drm/amd/display: Fix 128b132b link loss handling

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commit ed83fe2abc upstream.

[Why]
We don't check 128b132b-specific bits in LANE_ALIGN_STATUS_UPDATED DPCD
registers when parsing link loss status, which can cause us to miss a
link loss notification from some sinks.

[How]
Add a 128b132b-specific status bit check.

Cc: stable@vger.kernel.org # 6.3+
Reviewed-by: Wenjing Liu <wenjing.liu@amd.com>
Acked-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Ilya Bakoulin <ilya.bakoulin@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Ilya Bakoulin 2023-06-07 16:49:45 -04:00 • committed by Greg Kroah-Hartman

parent 6593bd908f

commit 8961ce852f

1 changed files with 9 additions and 2 deletions

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drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_irq_handler.c

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