Mesa (master): virgl: Enable CAP_CLIP_HALFZ if host supports it

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Module: Mesa
Branch: master
Commit: 8657257a6e0f15f5411193de964ba6e512df0f8b
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=8657257a6e0f15f5411193de964ba6e512df0f8b

Author: Gert Wollny <gert.wollny at collabora.com>
Date:   Tue May  7 19:50:46 2019 +0200

virgl: Enable CAP_CLIP_HALFZ if host supports it

On according hosts this enables the piglits as "pass":
  arb_clip_control-*

v2: sync flag with host

Signed-off-by: Gert Wollny <gert.wollny at collabora.com>
Reviewed-by: Chia-I Wu <olvaffe at gmail.com> (v1)
Reviewed-by: Emil Velikov <emil.velikov at collabora.com>

---

 src/gallium/drivers/virgl/virgl_hw.h     | 1 +
 src/gallium/drivers/virgl/virgl_screen.c | 3 ++-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/gallium/drivers/virgl/virgl_hw.h b/src/gallium/drivers/virgl/virgl_hw.h
index bc6803faa03..a01c48dd41f 100644
--- a/src/gallium/drivers/virgl/virgl_hw.h
+++ b/src/gallium/drivers/virgl/virgl_hw.h
@@ -242,6 +242,7 @@ enum virgl_formats {
 #define VIRGL_CAP_INDIRECT_PARAMS      (1 << 22)
 #define VIRGL_CAP_TRANSFORM_FEEDBACK3  (1 << 23)
 #define VIRGL_CAP_INDIRECT_INPUT_ADDR  (1 << 25)
+#define VIRGL_CAP_CLIP_HALFZ           (1 << 27)
 
 
 /* virgl bind flags - these are compatible with mesa 10.5 gallium.
diff --git a/src/gallium/drivers/virgl/virgl_screen.c b/src/gallium/drivers/virgl/virgl_screen.c
index 2880aa3a4dc..29f1b5b20c3 100644
--- a/src/gallium/drivers/virgl/virgl_screen.c
+++ b/src/gallium/drivers/virgl/virgl_screen.c
@@ -280,7 +280,6 @@ virgl_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT:
    case PIPE_CAP_TEXTURE_GATHER_OFFSETS:
    case PIPE_CAP_TGSI_VS_WINDOW_SPACE_POSITION:
-   case PIPE_CAP_CLIP_HALFZ:
    case PIPE_CAP_VERTEXID_NOBASE:
    case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
    case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
@@ -341,6 +340,8 @@ virgl_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_PROGRAMMABLE_SAMPLE_LOCATIONS:
    case PIPE_CAP_MAX_TEXTURE_UPLOAD_MEMORY_BUDGET:
       return 0;
+   case PIPE_CAP_CLIP_HALFZ:
+      return vscreen->caps.caps.v2.capability_bits & VIRGL_CAP_CLIP_HALFZ;
    case PIPE_CAP_MAX_GS_INVOCATIONS:
       return 32;
    case PIPE_CAP_MAX_SHADER_BUFFER_SIZE: