drm/i915: constify the cdclk vtable

This is a bit of a twisty one since each platform is slightly
different, so might take some more review care.
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/75e0139b28cca9ceff77de72c3ef737c101255ba.1632869550.git.jani.nikula@intel.com

drivers/gpu/drm/i915/display/intel_cdclk.c

@@ -62,32 +62,32 @@
 void intel_cdclk_get_cdclk(struct drm_i915_private *dev_priv,
 			   struct intel_cdclk_config *cdclk_config)
 {
-	dev_priv->cdclk_funcs.get_cdclk(dev_priv, cdclk_config);
+	dev_priv->cdclk_funcs->get_cdclk(dev_priv, cdclk_config);
 }
 
 int intel_cdclk_bw_calc_min_cdclk(struct intel_atomic_state *state)
 {
 	struct drm_i915_private *dev_priv = to_i915(state->base.dev);
-	return dev_priv->cdclk_funcs.bw_calc_min_cdclk(state);
+	return dev_priv->cdclk_funcs->bw_calc_min_cdclk(state);
 }
 
 static void intel_cdclk_set_cdclk(struct drm_i915_private *dev_priv,
 				  const struct intel_cdclk_config *cdclk_config,
 				  enum pipe pipe)
 {
-	dev_priv->cdclk_funcs.set_cdclk(dev_priv, cdclk_config, pipe);
+	dev_priv->cdclk_funcs->set_cdclk(dev_priv, cdclk_config, pipe);
 }
 
 static int intel_cdclk_modeset_calc_cdclk(struct drm_i915_private *dev_priv,
 					  struct intel_cdclk_state *cdclk_config)
 {
-	return dev_priv->cdclk_funcs.modeset_calc_cdclk(cdclk_config);
+	return dev_priv->cdclk_funcs->modeset_calc_cdclk(cdclk_config);
 }
 
 static u8 intel_cdclk_calc_voltage_level(struct drm_i915_private *dev_priv,
 					 int cdclk)
 {
-	return dev_priv->cdclk_funcs.calc_voltage_level(cdclk);
+	return dev_priv->cdclk_funcs->calc_voltage_level(cdclk);
 }
 
 static void fixed_133mhz_get_cdclk(struct drm_i915_private *dev_priv,
@@ -1963,7 +1963,7 @@ static void intel_set_cdclk(struct drm_i915_private *dev_priv,
 	if (!intel_cdclk_changed(&dev_priv->cdclk.hw, cdclk_config))
 		return;
 
-	if (drm_WARN_ON_ONCE(&dev_priv->drm, !dev_priv->cdclk_funcs.set_cdclk))
+	if (drm_WARN_ON_ONCE(&dev_priv->drm, !dev_priv->cdclk_funcs->set_cdclk))
 		return;
 
 	intel_dump_cdclk_config(cdclk_config, "Changing CDCLK to");
@@ -2884,6 +2884,157 @@ u32 intel_read_rawclk(struct drm_i915_private *dev_priv)
 	return freq;
 }
 
