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    SubjectRe: [PATCH] drm/i915: Fix invalid backpanel values for GEN3 or older chips
    Date
    On Wed, 16 Nov 2011 18:14:55 +0100, Takashi Iwai <tiwai@suse.de> wrote:

    > While refactoring of backlight control code in commit [a95735569:
    > drm/i915: Refactor panel backlight controls], the handling of the bit
    > 0 of duty-cycle was gone except for pineview. This resulted in invalid
    > register values for old chips like 915GM. When the bit 0 is set, the
    > backlight is turned off suddenly.

    I'm looking at the mentioned patch and I don't see how that managed to
    correctly handle bit 0; is this the patch that managed to break this?

    --
    keith.packard@intel.com
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