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Commit e7778be1 authored by Thomas Daniel's avatar Thomas Daniel Committed by Daniel Vetter
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drm/i915: Fix startup failure in LRC mode after recent init changes 



A previous commit introduced engine init changes:

    commit 372ee59699d9 ("drm/i915: Only init engines once")

This broke execlists as intel_lr_context_render_state_init was trying to emit
commands to the RCS for the default context before the ring->init_hw was called.

Made a new gen8_init_rcs_context function and assign in to render ring
init_context.  Moved call to intel_logical_ring_workarounds_emit into
gen8_init_rcs_context to maintain previous functionality.

Moved call to render_state_init from lr_context_deferred_create into
gen8_init_rcs_context, and modified deferred_create to call ring->init_context
for non-default contexts.

Modified i915_gem_context_enable to call ring->init_context for the default
context.

So init_context will now always be called when the hw is ready - in
i915_gem_context_enable for the default context and in lr_context_deferred_create
for other contexts.

Signed-off-by: default avatarThomas Daniel <thomas.daniel@intel.com>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent d972d6ee

drivers/gpu/drm/i915/i915_gem_context.c

+18 −7
Original line number Diff line number Diff line
@@ -408,9 +408,20 @@ int i915_gem_context_enable(struct drm_i915_private *dev_priv) 


	BUG_ON(!dev_priv->ring[RCS].default_context);



	if (i915.enable_execlists)

		return 0;

	if (i915.enable_execlists) {

		for_each_ring(ring, dev_priv, i) {

			if (ring->init_context) {

				ret = ring->init_context(ring,

						ring->default_context);

				if (ret) {

					DRM_ERROR("ring init context: %d\n",

							ret);

					return ret;

				}

			}

		}



	} else

		for_each_ring(ring, dev_priv, i) {

			ret = i915_switch_context(ring, ring->default_context);

			if (ret)

drivers/gpu/drm/i915/intel_lrc.c

+19 −11
Original line number Diff line number Diff line
@@ -1336,6 +1336,18 @@ static int gen8_emit_request(struct intel_ringbuffer *ringbuf) 
	return 0;

}



static int gen8_init_rcs_context(struct intel_engine_cs *ring,

		       struct intel_context *ctx)

{

	int ret;



	ret = intel_logical_ring_workarounds_emit(ring, ctx);

	if (ret)

		return ret;



	return intel_lr_context_render_state_init(ring, ctx);

}



/**

 * intel_logical_ring_cleanup() - deallocate the Engine Command Streamer

 *
@@ -1409,7 +1421,7 @@ static int logical_render_ring_init(struct drm_device *dev) 
		ring->irq_keep_mask |= GT_RENDER_L3_PARITY_ERROR_INTERRUPT;



	ring->init_hw = gen8_init_render_ring;

	ring->init_context = intel_logical_ring_workarounds_emit;

	ring->init_context = gen8_init_rcs_context;

	ring->cleanup = intel_fini_pipe_control;

	ring->get_seqno = gen8_get_seqno;

	ring->set_seqno = gen8_set_seqno;
@@ -1904,21 +1916,17 @@ int intel_lr_context_deferred_create(struct intel_context *ctx, 


	if (ctx == ring->default_context)

		lrc_setup_hardware_status_page(ring, ctx_obj);



	if (ring->id == RCS && !ctx->rcs_initialized) {

	else if (ring->id == RCS && !ctx->rcs_initialized) {

		if (ring->init_context) {

			ret = ring->init_context(ring, ctx);

			if (ret)

				DRM_ERROR("ring init context: %d\n", ret);

		}



		ret = intel_lr_context_render_state_init(ring, ctx);

			if (ret) {

			DRM_ERROR("Init render state failed: %d\n", ret);

				DRM_ERROR("ring init context: %d\n", ret);

				ctx->engine[ring->id].ringbuf = NULL;

				ctx->engine[ring->id].state = NULL;

				goto error;

			}

		}



		ctx->rcs_initialized = true;

	}