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Ville Syrjälä
55bc60db59
Add a new "Automatic" mode to the "Broadcast RGB" range property. When selected the driver automagically selects between full range and limited range output. Based on CEA-861 [1] guidelines, limited range output is selected if the mode is a CEA mode, except 640x480. Otherwise full range output is used. Additionally DVI monitors should most likely default to full range always. As per DP1.2a [2] DisplayPort should always use full range for 18bpp, and otherwise will follow CEA-861 rules. NOTE: The default value for the property will now be "Automatic" so some people may be affected in case they're relying on the current full range default. [1] CEA-861-E - 5.1 Default Encoding Parameters [2] VESA DisplayPort Ver.1.2a - 5.1.1.1 Video Colorimetry v2: Use has_hdmi_sink to check if a HDMI monitor is present v3: Add information about relevant spec chapters Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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* For the very latest on DRI development, please see: *
* http://dri.freedesktop.org/ *
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The Direct Rendering Manager (drm) is a device-independent kernel-level
device driver that provides support for the XFree86 Direct Rendering
Infrastructure (DRI).
The DRM supports the Direct Rendering Infrastructure (DRI) in four major
ways:
1. The DRM provides synchronized access to the graphics hardware via
the use of an optimized two-tiered lock.
2. The DRM enforces the DRI security policy for access to the graphics
hardware by only allowing authenticated X11 clients access to
restricted regions of memory.
3. The DRM provides a generic DMA engine, complete with multiple
queues and the ability to detect the need for an OpenGL context
switch.
4. The DRM is extensible via the use of small device-specific modules
that rely extensively on the API exported by the DRM module.
Documentation on the DRI is available from:
http://dri.freedesktop.org/wiki/Documentation
http://sourceforge.net/project/showfiles.php?group_id=387
http://dri.sourceforge.net/doc/
For specific information about kernel-level support, see:
The Direct Rendering Manager, Kernel Support for the Direct Rendering
Infrastructure
http://dri.sourceforge.net/doc/drm_low_level.html
Hardware Locking for the Direct Rendering Infrastructure
http://dri.sourceforge.net/doc/hardware_locking_low_level.html
A Security Analysis of the Direct Rendering Infrastructure
http://dri.sourceforge.net/doc/security_low_level.html