gallium: remove PIPE_CAP_MAX_COMBINED_SAMPLERS

This can be derived from the shader caps.

All GPUs from ATI/AMD, NVIDIA, and INTEL have separate texture slots
for each shader stage.

src/gallium/docs/source/screen.rst

@@ -53,8 +53,6 @@ The integer capabilities:
   opcodes to the Shader Model 3 specification. XXX oh god this is horrible
 * ``PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS``: The maximum number of stream buffers.
 * ``PIPE_CAP_PRIMITIVE_RESTART``: Whether primitive restart is supported.
-* ``PIPE_CAP_MAX_COMBINED_SAMPLERS``: The total number of samplers accessible from
-  the vertex and fragment shader, inclusive.
 * ``PIPE_CAP_INDEP_BLEND_ENABLE``: Whether per-rendertarget blend enabling and channel
   masks are supported. If 0, then the first rendertarget's blend mask is
   replicated across all MRTs.

src/gallium/drivers/freedreno/freedreno_screen.c

@@ -219,8 +219,6 @@ fd_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
 		return MAX_MIP_LEVELS;
 	case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
 		return 9192;
-	case PIPE_CAP_MAX_COMBINED_SAMPLERS:
-		return 20;
 
 	/* Render targets. */
 	case PIPE_CAP_MAX_RENDER_TARGETS:

src/gallium/drivers/i915/i915_screen.c

@@ -240,13 +240,6 @@ i915_get_param(struct pipe_screen *screen, enum pipe_cap cap)
       return is->debug.lie ? 1 : 0;
 
    /* Texturing. */
-   case PIPE_CAP_MAX_COMBINED_SAMPLERS:
-      return i915_get_shader_param(screen,
-                                   PIPE_SHADER_VERTEX,
-                                   PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS) +
-             i915_get_shader_param(screen,
-                                   PIPE_SHADER_FRAGMENT,
-                                   PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS);
    case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
       return I915_MAX_TEXTURE_2D_LEVELS;
    case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:

src/gallium/drivers/ilo/ilo_screen.c

@@ -338,8 +338,6 @@ ilo_get_param(struct pipe_screen *screen, enum pipe_cap param)
       return ILO_MAX_SO_BUFFERS;
    case PIPE_CAP_PRIMITIVE_RESTART:
       return true;
-   case PIPE_CAP_MAX_COMBINED_SAMPLERS:
-      return ILO_MAX_SAMPLERS * 2;
    case PIPE_CAP_INDEP_BLEND_ENABLE:
    case PIPE_CAP_INDEP_BLEND_FUNC:
       return true;

src/gallium/drivers/llvmpipe/lp_screen.c

@@ -106,8 +106,6 @@ static int
 llvmpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
 {
    switch (param) {
-   case PIPE_CAP_MAX_COMBINED_SAMPLERS:
-      return 2 * PIPE_MAX_SAMPLERS;  /* VS + FS samplers */
    case PIPE_CAP_NPOT_TEXTURES:
    case PIPE_CAP_MIXED_FRAMEBUFFER_SIZES:
       return 1;

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

@@ -60,8 +60,6 @@ nv30_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
       return 10;
    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
       return 13;
-   case PIPE_CAP_MAX_COMBINED_SAMPLERS:
-      return 16;
    case PIPE_CAP_GLSL_FEATURE_LEVEL:
       return 120;
    /* supported capabilities */

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

@@ -85,8 +85,6 @@ nv50_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    const uint16_t class_3d = nouveau_screen(pscreen)->class_3d;
 
    switch (param) {
-   case PIPE_CAP_MAX_COMBINED_SAMPLERS:
-      return 64;
    case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
       return 14;
    case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:

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

@@ -71,8 +71,6 @@ nvc0_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    const uint16_t class_3d = nouveau_screen(pscreen)->class_3d;
 
    switch (param) {
-   case PIPE_CAP_MAX_COMBINED_SAMPLERS:
-      return 16 * 5;
    case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
       return 15;

src/gallium/drivers/r300/r300_screen.c

@@ -180,8 +180,6 @@ static int r300_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
             return 0;
 
