gallium/radeon: add and use a new helper vi_dcc_enabled

Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
Tested-by: Edmondo Tommasina <edmondo.tommasina@gmail.com>
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>

src/gallium/drivers/radeon/r600_pipe_common.h

@@ -959,6 +959,12 @@ r600_can_sample_zs(struct r600_texture *tex, bool stencil_sampler)
 	       (!stencil_sampler && tex->can_sample_z);
 }
 
+static inline bool
+vi_dcc_enabled(struct r600_texture *tex, unsigned level)
+{
+	return tex->dcc_offset && level < tex->surface.num_dcc_levels;
+}
+
 #define COMPUTE_DBG(rscreen, fmt, args...) \
 	do { \
 		if ((rscreen->b.debug_flags & DBG_COMPUTE)) fprintf(stderr, fmt, ##args); \

src/gallium/drivers/radeon/r600_texture.c

@@ -72,8 +72,8 @@ bool r600_prepare_for_dma_blit(struct r600_common_context *rctx,
 	 *   src: Use the 3D path. DCC decompression is expensive.
 	 *   dst: Use the 3D path to compress the pixels with DCC.
 	 */
-	if ((rsrc->dcc_offset && src_level < rsrc->surface.num_dcc_levels) ||
-	    (rdst->dcc_offset && dst_level < rdst->surface.num_dcc_levels))
+	if (vi_dcc_enabled(rsrc, src_level) ||
+	    vi_dcc_enabled(rdst, dst_level))
 		return false;
 
 	/* CMASK as:
@@ -1912,8 +1912,7 @@ void vi_dcc_disable_if_incompatible_format(struct r600_common_context *rctx,
 {
 	struct r600_texture *rtex = (struct r600_texture *)tex;
 
-	if (rtex->dcc_offset &&
-	    level < rtex->surface.num_dcc_levels &&
+	if (vi_dcc_enabled(rtex, level) &&
 	    !vi_dcc_formats_compatible(tex->format, view_format))
 		if (!r600_texture_disable_dcc(rctx, (struct r600_texture*)tex))
 			rctx->decompress_dcc(&rctx->b, rtex);
@@ -2485,7 +2484,7 @@ void vi_dcc_clear_level(struct r600_common_context *rctx,
 	struct pipe_resource *dcc_buffer;
 	uint64_t dcc_offset, clear_size;
 
-	assert(rtex->dcc_offset && level < rtex->surface.num_dcc_levels);
+	assert(vi_dcc_enabled(rtex, level));
 
 	if (rtex->dcc_separate_buffer) {
 		dcc_buffer = &rtex->dcc_separate_buffer->b.b;
@@ -2701,7 +2700,7 @@ void evergreen_do_fast_color_clear(struct r600_common_context *rctx,
 		}
 
 		/* Try to clear DCC first, otherwise try CMASK. */
-		if (tex->dcc_offset && tex->surface.num_dcc_levels) {
+		if (vi_dcc_enabled(tex, 0)) {
 			uint32_t reset_value;
 			bool clear_words_needed;
 

src/gallium/drivers/radeonsi/si_blit.c

@@ -427,8 +427,7 @@ static void si_blit_decompress_color(struct pipe_context *ctx,
 
 		/* disable levels without DCC */
 		for (int i = first_level; i <= last_level; i++) {
-			if (!rtex->dcc_offset ||
-			    i >= rtex->surface.num_dcc_levels)
+			if (!vi_dcc_enabled(rtex, i))
 				level_mask &= ~(1 << i);
 		}
 	} else if (rtex->fmask.size) {
@@ -1039,8 +1038,7 @@ static bool do_hardware_msaa_resolve(struct pipe_context *ctx,
 		 * it's being overwritten anyway, clear it to uncompressed.
 		 * This is still the fastest codepath even with this clear.
 		 */
-		if (dst->dcc_offset &&
-		    info->dst.level < dst->surface.num_dcc_levels) {
+		if (vi_dcc_enabled(dst, info->dst.level)) {
 			/* TODO: Implement per-level DCC clears for GFX9. */
 			if (sctx->b.chip_class >= GFX9 &&
 			    info->dst.resource->last_level != 0)

src/gallium/drivers/radeonsi/si_descriptors.c

@@ -404,7 +404,7 @@ void si_set_mutable_tex_desc_fields(struct si_screen *sscreen,
 		va += base_level_info->offset;
 	}
 
-	if (tex->dcc_offset && first_level < tex->surface.num_dcc_levels) {
+	if (vi_dcc_enabled(tex, first_level)) {
 		meta_va = (!tex->dcc_separate_buffer ? tex->resource.gpu_address : 0) +
 			  tex->dcc_offset;
 
@@ -750,8 +750,7 @@ static void si_set_shader_image(struct si_context *ctx,
 		struct r600_texture *tex = (struct r600_texture *)res;
 		unsigned level = view->u.tex.level;
 		unsigned width, height, depth;
-		bool uses_dcc = tex->dcc_offset &&
-				level < tex->surface.num_dcc_levels;
+		bool uses_dcc = vi_dcc_enabled(tex, level);
 
 		assert(!tex->is_depth);
 		assert(tex->fmask.size == 0);

src/gallium/drivers/radeonsi/si_state.c

@@ -2638,7 +2638,7 @@ static void si_emit_framebuffer_state(struct si_context *sctx, struct r600_atom
 			cb_color_fmask = (tex->resource.gpu_address + tex->fmask.offset) >> 8;
 
 		/* Set up DCC. */
-		if (tex->dcc_offset && cb->base.u.tex.level < tex->surface.num_dcc_levels) {
+		if (vi_dcc_enabled(tex, cb->base.u.tex.level)) {
 			bool is_msaa_resolve_dst = state->cbufs[0] &&
 						   state->cbufs[0]->texture->nr_samples > 1 &&
 						   state->cbufs[1] == &cb->base &&