drm/amd/display: Fix LSDMA divide by zero

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[WHY]
element_size_to_bytes_per_pixel() handled only element sizes 0 to 4 and
returned 0 for every other value, and an unexpected element size caused
a divide by zero.

[HOW]
Derive the size as 1 << element_size, which matches the existing
encoding, and fall back to 1 for values of 8 or more to keep the result
nonzero.

Reviewed-by: Austin Zheng <austin.zheng@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: George Zhang <george.zhang@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Alex Hung 2026-09-11 10:29:02 -06:00 • committed by Alex Deucher

parent 708d3e7aee

commit 92dd8d3edf

1 changed files with 1 additions and 21 deletions

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drivers/gpu/drm/amd/display/dc/dml2_0/dml21/src/dml2_standalone_libraries/alternate_pstate_shared_lib.c

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