drm/i915: Remove duplicated bxt/cnl/icl .modeset_calc_cdclk() funcs

Reuse the same .modeset_calc_cdclk() function for all bxt+.

The only difference in between the cnl/icl and the bxt variants
is the call to cnl_compute_min_voltage_level(). We can do that call
just fine on older platforms since they leave min_voltage_level[]
zeroed. Let's rename the function to bxt_compute_min_voltage_level()
just so it stays consistent with the rest of the naming scheme.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20190911133129.27466-4-ville.syrjala@linux.intel.com

diff --git a/drivers/gpu/drm/i915/display/intel_cdclk.c b/drivers/gpu/drm/i915/display/intel_cdclk.c
index 3bc7047..ea3f75c 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_cdclk.c
+++ b/drivers/gpu/drm/i915/display/intel_cdclk.c
@@ -2017,6 +2017,10 @@ static int intel_compute_min_cdclk(struct intel_atomic_state *state)
 }
 
 /*
+ * Account for port clock min voltage level requirements.
+ * This only really does something on CNL+ but can be
+ * called on earlier platforms as well.
+ *
  * Note that this functions assumes that 0 is
  * the lowest voltage value, and higher values
  * correspond to increasingly higher voltages.
@@ -2025,7 +2029,7 @@ static int intel_compute_min_cdclk(struct intel_atomic_state *state)
  * future platforms this code will need to be
  * adjusted.
  */
-static u8 cnl_compute_min_voltage_level(struct intel_atomic_state *state)
+static u8 bxt_compute_min_voltage_level(struct intel_atomic_state *state)
 {
        struct drm_i915_private *dev_priv = to_i915(state->base.dev);
        struct intel_crtc *crtc;
@@ -2198,40 +2202,8 @@ static int bxt_modeset_calc_cdclk(struct intel_atomic_state *state)
        state->cdclk.logical.vco = vco;
        state->cdclk.logical.cdclk = cdclk;
        state->cdclk.logical.voltage_level =
-               dev_priv->display.calc_voltage_level(cdclk);
-
-       if (!state->active_pipes) {
-               cdclk = bxt_calc_cdclk(dev_priv, state->cdclk.force_min_cdclk);
-               vco = bxt_calc_cdclk_pll_vco(dev_priv, cdclk);
-
-               state->cdclk.actual.vco = vco;
-               state->cdclk.actual.cdclk = cdclk;
-               state->cdclk.actual.voltage_level =
-                       dev_priv->display.calc_voltage_level(cdclk);
-       } else {
-               state->cdclk.actual = state->cdclk.logical;
-       }
-
-       return 0;
-}
-
-static int cnl_modeset_calc_cdclk(struct intel_atomic_state *state)
-{
-       struct drm_i915_private *dev_priv = to_i915(state->base.dev);
-       int min_cdclk, cdclk, vco;
-
-       min_cdclk = intel_compute_min_cdclk(state);
-       if (min_cdclk < 0)
-               return min_cdclk;
-
-       cdclk = bxt_calc_cdclk(dev_priv, min_cdclk);
-       vco = bxt_calc_cdclk_pll_vco(dev_priv, cdclk);
-
-       state->cdclk.logical.vco = vco;
-       state->cdclk.logical.cdclk = cdclk;
-       state->cdclk.logical.voltage_level =
                max(dev_priv->display.calc_voltage_level(cdclk),
-                   cnl_compute_min_voltage_level(state));
+                   bxt_compute_min_voltage_level(state));
 
        if (!state->active_pipes) {
                cdclk = bxt_calc_cdclk(dev_priv, state->cdclk.force_min_cdclk);
@@ -2466,17 +2438,17 @@ void intel_init_cdclk_hooks(struct drm_i915_private *dev_priv)
 {
        if (IS_ELKHARTLAKE(dev_priv)) {
                dev_priv->display.set_cdclk = bxt_set_cdclk;
-               dev_priv->display.modeset_calc_cdclk = cnl_modeset_calc_cdclk;
+               dev_priv->display.modeset_calc_cdclk = bxt_modeset_calc_cdclk;
                dev_priv->display.calc_voltage_level = ehl_calc_voltage_level;
                dev_priv->cdclk.table = icl_cdclk_table;
        } else if (INTEL_GEN(dev_priv) >= 11) {
                dev_priv->display.set_cdclk = bxt_set_cdclk;
-               dev_priv->display.modeset_calc_cdclk = cnl_modeset_calc_cdclk;
+               dev_priv->display.modeset_calc_cdclk = bxt_modeset_calc_cdclk;
                dev_priv->display.calc_voltage_level = icl_calc_voltage_level;
                dev_priv->cdclk.table = icl_cdclk_table;
        } else if (IS_CANNONLAKE(dev_priv)) {
                dev_priv->display.set_cdclk = bxt_set_cdclk;
-               dev_priv->display.modeset_calc_cdclk = cnl_modeset_calc_cdclk;
+               dev_priv->display.modeset_calc_cdclk = bxt_modeset_calc_cdclk;
                dev_priv->display.calc_voltage_level = cnl_calc_voltage_level;
                dev_priv->cdclk.table = cnl_cdclk_table;
        } else if (IS_GEN9_LP(dev_priv)) {