[PATCH 0/1][SRU][Jammy][OEM-5.14] The display output on type-c hub doesn't work on ADL platform

AceLan Kao acelan.kao at canonical.com
Thu Jan 27 02:34:52 UTC 2022


From: "Chia-Lin Kao (AceLan)" <acelan.kao at canonical.com>

BugLink: https://bugs.launchpad.net/bugs/1959061

[Impact]
The display output(DP/HDMI) on the USB type-c hub doesn't work. No display
output device could be found after the monitor is plugged into the hub.

[Fix]
Intel provide a new patch to fix this issue on ADL platforms.

[Test]
Verified on ADL platform with different type-c hubs, the display output
works.

[Where problems could occur]
The TCSS_DDI_STATUS register is indexed by tc_port not by the FIA port
index. So, this patch is more like a fix and only affect ADL platforms.
And as the commit log describes, the value is wrong on TC#3/4 ports,
so it won't affect the origin working ports.

Imre Deak (1):
  UBUNTU: SAUCE: drm/i915/adlp: Fix TypeC PHY-ready status readout

 drivers/gpu/drm/i915/display/intel_tc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

-- 
2.25.1




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