diff options
| -rw-r--r-- | drivers/gpu/drm/i915/intel_pm.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 8358d73ae46..856c094a35e 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -2131,6 +2131,9 @@ static uint32_t ilk_wm_method1(uint32_t pixel_rate, uint8_t bytes_per_pixel, { uint64_t ret; + if (WARN(latency == 0, "Latency value missing\n")) + return UINT_MAX; + ret = (uint64_t) pixel_rate * bytes_per_pixel * latency; ret = DIV_ROUND_UP_ULL(ret, 64 * 10000) + 2; @@ -2143,6 +2146,9 @@ static uint32_t ilk_wm_method2(uint32_t pixel_rate, uint32_t pipe_htotal, { uint32_t ret; + if (WARN(latency == 0, "Latency value missing\n")) + return UINT_MAX; + ret = (latency * pixel_rate) / (pipe_htotal * 10000); ret = (ret + 1) * horiz_pixels * bytes_per_pixel; ret = DIV_ROUND_UP(ret, 64) + 2; |