pan/decode: Identify layered MSAA flag

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5782>

src/panfrost/include/panfrost-job.h

@@ -1673,8 +1673,12 @@ struct mali_single_framebuffer {
         /* More below this, maybe */
 } __attribute__((packed));
 
-/* Format bits for the render target flags */
+/* Format bits for the render target flags. Setting MSAA alone works for on
+ * chip MSAA. Setting MSAA with the LAYERED flag works for MSAA where each
+ * sample is its own image (implements the ES3 spec directly but inefficient on
+ * mobile). */
 
+#define MALI_MFBD_FORMAT_LAYERED  (1 << 0)
 #define MALI_MFBD_FORMAT_MSAA 	  (1 << 1)
 #define MALI_MFBD_FORMAT_SRGB 	  (1 << 2)
 

src/panfrost/pandecode/decode.c

@@ -244,6 +244,7 @@ static const struct pandecode_flag_info u4_flag_info[] = {
 
 #define FLAG_INFO(flag) { MALI_MFBD_FORMAT_##flag, "MALI_MFBD_FORMAT_" #flag }
 static const struct pandecode_flag_info mfbd_fmt_flag_info[] = {
+        FLAG_INFO(LAYERED),
         FLAG_INFO(MSAA),
         FLAG_INFO(SRGB),
         {}