+static struct intel_cdclk_funcs tgl_cdclk_funcs = {
+	.get_cdclk = bxt_get_cdclk,
+	.set_cdclk = bxt_set_cdclk,
+	.bw_calc_min_cdclk = skl_bw_calc_min_cdclk,
+	.modeset_calc_cdclk = bxt_modeset_calc_cdclk,
+	.calc_voltage_level = tgl_calc_voltage_level,
+};
+
+static struct intel_cdclk_funcs ehl_cdclk_funcs = {
+	.get_cdclk = bxt_get_cdclk,
+	.set_cdclk = bxt_set_cdclk,
+	.bw_calc_min_cdclk = skl_bw_calc_min_cdclk,
+	.modeset_calc_cdclk = bxt_modeset_calc_cdclk,
+	.calc_voltage_level = ehl_calc_voltage_level,
+};
+
+static struct intel_cdclk_funcs icl_cdclk_funcs = {
+	.get_cdclk = bxt_get_cdclk,
+	.set_cdclk = bxt_set_cdclk,
+	.bw_calc_min_cdclk = skl_bw_calc_min_cdclk,
+	.modeset_calc_cdclk = bxt_modeset_calc_cdclk,
+	.calc_voltage_level = icl_calc_voltage_level,
+};
+
+static struct intel_cdclk_funcs bxt_cdclk_funcs = {
+	.get_cdclk = bxt_get_cdclk,
+	.set_cdclk = bxt_set_cdclk,
+	.bw_calc_min_cdclk = skl_bw_calc_min_cdclk,
+	.modeset_calc_cdclk = bxt_modeset_calc_cdclk,
+	.calc_voltage_level = bxt_calc_voltage_level,
+};
+
+static struct intel_cdclk_funcs skl_cdclk_funcs = {
+	.get_cdclk = skl_get_cdclk,
+	.set_cdclk = skl_set_cdclk,
+	.bw_calc_min_cdclk = skl_bw_calc_min_cdclk,
+	.modeset_calc_cdclk = skl_modeset_calc_cdclk,
+};
+
+static struct intel_cdclk_funcs bdw_cdclk_funcs = {
+	.get_cdclk = bdw_get_cdclk,
+	.set_cdclk = bdw_set_cdclk,
+	.bw_calc_min_cdclk = intel_bw_calc_min_cdclk,
+	.modeset_calc_cdclk = bdw_modeset_calc_cdclk,
+};
+
+static struct intel_cdclk_funcs chv_cdclk_funcs = {
+	.get_cdclk = vlv_get_cdclk,
+	.set_cdclk = chv_set_cdclk,
+	.bw_calc_min_cdclk = intel_bw_calc_min_cdclk,
+	.modeset_calc_cdclk = vlv_modeset_calc_cdclk,
+};
+
+static struct intel_cdclk_funcs vlv_cdclk_funcs = {
+	.get_cdclk = vlv_get_cdclk,
+	.set_cdclk = vlv_set_cdclk,
+	.bw_calc_min_cdclk = intel_bw_calc_min_cdclk,
+	.modeset_calc_cdclk = vlv_modeset_calc_cdclk,
+};
+
+static struct intel_cdclk_funcs hsw_cdclk_funcs = {
+	.get_cdclk = hsw_get_cdclk,
+	.bw_calc_min_cdclk = intel_bw_calc_min_cdclk,
+	.modeset_calc_cdclk = fixed_modeset_calc_cdclk,
+};
+
+/* SNB, IVB, 965G, 945G */
+static struct intel_cdclk_funcs fixed_400mhz_cdclk_funcs = {
+	.get_cdclk = fixed_400mhz_get_cdclk,
+	.bw_calc_min_cdclk = intel_bw_calc_min_cdclk,
+	.modeset_calc_cdclk = fixed_modeset_calc_cdclk,
+};
+
+static struct intel_cdclk_funcs ilk_cdclk_funcs = {
+	.get_cdclk = fixed_450mhz_get_cdclk,
+	.bw_calc_min_cdclk = intel_bw_calc_min_cdclk,
+	.modeset_calc_cdclk = fixed_modeset_calc_cdclk,
+};
+
+static struct intel_cdclk_funcs gm45_cdclk_funcs = {
+	.get_cdclk = gm45_get_cdclk,
+	.bw_calc_min_cdclk = intel_bw_calc_min_cdclk,
