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drm/amd/display: check if dml21_add_phantom_plane() is successful

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Verify that the phantom plane was allocated to avoid a later
segfault.

Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4970
Fixes: 70839da636 ("drm/amd/display: Add new DCN401 sources")
Reviewed-by: Dillon Varone <dillon.varone@amd.com>
Signed-off-by: Fangzhi Zuo <jerry.zuo@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 5adb54abe5)
Cc: stable@vger.kernel.org
This commit is contained in:
Alex Deucher 2026-02-16 09:32:53 -05:00
parent f327e389c0
commit 000acb4ce7
1 changed files with 7 additions and 8 deletions
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15
drivers/gpu/drm/amd/display/dc/dml2_0/dml21/dml21_utils.c
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@ -359,14 +359,13 @@ void dml21_handle_phantom_streams_planes(const struct dc *dc, struct dc_state *c
main_plane = main_stream_status->plane_states[dc_plane_index];
/* create phantom planes for subvp enabled plane */
dml21_add_phantom_plane(dml_ctx,
dc,
context,
phantom_stream,
main_plane,
&dml_ctx->v21.mode_programming.programming->plane_programming[dml_plane_index]);
phantoms_added = true;
if (dml21_add_phantom_plane(dml_ctx,
dc,
context,
phantom_stream,
main_plane,
&dml_ctx->v21.mode_programming.programming->plane_programming[dml_plane_index]))
phantoms_added = true;
}
}
}