[Mesa-dev] [PATCH] radeonsi: emit TA_CS_BC_BASE_ADDR on SI only if the kernel allows it

[Edward O'Callaghan]

Nice catch.

Reviewed-by: Edward O'Callaghan <funfunctor at folklore1984.net>

On 10/10/2016 10:25 PM, Marek Olšák wrote:
> From: Marek Olšák <marek.olsak at amd.com>
> 
> The kernel patch has been sent to amd-gfx.
> ---
>  src/gallium/drivers/radeonsi/si_compute.c | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
> 
> diff --git a/src/gallium/drivers/radeonsi/si_compute.c b/src/gallium/drivers/radeonsi/si_compute.c
> index 1d1df2f..8a803c9 100644
> --- a/src/gallium/drivers/radeonsi/si_compute.c
> +++ b/src/gallium/drivers/radeonsi/si_compute.c
> @@ -244,21 +244,26 @@ static void si_initialize_compute(struct si_context *sctx)
>  	}
>  
>  	/* Set the pointer to border colors. */
>  	bc_va = sctx->border_color_buffer->gpu_address;
>  
>  	if (sctx->b.chip_class >= CIK) {
>  		radeon_set_uconfig_reg_seq(cs, R_030E00_TA_CS_BC_BASE_ADDR, 2);
>  		radeon_emit(cs, bc_va >> 8);  /* R_030E00_TA_CS_BC_BASE_ADDR */
>  		radeon_emit(cs, bc_va >> 40); /* R_030E04_TA_CS_BC_BASE_ADDR_HI */
>  	} else {
> -		radeon_set_config_reg(cs, R_00950C_TA_CS_BC_BASE_ADDR, bc_va >> 8);
> +		if (sctx->screen->b.info.drm_major == 3 ||
> +		    (sctx->screen->b.info.drm_major == 2 &&
> +		     sctx->screen->b.info.drm_minor >= 48)) {
> +			radeon_set_config_reg(cs, R_00950C_TA_CS_BC_BASE_ADDR,
> +					      bc_va >> 8);
> +		}
>  	}
>  
>  	sctx->cs_shader_state.emitted_program = NULL;
>  	sctx->cs_shader_state.initialized = true;
>  }
>  
>  static bool si_setup_compute_scratch_buffer(struct si_context *sctx,
>                                              struct si_shader *shader,
>                                              struct si_shader_config *config)
>  {
> 

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