+	.modeset_calc_cdclk = fixed_modeset_calc_cdclk,
+};
+
+/* G45 uses G33 */
+
+static struct intel_cdclk_funcs i965gm_cdclk_funcs = {
+	.get_cdclk = i965gm_get_cdclk,
+	.bw_calc_min_cdclk = intel_bw_calc_min_cdclk,
+	.modeset_calc_cdclk = fixed_modeset_calc_cdclk,
+};
+
+/* i965G uses fixed 400 */
+
+static struct intel_cdclk_funcs pnv_cdclk_funcs = {
+	.get_cdclk = pnv_get_cdclk,
+	.bw_calc_min_cdclk = intel_bw_calc_min_cdclk,
+	.modeset_calc_cdclk = fixed_modeset_calc_cdclk,
+};
+
+static struct intel_cdclk_funcs g33_cdclk_funcs = {
+	.get_cdclk = g33_get_cdclk,
+	.bw_calc_min_cdclk = intel_bw_calc_min_cdclk,
+	.modeset_calc_cdclk = fixed_modeset_calc_cdclk,
+};
+
+static struct intel_cdclk_funcs i945gm_cdclk_funcs = {
+	.get_cdclk = i945gm_get_cdclk,
+	.bw_calc_min_cdclk = intel_bw_calc_min_cdclk,
+	.modeset_calc_cdclk = fixed_modeset_calc_cdclk,
+};
+
+/* i945G uses fixed 400 */
+
+static struct intel_cdclk_funcs i915gm_cdclk_funcs = {
+	.get_cdclk = i915gm_get_cdclk,
+	.bw_calc_min_cdclk = intel_bw_calc_min_cdclk,
+	.modeset_calc_cdclk = fixed_modeset_calc_cdclk,
+};
+
+static struct intel_cdclk_funcs i915g_cdclk_funcs = {
+	.get_cdclk = fixed_333mhz_get_cdclk,
+	.bw_calc_min_cdclk = intel_bw_calc_min_cdclk,
+	.modeset_calc_cdclk = fixed_modeset_calc_cdclk,
+};
+
+static struct intel_cdclk_funcs i865g_cdclk_funcs = {
+	.get_cdclk = fixed_266mhz_get_cdclk,
+	.bw_calc_min_cdclk = intel_bw_calc_min_cdclk,
+	.modeset_calc_cdclk = fixed_modeset_calc_cdclk,
+};
+
+static struct intel_cdclk_funcs i85x_cdclk_funcs = {
+	.get_cdclk = i85x_get_cdclk,
+	.bw_calc_min_cdclk = intel_bw_calc_min_cdclk,
+	.modeset_calc_cdclk = fixed_modeset_calc_cdclk,
+};
+
+static struct intel_cdclk_funcs i845g_cdclk_funcs = {
+	.get_cdclk = fixed_200mhz_get_cdclk,
+	.bw_calc_min_cdclk = intel_bw_calc_min_cdclk,
+	.modeset_calc_cdclk = fixed_modeset_calc_cdclk,
+};
+
+static struct intel_cdclk_funcs i830_cdclk_funcs = {
+	.get_cdclk = fixed_133mhz_get_cdclk,
+	.bw_calc_min_cdclk = intel_bw_calc_min_cdclk,
+	.modeset_calc_cdclk = fixed_modeset_calc_cdclk,
+};
+
 /**
  * intel_init_cdclk_hooks - Initialize CDCLK related modesetting hooks
  * @dev_priv: i915 device
@@ -2891,119 +3042,78 @@ u32 intel_read_rawclk(struct drm_i915_private *dev_priv)
 void intel_init_cdclk_hooks(struct drm_i915_private *dev_priv)
 {
 	if (IS_DG2(dev_priv)) {
-		dev_priv->cdclk_funcs.set_cdclk = bxt_set_cdclk;
-		dev_priv->cdclk_funcs.bw_calc_min_cdclk = skl_bw_calc_min_cdclk;
-		dev_priv->cdclk_funcs.modeset_calc_cdclk = bxt_modeset_calc_cdclk;
-		dev_priv->cdclk_funcs.calc_voltage_level = tgl_calc_voltage_level;
+		dev_priv->cdclk_funcs = &tgl_cdclk_funcs;
 		dev_priv->cdclk.table = dg2_cdclk_table;
