drm/i915: Constify power well descriptors

It makes sense to keep unchanging data const. Extract such fields from
the i915_power_well struct into a new i915_power_well_desc struct that
we initialize during compile time. For the rest of the dynamic
fields allocate an array of i915_power_well objects in i915 dev_priv,
and link to each of these objects their corresponding
i915_power_well_desc object.

v2:
- Fix checkpatch warnings about missing param name in fn declaration and
  lines over 80 chars. (Paulo)
- Move check for unique IDs to __set_power_wells().

Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
[Fixed checkpatch warn in __set_power_wells()]
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180806095843.13294-5-imre.deak@intel.com

1 files changed, 117 insertions, 89 deletions

diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c
index b2d182cc3319..9f44a2b0113a 100644
--- a/drivers/gpu/drm/i915/intel_runtime_pm.c
+++ b/drivers/gpu/drm/i915/intel_runtime_pm.c
@@ -159,17 +159,17 @@ intel_display_power_domain_str(enum intel_display_power_domain domain)
 static void intel_power_well_enable(struct drm_i915_private *dev_priv,
                                     struct i915_power_well *power_well)
 {
-        DRM_DEBUG_KMS("enabling %s\n", power_well->name);
-        power_well->ops->enable(dev_priv, power_well);
+        DRM_DEBUG_KMS("enabling %s\n", power_well->desc->name);
+        power_well->desc->ops->enable(dev_priv, power_well);
         power_well->hw_enabled = true;
 }
 
 static void intel_power_well_disable(struct drm_i915_private *dev_priv,
                                      struct i915_power_well *power_well)
 {
-        DRM_DEBUG_KMS("disabling %s\n", power_well->name);
+        DRM_DEBUG_KMS("disabling %s\n", power_well->desc->name);
         power_well->hw_enabled = false;
-        power_well->ops->disable(dev_priv, power_well);
+        power_well->desc->ops->disable(dev_priv, power_well);
 }
 
 static void intel_power_well_get(struct drm_i915_private *dev_priv,
@@ -183,7 +183,7 @@ static void intel_power_well_put(struct drm_i915_private *dev_priv,
                                  struct i915_power_well *power_well)
 {
         WARN(!power_well->count, "Use count on power well %s is already zero",
-             power_well->name);
+             power_well->desc->name);
 
         if (!--power_well->count)
                 intel_power_well_disable(dev_priv, power_well);
@@ -213,7 +213,7 @@ bool __intel_display_power_is_enabled(struct drm_i915_private *dev_priv,
         is_enabled = true;
 
         for_each_power_domain_well_rev(dev_priv, power_well, BIT_ULL(domain)) {
-                if (power_well->always_on)
+                if (power_well->desc->always_on)
                         continue;
 
                 if (!power_well->hw_enabled) {
@@ -323,7 +323,7 @@ static void hsw_power_well_pre_disable(struct drm_i915_private *dev_priv,
 static void hsw_wait_for_power_well_enable(struct drm_i915_private *dev_priv,
                                            struct i915_power_well *power_well)
 {
-        enum i915_power_well_id id = power_well->id;
+        enum i915_power_well_id id = power_well->desc->id;
 
         /* Timeout for PW1:10 us, AUX:not specified, other PWs:20 us. */
         WARN_ON(intel_wait_for_register(dev_priv,
@@ -350,7 +350,7 @@ static u32 hsw_power_well_requesters(struct drm_i915_private *dev_priv,
 static void hsw_wait_for_power_well_disable(struct drm_i915_private *dev_priv,
                                             struct i915_power_well *power_well)
 {
-        enum i915_power_well_id id = power_well->id;
+        enum i915_power_well_id id = power_well->desc->id;
         bool disabled;
         u32 reqs;
 
@@ -370,7 +370,7 @@ static void hsw_wait_for_power_well_disable(struct drm_i915_private *dev_priv,
                 return;
 
         DRM_DEBUG_KMS("%s forced on (bios:%d driver:%d kvmr:%d debug:%d)\n",
-                      power_well->name,
+                      power_well->desc->name,
                       !!(reqs & 1), !!(reqs & 2), !!(reqs & 4), !!(reqs & 8));
 }
 
