On Wed, Apr 08, 2015 at 07:18:06PM +0800, Tom Yan wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=94921 > > As mentioned in the above bug report, switching output color range > "Automatically" according to current mode does not make sense in > computer use case. Current code seems correct to me after re-reading CEA-861-E again. However can we do better? Maybe! From the spec: "The QS (AVI Q support) bit of byte 3 allows a display to declare that it supports the reception of either type of quantization range for any video format, under the direction of InfoFrame Q data (see Section 6.4 for information concerning bits Q1 and Q0). This allows a source to override the default quantization range for any video format. If the sink declares a selectable RGB Quantization Range (QS=1) then it shall expect limited range pixel values if it receives Q=1 and it shall expect full range pixel values if it receives Q=2 (see section 6.4). For other values of Q, the sink shall expect pixel values with the default range for the transmitted video format." So, for sinks that support it, we could default to sending the full range picture and overriding the quantization bit in the AVI infoframe. You could you try to run edid-decode [1] on your sink EDID to check if it supports overriding the quantization level (I added decoding the VCDB a while back). Ville, what do you think? -- Damien [1] http://cgit.freedesktop.org/xorg/app/edid-decode _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
