[Bug 59841] [IVB cpu eDP] panel is broken due to 657445fe86 (eDP bpp clamping)

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=59841

--- Comment #70 from jkp <jkp at iki.fi> ---
Tried this suggested patch from comment 15, doesn't help on the TX300.


diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 24a44ed..3ad6bef 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -102,7 +102,7 @@ intel_dp_max_link_bw(struct intel_dp *intel_dp)
 static int
 intel_dp_link_required(int pixel_clock, int bpp)
 {
-       return (pixel_clock * bpp + 9) / 10;
+       return (pixel_clock * bpp + 9) / 10 * 40 / 39;
 }

 static int

which would ensure that there was always 2.5% overprivisioning in the link.

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