50faf7a194
We're currently forgetting to set the PLANE_SURF_DECRYPT flag in the async flip path. So if the hardware were to latch that bit despite this being an async flip we'd start scanning out garbage. And if it doesn't latch it then I guess we'd just end up with a weird register value that doesn't actually match the hardware state, which isn't great for anyone staring at register dumps. Similarly the async flip path also forgets to call skl_surf_address() which means the DPT address space to GGTT address space downshift is not being applied to the offset. Which means we are pointing PLANE_SURF at some random location in GGTT instead of the correct DPT page. So let's fix two birds with one stone and extract the PLANE_SURF calculation from skl_program_plane() into a small helper and use it in the async flip path as well. Cc: Anshuman Gupta <anshuman.gupta@intel.com> Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Cc: Juston Li <juston.li@intel.com> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Cc: Uma Shankar <uma.shankar@intel.com> Cc: Karthik B S <karthik.b.s@intel.com> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20211018115030.3547-3-ville.syrjala@linux.intel.com Reviewed-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.