On Mon, 19 Dec 2016, ville.syrj...@linux.intel.com wrote:
> From: Ville Syrjälä <ville.syrj...@linux.intel.com>
>
> Let's clean up the mess we have in the if ladder that assigns the
> .get_cdclk() hooks. The grouping of the platforms by the function
> results in a thing that's not really legible, so let's do it the
> other way around and order the if ladder by platform and duplicate
> whatever assignments we need.
>
> To further avoid confusion with the function names let's rename
> them to just fixed_<freq>_get_cdclk(). The other option would
> be to duplicate the functions entirely but it seems quite
> pointless to do that since each one just returns a fixed value.
>
> Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
> ---
> drivers/gpu/drm/i915/intel_display.c | 41
> +++++++++++++++++++++---------------
> 1 file changed, 24 insertions(+), 17 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_display.c
> b/drivers/gpu/drm/i915/intel_display.c
> index bbfef348783b..29f91e799272 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -7379,22 +7379,22 @@ static int valleyview_get_cdclk(struct
> drm_i915_private *dev_priv)
> CCK_DISPLAY_CLOCK_CONTROL);
> }
>
> -static int ilk_get_cdclk(struct drm_i915_private *dev_priv)
> +static int fixed_450mhz_get_cdclk(struct drm_i915_private *dev_priv)
> {
> return 450000;
> }
>
> -static int i945_get_cdclk(struct drm_i915_private *dev_priv)
> +static int fixed_400mhz_get_cdclk(struct drm_i915_private *dev_priv)
> {
> return 400000;
> }
>
> -static int i915_get_cdclk(struct drm_i915_private *dev_priv)
> +static int fixed_333mhz_get_cdclk(struct drm_i915_private *dev_priv)
> {
> return 333333;
> }
>
> -static int i9xx_misc_get_cdclk(struct drm_i915_private *dev_priv)
> +static int fixed_200mhz_get_cdclk(struct drm_i915_private *dev_priv)
> {
> return 200000;
> }
> @@ -7444,7 +7444,7 @@ static int i915gm_get_cdclk(struct drm_i915_private
> *dev_priv)
> }
> }
>
> -static int i865_get_cdclk(struct drm_i915_private *dev_priv)
> +static int fixed_266mhz_get_cdclk(struct drm_i915_private *dev_priv)
> {
> return 266667;
> }
> @@ -7487,7 +7487,7 @@ static int i85x_get_cdclk(struct drm_i915_private
> *dev_priv)
> return 0;
> }
>
> -static int i830_get_cdclk(struct drm_i915_private *dev_priv)
> +static int fixed_133mhz_get_cdclk(struct drm_i915_private *dev_priv)
> {
> return 133333;
> }
> @@ -16098,32 +16098,39 @@ void intel_init_display_hooks(struct
> drm_i915_private *dev_priv)
> dev_priv->display.get_cdclk = haswell_get_cdclk;
> else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
> dev_priv->display.get_cdclk = valleyview_get_cdclk;
> + else if (IS_GEN6(dev_priv) || IS_IVYBRIDGE(dev_priv))
> + dev_priv->display.get_cdclk = fixed_400mhz_get_cdclk;
> else if (IS_GEN5(dev_priv))
> - dev_priv->display.get_cdclk = ilk_get_cdclk;
> - else if (IS_I945G(dev_priv) || IS_I965G(dev_priv) ||
> - IS_GEN6(dev_priv) || IS_IVYBRIDGE(dev_priv))
> - dev_priv->display.get_cdclk = i945_get_cdclk;
> + dev_priv->display.get_cdclk = fixed_450mhz_get_cdclk;
> else if (IS_GM45(dev_priv))
> dev_priv->display.get_cdclk = gm45_get_cdclk;
> + else if (IS_G4X(dev_priv))
> + dev_priv->display.get_cdclk = g33_get_cdclk;
> else if (IS_I965GM(dev_priv))
> dev_priv->display.get_cdclk = i965gm_get_cdclk;
> + else if (IS_I965G(dev_priv))
> + dev_priv->display.get_cdclk = fixed_400mhz_get_cdclk;
> else if (IS_PINEVIEW(dev_priv))
> dev_priv->display.get_cdclk = pnv_get_cdclk;
> - else if (IS_G33(dev_priv) || IS_G4X(dev_priv))
> + else if (IS_G33(dev_priv))
> dev_priv->display.get_cdclk = g33_get_cdclk;
> - else if (IS_I915G(dev_priv))
> - dev_priv->display.get_cdclk = i915_get_cdclk;
> - else if (IS_I945GM(dev_priv) || IS_I845G(dev_priv))
> - dev_priv->display.get_cdclk = i9xx_misc_get_cdclk;
> + else if (IS_I945GM(dev_priv))
> + dev_priv->display.get_cdclk = fixed_200mhz_get_cdclk;
> + else if (IS_I945G(dev_priv))
> + dev_priv->display.get_cdclk = fixed_400mhz_get_cdclk;
> else if (IS_I915GM(dev_priv))
> dev_priv->display.get_cdclk = i915gm_get_cdclk;
> + else if (IS_I915G(dev_priv))
> + dev_priv->display.get_cdclk = fixed_333mhz_get_cdclk;
> else if (IS_I865G(dev_priv))
> - dev_priv->display.get_cdclk = i865_get_cdclk;
> + dev_priv->display.get_cdclk = fixed_266mhz_get_cdclk;
> else if (IS_I85X(dev_priv))
> dev_priv->display.get_cdclk = i85x_get_cdclk;
> + else if (IS_I845G(dev_priv))
> + dev_priv->display.get_cdclk = fixed_200mhz_get_cdclk;
> else { /* 830 */
> WARN(!IS_I830(dev_priv), "Unknown platform. Assuming 133 MHz
> CDCLK\n");
> - dev_priv->display.get_cdclk = i830_get_cdclk;
> + dev_priv->display.get_cdclk = fixed_133mhz_get_cdclk;
> }
I wonder if "switch (dev_priv->info.platform)" is a viable alternative
to some of the worst if ladders we have, like this one.
BR,
Jani.
>
> if (IS_GEN5(dev_priv)) {
--
Jani Nikula, Intel Open Source Technology Center
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