<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [BYT][VLV] No picture on DSI display after DRM loads on Teclast X80H tablet" href="https://bugs.freedesktop.org/show_bug.cgi?id=96996#c5">Comment # 5</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [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=127200" name="attach_127200" title="dmesg of 4.6.7 with no fastboot parameter, DSI screen goes blank">attachment 127200</a> <a href="attachment.cgi?id=127200&action=edit" title="dmesg of 4.6.7 with no fastboot parameter, DSI screen goes blank">[details]</a> dmesg of 4.6.7 with no fastboot parameter, DSI screen goes blank If I understand correctly, with fastboot=1 (fastset) the driver doesn't try to initialize the dsi display, it just takes it over, and it works. Without the fastboot, it disables the dsi screen, tries to initialize it again, and this is where something goes wrong: [ 9.060698] [drm:vlv_dsi_device_ready] [ 9.097539] [drm:generic_exec_sequence] Starting MIPI sequence 1 - MIPI_SEQ_ASSERT_RESET [ 9.129546] [drm:generic_exec_sequence] Starting MIPI sequence 2 - MIPI_SEQ_INIT_OTP [ 9.237341] [drm:intel_dsi_enable] [ 9.369496] [drm:generic_exec_sequence] MIPI sequence 3 - MIPI_SEQ_DISPLAY_ON not available [ 9.373597] [drm:vlv_pipe_set_fifo_size] Pipe A FIFO split 511 / 511 / 511 [ 9.373616] [drm:vlv_update_wm] Setting FIFO watermarks - A: plane=461, cursor=63, sprite0=0, sprite1=0, SR: plane=0, cursor=0 level=0 cxsr=0 [ 9.373621] [drm:intel_enable_pipe] enabling pipe A [ 9.377542] [drm:intel_dsi_enable_nop] [ 9.429535] ------------[ cut here ]------------ [ 9.429763] WARNING: CPU: 3 PID: 59 at drivers/gpu/drm/i915/intel_display.c:13472 intel_atomic_commit+0x13bb/0x1450 [i915] [ 9.429770] WARN_ON(!lret)</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>