r600g: add user clip plane support.

Apart from the fact that the radeon.h/r600_states.h editing is a nightmare, this
wasn't so bad.

passes piglit user-clip test now also trivial tests.

Signed-off-by: Dave Airlie <[email protected]>

4 files changed, 75 insertions, 9 deletions

diff --git a/src/gallium/drivers/r600/r600_blit.c b/src/gallium/drivers/r600/r600_blit.c
index f4eedfe4cb1..db7aef7ebd2 100644
--- a/src/gallium/drivers/r600/r600_blit.c
+++ b/src/gallium/drivers/r600/r600_blit.c
@@ -47,12 +47,14 @@ static void r600_blitter_save_states(struct r600_context *rctx)
 	if (rctx->viewport) {
 		util_blitter_save_viewport(rctx->blitter, &rctx->viewport->state.viewport);
 	}
-	/* XXX util_blitter_save_clip(rctx->blitter, &rctx->clip); */
+	if (rctx->clip)
+ 	    util_blitter_save_clip(rctx->blitter, &rctx->clip->state.clip);
 	util_blitter_save_vertex_buffers(rctx->blitter, rctx->nvertex_buffer,
 					rctx->vertex_buffer);
 
 	/* remove ptr so they don't get deleted */
 	rctx->blend = NULL;
+	rctx->clip = NULL;
 	rctx->vs_shader = NULL;
 	rctx->ps_shader = NULL;
 	rctx->rasterizer = NULL;
diff --git a/src/gallium/drivers/r600/r600_context.h b/src/gallium/drivers/r600/r600_context.h
index 76d5de86532..2ce29720d9c 100644
--- a/src/gallium/drivers/r600/r600_context.h
+++ b/src/gallium/drivers/r600/r600_context.h
@@ -98,6 +98,7 @@ struct r600_context_hw_states {
 	struct radeon_state	*config;
 	struct radeon_state	*cb_cntl;
 	struct radeon_state	*db;
+	struct radeon_state	*ucp[6];
 	unsigned		ps_nresource;
 	unsigned		ps_nsampler;
 	struct radeon_state	*ps_resource[160];
diff --git a/src/gallium/drivers/r600/r600_state.c b/src/gallium/drivers/r600/r600_state.c
index 3efd409ae0d..cbbc93c04a3 100644
--- a/src/gallium/drivers/r600/r600_state.c
+++ b/src/gallium/drivers/r600/r600_state.c
@@ -268,6 +268,14 @@ static void r600_set_blend_color(struct pipe_context *ctx,
 static void r600_set_clip_state(struct pipe_context *ctx,
 				const struct pipe_clip_state *state)
 {
+	struct r600_screen *rscreen = r600_screen(ctx->screen);
+	struct r600_context *rctx = r600_context(ctx);
+	struct r600_context_state *rstate;
+
+	rstate = r600_context_state(rctx, pipe_clip_type, state);
+	r600_bind_state(ctx, rstate);
+	/* refcount is taken care of this */
+	r600_delete_state(ctx, rstate);
 }
 
 static void r600_set_constant_buffer(struct pipe_context *ctx,
@@ -668,6 +676,29 @@ static struct radeon_state *r600_blend(struct r600_context *rctx)
 	return rstate;
 }
 
+static struct radeon_state *r600_ucp(struct r600_context *rctx, int clip)
+{
+	struct r600_screen *rscreen = rctx->screen;
+	struct radeon_state *rstate;
+	const struct pipe_clip_state *state = &rctx->clip->state.clip;
+
+	rstate = radeon_state(rscreen->rw, R600_CLIP_TYPE, R600_CLIP + clip);
+	if (rstate == NULL)
+		return NULL;
+
+	rstate->states[R600_CLIP__PA_CL_UCP_X_0] = fui(state->ucp[clip][0]);
+	rstate->states[R600_CLIP__PA_CL_UCP_Y_0] = fui(state->ucp[clip][1]);
+	rstate->states[R600_CLIP__PA_CL_UCP_Z_0] = fui(state->ucp[clip][2]);
+	rstate->states[R600_CLIP__PA_CL_UCP_W_0] = fui(state->ucp[clip][3]);
+
+	if (radeon_state_pm4(rstate)) {
+		radeon_state_decref(rstate);
+		return NULL;
+	}
+	return rstate;
+
+}
+
 static struct radeon_state *r600_cb(struct r600_context *rctx, int cb)
 {
 	struct r600_screen *rscreen = rctx->screen;
@@ -769,6 +800,7 @@ static struct radeon_state *r600_rasterizer(struct r600_context *rctx)
 {
 	const struct pipe_rasterizer_state *state = &rctx->rasterizer->state.rasterizer;
 	const struct pipe_framebuffer_state *fb = &rctx->framebuffer->state.framebuffer;
+	const struct pipe_clip_state *clip = NULL;
 	struct r600_screen *rscreen = rctx->screen;
 	struct radeon_state *rstate;
 	float offset_units = 0, offset_scale = 0;
@@ -776,6 +808,9 @@ static struct radeon_state *r600_rasterizer(struct r600_context *rctx)
 	unsigned offset_db_fmt_cntl = 0;
 	unsigned tmp;
 	unsigned prov_vtx = 1;
+
+	if (rctx->clip)
+		clip = &rctx->clip->state.clip;
 	if (fb->zsbuf) {
 		offset_units = state->offset_units;
 		offset_scale = state->offset_scale * 12.0f;
@@ -821,7 +856,11 @@ static struct radeon_state *r600_rasterizer(struct r600_context *rctx)
 					S_0286D4_PNT_SPRITE_TOP_1(1);
 		}
 	}
-	rstate->states[R600_RASTERIZER__PA_CL_CLIP_CNTL] = 0x00000000;
+	rstate->states[R600_RASTERIZER__PA_CL_CLIP_CNTL] = 0;
+	if (clip && clip->nr) {
+		rstate->states[R600_RASTERIZER__PA_CL_CLIP_CNTL] = S_028810_PS_UCP_MODE(3) | ((1 << clip->nr) - 1);
+		rstate->states[R600_RASTERIZER__PA_CL_CLIP_CNTL] |= S_028810_CLIP_DISABLE(clip->depth_clamp);
+	}
 	rstate->states[R600_RASTERIZER__PA_SU_SC_MODE_CNTL] =
 		S_028814_PROVOKING_VTX_LAST(prov_vtx) |
 		S_028814_CULL_FRONT((state->cull_face & PIPE_FACE_FRONT) ? 1 : 0) |
@@ -1301,6 +1340,10 @@ int r600_context_hw_states(struct r600_context *rctx)
 	unsigned i;
 	int r;
 	int nr_cbufs = rctx->framebuffer->state.framebuffer.nr_cbufs;
+	int ucp_nclip = 0;
+
+	if (rctx->clip) 
+		ucp_nclip = rctx->clip->state.clip.nr;
 