 	} else if (IS_ALDERLAKE_P(dev_priv)) {
-		dev_priv->cdclk_funcs.set_cdclk = bxt_set_cdclk;
-		dev_priv->cdclk_funcs.bw_calc_min_cdclk = skl_bw_calc_min_cdclk;
-		dev_priv->cdclk_funcs.modeset_calc_cdclk = bxt_modeset_calc_cdclk;
-		dev_priv->cdclk_funcs.calc_voltage_level = tgl_calc_voltage_level;
+		dev_priv->cdclk_funcs = &tgl_cdclk_funcs;
 		/* Wa_22011320316:adl-p[a0] */
 		if (IS_ADLP_DISPLAY_STEP(dev_priv, STEP_A0, STEP_B0))
 			dev_priv->cdclk.table = adlp_a_step_cdclk_table;
 		else
 			dev_priv->cdclk.table = adlp_cdclk_table;
 	} else if (IS_ROCKETLAKE(dev_priv)) {
-		dev_priv->cdclk_funcs.set_cdclk = bxt_set_cdclk;
-		dev_priv->cdclk_funcs.bw_calc_min_cdclk = skl_bw_calc_min_cdclk;
-		dev_priv->cdclk_funcs.modeset_calc_cdclk = bxt_modeset_calc_cdclk;
-		dev_priv->cdclk_funcs.calc_voltage_level = tgl_calc_voltage_level;
+		dev_priv->cdclk_funcs = &tgl_cdclk_funcs;
 		dev_priv->cdclk.table = rkl_cdclk_table;
 	} else if (DISPLAY_VER(dev_priv) >= 12) {
-		dev_priv->cdclk_funcs.set_cdclk = bxt_set_cdclk;
-		dev_priv->cdclk_funcs.bw_calc_min_cdclk = skl_bw_calc_min_cdclk;
-		dev_priv->cdclk_funcs.modeset_calc_cdclk = bxt_modeset_calc_cdclk;
-		dev_priv->cdclk_funcs.calc_voltage_level = tgl_calc_voltage_level;
+		dev_priv->cdclk_funcs = &tgl_cdclk_funcs;
 		dev_priv->cdclk.table = icl_cdclk_table;
 	} else if (IS_JSL_EHL(dev_priv)) {
-		dev_priv->cdclk_funcs.set_cdclk = bxt_set_cdclk;
-		dev_priv->cdclk_funcs.bw_calc_min_cdclk = skl_bw_calc_min_cdclk;
-		dev_priv->cdclk_funcs.modeset_calc_cdclk = bxt_modeset_calc_cdclk;
-		dev_priv->cdclk_funcs.calc_voltage_level = ehl_calc_voltage_level;
+		dev_priv->cdclk_funcs = &ehl_cdclk_funcs;
 		dev_priv->cdclk.table = icl_cdclk_table;
 	} else if (DISPLAY_VER(dev_priv) >= 11) {
-		dev_priv->cdclk_funcs.set_cdclk = bxt_set_cdclk;
-		dev_priv->cdclk_funcs.bw_calc_min_cdclk = skl_bw_calc_min_cdclk;
-		dev_priv->cdclk_funcs.modeset_calc_cdclk = bxt_modeset_calc_cdclk;
-		dev_priv->cdclk_funcs.calc_voltage_level = icl_calc_voltage_level;
+		dev_priv->cdclk_funcs = &icl_cdclk_funcs;
 		dev_priv->cdclk.table = icl_cdclk_table;
 	} else if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv)) {
-		dev_priv->cdclk_funcs.bw_calc_min_cdclk = skl_bw_calc_min_cdclk;
-		dev_priv->cdclk_funcs.set_cdclk = bxt_set_cdclk;
-		dev_priv->cdclk_funcs.modeset_calc_cdclk = bxt_modeset_calc_cdclk;
-		dev_priv->cdclk_funcs.calc_voltage_level = bxt_calc_voltage_level;
+		dev_priv->cdclk_funcs = &bxt_cdclk_funcs;
 		if (IS_GEMINILAKE(dev_priv))
 			dev_priv->cdclk.table = glk_cdclk_table;
 		else
 			dev_priv->cdclk.table = bxt_cdclk_table;
 	} else if (DISPLAY_VER(dev_priv) == 9) {
