_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.
Fixes: c33b7c0389e1 ("drm/msm/dpu: add support for clk and bw scaling for display")
Closes: https://gitlab.freedesktop.org/drm/msm/-/issues/32
Signed-off-by: Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx>
---
drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
index ae970af1154f..c6193131beec 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
@@ -118,7 +118,7 @@ static u64 _dpu_plane_calc_bw(const struct dpu_mdss_cfg *catalog,
const struct drm_display_mode *mode,
struct dpu_sw_pipe_cfg *pipe_cfg)
{
- int src_width, src_height, dst_height, fps;
+ u64 src_width, src_height, dst_height, fps;
u64 plane_prefill_bw;
u64 plane_bw;
u32 hw_latency_lines;
--
2.40.1
