r600g: atomize scissor state

The workaround for R600 lacking VPORT_SCISSOR_ENABLE has also been simplified.

Reviewed-by: Jerome Glisse <jglisse@redhat.com>

src/gallium/drivers/r600/evergreen_hw_context.c

@@ -38,8 +38,6 @@ static const struct r600_reg evergreen_context_reg_list[] = {
 	{R_028014_DB_HTILE_DATA_BASE, REG_FLAG_NEED_BO, 0},
 	{GROUP_FORCE_NEW_BLOCK, 0, 0},
 	{R_028234_PA_SU_HARDWARE_SCREEN_OFFSET, 0, 0},
-	{R_028250_PA_SC_VPORT_SCISSOR_0_TL, 0, 0},
-	{R_028254_PA_SC_VPORT_SCISSOR_0_BR, 0, 0},
 	{R_028350_SX_MISC, 0, 0},
 	{GROUP_FORCE_NEW_BLOCK, 0, 0},
 	{R_02861C_SPI_VS_OUT_ID_0, 0, 0},
@@ -120,8 +118,6 @@ static const struct r600_reg cayman_context_reg_list[] = {
 	{R_028014_DB_HTILE_DATA_BASE, REG_FLAG_NEED_BO, 0},
 	{GROUP_FORCE_NEW_BLOCK, 0, 0},
 	{R_028234_PA_SU_HARDWARE_SCREEN_OFFSET, 0, 0},
-	{R_028250_PA_SC_VPORT_SCISSOR_0_TL, 0, 0},
-	{R_028254_PA_SC_VPORT_SCISSOR_0_BR, 0, 0},
 	{R_028350_SX_MISC, 0, 0},
 	{GROUP_FORCE_NEW_BLOCK, 0, 0},
 	{R_02861C_SPI_VS_OUT_ID_0, 0, 0},

src/gallium/drivers/r600/evergreen_state.c

@@ -1168,23 +1168,22 @@ static void evergreen_set_scissor_state(struct pipe_context *ctx,
 					const struct pipe_scissor_state *state)
 {
 	struct r600_context *rctx = (struct r600_context *)ctx;
-	struct r600_pipe_state *rstate = CALLOC_STRUCT(r600_pipe_state);
-	uint32_t tl, br;
 
-	rctx->scissor = *state;
+	rctx->scissor.scissor = *state;
+	rctx->scissor.atom.dirty = true;
+}
 
-	if (rstate == NULL)
-		return;
+static void evergreen_emit_scissor_state(struct r600_context *rctx, struct r600_atom *atom)
+{
+	struct radeon_winsys_cs *cs = rctx->cs;
+	struct pipe_scissor_state *state = &rctx->scissor.scissor;
+	uint32_t tl, br;
 
 	evergreen_get_scissor_rect(rctx, state->minx, state->miny, state->maxx, state->maxy, &tl, &br);
 
-	rstate->id = R600_PIPE_STATE_SCISSOR;
-	r600_pipe_state_add_reg(rstate, R_028250_PA_SC_VPORT_SCISSOR_0_TL, tl);
-	r600_pipe_state_add_reg(rstate, R_028254_PA_SC_VPORT_SCISSOR_0_BR, br);
-
-	free(rctx->states[R600_PIPE_STATE_SCISSOR]);
-	rctx->states[R600_PIPE_STATE_SCISSOR] = rstate;
-	r600_context_pipe_state_set(rctx, rstate);
+	r600_write_context_reg_seq(cs, R_028250_PA_SC_VPORT_SCISSOR_0_TL, 2);
+	r600_write_value(cs, tl);
+	r600_write_value(cs, br);
 }
 
 /**
@@ -2421,6 +2420,7 @@ void evergreen_init_state_functions(struct r600_context *rctx)
 	r600_init_atom(rctx, &rctx->clip_state.atom, id++, evergreen_emit_clip_state, 26);
 	r600_init_atom(rctx, &rctx->db_misc_state.atom, id++, evergreen_emit_db_misc_state, 7);
 	r600_init_atom(rctx, &rctx->poly_offset_state.atom, id++, evergreen_emit_polygon_offset, 6);
+	r600_init_atom(rctx, &rctx->scissor.atom, id++, evergreen_emit_scissor_state, 4);
 	r600_init_atom(rctx, &rctx->stencil_ref.atom, id++, r600_emit_stencil_ref, 4);
 	r600_init_atom(rctx, &rctx->viewport.atom, id++, r600_emit_viewport_state, 8);
 	r600_init_atom(rctx, &rctx->vertex_fetch_shader.atom, id++, evergreen_emit_vertex_fetch_shader, 5);