-		dev_priv->cdclk_funcs.bw_calc_min_cdclk = skl_bw_calc_min_cdclk;
-		dev_priv->cdclk_funcs.set_cdclk = skl_set_cdclk;
-		dev_priv->cdclk_funcs.modeset_calc_cdclk = skl_modeset_calc_cdclk;
+		dev_priv->cdclk_funcs = &skl_cdclk_funcs;
 	} else if (IS_BROADWELL(dev_priv)) {
-		dev_priv->cdclk_funcs.bw_calc_min_cdclk = intel_bw_calc_min_cdclk;
-		dev_priv->cdclk_funcs.set_cdclk = bdw_set_cdclk;
-		dev_priv->cdclk_funcs.modeset_calc_cdclk = bdw_modeset_calc_cdclk;
+		dev_priv->cdclk_funcs = &bdw_cdclk_funcs;
+	} else if (IS_HASWELL(dev_priv)) {
+		dev_priv->cdclk_funcs = &hsw_cdclk_funcs;
 	} else if (IS_CHERRYVIEW(dev_priv)) {
-		dev_priv->cdclk_funcs.bw_calc_min_cdclk = intel_bw_calc_min_cdclk;
-		dev_priv->cdclk_funcs.set_cdclk = chv_set_cdclk;
-		dev_priv->cdclk_funcs.modeset_calc_cdclk = vlv_modeset_calc_cdclk;
+		dev_priv->cdclk_funcs = &chv_cdclk_funcs;
 	} else if (IS_VALLEYVIEW(dev_priv)) {
-		dev_priv->cdclk_funcs.bw_calc_min_cdclk = intel_bw_calc_min_cdclk;
-		dev_priv->cdclk_funcs.set_cdclk = vlv_set_cdclk;
-		dev_priv->cdclk_funcs.modeset_calc_cdclk = vlv_modeset_calc_cdclk;
-	} else {
-		dev_priv->cdclk_funcs.bw_calc_min_cdclk = intel_bw_calc_min_cdclk;
-		dev_priv->cdclk_funcs.modeset_calc_cdclk = fixed_modeset_calc_cdclk;
+		dev_priv->cdclk_funcs = &vlv_cdclk_funcs;
+	} else if (IS_SANDYBRIDGE(dev_priv) || IS_IVYBRIDGE(dev_priv)) {
+		dev_priv->cdclk_funcs = &fixed_400mhz_cdclk_funcs;
+	} else if (IS_IRONLAKE(dev_priv)) {
+		dev_priv->cdclk_funcs = &ilk_cdclk_funcs;
+	} else if (IS_GM45(dev_priv)) {
+		dev_priv->cdclk_funcs = &gm45_cdclk_funcs;
+	} else if (IS_G45(dev_priv)) {
+		dev_priv->cdclk_funcs = &g33_cdclk_funcs;
+	} else if (IS_I965GM(dev_priv)) {
+		dev_priv->cdclk_funcs = &i965gm_cdclk_funcs;
+	} else if (IS_I965G(dev_priv)) {
+		dev_priv->cdclk_funcs = &fixed_400mhz_cdclk_funcs;
+	} else if (IS_PINEVIEW(dev_priv)) {
+		dev_priv->cdclk_funcs = &pnv_cdclk_funcs;
+	} else if (IS_G33(dev_priv)) {
+		dev_priv->cdclk_funcs = &g33_cdclk_funcs;
+	} else if (IS_I945GM(dev_priv)) {
+		dev_priv->cdclk_funcs = &i945gm_cdclk_funcs;
+	} else if (IS_I945G(dev_priv)) {
+		dev_priv->cdclk_funcs = &fixed_400mhz_cdclk_funcs;
+	} else if (IS_I915GM(dev_priv)) {
+		dev_priv->cdclk_funcs = &i915gm_cdclk_funcs;
+	} else if (IS_I915G(dev_priv)) {
+		dev_priv->cdclk_funcs = &i915g_cdclk_funcs;
+	} else if (IS_I865G(dev_priv)) {
+		dev_priv->cdclk_funcs = &i865g_cdclk_funcs;
+	} else if (IS_I85X(dev_priv)) {
+		dev_priv->cdclk_funcs = &i85x_cdclk_funcs;
+	} else if (IS_I845G(dev_priv)) {
+		dev_priv->cdclk_funcs = &i845g_cdclk_funcs;
+	} else if (IS_I830(dev_priv)) {
+		dev_priv->cdclk_funcs = &i830_cdclk_funcs;
 	}
 
