From: Arun Siluvery Date: Fri, 19 Jun 2015 17:37:11 +0000 (+0100) Subject: drm/i915/gen8: Re-order init pipe_control in lrc mode X-Git-Tag: firefly_0821_release~176^2~721^2~33^2~448 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=c4db7599194248214b343d1ef1a1bc53d6cff187;p=firefly-linux-kernel-4.4.55.git drm/i915/gen8: Re-order init pipe_control in lrc mode 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. v2: Check for valid scratch page before initializing WA as some of them perform writes to it. Cc: Chris Wilson Cc: Dave Gordon Signed-off-by: Michel Thierry Signed-off-by: Arun Siluvery Reviewed-by: Chris Wilson Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c index 9b791a3d47dd..f83d97ea4028 100644 --- a/drivers/gpu/drm/i915/intel_lrc.c +++ b/drivers/gpu/drm/i915/intel_lrc.c @@ -1224,6 +1224,12 @@ static int intel_init_workaround_bb(struct intel_engine_cs *ring) WARN_ON(ring->id != RCS); + /* some WA perform writes to scratch page, ensure it is valid */ + if (ring->scratch.obj == NULL) { + DRM_ERROR("scratch page not allocated for %s\n", ring->name); + return -EINVAL; + } + ret = lrc_setup_wa_ctx_obj(ring, PAGE_SIZE); if (ret) { DRM_DEBUG_DRIVER("Failed to setup context WA page: %d\n", ret); @@ -1658,7 +1664,8 @@ static int logical_render_ring_init(struct drm_device *dev) ring->emit_bb_start = gen8_emit_bb_start; ring->dev = dev; - ret = logical_ring_init(dev, ring); + + ret = intel_init_pipe_control(ring); if (ret) return ret; @@ -1673,9 +1680,10 @@ static int logical_render_ring_init(struct drm_device *dev) ret); } - ret = intel_init_pipe_control(ring); - if (ret) + ret = logical_ring_init(dev, ring); + if (ret) { lrc_destroy_wa_ctx_obj(ring); + } return ret; }