[Intel-gfx] [PATCH v2] drm/i915: restore backlight precision when converting from opregion

Chris Wilson chris at chris-wilson.co.uk
Sun May 4 03:41:09 PDT 2014

On Sun, May 04, 2014 at 03:31:01PM +0800, Aaron Lu wrote:
> On 05/04/2014 03:22 PM, Chris Wilson wrote:
> > Also this still has the same rounding error as before.
> I didn't get this, care to explain?

The calculation you use, truncates, rather than say round to nearest,
would is the same discrepancy in your changelog.

Chris Wilson, Intel Open Source Technology Centre

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