<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - [BSW Bisected]System fails to find eDP monitor." href="https://bugs.freedesktop.org/show_bug.cgi?id=84265#c12">Comment # 12</a> on <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - [BSW Bisected]System fails to find eDP monitor." href="https://bugs.freedesktop.org/show_bug.cgi?id=84265">bug 84265</a> from <a class="email" href="mailto:wendy.wang@intel.com" title="wendy.wang@intel.com">wendy.wang@intel.com</a> <pre>(In reply to wendy.wang from <a href="show_bug.cgi?id=84265#c11">comment #11</a>) > (In reply to Ville Syrjala from <a href="show_bug.cgi?id=84265#c10">comment #10</a>) > > Created <a href="attachment.cgi?id=107624" name="attach_107624" title="[PATCH] drm/i915: Don't trust the DP_DETECT bit for eDP ports on CHV">attachment 107624</a> <a href="attachment.cgi?id=107624&action=edit" title="[PATCH] drm/i915: Don't trust the DP_DETECT bit for eDP ports on CHV">[details]</a> <a href='page.cgi?id=splinter.html&bug=84265&attachment=107624'>[review]</a> [review] [review] > > [PATCH] drm/i915: Don't trust the DP_DETECT bit for eDP ports on CHV > > > > Ok, so it seems the DDC pins are muxed in such a way on these boards that > > there's no DDC pins for port C, and thus no strap for the port detect. > > > > I have no idea how it manages to work for some people (including me), but > > maybe the straps are sampled before the pin muxing is changed or something. > > Although even that is a very weak theory since the default muxing seems to > > be such that > > there's no DDC for port C. So I can't actually explain how the detect bit > > ends up as 1 on my machine. > > > > Anyway this patch will check the VBT to see if there should be an eDP port > > there even if the strap said otherwise. We anyway rely on the VBT to tell DP > > and eDP apart so this doesn't actually increase our dependence on the VBT. > > This patch can fix the edp not light problem with R10 rework on BSW. Pls > help upstream the patch, thanks. > > Detail configuration: > BSW RVP FAB2 with R9,R10,R11 rework > B1 CPU silicon > KSC is 1.02 > BIOS: V36 > RAM: 2x 2GB > OS: Ubuntu 14.04 x64 Patch apply against latest drm-intel-nightly branch kernel.</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>