33 ` Thomas Richter
2013-11-11 15:43 ` Daniel Vetter
[not found] ` <1565_1384184620_5280FB2C_1565_9181_1_CAKMK7uF2UmKJHvVPrzE7-7A9DQ5JrLHAFnDiuVUDHFU+DoOXww@mail.gmail.com>
2013-11-12 16:41 ` Thomas Richter
2013-11-12 17:22 ` Daniel Vetter
[not found] ` <1565_1384276909_528263AC_1565_19510_1_20131112172217.GB3741@phenom.ffwll.local>
2013-11-13 19:50 ` Thomas Richter
2013-11-13 20:20 ` Daniel Vetter
[not found] ` <26136_1384374018_5283DF02_26136_9623_1_20131113202049.GH7251@phenom.ffwll.local>
2013-11-14 7:14 ` Thomas Richter
2013-11-14 8:21 ` Daniel Vetter
[not found] ` <26136_1384417275_528487FB_26136_12808_1_CAKMK7uEfiAoFutfk=mtqteuV07t5SneGniyXnRet_T3Bs4spRw@mail.gmail.com>
2013-11-14 18:15 ` Thomas Richter
2013-11-14 18:33 ` Daniel Vetter
[not found] ` <26136_1384453961_52851749_26136_18549_1_20131114183308.GI22741@phenom.ffwll.local>
2013-11-15 13:16 ` Thomas Richter [this message]
2013-11-15 15:41 ` Workaround for flicker with panning on the i830 - found a way for tiled displays Daniel Vetter
[not found] ` <10422_1384530087_528640A7_10422_3841_1_20131115154159.GU22741@phenom.ffwll.local>
2013-11-15 16:08 ` Thomas Richter
2013-11-15 17:01 ` Thomas Richter
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