@@ -386,8 +386,8 @@ static void gen9_wait_for_power_well_fuses(struct drm_i915_private *dev_priv,
 static void hsw_power_well_enable(struct drm_i915_private *dev_priv,
                                   struct i915_power_well *power_well)
 {
-        enum i915_power_well_id id = power_well->id;
-        bool wait_fuses = power_well->hsw.has_fuses;
+        enum i915_power_well_id id = power_well->desc->id;
+        bool wait_fuses = power_well->desc->hsw.has_fuses;
         enum skl_power_gate uninitialized_var(pg);
         u32 val;
 
@@ -421,17 +421,19 @@ static void hsw_power_well_enable(struct drm_i915_private *dev_priv,
         if (wait_fuses)
                 gen9_wait_for_power_well_fuses(dev_priv, pg);
 
-        hsw_power_well_post_enable(dev_priv, power_well->hsw.irq_pipe_mask,
-                                   power_well->hsw.has_vga);
+        hsw_power_well_post_enable(dev_priv,
+                                   power_well->desc->hsw.irq_pipe_mask,
+                                   power_well->desc->hsw.has_vga);
 }
 
 static void hsw_power_well_disable(struct drm_i915_private *dev_priv,
                                    struct i915_power_well *power_well)
 {
-        enum i915_power_well_id id = power_well->id;
+        enum i915_power_well_id id = power_well->desc->id;
         u32 val;
 
-        hsw_power_well_pre_disable(dev_priv, power_well->hsw.irq_pipe_mask);
+        hsw_power_well_pre_disable(dev_priv,
+                                   power_well->desc->hsw.irq_pipe_mask);
 
         val = I915_READ(HSW_PWR_WELL_CTL_DRIVER(id));
         I915_WRITE(HSW_PWR_WELL_CTL_DRIVER(id),
@@ -445,7 +447,7 @@ static void
 icl_combo_phy_aux_power_well_enable(struct drm_i915_private *dev_priv,
                                     struct i915_power_well *power_well)
 {
-        enum i915_power_well_id id = power_well->id;
+        enum i915_power_well_id id = power_well->desc->id;
         enum port port = ICL_AUX_PW_TO_PORT(id);
         u32 val;
 
@@ -462,7 +464,7 @@ static void
 icl_combo_phy_aux_power_well_disable(struct drm_i915_private *dev_priv,
                                      struct i915_power_well *power_well)
 {
-        enum i915_power_well_id id = power_well->id;
+        enum i915_power_well_id id = power_well->desc->id;
         enum port port = ICL_AUX_PW_TO_PORT(id);
         u32 val;
 
@@ -484,7 +486,7 @@ icl_combo_phy_aux_power_well_disable(struct drm_i915_private *dev_priv,
 static bool hsw_power_well_enabled(struct drm_i915_private *dev_priv,
                                    struct i915_power_well *power_well)
 {
-        enum i915_power_well_id id = power_well->id;
+        enum i915_power_well_id id = power_well->desc->id;
         u32 mask = HSW_PWR_WELL_CTL_REQ(id) | HSW_PWR_WELL_CTL_STATE(id);
 
         return (I915_READ(HSW_PWR_WELL_CTL_DRIVER(id)) & mask) == mask;
@@ -723,7 +725,7 @@ static void skl_enable_dc6(struct drm_i915_private *dev_priv)
 static void hsw_power_well_sync_hw(struct drm_i915_private *dev_priv,
                                    struct i915_power_well *power_well)
 {
-        enum i915_power_well_id id = power_well->id;
+        enum i915_power_well_id id = power_well->desc->id;
         u32 mask = HSW_PWR_WELL_CTL_REQ(id);
         u32 bios_req = I915_READ(HSW_PWR_WELL_CTL_BIOS(id));
 
