On ke, 2016-02-17 at 21:41 +0200, ville.syrj...@linux.intel.com wrote:
> From: Ville Syrjälä <ville.syrj...@linux.intel.com>
>
> Instead of assuming we've correctly set up SPLL to run at 270Mhz for
> FDI, let's use the port_clock from pipe_config which should be what
> we want. This would catch problems if someone misconfigures SPLL for
> whatever reason.
>
> Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
Reviewed-by: Imre Deak <imre.d...@intel.com>
> ---
> drivers/gpu/drm/i915/intel_display.c | 17 ++++++++++-------
> 1 file changed, 10 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_display.c
> b/drivers/gpu/drm/i915/intel_display.c
> index 99001e117517..a3c959cd8b3b 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -224,12 +224,15 @@ static void intel_update_czclk(struct
> drm_i915_private *dev_priv)
> }
>
> static inline u32 /* units of 100MHz */
> -intel_fdi_link_freq(struct drm_i915_private *dev_priv)
> +intel_fdi_link_freq(struct drm_i915_private *dev_priv,
> + const struct intel_crtc_state *pipe_config)
> {
> - if (IS_GEN5(dev_priv))
> - return (I915_READ(FDI_PLL_BIOS_0) &
> FDI_PLL_FB_CLOCK_MASK) + 2;
> + if (HAS_DDI(dev_priv))
> + return pipe_config->port_clock; /* SPLL */
> + else if (IS_GEN5(dev_priv))
> + return ((I915_READ(FDI_PLL_BIOS_0) &
> FDI_PLL_FB_CLOCK_MASK) + 2) * 10000;
> else
> - return 27;
> + return 270000;
> }
>
> static const intel_limit_t intel_limits_i8xx_dac = {
> @@ -6588,7 +6591,7 @@ retry:
> * Hence the bw of each lane in terms of the mode signal
> * is:
> */
> - link_bw = intel_fdi_link_freq(to_i915(dev)) *
> MHz(100)/KHz(1)/10;
> + link_bw = intel_fdi_link_freq(to_i915(dev), pipe_config);
>
> fdi_dotclock = adjusted_mode->crtc_clock;
>
> @@ -10774,7 +10777,7 @@ static void ironlake_pch_clock_get(struct
> intel_crtc *crtc,
> * Calculate one based on the FDI configuration.
> */
> pipe_config->base.adjusted_mode.crtc_clock =
> - intel_dotclock_calculate(intel_fdi_link_freq(dev_pri
> v) * 10000,
> + intel_dotclock_calculate(intel_fdi_link_freq(dev_pri
> v, pipe_config),
> &pipe_config->fdi_m_n);
> }
>
> @@ -12789,7 +12792,7 @@ static void
> intel_pipe_config_sanity_check(struct drm_i915_private *dev_priv,
> const struct
> intel_crtc_state *pipe_config)
> {
> if (pipe_config->has_pch_encoder) {
> - int fdi_dotclock =
> intel_dotclock_calculate(intel_fdi_link_freq(dev_priv) * 10000,
> + int fdi_dotclock =
> intel_dotclock_calculate(intel_fdi_link_freq(dev_priv, pipe_config),
> &pipe_co
> nfig->fdi_m_n);
> int dotclock = pipe_config-
> >base.adjusted_mode.crtc_clock;
>
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