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panfrost: Enable helper invocations when texturing 

it turns out we have explicit control over helper invocations; if a
particular bit in the fragment shader descriptor is set, helper
invocations are launched; if it clear, they are not. Helper invocations
are required whenever computing derivatives, whether explicitly
(dFdx/dFdy) *or* implicitly (any texturing). Accordingly, we set this
bit when texturing to fix edge case behaviour (literally, haha).

Thank you to Jason Ekstrand and Ilia Mirkin for pointing out the
representative dEQP test failed along triangle edges and for suggesting
helper invocations / derivatives as a list of suspect pieces (which led
to discovering the helper invocations enable bit in the first place).

Ideally we would use the new NIR analysis pass for this, but that hasn't
landed quite yet.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
This commit is contained in:
Alyssa Rosenzweig 2019-06-07 16:00:49 -07:00
parent 0219b99500
commit 8d1adc091b
4 changed files with 25 additions and 76 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

72
src/gallium/drivers/panfrost/ci/expected-failures.txt
View File

@ -361,44 +361,6 @@ dEQP-GLES2.functional.texture.filtering.2d.linear_mipmap_nearest_nearest_repeat_
dEQP-GLES2.functional.texture.filtering.2d.linear_mipmap_nearest_nearest_repeat_rgb888
dEQP-GLES2.functional.texture.filtering.2d.linear_mipmap_nearest_nearest_repeat_rgba4444
dEQP-GLES2.functional.texture.filtering.2d.linear_mipmap_nearest_nearest_repeat_rgba8888
dEQP-GLES2.functional.texture.filtering.2d.linear_nearest_clamp_etc1
dEQP-GLES2.functional.texture.filtering.2d.linear_nearest_clamp_l8_npot
dEQP-GLES2.functional.texture.filtering.2d.linear_nearest_clamp_l8_pot
dEQP-GLES2.functional.texture.filtering.2d.linear_nearest_clamp_rgb888_npot
dEQP-GLES2.functional.texture.filtering.2d.linear_nearest_clamp_rgb888_pot
dEQP-GLES2.functional.texture.filtering.2d.linear_nearest_clamp_rgba4444_npot
dEQP-GLES2.functional.texture.filtering.2d.linear_nearest_clamp_rgba4444_pot
dEQP-GLES2.functional.texture.filtering.2d.linear_nearest_clamp_rgba8888_npot
dEQP-GLES2.functional.texture.filtering.2d.linear_nearest_clamp_rgba8888_pot
dEQP-GLES2.functional.texture.filtering.2d.linear_nearest_mirror_etc1
dEQP-GLES2.functional.texture.filtering.2d.linear_nearest_mirror_l8_pot
dEQP-GLES2.functional.texture.filtering.2d.linear_nearest_mirror_rgb888_pot
dEQP-GLES2.functional.texture.filtering.2d.linear_nearest_mirror_rgba4444_pot
dEQP-GLES2.functional.texture.filtering.2d.linear_nearest_mirror_rgba8888_pot
dEQP-GLES2.functional.texture.filtering.2d.linear_nearest_repeat_etc1
dEQP-GLES2.functional.texture.filtering.2d.linear_nearest_repeat_l8_pot
dEQP-GLES2.functional.texture.filtering.2d.linear_nearest_repeat_rgb888_pot
dEQP-GLES2.functional.texture.filtering.2d.linear_nearest_repeat_rgba4444_pot
dEQP-GLES2.functional.texture.filtering.2d.linear_nearest_repeat_rgba8888_pot
dEQP-GLES2.functional.texture.filtering.2d.nearest_linear_clamp_etc1
dEQP-GLES2.functional.texture.filtering.2d.nearest_linear_clamp_l8_npot
dEQP-GLES2.functional.texture.filtering.2d.nearest_linear_clamp_l8_pot
dEQP-GLES2.functional.texture.filtering.2d.nearest_linear_clamp_rgb888_npot
dEQP-GLES2.functional.texture.filtering.2d.nearest_linear_clamp_rgb888_pot
dEQP-GLES2.functional.texture.filtering.2d.nearest_linear_clamp_rgba4444_npot
dEQP-GLES2.functional.texture.filtering.2d.nearest_linear_clamp_rgba4444_pot
dEQP-GLES2.functional.texture.filtering.2d.nearest_linear_clamp_rgba8888_npot
dEQP-GLES2.functional.texture.filtering.2d.nearest_linear_clamp_rgba8888_pot
dEQP-GLES2.functional.texture.filtering.2d.nearest_linear_mirror_etc1
dEQP-GLES2.functional.texture.filtering.2d.nearest_linear_mirror_l8_pot
dEQP-GLES2.functional.texture.filtering.2d.nearest_linear_mirror_rgb888_pot
dEQP-GLES2.functional.texture.filtering.2d.nearest_linear_mirror_rgba4444_pot
