From: Marek Olšák <marek.ol...@amd.com>
DCC is limited in how texture formats can be reinterpreted using texture
views. If we get a view format that is incompatible with the initial
texture format with respect to DCC, disable DCC.
There is a new piglit which tests all format combinations.
What works and what doesn't was deduced by looking at the piglit failures.
---
src/gallium/drivers/radeon/r600_pipe_common.h | 6 ++
src/gallium/drivers/radeon/r600_texture.c | 96 +++++++++++++++++++++++++++
src/gallium/drivers/radeonsi/si_blit.c | 8 +++
src/gallium/drivers/radeonsi/si_descriptors.c | 3 +-
src/gallium/drivers/radeonsi/si_state.c | 4 ++
5 files changed, 116 insertions(+), 1 deletion(-)
diff --git a/src/gallium/drivers/radeon/r600_pipe_common.h
b/src/gallium/drivers/radeon/r600_pipe_common.h
index 1924535..624dea3 100644
--- a/src/gallium/drivers/radeon/r600_pipe_common.h
+++ b/src/gallium/drivers/radeon/r600_pipe_common.h
@@ -750,20 +750,26 @@ void r600_texture_get_fmask_info(struct
r600_common_screen *rscreen,
struct r600_fmask_info *out);
void r600_texture_get_cmask_info(struct r600_common_screen *rscreen,
struct r600_texture *rtex,
struct r600_cmask_info *out);
bool r600_init_flushed_depth_texture(struct pipe_context *ctx,
struct pipe_resource *texture,
struct r600_texture **staging);
void r600_print_texture_info(struct r600_texture *rtex, FILE *f);
struct pipe_resource *r600_texture_create(struct pipe_screen *screen,
const struct pipe_resource *templ);
+bool vi_dcc_formats_compatible(enum pipe_format format1,
+ enum pipe_format format2);
+void vi_dcc_disable_if_incompatible_format(struct r600_common_context *rctx,
+ struct pipe_resource *tex,
+ unsigned level,
+ enum pipe_format view_format);
struct pipe_surface *r600_create_surface_custom(struct pipe_context *pipe,
struct pipe_resource *texture,
const struct pipe_surface
*templ,
unsigned width, unsigned
height);
unsigned r600_translate_colorswap(enum pipe_format format, bool
do_endian_swap);
void vi_separate_dcc_start_query(struct pipe_context *ctx,
struct r600_texture *tex);
void vi_separate_dcc_stop_query(struct pipe_context *ctx,
struct r600_texture *tex);
void vi_separate_dcc_process_and_reset_stats(struct pipe_context *ctx,
diff --git a/src/gallium/drivers/radeon/r600_texture.c
b/src/gallium/drivers/radeon/r600_texture.c
index 7bdceb1..2f04019 100644
--- a/src/gallium/drivers/radeon/r600_texture.c
+++ b/src/gallium/drivers/radeon/r600_texture.c
@@ -1659,42 +1659,138 @@ static void r600_texture_transfer_unmap(struct
pipe_context *ctx,
static const struct u_resource_vtbl r600_texture_vtbl =
{
NULL, /* get_handle */
r600_texture_destroy, /* resource_destroy */
r600_texture_transfer_map, /* transfer_map */
u_default_transfer_flush_region, /* transfer_flush_region */
r600_texture_transfer_unmap, /* transfer_unmap */
};
+/* DCC channel type categories within which formats can be reinterpreted
+ * while keeping the same DCC encoding. The swizzle must also match. */
+enum dcc_channel_type {
+ dcc_channel_any32,
+ dcc_channel_int16,
+ dcc_channel_float16,
+ dcc_channel_any_10_10_10_2,
+ dcc_channel_any8,
+ dcc_channel_incompatible,
+};
+
+/* Return the type of DCC encoding. */
+static enum dcc_channel_type
+vi_get_dcc_channel_type(const struct util_format_description *desc)
+{
+ int i;
+
+ /* Find the first non-void channel. */
+ for (i = 0; i < desc->nr_channels; i++)
+ if (desc->channel[i].type != UTIL_FORMAT_TYPE_VOID)
+ break;
+ if (i == desc->nr_channels)
