drm/amd/display: Check for tg ops in dce110_set_avmute

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Some older DCE timing generators do not implement is_tg_enabled in
their ops table. Calling it unconditionally when waiting for AV mute
frames causes a NULL pointer dereference on Southern Islands dGPUs
when turning the display off over HDMI.

Check that tg and the required ops exist before waiting for frames.

Fixes: 414da24137 ("drm/amd/display: Add AV mute wait frames to dce110_set_avmute")
Closes: https://gitlab.freedesktop.org/drm/amd/-/work_items/5557
Tested-by: Viktor Jägersküpper <viktor_jaegerskuepper@freenet.de>
Signed-off-by: Ray Wu <ray.wu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Ray Wu 2026-08-05 09:47:17 +08:00 • committed by Alex Deucher

parent 336e0cd576

commit 2686a0c0aa

1 changed files with 4 additions and 1 deletions

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drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c

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