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tegra124: Always enable DC when attaching SOR.

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We found that without enabling DC in tegra_dc_sor_enable_dc, kernel would have
problem showing the text console before graphics interface is initialized, for
example "chromeos factory install shim (text only)" or the "splash screen".

BRANCH=none
BUG=chrome-os-partner:28082
TEST=emerge-nyan coreboot chromeos-bootimage
     Boots factory install shim and see text console.

Original-Change-Id: I6fce963ceddd125dd52789d2ec843cc2ee05f1f5
Original-Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/195388
(cherry picked from commit 375a86be9b)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>

Change-Id: Ib75e3ffac9b216c7486845cb8459dd8952d51fe6
Reviewed-on: http://review.coreboot.org/7770
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Tested-by: build bot (Jenkins)
This commit is contained in:
Hung-Te Lin 2014-04-18 00:32:41 +08:00 • committed by Marc Jones
commit 066b164429
1 changed files with 2 additions and 1 deletions
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3
src/soc/nvidia/tegra124/sor.c
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@ -659,7 +659,8 @@ static void tegra_dc_sor_enable_dc(struct tegra_dc_sor_data *sor)
WRITEL(reg_val | WRITE_MUX_ACTIVE, &disp_ctrl->cmd.state_access);
WRITEL(VSYNC_H_POSITION(1), &disp_ctrl->disp.disp_timing_opt);
/* Enable DC */
/* Enable DC now - otherwise pure text console may not show. */
WRITEL(DISP_CTRL_MODE_C_DISPLAY, &disp_ctrl->cmd.disp_cmd);
WRITEL(reg_val, &disp_ctrl->cmd.state_access);
}