[Mesa-dev] [PATCH] i965: Set max texture buffer size to hardware limit

[Kenneth Graunke]

On Wednesday, June 03, 2015 12:22:43 PM Chris Forbes wrote:
> Previously we were leaving this at the default of 64K, which meets the
> spec but is too small for some real uses. The hardware can handle up to
> 128M.
> 
> User was complaining about this on freenode ##OpenGL today.
> 
> Signed-off-by: Chris Forbes <chrisf at ijw.co.nz>
> ---
>  src/mesa/drivers/dri/i965/brw_context.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/src/mesa/drivers/dri/i965/brw_context.c b/src/mesa/drivers/dri/i965/brw_context.c
> index 673529a..b2b119a 100644
> --- a/src/mesa/drivers/dri/i965/brw_context.c
> +++ b/src/mesa/drivers/dri/i965/brw_context.c
> @@ -545,6 +545,7 @@ brw_initialize_context_constants(struct brw_context *brw)
>      */
>     ctx->Const.UniformBufferOffsetAlignment = 16;
>     ctx->Const.TextureBufferOffsetAlignment = 16;
> +   ctx->Const.MaxTextureBufferSize = 128 * 1024 * 1024;
>  
>     if (brw->gen >= 6) {
>        ctx->Const.MaxVarying = 32;
> 

2^27 looks correct to me (based on the RENDER_SURFACE_STATE Height field
programming note).  I checked the 965 PRM and the BDW PRM.

Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>
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