         /* Texturing. */
-        case PIPE_CAP_MAX_COMBINED_SAMPLERS:
-            return r300screen->caps.num_tex_units;
         case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
         case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
         case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:

src/gallium/drivers/r600/r600_pipe.c

@@ -415,8 +415,6 @@ static int r600_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
 	case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
 		return rscreen->b.info.drm_minor >= 9 ?
 			(family >= CHIP_CEDAR ? 16384 : 8192) : 0;
-	case PIPE_CAP_MAX_COMBINED_SAMPLERS:
-		return 32;
 
 	/* Render targets. */
 	case PIPE_CAP_MAX_RENDER_TARGETS:

src/gallium/drivers/radeonsi/si_pipe.c

@@ -306,8 +306,6 @@ static int si_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
 			return 15;
 	case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
 		return 16384;
-	case PIPE_CAP_MAX_COMBINED_SAMPLERS:
-		return HAVE_LLVM >= 0x0305 ? 48 : 32;
 
 	/* Render targets. */
 	case PIPE_CAP_MAX_RENDER_TARGETS:

src/gallium/drivers/softpipe/sp_screen.c

@@ -66,8 +66,6 @@ static int
 softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
 {
    switch (param) {
-   case PIPE_CAP_MAX_COMBINED_SAMPLERS:
-      return 2 * PIPE_MAX_SAMPLERS;  /* VS + FS */
    case PIPE_CAP_NPOT_TEXTURES:
    case PIPE_CAP_MIXED_FRAMEBUFFER_SIZES:
       return 1;

src/gallium/drivers/svga/svga_screen.c

@@ -139,8 +139,6 @@ svga_get_param(struct pipe_screen *screen, enum pipe_cap param)
    SVGA3dDevCapResult result;
 
    switch (param) {
-   case PIPE_CAP_MAX_COMBINED_SAMPLERS:
-      return 16;
    case PIPE_CAP_NPOT_TEXTURES:
    case PIPE_CAP_MIXED_FRAMEBUFFER_SIZES:
       return 1;

src/gallium/include/pipe/p_defines.h

@@ -469,9 +469,6 @@ enum pipe_cap {
    PIPE_CAP_SM3 = 29,  /*< Shader Model, supported */
    PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS = 30,
    PIPE_CAP_PRIMITIVE_RESTART = 31,
-   /** Maximum texture image units accessible from vertex and fragment shaders
-    * combined */
-   PIPE_CAP_MAX_COMBINED_SAMPLERS = 32,
    /** blend enables and write masks per rendertarget */
    PIPE_CAP_INDEP_BLEND_ENABLE = 33,
    /** different blend funcs per rendertarget */

src/mesa/state_tracker/st_extensions.c

@@ -89,10 +89,6 @@ void st_init_limits(struct st_context *st)
    c->MaxArrayTextureLayers
       = screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS);
 
-   c->MaxCombinedTextureImageUnits
-      = _min(screen->get_param(screen, PIPE_CAP_MAX_COMBINED_SAMPLERS),
-             MAX_COMBINED_TEXTURE_IMAGE_UNITS);
-
    /* Define max viewport size and max renderbuffer size in terms of
     * max texture size (note: max tex RECT size = max tex 2D size).
     * If this isn't true for some hardware we'll need new PIPE_CAP_ queries.
@@ -243,6 +239,12 @@ void st_init_limits(struct st_context *st)
       options->LowerClipDistance = true;
    }
 
+   c->MaxCombinedTextureImageUnits =
+         _min(c->Program[MESA_SHADER_VERTEX].MaxTextureImageUnits +
+              c->Program[MESA_SHADER_GEOMETRY].MaxTextureImageUnits +
+              c->Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits,
+              MAX_COMBINED_TEXTURE_IMAGE_UNITS);
+
    /* This depends on program constants. */
    c->MaxTextureCoordUnits
       = _min(c->Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits, MAX_TEXTURE_COORD_UNITS);