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drm/i915: Check for duplicated power well IDs

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Check that all the power well IDs are unique on the given platform.

v2:
- Fix using BIT_ULL() instead of BIT() for 64 bit mask.
v3:
- Move the check to a separate function. (Ville)

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170711204236.5618-4-imre.deak@intel.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Imre Deak 2017-07-11 23:42:33 +03:00 committed by Daniel Vetter
parent fb9248e202
commit 21792c6046
1 changed files with 18 additions and 0 deletions
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18
drivers/gpu/drm/i915/intel_runtime_pm.c
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@ -2548,6 +2548,22 @@ 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)
{
struct i915_power_domains *power_domains = &dev_priv->power_domains;
u64 power_well_ids;
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;
WARN_ON(id >= sizeof(power_well_ids) * 8);
WARN_ON(power_well_ids & BIT_ULL(id));
power_well_ids |= BIT_ULL(id);
}
}
#define set_power_wells(power_domains, __power_wells) ({ \
(power_domains)->power_wells = (__power_wells); \
(power_domains)->power_well_count = ARRAY_SIZE(__power_wells); \
@ -2599,6 +2615,8 @@ int intel_power_domains_init(struct drm_i915_private *dev_priv)
set_power_wells(power_domains, i9xx_always_on_power_well);
}
assert_power_well_ids_unique(dev_priv);
return 0;
}