From 243417810bce6b4e0c466a8b1dbe3873b4f5562b Mon Sep 17 00:00:00 2001
From: Rob Clark <robclark@freedesktop.org>
Date: Sat, 11 Jun 2016 12:59:00 -0400
Subject: [PATCH] freedreno: support start param for sampler views/states

Signed-off-by: Rob Clark <robclark@freedesktop.org>
---
 src/gallium/drivers/freedreno/freedreno_context.h |  3 +-
 src/gallium/drivers/freedreno/freedreno_texture.c | 53 +++++++++--------------
 2 files changed, 23 insertions(+), 33 deletions(-)

diff --git a/src/gallium/drivers/freedreno/freedreno_context.h b/src/gallium/drivers/freedreno/freedreno_context.h
index 5861fbe8..7ce2920 100644
--- a/src/gallium/drivers/freedreno/freedreno_context.h
+++ b/src/gallium/drivers/freedreno/freedreno_context.h
@@ -47,9 +47,10 @@ struct fd_vertex_stateobj;
 struct fd_texture_stateobj {
 	struct pipe_sampler_view *textures[PIPE_MAX_SAMPLERS];
 	unsigned num_textures;
+	unsigned valid_textures;
 	struct pipe_sampler_state *samplers[PIPE_MAX_SAMPLERS];
 	unsigned num_samplers;
-	unsigned dirty_samplers;
+	unsigned valid_samplers;
 };
 
 struct fd_program_stateobj {
diff --git a/src/gallium/drivers/freedreno/freedreno_texture.c b/src/gallium/drivers/freedreno/freedreno_texture.c
index a301811..b506595 100644
--- a/src/gallium/drivers/freedreno/freedreno_texture.c
+++ b/src/gallium/drivers/freedreno/freedreno_texture.c
@@ -50,45 +50,38 @@ fd_sampler_view_destroy(struct pipe_context *pctx,
 }
 
 static void bind_sampler_states(struct fd_texture_stateobj *tex,
-		unsigned nr, void **hwcso)
+		unsigned start, unsigned nr, void **hwcso)
 {
 	unsigned i;
-	unsigned new_nr = 0;
 
 	for (i = 0; i < nr; i++) {
-		if (hwcso[i])
-			new_nr = i + 1;
-		tex->samplers[i] = hwcso[i];
-		tex->dirty_samplers |= (1 << i);
-	}
-
-	for (; i < tex->num_samplers; i++) {
-		tex->samplers[i] = NULL;
-		tex->dirty_samplers |= (1 << i);
+		unsigned p = i + start;
+		tex->samplers[p] = hwcso[i];
+		if (tex->samplers[p])
+			tex->valid_samplers |= (1 << p);
+		else
+			tex->valid_samplers &= ~(1 << p);
 	}
 
-	tex->num_samplers = new_nr;
+	tex->num_samplers = util_last_bit(tex->valid_samplers);
 }
 
 static void set_sampler_views(struct fd_texture_stateobj *tex,
-		unsigned nr, struct pipe_sampler_view **views)
+		unsigned start, unsigned nr, struct pipe_sampler_view **views)
 {
 	unsigned i;
-	unsigned new_nr = 0;
 
 	for (i = 0; i < nr; i++) {
-		if (views[i])
-			new_nr = i + 1;
-		pipe_sampler_view_reference(&tex->textures[i], views[i]);
-		tex->dirty_samplers |= (1 << i);
+		struct pipe_sampler_view *view = views ? views[i] : NULL;
+		unsigned p = i + start;
+		pipe_sampler_view_reference(&tex->textures[p], view);
+		if (tex->textures[p])
+			tex->valid_textures |= (1 << p);
+		else
+			tex->valid_textures &= ~(1 << p);
 	}
 
-	for (; i < tex->num_textures; i++) {
-		pipe_sampler_view_reference(&tex->textures[i], NULL);
-		tex->dirty_samplers |= (1 << i);
-	}
-
-	tex->num_textures = new_nr;
+	tex->num_textures = util_last_bit(tex->valid_textures);
 }
 
 void
@@ -98,14 +91,12 @@ fd_sampler_states_bind(struct pipe_context *pctx,
 {
 	struct fd_context *ctx = fd_context(pctx);
 
-	assert(start == 0);
-
 	if (shader == PIPE_SHADER_FRAGMENT) {
-		bind_sampler_states(&ctx->fragtex, nr, hwcso);
+		bind_sampler_states(&ctx->fragtex, start, nr, hwcso);
 		ctx->dirty |= FD_DIRTY_FRAGTEX;
 	}
 	else if (shader == PIPE_SHADER_VERTEX) {
-		bind_sampler_states(&ctx->verttex, nr, hwcso);
+		bind_sampler_states(&ctx->verttex, start, nr, hwcso);
 		ctx->dirty |= FD_DIRTY_VERTTEX;
 	}
 }
@@ -117,8 +108,6 @@ fd_set_sampler_views(struct pipe_context *pctx, unsigned shader,
 {
 	struct fd_context *ctx = fd_context(pctx);
 
-	assert(start == 0);
-
 	switch (shader) {
 	case PIPE_SHADER_FRAGMENT:
 		/* on a2xx, since there is a flat address space for textures/samplers,
@@ -130,11 +119,11 @@ fd_set_sampler_views(struct pipe_context *pctx, unsigned shader,
 		if (nr != ctx->fragtex.num_textures)
 			ctx->dirty |= FD_DIRTY_TEXSTATE;
 
-		set_sampler_views(&ctx->fragtex, nr, views);
+		set_sampler_views(&ctx->fragtex, start, nr, views);
 		ctx->dirty |= FD_DIRTY_FRAGTEX;
 		break;
 	case PIPE_SHADER_VERTEX:
-		set_sampler_views(&ctx->verttex, nr, views);
+		set_sampler_views(&ctx->verttex, start, nr, views);
 		ctx->dirty |= FD_DIRTY_VERTTEX;
 		break;
 	default:
-- 
2.7.4