vc4: Initial skeleton driver import.

This mostly just takes every draw call and turns it into a sequence of
commands that clear the FBO and draw a single shaded triangle to it,
regardless of the actual input vertices or shaders.  I copied the initial
driver skeleton mostly from freedreno, and I've preserved Rob Clark's
copyright for those.  I also based my initial hardcoded shaders and
command lists on Scott Mansell (phire)'s "hackdriver" project, though the
bit patterns of the shaders emitted end up being different.

v2: Rebase on gallium megadrivers changes.
v3: Rebase on PIPE_SHADER_CAP_MAX_CONSTS change.
v4: Rely on simpenrose actually being installed when building for
    simulation.
v5: Add more header duplicate-include guards.
v6: Apply Emil's review (protection against vc4 sim and ilo at the same
    time, and dropping the dricommon drm bits) and fix a copyright header
    (thanks, Roland)

1 files changed, 59 insertions, 0 deletions

diff --git a/src/gallium/drivers/vc4/vc4_emit.c b/src/gallium/drivers/vc4/vc4_emit.c
new file mode 100644
index 00000000000..9c41505288c
--- /dev/null
+++ b/src/gallium/drivers/vc4/vc4_emit.c
@@ -0,0 +1,59 @@
+/*
+ * Copyright © 2014 Broadcom
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include "vc4_context.h"
+
+void
+vc4_emit_state(struct pipe_context *pctx)
+{
+        struct vc4_context *vc4 = vc4_context(pctx);
+
+        if (vc4->dirty & VC4_DIRTY_SCISSOR) {
+                cl_u8(&vc4->bcl, VC4_PACKET_CLIP_WINDOW);
+                cl_u16(&vc4->bcl, vc4->scissor.minx);
+                cl_u16(&vc4->bcl, vc4->scissor.miny);
+                cl_u16(&vc4->bcl, vc4->scissor.maxx - vc4->scissor.minx);
+                cl_u16(&vc4->bcl, vc4->scissor.maxy - vc4->scissor.miny);
+        }
+
+        if (vc4->dirty & VC4_DIRTY_RASTERIZER) {
+                cl_u8(&vc4->bcl, VC4_PACKET_CONFIGURATION_BITS);
+                cl_u8(&vc4->bcl, vc4->rasterizer->config_bits[0]);
+                cl_u8(&vc4->bcl, vc4->rasterizer->config_bits[1]);
+                cl_u8(&vc4->bcl, vc4->rasterizer->config_bits[2]);
+        }
+
+        if (vc4->dirty & VC4_DIRTY_VIEWPORT) {
+                cl_u8(&vc4->bcl, VC4_PACKET_CLIPPER_XY_SCALING);
+                cl_f(&vc4->bcl, vc4->viewport.scale[0] * 16.0f);
+                cl_f(&vc4->bcl, vc4->viewport.scale[1] * 16.0f);
+
+                cl_u8(&vc4->bcl, VC4_PACKET_CLIPPER_Z_SCALING);
+                cl_f(&vc4->bcl, vc4->viewport.translate[2]);
+                cl_f(&vc4->bcl, vc4->viewport.scale[2]);
+
+                cl_u8(&vc4->bcl, VC4_PACKET_VIEWPORT_OFFSET);
+                cl_u16(&vc4->bcl, 16 * vc4->viewport.translate[0]);
+                cl_u16(&vc4->bcl, 16 * vc4->viewport.translate[1]);
+        }
+}