@@ -740,19 +742,19 @@ static void hsw_power_well_sync_hw(struct drm_i915_private *dev_priv,
 static void bxt_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv,
                                            struct i915_power_well *power_well)
 {
-        bxt_ddi_phy_init(dev_priv, power_well->bxt.phy);
+        bxt_ddi_phy_init(dev_priv, power_well->desc->bxt.phy);
 }
 
 static void bxt_dpio_cmn_power_well_disable(struct drm_i915_private *dev_priv,
                                             struct i915_power_well *power_well)
 {
-        bxt_ddi_phy_uninit(dev_priv, power_well->bxt.phy);
+        bxt_ddi_phy_uninit(dev_priv, power_well->desc->bxt.phy);
 }
 
 static bool bxt_dpio_cmn_power_well_enabled(struct drm_i915_private *dev_priv,
                                             struct i915_power_well *power_well)
 {
-        return bxt_ddi_phy_is_enabled(dev_priv, power_well->bxt.phy);
+        return bxt_ddi_phy_is_enabled(dev_priv, power_well->desc->bxt.phy);
 }
 
 static void bxt_verify_ddi_phy_power_wells(struct drm_i915_private *dev_priv)
@@ -761,16 +763,17 @@ static void bxt_verify_ddi_phy_power_wells(struct drm_i915_private *dev_priv)
 
         power_well = lookup_power_well(dev_priv, BXT_DPIO_CMN_A);
         if (power_well->count > 0)
-                bxt_ddi_phy_verify_state(dev_priv, power_well->bxt.phy);
+                bxt_ddi_phy_verify_state(dev_priv, power_well->desc->bxt.phy);
 
         power_well = lookup_power_well(dev_priv, BXT_DPIO_CMN_BC);
         if (power_well->count > 0)
-                bxt_ddi_phy_verify_state(dev_priv, power_well->bxt.phy);
+                bxt_ddi_phy_verify_state(dev_priv, power_well->desc->bxt.phy);
 
         if (IS_GEMINILAKE(dev_priv)) {
                 power_well = lookup_power_well(dev_priv, GLK_DPIO_CMN_C);
                 if (power_well->count > 0)
-                        bxt_ddi_phy_verify_state(dev_priv, power_well->bxt.phy);
+                        bxt_ddi_phy_verify_state(dev_priv,
+                                                 power_well->desc->bxt.phy);
         }
 }
 
@@ -869,7 +872,7 @@ static void i830_pipes_power_well_sync_hw(struct drm_i915_private *dev_priv,
 static void vlv_set_power_well(struct drm_i915_private *dev_priv,
                                struct i915_power_well *power_well, bool enable)
 {
-        enum i915_power_well_id power_well_id = power_well->id;
+        enum i915_power_well_id power_well_id = power_well->desc->id;
         u32 mask;
         u32 state;
         u32 ctrl;
@@ -917,7 +920,7 @@ static void vlv_power_well_disable(struct drm_i915_private *dev_priv,
 static bool vlv_power_well_enabled(struct drm_i915_private *dev_priv,
                                    struct i915_power_well *power_well)
 {
-        enum i915_power_well_id power_well_id = power_well->id;
+        enum i915_power_well_id power_well_id = power_well->desc->id;
         bool enabled = false;
         u32 mask;
         u32 state;
@@ -1107,7 +1110,7 @@ lookup_power_well(struct drm_i915_private *dev_priv,
                 struct i915_power_well *power_well;
 
                 power_well = &power_domains->power_wells[i];
-                if (power_well->id == power_well_id)
+                if (power_well->desc->id == power_well_id)
                         return power_well;
         }
 
@@ -1146,7 +1149,7 @@ static void assert_chv_phy_status(struct drm_i915_private *dev_priv)
                                      PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 0) |
                                      PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 1));
 
-        if (cmn_bc->ops->is_enabled(dev_priv, cmn_bc)) {
+        if (cmn_bc->desc->ops->is_enabled(dev_priv, cmn_bc)) {
                 phy_status |= PHY_POWERGOOD(DPIO_PHY0);
 
                 /* this assumes override is only used to enable lanes */
@@ -1187,7 +1190,7 @@ static void assert_chv_phy_status(struct drm_i915_private *dev_priv)
                         phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH1, 1);
         }
 
-        if (cmn_d->ops->is_enabled(dev_priv, cmn_d)) {
+        if (cmn_d->desc->ops->is_enabled(dev_priv, cmn_d)) {
                 phy_status |= PHY_POWERGOOD(DPIO_PHY1);
 
                 /* this assumes override is only used to enable lanes */
@@ -1231,10 +1234,10 @@ static void chv_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv,
         enum pipe pipe;
         uint32_t tmp;
 