+ return dcc_channel_incompatible;
+
+ switch (desc->channel[i].size) {
+ case 32:
+ if (desc->nr_channels == 4)
+ return dcc_channel_incompatible;
+ else
+ return dcc_channel_any32;
+ case 16:
+ if (desc->channel[i].type == UTIL_FORMAT_TYPE_FLOAT)
+ return dcc_channel_float16;
+ else
+ return dcc_channel_int16;
+ case 10:
+ return dcc_channel_any_10_10_10_2;
+ case 8:
+ return dcc_channel_any8;
+ default:
+ return dcc_channel_incompatible;
+ }
+}
+
+/* Return if it's allowed to reinterpret one format as another with DCC
enabled. */
+bool vi_dcc_formats_compatible(enum pipe_format format1,
+ enum pipe_format format2)
+{
+ const struct util_format_description *desc1, *desc2;
+ enum dcc_channel_type type1, type2;
+ int i;
+
+ if (format1 == format2)
+ return true;
+
+ desc1 = util_format_description(format1);
+ desc2 = util_format_description(format2);
+
+ if (desc1->nr_channels != desc2->nr_channels)
+ return false;
+
+ /* Swizzles must be the same. */
+ for (i = 0; i < desc1->nr_channels; i++)
+ if (desc1->swizzle[i] <= PIPE_SWIZZLE_W &&
+ desc2->swizzle[i] <= PIPE_SWIZZLE_W &&
+ desc1->swizzle[i] != desc2->swizzle[i])
+ return false;
+
+ type1 = vi_get_dcc_channel_type(desc1);
+ type2 = vi_get_dcc_channel_type(desc2);
+
+ return type1 != dcc_channel_incompatible &&
+ type2 != dcc_channel_incompatible &&
+ type1 == type2;
+}
+
+void vi_dcc_disable_if_incompatible_format(struct r600_common_context *rctx,
+ struct pipe_resource *tex,
+ unsigned level,
+ enum pipe_format view_format)
+{
+ struct r600_texture *rtex = (struct r600_texture *)tex;
+
+ if (rtex->dcc_offset &&
+ rtex->surface.level[level].dcc_enabled &&
+ !vi_dcc_formats_compatible(tex->format, view_format))
+ if (!r600_texture_disable_dcc(rctx, (struct r600_texture*)tex))
+ rctx->decompress_dcc(&rctx->b, rtex);
+}
+
struct pipe_surface *r600_create_surface_custom(struct pipe_context *pipe,
struct pipe_resource *texture,
const struct pipe_surface
*templ,
unsigned width, unsigned height)
{
+ struct r600_common_context *rctx = (struct r600_common_context*)pipe;
struct r600_texture *rtex = (struct r600_texture*)texture;
struct r600_surface *surface = CALLOC_STRUCT(r600_surface);
if (!surface)
return NULL;
assert(templ->u.tex.first_layer <= util_max_layer(texture,
templ->u.tex.level));
assert(templ->u.tex.last_layer <= util_max_layer(texture,
templ->u.tex.level));
pipe_reference_init(&surface->base.reference, 1);
pipe_resource_reference(&surface->base.texture, texture);
surface->base.context = pipe;
surface->base.format = templ->format;
surface->base.width = width;
surface->base.height = height;
surface->base.u = templ->u;
surface->level_info = &rtex->surface.level[templ->u.tex.level];
+
+ vi_dcc_disable_if_incompatible_format(rctx, texture,
+ templ->u.tex.level,
+ templ->format);
+
return &surface->base;
}
static struct pipe_surface *r600_create_surface(struct pipe_context *pipe,
struct pipe_resource *tex,
const struct pipe_surface
*templ)
{
unsigned level = templ->u.tex.level;
unsigned width = u_minify(tex->width0, level);
unsigned height = u_minify(tex->height0, level);
diff --git a/src/gallium/drivers/radeonsi/si_blit.c
b/src/gallium/drivers/radeonsi/si_blit.c
index 1147b5b..c143601 100644
--- a/src/gallium/drivers/radeonsi/si_blit.c
+++ b/src/gallium/drivers/radeonsi/si_blit.c
@@ -1117,20 +1117,26 @@ static void si_blit(struct pipe_context *ctx,
info->dst.box.z,
info->src.resource, info->src.level,
&info->src.box);
return;
}
assert(util_blitter_is_blit_supported(sctx->blitter, info));
