[Intel-gfx] [PATCH] drm/i915: Haswell FBC supports up to 4096x4096

Daniel Vetter daniel at ffwll.ch
Fri May 24 01:41:22 CEST 2013

On Thu, May 23, 2013 at 11:30 PM, Paulo Zanoni <przanoni at gmail.com> wrote:
> From: Paulo Zanoni <paulo.r.zanoni at intel.com>
> But only the first 2048 lines will be compressed. No problem.
> With this I can finally see FBC on my 2560x1440 DP monitor, which
> gives me a boost on the PC7 residency.
> Signed-off-by: Paulo Zanoni <paulo.r.zanoni at intel.com>

After some extensive doc hunting I believe that cantiga and ilk+ have
a limit of 2048 lines by 4048 pixels wide (this is the fbc2 limit).
Original fbc (on gen2/3/crestline) has the limits currently in our
code. Can you please amend your patch to include this?
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch

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