From: Thomas Richter <thor@math.tu-berlin.de>
To: Daniel Vetter <daniel@ffwll.ch>
Cc: intel-gfx <intel-gfx@lists.freedesktop.org>
Subject: Re: Workaround for flicker with panning on the i830 - found a way for tiled displays
Date: Fri, 15 Nov 2013 17:08:45 +0100 [thread overview]
Message-ID: <5286470D.3070004@math.tu-berlin.de> (raw)
In-Reply-To: <10422_1384530087_528640A7_10422_3841_1_20131115154159.GU22741@phenom.ffwll.local>
Am 15.11.2013 16:41, schrieb Daniel Vetter:
>
> Gosh, should have read the code more closely. We have a totally botched wm
> setup on i830M - the watermark code for the 2nd pipe is just not there!
(-: Guess that explains something. Just disregard my earlier patch,
simply superfluous.
In the meantime, I recompiled the code and *decreased* the latency from
5000 to 3000, then getting a stable image,
even the boot console is then stable (has never been before). Its still
off by half a screen, but no longer flickering
left and right.
However, what I do not understand about the watermark computation is
that a *lower* latency results in a *higher* number
of entries in the FIFO. Shouldn't this quite the reverse?
In specific, I do not understand the subtraction in intel_calculate_wm,
line 1058.
Anyhow, I let you proceed with the patch and I'm ready and happy to test it.
Greetings,
Thomas
next prev parent reply other threads:[~2013-11-15 16:08 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 ` Workaround for flicker with panning on the i830 - found a way for tiled displays Thomas Richter
2013-11-15 15:41 ` Daniel Vetter
[not found] ` <10422_1384530087_528640A7_10422_3841_1_20131115154159.GU22741@phenom.ffwll.local>
2013-11-15 16:08 ` Thomas Richter [this message]
2013-11-15 17:01 ` Thomas Richter
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=5286470D.3070004@math.tu-berlin.de \
--to=thor@math.tu-berlin.de \
--cc=daniel@ffwll.ch \
--cc=intel-gfx@lists.freedesktop.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.