<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - HDMI port is not working on current KMS driver with VX900 platform" href="https://bugs.freedesktop.org/show_bug.cgi?id=94528#c3">Comment # 3</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - HDMI port is not working on current KMS driver with VX900 platform" href="https://bugs.freedesktop.org/show_bug.cgi?id=94528">bug 94528</a> from <a class="email" href="mailto:kevinbrace@gmx.com" title="Kevin Brace <kevinbrace@gmx.com>"> Kevin Brace</a> <pre>(In reply to HuangRan from <a href="show_bug.cgi?id=94528#c2">comment #2</a>) Hi Frank, > (In reply to Kevin Brace from <a href="show_bug.cgi?id=94528#c1">comment #1</a>) > > Hi Frank, > > > > Interesting that the DRM or DDX is recognizing the HDMI monitor. > > > > ________________________________________________________________ > > . . . > > > > [ 91.005] (II) CHROME(0): EDID for output DVI-0 > > [ 91.005] (II) CHROME(0): Output VGA-0 disconnected > > [ 91.005] (II) CHROME(0): Output HDMI-0 connected > > [ 91.005] (II) CHROME(0): Output DVI-0 disconnected > > [ 91.005] (II) CHROME(0): Using exact sizes for initial modes > > [ 91.005] (II) CHROME(0): Output HDMI-0 using initial mode 1920x1080 +0+0 > > . . . > > ________________________________________________________________ > > Yup, Kevin. I see that. And I found EDID information is probed out by the > driver. So we need see what happened that lead no display on the monitor. > > Thanks, > Frank The weird thing about VX900 chipset hardware programming documentation is that it contains register information for DisplayPort, but not HDMI. I do not know how James Simmons wrote the code, if the above assumption is true. That being said, VIA Technologies does have a quasi-open source 2D device driver code on their website for Chrome 9 family. <a href="http://download.viatech.com/en/support/driversSelect.jsp">http://download.viatech.com/en/support/driversSelect.jsp</a> Select "Linux (current)" and VX900 chipset. At least for the DRM module which supports KMS, it is open source. Check out via_chrome9_hdac_renew.c where it is apparently accessing the registers related to HDMI.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>