+ /* TODO: Sample size */
+ SET_BIT(fragmeta->unknown2_3, MALI_HAS_MSAA, msaa);
+ SET_BIT(fragmeta->unknown2_4, MALI_NO_MSAA, !msaa);
+
+ /* EXT_shader_framebuffer_fetch requires the shader to be run
+ * per-sample when outputs are read. */
+ bool per_sample = ctx->min_samples > 1 || fs->outputs_read;
+ SET_BIT(fragmeta->unknown2_3, MALI_PER_SAMPLE, msaa && per_sample);
+
+ fragmeta->depth_units = rast->offset_units * 2.0f;
+ fragmeta->depth_factor = rast->offset_scale;
+
+ /* XXX: Which bit is which? Does this maybe allow offseting not-tri? */
+
+ SET_BIT(fragmeta->unknown2_4, MALI_DEPTH_RANGE_A, rast->offset_tri);
+ SET_BIT(fragmeta->unknown2_4, MALI_DEPTH_RANGE_B, rast->offset_tri);
+
+ SET_BIT(fragmeta->unknown2_3, MALI_DEPTH_CLIP_NEAR, rast->depth_clip_near);
+ SET_BIT(fragmeta->unknown2_3, MALI_DEPTH_CLIP_FAR, rast->depth_clip_far);
+
+ SET_BIT(fragmeta->unknown2_4, MALI_STENCIL_TEST,
+ zsa->base.stencil[0].enabled);
+
+ fragmeta->stencil_mask_front = zsa->stencil_mask_front;
+ fragmeta->stencil_mask_back = zsa->stencil_mask_back;
+
+ /* Bottom bits for stencil ref, exactly one word */
+ fragmeta->stencil_front.opaque[0] = zsa->stencil_front.opaque[0] | ctx->stencil_ref.ref_value[0];
+
+ /* If back-stencil is not enabled, use the front values */
+
+ if (zsa->base.stencil[1].enabled)
+ fragmeta->stencil_back.opaque[0] = zsa->stencil_back.opaque[0] | ctx->stencil_ref.ref_value[1];
+ else
+ fragmeta->stencil_back = fragmeta->stencil_front;
+
+ SET_BIT(fragmeta->unknown2_3, MALI_DEPTH_WRITEMASK,
+ zsa->base.depth.writemask);
+
+ fragmeta->unknown2_3 &= ~MALI_DEPTH_FUNC_MASK;
+ fragmeta->unknown2_3 |= MALI_DEPTH_FUNC(panfrost_translate_compare_func(
+ zsa->base.depth.enabled ? zsa->base.depth.func : PIPE_FUNC_ALWAYS));
+
+ SET_BIT(fragmeta->unknown2_4, MALI_NO_DITHER,
+ (dev->quirks & MIDGARD_SFBD) && ctx->blend &&
+ !ctx->blend->base.dither);
+
+ SET_BIT(fragmeta->unknown2_4, MALI_ALPHA_TO_COVERAGE,
+ ctx->blend->base.alpha_to_coverage);
+
+ /* Get blending setup */
+ unsigned rt_count = ctx->pipe_framebuffer.nr_cbufs;
+
+ /* Disable shader execution if we can */
+ if (dev->quirks & MIDGARD_SHADERLESS
+ && !panfrost_fs_required(fs, blend, rt_count)) {
+ fragmeta->shader = 0;
+ fragmeta->attribute_count = 0;
+ fragmeta->varying_count = 0;
+ fragmeta->texture_count = 0;
+ fragmeta->sampler_count = 0;
+
+ /* This feature is not known to work on Bifrost */
+ fragmeta->midgard1.work_count = 1;
+ fragmeta->midgard1.uniform_count = 0;
+ fragmeta->midgard1.uniform_buffer_count = 0;
+ }
+
+ /* If there is a blend shader, work registers are shared. We impose 8
+ * work registers as a limit for blend shaders. Should be lower XXX */
+
+ if (!(dev->quirks & IS_BIFROST)) {
+ for (unsigned c = 0; c < rt_count; ++c) {
+ if (blend[c].is_shader) {
+ fragmeta->midgard1.work_count =
+ MAX2(fragmeta->midgard1.work_count, 8);
+ }
+ }
+ }
+
+ /* Even on MFBD, the shader descriptor gets blend shaders. It's *also*
+ * copied to the blend_meta appended (by convention), but this is the
+ * field actually read by the hardware. (Or maybe both are read...?).
+ * Specify the last RTi with a blend shader. */
+
+ fragmeta->blend.shader = 0;
+
+ for (signed rt = ((signed) rt_count - 1); rt >= 0; --rt) {
+ if (!blend[rt].is_shader)
+ continue;
+
+ fragmeta->blend.shader = blend[rt].shader.gpu |
+ blend[rt].shader.first_tag;
+ break;
+ }
+
+ if (dev->quirks & MIDGARD_SFBD) {
+ /* When only a single render target platform is used, the blend
+ * information is inside the shader meta itself. We additionally
+ * need to signal CAN_DISCARD for nontrivial blend modes (so
+ * we're able to read back the destination buffer) */
+
+ SET_BIT(fragmeta->unknown2_3, MALI_HAS_BLEND_SHADER,
+ blend[0].is_shader);
+
+ if (!blend[0].is_shader) {
+ fragmeta->blend.equation = blend[0].equation.equation;
+ fragmeta->blend.constant = blend[0].equation.constant;
+ }
+
+ SET_BIT(fragmeta->unknown2_3, MALI_CAN_DISCARD,
+ blend[0].load_dest);
+ }
+
+ if (dev->quirks & IS_BIFROST) {
+ bool no_blend = true;
+
+ for (unsigned i = 0; i < rt_count; ++i)
+ no_blend &= (!blend[i].load_dest | blend[i].no_colour);
+
+ SET_BIT(fragmeta->bifrost1.unk1, MALI_BIFROST_EARLY_Z,
+ !fs->can_discard && !fs->writes_depth && no_blend);
+ }
projects / mesa.git / commitdiff