radeonsi: use better DCC clear codes

Tested-by: Dieter Nützel <Dieter@nuetzel-hh.de>

diff --git a/src/gallium/drivers/radeonsi/si_clear.c b/src/gallium/drivers/radeonsi/si_clear.c
index 8aa3355..3f53753 100644 (file)
--- a/src/gallium/drivers/radeonsi/si_clear.c
+++ b/src/gallium/drivers/radeonsi/si_clear.c
@@ -34,6 +34,15 @@ enum {
        SI_CLEAR_SURFACE = SI_SAVE_FRAMEBUFFER | SI_SAVE_FRAGMENT_STATE,
 };
 
+enum si_dcc_clear_code
+{
+       DCC_CLEAR_COLOR_0000   = 0x00000000,
+       DCC_CLEAR_COLOR_0001   = 0x40404040,
+       DCC_CLEAR_COLOR_1110   = 0x80808080,
+       DCC_CLEAR_COLOR_1111   = 0xC0C0C0C0,
+       DCC_CLEAR_COLOR_REG    = 0x20202020,
+};
+
 static void si_alloc_separate_cmask(struct si_screen *sscreen,
                                    struct si_texture *tex)
 {
@@ -133,7 +142,7 @@ static bool vi_get_fast_clear_parameters(enum pipe_format base_format,
                return false;
 
        *eliminate_needed = true;
-       *clear_value = 0x20202020U; /* use CB clear color registers */
+       *clear_value = DCC_CLEAR_COLOR_REG;
 
        if (desc->layout != UTIL_FORMAT_LAYOUT_PLAIN)
                return true; /* need ELIMINATE_FAST_CLEAR */
@@ -208,10 +217,17 @@ static bool vi_get_fast_clear_parameters(enum pipe_format base_format,
         */
        *eliminate_needed = false;
 
-       if (color_value)
-               *clear_value |= 0x80808080U;
-       if (alpha_value)
-               *clear_value |= 0x40404040U;
+       if (color_value) {
+               if (alpha_value)
+                       *clear_value = DCC_CLEAR_COLOR_1111;
+               else
+                       *clear_value = DCC_CLEAR_COLOR_1110;
+       } else {
+               if (alpha_value)
+                       *clear_value = DCC_CLEAR_COLOR_0001;
+               else
+                       *clear_value = DCC_CLEAR_COLOR_0000;
+       }
        return true;
 }