iris: Allow sample mask of 0

I think this was an attempt to work around various sample mask bugs I
had early on.  It's not correct.  A sample mask of 0 is legal and means
to disable all samples.

Fixes dEQP-GLES31.functional.texture.multisample.*.*sample_mask*

diff --git a/src/gallium/drivers/iris/iris_state.c b/src/gallium/drivers/iris/iris_state.c
index 74a84e5065ced4e161bdeb02065754824feaa378..e77c991ecc1559317e8414ecf79a68b4eaa5392f 100644 (file)
--- a/src/gallium/drivers/iris/iris_state.c
+++ b/src/gallium/drivers/iris/iris_state.c
@@ -4316,7 +4316,7 @@ iris_upload_dirty_render_state(struct iris_context *ice,
 
    if (dirty & IRIS_DIRTY_SAMPLE_MASK) {
       iris_emit_cmd(batch, GENX(3DSTATE_SAMPLE_MASK), ms) {
-         ms.SampleMask = MAX2(ice->state.sample_mask, 1);
+         ms.SampleMask = ice->state.sample_mask;
       }
    }