From: "Ville Syrjälä" <ville.syrjala@linux.intel.com>
To: One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>
Cc: sagar.a.kamble@intel.com, daniel.vetter@ffwll.ch,
intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org,
vijay.a.purushothaman@intel.com, tomi.valkeinen@ti.com,
dri-devel@lists.freedesktop.org, gregkh@linuxfoundation.org,
joe@perches.com, airlied@redhat.com
Subject: Re: [PATCH v4 00/11] Enabling 180 degree rotation for sprite and crtc planes
Date: Mon, 10 Feb 2014 16:29:45 +0200 [thread overview]
Message-ID: <20140210142945.GP3891@intel.com> (raw)
In-Reply-To: <20140210141454.7f8e25e6@alan.etchedpixels.co.uk>
On Mon, Feb 10, 2014 at 02:14:54PM +0000, One Thousand Gnomes wrote:
> > > Does this mean it should also handle horizontal mirroring in
> > > hardware (180° rotate, and scan lines backwards combined) ?
> >
> > Our hardware doesn't support mirroring (h or v). Well, unless you
> > count h+v mirroring since that's 180 degree rotation :)
> >
> > Anyways IIRC the old video overlay (present on gen2-4) was the only plane
> > to ever support mirroring on Intel hardware. With all other planes we're
> > limited to 0 and 180 degree rotation
>
> It seems to do vertical mirroring providing your output buffer is
> allocated and aligned on page boundaries as the GTT can then be used to
> map the scan lines in any order you like ?
Oh, right. That would be possible, but that sounds like something that
needs to be done on the gem side rather than the kms side since it
impacts other things besides scanout memory access. Well either that
or we'd potentially need to map the same object multiple times into
the ggtt.
--
Ville Syrjälä
Intel OTC
next prev parent reply other threads:[~2014-02-10 14:29 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-07 13:45 [PATCH v4 00/11] Enabling 180 degree rotation for sprite and crtc planes sagar.a.kamble
2014-02-07 13:45 ` [PATCH v4 01/11] drm: Move DRM_ROTATE bits out of omapdrm into drm_crtc.h sagar.a.kamble
2014-02-07 13:45 ` [PATCH v4 02/11] drm: Add support_bits parameter to drm_property_create_bitmask() sagar.a.kamble
2014-02-09 13:37 ` Rob Clark
2014-02-07 13:45 ` [PATCH v4 03/11] drm: Add drm_mode_create_rotation_property() sagar.a.kamble
2014-02-07 13:45 ` [PATCH v4 04/11] drm/omap: Switch omapdrm over to drm_mode_create_rotation_property() sagar.a.kamble
2014-02-09 13:34 ` Rob Clark
2014-02-07 13:45 ` [PATCH v4 05/11] drm: Add drm_rect rotation functions sagar.a.kamble
2014-02-07 13:45 ` [PATCH v4 06/11] drm: Add drm_rotation_simplify() sagar.a.kamble
2014-02-07 13:45 ` [PATCH v4 07/11] drm/i915: Add 180 degree sprite rotation support sagar.a.kamble
2014-02-07 13:45 ` [PATCH v4 08/11] drm/i915: Make intel_plane_restore() return an error sagar.a.kamble
2014-02-07 13:45 ` [PATCH v4 09/11] drm/i915: Add rotation property for sprites sagar.a.kamble
2014-02-07 13:45 ` [PATCH v4 10/11] drm/i915: Add 180 degree primary plane rotation support sagar.a.kamble
2014-02-07 13:45 ` [PATCH v4 11/11] drm/i915: Calling rotate and inverse rotate transformations after clipping sagar.a.kamble
2014-02-07 15:04 ` [PATCH v4 00/11] Enabling 180 degree rotation for sprite and crtc planes Daniel Vetter
2014-02-10 10:41 ` One Thousand Gnomes
2014-02-10 13:52 ` Ville Syrjälä
2014-02-10 14:14 ` One Thousand Gnomes
2014-02-10 14:29 ` Ville Syrjälä [this message]
2014-02-10 17:31 ` Daniel Vetter
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