[Mesa-dev] [PATCH] i965: add 2xMSAA and 16xMSAA to DRI configs for Gen9.

[kevin.rogovin at intel.com]

From: Kevin Rogovin <kevin.rogovin at intel.com>

Special thanks to Eero Tamminen for reporting rasterizer
numbers being twice what it should be for 2xMSAA under
a benchmark.

Signed-off-by: Kevin Rogovin <kevin.rogovin at intel.com>
---
 src/mesa/drivers/dri/i965/intel_screen.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/intel_screen.c b/src/mesa/drivers/dri/i965/intel_screen.c
index 579554f..67eb776 100644
--- a/src/mesa/drivers/dri/i965/intel_screen.c
+++ b/src/mesa/drivers/dri/i965/intel_screen.c
@@ -1882,7 +1882,7 @@ intel_screen_make_configs(__DRIscreen *dri_screen)
    };
 
    static const uint8_t singlesample_samples[1] = {0};
-   static const uint8_t multisample_samples[2]  = {4, 8};
+   static const uint8_t multisample_samples_2_4_8_16[]  = {2, 4, 8, 16};
 
    struct intel_screen *screen = dri_screen->driverPrivate;
    const struct gen_device_info *devinfo = &screen->devinfo;
@@ -1959,6 +1959,7 @@ intel_screen_make_configs(__DRIscreen *dri_screen)
     * supported.  Singlebuffer configs are not supported because no one wants
     * them.
     */
+
    for (unsigned i = 0; i < ARRAY_SIZE(formats); i++) {
       if (devinfo->gen < 6)
          break;
@@ -1966,6 +1967,7 @@ intel_screen_make_configs(__DRIscreen *dri_screen)
       __DRIconfig **new_configs;
       const int num_depth_stencil_bits = 2;
       int num_msaa_modes = 0;
+      const uint8_t *multisample_samples = NULL;
 
       depth_bits[0] = 0;
       stencil_bits[0] = 0;
@@ -1978,10 +1980,16 @@ intel_screen_make_configs(__DRIscreen *dri_screen)
          stencil_bits[1] = 8;
       }
 
-      if (devinfo->gen >= 7)
+      if (devinfo->gen >= 9) {
+         multisample_samples = multisample_samples_2_4_8_16;
+         num_msaa_modes = 4;
+      } else if (devinfo->gen >= 7) {
+         multisample_samples = multisample_samples_2_4_8_16 + 1;
          num_msaa_modes = 2;
-      else if (devinfo->gen == 6)
+      } else if (devinfo->gen == 6) {
+         multisample_samples = multisample_samples_2_4_8_16 + 1;
          num_msaa_modes = 1;
+      }
 
       new_configs = driCreateConfigs(formats[i],
                                      depth_bits,
-- 
2.7.4