dEQP-GLES2.functional.texture.filtering.2d.nearest_linear_mirror_rgba8888_pot
dEQP-GLES2.functional.texture.filtering.2d.nearest_linear_repeat_etc1
dEQP-GLES2.functional.texture.filtering.2d.nearest_linear_repeat_l8_pot
dEQP-GLES2.functional.texture.filtering.2d.nearest_linear_repeat_rgb888_pot
dEQP-GLES2.functional.texture.filtering.2d.nearest_linear_repeat_rgba4444_pot
dEQP-GLES2.functional.texture.filtering.2d.nearest_linear_repeat_rgba8888_pot
dEQP-GLES2.functional.texture.filtering.2d.nearest_mipmap_linear_linear_clamp_etc1
dEQP-GLES2.functional.texture.filtering.2d.nearest_mipmap_linear_linear_clamp_rgba8888
dEQP-GLES2.functional.texture.filtering.2d.nearest_mipmap_linear_linear_mirror_etc1
@ -429,40 +391,6 @@ dEQP-GLES2.functional.texture.filtering.2d.nearest_mipmap_nearest_nearest_repeat
dEQP-GLES2.functional.texture.filtering.2d.nearest_mipmap_nearest_nearest_repeat_rgb888
dEQP-GLES2.functional.texture.filtering.2d.nearest_mipmap_nearest_nearest_repeat_rgba4444
dEQP-GLES2.functional.texture.filtering.2d.nearest_mipmap_nearest_nearest_repeat_rgba8888
dEQP-GLES2.functional.texture.filtering.cube.linear_nearest_clamp_etc1
dEQP-GLES2.functional.texture.filtering.cube.linear_nearest_clamp_l8_npot
dEQP-GLES2.functional.texture.filtering.cube.linear_nearest_clamp_l8_pot
dEQP-GLES2.functional.texture.filtering.cube.linear_nearest_clamp_rgb888_npot
dEQP-GLES2.functional.texture.filtering.cube.linear_nearest_clamp_rgb888_pot
dEQP-GLES2.functional.texture.filtering.cube.linear_nearest_clamp_rgba4444_npot
dEQP-GLES2.functional.texture.filtering.cube.linear_nearest_clamp_rgba4444_pot
dEQP-GLES2.functional.texture.filtering.cube.linear_nearest_clamp_rgba8888_npot
dEQP-GLES2.functional.texture.filtering.cube.linear_nearest_clamp_rgba8888_pot
dEQP-GLES2.functional.texture.filtering.cube.linear_nearest_mirror_l8_pot
dEQP-GLES2.functional.texture.filtering.cube.linear_nearest_mirror_rgb888_pot
dEQP-GLES2.functional.texture.filtering.cube.linear_nearest_mirror_rgba4444_pot
dEQP-GLES2.functional.texture.filtering.cube.linear_nearest_mirror_rgba8888_pot
dEQP-GLES2.functional.texture.filtering.cube.linear_nearest_repeat_l8_pot
dEQP-GLES2.functional.texture.filtering.cube.linear_nearest_repeat_rgb888_pot
dEQP-GLES2.functional.texture.filtering.cube.linear_nearest_repeat_rgba4444_pot
dEQP-GLES2.functional.texture.filtering.cube.linear_nearest_repeat_rgba8888_pot
dEQP-GLES2.functional.texture.filtering.cube.nearest_linear_clamp_etc1
dEQP-GLES2.functional.texture.filtering.cube.nearest_linear_clamp_l8_npot
dEQP-GLES2.functional.texture.filtering.cube.nearest_linear_clamp_l8_pot
dEQP-GLES2.functional.texture.filtering.cube.nearest_linear_clamp_rgb888_npot
dEQP-GLES2.functional.texture.filtering.cube.nearest_linear_clamp_rgb888_pot
dEQP-GLES2.functional.texture.filtering.cube.nearest_linear_clamp_rgba4444_npot
dEQP-GLES2.functional.texture.filtering.cube.nearest_linear_clamp_rgba4444_pot
dEQP-GLES2.functional.texture.filtering.cube.nearest_linear_clamp_rgba8888_npot
dEQP-GLES2.functional.texture.filtering.cube.nearest_linear_clamp_rgba8888_pot
dEQP-GLES2.functional.texture.filtering.cube.nearest_linear_mirror_l8_pot
dEQP-GLES2.functional.texture.filtering.cube.nearest_linear_mirror_rgb888_pot
dEQP-GLES2.functional.texture.filtering.cube.nearest_linear_mirror_rgba4444_pot
dEQP-GLES2.functional.texture.filtering.cube.nearest_linear_mirror_rgba8888_pot
dEQP-GLES2.functional.texture.filtering.cube.nearest_linear_repeat_l8_pot
dEQP-GLES2.functional.texture.filtering.cube.nearest_linear_repeat_rgb888_pot
dEQP-GLES2.functional.texture.filtering.cube.nearest_linear_repeat_rgba4444_pot
dEQP-GLES2.functional.texture.filtering.cube.nearest_linear_repeat_rgba8888_pot
dEQP-GLES2.functional.texture.filtering.cube.nearest_mipmap_linear_linear_clamp_etc1
dEQP-GLES2.functional.texture.filtering.cube.nearest_mipmap_linear_linear_clamp_rgba8888
dEQP-GLES2.functional.texture.filtering.cube.nearest_mipmap_linear_linear_mirror_rgba8888

