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drm/i915: Set lvds dual channel according to register from vbios

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Vbios will set lvds register correctly based on
current algorithm for lingle/dual Channel LVDS when
system boot, so we can accept this configuration
directly, regardless of LVDS enable status.

It fixed freedesktop.org bug #22262

Signed-off-by: Florian Mickler <florian@mickler.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Florian Mickler 2009-07-13 18:40:32 +08:00 committed by Eric Anholt
parent 7638d5322b
commit 832cc28d5b
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/i915/intel_display.c
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@ -645,7 +645,7 @@ intel_find_best_PLL(const intel_limit_t *limit, struct drm_crtc *crtc,
int err = target;
if (IS_I9XX(dev) && intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS) &&
(I915_READ(LVDS) & LVDS_PORT_EN) != 0) {
(I915_READ(LVDS)) != 0) {
/*
* For LVDS, if the panel is on, just rely on its current
* settings for dual-channel. We haven't figured out how to