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On VLV/CHV enabling sprite0 when sprite1 has already been enabled may lead to an underrun. This only happens when sprite0 FIFO size is zero prior to enabling it. Hence an effective workaround is to always allocate at least one cacheline for sprite0 when sprite1 is active. I've not observed this sort of failure during any other type of plane enable/disable sequence. v2: s/noninverted/raw/ for consistency with other platforms Testcase: igt/kms_plane_blinker Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20170302171508.1666-14-ville.syrjala@linux.intel.com |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.