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drm/i915: Disable MI_STORE_DATA_IMM for i915g/i915gm

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The early gen3 machines (i915g/Grantsdale and i915gm/Alviso) share a lot
of characteristics in their MI/GTT blocks with gen2, and in particular
can only use physical addresses in MI_STORE_DATA_IMM. This makes it
incompatible with our usage, so include those two machines in the
blacklist to prevent usage.

v2: Make it easy for gcc and rewrite it as a switch to save some space.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> #v1
Link: https://patchwork.freedesktop.org/patch/msgid/20170906152859.5304-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson
2017-09-06 16:28:59 +01:00
parent 0db8c96120
commit 90cad095ee
4 changed files with 20 additions and 21 deletions
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12
drivers/gpu/drm/i915/intel_ringbuffer.h
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@@ -735,16 +735,6 @@ bool intel_engines_are_idle(struct drm_i915_private *dev_priv);
void intel_engines_mark_idle(struct drm_i915_private *i915);
void intel_engines_reset_default_submission(struct drm_i915_private *i915);
static inline bool
__intel_engine_can_store_dword(unsigned int gen, unsigned int class)
{
if (gen <= 2)
return false; /* uses physical not virtual addresses */
if (gen == 6 && class == VIDEO_DECODE_CLASS)
return false; /* b0rked */
return true;
}
bool intel_engine_can_store_dword(struct intel_engine_cs *engine);
#endif /* _INTEL_RINGBUFFER_H_ */