With all of the cdclk function consolidation, we can cut down on a lot
of platform if/else logic by creating a vfunc that's initialized at
startup.

Cc: Ville Syrjälä <ville.syrj...@linux.intel.com>
Signed-off-by: Matt Roper <matthew.d.ro...@intel.com>
---
 drivers/gpu/drm/i915/display/intel_cdclk.c | 76 ++++++++--------------
 drivers/gpu/drm/i915/i915_drv.h            |  1 +
 2 files changed, 28 insertions(+), 49 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_cdclk.c 
b/drivers/gpu/drm/i915/display/intel_cdclk.c
index a70fec82d2bc..a6696697a09f 100644
--- a/drivers/gpu/drm/i915/display/intel_cdclk.c
+++ b/drivers/gpu/drm/i915/display/intel_cdclk.c
@@ -1403,18 +1403,8 @@ static void bxt_get_cdclk(struct drm_i915_private 
*dev_priv,
         * Can't read this out :( Let's assume it's
         * at least what the CDCLK frequency requires.
         */
-       if (IS_ELKHARTLAKE(dev_priv))
-               cdclk_state->voltage_level =
-                       ehl_calc_voltage_level(cdclk_state->cdclk);
-       else if (INTEL_GEN(dev_priv) >= 11)
-               cdclk_state->voltage_level =
-                       icl_calc_voltage_level(cdclk_state->cdclk);
-       else if (INTEL_GEN(dev_priv) >= 10)
-               cdclk_state->voltage_level =
-                       cnl_calc_voltage_level(cdclk_state->cdclk);
-       else
-               cdclk_state->voltage_level =
-                       bxt_calc_voltage_level(cdclk_state->cdclk);
+       cdclk_state->voltage_level =
+               dev_priv->display.calc_voltage_level(cdclk_state->cdclk);
 }
 
 static void bxt_de_pll_disable(struct drm_i915_private *dev_priv)
@@ -1681,7 +1671,8 @@ static void bxt_init_cdclk(struct drm_i915_private 
*dev_priv)
         */
        cdclk_state.cdclk = calc_cdclk(dev_priv, 0);
        cdclk_state.vco = calc_cdclk_pll_vco(dev_priv, cdclk_state.cdclk);
-       cdclk_state.voltage_level = bxt_calc_voltage_level(cdclk_state.cdclk);
+       cdclk_state.voltage_level =
+               dev_priv->display.calc_voltage_level(cdclk_state.cdclk);
 
        bxt_set_cdclk(dev_priv, &cdclk_state, INVALID_PIPE);
 }
@@ -1692,18 +1683,8 @@ static void bxt_uninit_cdclk(struct drm_i915_private 
*dev_priv)
 
        cdclk_state.cdclk = cdclk_state.bypass;
        cdclk_state.vco = 0;
-       if (IS_ELKHARTLAKE(dev_priv))
-               cdclk_state.voltage_level =
-                       ehl_calc_voltage_level(cdclk_state.cdclk);
-       else if (INTEL_GEN(dev_priv) >= 11)
-               cdclk_state.voltage_level =
-                       icl_calc_voltage_level(cdclk_state.cdclk);
-       else if (INTEL_GEN(dev_priv) >= 10)
-               cdclk_state.voltage_level =
-                       cnl_calc_voltage_level(cdclk_state.cdclk);
-       else
-               cdclk_state.voltage_level =
-                       bxt_calc_voltage_level(cdclk_state.cdclk);
+       cdclk_state.voltage_level =
+               dev_priv->display.calc_voltage_level(cdclk_state.cdclk);
 
        bxt_set_cdclk(dev_priv, &cdclk_state, INVALID_PIPE);
 }
@@ -1739,12 +1720,8 @@ static void icl_init_cdclk(struct drm_i915_private 
*dev_priv)
        sanitized_state.cdclk = calc_cdclk(dev_priv, 0);
        sanitized_state.vco = calc_cdclk_pll_vco(dev_priv,
                                                 sanitized_state.cdclk);
-       if (IS_ELKHARTLAKE(dev_priv))
-               sanitized_state.voltage_level =
-                       ehl_calc_voltage_level(sanitized_state.cdclk);
-       else
-               sanitized_state.voltage_level =
-                       icl_calc_voltage_level(sanitized_state.cdclk);
+       sanitized_state.voltage_level =
+               dev_priv->display.calc_voltage_level(sanitized_state.cdclk);
 
        bxt_set_cdclk(dev_priv, &sanitized_state, INVALID_PIPE);
 }
@@ -1763,7 +1740,8 @@ static void cnl_init_cdclk(struct drm_i915_private 
*dev_priv)
 
        cdclk_state.cdclk = calc_cdclk(dev_priv, 0);
        cdclk_state.vco = calc_cdclk_pll_vco(dev_priv, cdclk_state.cdclk);
-       cdclk_state.voltage_level = cnl_calc_voltage_level(cdclk_state.cdclk);
+       cdclk_state.voltage_level =
+               dev_priv->display.calc_voltage_level(cdclk_state.cdclk);
 
