[Mesa-dev] [PATCH 3/3] panfrost: Stub out ES3 caps/callbacks

[Alyssa Rosenzweig]

Although this is not functional (and the command stream side is not
aiming for ES3 right now), this is enough to run dEQP-GLES3 shader
tests with the version override directive; this is useful, as some ES3
shader feature can occur in ES2 class shaders due to lowering.

Signed-off-by: Alyssa Rosenzweig <alyssa at rosenzweig.io>
---
 src/gallium/drivers/panfrost/pan_context.c | 44 ++++++++++++++++++++++
 src/gallium/drivers/panfrost/pan_screen.c  | 11 +++++-
 2 files changed, 54 insertions(+), 1 deletion(-)

diff --git a/src/gallium/drivers/panfrost/pan_context.c b/src/gallium/drivers/panfrost/pan_context.c
index 46b34adc02f..6ed34a6740b 100644
--- a/src/gallium/drivers/panfrost/pan_context.c
+++ b/src/gallium/drivers/panfrost/pan_context.c
@@ -2449,6 +2449,46 @@ panfrost_get_query_result(struct pipe_context *pipe,
         return true;
 }
 
+static struct pipe_stream_output_target *
+panfrost_create_stream_output_target(struct pipe_context *pctx,
+                                struct pipe_resource *prsc,
+                                unsigned buffer_offset,
+                                unsigned buffer_size)
+{
+        struct pipe_stream_output_target *target;
+
+        target = CALLOC_STRUCT(pipe_stream_output_target);
+
+        if (!target)
+                return NULL;
+
+        pipe_reference_init(&target->reference, 1);
+        pipe_resource_reference(&target->buffer, prsc);
+
+        target->context = pctx;
+        target->buffer_offset = buffer_offset;
+        target->buffer_size = buffer_size;
+
+        return target;
+}
+
+static void
+panfrost_stream_output_target_destroy(struct pipe_context *pctx,
+                                 struct pipe_stream_output_target *target)
+{
+        pipe_resource_reference(&target->buffer, NULL);
+        free(target);
+}
+
+static void
+panfrost_set_stream_output_targets(struct pipe_context *pctx,
+                              unsigned num_targets,
+                              struct pipe_stream_output_target **targets,
+                              const unsigned *offsets)
+{
+        /* STUB */
+}
+
 static void
 panfrost_setup_hardware(struct panfrost_context *ctx)
 {
@@ -2553,6 +2593,10 @@ panfrost_create_context(struct pipe_screen *screen, void *priv, unsigned flags)
         gallium->end_query = panfrost_end_query;
         gallium->get_query_result = panfrost_get_query_result;
 
+        gallium->create_stream_output_target = panfrost_create_stream_output_target;
+        gallium->stream_output_target_destroy = panfrost_stream_output_target_destroy;
+        gallium->set_stream_output_targets = panfrost_set_stream_output_targets;
+
         panfrost_resource_context_init(gallium);
 
         pscreen->driver->init_context(ctx);
diff --git a/src/gallium/drivers/panfrost/pan_screen.c b/src/gallium/drivers/panfrost/pan_screen.c
index 9672048bca8..45569d59535 100644
--- a/src/gallium/drivers/panfrost/pan_screen.c
+++ b/src/gallium/drivers/panfrost/pan_screen.c
@@ -111,6 +111,14 @@ panfrost_get_param(struct pipe_screen *screen, enum pipe_cap param)
         case PIPE_CAP_TEXTURE_SWIZZLE:
                 return 1;
 
+        /* TODO: ES3. We expose these caps so we can access higher dEQP
+         * tests; in actuality they are nonfunctional */
+        case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
+                return 4;
+        case PIPE_CAP_TGSI_INSTANCEID:
+        case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
+                return 1;
+
         case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
         case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
         case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
@@ -285,6 +293,7 @@ panfrost_get_shader_param(struct pipe_screen *screen,
                 return 0;
 
         case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
+                return 0;
         case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
         case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
         case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
@@ -306,7 +315,7 @@ panfrost_get_shader_param(struct pipe_screen *screen,
                 return 16 * 1024 * sizeof(float);
 
         case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
-                return 1;
+                return 4;
 
         case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
                 return 0;
-- 
2.20.1