radeonsi: disable primitive binning on Vega10 (v2)

Our driver implementation is known to decrease performance for some tests,
but we don't know if any apps and benchmarks (e.g. those tested by Phoronix)
are affected. This disables the feature just to be safe.

Set this to enable partial primitive binning:
    R600_DEBUG=dpbb
Set this to enable full primitive binning:
    R600_DEBUG=dpbb,dfsm

v2: add new debug options

Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>

src/gallium/drivers/radeon/r600_pipe_common.c

@@ -785,6 +785,8 @@ static const struct debug_named_value common_debug_options[] = {
 	{ "nodccfb", DBG(NO_DCC_FB), "Disable separate DCC on the main framebuffer" },
 	{ "nodpbb", DBG(NO_DPBB), "Disable DPBB." },
 	{ "nodfsm", DBG(NO_DFSM), "Disable DFSM." },
+	{ "dpbb", DBG(DPBB), "Enable DPBB." },
+	{ "dfsm", DBG(DFSM), "Enable DFSM." },
 	{ "nooutoforder", DBG(NO_OUT_OF_ORDER), "Disable out-of-order rasterization" },
 
 	DEBUG_NAMED_VALUE_END /* must be last */

src/gallium/drivers/radeon/r600_pipe_common.h

@@ -113,6 +113,8 @@ enum {
 	DBG_NO_OUT_OF_ORDER,
 	DBG_NO_DPBB,
 	DBG_NO_DFSM,
+	DBG_DPBB,
+	DBG_DFSM,
 	DBG_NO_HYPERZ,
 	DBG_NO_RB_PLUS,
 	DBG_NO_2D_TILING,

src/gallium/drivers/radeonsi/si_pipe.c

@@ -1072,10 +1072,21 @@ struct pipe_screen *radeonsi_screen_create(struct radeon_winsys *ws,
 					    sscreen->b.family <= CHIP_POLARIS12) ||
 					   sscreen->b.family == CHIP_VEGA10 ||
 					   sscreen->b.family == CHIP_RAVEN;
-	sscreen->dpbb_allowed = sscreen->b.chip_class >= GFX9 &&
-				!(sscreen->b.debug_flags & DBG(NO_DPBB));
-	sscreen->dfsm_allowed = sscreen->dpbb_allowed &&
-				!(sscreen->b.debug_flags & DBG(NO_DFSM));
+
+	if (sscreen->b.debug_flags & DBG(DPBB)) {
+		sscreen->dpbb_allowed = true;
+	} else {
+		/* Only enable primitive binning on Raven by default. */
+		sscreen->dpbb_allowed = sscreen->b.family == CHIP_RAVEN &&
+					!(sscreen->b.debug_flags & DBG(NO_DPBB));
+	}
+
+	if (sscreen->b.debug_flags & DBG(DFSM)) {
+		sscreen->dfsm_allowed = sscreen->dpbb_allowed;
+	} else {
+		sscreen->dfsm_allowed = sscreen->dpbb_allowed &&
+					!(sscreen->b.debug_flags & DBG(NO_DFSM));
+	}
 
 	/* While it would be nice not to have this flag, we are constrained
 	 * by the reality that LLVM 5.0 doesn't have working VGPR indexing