<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [dp] intel_dp.c:1554 WARN_ON(len <=8)" href="https://bugs.freedesktop.org/show_bug.cgi?id=103347#c15">Comment # 15</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [dp] intel_dp.c:1554 WARN_ON(len <=8)" href="https://bugs.freedesktop.org/show_bug.cgi?id=103347">bug 103347</a> from <a class="email" href="mailto:shashank.sharma@intel.com" title="shashank.sharma@intel.com <shashank.sharma@intel.com>"> shashank.sharma@intel.com</a> <pre>(In reply to F.Hartung from <a href="show_bug.cgi?id=103347#c12">comment #12</a>) > I'm pretty sure it uses a LSPCON since I updated the hdmi firmware with this > tool to 1.72 > (<a href="https://downloadcenter.intel.com/download/26609/NUCs-HDMI-2-0-Firmware">https://downloadcenter.intel.com/download/26609/NUCs-HDMI-2-0-Firmware</a>- > Update-Tool-for-Intel-NUC-Kit-NUC6CAY-and-NUC7i3BN?product=95069) > to solve audio issues. > > There is a whole thread about the problems of the Intel Apollo Lake platform > and others with quite a similar board (J4205-ITX) report they also updated > their hdmi firmware. > <a href="https://forum.kodi.tv/showthread.php?tid=270298&pid=2553256#pid2553256">https://forum.kodi.tv/showthread.php?tid=270298&pid=2553256#pid2553256</a> This is a different issue they are talking about, this is about getting HDR 10 bit output using HDMI 2.0 port (LSPCON), whereas this problem seems to be basic. > > The Apollo Lake boards use a "HDMI-2.0-LSPCon MegaChips MCDP2800", there is > a similar chip on my board so I'm pretty sure it is an internal DP port > mapped to the HDMI port. > > <a href="http://www.megachips.com/products/displayport/MCDP28x0">http://www.megachips.com/products/displayport/MCDP28x0</a> MCDP2800 is a DP to HDMI converter LSPCON device, which is on-board with many APL devices in a motherboard down mode. > > <a href="https://www.heise.de/imgs/18/2/2/5/8/6/6/2/MegaChips-MCDP2800">https://www.heise.de/imgs/18/2/2/5/8/6/6/2/MegaChips-MCDP2800</a>- > 903a5c8eddf6bffc-b4c059ea0025935c.jpeg > > <a href="https://www.heise.de/newsticker/meldung/Intel-Celeron-Gemini-Lake-mit-HDMI-2">https://www.heise.de/newsticker/meldung/Intel-Celeron-Gemini-Lake-mit-HDMI-2</a>- > 0-und-SGX-3801532.html > Geminilake is different from Apollolake, even though they belong to same GEN family, GLK has a native HDMI 2.0 controller, whereas APL takes help from LSPCON for HDMI 2.0 conversion. > I have a second TV of the same model and it's connected to my main HTPC with > an i3-6100 & GA-B150N Phoenix-WIFI board. This combination works quite fine, > also the logging of those messages started with kernel 4.15 so I guess it's > related to recent patches. > > So all in all I'm pretty sure it's using the same lspcon & I didn't use the > wrong system to gather information.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are on the CC list for the bug.</li> <li>You are the QA Contact for the bug.</li> <li>You are the assignee for the bug.</li> </ul> </body> </html>