i965: Flush the RC and TC before doing a fast clear resolve
The docs say "When performing a render target resolve, PIPE_CONTROL with end of pipe sync must be delivered.", which doesn't actually tell us whether we need to do it before or after. Blorp did it before and after, and doing it before certainly makes sense. The resolve operation needs to read from the MCS and if we don't flush the render cache it won't get up-to-date data. On the other hand, doing it after should not be necessary, since we call brw_render_cache_set_check_flush() after the resolve. Fixes rendering corruption in kwin's cover switch effect and various steam games. Missing flush spotted by Ken. Reviewed-by: Kenneth Graunke <kenneth@whitecape.org> Reviewed-by: Chris Forbes <chrisf@ijw.co.nz> Signed-off-by: Kristian Høgsberg <krh@bitplanet.net>
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@ -661,6 +661,8 @@ brw_meta_resolve_color(struct brw_context *brw,
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GLuint fbo, rbo;
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struct rect rect;
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intel_batchbuffer_emit_mi_flush(brw);
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_mesa_meta_begin(ctx, MESA_META_ALL);
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_mesa_GenFramebuffers(1, &fbo);
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@ -693,8 +695,6 @@ brw_meta_resolve_color(struct brw_context *brw,
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_mesa_meta_end(ctx);
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intel_batchbuffer_emit_mi_flush(brw);
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/* We're typically called from intel_update_state() and we're supposed to
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* return with the state all updated to what it was before
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* brw_meta_resolve_color() was called. The meta rendering will have
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