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i965: Enable regular fast-clears (CCS_D) on gen9+ 

The set of formats which supports CCS_E is actually fairly small on
gen9.  However, everything that supports fast-clears on gen8 also
supports fast-clears on gen9+.  The one very annoying exception is
that blending is broken for non-0/1 clear colors with sRGB formats.
In order to solve that problem, we do a resolve to get rid of the
clear color.  Another option would be to just not fast-clear with
non-0/1 clear colors however non-0/1 + blending + sRGB is uncommon
enough that this shouldn't be a significant performance problem.

This appears to help gl_manhattan31_off by about 2%.

Reviewed-by: Topi Pohjolainen <topi.pohjolainen@intel.com>
This commit is contained in:
Jason Ekstrand 2017-06-21 21:35:07 -07:00
parent d4de403f91
commit 3e57e9494c
6 changed files with 46 additions and 60 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
src/mesa/drivers/dri/i965/brw_blorp.c
View File

@ -317,7 +317,7 @@ brw_blorp_blit_miptrees(struct brw_context *brw,
src_aux_usage, src_clear_supported);
enum isl_aux_usage dst_aux_usage =
intel_miptree_render_aux_usage(brw, dst_mt, encode_srgb);
intel_miptree_render_aux_usage(brw, dst_mt, encode_srgb, false);
const bool dst_clear_supported = dst_aux_usage != ISL_AUX_USAGE_NONE;
intel_miptree_prepare_access(brw, dst_mt, dst_level, 1, dst_layer, 1,
dst_aux_usage, dst_clear_supported);
@ -876,9 +876,9 @@ do_single_blorp_clear(struct brw_context *brw, struct gl_framebuffer *fb,
irb->mt, irb->mt_level, irb->mt_layer, num_layers);
enum isl_aux_usage aux_usage =
intel_miptree_render_aux_usage(brw, irb->mt, encode_srgb);
intel_miptree_render_aux_usage(brw, irb->mt, encode_srgb, false);
intel_miptree_prepare_render(brw, irb->mt, level, irb->mt_layer,
num_layers, encode_srgb);
num_layers, encode_srgb, false);
struct isl_surf isl_tmp[2];
struct blorp_surf surf;
@ -898,8 +898,8 @@ do_single_blorp_clear(struct brw_context *brw, struct gl_framebuffer *fb,
clear_color, color_write_disable);
blorp_batch_finish(&batch);
intel_miptree_finish_render(brw, irb->mt, level,
irb->mt_layer, num_layers, encode_srgb);
intel_miptree_finish_render(brw, irb->mt, level, irb->mt_layer,
num_layers, encode_srgb, false);
}
return;

6
src/mesa/drivers/dri/i965/brw_draw.c
View File

@ -473,7 +473,8 @@ brw_predraw_resolve_framebuffer(struct brw_context *brw)
intel_miptree_prepare_render(brw, irb->mt, irb->mt_level,
irb->mt_layer, irb->layer_count,
ctx->Color.sRGBEnabled);
ctx->Color.sRGBEnabled,
ctx->Color.BlendEnabled & (1 << i));
}
}
@ -541,7 +542,8 @@ brw_postdraw_set_buffers_need_resolve(struct brw_context *brw)
brw_render_cache_set_add_bo(brw, irb->mt->bo);
intel_miptree_finish_render(brw, irb->mt, irb->mt_level,
irb->mt_layer, irb->layer_count,
ctx->Color.sRGBEnabled);
ctx->Color.sRGBEnabled,
ctx->Color.BlendEnabled & (1 << i));
}
}