-        WARN_ON_ONCE(power_well->id != PUNIT_POWER_WELL_DPIO_CMN_BC &&
-                     power_well->id != PUNIT_POWER_WELL_DPIO_CMN_D);
+        WARN_ON_ONCE(power_well->desc->id != PUNIT_POWER_WELL_DPIO_CMN_BC &&
+                     power_well->desc->id != PUNIT_POWER_WELL_DPIO_CMN_D);
 
-        if (power_well->id == PUNIT_POWER_WELL_DPIO_CMN_BC) {
+        if (power_well->desc->id == PUNIT_POWER_WELL_DPIO_CMN_BC) {
                 pipe = PIPE_A;
                 phy = DPIO_PHY0;
         } else {
@@ -1262,7 +1265,7 @@ static void chv_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv,
                 DPIO_SUS_CLK_CONFIG_GATE_CLKREQ;
         vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW28, tmp);
 
-        if (power_well->id == PUNIT_POWER_WELL_DPIO_CMN_BC) {
+        if (power_well->desc->id == PUNIT_POWER_WELL_DPIO_CMN_BC) {
                 tmp = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW6_CH1);
                 tmp |= DPIO_DYNPWRDOWNEN_CH1;
                 vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW6_CH1, tmp);
@@ -1293,10 +1296,10 @@ static void chv_dpio_cmn_power_well_disable(struct drm_i915_private *dev_priv,
 {
         enum dpio_phy phy;
 
-        WARN_ON_ONCE(power_well->id != PUNIT_POWER_WELL_DPIO_CMN_BC &&
-                     power_well->id != PUNIT_POWER_WELL_DPIO_CMN_D);
+        WARN_ON_ONCE(power_well->desc->id != PUNIT_POWER_WELL_DPIO_CMN_BC &&
+                     power_well->desc->id != PUNIT_POWER_WELL_DPIO_CMN_D);
 
-        if (power_well->id == PUNIT_POWER_WELL_DPIO_CMN_BC) {
+        if (power_well->desc->id == PUNIT_POWER_WELL_DPIO_CMN_BC) {
                 phy = DPIO_PHY0;
                 assert_pll_disabled(dev_priv, PIPE_A);
                 assert_pll_disabled(dev_priv, PIPE_B);
@@ -2051,7 +2054,7 @@ static const struct i915_power_well_ops chv_dpio_cmn_power_well_ops = {
         .is_enabled = vlv_power_well_enabled,
 };
 
-static struct i915_power_well i9xx_always_on_power_well[] = {
+static const struct i915_power_well_desc i9xx_always_on_power_well[] = {
         {
                 .name = "always-on",
                 .always_on = 1,
@@ -2068,7 +2071,7 @@ static const struct i915_power_well_ops i830_pipes_power_well_ops = {
         .is_enabled = i830_pipes_power_well_enabled,
 };
 
-static struct i915_power_well i830_power_wells[] = {
+static const struct i915_power_well_desc i830_power_wells[] = {
         {
                 .name = "always-on",
                 .always_on = 1,
@@ -2105,7 +2108,7 @@ static const struct i915_power_well_ops bxt_dpio_cmn_power_well_ops = {
         .is_enabled = bxt_dpio_cmn_power_well_enabled,
 };
 
-static struct i915_power_well hsw_power_wells[] = {
+static const struct i915_power_well_desc hsw_power_wells[] = {
         {
                 .name = "always-on",
                 .always_on = 1,
@@ -2124,7 +2127,7 @@ static struct i915_power_well hsw_power_wells[] = {
         },
 };
 
-static struct i915_power_well bdw_power_wells[] = {
+static const struct i915_power_well_desc bdw_power_wells[] = {
         {
                 .name = "always-on",
                 .always_on = 1,
@@ -2165,7 +2168,7 @@ static const struct i915_power_well_ops vlv_dpio_power_well_ops = {
         .is_enabled = vlv_power_well_enabled,
 };
 
-static struct i915_power_well vlv_power_wells[] = {
+static const struct i915_power_well_desc vlv_power_wells[] = {
         {
                 .name = "always-on",
                 .always_on = 1,
@@ -2223,7 +2226,7 @@ static struct i915_power_well vlv_power_wells[] = {
         },
 };
 
