diff --git a/src/amd/common/nir/ac_nir.h b/src/amd/common/nir/ac_nir.h
index 7ae1a9431e6..d4a06f740bd 100644
--- a/src/amd/common/nir/ac_nir.h
+++ b/src/amd/common/nir/ac_nir.h
@@ -277,9 +277,11 @@ typedef struct {
    bool dynamic_rasterization_samples;
    int force_front_face; /* 0 -> keep, 1 -> set to true, -1 -> set to false */
    bool optimize_frag_coord; /* TODO: remove this after RADV can handle it */
+   bool frag_coord_is_center; /* GL requirement for sample shading */
 
    /* frag_coord/pixel_coord:
-    *    allow_pixel_coord && (ps_iter_samples == 1 || force_center_interp_no_msaa ||
+    *    allow_pixel_coord && (frag_coord_is_center || ps_iter_samples == 1 ||
+    *                          force_center_interp_no_msaa ||
     *                          the fractional part of frag_coord.xy isn't used):
     *       * frag_coord.xy is replaced by u2f(pixel_coord) + 0.5.
     *    else:
diff --git a/src/amd/common/nir/ac_nir_lower_ps_early.c b/src/amd/common/nir/ac_nir_lower_ps_early.c
index d2baf33c44d..d084600f2ea 100644
--- a/src/amd/common/nir/ac_nir_lower_ps_early.c
+++ b/src/amd/common/nir/ac_nir_lower_ps_early.c
@@ -392,12 +392,16 @@ lower_ps_intrinsic(nir_builder *b, nir_intrinsic_instr *intrin, void *state)
       }
       break;
    case nir_intrinsic_load_sample_pos:
-      /* Even though we could lower this by unpacking the sample position from user SGPRs, doing
-       * that hasn't shown any performance improvement in piglit/pixel-rate. Note that this is
-       * only used by sample shading.
-       */
-      /* sample_pos = ffract(frag_coord.xy); */
-      nir_def_replace(&intrin->def, nir_ffract(b, nir_channels(b, nir_load_frag_coord(b), 0x3)));
+      if (s->options->frag_coord_is_center) {
+         /* We have to use the alternative way to get sample_pos. */
+         nir_def *num_samples = s->options->load_sample_positions_always_loads_current_ones ?
+                                   nir_undef(b, 1, 32) : nir_load_rasterization_samples_amd(b);
+         nir_def_replace(&intrin->def, nir_load_sample_positions_amd(b, 32, nir_load_sample_id(b),
+                                                                     num_samples));
+      } else {
+         /* sample_pos = ffract(frag_coord.xy); */
+         nir_def_replace(&intrin->def, nir_ffract(b, nir_channels(b, nir_load_frag_coord(b), 0x3)));
+      }
       return true;
    case nir_intrinsic_load_barycentric_at_offset:
       nir_def_replace(&intrin->def,
@@ -532,7 +536,8 @@ gather_info(nir_builder *b, nir_intrinsic_instr *intr, void *state)
       }
       break;
    case nir_intrinsic_load_sample_pos:
-      s->uses_fragcoord_xy_as_float = true;
+      if (!s->options->frag_coord_is_center)
+         s->uses_fragcoord_xy_as_float = true;
       break;
    default:
       break;
@@ -565,7 +570,7 @@ ac_nir_lower_ps_early(nir_shader *nir, const ac_nir_lower_ps_early_options *opti
     * TODO: estimate input VGPRs and don't lower to pixel_coord if their number doesn't decrease to
     * an even number?
     */
-   state.use_fragcoord = state.options->ps_iter_samples != 1 &&
+   state.use_fragcoord = !options->frag_coord_is_center && state.options->ps_iter_samples != 1 &&
                          !state.options->force_center_interp_no_msaa &&
                          state.uses_fragcoord_xy_as_float;