Mesa (master): r600g: add evergreen stencil support.

[Dave Airlie]

Module: Mesa
Branch: master
Commit: 9528fc2107d4cae39bc932c1943ffc57ebc92499
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=9528fc2107d4cae39bc932c1943ffc57ebc92499

Author: Dave Airlie <airlied at redhat.com>
Date:   Wed Oct  6 09:21:16 2010 +1000

r600g: add evergreen stencil support.

this sets the stencil up for evergreen properly.

---

 src/gallium/drivers/r600/eg_state_inlines.h |    8 ++++++++
 src/gallium/drivers/r600/evergreen_state.c  |   18 ++++++++++++++++--
 2 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/src/gallium/drivers/r600/eg_state_inlines.h b/src/gallium/drivers/r600/eg_state_inlines.h
index 8109490..d7a880f 100644
--- a/src/gallium/drivers/r600/eg_state_inlines.h
+++ b/src/gallium/drivers/r600/eg_state_inlines.h
@@ -276,6 +276,14 @@ static inline uint32_t r600_translate_dbformat(enum pipe_format format)
 	}
 }
 
+static inline uint32_t r600_translate_stencilformat(enum pipe_format format)
+{
+	if (format == PIPE_FORMAT_Z24_UNORM_S8_USCALED)
+		return 1;
+	else
+		return 0;
+}
+
 static inline uint32_t r600_translate_colorswap(enum pipe_format format)
 {
 	switch (format) {
diff --git a/src/gallium/drivers/r600/evergreen_state.c b/src/gallium/drivers/r600/evergreen_state.c
index 147d4f3..603a8a7 100644
--- a/src/gallium/drivers/r600/evergreen_state.c
+++ b/src/gallium/drivers/r600/evergreen_state.c
@@ -795,7 +795,7 @@ static void evergreen_db(struct r600_pipe_context *rctx, struct r600_pipe_state
 	struct r600_resource_texture *rtex;
 	struct r600_resource *rbuffer;
 	unsigned level;
-	unsigned pitch, slice, format;
+	unsigned pitch, slice, format, stencil_format;
 
 	if (state->zsbuf == NULL)
 		return;
@@ -811,13 +811,27 @@ static void evergreen_db(struct r600_pipe_context *rctx, struct r600_pipe_state
 	pitch = (rtex->pitch[level] / rtex->bpt) / 8 - 1;
 	slice = (rtex->pitch[level] / rtex->bpt) * state->zsbuf->height / 64 - 1;
 	format = r600_translate_dbformat(state->zsbuf->texture->format);
+	stencil_format = r600_translate_stencilformat(state->zsbuf->texture->format);
 
 	r600_pipe_state_add_reg(rstate, R_028048_DB_Z_READ_BASE,
 				(state->zsbuf->offset + r600_bo_offset(rbuffer->bo)) >> 8, 0xFFFFFFFF, rbuffer->bo);
 	r600_pipe_state_add_reg(rstate, R_028050_DB_Z_WRITE_BASE,
 				(state->zsbuf->offset  + r600_bo_offset(rbuffer->bo)) >> 8, 0xFFFFFFFF, rbuffer->bo);
-//	r600_pipe_state_add_reg(rstate, R_028014_DB_HTILE_DATA_BASE, state->zsbuf->offset >> 8, 0xFFFFFFFF, rbuffer->bo);
+
+	if (stencil_format) {
+		uint32_t stencil_offset;
+
+		stencil_offset = ((state->zsbuf->height * rtex->pitch[level]) + 255) & ~255;
+		r600_pipe_state_add_reg(rstate, R_02804C_DB_STENCIL_READ_BASE,
+					(state->zsbuf->offset + stencil_offset + r600_bo_offset(rbuffer->bo)) >> 8, 0xFFFFFFFF, rbuffer->bo);
+		r600_pipe_state_add_reg(rstate, R_028054_DB_STENCIL_WRITE_BASE,
+					(state->zsbuf->offset + stencil_offset + r600_bo_offset(rbuffer->bo)) >> 8, 0xFFFFFFFF, rbuffer->bo);
+	}
+
 	r600_pipe_state_add_reg(rstate, R_028008_DB_DEPTH_VIEW, 0x00000000, 0xFFFFFFFF, NULL);
+	r600_pipe_state_add_reg(rstate, R_028044_DB_STENCIL_INFO,
+				S_028044_FORMAT(stencil_format), 0xFFFFFFFF, rbuffer->bo);
+
 	r600_pipe_state_add_reg(rstate, R_028040_DB_Z_INFO,
 				S_028040_ARRAY_MODE(rtex->array_mode) | S_028040_FORMAT(format),
 				0xFFFFFFFF, rbuffer->bo);