r300g: disallow A16F,L16F,LA16F,I16F texture formats on DRM<2.8.0

src/gallium/drivers/r300/r300_screen.c

@@ -327,9 +327,14 @@ static boolean r300_is_format_supported(struct pipe_screen* screen,
                        format == PIPE_FORMAT_RGTC2_SNORM ||
                        format == PIPE_FORMAT_LATC2_UNORM ||
                        format == PIPE_FORMAT_LATC2_SNORM;
-    boolean is_r16f_rg16f = format == PIPE_FORMAT_R16_FLOAT ||
-                            format == PIPE_FORMAT_R16G16_FLOAT;
-    boolean is_half_float = is_r16f_rg16f ||
+    boolean is_x16f_xy16f = format == PIPE_FORMAT_R16_FLOAT ||
+                            format == PIPE_FORMAT_R16G16_FLOAT ||
+                            format == PIPE_FORMAT_A16_FLOAT ||
+                            format == PIPE_FORMAT_L16_FLOAT ||
+                            format == PIPE_FORMAT_L16A16_FLOAT ||
+                            format == PIPE_FORMAT_I16_FLOAT;
+    boolean is_half_float = format == PIPE_FORMAT_R16_FLOAT ||
+                            format == PIPE_FORMAT_R16G16_FLOAT ||
                             format == PIPE_FORMAT_R16G16B16_FLOAT ||
                             format == PIPE_FORMAT_R16G16B16A16_FLOAT;
 
@@ -365,7 +370,7 @@ static boolean r300_is_format_supported(struct pipe_screen* screen,
         /* ATI2N is supported on r4xx-r5xx. */
         (is_r400 || is_r500 || !is_ati2n) &&
         /* R16F and RG16F texture support was added in as late as DRM 2.8.0 */
-        (drm_2_8_0 || !is_r16f_rg16f) &&
+        (drm_2_8_0 || !is_x16f_xy16f) &&
         r300_is_sampler_format_supported(format)) {
         retval |= PIPE_BIND_SAMPLER_VIEW;
     }