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drm/i915/tgl: Disable read-only ppgtt support

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The same read-only affliction as befell Icelake is affecting Tigerlake.
Disable the read-only support as clearly it was not fixed.

Testcase: igt/i915_selftests/live_gem_context
References: 3936867dbc1e ("drm/i915: Disable read only ppgtt support for gen11")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190911125717.28997-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2019-09-11 13:57:17 +01:00
parent cfcbfdd8fe
commit 7cb8468bbe
1 changed files with 3 additions and 1 deletions
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4
drivers/gpu/drm/i915/i915_gem_gtt.c
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@ -1486,8 +1486,10 @@ static struct i915_ppgtt *gen8_ppgtt_create(struct drm_i915_private *i915)
*
* Gen11 has HSDES#:1807136187 unresolved. Disable ro support
* for now.
*
* Gen12 has inherited the same read-only fault issue from gen11.
*/
ppgtt->vm.has_read_only = INTEL_GEN(i915) != 11;
ppgtt->vm.has_read_only = !IS_GEN_RANGE(i915, 11, 12);
/* There are only few exceptions for gen >=6. chv and bxt.
* And we are not sure about the latter so play safe for now.