drm/amd/display: increase max link count and fix link->enc NULL pointer access

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commit bec947cbe9 upstream.

[why]
1.) dc->links[MAX_LINKS] array size smaller than actual requested.
max_connector + max_dpia + 4 virtual = 14.
increase from 12 to 14.

2.) hw_init() access null LINK_ENC for dpia non display_endpoint.

Cc: Mario Limonciello <mario.limonciello@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Meenakshikumar Somasundaram <meenakshikumar.somasundaram@amd.com>
Reviewed-by: Chris Park <chris.park@amd.com>
Signed-off-by: Charlene Liu <Charlene.Liu@amd.com>
Signed-off-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit d7f5a61e1b)
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Charlene Liu 2025-09-29 20:29:30 -04:00 • committed by Greg Kroah-Hartman

parent 6fc0a7c99e

commit f28092be4e

2 changed files with 10 additions and 1 deletions

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3

drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c

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8

drivers/gpu/drm/amd/display/dc/inc/hw/hw_shared.h

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