From 933faae2b8669f459e7ab27d6bcbfb6f4136b6d5 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Marek=20Ol=C5=A1=C3=A1k?= <maraeo@gmail.com>
Date: Tue, 25 Sep 2012 03:11:22 +0200
Subject: [PATCH] r600g: flush FMASK and CMASK when changing colorbuffers on
 Evergreen

This fixes rare graphical corruption.

NOTE: This is a candidate for the stable branches.
---
 src/gallium/drivers/r600/evergreen_state.c      | 4 ++++
 src/gallium/drivers/r600/r600.h                 | 1 +
 src/gallium/drivers/r600/r600_hw_context.c      | 6 ++++++
 src/gallium/drivers/r600/r600_hw_context_priv.h | 2 +-
 src/gallium/drivers/r600/r600_state.c           | 5 +++++
 src/gallium/drivers/r600/r600d.h                | 1 +
 6 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/src/gallium/drivers/r600/evergreen_state.c b/src/gallium/drivers/r600/evergreen_state.c
index 98dbb2f5e69..7bedfec0503 100644
--- a/src/gallium/drivers/r600/evergreen_state.c
+++ b/src/gallium/drivers/r600/evergreen_state.c
@@ -1458,6 +1458,10 @@ static void evergreen_set_framebuffer_state(struct pipe_context *ctx,
 
 	if (rctx->framebuffer.state.nr_cbufs) {
 		rctx->flags |= R600_CONTEXT_CB_FLUSH;
+
+		if (rctx->framebuffer.state.cbufs[0]->texture->nr_samples > 1) {
+			rctx->flags |= R600_CONTEXT_FLUSH_AND_INV_CB_META;
+		}
 	}
 	if (rctx->framebuffer.state.zsbuf) {
 		rctx->flags |= R600_CONTEXT_DB_FLUSH;
diff --git a/src/gallium/drivers/r600/r600.h b/src/gallium/drivers/r600/r600.h
index 83d21a42a92..7d434169d9e 100644
--- a/src/gallium/drivers/r600/r600.h
+++ b/src/gallium/drivers/r600/r600.h
@@ -190,6 +190,7 @@ struct r600_so_target {
 #define R600_CONTEXT_WAIT_IDLE			(1 << 7)
 #define R600_CONTEXT_FLUSH_AND_INV		(1 << 8)
 #define R600_CONTEXT_HTILE_ERRATA		(1 << 9)
+#define R600_CONTEXT_FLUSH_AND_INV_CB_META	(1 << 10)
 
 struct r600_context;
 struct r600_screen;
diff --git a/src/gallium/drivers/r600/r600_hw_context.c b/src/gallium/drivers/r600/r600_hw_context.c
index 38dd7b643ae..5b93d05573d 100644
--- a/src/gallium/drivers/r600/r600_hw_context.c
+++ b/src/gallium/drivers/r600/r600_hw_context.c
@@ -684,6 +684,12 @@ void r600_flush_emit(struct r600_context *rctx)
 		cs->buf[cs->cdw++] = EVENT_TYPE(EVENT_TYPE_PS_PARTIAL_FLUSH) | EVENT_INDEX(4);
 	}
 
+	if (rctx->chip_class >= R700 &&
+	    (rctx->flags & R600_CONTEXT_FLUSH_AND_INV_CB_META)) {
+		cs->buf[cs->cdw++] = PKT3(PKT3_EVENT_WRITE, 0, 0);
+		cs->buf[cs->cdw++] = EVENT_TYPE(EVENT_TYPE_FLUSH_AND_INV_CB_META) | EVENT_INDEX(0);
+	}
+
 	if (rctx->flags & R600_CONTEXT_FLUSH_AND_INV) {
 		cs->buf[cs->cdw++] = PKT3(PKT3_EVENT_WRITE, 0, 0);
 		cs->buf[cs->cdw++] = EVENT_TYPE(EVENT_TYPE_CACHE_FLUSH_AND_INV_EVENT) | EVENT_INDEX(0);
diff --git a/src/gallium/drivers/r600/r600_hw_context_priv.h b/src/gallium/drivers/r600/r600_hw_context_priv.h
index 83474b016f4..85fd74dce92 100644
--- a/src/gallium/drivers/r600/r600_hw_context_priv.h
+++ b/src/gallium/drivers/r600/r600_hw_context_priv.h
@@ -29,7 +29,7 @@
 #include "r600_pipe.h"
 
 /* the number of CS dwords for flushing and drawing */
-#define R600_MAX_FLUSH_CS_DWORDS 44
+#define R600_MAX_FLUSH_CS_DWORDS 46
 #define R600_MAX_DRAW_CS_DWORDS 34
 
 /* these flags are used in register flags and added into block flags */
diff --git a/src/gallium/drivers/r600/r600_state.c b/src/gallium/drivers/r600/r600_state.c
index 1b7869c3e65..60c861fc8e0 100644
--- a/src/gallium/drivers/r600/r600_state.c
+++ b/src/gallium/drivers/r600/r600_state.c
@@ -1456,6 +1456,11 @@ static void r600_set_framebuffer_state(struct pipe_context *ctx,
 
 	if (rctx->framebuffer.state.nr_cbufs) {
 		rctx->flags |= R600_CONTEXT_CB_FLUSH;
+
+		if (rctx->chip_class >= R700 &&
+		    rctx->framebuffer.state.cbufs[0]->texture->nr_samples > 1) {
+			rctx->flags |= R600_CONTEXT_FLUSH_AND_INV_CB_META;
+		}
 	}
 	if (rctx->framebuffer.state.zsbuf) {
 		rctx->flags |= R600_CONTEXT_DB_FLUSH;
diff --git a/src/gallium/drivers/r600/r600d.h b/src/gallium/drivers/r600/r600d.h
index cf0059a4b36..4b46bd7613a 100644
--- a/src/gallium/drivers/r600/r600d.h
+++ b/src/gallium/drivers/r600/r600d.h
@@ -119,6 +119,7 @@
 #define EVENT_TYPE_CACHE_FLUSH_AND_INV_EVENT   0x16
 #define EVENT_TYPE_SO_VGTSTREAMOUT_FLUSH	0x1f
 #define EVENT_TYPE_SAMPLE_STREAMOUTSTATS	0x20
+#define EVENT_TYPE_FLUSH_AND_INV_CB_META	46 /* supported on r700+ */
 #define		EVENT_TYPE(x)                           ((x) << 0)
 #define		EVENT_INDEX(x)                          ((x) << 8)
                 /* 0 - any non-TS event
-- 
2.30.2