[Mesa-dev] [PATCH v14 33/36] i965: Handle compression modifier

[Varad Gautam]

From: Ben Widawsky <ben at bwidawsk.net>

v2: Rename modifier to be more smart (Jason)

FINISHME: Use the kernel's final choice for the fb modifier

bwidawsk at norris2:~/intel-gfx/kmscube (modifiers $) ~/scripts/measure_bandwidth.sh ./kmscube none
Read bandwidth: 603.91 MiB/s
Write bandwidth: 615.28 MiB/s
bwidawsk at norris2:~/intel-gfx/kmscube (modifiers $) ~/scripts/measure_bandwidth.sh ./kmscube ytile
Read bandwidth: 571.13 MiB/s
Write bandwidth: 555.51 MiB/s
bwidawsk at norris2:~/intel-gfx/kmscube (modifiers $) ~/scripts/measure_bandwidth.sh ./kmscube ccs
Read bandwidth: 259.34 MiB/s
Write bandwidth: 337.83 MiB/s

v2: Move all references to the new fourcc code(s) to this patch.
v3: Rebase, remove Yf_CCS (Daniel)

Cc: Jason Ekstrand <jason at jlekstrand.net>
Signed-off-by: Ben Widawsky <ben at bwidawsk.net>
Acked-by: Daniel Stone <daniels at collabora.com>
---
 src/mesa/drivers/dri/i965/intel_screen.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/mesa/drivers/dri/i965/intel_screen.c b/src/mesa/drivers/dri/i965/intel_screen.c
index 86618d7..4fd6d17 100644
--- a/src/mesa/drivers/dri/i965/intel_screen.c
+++ b/src/mesa/drivers/dri/i965/intel_screen.c
@@ -306,6 +306,9 @@ static const struct {
      .height_align = 8 },
    { .tiling = I915_TILING_Y, .modifier = I915_FORMAT_MOD_Y_TILED,
      .height_align = 32 },
+   { .tiling = I915_TILING_Y, .modifier = /* I915_FORMAT_MOD_Y_TILED_CCS */ fourcc_mod_code(INTEL, 4),
+     .height_align = 32, .aux_w_block = 32, .aux_w_align = 128,
+     .aux_h_block = 16, .aux_h_align = 32 },
 };
 
 static uint32_t
@@ -633,6 +636,7 @@ enum modifier_priority {
    MODIFIER_PRIORITY_LINEAR,
    MODIFIER_PRIORITY_X,
    MODIFIER_PRIORITY_Y,
+   MODIFIER_PRIORITY_Y_CCS,
 };
 
 const uint64_t priority_to_modifier[] = {
@@ -640,6 +644,7 @@ const uint64_t priority_to_modifier[] = {
    [MODIFIER_PRIORITY_LINEAR] = DRM_FORMAT_MOD_LINEAR,
    [MODIFIER_PRIORITY_X] = I915_FORMAT_MOD_X_TILED,
    [MODIFIER_PRIORITY_Y] = I915_FORMAT_MOD_Y_TILED,
+   [MODIFIER_PRIORITY_Y_CCS] =  /* I915_FORMAT_MOD_Y_TILED_CCS */ fourcc_mod_code(INTEL, 4),
 };
 
 static uint64_t
@@ -651,6 +656,9 @@ select_best_modifier(struct gen_device_info *devinfo,
 
    for (int i = 0; i < count; i++) {
       switch (modifiers[i]) {
+      case /* I915_FORMAT_MOD_Y_TILED_CCS */ fourcc_mod_code(INTEL, 4):
+         prio = MAX2(prio, MODIFIER_PRIORITY_Y_CCS);
+         break;
       case I915_FORMAT_MOD_Y_TILED:
          prio = MAX2(prio, MODIFIER_PRIORITY_Y);
          break;
@@ -715,6 +723,7 @@ intel_create_image_common(__DRIscreen *dri_screen,
    }
    tiling = modifier_to_tiling(modifier);
    tiled_height = get_tiled_height(tiling, height);
+   ccs_height = get_aux_height(modifier, height);
 
    image = intel_allocate_image(screen, format, loaderPrivate);
    if (image == NULL)
-- 
2.10.0