<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - [BYT][VLV] No picture on DSI display after DRM loads on Teclast X80H tablet" href="https://bugs.freedesktop.org/show_bug.cgi?id=96996#c8">Comment # 8</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - [BYT][VLV] No picture on DSI display after DRM loads on Teclast X80H tablet" href="https://bugs.freedesktop.org/show_bug.cgi?id=96996">bug 96996</a> from <a class="email" href="mailto:laszlo.fiat@gmail.com" title="Laszlo Fiat <laszlo.fiat@gmail.com>"> Laszlo Fiat</a> <pre>Created <a href="attachment.cgi?id=128654" name="attach_128654" title="Dmesg of drm-tip 2016-12-22, no WARNING, but still blank screen">attachment 128654</a> <a href="attachment.cgi?id=128654&action=edit" title="Dmesg of drm-tip 2016-12-22, no WARNING, but still blank screen">[details]</a> Dmesg of drm-tip 2016-12-22, no WARNING, but still blank screen The patches make the WARNING go away, but the screen still stays blank after modeset. Just a wild guess: this may be a gpio issue like what Hans fixed with his patch [1] for CHT, but this is VLV. This tablet has a DollarCove pmic (AXP288), so this is not CrystalCove. The Android kernel code handled this pmic in intel_soc_pmic, while mainline has is in axp20x (in a really bad shape). Hans created some patches for it, but they are not in linux-next yet. This may, or may not be relevant for panel handling. [1]: <a href="https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/commit/drivers/gpu/drm/i915?id=22ca0d4991169b76e753d767a45f1105c356bbb8">https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/commit/drivers/gpu/drm/i915?id=22ca0d4991169b76e753d767a45f1105c356bbb8</a></pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> <li>You are on the CC list for the bug.</li> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>