        bxt_set_cdclk(dev_priv, &cdclk_state, INVALID_PIPE);
 }
@@ -2255,7 +2233,7 @@ 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 =
-               bxt_calc_voltage_level(cdclk);
+               dev_priv->display.calc_voltage_level(cdclk);
 
        if (!state->active_pipes) {
                cdclk = calc_cdclk(dev_priv, state->cdclk.force_min_cdclk);
@@ -2264,7 +2242,7 @@ static int bxt_modeset_calc_cdclk(struct 
intel_atomic_state *state)
                state->cdclk.actual.vco = vco;
                state->cdclk.actual.cdclk = cdclk;
                state->cdclk.actual.voltage_level =
-                       bxt_calc_voltage_level(cdclk);
+                       dev_priv->display.calc_voltage_level(cdclk);
        } else {
                state->cdclk.actual = state->cdclk.logical;
        }
@@ -2319,14 +2297,9 @@ static int icl_modeset_calc_cdclk(struct 
intel_atomic_state *state)
 
        state->cdclk.logical.vco = vco;
        state->cdclk.logical.cdclk = cdclk;
-       if (IS_ELKHARTLAKE(dev_priv))
-               state->cdclk.logical.voltage_level =
-                       max(ehl_calc_voltage_level(cdclk),
-                           cnl_compute_min_voltage_level(state));
-       else
-               state->cdclk.logical.voltage_level =
-                       max(icl_calc_voltage_level(cdclk),
-                           cnl_compute_min_voltage_level(state));
+       state->cdclk.logical.voltage_level =
+               max(dev_priv->display.calc_voltage_level(cdclk),
+                   cnl_compute_min_voltage_level(state));
 
        if (!state->active_pipes) {
                cdclk = calc_cdclk(dev_priv, state->cdclk.force_min_cdclk);
@@ -2334,12 +2307,8 @@ static int icl_modeset_calc_cdclk(struct 
intel_atomic_state *state)
 
                state->cdclk.actual.vco = vco;
                state->cdclk.actual.cdclk = cdclk;
-               if (IS_ELKHARTLAKE(dev_priv))
-                       state->cdclk.actual.voltage_level =
-                               ehl_calc_voltage_level(cdclk);
-               else
-                       state->cdclk.actual.voltage_level =
-                               icl_calc_voltage_level(cdclk);
+               state->cdclk.actual.voltage_level =
+                       dev_priv->display.calc_voltage_level(cdclk);
        } else {
                state->cdclk.actual = state->cdclk.logical;
        }
@@ -2563,19 +2532,28 @@ void intel_update_rawclk(struct drm_i915_private 
*dev_priv)
  */
 void intel_init_cdclk_hooks(struct drm_i915_private *dev_priv)
 {
-       if (INTEL_GEN(dev_priv) >= 11) {
+       if (IS_ELKHARTLAKE(dev_priv)) {
+               dev_priv->display.set_cdclk = bxt_set_cdclk;
+               dev_priv->display.modeset_calc_cdclk = icl_modeset_calc_cdclk;
+               dev_priv->display.calc_voltage_level = ehl_calc_voltage_level;
+               dev_priv->cdclk.table = icl_cdclk_table;
+               dev_priv->cdclk.table_size = ARRAY_SIZE(icl_cdclk_table);
+       } else if (INTEL_GEN(dev_priv) >= 11) {
                dev_priv->display.set_cdclk = bxt_set_cdclk;
                dev_priv->display.modeset_calc_cdclk = icl_modeset_calc_cdclk;
+               dev_priv->display.calc_voltage_level = icl_calc_voltage_level;
                dev_priv->cdclk.table = icl_cdclk_table;
                dev_priv->cdclk.table_size = ARRAY_SIZE(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.calc_voltage_level = cnl_calc_voltage_level;
                dev_priv->cdclk.table = cnl_cdclk_table;
                dev_priv->cdclk.table_size = ARRAY_SIZE(cnl_cdclk_table);
        } else if (IS_GEN9_LP(dev_priv)) {
                dev_priv->display.set_cdclk = bxt_set_cdclk;
                dev_priv->display.modeset_calc_cdclk = bxt_modeset_calc_cdclk;
+               dev_priv->display.calc_voltage_level = bxt_calc_voltage_level;
                dev_priv->cdclk.table = bxt_cdclk_table;
                dev_priv->cdclk.table_size = ARRAY_SIZE(bxt_cdclk_table);
        } else if (IS_GEN9_BC(dev_priv)) {
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index a4d249193dc8..a56da431bfe3 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -276,6 +276,7 @@ struct drm_i915_display_funcs {
        int (*compute_global_watermarks)(struct intel_atomic_state *state);
        void (*update_wm)(struct intel_crtc *crtc);
        int (*modeset_calc_cdclk)(struct intel_atomic_state *state);
+       u8 (*calc_voltage_level)(int cdclk);
        /* Returns the active state of the crtc, and if the crtc is active,
         * fills out the pipe-config with the hw state. */
        bool (*get_pipe_config)(struct intel_crtc *,
-- 
2.20.1

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