From 2377b741abec485449d145e5065dd2b7dd64226f Mon Sep 17 00:00:00 2001 From: Jesse Barnes Date: Wed, 7 Jul 2010 14:06:43 -0700 Subject: [PATCH] drm/i915: fix FDI frequency check Since mode->clock is in kHz we should be checking against 2700000 instead of just 27000. This patch gets my x201s working again (well working as well as it ever was anyway). When looking for this I also noticed we set link_bw to 270000, but the calculation is different. Does it also need to use kHz or we using 10kHz internally? Signed-off-by: Jesse Barnes Signed-off-by: Eric Anholt --- drivers/gpu/drm/i915/intel_display.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 81179fb5150e..7e57eaba5e25 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -323,6 +323,9 @@ struct intel_limit { #define IRONLAKE_DP_P1_MIN 1 #define IRONLAKE_DP_P1_MAX 2 +/* FDI */ +#define IRONLAKE_FDI_FREQ 2700000 /* in kHz for mode->clock */ + static bool intel_find_best_PLL(const intel_limit_t *limit, struct drm_crtc *crtc, int target, int refclk, intel_clock_t *best_clock); @@ -2421,8 +2424,8 @@ static bool intel_crtc_mode_fixup(struct drm_crtc *crtc, struct drm_device *dev = crtc->dev; if (HAS_PCH_SPLIT(dev)) { /* FDI link clock is fixed at 2.7G */ - if (mode->clock * 3 > 27000 * 4) - return MODE_CLOCK_HIGH; + if (mode->clock * 3 > IRONLAKE_FDI_FREQ * 4) + return false; } drm_mode_set_crtcinfo(adjusted_mode, 0); -- 2.30.2