-static struct i915_power_well chv_power_wells[] = {
+static const struct i915_power_well_desc chv_power_wells[] = {
         {
                 .name = "always-on",
                 .always_on = 1,
@@ -2263,12 +2266,12 @@ bool intel_display_power_well_is_enabled(struct drm_i915_private *dev_priv,
         bool ret;
 
         power_well = lookup_power_well(dev_priv, power_well_id);
-        ret = power_well->ops->is_enabled(dev_priv, power_well);
+        ret = power_well->desc->ops->is_enabled(dev_priv, power_well);
 
         return ret;
 }
 
-static struct i915_power_well skl_power_wells[] = {
+static const struct i915_power_well_desc skl_power_wells[] = {
         {
                 .name = "always-on",
                 .always_on = 1,
@@ -2336,7 +2339,7 @@ static struct i915_power_well skl_power_wells[] = {
         },
 };
 
-static struct i915_power_well bxt_power_wells[] = {
+static const struct i915_power_well_desc bxt_power_wells[] = {
         {
                 .name = "always-on",
                 .always_on = 1,
@@ -2390,7 +2393,7 @@ static struct i915_power_well bxt_power_wells[] = {
         },
 };
 
-static struct i915_power_well glk_power_wells[] = {
+static const struct i915_power_well_desc glk_power_wells[] = {
         {
                 .name = "always-on",
                 .always_on = 1,
@@ -2490,7 +2493,7 @@ static struct i915_power_well glk_power_wells[] = {
         },
 };
 
-static struct i915_power_well cnl_power_wells[] = {
+static const struct i915_power_well_desc cnl_power_wells[] = {
         {
                 .name = "always-on",
                 .always_on = 1,
@@ -2594,7 +2597,7 @@ static const struct i915_power_well_ops icl_combo_phy_aux_power_well_ops = {
         .is_enabled = hsw_power_well_enabled,
 };
 
-static struct i915_power_well icl_power_wells[] = {
+static const struct i915_power_well_desc icl_power_wells[] = {
         {
                 .name = "always-on",
                 .always_on = 1,
@@ -2805,26 +2808,38 @@ static uint32_t get_allowed_dc_mask(const struct drm_i915_private *dev_priv,
         return mask;
 }
 
-static void assert_power_well_ids_unique(struct drm_i915_private *dev_priv)
+static int
+__set_power_wells(struct i915_power_domains *power_domains,
+                  const struct i915_power_well_desc *power_well_descs,
+                  int power_well_count)
 {
-        struct i915_power_domains *power_domains = &dev_priv->power_domains;
-        u64 power_well_ids;
+        u64 power_well_ids = 0;
         int i;
 
-        power_well_ids = 0;
-        for (i = 0; i < power_domains->power_well_count; i++) {
-                enum i915_power_well_id id = power_domains->power_wells[i].id;
+        power_domains->power_well_count = power_well_count;
+        power_domains->power_wells =
+                                kcalloc(power_well_count,
+                                        sizeof(*power_domains->power_wells),
+                                        GFP_KERNEL);
+        if (!power_domains->power_wells)
+                return -ENOMEM;
+
+        for (i = 0; i < power_well_count; i++) {
+                enum i915_power_well_id id = power_well_descs[i].id;
+
+                power_domains->power_wells[i].desc = &power_well_descs[i];
 
                 WARN_ON(id >= sizeof(power_well_ids) * 8);
                 WARN_ON(power_well_ids & BIT_ULL(id));
                 power_well_ids |= BIT_ULL(id);
         }
+
+        return 0;
 }
 
-#define set_power_wells(power_domains, __power_wells) ({                \
-        (power_domains)->power_wells = (__power_wells);                 \
-        (power_domains)->power_well_count = ARRAY_SIZE(__power_wells);  \
-})
+#define set_power_wells(power_domains, __power_well_descs) \
+        __set_power_wells(power_domains, __power_well_descs, \
+                          ARRAY_SIZE(__power_well_descs))
 
 /**
  * intel_power_domains_init - initializes the power domain structures
@@ -2836,6 +2851,7 @@ static void assert_power_well_ids_unique(struct drm_i915_private *dev_priv)
 int intel_power_domains_init(struct drm_i915_private *dev_priv)
 {
         struct i915_power_domains *power_domains = &dev_priv->power_domains;
+        int err;
 
         i915_modparams.disable_power_well =
                 sanitize_disable_power_well_option(dev_priv,
@@ -2852,15 +2868,15 @@ int intel_power_domains_init(struct drm_i915_private *dev_priv)
          * the disabling order is reversed.
          */
         if (IS_ICELAKE(dev_priv)) {
-                set_power_wells(power_domains, icl_power_wells);
+                err = set_power_wells(power_domains, icl_power_wells);
         } else if (IS_HASWELL(dev_priv)) {
-                set_power_wells(power_domains, hsw_power_wells);
+                err = set_power_wells(power_domains, hsw_power_wells);
         } else if (IS_BROADWELL(dev_priv)) {
-                set_power_wells(power_domains, bdw_power_wells);
+                err = set_power_wells(power_domains, bdw_power_wells);
         } else if (IS_GEN9_BC(dev_priv)) {
-                set_power_wells(power_domains, skl_power_wells);
+                err = set_power_wells(power_domains, skl_power_wells);
         } else if (IS_CANNONLAKE(dev_priv)) {
-                set_power_wells(power_domains, cnl_power_wells);
+                err = set_power_wells(power_domains, cnl_power_wells);
 
                 /*
                  * DDI and Aux IO are getting enabled for all ports
@@ -2872,22 +2888,31 @@ int intel_power_domains_init(struct drm_i915_private *dev_priv)
                         power_domains->power_well_count -= 2;
 
         } else if (IS_BROXTON(dev_priv)) {
-                set_power_wells(power_domains, bxt_power_wells);
+                err = set_power_wells(power_domains, bxt_power_wells);
         } else if (IS_GEMINILAKE(dev_priv)) {
-                set_power_wells(power_domains, glk_power_wells);
+                err = set_power_wells(power_domains, glk_power_wells);
         } else if (IS_CHERRYVIEW(dev_priv)) {
-                set_power_wells(power_domains, chv_power_wells);
+                err = set_power_wells(power_domains, chv_power_wells);
         } else if (IS_VALLEYVIEW(dev_priv)) {
-                set_power_wells(power_domains, vlv_power_wells);
+                err = set_power_wells(power_domains, vlv_power_wells);
         } else if (IS_I830(dev_priv)) {
-                set_power_wells(power_domains, i830_power_wells);
+                err = set_power_wells(power_domains, i830_power_wells);
         } else {
-                set_power_wells(power_domains, i9xx_always_on_power_well);
+                err = set_power_wells(power_domains, i9xx_always_on_power_well);
         }
 
-        assert_power_well_ids_unique(dev_priv);
+        return err;
+}
 
-        return 0;
+/**
+ * intel_power_domains_cleanup - clean up power domains resources
+ * @dev_priv: i915 device instance
+ *
+ * Release any resources acquired by intel_power_domains_init()
+ */
+void intel_power_domains_cleanup(struct drm_i915_private *dev_priv)
+{
+        kfree(dev_priv->power_domains.power_wells);
 }
 
 static void intel_power_domains_sync_hw(struct drm_i915_private *dev_priv)
@@ -2897,9 +2922,9 @@ static void intel_power_domains_sync_hw(struct drm_i915_private *dev_priv)
 
         mutex_lock(&power_domains->lock);
         for_each_power_well(dev_priv, power_well) {
-                power_well->ops->sync_hw(dev_priv, power_well);
-                power_well->hw_enabled = power_well->ops->is_enabled(dev_priv,
-                                                                     power_well);
+                power_well->desc->ops->sync_hw(dev_priv, power_well);
+                power_well->hw_enabled =
+                        power_well->desc->ops->is_enabled(dev_priv, power_well);
         }
         mutex_unlock(&power_domains->lock);
 }
@@ -3398,7 +3423,7 @@ static void chv_phy_control_init(struct drm_i915_private *dev_priv)
          * override and set the lane powerdown bits accding to the
          * current lane status.
          */
-        if (cmn_bc->ops->is_enabled(dev_priv, cmn_bc)) {
+        if (cmn_bc->desc->ops->is_enabled(dev_priv, cmn_bc)) {
                 uint32_t status = I915_READ(DPLL(PIPE_A));
                 unsigned int mask;
 