src/gallium/drivers/r600/r600_blit.c

@@ -66,7 +66,7 @@ static void r600_blitter_begin(struct pipe_context *ctx, enum r600_blitter_op op
 
 	if (op & R600_SAVE_FRAGMENT_STATE) {
 		util_blitter_save_viewport(rctx->blitter, &rctx->viewport.state);
-		util_blitter_save_scissor(rctx->blitter, &rctx->scissor);
+		util_blitter_save_scissor(rctx->blitter, &rctx->scissor.scissor);
 		util_blitter_save_fragment_shader(rctx->blitter, rctx->ps_shader);
 		util_blitter_save_blend(rctx->blitter, rctx->blend_state.cso);
 		util_blitter_save_depth_stencil_alpha(rctx->blitter, rctx->states[R600_PIPE_STATE_DSA]);

src/gallium/drivers/r600/r600_hw_context.c

@@ -225,8 +225,6 @@ static const struct r600_reg r600_context_reg_list[] = {
 	{R_02880C_DB_SHADER_CONTROL, 0, 0},
 	{GROUP_FORCE_NEW_BLOCK, 0, 0},
 	{R_028D24_DB_HTILE_SURFACE, 0, 0},
-	{R_028250_PA_SC_VPORT_SCISSOR_0_TL, 0, 0},
-	{R_028254_PA_SC_VPORT_SCISSOR_0_BR, 0, 0},
 	{R_0286D4_SPI_INTERP_CONTROL_0, 0, 0},
 	{R_028814_PA_SU_SC_MODE_CNTL, 0, 0},
 	{R_028A00_PA_SU_POINT_SIZE, 0, 0},
@@ -866,6 +864,7 @@ void r600_begin_new_cs(struct r600_context *ctx)
 	ctx->vgt_state.atom.dirty = true;
 	ctx->vgt2_state.atom.dirty = true;
 	ctx->sample_mask.atom.dirty = true;
+	ctx->scissor.atom.dirty = true;
 	ctx->stencil_ref.atom.dirty = true;
 	ctx->vertex_fetch_shader.atom.dirty = true;
 	ctx->viewport.atom.dirty = true;

src/gallium/drivers/r600/r600_pipe.c

@@ -298,9 +298,6 @@ static struct pipe_context *r600_create_context(struct pipe_screen *screen, void
 	r600_begin_new_cs(rctx);
 	r600_get_backend_mask(rctx); /* this emits commands and must be last */
 
-	if (rctx->chip_class == R600)
-		r600_set_max_scissor(rctx);
-
 	rctx->dummy_pixel_shader =
 		util_make_fragment_cloneinput_shader(&rctx->context, 0,
 						     TGSI_SEMANTIC_GENERIC,

src/gallium/drivers/r600/r600_pipe.h

@@ -35,7 +35,7 @@
 #include "r600_resource.h"
 #include "evergreen_compute.h"
 
-#define R600_NUM_ATOMS 32
+#define R600_NUM_ATOMS 33
 
 #define R600_MAX_CONST_BUFFERS 2
 #define R600_MAX_CONST_BUFFER_SIZE 4096
@@ -161,7 +161,6 @@ struct r600_viewport_state {
 };
 
 enum r600_pipe_state_id {
-	R600_PIPE_STATE_SCISSOR,
 	R600_PIPE_STATE_RASTERIZER,
 	R600_PIPE_STATE_DSA,
 	R600_PIPE_NSTATES
@@ -362,6 +361,13 @@ struct r600_cso_state
 	struct r600_command_buffer *cb;
 };
 
