gpu: nvgpu: Per-SoC compressible page size

Define smallest compressible page size per SoC, and use that for
determining if a compressible kind should be downgraded to
uncompressed.

Bug 1605769

Change-Id: I7c9991ba0ae82fe533641f045e506c0b01a10d8b
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/724492

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/fb_gk20a.c b/drivers/gpu/nvgpu/gk20a/fb_gk20a.c
index b73be02a..35551939 100644
--- a/drivers/gpu/nvgpu/gk20a/fb_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/fb_gk20a.c
@@ -55,11 +55,17 @@ static int gk20a_fb_compression_page_size(struct gk20a *g)
         return SZ_128K;
 }
 
+static int gk20a_fb_compressible_page_size(struct gk20a *g)
+{
+        return SZ_64K;
+}
+
 void gk20a_init_fb(struct gpu_ops *gops)
 {
         gops->fb.reset = fb_gk20a_reset;
         gops->fb.set_mmu_page_size = gk20a_fb_set_mmu_page_size;
         gops->fb.compression_page_size = gk20a_fb_compression_page_size;
+        gops->fb.compressible_page_size = gk20a_fb_compressible_page_size;
         gk20a_init_uncompressed_kind_map();
         gk20a_init_kind_attr();
 }