gallium: add PIPE_CAP_MAX_SHADER_PATCH_VARYINGS

Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>

src/gallium/docs/source/screen.rst

@@ -254,6 +254,10 @@ The integer capabilities:
   and size must be page-aligned.
 * ``PIPE_CAP_DEVICE_RESET_STATUS_QUERY``:
   Whether pipe_context::get_device_reset_status is implemented.
+* ``PIPE_CAP_MAX_SHADER_PATCH_VARYINGS``:
+  How many per-patch outputs and inputs are supported between tessellation
+  control and tessellation evaluation shaders, not counting in TESSINNER and
+  TESSOUTER. The minimum allowed value for OpenGL is 30.
 
 
 .. _pipe_capf:

src/gallium/drivers/freedreno/freedreno_screen.c

@@ -219,6 +219,7 @@ fd_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
 	case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
 	case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
 	case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
+	case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
 		return 0;
 
 	case PIPE_CAP_MAX_VIEWPORTS:

src/gallium/drivers/i915/i915_screen.c

@@ -243,6 +243,7 @@ i915_get_param(struct pipe_screen *screen, enum pipe_cap cap)
    case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
    case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
    case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
+   case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
       return 0;
 
    case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:

src/gallium/drivers/ilo/ilo_screen.c

@@ -465,6 +465,7 @@ ilo_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
    case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
    case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
+   case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
       return 0;
 
    case PIPE_CAP_VENDOR_ID:

src/gallium/drivers/llvmpipe/lp_screen.c

@@ -292,6 +292,7 @@ llvmpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
    case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
    case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
+   case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
       return 0;
    }
    /* should only get here on unhandled cases */

src/gallium/drivers/nouveau/nv30/nv30_screen.c

@@ -163,6 +163,7 @@ nv30_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
    case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
    case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
+   case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
       return 0;
 
    case PIPE_CAP_VENDOR_ID:

src/gallium/drivers/nouveau/nv50/nv50_screen.c

@@ -210,6 +210,7 @@ nv50_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_MULTISAMPLE_Z_RESOLVE: /* potentially supported on some hw */
    case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
    case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
+   case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
       return 0;
 
    case PIPE_CAP_VENDOR_ID:

src/gallium/drivers/nouveau/nvc0/nvc0_screen.c

@@ -195,6 +195,7 @@ nvc0_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_VERTEXID_NOBASE:
    case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
    case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
+   case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
       return 0;
 
    case PIPE_CAP_VENDOR_ID:

src/gallium/drivers/r300/r300_screen.c

@@ -191,6 +191,7 @@ static int r300_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
         case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
         case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
         case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
+        case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
             return 0;
 
         /* SWTCL-only features. */

src/gallium/drivers/r600/r600_pipe.c

@@ -335,6 +335,7 @@ static int r600_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
 	case PIPE_CAP_CONDITIONAL_RENDER_INVERTED:
 	case PIPE_CAP_SAMPLER_VIEW_TARGET:
 	case PIPE_CAP_VERTEXID_NOBASE:
+	case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
 		return 0;
 
 	/* Stream output. */

src/gallium/drivers/radeonsi/si_pipe.c

@@ -297,6 +297,7 @@ static int si_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
 	case PIPE_CAP_CONDITIONAL_RENDER_INVERTED:
 	case PIPE_CAP_SAMPLER_VIEW_TARGET:
 	case PIPE_CAP_VERTEXID_NOBASE:
+	case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
 		return 0;
 
 	case PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK:

src/gallium/drivers/softpipe/sp_screen.c

@@ -242,6 +242,7 @@ softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
    case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
    case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
+   case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
       return 0;
    }
    /* should only get here on unhandled cases */

src/gallium/drivers/svga/svga_screen.c

@@ -309,6 +309,7 @@ svga_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_UMA:
    case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
    case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
+   case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
       return 0;
    }
 

src/gallium/drivers/vc4/vc4_screen.c

@@ -176,6 +176,7 @@ vc4_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
         case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
         case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
         case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
+	case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
                 return 0;
 
                 /* Stream output. */

src/gallium/include/pipe/p_defines.h

@@ -605,6 +605,7 @@ enum pipe_cap
    PIPE_CAP_MULTISAMPLE_Z_RESOLVE,
    PIPE_CAP_RESOURCE_FROM_USER_MEMORY,
    PIPE_CAP_DEVICE_RESET_STATUS_QUERY,
+   PIPE_CAP_MAX_SHADER_PATCH_VARYINGS,
 };
 
 #define PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_NV50 (1 << 0)