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, 2 insertions, 2 deletions

diff --git a/drivers/gpu/drm/i915/intel_display.h b/drivers/gpu/drm/i915/intel_display.h
index 0a79a46d5805..6a28bac71128 100644
--- a/drivers/gpu/drm/i915/intel_display.h
+++ b/drivers/gpu/drm/i915/intel_display.h
@@ -329,11 +329,11 @@ struct intel_link_m_n {
 
 #define for_each_power_domain_well(__dev_priv, __power_well, __domain_mask)	\
 	for_each_power_well(__dev_priv, __power_well)				\
-		for_each_if((__power_well)->domains & (__domain_mask))
+		for_each_if((__power_well)->desc->domains & (__domain_mask))
 
 #define for_each_power_domain_well_rev(__dev_priv, __power_well, __domain_mask) \
 	for_each_power_well_rev(__dev_priv, __power_well)		        \
-		for_each_if((__power_well)->domains & (__domain_mask))
+		for_each_if((__power_well)->desc->domains & (__domain_mask))
 
 #define for_each_new_intel_plane_in_state(__state, plane, new_plane_state, __i) \
 	for ((__i) = 0; \