On Fri, 5 Jul 2013 19:21:38 +0300 ville.syrjala at linux.intel.com wrote: > From: Ville Syrj?l? <ville.syrjala at linux.intel.com> > > I just got confirmation that we're using some old values for the PLL > LPF coefficients for DP RBR/HDMI/DAC on VLV. The > VLV2A0_DP_eDP_HDMI_DPIO_driver_vbios_notes_9 document lists both values > by mistake, and apparently we had picked the wrong one. Change the > coefficients to the recommended values. > > Changing the value doesn't appear to destabilize the VGA output picture > even with my sensitive HP ZR24w display. Also HDMI output to my TV still > works fine. > > Signed-off-by: Ville Syrj?l? <ville.syrjala at linux.intel.com> > --- > drivers/gpu/drm/i915/intel_display.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c > index fc2af13..b423432 100644 > --- a/drivers/gpu/drm/i915/intel_display.c > +++ b/drivers/gpu/drm/i915/intel_display.c > @@ -4448,7 +4448,7 @@ static void vlv_update_pll(struct intel_crtc *crtc) > intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_ANALOG) || > intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_HDMI)) > vlv_dpio_write(dev_priv, DPIO_LPF_COEFF(pipe), > - 0x005f0021); > + 0x009f0003); > else > vlv_dpio_write(dev_priv, DPIO_LPF_COEFF(pipe), > 0x00d0000f); Reviewed-by: Jesse Barnes <jbarnes at virtuousgeek.org> -- Jesse Barnes, Intel Open Source Technology Center
