drm/msm/dpu: change _dpu_plane_calc_bw() to use u64 to avoid overflow
_dpu_plane_calc_bw() uses integer variables to calculate the bandwidth used during plane bandwidth calculations. However for high resolution displays this overflows easily and leads to below errors [dpu error]crtc83 failed performance check -7 Promote the intermediate variables to u64 to avoid overflow. changes in v2: - change to u64 where actually needed in the math Fixes: c33b7c03 ("drm/msm/dpu: add support for clk and bw scaling for display") Reviewed-by:Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Reported-by:
Nia Espera <nespera@igalia.com> Closes: https://gitlab.freedesktop.org/drm/msm/-/issues/32 Tested-by:
Nia Espera <nespera@igalia.com> Patchwork: https://patchwork.freedesktop.org/patch/556288/ Link: https://lore.kernel.org/r/20230908012616.20654-1-quic_abhinavk@quicinc.com Signed-off-by:
Abhinav Kumar <quic_abhinavk@quicinc.com>
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