gpu: nvgpu: Remove ELPG_FLUSH

ELPG_FLUSH is not accessible in later GPUs, so we stopped using it
and instead do explicit CBC and L2 flushes. Delete the unused
function op and backing code.

Change-Id: Ic3eb97f2d32ea8fdbe5ec57bd9254268caaf9935
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/1323236
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 0 insertions, 39 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/ltc_gk20a.c b/drivers/gpu/nvgpu/gk20a/ltc_gk20a.c
index 5db48ae7..34a96971 100644
--- a/drivers/gpu/nvgpu/gk20a/ltc_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/ltc_gk20a.c
@@ -189,44 +189,6 @@ static void gk20a_ltc_isr(struct gk20a *g)
         gk20a_writel(g, ltc_ltc0_ltss_intr_r(), intr);
 }
 
-/* Flushes the compression bit cache as well as "data".
- * Note: the name here is a bit of a misnomer.  ELPG uses this
- * internally... but ELPG doesn't have to be on to do it manually.
- */
-static void gk20a_mm_g_elpg_flush_locked(struct gk20a *g)
-{
-        u32 data;
-        s32 retry = 100;
-
-        gk20a_dbg_fn("");
-
-        trace_gk20a_mm_g_elpg_flush_locked(dev_name(g->dev));
-
-        /* Make sure all previous writes are committed to the L2. There's no
-           guarantee that writes are to DRAM. This will be a sysmembar internal
-           to the L2. */
-        gk20a_writel(g, ltc_ltcs_ltss_g_elpg_r(),
-                     ltc_ltcs_ltss_g_elpg_flush_pending_f());
-        do {
-                data = gk20a_readl(g, ltc_ltc0_ltss_g_elpg_r());
-
-                if (ltc_ltc0_ltss_g_elpg_flush_v(data) ==
-                    ltc_ltc0_ltss_g_elpg_flush_pending_v()) {
-                        gk20a_dbg_info("g_elpg_flush 0x%x", data);
-                        retry--;
-                        udelay(5);
-                } else
-                        break;
-        } while (retry >= 0 || !tegra_platform_is_silicon());
-
-        if (tegra_platform_is_silicon() && retry < 0)
-                gk20a_warn(dev_from_gk20a(g),
-                            "g_elpg_flush too many retries");
-
-        trace_gk20a_mm_g_elpg_flush_locked_done(dev_name(g->dev));
-
-}
-
 static int gk20a_determine_L2_size_bytes(struct gk20a *g)
 {
         u32 lts_per_ltc;
@@ -279,7 +241,6 @@ void gk20a_init_ltc(struct gpu_ops *gops)
 #ifdef CONFIG_DEBUG_FS
         gops->ltc.sync_debugfs = gk20a_ltc_sync_debugfs;
 #endif
-        gops->ltc.elpg_flush = gk20a_mm_g_elpg_flush_locked;
         gops->ltc.init_fs_state = gk20a_ltc_init_fs_state;
         gops->ltc.isr = gk20a_ltc_isr;
 }