-	if (DISPLAY_VER(dev_priv) >= 10 || IS_BROXTON(dev_priv))
-		dev_priv->cdclk_funcs.get_cdclk = bxt_get_cdclk;
-	else if (DISPLAY_VER(dev_priv) == 9)
-		dev_priv->cdclk_funcs.get_cdclk = skl_get_cdclk;
-	else if (IS_BROADWELL(dev_priv))
-		dev_priv->cdclk_funcs.get_cdclk = bdw_get_cdclk;
-	else if (IS_HASWELL(dev_priv))
-		dev_priv->cdclk_funcs.get_cdclk = hsw_get_cdclk;
-	else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
-		dev_priv->cdclk_funcs.get_cdclk = vlv_get_cdclk;
-	else if (IS_SANDYBRIDGE(dev_priv) || IS_IVYBRIDGE(dev_priv))
-		dev_priv->cdclk_funcs.get_cdclk = fixed_400mhz_get_cdclk;
-	else if (IS_IRONLAKE(dev_priv))
-		dev_priv->cdclk_funcs.get_cdclk = fixed_450mhz_get_cdclk;
-	else if (IS_GM45(dev_priv))
-		dev_priv->cdclk_funcs.get_cdclk = gm45_get_cdclk;
-	else if (IS_G45(dev_priv))
-		dev_priv->cdclk_funcs.get_cdclk = g33_get_cdclk;
-	else if (IS_I965GM(dev_priv))
-		dev_priv->cdclk_funcs.get_cdclk = i965gm_get_cdclk;
-	else if (IS_I965G(dev_priv))
-		dev_priv->cdclk_funcs.get_cdclk = fixed_400mhz_get_cdclk;
-	else if (IS_PINEVIEW(dev_priv))
-		dev_priv->cdclk_funcs.get_cdclk = pnv_get_cdclk;
-	else if (IS_G33(dev_priv))
-		dev_priv->cdclk_funcs.get_cdclk = g33_get_cdclk;
-	else if (IS_I945GM(dev_priv))
-		dev_priv->cdclk_funcs.get_cdclk = i945gm_get_cdclk;
-	else if (IS_I945G(dev_priv))
-		dev_priv->cdclk_funcs.get_cdclk = fixed_400mhz_get_cdclk;
-	else if (IS_I915GM(dev_priv))
-		dev_priv->cdclk_funcs.get_cdclk = i915gm_get_cdclk;
-	else if (IS_I915G(dev_priv))
-		dev_priv->cdclk_funcs.get_cdclk = fixed_333mhz_get_cdclk;
-	else if (IS_I865G(dev_priv))
-		dev_priv->cdclk_funcs.get_cdclk = fixed_266mhz_get_cdclk;
-	else if (IS_I85X(dev_priv))
-		dev_priv->cdclk_funcs.get_cdclk = i85x_get_cdclk;
-	else if (IS_I845G(dev_priv))
-		dev_priv->cdclk_funcs.get_cdclk = fixed_200mhz_get_cdclk;
-	else if (IS_I830(dev_priv))
-		dev_priv->cdclk_funcs.get_cdclk = fixed_133mhz_get_cdclk;
-
-	if (drm_WARN(&dev_priv->drm, !dev_priv->cdclk_funcs.get_cdclk,
-		     "Unknown platform. Assuming 133 MHz CDCLK\n"))
-		dev_priv->cdclk_funcs.get_cdclk = fixed_133mhz_get_cdclk;
+	if (drm_WARN(&dev_priv->drm, !dev_priv->cdclk_funcs,
+		     "Unknown platform. Assuming i830\n"))
+		dev_priv->cdclk_funcs = &i830_cdclk_funcs;
 }

drivers/gpu/drm/i915/i915_drv.h

@@ -1006,7 +1006,7 @@ struct drm_i915_private {
 	const struct intel_audio_funcs *audio_funcs;
 
 	/* Display CDCLK functions */
-	struct intel_cdclk_funcs cdclk_funcs;
+	const struct intel_cdclk_funcs *cdclk_funcs;
 
 	/* PCH chipset type */
 	enum intel_pch pch_type;