From 49078f7d108f132582e5af46304c317b55f83948 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Sat, 4 Dec 2010 07:45:57 +0000 Subject: [PATCH] drm/i915: Factor in pixel-repeat in FDI M/N calculation Fixes the modesetting on the secondary panel of the Libretto W100 and presumably many more Ironlake laptops with SDVO LVDS displays. Reported-and-tested-by: Matthew Willoughby Signed-off-by: Chris Wilson Cc: stable@kernel.org --- drivers/gpu/drm/i915/intel_display.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index fac118b2df7..d9b7092439e 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -3710,6 +3710,7 @@ static int intel_crtc_mode_set(struct drm_crtc *crtc, /* FDI link */ if (HAS_PCH_SPLIT(dev)) { + int pixel_multiplier = intel_mode_get_pixel_multiplier(adjusted_mode); int lane = 0, link_bw, bpp; /* CPU eDP doesn't require FDI link, so just set DP M/N according to current link config */ @@ -3793,6 +3794,8 @@ static int intel_crtc_mode_set(struct drm_crtc *crtc, intel_crtc->fdi_lanes = lane; + if (pixel_multiplier > 1) + link_bw *= pixel_multiplier; ironlake_compute_m_n(bpp, lane, target_clock, link_bw, &m_n); } -- 2.41.0