[Mesa-dev] [PATCH 1/5] r600g/compute: always CONTEXT_CONTROL packet at start of CS

[alexdeucher at gmail.com]

From: Alex Deucher <alexander.deucher at amd.com>

It's required.  The CP uses this to properly allocate new
contexts.  Also do a CS partial flush since we are updating
CONFIG regs which are single state.

Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 src/gallium/drivers/r600/evergreen_compute.c |    9 +++++++++
 src/gallium/drivers/r600/evergreend.h        |    1 +
 2 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/src/gallium/drivers/r600/evergreen_compute.c b/src/gallium/drivers/r600/evergreen_compute.c
index 655cf75..55906c9 100644
--- a/src/gallium/drivers/r600/evergreen_compute.c
+++ b/src/gallium/drivers/r600/evergreen_compute.c
@@ -626,6 +626,15 @@ void evergreen_init_atom_start_compute_cs(struct r600_context *ctx)
 	r600_init_command_buffer(cb, 256);
 	cb->pkt_flags = RADEON_CP_PACKET3_COMPUTE_MODE;
 
+	/* This must be first. */
+	r600_store_value(cb, PKT3(PKT3_CONTEXT_CONTROL, 1, 0));
+	r600_store_value(cb, 0x80000000);
+	r600_store_value(cb, 0x80000000);
+
+	/* We're setting config registers here. */
+	r600_store_value(cb, PKT3(PKT3_EVENT_WRITE, 0, 0));
+	r600_store_value(cb, EVENT_TYPE(EVENT_TYPE_CS_PARTIAL_FLUSH) | EVENT_INDEX(4));
+
 	switch (ctx->family) {
 	case CHIP_CEDAR:
 	default:
diff --git a/src/gallium/drivers/r600/evergreend.h b/src/gallium/drivers/r600/evergreend.h
index d10ec7f..98df83d 100644
--- a/src/gallium/drivers/r600/evergreend.h
+++ b/src/gallium/drivers/r600/evergreend.h
@@ -43,6 +43,7 @@
 #define EVERGREEN_CTL_CONST_OFFSET                  0x0003CFF0
 #define EVERGREEN_CTL_CONST_END                     0x0003FF0C
 
+#define EVENT_TYPE_CS_PARTIAL_FLUSH            0x07
 #define EVENT_TYPE_PS_PARTIAL_FLUSH            0x10
 #define EVENT_TYPE_ZPASS_DONE                  0x15
 #define EVENT_TYPE_CACHE_FLUSH_AND_INV_EVENT   0x16
-- 
1.7.7.5