drm/amd/display: Fix divide-by-zero in DPPCLK and DISPCLK calculation

[Why]
Certain use cases will pass in zero in the new_clocks parameter for all
clocks. This results in a divide-by-zero error when attempting to round
up the new clock.

When new_clocks are zero, no rounding is required, so we can skip it.

[How]
Guard the division calculation with a check to make sure clocks are not
zero.

Tested-by: Daniel Wheeler <[email protected]>
Acked-by: Rodrigo Siqueira <[email protected]>
Signed-off-by: George Shen <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

0 files changed, 0 insertions, 0 deletions