On Fri, 2016-05-13 at 23:41 +0300, ville.syrj...@linux.intel.com wrote:
> From: Ville Syrjälä <ville.syrj...@linux.intel.com>
>
> commit 4e5ca60fd35a ("drm/i915: Use ilk_max_pixel_rate() for BXT cdclk
> calculation")
> tried to change BXT to use ilk_max_pixel_rate() to compute the
> pipe pixel rate. I failed to notice that there was another place
> in the state readout code that needs the same treatment. So let's
> change that one too.
>
> Should probably just change things to always compuyte the pipe pixel
> rates, instead of just doing on platforms that can change cdclk
> dynamically. But for now let's just move BXT fully over to the
> side that uses ilk_pipe_pixel_rate().
>
> Cc: Jani Nikula <jani.nik...@intel.com>
> Fixes: 4e5ca60fd35a ("drm/i915: Use ilk_max_pixel_rate() for BXT cdclk
> calculation")
> Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
Reviewed-by: Imre Deak <imre.d...@intel.com>
Btw, there is also skl_pipe_pixel_rate() that needs the same change.
> ---
> drivers/gpu/drm/i915/intel_display.c | 14 ++++++--------
> 1 file changed, 6 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_display.c
> b/drivers/gpu/drm/i915/intel_display.c
> index c5f0a6f30879..cc9a8b42fbc6 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -15748,18 +15748,16 @@ static void intel_modeset_readout_hw_state(struct
> drm_device *dev)
> if (crtc_state->base.active) {
> dev_priv->active_crtcs |= 1 << crtc->pipe;
>
> - if (IS_BROADWELL(dev_priv)) {
> + if (IS_BROXTON(dev_priv) || IS_BROADWELL(dev_priv))
> pixclk = ilk_pipe_pixel_rate(crtc_state);
> -
> - /* pixel rate mustn't exceed 95% of cdclk with
> IPS on BDW */
> - if (crtc_state->ips_enabled)
> - pixclk = DIV_ROUND_UP(pixclk * 100, 95);
> - } else if (IS_VALLEYVIEW(dev_priv) ||
> - IS_CHERRYVIEW(dev_priv) ||
> - IS_BROXTON(dev_priv))
> + else if (IS_VALLEYVIEW(dev_priv) ||
> IS_CHERRYVIEW(dev_priv))
> pixclk =
> crtc_state->base.adjusted_mode.crtc_clock;
> else
> WARN_ON(dev_priv->display.modeset_calc_cdclk);
> +
> + /* pixel rate mustn't exceed 95% of cdclk with IPS on
> BDW */
> + if (IS_BROADWELL(dev_priv) && crtc_state->ips_enabled)
> + pixclk = DIV_ROUND_UP(pixclk * 100, 95);
> }
>
> dev_priv->min_pixclk[crtc->pipe] = pixclk;
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