+struct r600_scissor_state
+{
+	struct r600_atom		atom;
+	struct pipe_scissor_state	scissor;
+	bool				enable; /* r6xx only */
+};
+
 struct r600_context {
 	struct pipe_context		context;
 	struct blitter_context		*blitter;
@@ -381,7 +387,6 @@ struct r600_context {
 	unsigned			db_shader_control;
 	unsigned			pa_sc_line_stipple;
 	/* for saving when using blitter */
-	struct pipe_scissor_state	scissor;
 	struct r600_pipe_shader_selector 	*ps_shader;
 	struct r600_pipe_shader_selector 	*vs_shader;
 	struct r600_pipe_rasterizer	*rasterizer;
@@ -420,6 +425,7 @@ struct r600_context {
 	struct r600_framebuffer		framebuffer;
 	struct r600_poly_offset_state	poly_offset_state;
 	struct r600_sample_mask		sample_mask;
+	struct r600_scissor_state	scissor;
 	struct r600_seamless_cube_map	seamless_cube_map;
 	struct r600_stencil_ref_state	stencil_ref;
 	struct r600_vgt_state		vgt_state;
@@ -478,10 +484,6 @@ struct r600_context {
 	boolean			streamout_start;
 	unsigned		streamout_append_bitmask;
 
-	/* There is no scissor enable bit on r6xx, so we must use a workaround.
-	 * This tracks if the scissor is enabled. */
-	bool			scissor_enable;
-
 	/* With rasterizer discard, there doesn't have to be a pixel shader.
 	 * In that case, we bind this one: */
 	void			*dummy_pixel_shader;
@@ -615,8 +617,6 @@ r600_create_sampler_view_custom(struct pipe_context *ctx,
 				struct pipe_resource *texture,
 				const struct pipe_sampler_view *state,
 				unsigned width_first_level, unsigned height_first_level);
-void r600_set_scissor_state(struct r600_context *rctx,
-			    const struct pipe_scissor_state *state);
 void r600_init_state_functions(struct r600_context *rctx);
 void r600_init_atom_start_cs(struct r600_context *rctx);
 void r600_pipe_shader_ps(struct pipe_context *ctx, struct r600_pipe_shader *shader);
@@ -669,7 +669,6 @@ void r600_sampler_views_dirty(struct r600_context *rctx,
 			      struct r600_samplerview_state *state);
 void r600_sampler_states_dirty(struct r600_context *rctx,
 			       struct r600_sampler_states *state);
-void r600_set_max_scissor(struct r600_context *rctx);
 void r600_constant_buffers_dirty(struct r600_context *rctx, struct r600_constbuf_state *state);
 void r600_draw_rectangle(struct blitter_context *blitter,
 			 int x1, int y1, int x2, int y2, float depth,

src/gallium/drivers/r600/r600_state.c

@@ -1134,39 +1134,35 @@ static void r600_set_polygon_stipple(struct pipe_context *ctx,
 {
 }
 
-void r600_set_scissor_state(struct r600_context *rctx,
-			    const struct pipe_scissor_state *state)
+static void r600_emit_scissor_state(struct r600_context *rctx, struct r600_atom *atom)
 {
-	struct r600_pipe_state *rstate = CALLOC_STRUCT(r600_pipe_state);
-	uint32_t tl, br;
-
-	if (rstate == NULL)
-		return;
-
-	rstate->id = R600_PIPE_STATE_SCISSOR;
-	tl = S_028240_TL_X(state->minx) | S_028240_TL_Y(state->miny) | S_028240_WINDOW_OFFSET_DISABLE(1);
-	br = S_028244_BR_X(state->maxx) | S_028244_BR_Y(state->maxy);
-	r600_pipe_state_add_reg(rstate,
-				R_028250_PA_SC_VPORT_SCISSOR_0_TL, tl);
-	r600_pipe_state_add_reg(rstate,
-				R_028254_PA_SC_VPORT_SCISSOR_0_BR, br);
+	struct radeon_winsys_cs *cs = rctx->cs;
+	struct pipe_scissor_state *state = &rctx->scissor.scissor;
 
-	free(rctx->states[R600_PIPE_STATE_SCISSOR]);
-	rctx->states[R600_PIPE_STATE_SCISSOR] = rstate;
-	r600_context_pipe_state_set(rctx, rstate);
+	if (rctx->chip_class != R600 || rctx->scissor.enable) {
+		r600_write_context_reg_seq(cs, R_028250_PA_SC_VPORT_SCISSOR_0_TL, 2);
+		r600_write_value(cs, S_028240_TL_X(state->minx) | S_028240_TL_Y(state->miny) |
+				     S_028240_WINDOW_OFFSET_DISABLE(1));
+		r600_write_value(cs, S_028244_BR_X(state->maxx) | S_028244_BR_Y(state->maxy));
+	} else {
+		r600_write_context_reg_seq(cs, R_028250_PA_SC_VPORT_SCISSOR_0_TL, 2);
+		r600_write_value(cs, S_028240_TL_X(0) | S_028240_TL_Y(0) |
+				     S_028240_WINDOW_OFFSET_DISABLE(1));
+		r600_write_value(cs, S_028244_BR_X(8192) | S_028244_BR_Y(8192));
+	}
 }
 
