nvc0: add conservative rasterization support

Subpixel precision bias, dilation and the post-snap mode are supported on
GM200 and newer. The pre-snap mode is supported for triangle primitives on
GP100.

Signed-off-by: Rhys Perry <[email protected]>
Reviewed-by: Ilia Mirkin <[email protected]>

2 files changed, 51 insertions, 0 deletions

diff --git a/src/gallium/drivers/nouveau/nvc0/mme/com9097.mme b/src/gallium/drivers/nouveau/nvc0/mme/com9097.mme
index 7c5ec8f52b9..ecf99606672 100644
--- a/src/gallium/drivers/nouveau/nvc0/mme/com9097.mme
+++ b/src/gallium/drivers/nouveau/nvc0/mme/com9097.mme
@@ -550,3 +550,33 @@ qbw_postclamp:
 qbw_done:
    exit send (extrinsrt 0x0 $r4 0x0 0x10 0x10)
    maddrsend 0x44
+
+/* NVC0_3D_MACRO_CONSERVATIVE_RASTER_STATE:
+ *
+ * This sets basically all the conservative rasterization state. It sets
+ * CONSERVATIVE_RASTER to one while doing so.
+ *
+ * arg = biasx | biasy<<4 | (dilation*4)<<8 | mode<<10
+ */
+.section #mme9097_conservative_raster_state
+   /* Mode and dilation */
+   maddr 0x1d00 /* SCRATCH[0] */
+   send 0x0 /* unknown */
+   send (extrinsrt 0x0 $r1 8 3 23) /* value */
+   mov $r2 0x7
+   send (extrinsrt 0x0 $r2 0 3 23) /* write mask */
+   maddr 0x18c4 /* FIRMWARE[4] */
+   mov $r2 0x831
+   send (extrinsrt 0x0 $r2 0 12 11) /* sends 0x418800 */
+   /* Subpixel precision */
+   mov $r2 (extrinsrt 0x0 $r1 0 3 0)
+   mov $r2 (extrinsrt $r2 $r1 4 4 8)
+   maddr 0x8287 /* SUBPIXEL_PRECISION[0] (incrementing by 8 methods) */
+   mov $r3 16 /* loop counter */
+crs_loop:
+   mov $r3 (add $r3 -1)
+   branz $r3 #crs_loop
+   send $r2
+   /* Enable */
+   exit maddr 0x1452 /* CONSERVATIVE_RASTER */
+   send 0x1
diff --git a/src/gallium/drivers/nouveau/nvc0/mme/com9097.mme.h b/src/gallium/drivers/nouveau/nvc0/mme/com9097.mme.h
index 9618da6e28c..3eacda9a27a 100644
--- a/src/gallium/drivers/nouveau/nvc0/mme/com9097.mme.h
+++ b/src/gallium/drivers/nouveau/nvc0/mme/com9097.mme.h
@@ -373,3 +373,24 @@ uint32_t mme9097_query_buffer_write[] = {
 	0x840100c2,
 	0x00110071,
 };
+
+uint32_t mme9097_conservative_raster_state[] = {
+	0x07400021,
+	0x00000041,
+	0xb8d04042,
+/* 0x000c: crs_loop */
+	0x0001c211,
+	0xb8c08042,
+	0x06310021,
+	0x020c4211,
+	0x5b008042,
+	0x00c04212,
+	0x41085212,
+	0x20a1c021,
+	0x00040311,
+	0xffffdb11,
+	0xffffd817,
+	0x00001041,
+	0x051480a1,
+	0x00004041,
+};