armv7/exynos: Fix and remove memory reset workarounds

The memory corruption problem in Exynos suspend/resume process is caused by two
things together: PHY_RESET and MRS command.

After stop sending MRS on resume, we can now remove the workaround of skipping
PHY_RESET.

Change-Id: I64acc27c1d2bb549ae6ad7d32ecda94b0355972c
Reviewed-on: https://gerrit.chromium.org/gerrit/64736
Tested-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-by: David Hendricks <dhendrix@chromium.org>
Commit-Queue: Hung-Te Lin <hungte@chromium.org>
Reviewed-on: http://review.coreboot.org/4433
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>

1 files changed, 0 insertions, 7 deletions

diff --git a/src/mainboard/google/snow/romstage.c b/src/mainboard/google/snow/romstage.c
index f69fb1f7eb..92fa21e4a1 100644
--- a/src/mainboard/google/snow/romstage.c
+++ b/src/mainboard/google/snow/romstage.c
@@ -141,13 +141,6 @@ static void setup_memory(struct mem_timings *mem, int is_resume)
 	       mem->mpll_mdiv,
 	       mem->frequency_mhz);
 
-	/* FIXME Currently memory initialization with mem_reset on normal boot
-	 * will cause resume to fail (even if we don't do mem_reset on resume),
-	 * and the workaround is to temporarily always enable "is_resume".
-	 * This should be removed when the root cause of resume issue is found.
-	 */
-	is_resume = 1;
-
 	if (ddr3_mem_ctrl_init(mem, DMC_INTERLEAVE_SIZE, !is_resume)) {
 		die("Failed to initialize memory controller.\n");
 	}