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GPU/DMA: Partially implemented the 'enable_2d' bit in the DMA engine.
When not set, this tells the GPU to only use the X size when performing a DMA copy. This is only implemented for linear->linear and tiled->tiled copies. Conversion copies still retain the assert. This bit is unset by some games for various purposes, and by nouveau when copying the vertex buffers.
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1 changed files with 10 additions and 2 deletions
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@ -41,7 +41,6 @@ void MaxwellDMA::HandleCopy() {
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// TODO(Subv): Perform more research and implement all features of this engine.
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ASSERT(regs.exec.enable_swizzle == 0);
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ASSERT(regs.exec.enable_2d == 1);
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ASSERT(regs.exec.query_mode == Regs::QueryMode::None);
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ASSERT(regs.exec.query_intr == Regs::QueryIntr::None);
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ASSERT(regs.exec.copy_mode == Regs::CopyMode::Unk2);
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@ -51,10 +50,19 @@ void MaxwellDMA::HandleCopy() {
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ASSERT(regs.dst_params.pos_y == 0);
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if (regs.exec.is_dst_linear == regs.exec.is_src_linear) {
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Memory::CopyBlock(dest_cpu, source_cpu, regs.x_count * regs.y_count);
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size_t copy_size = regs.x_count;
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// When the enable_2d bit is disabled, the copy is performed as if we were copying a 1D
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// buffer of length `x_count`, otherwise we copy a 2D buffer of size (x_count, y_count).
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if (regs.exec.enable_2d) {
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copy_size = copy_size * regs.y_count;
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}
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Memory::CopyBlock(dest_cpu, source_cpu, copy_size);
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return;
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}
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ASSERT(regs.exec.enable_2d == 1);
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u8* src_buffer = Memory::GetPointer(source_cpu);
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u8* dst_buffer = Memory::GetPointer(dest_cpu);
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