 	/* free previous TODO determine what need to be updated, what
 	 * doesn't
@@ -1316,6 +1359,9 @@ int r600_context_hw_states(struct r600_context *rctx)
 	for (i = 0; i < 8; i++) {
 		rctx->hw_states.cb[i] = radeon_state_decref(rctx->hw_states.cb[i]);
 	}
+	for (i = 0; i < 6; i++) {
+		rctx->hw_states.ucp[i] = radeon_state_decref(rctx->hw_states.ucp[i]);
+	}
 	for (i = 0; i < rctx->hw_states.ps_nresource; i++) {
 		radeon_state_decref(rctx->hw_states.ps_resource[i]);
 		rctx->hw_states.ps_resource[i] = NULL;
@@ -1336,6 +1382,9 @@ int r600_context_hw_states(struct r600_context *rctx)
 	for (i = 0; i < nr_cbufs; i++) {
 		rctx->hw_states.cb[i] = r600_cb(rctx, i);
 	}
+	for (i = 0; i < ucp_nclip; i++) {
+		rctx->hw_states.ucp[i] = r600_ucp(rctx, i);
+	}
 	rctx->hw_states.db = r600_db(rctx);
 	rctx->hw_states.cb_cntl = r600_cb_cntl(rctx);
 
@@ -1357,6 +1406,11 @@ int r600_context_hw_states(struct r600_context *rctx)
 	rctx->hw_states.ps_nresource = rctx->ps_nsampler_view;
 
 	/* bind states */
+	for (i = 0; i < ucp_nclip; i++) {
+		r = radeon_draw_set(rctx->draw, rctx->hw_states.ucp[i]);
+		if (r)
+			return r;
+	}
 	r = radeon_draw_set(rctx->draw, rctx->hw_states.db);
 	if (r)
 		return r;
diff --git a/src/gallium/drivers/r600/radeon.h b/src/gallium/drivers/r600/radeon.h
index 8f00a4895a0..d36c89d6a72 100644
--- a/src/gallium/drivers/r600/radeon.h
+++ b/src/gallium/drivers/r600/radeon.h
@@ -191,8 +191,8 @@ struct radeon_ctx {
  * R600/R700
  */
 
-#define R600_NSTATE				1280
-#define R600_NTYPE				32
+#define R600_NSTATE				1286
+#define R600_NTYPE				33
 
 #define R600_CONFIG				0
 #define R600_CONFIG_TYPE				0
@@ -254,10 +254,13 @@ struct radeon_ctx {
 #define R600_CB7_TYPE				28
 #define R600_DB				1277
 #define R600_DB_TYPE				29
-#define R600_VGT				1278
-#define R600_VGT_TYPE				30
-#define R600_DRAW				1279
-#define R600_DRAW_TYPE				31
+#define R600_CLIP				1278
+#define R600_CLIP_TYPE				30
+#define R600_VGT				1284
+#define R600_VGT_TYPE				31
+#define R600_DRAW				1285
+#define R600_DRAW_TYPE				32
+
 /* R600_CONFIG */
 #define R600_CONFIG__SQ_CONFIG			0
 #define R600_CONFIG__SQ_GPR_RESOURCE_MGMT_1			1
@@ -643,5 +646,11 @@ struct radeon_ctx {
 #define R600_DRAW__VGT_DRAW_INITIATOR			3
 #define R600_DRAW_SIZE				4
 #define R600_DRAW_PM4				128
-
+/* R600_CLIP */
+#define R600_CLIP__PA_CL_UCP_X_0  0
+#define R600_CLIP__PA_CL_UCP_Y_0  1
+#define R600_CLIP__PA_CL_UCP_Z_0  2
+#define R600_CLIP__PA_CL_UCP_W_0  3
+#define R600_CLIP_SIZE  4
+#define R600_CLIP_PM4 128
 #endif