11
src/mesa/drivers/dri/i965/brw_meta_util.c
View File

@ -292,17 +292,6 @@ brw_is_color_fast_clear_compatible(struct brw_context *brw,
brw->mesa_to_isl_render_format[mt->format])
return false;
/* Gen9 doesn't support fast clear on single-sampled SRGB buffers. When
* GL_FRAMEBUFFER_SRGB is enabled any color renderbuffers will be
* resolved in intel_update_state. In that case it's pointless to do a
* fast clear because it's very likely to be immediately resolved.
*/
if (brw->gen >= 9 &&
mt->surf.samples == 1 &&
ctx->Color.sRGBEnabled &&
_mesa_get_srgb_format_linear(mt->format) != mt->format)
return false;
const mesa_format format = _mesa_get_render_format(ctx, mt->format);
if (_mesa_is_format_integer_color(format)) {
if (brw->gen >= 8) {

5
src/mesa/drivers/dri/i965/brw_wm_surface_state.c
View File

@ -208,7 +208,7 @@ brw_emit_surface_state(struct brw_context *brw,
uint32_t
brw_update_renderbuffer_surface(struct brw_context *brw,
struct gl_renderbuffer *rb,
uint32_t flags, unsigned unit /* unused */,
uint32_t flags, unsigned unit,
uint32_t surf_index)
{
struct gl_context *ctx = &brw->ctx;
@ -216,7 +216,8 @@ brw_update_renderbuffer_surface(struct brw_context *brw,
struct intel_mipmap_tree *mt = irb->mt;
enum isl_aux_usage aux_usage =
intel_miptree_render_aux_usage(brw, mt, ctx->Color.sRGBEnabled);
intel_miptree_render_aux_usage(brw, mt, ctx->Color.sRGBEnabled,
ctx->Color.BlendEnabled & (1 << unit));
if (flags & INTEL_AUX_BUFFER_DISABLED) {
assert(brw->gen >= 9);

