vc4: Add support for multisample framebuffer operations.

This includes GL_SAMPLE_COVERAGE, GL_SAMPLE_ALPHA_TO_ONE, and
GL_SAMPLE_ALPHA_TO_COVAGE.

I haven't implemented a dithering function yet, and gallium doesn't give
me a good chance to do so for GL_SAMPLE_COVERAGE.

1 files changed, 11 insertions, 0 deletions

diff --git a/src/gallium/drivers/vc4/vc4_qpu.h b/src/gallium/drivers/vc4/vc4_qpu.h
index 866ca5c1300..7c4ff1701ca 100644
--- a/src/gallium/drivers/vc4/vc4_qpu.h
+++ b/src/gallium/drivers/vc4/vc4_qpu.h
@@ -116,6 +116,17 @@ qpu_tlbc()
         return r;
 }
 
+static inline struct qpu_reg
+qpu_tlbc_ms()
+{
+        struct qpu_reg r = {
+                QPU_MUX_A,
+                QPU_W_TLB_COLOR_MS,
+        };
+
+        return r;
+}
+
 static inline struct qpu_reg qpu_r0(void) { return qpu_rn(0); }
 static inline struct qpu_reg qpu_r1(void) { return qpu_rn(1); }
 static inline struct qpu_reg qpu_r2(void) { return qpu_rn(2); }