-static void r600_pipe_set_scissor_state(struct pipe_context *ctx,
-					const struct pipe_scissor_state *state)
+static void r600_set_scissor_state(struct pipe_context *ctx,
+				   const struct pipe_scissor_state *state)
 {
 	struct r600_context *rctx = (struct r600_context *)ctx;
 
-	rctx->scissor = *state;
+	rctx->scissor.scissor = *state;
 
-	if (rctx->chip_class == R600 && !rctx->scissor_enable)
+	if (rctx->chip_class == R600 && !rctx->scissor.enable)
 		return;
 
-	r600_set_scissor_state(rctx, state);
+	rctx->scissor.atom.dirty = true;
 }
 
 static struct r600_resource *r600_buffer_create_helper(struct r600_screen *rscreen,
@@ -2183,6 +2179,7 @@ void r600_init_state_functions(struct r600_context *rctx)
 	r600_init_atom(rctx, &rctx->clip_state.atom, id++, r600_emit_clip_state, 26);
 	r600_init_atom(rctx, &rctx->db_misc_state.atom, id++, r600_emit_db_misc_state, 4);
 	r600_init_atom(rctx, &rctx->poly_offset_state.atom, id++, r600_emit_polygon_offset, 6);
+	r600_init_atom(rctx, &rctx->scissor.atom, id++, r600_emit_scissor_state, 4);
 	r600_init_atom(rctx, &rctx->stencil_ref.atom, id++, r600_emit_stencil_ref, 4);
 	r600_init_atom(rctx, &rctx->viewport.atom, id++, r600_emit_viewport_state, 8);
 	r600_init_atom(rctx, &rctx->vertex_fetch_shader.atom, id++, r600_emit_vertex_fetch_shader, 5);
@@ -2194,7 +2191,7 @@ void r600_init_state_functions(struct r600_context *rctx)
 	rctx->context.create_sampler_view = r600_create_sampler_view;
 	rctx->context.set_framebuffer_state = r600_set_framebuffer_state;
 	rctx->context.set_polygon_stipple = r600_set_polygon_stipple;
-	rctx->context.set_scissor_state = r600_pipe_set_scissor_state;
+	rctx->context.set_scissor_state = r600_set_scissor_state;
 }
 
 /* Adjust GPR allocation on R6xx/R7xx */

src/gallium/drivers/r600/r600_state_common.c

@@ -298,18 +298,6 @@ static void r600_bind_dsa_state(struct pipe_context *ctx, void *state)
 	}
 }
 
-void r600_set_max_scissor(struct r600_context *rctx)
-{
-	/* Set a scissor state such that it doesn't do anything. */
-	struct pipe_scissor_state scissor;
-	scissor.minx = 0;
-	scissor.miny = 0;
-	scissor.maxx = 8192;
-	scissor.maxy = 8192;
-
-	r600_set_scissor_state(rctx, &scissor);
-}
-
 static void r600_bind_rs_state(struct pipe_context *ctx, void *state)
 {
 	struct r600_pipe_rasterizer *rs = (struct r600_pipe_rasterizer *)state;
@@ -345,16 +333,10 @@ static void r600_bind_rs_state(struct pipe_context *ctx, void *state)
 	}
 
 	/* Workaround for a missing scissor enable on r600. */
-	if (rctx->chip_class == R600) {
-		if (rs->scissor_enable != rctx->scissor_enable) {
-			rctx->scissor_enable = rs->scissor_enable;
-
-			if (rs->scissor_enable) {
-				r600_set_scissor_state(rctx, &rctx->scissor);
-			} else {
-				r600_set_max_scissor(rctx);
-			}
-		}
+	if (rctx->chip_class == R600 &&
+	    rs->scissor_enable != rctx->scissor.enable) {
+		rctx->scissor.enable = rs->scissor_enable;
+		rctx->scissor.atom.dirty = true;
 	}
 }