From: Ville Syrjälä <ville.syrj...@linux.intel.com>
Dotclocks can reach ~1GHz these days, so intel_usecs_to_scanlines(),
with its 32bit maths, is currently limited to a few milliseconds.
I want bigger numbers in DSB selftests, so switch over to 64bit
maths.
Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
---
drivers/gpu/drm/i915/display/intel_crtc.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_crtc.c
b/drivers/gpu/drm/i915/display/intel_crtc.c
index ca6dc1dc56c8..17edd6099287 100644
--- a/drivers/gpu/drm/i915/display/intel_crtc.c
+++ b/drivers/gpu/drm/i915/display/intel_crtc.c
@@ -454,8 +454,8 @@ int intel_usecs_to_scanlines(const struct drm_display_mode
*adjusted_mode,
if (!adjusted_mode->crtc_htotal)
return 1;
- return DIV_ROUND_UP(usecs * adjusted_mode->crtc_clock,
- 1000 * adjusted_mode->crtc_htotal);
+ return DIV_ROUND_UP_ULL(mul_u32_u32(usecs, adjusted_mode->crtc_clock),
+ 1000 * adjusted_mode->crtc_htotal);
}
/**
--
2.44.1
