Module: Mesa
Branch: master
Commit: 6c681b4cc1aab20f280dfce88d77896b64588144
URL:    
http://cgit.freedesktop.org/mesa/mesa/commit/?id=6c681b4cc1aab20f280dfce88d77896b64588144

Author: Anuj Phogat <[email protected]>
Date:   Tue Oct 31 09:28:09 2017 -0700

i965/gen10: Enable float blend optimization

This optimization is enabled for previous generations too.
See Mesa commit c17e214a6b
On CNL this bit has been moved to CACHE_MODE_SS register.

Signed-off-by: Anuj Phogat <[email protected]>
Reviewed-by: Nanley Chery <[email protected]>

---

 src/mesa/drivers/dri/i965/brw_defines.h      | 3 +++
 src/mesa/drivers/dri/i965/brw_state_upload.c | 6 ++++++
 2 files changed, 9 insertions(+)

diff --git a/src/mesa/drivers/dri/i965/brw_defines.h 
b/src/mesa/drivers/dri/i965/brw_defines.h
index 270cdf29db..105fff3548 100644
--- a/src/mesa/drivers/dri/i965/brw_defines.h
+++ b/src/mesa/drivers/dri/i965/brw_defines.h
@@ -1688,6 +1688,9 @@ enum brw_pixel_shader_coverage_mask_mode {
 # define GEN8_L3CNTLREG_ALL_ALLOC_SHIFT    25
 # define GEN8_L3CNTLREG_ALL_ALLOC_MASK     INTEL_MASK(31, 25)
 
+#define GEN10_CACHE_MODE_SS            0x0e420
+#define GEN10_FLOAT_BLEND_OPTIMIZATION_ENABLE (1 << 4)
+
 #define INSTPM                             0x20c0
 # define INSTPM_CONSTANT_BUFFER_ADDRESS_OFFSET_DISABLE (1 << 6)
 
diff --git a/src/mesa/drivers/dri/i965/brw_state_upload.c 
b/src/mesa/drivers/dri/i965/brw_state_upload.c
index 9e1cf54abd..9e64213c2e 100644
--- a/src/mesa/drivers/dri/i965/brw_state_upload.c
+++ b/src/mesa/drivers/dri/i965/brw_state_upload.c
@@ -62,6 +62,12 @@ brw_upload_initial_gpu_state(struct brw_context *brw)
 
    brw_upload_invariant_state(brw);
 
+   if (devinfo->gen == 10) {
+      brw_load_register_imm32(brw, GEN10_CACHE_MODE_SS,
+                              REG_MASK(GEN10_FLOAT_BLEND_OPTIMIZATION_ENABLE) |
+                              GEN10_FLOAT_BLEND_OPTIMIZATION_ENABLE);
+   }
+
    if (devinfo->gen == 9) {
       /* Recommended optimizations for Victim Cache eviction and floating
        * point blending.

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