panfrost: Use u_default_get_sample_position

The Mali sample positions are the standard sample positions.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Reviewed-by: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Reviewed-by: Emma Anholt <emma@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22383>

src/gallium/drivers/panfrost/pan_cmdstream.c

@@ -31,6 +31,7 @@
 #include "util/u_helpers.h"
 #include "util/u_memory.h"
 #include "util/u_prim.h"
+#include "util/u_sample_positions.h"
 #include "util/u_vbuf.h"
 #include "util/u_viewport.h"
 
@@ -4391,15 +4392,6 @@ prepare_shader(struct panfrost_compiled_shader *state,
 #endif
 }
 
-static void
-panfrost_get_sample_position(struct pipe_context *context,
-                             unsigned sample_count, unsigned sample_index,
-                             float *out_value)
-{
-   panfrost_query_sample_position(panfrost_sample_pattern(sample_count),
-                                  sample_index, out_value);
-}
-
 static void
 screen_destroy(struct pipe_screen *pscreen)
 {
@@ -4475,7 +4467,7 @@ context_init(struct pipe_context *pipe)
    pipe->create_sampler_state = panfrost_create_sampler_state;
    pipe->create_blend_state = panfrost_create_blend_state;
 
-   pipe->get_sample_position = panfrost_get_sample_position;
+   pipe->get_sample_position = u_default_get_sample_position;
 }
 
 #if PAN_ARCH <= 5

src/panfrost/lib/pan_device.h

@@ -222,8 +222,6 @@ void panfrost_upload_sample_positions(struct panfrost_device *dev);
 
 mali_ptr panfrost_sample_positions(const struct panfrost_device *dev,
                                    enum mali_sample_pattern pattern);
-void panfrost_query_sample_position(enum mali_sample_pattern pattern,
-                                    unsigned sample_idx, float *out);
 
 unsigned panfrost_query_l2_slices(const struct panfrost_device *dev);
 

src/panfrost/lib/pan_samples.c

@@ -151,16 +151,3 @@ panfrost_upload_sample_positions(struct panfrost_device *dev)
    memcpy(dev->sample_positions->ptr.cpu, sample_position_lut,
           sizeof(sample_position_lut));
 }
-
-/* CPU side LUT query, to implement glGetMultisamplefv */
-
-void
-panfrost_query_sample_position(enum mali_sample_pattern pattern,
-                               unsigned sample_idx, float *out)
-{
-   struct mali_sample_position pos =
-      sample_position_lut[pattern].positions[sample_idx];
-
-   out[0] = decode_position(pos.x);
-   out[1] = decode_position(pos.y);
-}