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radeonsi: Don't modify PA_SC_RASTER_CONFIG register value if rb_mask == 0 

E.g. this could happen on older kernels which don't support the
RADEON_INFO_SI_BACKEND_ENABLED_MASK query yet. The code in
si_write_harvested_raster_configs() doesn't deal with this correctly and
would probably mangle the value badly.

Cc: "10.4 10.3" <mesa-stable@lists.freedesktop.org>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Tom Stellard <thomas.stellard@amd.com>
This commit is contained in:
Michel Dänzer 2014-12-09 17:00:32 +09:00 committed by Michel Dänzer
parent 229bf4475f
commit b3057f8097
1 changed files with 4 additions and 2 deletions
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6
src/gallium/drivers/radeonsi/si_state.c
View File

@ -3032,8 +3032,10 @@ void si_init_config(struct si_context *sctx)
break;
}
/* Always use the default config when all backends are enabled. */
if (rb_mask && util_bitcount(rb_mask) >= num_rb) {
/* Always use the default config when all backends are enabled
* (or when we failed to determine the enabled backends).
*/
if (!rb_mask || util_bitcount(rb_mask) >= num_rb) {
si_pm4_set_reg(pm4, R_028350_PA_SC_RASTER_CONFIG,
raster_config);
} else {