drm/amd/display: Increase DPCD read retries

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commit 8612badc33 upstream.

[Why]
Empirical measurement of some monitors that fail to read EDID while
booting shows that the number of retries with a 30ms delay between
tries is as high as 16.

[How]
Increase number of retries to 20.

Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4672
Reviewed-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Mario Limonciello (AMD) <superm1@kernel.org>
Signed-off-by: Ivan Lipski <ivan.lipski@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit ad1c59ad7c)
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Mario Limonciello (AMD) 2025-11-03 12:11:31 -06:00 • committed by Greg Kroah-Hartman

parent 806f54a759

commit cd145ed8c5

1 changed files with 1 additions and 1 deletions

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

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