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drm/i915/gt: Flush before changing register state

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commit d5109f739c9f14a3bda249cb48b16de1065932f0 upstream.

Flush; invalidate; change registers; invalidate; flush.

Will this finally work on every device? Or will Baytrail complain again?

On the positive side, we immediately see the benefit of having hsw-gt1 in
CI.

Fixes: ace44e13e577 ("drm/i915/gt: Clear CACHE_MODE prior to clearing residuals")
Testcase: igt/gem_render_tiled_blits # hsw-gt1
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: Akeem G Abodunrin <akeem.g.abodunrin@intel.com>
Acked-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210125220247.31701-1-chris@chris-wilson.co.uk
(cherry picked from commit d30bbd62b1bfd9e0a33c3583c5a9e5d66f60cbd7)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Diego Calleja <diegocg@gmail.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Chris Wilson 2021-01-25 22:02:47 +00:00 committed by Greg Kroah-Hartman
parent de3ea5be51
commit 6bb73b704d
1 changed files with 1 additions and 0 deletions
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1
drivers/gpu/drm/i915/gt/gen7_renderclear.c
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@ -393,6 +393,7 @@ static void emit_batch(struct i915_vma * const vma,
desc_count);
/* Reset inherited context registers */
gen7_emit_pipeline_flush(&cmds);
gen7_emit_pipeline_invalidate(&cmds);
batch_add(&cmds, MI_LOAD_REGISTER_IMM(2));
batch_add(&cmds, i915_mmio_reg_offset(CACHE_MODE_0_GEN7));