Re: [Mesa-dev] [PATCH 4/5] iris: disable repacking for compression for applicable gen

[Anuj Phogat]

On Thu, Jun 27, 2019 at 9:55 AM Dongwon Kim  wrote:
>
> set bit15 (Disable Rebacking for Compression) of CACHE_MODE_0 register
Repacking
> if the gen attribute, 'disable_ccs_repack' is set.
>
> Signed-off-by: Dongwon Kim 
> ---
>  src/gallium/drivers/iris/iris_state.c | 10 ++
>  1 file changed, 10 insertions(+)
>
> diff --git a/src/gallium/drivers/iris/iris_state.c 
> b/src/gallium/drivers/iris/iris_state.c
> index bf31f31f3e4..ce25f1ffcb3 100644
> --- a/src/gallium/drivers/iris/iris_state.c
> +++ b/src/gallium/drivers/iris/iris_state.c
> @@ -755,6 +755,16 @@ iris_init_render_context(struct iris_screen *screen,
>}
>iris_emit_lri(batch, SLICE_COMMON_ECO_CHICKEN1, reg_val);
>
> +  /* hardware specification recommends disabling repacking for
> +   * the compatibility with decompression mechanism in display 
> controller.
> +   */
> +  if (devinfo->disable_ccs_repack) {
> + iris_pack_state(GENX(CACHE_MODE_0), _val, reg) {
> +reg.DisableRepackingforCompression = true;
> +reg.DisableRepackingforCompressionMask = true;
> + }
> + iris_emit_lri(batch, CACHE_MODE_0, reg_val);
> +  }
>
>// XXX: 3D_MODE?
>  #endif
> --
> 2.17.1
>
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[Mesa-dev] [PATCH 4/5] iris: disable repacking for compression for applicable gen

[Dongwon Kim]

set bit15 (Disable Rebacking for Compression) of CACHE_MODE_0 register
if the gen attribute, 'disable_ccs_repack' is set.

Signed-off-by: Dongwon Kim 
---
 src/gallium/drivers/iris/iris_state.c | 10 ++
 1 file changed, 10 insertions(+)

diff --git a/src/gallium/drivers/iris/iris_state.c 
b/src/gallium/drivers/iris/iris_state.c
index bf31f31f3e4..ce25f1ffcb3 100644
--- a/src/gallium/drivers/iris/iris_state.c
+++ b/src/gallium/drivers/iris/iris_state.c
@@ -755,6 +755,16 @@ iris_init_render_context(struct iris_screen *screen,
   }
   iris_emit_lri(batch, SLICE_COMMON_ECO_CHICKEN1, reg_val);
 
+  /* hardware specification recommends disabling repacking for
+   * the compatibility with decompression mechanism in display controller.
+   */
+  if (devinfo->disable_ccs_repack) {
+ iris_pack_state(GENX(CACHE_MODE_0), _val, reg) {
+reg.DisableRepackingforCompression = true;
+reg.DisableRepackingforCompressionMask = true;
+ }
+ iris_emit_lri(batch, CACHE_MODE_0, reg_val);
+  }
 
   // XXX: 3D_MODE?
 #endif
-- 
2.17.1

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