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

[Marek Olšák]

From: Marek Olšák <marek.olsak at amd.com>

Reviewed-by: Edmondo Tommasina <edmondo.tommasina at gmail.com>
Reviewed-by: Alex Deucher <alexander.deucher at amd.com>
Reviewed-by: Edward O'Callaghan <funfunctor at folklore1984.net>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle at amd.com>
Cc: 12.0 <mesa-stable at lists.freedesktop.org>
---
 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 e59bafe..632839f 100644
--- a/src/gallium/drivers/radeonsi/si_compute.c
+++ b/src/gallium/drivers/radeonsi/si_compute.c
@@ -251,7 +251,12 @@ static void si_initialize_compute(struct si_context *sctx)
 		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;
-- 
2.7.4