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authorImre Deak <imre.deak@intel.com>2020-06-10 01:06:16 +0300
committerJoonas Lahtinen <joonas.lahtinen@linux.intel.com>2020-06-16 11:34:24 +0300
commit898e4e57adaeeefcfcf23f5d83360e513b69172f (patch)
treeca20283fe0c8f8c37a71c2399d890f94fd14a01c /drivers/power
parent8ab3a3812aa90e488813e719308ffd807b865624 (diff)
downloadlinux-898e4e57adaeeefcfcf23f5d83360e513b69172f.tar.bz2
drm/i915/icl: Disable DIP on MST ports with the transcoder clock still on
According to BSpec the Data Island Packet should be disabled after disabling the transcoder, but before the transcoder clock select is set to none. On an ICL RVP, daisy-chained MST config not following this leads to a hang with the following MCE when disabling the output: [ 870.948739] mce: [Hardware Error]: CPU 0: Machine Check Exception: 5 Bank 6: ba00000011000402 [ 871.019212] mce: [Hardware Error]: RIP !INEXACT! 10:<ffffffff81aca652> {poll_idle+0x92/0xb0} [ 871.019212] mce: [Hardware Error]: TSC 135a261fe61 [ 871.019212] mce: [Hardware Error]: PROCESSOR 0:706e5 TIME 1591739604 SOCKET 0 APIC 0 microcode 20 [ 871.019212] mce: [Hardware Error]: Run the above through 'mcelog --ascii' [ 871.019212] mce: [Hardware Error]: Machine check: Processor context corrupt [ 871.019212] Kernel panic - not syncing: Fatal machine check [ 871.019212] Kernel Offset: disabled Bspec: 4287 Fixes: fa37a213275c ("drm/i915: Stop sending DP SDPs on ddi disable") Cc: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com> Cc: Uma Shankar <uma.shankar@intel.com> Signed-off-by: Imre Deak <imre.deak@intel.com> Reviewed-by: Uma Shankar <uma.shankar@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200609220616.6015-1-imre.deak@intel.com (cherry picked from commit c980216dd224c52b5c70172753c209b653d84958) Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
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