r600g: add cb support for snorm formats.

Check for signed type and enable SNORM.

Signed-off-by: Dave Airlie <airlied@redhat.com>

src/gallium/drivers/r600/evergreen_state.c

@@ -680,10 +680,17 @@ static void evergreen_cb(struct r600_pipe_context *rctx, struct r600_pipe_state
 					 level, state->cbufs[cb]->u.tex.first_layer);
 	pitch = rtex->pitch_in_blocks[level] / 8 - 1;
 	slice = rtex->pitch_in_blocks[level] * surf->aligned_height / 64 - 1;
-	ntype = V_028C70_NUMBER_UNORM;
 	desc = util_format_description(surf->base.format);
+	for (i = 0; i < 4; i++) {
+		if (desc->channel[i].type != UTIL_FORMAT_TYPE_VOID) {
+			break;
+		}
+	}
+	ntype = V_028C70_NUMBER_UNORM;
 	if (desc->colorspace == UTIL_FORMAT_COLORSPACE_SRGB)
 		ntype = V_028C70_NUMBER_SRGB;
+	else if (desc->channel[i].type == UTIL_FORMAT_TYPE_SIGNED)
+		ntype = V_028C70_NUMBER_SNORM;
 
 	format = r600_translate_colorformat(surf->base.format);
 	swap = r600_translate_colorswap(surf->base.format);
@@ -698,11 +705,6 @@ static void evergreen_cb(struct r600_pipe_context *rctx, struct r600_pipe_state
 		S_028C70_BLEND_CLAMP(1) |
 		S_028C70_NUMBER_TYPE(ntype);
 
-	for (i = 0; i < 4; i++) {
-		if (desc->channel[i].type != UTIL_FORMAT_TYPE_VOID) {
-			break;
-		}
-	}
 
 	/* we can only set the export size if any thing is snorm/unorm component is > 11 bits,
 	   if we aren't a float, sint or uint */

src/gallium/drivers/r600/r600_state.c

@@ -742,16 +742,18 @@ static void r600_cb(struct r600_pipe_context *rctx, struct r600_pipe_state *rsta
 					 level, state->cbufs[cb]->u.tex.first_layer);
 	pitch = rtex->pitch_in_blocks[level] / 8 - 1;
 	slice = rtex->pitch_in_blocks[level] * surf->aligned_height / 64 - 1;
-	ntype = V_0280A0_NUMBER_UNORM;
 	desc = util_format_description(surf->base.format);
-	if (desc->colorspace == UTIL_FORMAT_COLORSPACE_SRGB)
-		ntype = V_0280A0_NUMBER_SRGB;
 
 	for (i = 0; i < 4; i++) {
 		if (desc->channel[i].type != UTIL_FORMAT_TYPE_VOID) {
 			break;
 		}
 	}
+	ntype = V_0280A0_NUMBER_UNORM;
+	if (desc->colorspace == UTIL_FORMAT_COLORSPACE_SRGB)
+		ntype = V_0280A0_NUMBER_SRGB;
+	else if (desc->channel[i].type == UTIL_FORMAT_TYPE_SIGNED)
+		ntype = V_0280A0_NUMBER_SNORM;
 
 	format = r600_translate_colorformat(surf->base.format);
 	swap = r600_translate_colorswap(surf->base.format);