<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW --- - Monitor not recognizing RGB limited/full color range" href="https://bugs.freedesktop.org/show_bug.cgi?id=71769#c9">Comment # 9</a> on <a class="bz_bug_link bz_status_NEW " title="NEW --- - Monitor not recognizing RGB limited/full color range" href="https://bugs.freedesktop.org/show_bug.cgi?id=71769">bug 71769</a> from <a class="email" href="mailto:ville.syrjala@linux.intel.com" title="Ville Syrjala <ville.syrjala@linux.intel.com>"> Ville Syrjala</a> <pre>(In reply to <a href="show_bug.cgi?id=71769#c8">comment #8</a>) > If I'm reading this right, the infoframes are working properly, but colors > are scaled too much with xrandr --output HDMI1 --set "Broadcast RGB" > "Limited 16:235" Hmm. I tried to compare my IVB vs. HSW a bit, and it does look like HSW blacks are more grayish in limited range mode. But I double checked the code and we're computing the coefficients correctly as far as the spec is concerned. I need to ask our display hardware guy whether the spec is wrong, or if I just misunderstood it. I experimented a bit and simply halving the pipe CSC post coeffs seems to make the output look better. Something like this (for pipe A, add 0x100 to register offsets for pipe B, 0x200 for pipe C) intel_reg_write 0x49040 0x101 intel_reg_write 0x49048 0x101 intel_reg_write 0x49044 0x101 intel_reg_write 0x49028 0x0</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>