Commit a85d4bcb authored by Ben Widawsky's avatar Ben Widawsky Committed by Daniel Vetter
Browse files

drm/i915: rc6 residency (fix the fix)

Chris' fix for my 32b breakage was incorrect. do_div returns a
remainder. Go back to a divide macro which is more 32b friendly.

Tested on x86-64.

This has only been compile tested on 32b systems.


Cc: Chris Wilson <>
Sincere-apologies: Chris Wilson <>
Signed-off-by: default avatarBen Widawsky <>
[danvet: fixup 32bit compile-fail.]
Signed-Off-by: default avatarDaniel Vetter <>
parent 3801a7fd
......@@ -39,8 +39,8 @@ static u32 calc_residency(struct drm_device *dev, const u32 reg)
if (!intel_enable_rc6(dev))
return 0;
raw_time = I915_READ(reg) * 128ULL + 500;
return do_div(raw_time, 100000);
raw_time = I915_READ(reg) * 128ULL;
return DIV_ROUND_UP_ULL(raw_time, 100000);
static ssize_t
Supports Markdown
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment