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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - vkQuake flickering geometry under Intel"
href="https://bugs.freedesktop.org/show_bug.cgi?id=109630#c10">Comment # 10</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - vkQuake flickering geometry under Intel"
href="https://bugs.freedesktop.org/show_bug.cgi?id=109630">bug 109630</a>
from <span class="vcard"><a class="email" href="mailto:danylo.piliaiev@gmail.com" title="Danylo <danylo.piliaiev@gmail.com>"> <span class="fn">Danylo</span></a>
</span></b>
<pre>Ok, one more update:
A part of the dispatch which seems to lead to the issue is
MEDIA_INTERFACE_DESCRIPTOR_LOAD, commenting out everything unnecessary around
doesn't make flickering disappear, the moment MEDIA_INTERFACE_DESCRIPTOR_LOAD
is commented out - no flicker.
So the minimal reproduction will be commenting out the dispatch and adding this
at the start of cmd_buffer_flush_state:
if((cmd_buffer->state.gfx.dirty & ANV_CMD_DIRTY_PIPELINE) &&
cmd_buffer->state.compute.base.pipeline)
{
struct anv_pipeline *pipeline = cmd_buffer->state.compute.base.pipeline;
genX(flush_pipeline_select_gpgpu)(cmd_buffer);
cmd_buffer->state.pending_pipe_bits |= ANV_PIPE_CS_STALL_BIT;
genX(cmd_buffer_apply_pipe_flushes)(cmd_buffer);
anv_batch_emit_batch(&cmd_buffer->batch, &pipeline->batch);
struct anv_state state =
anv_cmd_buffer_alloc_dynamic_state(cmd_buffer,
GENX(INTERFACE_DESCRIPTOR_DATA_length), 64);
uint32_t size = GENX(INTERFACE_DESCRIPTOR_DATA_length) *
sizeof(uint32_t);
anv_batch_emit(&cmd_buffer->batch,
GENX(MEDIA_INTERFACE_DESCRIPTOR_LOAD), mid) {
mid.InterfaceDescriptorTotalLength = size;
mid.InterfaceDescriptorDataStartAddress = 0;
}
// Just to be sure...
cmd_buffer->state.gfx.dirty = ~0;
cmd_buffer->state.gfx.vb_dirty = ~0;
cmd_buffer->state.pending_pipe_bits = ~0;
cmd_buffer->state.descriptors_dirty = ~0;
cmd_buffer->state.push_constants_dirty = ~0;
}
Which produces the same issue.</pre>
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