diff --git a/src/amd/vulkan/radv_shader.c b/src/amd/vulkan/radv_shader.c
index 8c21dde0145..a8680e8536b 100644
--- a/src/amd/vulkan/radv_shader.c
+++ b/src/amd/vulkan/radv_shader.c
@@ -3739,8 +3739,15 @@ radv_compute_spi_ps_input(const struct radv_physical_device *pdev, const struct
       /* At least one of PERSP_* (0xF) or LINEAR_* (0x70) or LINE_STIPPLE_TEX must be enabled.
        * LINE_STIPPLE_TEX uses the least number of initialized VGPRs, so let's use it because
        * pixel throughput is limited by the number of initialized VGPRs.
+       *
+       * We can't set LINE_STIPPLE_TEX on GFX12 because it reduces primitive throughput to only
+       * 1 SE. Other gens are fine (tested on Navi10, Navi21, Navi31).
+       * TODO: Test Strix Halo.
        */
-      spi_ps_input |= S_0286CC_LINE_STIPPLE_TEX_ENA(1);
+      if (pdev->info.gfx_level == GFX12)
+         spi_ps_input |= S_0286CC_PERSP_SAMPLE_ENA(1);
+      else
+         spi_ps_input |= S_0286CC_LINE_STIPPLE_TEX_ENA(1);
    }
 
    return spi_ps_input;
diff --git a/src/gallium/drivers/radeonsi/si_shader_variant_info.c b/src/gallium/drivers/radeonsi/si_shader_variant_info.c
index 96fc1bf8642..347f2b7f54f 100644
--- a/src/gallium/drivers/radeonsi/si_shader_variant_info.c
+++ b/src/gallium/drivers/radeonsi/si_shader_variant_info.c
@@ -525,11 +525,16 @@ void si_fixup_spi_ps_input_config(struct si_shader *shader)
 
    /* At least one pair of barycentric coordinates or LINE_STIPPLE_TEX_ENA must be enabled.
     * Since LINE_STIPPLE_TEX_ENA is the only one that loads only 1 VGPR, use it.
+    *
+    * We can't set LINE_STIPPLE_TEX_ENA on GFX12 because it reduces primitive throughput to only
+    * 1 SE. Other gens are fine (tested on Navi10, Navi21, Navi31).
+    * TODO: Test Strix Halo.
     */
    if (!(shader->config.spi_ps_input_ena & 0x7f) &&
        !G_0286CC_LINE_STIPPLE_TEX_ENA(shader->config.spi_ps_input_ena)) {
       /* LLVM sets PERSP_SAMPLE_ENA in this case, so we have to do the same. */
-      if (shader->selector->info.base.use_aco_amd)
+      if (shader->selector->info.base.use_aco_amd &&
+          shader->selector->screen->info.gfx_level != GFX12)
          shader->config.spi_ps_input_ena |= S_0286CC_LINE_STIPPLE_TEX_ENA(1);
       else
          shader->config.spi_ps_input_ena |= S_0286CC_PERSP_SAMPLE_ENA(1);