[Bug 107476] 24bpp (True Color) limited RGB fix for Intel Graphics over DisplayPort

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107476

--- Comment #1 from Chris Wilson <chris at chris-wilson.co.uk> ---
commit 55bc60db5988c8366751d3d04dd690698a53412c
Author: Ville Syrjälä <ville.syrjala at linux.intel.com>
Date:   Thu Jan 17 16:31:29 2013 +0200

    drm/i915: Add "Automatic" mode for the "Broadcast RGB" property

    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 at intel.com>
    Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
    Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>

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