Re: [PATCH v3 2/6] drm/i915/gen8: Re-order init pipe_control in lrc mode

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On 09/06/2015 16:27, Dave Gordon wrote:
On 05/06/15 11:34, Arun Siluvery wrote:
Some of the WA applied using WA batch buffers perform writes to scratch page.
In the current flow WA are initialized before scratch obj is allocated.
This patch reorders intel_init_pipe_control() to have a valid scratch obj
before we initialize WA.

Signed-off-by: Michel Thierry <michel.thierry@xxxxxxxxx>
Signed-off-by: Arun Siluvery <arun.siluvery@xxxxxxxxxxxxxxx>
---
  drivers/gpu/drm/i915/intel_lrc.c | 7 ++++++-
  1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index 0b3422a..20c56e4 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -1562,11 +1562,16 @@ static int logical_render_ring_init(struct drm_device *dev)
  	ring->emit_bb_start = gen8_emit_bb_start;

  	ring->dev = dev;
+
+	ret = intel_init_pipe_control(ring);
+	if (ret)
+		return ret;
+
  	ret = logical_ring_init(dev, ring);
  	if (ret)
  		return ret;

-	return intel_init_pipe_control(ring);
+	return 0;
  }

You could squash the last several lines down to just:

	return logical_ring_init(dev, ring);

.Dave.


yes but this is updated based on suggestion from Chris to allocate wa_ctx page during ring init itself; in the updated version it is not possible as we need to free that page also if ring_init fails. I sent the updated patches in the same series so as to collate all reviews instead of resending as a separate series.

regards
Arun




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