[Mesa-dev] [PATCH 1/2] radv: add a predicate for reflecting DCC decompression state

[Bas Nieuwenhuizen]

So to complicate things, drawing with DCC enabled also compresses
things again. (maybe set it on framebuffer CB emit time?)

On Thu, Nov 22, 2018 at 1:47 PM Samuel Pitoiset
<samuel.pitoiset at gmail.com> wrote:
>
> It's somehow similar to the FCE predicate.
>
> Signed-off-by: Samuel Pitoiset <samuel.pitoiset at gmail.com>
> ---
>  src/amd/vulkan/radv_cmd_buffer.c      | 23 +++++++++++++++++++++++
>  src/amd/vulkan/radv_image.c           |  3 ++-
>  src/amd/vulkan/radv_meta_clear.c      |  3 +++
>  src/amd/vulkan/radv_meta_fast_clear.c |  7 +++++++
>  src/amd/vulkan/radv_private.h         |  4 ++++
>  5 files changed, 39 insertions(+), 1 deletion(-)
>
> diff --git a/src/amd/vulkan/radv_cmd_buffer.c b/src/amd/vulkan/radv_cmd_buffer.c
> index f13768b4ada..50216b0ffdf 100644
> --- a/src/amd/vulkan/radv_cmd_buffer.c
> +++ b/src/amd/vulkan/radv_cmd_buffer.c
> @@ -1363,6 +1363,29 @@ radv_update_fce_metadata(struct radv_cmd_buffer *cmd_buffer,
>         radeon_emit(cmd_buffer->cs, pred_val >> 32);
>  }
>
> +/**
> + * Update the DCC predicate to reflect the compression state.
> + */
> +void
> +radv_update_dcc_metadata(struct radv_cmd_buffer *cmd_buffer,
> +                        struct radv_image *image, bool value)
> +{
> +       uint64_t pred_val = value;
> +       uint64_t va = radv_buffer_get_va(image->bo);
> +       va += image->offset + image->dcc_pred_offset;
> +
> +       assert(radv_image_has_dcc(image));
> +
> +       radeon_emit(cmd_buffer->cs, PKT3(PKT3_WRITE_DATA, 4, 0));
> +       radeon_emit(cmd_buffer->cs, S_370_DST_SEL(V_370_MEM_ASYNC) |
> +                                   S_370_WR_CONFIRM(1) |
> +                                   S_370_ENGINE_SEL(V_370_PFP));
> +       radeon_emit(cmd_buffer->cs, va);
> +       radeon_emit(cmd_buffer->cs, va >> 32);
> +       radeon_emit(cmd_buffer->cs, pred_val);
> +       radeon_emit(cmd_buffer->cs, pred_val >> 32);
> +}
> +
>  /**
>   * Update the fast clear color values if the image is bound as a color buffer.
>   */
> diff --git a/src/amd/vulkan/radv_image.c b/src/amd/vulkan/radv_image.c
> index 7492bf48b51..ebde5519d29 100644
> --- a/src/amd/vulkan/radv_image.c
> +++ b/src/amd/vulkan/radv_image.c
> @@ -858,7 +858,8 @@ radv_image_alloc_dcc(struct radv_image *image)
>         /* + 16 for storing the clear values + dcc pred */
>         image->clear_value_offset = image->dcc_offset + image->surface.dcc_size;
>         image->fce_pred_offset = image->clear_value_offset + 8;
> -       image->size = image->dcc_offset + image->surface.dcc_size + 16;
> +       image->dcc_pred_offset = image->clear_value_offset + 16;
> +       image->size = image->clear_value_offset + 24;
>         image->alignment = MAX2(image->alignment, image->surface.dcc_alignment);
>  }
>
> diff --git a/src/amd/vulkan/radv_meta_clear.c b/src/amd/vulkan/radv_meta_clear.c
> index bf88d3a84d9..787f9f178fa 100644
> --- a/src/amd/vulkan/radv_meta_clear.c
> +++ b/src/amd/vulkan/radv_meta_clear.c
> @@ -1248,6 +1248,9 @@ uint32_t
>  radv_clear_dcc(struct radv_cmd_buffer *cmd_buffer,
>                struct radv_image *image, uint32_t value)
>  {
> +       /* Mark the image as being compressed. */
> +       radv_update_dcc_metadata(cmd_buffer, image, true);
> +
>         return radv_fill_buffer(cmd_buffer, image->bo,
>                                 image->offset + image->dcc_offset,
>                                 image->surface.dcc_size, value);
> diff --git a/src/amd/vulkan/radv_meta_fast_clear.c b/src/amd/vulkan/radv_meta_fast_clear.c
> index a54b78c2a6c..ce088d7332b 100644
> --- a/src/amd/vulkan/radv_meta_fast_clear.c
> +++ b/src/amd/vulkan/radv_meta_fast_clear.c
> @@ -715,6 +715,10 @@ radv_emit_color_decompress(struct radv_cmd_buffer *cmd_buffer,
>                  * FMASK and DCC also imply a fast-clear eliminate.
>                  */
>                 radv_update_fce_metadata(cmd_buffer, image, false);
> +
> +               /* Mark the image as being decompressed. */
> +               if (decompress_dcc)
> +                       radv_update_dcc_metadata(cmd_buffer, image, false);
>         }
>
>         radv_meta_restore(&saved_state, cmd_buffer);
> @@ -811,6 +815,9 @@ radv_decompress_dcc_compute(struct radv_cmd_buffer *cmd_buffer,
>
>         radv_unaligned_dispatch(cmd_buffer, image->info.width, image->info.height, 1);
>
> +       /* Mark this image as actually being decompressed. */
> +       radv_update_dcc_metadata(cmd_buffer, image, false);
> +
>         /* The fill buffer below does its own saving */
>         radv_meta_restore(&saved_state, cmd_buffer);
>
> diff --git a/src/amd/vulkan/radv_private.h b/src/amd/vulkan/radv_private.h
> index ac756f2c247..e67f3ac1cd1 100644
> --- a/src/amd/vulkan/radv_private.h
> +++ b/src/amd/vulkan/radv_private.h
> @@ -1206,6 +1206,9 @@ void radv_update_color_clear_metadata(struct radv_cmd_buffer *cmd_buffer,
>  void radv_update_fce_metadata(struct radv_cmd_buffer *cmd_buffer,
>                               struct radv_image *image, bool value);
>
> +void radv_update_dcc_metadata(struct radv_cmd_buffer *cmd_buffer,
> +                             struct radv_image *image, bool value);
> +
>  uint32_t radv_fill_buffer(struct radv_cmd_buffer *cmd_buffer,
>                           struct radeon_winsys_bo *bo,
>                           uint64_t offset, uint64_t size, uint32_t value);
> @@ -1502,6 +1505,7 @@ struct radv_image {
>         struct radv_cmask_info cmask;
>         uint64_t clear_value_offset;
>         uint64_t fce_pred_offset;
> +       uint64_t dcc_pred_offset;
>
>         /* For VK_ANDROID_native_buffer, the WSI image owns the memory, */
>         VkDeviceMemory owned_memory;
> --
> 2.19.1
>
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