68
src/mesa/drivers/dri/i965/intel_mipmap_tree.c
View File

@ -201,13 +201,7 @@ intel_miptree_supports_ccs(struct brw_context *brw,
if (!brw->mesa_format_supports_render[mt->format])
return false;
if (brw->gen >= 9) {
mesa_format linear_format = _mesa_get_srgb_format_linear(mt->format);
const enum isl_format isl_format =
brw_isl_format_for_mesa_format(linear_format);
return isl_format_supports_ccs_e(&brw->screen->devinfo, isl_format);
} else
return true;
return true;
}
static bool
@ -259,12 +253,13 @@ intel_miptree_supports_ccs_e(struct brw_context *brw,
if (!intel_miptree_supports_ccs(brw, mt))
return false;
/* Fast clear can be also used to clear srgb surfaces by using equivalent
* linear format. This trick, however, can't be extended to be used with
* lossless compression and therefore a check is needed to see if the format
* really is linear.
/* Many window system buffers are sRGB even if they are never rendered as
* sRGB. For those, we want CCS_E for when sRGBEncode is false. When the
* surface is used as sRGB, we fall back to CCS_D.
*/
return _mesa_get_srgb_format_linear(mt->format) == mt->format;
mesa_format linear_format = _mesa_get_srgb_format_linear(mt->format);
enum isl_format isl_format = brw_isl_format_for_mesa_format(linear_format);
return isl_format_supports_ccs_e(&brw->screen->devinfo, isl_format);
}
/**
@ -2584,7 +2579,7 @@ intel_miptree_prepare_fb_fetch(struct brw_context *brw,
enum isl_aux_usage
intel_miptree_render_aux_usage(struct brw_context *brw,
struct intel_mipmap_tree *mt,
bool srgb_enabled)
bool srgb_enabled, bool blend_enabled)
{
switch (mt->aux_usage) {
case ISL_AUX_USAGE_MCS:
@ -2592,29 +2587,28 @@ intel_miptree_render_aux_usage(struct brw_context *brw,
return ISL_AUX_USAGE_MCS;
case ISL_AUX_USAGE_CCS_D:
/* If FRAMEBUFFER_SRGB is used on Gen9+ then we need to resolve any of
* the single-sampled color renderbuffers because the CCS buffer isn't
* supported for SRGB formats. This only matters if FRAMEBUFFER_SRGB is
* enabled because otherwise the surface state will be programmed with
* the linear equivalent format anyway.
*/
if (srgb_enabled &&
_mesa_get_srgb_format_linear(mt->format) != mt->format) {
return ISL_AUX_USAGE_NONE;
} else if (!mt->mcs_buf) {
return ISL_AUX_USAGE_NONE;
} else {
return ISL_AUX_USAGE_CCS_D;
}
return mt->mcs_buf ? ISL_AUX_USAGE_CCS_D : ISL_AUX_USAGE_NONE;
case ISL_AUX_USAGE_CCS_E: {
/* Lossless compression is not supported for SRGB formats, it
* should be impossible to get here with such surfaces.
*/
assert(!srgb_enabled ||
_mesa_get_srgb_format_linear(mt->format) == mt->format);
mesa_format mesa_format =
srgb_enabled ? mt->format :_mesa_get_srgb_format_linear(mt->format);
enum isl_format isl_format = brw_isl_format_for_mesa_format(mesa_format);
return ISL_AUX_USAGE_CCS_E;
/* If the format supports CCS_E, then we can just use it */
if (isl_format_supports_ccs_e(&brw->screen->devinfo, isl_format))
return ISL_AUX_USAGE_CCS_E;
/* Otherwise, we have to fall back to CCS_D */
/* gen9 hardware technically supports non-0/1 clear colors with sRGB
* formats. However, there are issues with blending where it doesn't
* properly apply the sRGB curve to the clear color when blending.
*/
if (blend_enabled && isl_format_is_srgb(isl_format) &&
!isl_color_value_is_zero_one(mt->fast_clear_color, isl_format))
return ISL_AUX_USAGE_NONE;
return ISL_AUX_USAGE_CCS_D;
}
default:
@ -2626,10 +2620,10 @@ void
intel_miptree_prepare_render(struct brw_context *brw,
struct intel_mipmap_tree *mt, uint32_t level,
uint32_t start_layer, uint32_t layer_count,
bool srgb_enabled)
bool srgb_enabled, bool blend_enabled)
{
enum isl_aux_usage aux_usage =
intel_miptree_render_aux_usage(brw, mt, srgb_enabled);
intel_miptree_render_aux_usage(brw, mt, srgb_enabled, blend_enabled);
intel_miptree_prepare_access(brw, mt, level, 1, start_layer, layer_count,
aux_usage, aux_usage != ISL_AUX_USAGE_NONE);
}
@ -2638,12 +2632,12 @@ void
intel_miptree_finish_render(struct brw_context *brw,
struct intel_mipmap_tree *mt, uint32_t level,
uint32_t start_layer, uint32_t layer_count,
bool srgb_enabled)
bool srgb_enabled, bool blend_enabled)
{
assert(_mesa_is_format_color_format(mt->format));
enum isl_aux_usage aux_usage =
intel_miptree_render_aux_usage(brw, mt, srgb_enabled);
intel_miptree_render_aux_usage(brw, mt, srgb_enabled, blend_enabled);
intel_miptree_finish_write(brw, mt, level, start_layer, layer_count,
aux_usage);
}

6
src/mesa/drivers/dri/i965/intel_mipmap_tree.h
View File

@ -630,17 +630,17 @@ intel_miptree_prepare_fb_fetch(struct brw_context *brw,
enum isl_aux_usage
intel_miptree_render_aux_usage(struct brw_context *brw,
struct intel_mipmap_tree *mt,
bool srgb_enabled);
bool srgb_enabled, bool blend_enabled);
void
intel_miptree_prepare_render(struct brw_context *brw,
struct intel_mipmap_tree *mt, uint32_t level,
uint32_t start_layer, uint32_t layer_count,
bool srgb_enabled);
bool srgb_enabled, bool blend_enabled);
void
intel_miptree_finish_render(struct brw_context *brw,
struct intel_mipmap_tree *mt, uint32_t level,
uint32_t start_layer, uint32_t layer_count,
bool srgb_enabled);
bool srgb_enabled, bool blend_enabled);
void
intel_miptree_prepare_depth(struct brw_context *brw,
struct intel_mipmap_tree *mt, uint32_t level,