/* The driver doesn't decompress resources automatically while
* u_blitter is rendering. */
+ vi_dcc_disable_if_incompatible_format(&sctx->b, info->src.resource,
+ info->src.level,
+ info->src.format);
+ vi_dcc_disable_if_incompatible_format(&sctx->b, info->dst.resource,
+ info->dst.level,
+ info->dst.format);
si_decompress_subresource(ctx, info->src.resource, info->mask,
info->src.level,
info->src.box.z,
info->src.box.z + info->src.box.depth - 1);
if (sctx->screen->b.debug_flags & DBG_FORCE_DMA &&
util_try_blit_via_copy_region(ctx, info))
return;
si_blitter_begin(ctx, SI_BLIT |
@@ -1146,20 +1152,22 @@ static boolean si_generate_mipmap(struct pipe_context
*ctx,
unsigned first_layer, unsigned last_layer)
{
struct si_context *sctx = (struct si_context*)ctx;
struct r600_texture *rtex = (struct r600_texture *)tex;
if (!util_blitter_is_copy_supported(sctx->blitter, tex, tex))
return false;
/* The driver doesn't decompress resources automatically while
* u_blitter is rendering. */
+ vi_dcc_disable_if_incompatible_format(&sctx->b, tex, base_level,
+ format);
si_decompress_subresource(ctx, tex, PIPE_MASK_RGBAZS,
base_level, first_layer, last_layer);
/* Clear dirty_level_mask for the levels that will be overwritten. */
assert(base_level < last_level);
rtex->dirty_level_mask &= ~u_bit_consecutive(base_level + 1,
last_level - base_level);
si_blitter_begin(ctx, SI_BLIT | SI_DISABLE_RENDER_COND);
util_blitter_generate_mipmap(sctx->blitter, tex, format,
diff --git a/src/gallium/drivers/radeonsi/si_descriptors.c
b/src/gallium/drivers/radeonsi/si_descriptors.c
index b3174c6..c150175 100644
--- a/src/gallium/drivers/radeonsi/si_descriptors.c
+++ b/src/gallium/drivers/radeonsi/si_descriptors.c
@@ -646,21 +646,22 @@ static void si_set_shader_image(struct si_context *ctx,
unsigned level = view->u.tex.level;
unsigned width, height, depth;
uint32_t *desc = descs->list + slot * 8;
bool uses_dcc = tex->dcc_offset &&
tex->surface.level[level].dcc_enabled;
assert(!tex->is_depth);
assert(tex->fmask.size == 0);
if (uses_dcc &&
- view->access & PIPE_IMAGE_ACCESS_WRITE) {
+ (view->access & PIPE_IMAGE_ACCESS_WRITE ||
+ !vi_dcc_formats_compatible(res->b.b.format,
view->format))) {
/* If DCC can't be disabled, at least decompress it.
* The decompression is relatively cheap if the surface
* has been decompressed already.
*/
if (r600_texture_disable_dcc(&ctx->b, tex))
uses_dcc = false;
else
ctx->b.decompress_dcc(&ctx->b.b, tex);
}
diff --git a/src/gallium/drivers/radeonsi/si_state.c
b/src/gallium/drivers/radeonsi/si_state.c
index 026aded..803a021 100644
--- a/src/gallium/drivers/radeonsi/si_state.c
+++ b/src/gallium/drivers/radeonsi/si_state.c
@@ -3045,20 +3045,24 @@ si_create_sampler_view_custom(struct pipe_context *ctx,
case PIPE_FORMAT_X24S8_UINT:
case PIPE_FORMAT_S8X24_UINT:
case PIPE_FORMAT_X32_S8X24_UINT:
pipe_format = PIPE_FORMAT_S8_UINT;
surflevel = tmp->surface.stencil_level;
break;
default:;
}
}
+ vi_dcc_disable_if_incompatible_format(&sctx->b, texture,
+ state->u.tex.first_level,
+ state->format);
+
si_make_texture_descriptor(sctx->screen, tmp, true,
state->target, pipe_format, state_swizzle,
first_level, last_level,
state->u.tex.first_layer, last_layer,
width, height, depth,
view->state, view->fmask_state);
view->base_level_info = &surflevel[base_level];
view->base_level = base_level;
view->block_width = util_format_get_blockwidth(pipe_format);
--
2.7.4
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