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tegra124: Active dc/sor register change immediately 

When doing DP attach, we need to make sure the register change to
take effect immediately, otherwise it may fail to catch the attach
timing.

BRANCH=None
BUG=chrome-os-partner:28128
TEST=Display works and system boots up on Nyan and Big

Original-Change-Id: I569dc435a1aa4aac0d5ecd0655d2ad87a791246d
Original-Signed-off-by: Vince Hsu <vinceh@nvidia.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/200414
Original-Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Original-Reviewed-by: Jimmy Zhang <jimmzhang@nvidia.com>
Original-Reviewed-by: David Hendricks <dhendrix@chromium.org>
(cherry picked from commit 47b86e2893fa667bebada6a0e0b443886dd5ee02)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>

Change-Id: Icf809b46e675bbdb8633d9a4f31d005d6644bd2a
Reviewed-on: http://review.coreboot.org/7951
Tested-by: build bot (Jenkins)
Reviewed-by: David Hendricks <dhendrix@chromium.org>
This commit is contained in:
Vince Hsu 2014-05-16 18:07:53 +08:00 committed by Marc Jones
parent c09642e315
commit b4bd53a3cb
1 changed files with 3 additions and 1 deletions
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4
src/soc/nvidia/tegra124/sor.c
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@ -762,9 +762,11 @@ void tegra_dc_sor_attach(struct tegra_dc_sor_data *sor)
tegra_dc_sor_super_update(sor);
/* Enable dc */
reg_val = READL(&disp_ctrl->cmd.state_access);
WRITEL(reg_val | WRITE_MUX_ACTIVE, &disp_ctrl->cmd.state_access);
WRITEL(DISP_CTRL_MODE_C_DISPLAY, &disp_ctrl->cmd.disp_cmd);
WRITEL(SOR_ENABLE, &disp_ctrl->disp.disp_win_opt);
WRITEL(GENERAL_ACT_REQ, &disp_ctrl->cmd.state_ctrl);
WRITEL(reg_val, &disp_ctrl->cmd.state_access);
if (tegra_dc_sor_poll_register(sor, NV_SOR_TEST,
NV_SOR_TEST_ACT_HEAD_OPMODE_DEFAULT_MASK,