14
src/gallium/drivers/panfrost/include/panfrost-job.h
View File

@ -403,7 +403,19 @@ enum mali_format {
#define MALI_GET_ALPHA_COVERAGE(nibble) ((float) nibble / 15.0f)
/* Applies to unknown1 */
#define MALI_NO_ALPHA_TO_COVERAGE (1 << 10)
/* Should the hardware perform early-Z testing? Normally should be set
* for performance reasons. Clear if you use: discard,
* alpha-to-coverage... * It's also possible this disables
* forward-pixel kill; we're not quite sure which bit is which yet.
* TODO: How does this interact with blending?*/
#define MALI_EARLY_Z (1 << 10)
/* Should the hardware calculate derivatives (via helper invocations)? Set in a
* fragment shader that uses texturing or derivative functions */
#define MALI_HELPER_INVOCATIONS (1 << 11)
/* Flags denoting the fragment shader's use of tilebuffer readback. If the
* shader might read any part of the tilebuffer, set MALI_READS_TILEBUFFER. If

12
src/gallium/drivers/panfrost/pan_context.c
View File

@ -1088,7 +1088,15 @@ panfrost_emit_for_draw(struct panfrost_context *ctx, bool with_vertex_data)
/* Set late due to depending on render state */
/* The one at the end seems to mean "1 UBO" */
ctx->fragment_shader_core.midgard1.unknown1 = MALI_NO_ALPHA_TO_COVERAGE | 0x200 | 0x2201;
unsigned flags = MALI_EARLY_Z | 0x200 | 0x2000 | 0x1;
/* Any time texturing is used, derivatives are implicitly
* calculated, so we need to enable helper invocations */
if (ctx->sampler_view_count[PIPE_SHADER_FRAGMENT])
flags |= MALI_HELPER_INVOCATIONS;
ctx->fragment_shader_core.midgard1.unknown1 = flags;
/* Assign texture/sample count right before upload */
ctx->fragment_shader_core.texture_count = ctx->sampler_view_count[PIPE_SHADER_FRAGMENT];
@ -1107,7 +1115,7 @@ panfrost_emit_for_draw(struct panfrost_context *ctx, bool with_vertex_data)
if (variant->can_discard) {
ctx->fragment_shader_core.unknown2_3 |= MALI_CAN_DISCARD;
ctx->fragment_shader_core.midgard1.unknown1 &= ~MALI_NO_ALPHA_TO_COVERAGE;
ctx->fragment_shader_core.midgard1.unknown1 &= ~MALI_EARLY_Z;
ctx->fragment_shader_core.midgard1.unknown1 |= 0x4000;
ctx->fragment_shader_core.midgard1.unknown1 = 0x4200;
}

3
src/gallium/drivers/panfrost/pandecode/decode.c
View File

@ -223,7 +223,8 @@ static const struct pandecode_flag_info mfbd_extra_flag_info[] = {
#define FLAG_INFO(flag) { MALI_##flag, "MALI_" #flag }
static const struct pandecode_flag_info shader_unknown1_flag_info [] = {
FLAG_INFO(NO_ALPHA_TO_COVERAGE),
FLAG_INFO(EARLY_Z),
FLAG_INFO(HELPER_INVOCATIONS),
FLAG_INFO(READS_TILEBUFFER),
FLAG_INFO(READS_ZS),
{}