diff options
| author | Ronald G. Minnich <rminnich@google.com> | 2013-07-16 17:30:16 -0700 |
|---|---|---|
| committer | Patrick Georgi <patrick@georgi-clan.de> | 2013-12-21 18:00:00 +0100 |
| commit | 88750cb3b60fa1d351a69b35ff10c739f4f4e8ce (patch) | |
| tree | 5a1dee399cf34159e8938ff2060ae02a5aa472c5 /src/mainboard | |
| parent | ea3a463460fcc679a25fd8d028fa01515164abae (diff) | |
google/pit: disable SYSMMU for graphics
It's not needed and it's a potential problem source.
Change-Id: Ic4cafe74e7fc3a9031d852895ad7fd5e5cd64d11
Signed-off-by: Ronald G. Minnich <rminnich@google.com>
Reviewed-on: https://gerrit.chromium.org/gerrit/62279
Commit-Queue: David Hendricks <dhendrix@chromium.org>
Reviewed-by: David Hendricks <dhendrix@chromium.org>
Tested-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: http://review.coreboot.org/4410
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
Diffstat (limited to 'src/mainboard')
| -rw-r--r-- | src/mainboard/google/pit/mainboard.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/mainboard/google/pit/mainboard.c b/src/mainboard/google/pit/mainboard.c index 28704677a6..d0230e26f1 100644 --- a/src/mainboard/google/pit/mainboard.c +++ b/src/mainboard/google/pit/mainboard.c @@ -326,6 +326,15 @@ static void mainboard_init(device_t dev) fb_addr = cbmem_find(CBMEM_ID_CONSOLE); set_vbe_mode_info_valid(&edid, (uintptr_t)fb_addr); + /* + * The reset value for FIMD SYSMMU register MMU_CTRL:0x14640000 + * should be 0 according to the datasheet, but has experimentally + * been found to come up as 3. This means FIMD SYSMMU is on by + * default on Exynos5420. For now we are disabling FIMD SYSMMU. + */ + writel(0x0, (void *)0x14640000); + writel(0x0, (void *)0x14680000); + lcd_vdd(); parade_dp_bridge_setup(); |