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drm/i915: Catch non-existent registers in find_fw_domain

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Add WARN_ON to find_fw_domain to registers related to uninitialized
hardware.

v2:
- Print the uninitialized domains and register (Chris)

Cc: Imre Deak <imre.deak@intel.com>
Cc: Wang Elaine <elaine.wang@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/1481120559-17413-1-git-send-email-joonas.lahtinen@linux.intel.com
This commit is contained in:
Joonas Lahtinen 2016-12-07 16:22:39 +02:00
parent 73f67aa8cc
commit 991914274b
1 changed files with 8 additions and 1 deletions
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9
drivers/gpu/drm/i915/intel_uncore.c
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@ -625,7 +625,14 @@ find_fw_domain(struct drm_i915_private *dev_priv, u32 offset)
dev_priv->uncore.fw_domains_table_entries, dev_priv->uncore.fw_domains_table_entries,
fw_range_cmp); fw_range_cmp);
return entry ? entry->domains : 0; if (!entry)
return 0;
WARN(entry->domains & ~dev_priv->uncore.fw_domains,
"Uninitialized forcewake domain(s) 0x%x accessed at 0x%x\n",
entry->domains & ~dev_priv->uncore.fw_domains, offset);
return entry->domains;
} }
static void static void