drm/amd/display: Validate hw_points_num before using it

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[WHAT]
hw_points_num is 0 before ogam LUT is programmed; however, function
"dwb3_program_ogam_pwl" assumes hw_points_num is always greater than 0,
i.e. substracting it by 1 as an array index.

[HOW]
Check hw_points_num is not equal to 0 before using it.

Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Alex Hung 2023-12-01 06:25:34 -07:00 • committed by Alex Deucher

parent c09919e6ea

commit 86ecd796a8

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drivers/gpu/drm/amd/display/dc/dcn30/dcn30_dwb_cm.c

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