@@ -3429,7 +3454,7 @@ static void chv_phy_control_init(struct drm_i915_private *dev_priv)
                 dev_priv->chv_phy_assert[DPIO_PHY0] = true;
         }
 
-        if (cmn_d->ops->is_enabled(dev_priv, cmn_d)) {
+        if (cmn_d->desc->ops->is_enabled(dev_priv, cmn_d)) {
                 uint32_t status = I915_READ(DPIO_PHY_STATUS);
                 unsigned int mask;
 
@@ -3465,15 +3490,15 @@ static void vlv_cmnlane_wa(struct drm_i915_private *dev_priv)
                 lookup_power_well(dev_priv, PUNIT_POWER_WELL_DISP2D);
 
         /* If the display might be already active skip this */
-        if (cmn->ops->is_enabled(dev_priv, cmn) &&
-            disp2d->ops->is_enabled(dev_priv, disp2d) &&
+        if (cmn->desc->ops->is_enabled(dev_priv, cmn) &&
+            disp2d->desc->ops->is_enabled(dev_priv, disp2d) &&
             I915_READ(DPIO_CTL) & DPIO_CMNRST)
                 return;
 
         DRM_DEBUG_KMS("toggling display PHY side reset\n");
 
         /* cmnlane needs DPLL registers */
-        disp2d->ops->enable(dev_priv, disp2d);
+        disp2d->desc->ops->enable(dev_priv, disp2d);
 
         /*
          * From VLV2A0_DP_eDP_HDMI_DPIO_driver_vbios_notes_11.docx:
@@ -3482,7 +3507,7 @@ static void vlv_cmnlane_wa(struct drm_i915_private *dev_priv)
          * Simply ungating isn't enough to reset the PHY enough to get
          * ports and lanes running.
          */
-        cmn->ops->disable(dev_priv, cmn);
+        cmn->desc->ops->disable(dev_priv, cmn);
 }
 
 /**
@@ -3598,9 +3623,9 @@ static void intel_power_domains_dump_info(struct drm_i915_private *dev_priv)
                 enum intel_display_power_domain domain;
 
                 DRM_DEBUG_DRIVER("%-25s %d\n",
-                                 power_well->name, power_well->count);
+                                 power_well->desc->name, power_well->count);
 
-                for_each_power_domain(domain, power_well->domains)
+                for_each_power_domain(domain, power_well->desc->domains)
                         DRM_DEBUG_DRIVER("  %-23s %d\n",
                                          intel_display_power_domain_str(domain),
                                          power_domains->domain_use_count[domain]);
@@ -3636,22 +3661,25 @@ void intel_power_domains_verify_state(struct drm_i915_private *dev_priv)
                  * and PW1 power wells) are under FW control, so ignore them,
                  * since their state can change asynchronously.
                  */
-                if (!power_well->domains)
+                if (!power_well->desc->domains)
                         continue;
 
-                enabled = power_well->ops->is_enabled(dev_priv, power_well);
-                if ((power_well->count || power_well->always_on) != enabled)
+                enabled = power_well->desc->ops->is_enabled(dev_priv,
+                                                            power_well);
+                if ((power_well->count || power_well->desc->always_on) !=
+                    enabled)
                         DRM_ERROR("power well %s state mismatch (refcount %d/enabled %d)",
-                                  power_well->name, power_well->count, enabled);
+                                  power_well->desc->name,
+                                  power_well->count, enabled);
 
                 domains_count = 0;
-                for_each_power_domain(domain, power_well->domains)
+                for_each_power_domain(domain, power_well->desc->domains)
                         domains_count += power_domains->domain_use_count[domain];
 
                 if (power_well->count != domains_count) {
                         DRM_ERROR("power well %s refcount/domain refcount mismatch "
                                   "(refcount %d/domains refcount %d)\n",
-                                  power_well->name, power_well->count,
+                                  power_well->desc->name, power_well->count,
                                   domains_count);
                         dump_domain_info = true;
                 }