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-rw-r--r--src/mesa/drivers/dri/i965/brw_defines.h2
-rw-r--r--src/mesa/drivers/dri/i965/brw_state_upload.c14
2 files changed, 16 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_defines.h b/src/mesa/drivers/dri/i965/brw_defines.h
index 105fff3548f..26f6ae6b2fc 100644
--- a/src/mesa/drivers/dri/i965/brw_defines.h
+++ b/src/mesa/drivers/dri/i965/brw_defines.h
@@ -1333,6 +1333,8 @@ enum brw_pixel_shader_coverage_mask_mode {
/* DW2: start address */
/* DW3: end address. */
+#define _3DSTATE_3D_MODE 0x791e
+
#define CMD_MI_FLUSH 0x0200
# define BLT_X_SHIFT 0
diff --git a/src/mesa/drivers/dri/i965/brw_state_upload.c b/src/mesa/drivers/dri/i965/brw_state_upload.c
index 9e64213c2e7..f54e15e92bf 100644
--- a/src/mesa/drivers/dri/i965/brw_state_upload.c
+++ b/src/mesa/drivers/dri/i965/brw_state_upload.c
@@ -66,6 +66,20 @@ brw_upload_initial_gpu_state(struct brw_context *brw)
brw_load_register_imm32(brw, GEN10_CACHE_MODE_SS,
REG_MASK(GEN10_FLOAT_BLEND_OPTIMIZATION_ENABLE) |
GEN10_FLOAT_BLEND_OPTIMIZATION_ENABLE);
+
+ /* From gen10 workaround table in h/w specs:
+ *
+ * "On 3DSTATE_3D_MODE, driver must always program bits 31:16 of DW1
+ * a value of 0xFFFF"
+ *
+ * This means that we end up setting the entire 3D_MODE state. Bits
+ * in this register control things such as slice hashing and we want
+ * the default values of zero at the moment.
+ */
+ BEGIN_BATCH(2);
+ OUT_BATCH(_3DSTATE_3D_MODE << 16 | (2 - 2));
+ OUT_BATCH(0xFFFF << 16);
+ ADVANCE_BATCH();
}
if (devinfo->gen == 9) {