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drm/i915/gt: Use the kernel_context to measure the breadcrumb size
We set up a dummy ring in order to measure the size we require for our breadcrumb emission, so that we don't have to manually count dwords! We can pass in the kernel_context to use for this so that if required it is known for the breadcrumb emitter, and we can reuse some details from the kernel_context to reduce the number of temporaries we have to mock. 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/20200207125827.2787472-1-chris@chris-wilson.co.uk
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Chris Wilson
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Feb 7, 2020
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